xref: /dports/databases/percona57-client/percona-server-5.7.36-39/sql/mysqld.cc

/* Copyright (c) 2000, 2021, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#include "mysqld.h"
#include "mysqld_daemon.h"

#include <vector>
#include <algorithm>
#include <functional>
#include <list>
#include <set>
#include <string>

#include <fenv.h>
#include <signal.h>
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef _WIN32
#include <crtdbg.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif

#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif

#include "sql_parse.h"    // test_if_data_home_dir
#include "sql_cache.h"    // query_cache, query_cache_*
#include "sql_locale.h"   // MY_LOCALES, my_locales, my_locale_by_name
#include "sql_show.h"     // free_status_vars, add_status_vars,
                          // reset_status_vars
#include "strfunc.h"      // find_set_from_flags
#include "parse_file.h"   // File_parser_dummy_hook
#include "sql_db.h"       // my_dboptions_cache_free
                          // my_dboptions_cache_init
#include "sql_table.h"    // release_ddl_log, execute_ddl_log_recovery
#include "sql_connect.h"  // free_max_user_conn, init_max_user_conn,
                          // handle_one_connection
#include "sql_time.h"     // known_date_time_formats,
                          // get_date_time_format_str
#include "tztime.h"       // my_tz_free, my_tz_init, my_tz_SYSTEM
#include "hostname.h"     // hostname_cache_free, hostname_cache_init
#include "auth_common.h"  // set_default_auth_plugin
                          // acl_free, acl_init
                          // grant_free, grant_init
#include "sql_base.h"     // table_def_free, table_def_init,
                          // Table_cache,
                          // cached_table_definitions
#include "sql_test.h"     // mysql_print_status
#include "item_create.h"  // item_create_cleanup, item_create_init
#include "sql_servers.h"  // servers_free, servers_init
#include "init.h"         // unireg_init
#include "derror.h"       // init_errmessage
#include "des_key_file.h" // load_des_key_file
#include "sql_manager.h"  // stop_handle_manager, start_handle_manager
#include "bootstrap.h"    // bootstrap
#include <m_ctype.h>
#include <my_dir.h>
#include <my_bit.h>
#include "rpl_gtid.h"
#include "rpl_gtid_persist.h"
#include "rpl_slave.h"
#include "rpl_msr.h"
#include "rpl_master.h"
#include "rpl_mi.h"
#include "rpl_filter.h"
#include <sql_common.h>
#include <my_stacktrace.h>
#include "mysqld_suffix.h"
#include "mysys_err.h"
#include "events.h"
#include "sql_audit.h"
#include "probes_mysql.h"
#include "debug_sync.h"
#include "sql_callback.h"
#include "opt_trace_context.h"
#include "opt_costconstantcache.h"
#include "sql_plugin.h"                         // plugin_shutdown
#include "sql_initialize.h"
#include "log_event.h"
#include "log.h"
#include "binlog.h"
#include "rpl_rli.h"     // Relay_log_info
#include "replication.h" // thd_enter_cond

#include "my_default.h"
#include "threadpool.h"
#include "mysql_version.h"

#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
#include "../storage/perfschema/pfs_server.h"
#include <pfs_idle_provider.h>
#endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */

#include "pfs_file_provider.h"
#include "mysql/psi/mysql_file.h"

#include <mysql/psi/mysql_idle.h>
#include <mysql/psi/mysql_socket.h>
#include <mysql/psi/mysql_memory.h>
#include <mysql/psi/mysql_statement.h>

#include "migrate_keyring.h"            // Migrate_keyring
#include "mysql_com_server.h"
#include "keycaches.h"
#include "../storage/myisam/ha_myisam.h"
#include "set_var.h"
#include "sys_vars_shared.h"
#include "rpl_injector.h"
#include "rpl_handler.h"
#include <ft_global.h>
#include <errmsg.h>
#include "sp_rcontext.h"
#include "sql_reload.h"  // reload_acl_and_cache
#include "sp_head.h"  // init_sp_psi_keys
#include "event_data_objects.h" //init_scheduler_psi_keys
#include "my_timer.h"    // my_timer_init, my_timer_deinit
#include "table_cache.h"                // table_cache_manager
#include "connection_acceptor.h"        // Connection_acceptor
#include "connection_handler_impl.h"    // *_connection_handler
#include "connection_handler_manager.h" // Connection_handler_manager
#include "socket_connection.h"          // Mysqld_socket_listener
#include "mysqld_thd_manager.h"         // Global_THD_manager
#include "my_getopt.h"
#include "partitioning/partition_handler.h" // partitioning_init
#include "item_cmpfunc.h"               // arg_cmp_func
#include "item_strfunc.h"               // Item_func_uuid
#include "handler.h"

#if defined(HAVE_OPENSSL)
#include <openssl/crypto.h>
#endif

#ifndef EMBEDDED_LIBRARY
#include "srv_session.h"
#endif

#ifdef _WIN32
#include "named_pipe.h"
#include "named_pipe_connection.h"
#include "shared_memory_connection.h"
#endif

using std::min;
using std::max;
using std::vector;

#define mysqld_charset &my_charset_latin1

#ifdef HAVE_FPU_CONTROL_H
# include <fpu_control.h>
#elif defined(__i386__)
# define fpu_control_t unsigned int
# define _FPU_EXTENDED 0x300
# define _FPU_DOUBLE 0x200
# if defined(__GNUC__) || defined(__SUNPRO_CC)
#  define _FPU_GETCW(cw) asm volatile ("fnstcw %0" : "=m" (*&cw))
#  define _FPU_SETCW(cw) asm volatile ("fldcw %0" : : "m" (*&cw))
# else
#  define _FPU_GETCW(cw) (cw= 0)
#  define _FPU_SETCW(cw)
# endif
#endif

inline void setup_fpu()
{
#ifdef HAVE_FEDISABLEEXCEPT
  fedisableexcept(FE_ALL_EXCEPT);
#endif

  /* Set FPU rounding mode to "round-to-nearest" */
  fesetround(FE_TONEAREST);

  /*
    x86 (32-bit) requires FPU precision to be explicitly set to 64 bit
    (double precision) for portable results of floating point operations.
    However, there is no need to do so if compiler is using SSE2 for floating
    point, double values will be stored and processed in 64 bits anyway.
  */
#if defined(__i386__) && !defined(__SSE2_MATH__)
#if defined(_WIN32)
#if !defined(_WIN64)
  _control87(_PC_53, MCW_PC);
#endif /* !_WIN64 */
#else /* !_WIN32 */
  fpu_control_t cw;
  _FPU_GETCW(cw);
  cw= (cw & ~_FPU_EXTENDED) | _FPU_DOUBLE;
  _FPU_SETCW(cw);
#endif /* _WIN32 && */
#endif /* __i386__ */

}

#ifndef EMBEDDED_LIBRARY
extern "C" void handle_fatal_signal(int sig);
#endif

/* Constants */

#include <welcome_copyright_notice.h> // ORACLE_WELCOME_COPYRIGHT_NOTICE

const char *show_comp_option_name[]= {"YES", "NO", "DISABLED"};

static const char *tc_heuristic_recover_names[]=
{
  "OFF", "COMMIT", "ROLLBACK", NullS
};
static TYPELIB tc_heuristic_recover_typelib=
{
  array_elements(tc_heuristic_recover_names)-1,"",
  tc_heuristic_recover_names, NULL
};

const char *first_keyword= "first", *binary_keyword= "BINARY";
const char *my_localhost= "localhost";

bool opt_large_files= sizeof(my_off_t) > 4;
static my_bool opt_autocommit; ///< for --autocommit command-line option

/*
  Used with --help for detailed option
*/
my_bool opt_help= 0, opt_verbose= 0;

arg_cmp_func Arg_comparator::comparator_matrix[5][2] =
{{&Arg_comparator::compare_string,     &Arg_comparator::compare_e_string},
 {&Arg_comparator::compare_real,       &Arg_comparator::compare_e_real},
 {&Arg_comparator::compare_int_signed, &Arg_comparator::compare_e_int},
 {&Arg_comparator::compare_row,        &Arg_comparator::compare_e_row},
 {&Arg_comparator::compare_decimal,    &Arg_comparator::compare_e_decimal}};

#ifdef HAVE_PSI_INTERFACE
#ifndef EMBEDDED_LIBRARY
#if defined(_WIN32)
static PSI_thread_key key_thread_handle_con_namedpipes;
static PSI_thread_key key_thread_handle_con_sharedmem;
static PSI_thread_key key_thread_handle_con_sockets;
static PSI_mutex_key key_LOCK_handler_count;
static PSI_cond_key key_COND_handler_count;
static PSI_thread_key key_thread_handle_shutdown;
static PSI_rwlock_key key_rwlock_LOCK_named_pipe_full_access_group;
#else
static PSI_mutex_key key_LOCK_socket_listener_active;
static PSI_cond_key key_COND_socket_listener_active;
static PSI_mutex_key key_LOCK_start_signal_handler;
static PSI_cond_key key_COND_start_signal_handler;
#endif // _WIN32
#endif // !EMBEDDED_LIBRARY
#endif /* HAVE_PSI_INTERFACE */

/**
  Statement instrumentation key for replication.
*/
#ifdef HAVE_PSI_STATEMENT_INTERFACE
PSI_statement_info stmt_info_rpl;
#endif

/* the default log output is log tables */
static bool lower_case_table_names_used= 0;
#if !defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
static bool socket_listener_active= false;
static int pipe_write_fd= -1;
static my_bool opt_daemonize= 0;
#endif
static my_bool opt_debugging= 0, opt_external_locking= 0, opt_console= 0;
static my_bool opt_short_log_format= 0;
static char *mysqld_user, *mysqld_chroot;
static char *default_character_set_name;
static char *character_set_filesystem_name;
static char *lc_messages;
static char *lc_time_names_name;
char *my_bind_addr_str;
char *my_proxy_protocol_networks;
static char *default_collation_name;
char *default_storage_engine;
char *default_tmp_storage_engine;
/**
   Use to mark which engine should be choosen to create internal
   temp table
 */
ulong internal_tmp_disk_storage_engine;
static char compiled_default_collation_name[]= MYSQL_DEFAULT_COLLATION_NAME;
static bool binlog_format_used= false;

LEX_STRING opt_init_connect, opt_init_slave;

/* Global variables */

bool opt_bin_log, opt_ignore_builtin_innodb= 0;
bool opt_general_log, opt_slow_log, opt_general_log_raw;
ulonglong slow_query_log_always_write_time= 10000000;
ulonglong log_output_options;
my_bool opt_log_queries_not_using_indexes= 0;
ulong opt_log_throttle_queries_not_using_indexes= 0;
bool opt_disable_networking=0, opt_skip_show_db=0;
bool opt_skip_name_resolve=0;
my_bool opt_character_set_client_handshake= 1;
bool server_id_supplied = false;
bool opt_endinfo, using_udf_functions;
my_bool locked_in_memory;
bool opt_using_transactions;
bool volatile abort_loop;
ulong opt_tc_log_size;
bool opt_libcoredumper, opt_corefile= 0;

static enum_server_operational_state server_operational_state= SERVER_BOOTING;
ulong log_warnings;
bool  opt_log_syslog_enable;
char *opt_log_syslog_tag= NULL;
char *opt_keyring_migration_user= NULL;
char *opt_keyring_migration_host= NULL;
char *opt_keyring_migration_password= NULL;
char *opt_keyring_migration_socket= NULL;
char *opt_keyring_migration_source= NULL;
char *opt_keyring_migration_destination= NULL;
ulong opt_keyring_migration_port= 0;
bool migrate_connect_options= 0;
uint test_flags= 0;
#ifndef _WIN32
bool  opt_log_syslog_include_pid;
char *opt_log_syslog_facility;

#else
/*
  Thread handle of shutdown event handler thread.
  It is used as argument during thread join.
*/
my_thread_handle shutdown_thr_handle;
#endif
uint host_cache_size;
ulong log_error_verbosity= 3; // have a non-zero value during early start-up

#if MYSQL_VERSION_ID >= 50800
#error "show_compatibility_56 is to be removed in MySQL 5.8"
#else
/*
  Default value TRUE for the EMBEDDED_LIBRARY,
  default value from Sys_show_compatibility_56 otherwise.
*/
my_bool show_compatibility_56= TRUE;
#endif /* MYSQL_VERSION_ID >= 50800 */

#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
ulong slow_start_timeout;
#endif

my_bool opt_bootstrap= 0;
my_bool opt_initialize= 0;
my_bool opt_disable_partition_check= TRUE;
my_bool opt_skip_slave_start = 0; ///< If set, slave is not autostarted
my_bool opt_reckless_slave = 0;
my_bool opt_enable_named_pipe= 0;
my_bool opt_local_infile, opt_slave_compressed_protocol;
my_bool opt_safe_user_create = 0;
my_bool opt_show_slave_auth_info;
my_bool opt_log_slave_updates= 0;
char *opt_slave_skip_errors;
my_bool opt_slave_allow_batching= 0;

/**
  compatibility option:
    - index usage hints (USE INDEX without a FOR clause) behave as in 5.0
*/
my_bool old_mode;

/*
  Legacy global handlerton. These will be removed (please do not add more).
*/
handlerton *heap_hton;
handlerton *myisam_hton;
handlerton *innodb_hton;

char *opt_disabled_storage_engines;
uint opt_server_id_bits= 0;
ulong opt_server_id_mask= 0;
my_bool read_only= 0, opt_readonly= 0;
my_bool super_read_only= 0, opt_super_readonly= 0;
my_bool opt_require_secure_transport= 0;
my_bool use_temp_pool, relay_log_purge;
my_bool relay_log_recovery;
my_bool opt_sync_frm, opt_allow_suspicious_udfs;
my_bool opt_secure_auth= 0;
char* opt_secure_file_priv;
my_bool opt_log_slow_admin_statements= 0;
my_bool opt_log_slow_slave_statements= 0;
ulong opt_log_slow_sp_statements= 0;
ulonglong opt_slow_query_log_use_global_control= 0;
ulong opt_slow_query_log_rate_type= 0;
my_bool lower_case_file_system= 0;
my_bool opt_large_pages= 0;
my_bool opt_super_large_pages= 0;
my_bool opt_myisam_use_mmap= 0;
my_bool offline_mode= 0;
my_bool opt_log_builtin_as_identified_by_password= 0;
uint   opt_large_page_size= 0;
uint default_password_lifetime= 0;

mysql_mutex_t LOCK_default_password_lifetime;

#if defined(ENABLED_DEBUG_SYNC)
MYSQL_PLUGIN_IMPORT uint    opt_debug_sync_timeout= 0;
#endif /* defined(ENABLED_DEBUG_SYNC) */
my_bool opt_old_style_user_limits= 0, trust_function_creators= 0;
my_bool opt_userstat= 0, opt_thread_statistics= 0;
my_bool check_proxy_users= 0, mysql_native_password_proxy_users= 0, sha256_password_proxy_users= 0;
/*
  True if there is at least one per-hour limit for some user, so we should
  check them before each query (and possibly reset counters when hour is
  changed). False otherwise.
*/
volatile bool mqh_used = 0;
my_bool opt_noacl= 0;
my_bool sp_automatic_privileges= 1;

ulong opt_binlog_rows_event_max_size;
const char *binlog_checksum_default= "NONE";
ulong binlog_checksum_options;
my_bool opt_master_verify_checksum= 0;
my_bool opt_slave_sql_verify_checksum= 1;
const char *binlog_format_names[]= {"MIXED", "STATEMENT", "ROW", NullS};
my_bool binlog_gtid_simple_recovery;
ulong binlog_error_action;
const char *binlog_error_action_list[]= {"IGNORE_ERROR", "ABORT_SERVER", NullS};
my_bool opt_binlog_skip_flush_commands= 0;
uint32 gtid_executed_compression_period= 0;
my_bool opt_log_unsafe_statements;

#ifdef HAVE_INITGROUPS
volatile sig_atomic_t calling_initgroups= 0; /**< Used in SIGSEGV handler. */
#endif
const char *timestamp_type_names[]= {"UTC", "SYSTEM", NullS};
ulong opt_log_timestamps;
uint mysqld_port, select_errors, dropping_tables, ha_open_options;
uint mysqld_extra_port;
uint mysqld_port_timeout;
ulong delay_key_write_options;
uint protocol_version;
uint lower_case_table_names;
long tc_heuristic_recover;
ulong back_log, connect_timeout, server_id;
ulong table_cache_size, table_def_size;
ulong table_cache_instances;
ulong table_cache_size_per_instance;
ulong what_to_log;
ulong slow_launch_time;
Atomic_int32 slave_open_temp_tables;
ulong open_files_limit, max_binlog_size, max_relay_log_size;
ulong slave_trans_retries;
uint  slave_net_timeout;
ulong slave_exec_mode_options;
ulonglong slave_type_conversions_options;
ulong opt_mts_slave_parallel_workers;
ulonglong opt_mts_pending_jobs_size_max;
ulonglong slave_rows_search_algorithms_options;

#ifdef HAVE_REPLICATION
my_bool opt_slave_preserve_commit_order;
#endif

#ifndef NDEBUG
uint slave_rows_last_search_algorithm_used;
#endif
ulong mts_parallel_option;
ulong binlog_cache_size=0;
ulonglong  max_binlog_cache_size=0;
ulong slave_max_allowed_packet= 0;
ulong binlog_stmt_cache_size=0;
int32 opt_binlog_max_flush_queue_time= 0;
long opt_binlog_group_commit_sync_delay= 0;
ulong opt_binlog_group_commit_sync_no_delay_count= 0;
ulonglong  max_binlog_stmt_cache_size=0;
ulong query_cache_size=0;
ulong refresh_version;  /* Increments on each reload */
query_id_t global_query_id;
ulong aborted_threads;
ulong delayed_insert_timeout, delayed_insert_limit, delayed_queue_size;
ulong delayed_insert_threads, delayed_insert_writes, delayed_rows_in_use;
ulong delayed_insert_errors,flush_time;
ulong specialflag=0;
ulong binlog_cache_use= 0, binlog_cache_disk_use= 0;
ulong binlog_stmt_cache_use= 0, binlog_stmt_cache_disk_use= 0;
ulong max_connections, max_connect_errors;
ulong extra_max_connections;
ulong rpl_stop_slave_timeout= LONG_TIMEOUT;
my_bool log_bin_use_v1_row_events= 0;
bool thread_cache_size_specified= false;
bool host_cache_size_specified= false;
bool table_definition_cache_specified= false;
ulong locked_account_connection_count= 0;
bool opt_keyring_operations= TRUE;

ulonglong denied_connections= 0;

/**
  Limit of the total number of prepared statements in the server.
  Is necessary to protect the server against out-of-memory attacks.
*/
ulong max_prepared_stmt_count;
/**
  Current total number of prepared statements in the server. This number
  is exact, and therefore may not be equal to the difference between
  `com_stmt_prepare' and `com_stmt_close' (global status variables), as
  the latter ones account for all registered attempts to prepare
  a statement (including unsuccessful ones).  Prepared statements are
  currently connection-local: if the same SQL query text is prepared in
  two different connections, this counts as two distinct prepared
  statements.
*/
ulong prepared_stmt_count=0;
ulong current_pid;
uint sync_binlog_period= 0, sync_relaylog_period= 0,
     sync_relayloginfo_period= 0, sync_masterinfo_period= 0,
     opt_mts_checkpoint_period, opt_mts_checkpoint_group;
ulong expire_logs_days = 0;
/**
  Soft upper limit for number of sp_head objects that can be stored
  in the sp_cache for one connection.
*/
ulong stored_program_cache_size= 0;
/**
  Compatibility option to prevent auto upgrade of old temporals
  during certain ALTER TABLE operations.
*/
my_bool avoid_temporal_upgrade;

const double log_10[] = {
  1e000, 1e001, 1e002, 1e003, 1e004, 1e005, 1e006, 1e007, 1e008, 1e009,
  1e010, 1e011, 1e012, 1e013, 1e014, 1e015, 1e016, 1e017, 1e018, 1e019,
  1e020, 1e021, 1e022, 1e023, 1e024, 1e025, 1e026, 1e027, 1e028, 1e029,
  1e030, 1e031, 1e032, 1e033, 1e034, 1e035, 1e036, 1e037, 1e038, 1e039,
  1e040, 1e041, 1e042, 1e043, 1e044, 1e045, 1e046, 1e047, 1e048, 1e049,
  1e050, 1e051, 1e052, 1e053, 1e054, 1e055, 1e056, 1e057, 1e058, 1e059,
  1e060, 1e061, 1e062, 1e063, 1e064, 1e065, 1e066, 1e067, 1e068, 1e069,
  1e070, 1e071, 1e072, 1e073, 1e074, 1e075, 1e076, 1e077, 1e078, 1e079,
  1e080, 1e081, 1e082, 1e083, 1e084, 1e085, 1e086, 1e087, 1e088, 1e089,
  1e090, 1e091, 1e092, 1e093, 1e094, 1e095, 1e096, 1e097, 1e098, 1e099,
  1e100, 1e101, 1e102, 1e103, 1e104, 1e105, 1e106, 1e107, 1e108, 1e109,
  1e110, 1e111, 1e112, 1e113, 1e114, 1e115, 1e116, 1e117, 1e118, 1e119,
  1e120, 1e121, 1e122, 1e123, 1e124, 1e125, 1e126, 1e127, 1e128, 1e129,
  1e130, 1e131, 1e132, 1e133, 1e134, 1e135, 1e136, 1e137, 1e138, 1e139,
  1e140, 1e141, 1e142, 1e143, 1e144, 1e145, 1e146, 1e147, 1e148, 1e149,
  1e150, 1e151, 1e152, 1e153, 1e154, 1e155, 1e156, 1e157, 1e158, 1e159,
  1e160, 1e161, 1e162, 1e163, 1e164, 1e165, 1e166, 1e167, 1e168, 1e169,
  1e170, 1e171, 1e172, 1e173, 1e174, 1e175, 1e176, 1e177, 1e178, 1e179,
  1e180, 1e181, 1e182, 1e183, 1e184, 1e185, 1e186, 1e187, 1e188, 1e189,
  1e190, 1e191, 1e192, 1e193, 1e194, 1e195, 1e196, 1e197, 1e198, 1e199,
  1e200, 1e201, 1e202, 1e203, 1e204, 1e205, 1e206, 1e207, 1e208, 1e209,
  1e210, 1e211, 1e212, 1e213, 1e214, 1e215, 1e216, 1e217, 1e218, 1e219,
  1e220, 1e221, 1e222, 1e223, 1e224, 1e225, 1e226, 1e227, 1e228, 1e229,
  1e230, 1e231, 1e232, 1e233, 1e234, 1e235, 1e236, 1e237, 1e238, 1e239,
  1e240, 1e241, 1e242, 1e243, 1e244, 1e245, 1e246, 1e247, 1e248, 1e249,
  1e250, 1e251, 1e252, 1e253, 1e254, 1e255, 1e256, 1e257, 1e258, 1e259,
  1e260, 1e261, 1e262, 1e263, 1e264, 1e265, 1e266, 1e267, 1e268, 1e269,
  1e270, 1e271, 1e272, 1e273, 1e274, 1e275, 1e276, 1e277, 1e278, 1e279,
  1e280, 1e281, 1e282, 1e283, 1e284, 1e285, 1e286, 1e287, 1e288, 1e289,
  1e290, 1e291, 1e292, 1e293, 1e294, 1e295, 1e296, 1e297, 1e298, 1e299,
  1e300, 1e301, 1e302, 1e303, 1e304, 1e305, 1e306, 1e307, 1e308
};

time_t server_start_time, flush_status_time;

char server_uuid[UUID_LENGTH+1];
const char *server_uuid_ptr;
char mysql_home[FN_REFLEN], pidfile_name[FN_REFLEN], system_time_zone[30];
char default_logfile_name[FN_REFLEN];
char *default_tz_name;
static char errorlog_filename_buff[FN_REFLEN];
const char *log_error_dest;
char glob_hostname[FN_REFLEN];
char mysql_real_data_home[FN_REFLEN],
     lc_messages_dir[FN_REFLEN], reg_ext[FN_EXTLEN],
     mysql_charsets_dir[FN_REFLEN],
     *opt_init_file, *opt_tc_log_file;
char *lc_messages_dir_ptr;
char mysql_unpacked_real_data_home[FN_REFLEN];
size_t mysql_unpacked_real_data_home_len;
size_t mysql_real_data_home_len, mysql_data_home_len= 1;
uint reg_ext_length;
const key_map key_map_empty(0);
key_map key_map_full(0);                        // Will be initialized later
char logname_path[FN_REFLEN];
char slow_logname_path[FN_REFLEN];
char secure_file_real_path[FN_REFLEN];

Date_time_format global_date_format, global_datetime_format, global_time_format;
Time_zone *default_tz;

char *mysql_data_home= const_cast<char*>(".");
const char *mysql_real_data_home_ptr= mysql_real_data_home;
char server_version[SERVER_VERSION_LENGTH];
char server_version_suffix[SERVER_VERSION_LENGTH];
char *mysqld_unix_port, *opt_mysql_tmpdir;
my_bool encrypt_binlog;

my_bool encrypt_tmp_files;

/** name of reference on left expression in rewritten IN subquery */
const char *in_left_expr_name= "<left expr>";
/** name of additional condition */
const char *in_additional_cond= "<IN COND>";
const char *in_having_cond= "<IN HAVING>";

my_decimal decimal_zero;
#ifndef EMBEDDED_LIBRARY
/** Number of connection errors from internal server errors. */
ulong connection_errors_internal= 0;
/** Number of errors when reading the peer address. */
ulong connection_errors_peer_addr= 0;
#endif

/* classes for comparation parsing/processing */
Eq_creator eq_creator;
Ne_creator ne_creator;
Equal_creator equal_creator;
Gt_creator gt_creator;
Lt_creator lt_creator;
Ge_creator ge_creator;
Le_creator le_creator;

Rpl_filter* rpl_filter;
Rpl_filter* binlog_filter;

struct system_variables global_system_variables;
struct system_variables max_system_variables;
struct system_status_var global_status_var;

MY_TMPDIR mysql_tmpdir_list;
MY_BITMAP temp_pool;

CHARSET_INFO *system_charset_info, *files_charset_info ;
CHARSET_INFO *national_charset_info, *table_alias_charset;
CHARSET_INFO *character_set_filesystem;
CHARSET_INFO *error_message_charset_info;

MY_LOCALE *my_default_lc_messages;
MY_LOCALE *my_default_lc_time_names;

SHOW_COMP_OPTION have_ssl, have_symlink, have_dlopen, have_query_cache;
SHOW_COMP_OPTION have_geometry, have_rtree_keys;
SHOW_COMP_OPTION have_crypt, have_compress;
SHOW_COMP_OPTION have_profiling;
SHOW_COMP_OPTION have_statement_timeout= SHOW_OPTION_DISABLED;
SHOW_COMP_OPTION have_backup_locks;
SHOW_COMP_OPTION have_backup_safe_binlog_info;
SHOW_COMP_OPTION have_snapshot_cloning;

char* enforce_storage_engine= NULL;

char* utility_user= NULL;
char* utility_user_password= NULL;
char* utility_user_schema_access= NULL;

char* opt_libcoredumper_path= NULL;

/* Plucking this from sql/sql_acl.cc for an array of privilege names */
extern TYPELIB utility_user_privileges_typelib;
ulonglong utility_user_privileges= 0;

/* Thread specific variables */

thread_local_key_t THR_MALLOC;
bool THR_MALLOC_initialized= false;
thread_local_key_t THR_THD;
bool THR_THD_initialized= false;
mysql_mutex_t
  LOCK_status, LOCK_uuid_generator,
  LOCK_crypt,
  LOCK_global_system_variables,
  LOCK_user_conn, LOCK_slave_list,
  LOCK_error_messages;
mysql_mutex_t LOCK_sql_rand;

mysql_mutex_t
  LOCK_global_user_client_stats,
  LOCK_global_table_stats, LOCK_global_index_stats;
/**
  The below lock protects access to two global server variables:
  max_prepared_stmt_count and prepared_stmt_count. These variables
  set the limit and hold the current total number of prepared statements
  in the server, respectively. As PREPARE/DEALLOCATE rate in a loaded
  server may be fairly high, we need a dedicated lock.
*/
mysql_mutex_t LOCK_prepared_stmt_count;

/*
 The below two locks are introudced as guards (second mutex) for
  the global variables sql_slave_skip_counter and slave_net_timeout
  respectively. See fix_slave_skip_counter/fix_slave_net_timeout
  for more details
*/
mysql_mutex_t LOCK_sql_slave_skip_counter;
mysql_mutex_t LOCK_slave_net_timeout;
mysql_mutex_t LOCK_slave_trans_dep_tracker;
mysql_mutex_t LOCK_log_throttle_qni;
mysql_mutex_t LOCK_offline_mode;
#ifdef HAVE_OPENSSL
mysql_mutex_t LOCK_des_key_file;
#endif
mysql_rwlock_t LOCK_sys_init_connect, LOCK_sys_init_slave;
mysql_rwlock_t LOCK_system_variables_hash;
my_thread_handle signal_thread_id;
my_thread_attr_t connection_attrib;
mysql_mutex_t LOCK_server_started;
mysql_cond_t COND_server_started;
mysql_mutex_t LOCK_reset_gtid_table;
mysql_mutex_t LOCK_compress_gtid_table;
mysql_cond_t COND_compress_gtid_table;
#if !defined (EMBEDDED_LIBRARY) && !defined(_WIN32)
mysql_mutex_t LOCK_socket_listener_active;
mysql_cond_t COND_socket_listener_active;
mysql_mutex_t LOCK_start_signal_handler;
mysql_cond_t COND_start_signal_handler;
#endif
mysql_rwlock_t LOCK_consistent_snapshot;

bool mysqld_server_started= false;

/*
  The below lock protects access to global server variable
  keyring_operations.
*/
mysql_mutex_t LOCK_keyring_operations;

File_parser_dummy_hook file_parser_dummy_hook;

/* replication parameters, if master_host is not NULL, we are a slave */
uint report_port= 0;
ulong master_retry_count=0;
char *master_info_file;
char *relay_log_info_file, *report_user, *report_password, *report_host;
char *opt_relay_logname = 0, *opt_relaylog_index_name=0;
char *opt_general_logname, *opt_slow_logname, *opt_bin_logname;

/* Static variables */

static volatile sig_atomic_t kill_in_progress;

static my_bool opt_myisam_log;
static int cleanup_done;
static ulong opt_specialflag;
static char *opt_update_logname;
char *opt_binlog_index_name;
char *mysql_home_ptr, *pidfile_name_ptr;
char *default_auth_plugin;
/** Initial command line arguments (count), after load_defaults().*/
static int defaults_argc;
/**
  Initial command line arguments (arguments), after load_defaults().
  This memory is allocated by @c load_defaults() and should be freed
  using @c free_defaults().
  Do not modify defaults_argc / defaults_argv,
  use remaining_argc / remaining_argv instead to parse the command
  line arguments in multiple steps.
*/
static char **defaults_argv;
/** Remaining command line arguments (count), filtered by handle_options().*/
static int remaining_argc;
/** Remaining command line arguments (arguments), filtered by handle_options().*/
static char **remaining_argv;

int orig_argc;
char **orig_argv;

#if defined(HAVE_OPENSSL)
bool init_rsa_keys(void);
void deinit_rsa_keys(void);
int show_rsa_public_key(THD *thd, SHOW_VAR *var, char *buff);
#endif

Connection_acceptor<Mysqld_socket_listener> *mysqld_socket_acceptor= NULL;
#ifdef _WIN32
static Named_pipe_listener *named_pipe_listener= NULL;
Connection_acceptor<Named_pipe_listener> *named_pipe_acceptor= NULL;
Connection_acceptor<Shared_mem_listener> *shared_mem_acceptor= NULL;
mysql_rwlock_t LOCK_named_pipe_full_access_group;
char *named_pipe_full_access_group;
#endif

Checkable_rwlock *global_sid_lock= NULL;
Sid_map *global_sid_map= NULL;
Gtid_state *gtid_state= NULL;
Gtid_table_persistor *gtid_table_persistor= NULL;


void set_remaining_args(int argc, char **argv)
{
  remaining_argc= argc;
  remaining_argv= argv;
}
/*
  Multiple threads of execution use the random state maintained in global
  sql_rand to generate random numbers. sql_rnd_with_mutex use mutex
  LOCK_sql_rand to protect sql_rand across multiple instantiations that use
  sql_rand to generate random numbers.
 */
ulong sql_rnd_with_mutex()
{
  mysql_mutex_lock(&LOCK_sql_rand);
  ulong tmp=(ulong) (my_rnd(&sql_rand) * 0xffffffff); /* make all bits random */
  mysql_mutex_unlock(&LOCK_sql_rand);
  return tmp;
}


C_MODE_START

static void option_error_reporter(enum loglevel level, const char *format, ...)
{
  va_list args;
  va_start(args, format);

  /* Don't print warnings for --loose options during bootstrap */
  if (level == ERROR_LEVEL || !opt_bootstrap ||
      (log_error_verbosity > 1))
  {
    error_log_print(level, format, args);
  }
  va_end(args);
}

/**
  Character set and collation error reporter that prints to sql error log.
  @param level          log message level
  @param format         log message format string

  This routine is used to print character set and collation
  warnings and errors inside an already running mysqld server,
  e.g. when a character set or collation is requested for the very first time
  and its initialization does not go well for some reasons.
*/
static void charset_error_reporter(enum loglevel level,
                                   const char *format, ...)
{
  va_list args;
  va_start(args, format);
  error_log_print(level, format, args);
  va_end(args);
}
C_MODE_END

struct rand_struct sql_rand; ///< used by sql_class.cc:THD::THD()

#ifndef EMBEDDED_LIBRARY
struct passwd *user_info= NULL;
#ifndef _WIN32
static my_thread_t main_thread_id;
#endif // !_WIN32
#endif // !EMBEDDED_LIBRARY

/* OS specific variables */

#ifdef _WIN32
#include <process.h>

static bool windows_service= false;
static bool use_opt_args;
static int opt_argc;
static char **opt_argv;

#if !defined(EMBEDDED_LIBRARY)
static mysql_mutex_t LOCK_handler_count;
static mysql_cond_t COND_handler_count;
static HANDLE hEventShutdown;
char *shared_memory_base_name= default_shared_memory_base_name;
my_bool opt_enable_shared_memory;
static char shutdown_event_name[40];
#include "nt_servc.h"
static   NTService  Service;        ///< Service object for WinNT
#endif /* EMBEDDED_LIBRARY */
#endif /* _WIN32 */

#ifndef EMBEDDED_LIBRARY
bool mysqld_embedded=0;
#else
bool mysqld_embedded=1;
#endif

static my_bool plugins_are_initialized= FALSE;

#ifndef NDEBUG
static const char* default_dbug_option;
#endif
ulong query_cache_min_res_unit= QUERY_CACHE_MIN_RESULT_DATA_SIZE;
my_bool opt_query_cache_strip_comments= FALSE;
Query_cache query_cache;

my_bool opt_use_ssl= 1;
char *opt_ssl_ca= NULL, *opt_ssl_capath= NULL, *opt_ssl_cert= NULL,
     *opt_ssl_cipher= NULL, *opt_ssl_key= NULL, *opt_ssl_crl= NULL,
     *opt_ssl_crlpath= NULL, *opt_tls_version= NULL;

#ifdef HAVE_OPENSSL
char *des_key_file;
#ifndef EMBEDDED_LIBRARY
struct st_VioSSLFd *ssl_acceptor_fd;
SSL *ssl_acceptor;
#endif
#endif /* HAVE_OPENSSL */

/* Function declarations */

extern "C" void *signal_hand(void *arg);
static int mysql_init_variables(void);
static int get_options(int *argc_ptr, char ***argv_ptr);
static void add_terminator(vector<my_option> *options);
extern "C" my_bool mysqld_get_one_option(int, const struct my_option *, char *);
static void set_server_version(void);
static int init_thread_environment();
static char *get_relative_path(const char *path);
static int fix_paths(void);
static bool read_init_file(char *file_name);
static void clean_up(bool print_message);
static int test_if_case_insensitive(const char *dir_name);
static void end_ssl();
static void start_processing_signals();

#ifndef EMBEDDED_LIBRARY
static bool pid_file_created= false;
static void usage(void);
static void clean_up_mutexes(void);
static void create_pid_file();
static void mysqld_exit(int exit_code) MY_ATTRIBUTE((noreturn));
static void delete_pid_file(myf flags);
#endif


#ifndef EMBEDDED_LIBRARY
/****************************************************************************
** Code to end mysqld
****************************************************************************/

/**
  This class implements callback function used by close_connections()
  to set KILL_CONNECTION flag on all thds in thd list.
  If m_kill_dump_thread_flag is not set it kills all other threads
  except dump threads. If this flag is set, it kills dump threads.
*/
class Set_kill_conn : public Do_THD_Impl
{
private:
  int m_dump_thread_count;
  bool m_kill_dump_threads_flag;
public:
  Set_kill_conn()
    : m_dump_thread_count(0),
      m_kill_dump_threads_flag(false)
  {}

  void set_dump_thread_flag()
  {
    m_kill_dump_threads_flag= true;
  }

  int get_dump_thread_count() const
  {
    return m_dump_thread_count;
  }

  virtual void operator()(THD *killing_thd)
  {
    DBUG_PRINT("quit",("Informing thread %u that it's time to die",
                       killing_thd->thread_id()));
    if (!m_kill_dump_threads_flag)
    {
      // We skip slave threads & scheduler on this first loop through.
      if (killing_thd->slave_thread)
        return;

      if (killing_thd->get_command() == COM_BINLOG_DUMP ||
          killing_thd->get_command() == COM_BINLOG_DUMP_GTID)
      {
        ++m_dump_thread_count;
        return;
      }
      DBUG_EXECUTE_IF("Check_dump_thread_is_alive",
                      {
                        assert(killing_thd->get_command() != COM_BINLOG_DUMP &&
                               killing_thd->get_command() != COM_BINLOG_DUMP_GTID);
                      };);
    }
    mysql_mutex_lock(&killing_thd->LOCK_thd_data);
    killing_thd->killed= THD::KILL_CONNECTION;
    MYSQL_CALLBACK(killing_thd->scheduler, post_kill_notification,
                   (killing_thd));
    if (killing_thd->is_killable)
    {
      mysql_mutex_lock(&killing_thd->LOCK_current_cond);
      if (killing_thd->current_cond)
      {
        mysql_mutex_lock(killing_thd->current_mutex);
        mysql_cond_broadcast(killing_thd->current_cond);
        mysql_mutex_unlock(killing_thd->current_mutex);
      }
      mysql_mutex_unlock(&killing_thd->LOCK_current_cond);
    }
    mysql_mutex_unlock(&killing_thd->LOCK_thd_data);
  }
};

/**
  This class implements callback function used by close_connections()
  to close vio connection for all thds in thd list
*/
class Call_close_conn : public Do_THD_Impl
{
public:
  Call_close_conn(bool server_shutdown) : is_server_shutdown(server_shutdown)
  {}

  virtual void operator()(THD *closing_thd)
  {
    if (closing_thd->get_protocol()->connection_alive())
    {
      LEX_CSTRING main_sctx_user= closing_thd->m_main_security_ctx.user();
      sql_print_warning(ER_DEFAULT(ER_FORCING_CLOSE),my_progname,
                        closing_thd->thread_id(),
                        (main_sctx_user.length ? main_sctx_user.str : ""));
      /*
        Do not generate MYSQL_AUDIT_CONNECTION_DISCONNECT event, when closing
        thread close sessions. Each session will generate DISCONNECT event by
        itself.
      */
      close_connection(closing_thd, 0, is_server_shutdown, false);
    }
  }
private:
  bool is_server_shutdown;
};

static void close_connections(void)
{
  DBUG_ENTER("close_connections");
  (void) RUN_HOOK(server_state, before_server_shutdown, (NULL));

  Per_thread_connection_handler::kill_blocked_pthreads();

  uint dump_thread_count= 0;
  uint dump_thread_kill_retries= 8;

  // Close listeners.
  if (mysqld_socket_acceptor != NULL)
    mysqld_socket_acceptor->close_listener();
#ifdef _WIN32
  if (named_pipe_acceptor != NULL)
    named_pipe_acceptor->close_listener();

  if (shared_mem_acceptor != NULL)
    shared_mem_acceptor->close_listener();
#endif

  /*
    First signal all threads that it's time to die
    This will give the threads some time to gracefully abort their
    statements and inform their clients that the server is about to die.
  */

  Global_THD_manager *thd_manager= Global_THD_manager::get_instance();
  sql_print_information("Giving %d client threads a chance to die gracefully",
                        static_cast<int>(thd_manager->get_thd_count()));

  Set_kill_conn set_kill_conn;
  thd_manager->do_for_all_thd(&set_kill_conn);
  sql_print_information("Shutting down slave threads");
  end_slave();

  if (set_kill_conn.get_dump_thread_count())
  {
    /*
      Replication dump thread should be terminated after the clients are
      terminated. Wait for few more seconds for other sessions to end.
     */
    while (thd_manager->get_thd_count() > dump_thread_count &&
           dump_thread_kill_retries)
    {
      sleep(1);
      dump_thread_kill_retries--;
    }
    set_kill_conn.set_dump_thread_flag();
    thd_manager->do_for_all_thd(&set_kill_conn);
  }
  if (thd_manager->get_thd_count() > 0)
    sleep(2);         // Give threads time to die

  /*
    Force remaining threads to die by closing the connection to the client
    This will ensure that threads that are waiting for a command from the
    client on a blocking read call are aborted.
  */

  sql_print_information("Forcefully disconnecting %d remaining clients",
                        static_cast<int>(thd_manager->get_thd_count()));

  Call_close_conn call_close_conn(true);
  thd_manager->do_for_all_thd(&call_close_conn);

  (void) RUN_HOOK(server_state, after_server_shutdown, (NULL));

  /*
    All threads have now been aborted. Stop event scheduler thread
    after aborting all client connections, otherwise user may
    start/stop event scheduler after Events::deinit() deallocates
    scheduler object(static member in Events class)
  */
  Events::deinit();
  DBUG_PRINT("quit",("Waiting for threads to die (count=%u)",
                     thd_manager->get_thd_count()));
  thd_manager->wait_till_no_thd();

  /*
    Connection threads might take a little while to go down after removing from
    global thread list. Give it some time.
  */
  Connection_handler_manager::wait_till_no_connection();

  delete_slave_info_objects();
  DBUG_PRINT("quit",("close_connections thread"));

  DBUG_VOID_RETURN;
}


void kill_mysql(void)
{
  DBUG_ENTER("kill_mysql");

#if defined(_WIN32)
  {
    if (!SetEvent(hEventShutdown))
    {
      DBUG_PRINT("error",("Got error: %ld from SetEvent",GetLastError()));
    }
    /*
      or:
      HANDLE hEvent=OpenEvent(0, FALSE, "MySqlShutdown");
      SetEvent(hEventShutdown);
      CloseHandle(hEvent);
    */
  }
#else
  if (pthread_kill(signal_thread_id.thread, SIGTERM))
  {
    DBUG_PRINT("error",("Got error %d from pthread_kill",errno)); /* purecov: inspected */
  }
#endif
  DBUG_PRINT("quit",("After pthread_kill"));
  DBUG_VOID_RETURN;
}


extern "C" void unireg_abort(int exit_code)
{
  DBUG_ENTER("unireg_abort");

  // At this point it does not make sense to buffer more messages.
  // Just flush what we have and write directly to stderr.
  flush_error_log_messages();

  if (opt_help)
    usage();
  if (exit_code)
    sql_print_error("Aborting\n");

  mysql_audit_notify(MYSQL_AUDIT_SERVER_SHUTDOWN_SHUTDOWN,
                     MYSQL_AUDIT_SERVER_SHUTDOWN_REASON_ABORT, exit_code);
#ifndef _WIN32
  if (signal_thread_id.thread != 0)
  {
    start_processing_signals();

    pthread_kill(signal_thread_id.thread, SIGTERM);
    my_thread_join(&signal_thread_id, NULL);
  }
  signal_thread_id.thread= 0;

  if (opt_daemonize)
  {
    mysqld::runtime::signal_parent(pipe_write_fd,0);
  }
#endif

  clean_up(!opt_help && (exit_code || !opt_bootstrap)); /* purecov: inspected */
  DBUG_PRINT("quit",("done with cleanup in unireg_abort"));
  mysqld_exit(exit_code);
}

static void mysqld_exit(int exit_code)
{
  assert(exit_code >= MYSQLD_SUCCESS_EXIT
         && exit_code <= MYSQLD_FAILURE_EXIT);
  mysql_audit_finalize();
#ifndef EMBEDDED_LIBRARY
  Srv_session::module_deinit();
#endif
  delete_optimizer_cost_module();
  clean_up_mutexes();
  my_end(opt_endinfo ? MY_CHECK_ERROR | MY_GIVE_INFO : 0);
  destroy_error_log();
#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
  shutdown_performance_schema();
#endif
#if defined(_WIN32)
  if (Service.IsNT() && windows_service)
  {
    Service.Stop();
  }
  else
  {
    Service.SetShutdownEvent(0);
    if (hEventShutdown)
      CloseHandle(hEventShutdown);
  }
#endif
  exit(exit_code); /* purecov: inspected */
}

#endif /* !EMBEDDED_LIBRARY */

/**
   GTID cleanup destroys objects and reset their pointer.
   Function is reentrant.
*/
void gtid_server_cleanup()
{
  if (gtid_state != NULL)
  {
    delete gtid_state;
    gtid_state= NULL;
  }
  if (global_sid_map != NULL)
  {
    delete global_sid_map;
    global_sid_map= NULL;
  }
  if (global_sid_lock != NULL)
  {
    delete global_sid_lock;
    global_sid_lock= NULL;
  }
  if (gtid_table_persistor != NULL)
  {
    delete gtid_table_persistor;
    gtid_table_persistor= NULL;
  }
  if (gtid_mode_lock)
  {
    delete gtid_mode_lock;
    gtid_mode_lock= NULL;
  }
}

/**
   GTID initialization.

   @return true if allocation does not succeed
           false if OK
*/
bool gtid_server_init()
{
  bool res=
    (!(global_sid_lock= new Checkable_rwlock(
#ifdef HAVE_PSI_INTERFACE
                                             key_rwlock_global_sid_lock
#endif
                                            )) ||
     !(gtid_mode_lock= new Checkable_rwlock(
#ifdef HAVE_PSI_INTERFACE
                                            key_rwlock_gtid_mode_lock
#endif
                                           )) ||
     !(global_sid_map= new Sid_map(global_sid_lock)) ||
     !(gtid_state= new Gtid_state(global_sid_lock, global_sid_map))||
     !(gtid_table_persistor= new Gtid_table_persistor()));
  if (res)
  {
    gtid_server_cleanup();
  }
  return res;
}

#ifndef EMBEDDED_LIBRARY
// Free connection acceptors
static void free_connection_acceptors()
{
  delete mysqld_socket_acceptor;
  mysqld_socket_acceptor= NULL;

#ifdef _WIN32
  delete named_pipe_acceptor;
  named_pipe_acceptor= NULL;
  delete shared_mem_acceptor;
  shared_mem_acceptor= NULL;
#endif
}
#endif


void clean_up(bool print_message)
{
  DBUG_PRINT("exit",("clean_up"));
  if (cleanup_done++)
    return; /* purecov: inspected */

  stop_handle_manager();
  release_ddl_log();

  memcached_shutdown();

  /*
    make sure that handlers finish up
    what they have that is dependent on the binlog
  */
  if ((opt_help == 0) || (opt_verbose > 0))
    sql_print_information("Binlog end");
  ha_binlog_end(current_thd);

  injector::free_instance();
  mysql_bin_log.cleanup();
  gtid_server_cleanup();

#ifdef HAVE_REPLICATION
  if (use_slave_mask)
    bitmap_free(&slave_error_mask);
#endif
  my_tz_free();
  my_dboptions_cache_free();
  ignore_db_dirs_free();
  servers_free(1);
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  acl_free(1);
  grant_free();
#endif
  query_cache.destroy();
  hostname_cache_free();
  item_func_sleep_free();
  lex_free();       /* Free some memory */
  item_create_cleanup();
  if (!opt_noacl)
  {
#ifdef HAVE_DLOPEN
    udf_free();
#endif
  }
  table_def_start_shutdown();
  delegates_shutdown();
  plugin_shutdown();
  delete_optimizer_cost_module();
  ha_end();
  if (tc_log)
  {
    tc_log->close();
    tc_log= NULL;
  }
  delegates_destroy();
  transaction_cache_free();
  table_def_free();
  mdl_destroy();
  key_caches.delete_elements((void (*)(const char*, uchar*)) free_key_cache);
  multi_keycache_free();
  free_status_vars();
  query_logger.cleanup();
  my_free_open_file_info();
  if (defaults_argv)
    free_defaults(defaults_argv);
  free_tmpdir(&mysql_tmpdir_list);
  my_free(opt_bin_logname);
  bitmap_free(&temp_pool);
  free_max_user_conn();
#ifndef EMBEDDED_LIBRARY
  free_global_user_stats();
  free_global_client_stats();
  free_global_thread_stats();
  free_global_table_stats();
  free_global_index_stats();
#endif
#ifdef HAVE_REPLICATION
  end_slave_list();
#endif
  delete binlog_filter;
  delete rpl_filter;
  end_ssl();
  vio_end();
  my_regex_end();
#if defined(ENABLED_DEBUG_SYNC)
  /* End the debug sync facility. See debug_sync.cc. */
  debug_sync_end();
#endif /* defined(ENABLED_DEBUG_SYNC) */

#ifndef EMBEDDED_LIBRARY
  delete_pid_file(MYF(0));
#endif

  if (print_message && my_default_lc_messages && server_start_time)
    sql_print_information(ER_DEFAULT(ER_SHUTDOWN_COMPLETE),my_progname);
  cleanup_errmsgs();

#ifndef EMBEDDED_LIBRARY
  free_connection_acceptors();
  Connection_handler_manager::destroy_instance();
#endif

  mysql_client_plugin_deinit();
  finish_client_errs();
  deinit_errmessage(); // finish server errs
  DBUG_PRINT("quit", ("Error messages freed"));

  free_charsets();
  sys_var_end();
  Global_THD_manager::destroy_instance();

  my_free(const_cast<char*>(log_bin_basename));
  my_free(const_cast<char*>(log_bin_index));
#ifndef EMBEDDED_LIBRARY
  my_free(const_cast<char*>(relay_log_basename));
  my_free(const_cast<char*>(relay_log_index));
#endif
  free_list(opt_early_plugin_load_list_ptr);
  free_list(opt_plugin_load_list_ptr);

  if (THR_THD_initialized)
  {
    THR_THD_initialized= false;
    (void) my_delete_thread_local_key(THR_THD);
  }

  if (THR_MALLOC_initialized)
  {
    THR_MALLOC_initialized= false;
    (void) my_delete_thread_local_key(THR_MALLOC);
  }

  if (have_statement_timeout == SHOW_OPTION_YES)
    my_timer_deinitialize();

  have_statement_timeout= SHOW_OPTION_DISABLED;

  my_handle_options_end();
  log_syslog_exit();

  /*
    The following lines may never be executed as the main thread may have
    killed us
  */
  DBUG_PRINT("quit", ("done with cleanup"));
} /* clean_up */


#ifndef EMBEDDED_LIBRARY

static void clean_up_mutexes()
{
  mysql_mutex_destroy(&LOCK_log_throttle_qni);
  mysql_mutex_destroy(&LOCK_status);
  mysql_mutex_destroy(&LOCK_manager);
  mysql_mutex_destroy(&LOCK_crypt);
  mysql_mutex_destroy(&LOCK_user_conn);
#ifdef HAVE_OPENSSL
  mysql_mutex_destroy(&LOCK_des_key_file);
#endif
  mysql_rwlock_destroy(&LOCK_sys_init_connect);
  mysql_rwlock_destroy(&LOCK_sys_init_slave);
  mysql_mutex_destroy(&LOCK_global_system_variables);
  mysql_rwlock_destroy(&LOCK_system_variables_hash);
  mysql_mutex_destroy(&LOCK_uuid_generator);
  mysql_mutex_destroy(&LOCK_sql_rand);
  mysql_mutex_destroy(&LOCK_prepared_stmt_count);
  mysql_mutex_destroy(&LOCK_sql_slave_skip_counter);
  mysql_mutex_destroy(&LOCK_slave_net_timeout);
  mysql_mutex_destroy(&LOCK_slave_trans_dep_tracker);
  mysql_mutex_destroy(&LOCK_error_messages);
  mysql_mutex_destroy(&LOCK_offline_mode);
  mysql_mutex_destroy(&LOCK_default_password_lifetime);
  mysql_cond_destroy(&COND_manager);
#ifdef _WIN32
  mysql_cond_destroy(&COND_handler_count);
  mysql_mutex_destroy(&LOCK_handler_count);
  mysql_rwlock_destroy(&LOCK_named_pipe_full_access_group);
#endif
#ifndef _WIN32
  mysql_cond_destroy(&COND_socket_listener_active);
  mysql_mutex_destroy(&LOCK_socket_listener_active);
  mysql_cond_destroy(&COND_start_signal_handler);
  mysql_mutex_destroy(&LOCK_start_signal_handler);
#endif
  mysql_mutex_destroy(&LOCK_keyring_operations);
  mysql_mutex_destroy(&LOCK_global_user_client_stats);
  mysql_mutex_destroy(&LOCK_global_table_stats);
  mysql_mutex_destroy(&LOCK_global_index_stats);
  mysql_rwlock_destroy(&LOCK_consistent_snapshot);
}


/****************************************************************************
** Init IP and UNIX socket
****************************************************************************/

/* Initialise proxy protocol. */
static void set_proxy()
{
  const char *p;
  struct st_vio_network net;

  if (opt_disable_networking)
    return;

  /* Check for special case '*'. */
  if (strcmp(my_proxy_protocol_networks, "*") == 0) {
    memset(&net, 0, sizeof(net));
    net.family= AF_INET;
    vio_proxy_protocol_add(&net);
#ifdef HAVE_IPV6
    net.family= AF_INET6;
    vio_proxy_protocol_add(&net);
#endif
    return;
  }

  p= my_proxy_protocol_networks;

  while(1) {

    const char *start;
    char buffer[INET6_ADDRSTRLEN + 1 + 3 + 1];
    unsigned bits;

    /* jump spaces. */
    while (*p == ' ')
      p++;
    if (*p == '\0')
      break;
    start= p;

    /* look for separator */
    while (*p != ',' && *p != '/' && *p != ' ' && *p != '\0')
      p++;
    if (p - start > INET6_ADDRSTRLEN) {
      sql_print_error("Too long network in 'proxy_protocol_networks' "
                      "directive.");
      unireg_abort(1);
    }
    memcpy(buffer, start, p - start);
    buffer[p - start]= '\0';

    /* Try to convert to ipv4. */
    if (inet_pton(AF_INET, buffer, &net.addr.in))
      net.family= AF_INET;

#ifdef HAVE_IPV6
    /* Try to convert to ipv6. */
    else if (inet_pton(AF_INET6, buffer, &net.addr.in6))
      net.family= AF_INET6;
#endif

    else {
      sql_print_error("Bad network '%s' in 'proxy_protocol_networks' "
                      "directive.", buffer);
      unireg_abort(1);
    }

    /* Look for network. */
    if (*p == '/') {
      if (!my_isdigit(&my_charset_bin, *++p)) {
        sql_print_error("Missing network prefix in 'proxy_protocol_networks' "
                        "directive.");
        unireg_abort(1);
      }
      start= p;
      bits= 0;
      while (my_isdigit(&my_charset_bin, *p) && p - start < 3)
        bits= bits * 10 + *p++ - '0';

      /* Check bits value. */
      if (net.family == AF_INET && bits > 32) {
        sql_print_error("Bad IPv4 mask in 'proxy_protocol_networks' "
                        "directive.");
        unireg_abort(1);
      }
#ifdef HAVE_IPV6
      if (net.family == AF_INET6 && bits > 128) {
        sql_print_error("Bad IPv6 mask in 'proxy_protocol_networks' "
                        "directive.");
        unireg_abort(1);
      }
#endif
    }
    else {
      if (net.family == AF_INET)
        bits= 32;
#ifdef HAVE_IPV6
      else {
        assert(net.family == AF_INET6);
        bits= 128;
      }
#endif
    }

    /* Build binary mask. */
    if (net.family == AF_INET) {

      /* Process IPv4 mask. */
      if (bits == 0)
        net.mask.in.s_addr= 0x00000000;
      else if (bits == 32)
        net.mask.in.s_addr= 0xffffffff;
      else
        net.mask.in.s_addr= ~((0x80000000>>(bits-1))-1);
      net.mask.in.s_addr= htonl(net.mask.in.s_addr);

      /* Apply mask */
      struct in_addr check= net.addr.in;
      check.s_addr&= net.mask.in.s_addr;

      /* Check network. */
      if (check.s_addr != net.addr.in.s_addr)
        sql_print_warning("The network mask hides a part of the address for "
                          "'%s/%d' in 'proxy_protocol_networks' directive.",
                          buffer, bits);
    }
#ifdef HAVE_IPV6
    else {

      /* Process IPv6 mask */
      memset(&net.mask.in6, 0, sizeof(net.mask.in6));
      if (bits > 0 && bits < 32) {
        net.mask.in6.s6_addr32[0]= ~((0x80000000>>(bits-1))-1);
      }
      else if (bits == 32) {
        net.mask.in6.s6_addr32[0]= 0xffffffff;
      }
      else if (bits > 32 && bits <= 64) {
        net.mask.in6.s6_addr32[0]= 0xffffffff;
        net.mask.in6.s6_addr32[1]= (bits == 64)
          ? 0xffffffff : ~((0x80000000>>(bits-32-1))-1);
      }
      else if (bits > 64 && bits <= 96) {
        net.mask.in6.s6_addr32[0]= 0xffffffff;
        net.mask.in6.s6_addr32[1]= 0xffffffff;
        net.mask.in6.s6_addr32[2]= (bits == 96)
          ? 0xffffffff : ~((0x80000000>>(bits-64-1))-1);
      }
      else if (bits > 96) {
        assert(bits <= 128);
        net.mask.in6.s6_addr32[0]= 0xffffffff;
        net.mask.in6.s6_addr32[1]= 0xffffffff;
        net.mask.in6.s6_addr32[2]= 0xffffffff;
        net.mask.in6.s6_addr32[3]= (bits == 128)
          ? 0xffffffff : ~((0x80000000>>(bits-96-1))-1);
      }

      net.mask.in6.s6_addr32[0]= htonl(net.mask.in6.s6_addr32[0]);
      net.mask.in6.s6_addr32[1]= htonl(net.mask.in6.s6_addr32[1]);
      net.mask.in6.s6_addr32[2]= htonl(net.mask.in6.s6_addr32[2]);
      net.mask.in6.s6_addr32[3]= htonl(net.mask.in6.s6_addr32[3]);

      /* Apply mask */
      struct in6_addr check= net.addr.in6;
      check.s6_addr32[0]&= net.mask.in6.s6_addr32[0];
      check.s6_addr32[1]&= net.mask.in6.s6_addr32[1];
      check.s6_addr32[2]&= net.mask.in6.s6_addr32[2];
      check.s6_addr32[3]&= net.mask.in6.s6_addr32[3];

      /* Check network. */
      if (memcmp(check.s6_addr, net.addr.in6.s6_addr, 16))
      {
        sql_print_warning("The network mask hides a part of the address for "
                          "'%s/%d' in 'proxy_protocol_networks' directive.",
                          buffer, bits);
      }
    }
#endif

    if (*p != '\0' && *p != ',') {
      sql_print_error("Bad syntax in 'proxy_protocol_networks' directive.");
      unireg_abort(1);
    }

    /* add network. */
    vio_proxy_protocol_add(&net);

    /* stop the parsing. */
    if (*p == '\0')
      break;
    p++;
  }
}

static void set_ports()
{
  char  *env;
  if (!mysqld_port && !opt_disable_networking)
  {         // Get port if not from commandline
    mysqld_port= MYSQL_PORT;

    /*
      if builder specifically requested a default port, use that
      (even if it coincides with our factory default).
      only if they didn't do we check /etc/services (and, failing
      on that, fall back to the factory default of 3306).
      either default can be overridden by the environment variable
      MYSQL_TCP_PORT, which in turn can be overridden with command
      line options.
    */

#if MYSQL_PORT_DEFAULT == 0
    struct  servent *serv_ptr;
    if ((serv_ptr= getservbyname("mysql", "tcp")))
      mysqld_port= ntohs((u_short) serv_ptr->s_port); /* purecov: inspected */
#endif
    if ((env = getenv("MYSQL_TCP_PORT")))
      mysqld_port= (uint) atoi(env);    /* purecov: inspected */
  }
  if (!mysqld_unix_port)
  {
#ifdef _WIN32
    mysqld_unix_port= (char*) MYSQL_NAMEDPIPE;
#else
    mysqld_unix_port= (char*) MYSQL_UNIX_ADDR;
#endif
    if ((env = getenv("MYSQL_UNIX_PORT")))
      mysqld_unix_port= env;      /* purecov: inspected */
  }
}


#if !defined(_WIN32)
/* Change to run as another user if started with --user */

static struct passwd *check_user(const char *user)
{
  struct passwd *tmp_user_info;
  uid_t user_id= geteuid();

  // Don't bother if we aren't superuser
  if (user_id)
  {
    if (user)
    {
      /* Don't give a warning, if real user is same as given with --user */
      tmp_user_info= getpwnam(user);
      if ((!tmp_user_info || user_id != tmp_user_info->pw_uid))
        sql_print_warning(
                    "One can only use the --user switch if running as root\n");
    }
    return NULL;
  }
  if (!user)
  {
    if (!opt_bootstrap && !opt_help)
    {
      sql_print_error("Fatal error: Please read \"Security\" section of the manual to find out how to run mysqld as root!\n");
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
    return NULL;
  }
  /* purecov: begin tested */
  if (!strcmp(user,"root"))
    return NULL;                        // Avoid problem with dynamic libraries

  if (!(tmp_user_info= getpwnam(user)))
  {
    // Allow a numeric uid to be used
    const char *pos;
    for (pos= user; my_isdigit(mysqld_charset,*pos); pos++) ;
    if (*pos)                                   // Not numeric id
      goto err;
    if (!(tmp_user_info= getpwuid(atoi(user))))
      goto err;
  }
  return tmp_user_info;
  /* purecov: end */

err:
  sql_print_error("Fatal error: Can't change to run as user '%s' ;  Please check that the user exists!\n",user);
  unireg_abort(MYSQLD_ABORT_EXIT);

#ifdef PR_SET_DUMPABLE
  if (test_flags & TEST_CORE_ON_SIGNAL)
  {
    /* inform kernel that process is dumpable */
    (void) prctl(PR_SET_DUMPABLE, 1);
  }
#endif

  return NULL;
}

static void set_user(const char *user, struct passwd *user_info_arg)
{
  /* purecov: begin tested */
  assert(user_info_arg != 0);
#ifdef HAVE_INITGROUPS
  /*
    We can get a SIGSEGV when calling initgroups() on some systems when NSS
    is configured to use LDAP and the server is statically linked.  We set
    calling_initgroups as a flag to the SIGSEGV handler that is then used to
    output a specific message to help the user resolve this problem.
  */
  calling_initgroups= 1;
  initgroups((char*) user, user_info_arg->pw_gid);
  calling_initgroups= 0;
#endif
  if (setgid(user_info_arg->pw_gid) == -1)
  {
    sql_print_error("setgid: %s", strerror(errno));
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  if (setuid(user_info_arg->pw_uid) == -1)
  {
    sql_print_error("setuid: %s", strerror(errno));
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  /* purecov: end */
}


static void set_effective_user(struct passwd *user_info_arg)
{
  assert(user_info_arg != 0);
  if (setregid((gid_t)-1, user_info_arg->pw_gid) == -1)
  {
    sql_print_error("setregid: %s", strerror(errno));
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  if (setreuid((uid_t)-1, user_info_arg->pw_uid) == -1)
  {
    sql_print_error("setreuid: %s", strerror(errno));
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
}


/** Change root user if started with @c --chroot . */
static void set_root(const char *path)
{
  if (chroot(path) == -1)
  {
    sql_print_error("chroot: %s", strerror(errno));
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  my_setwd("/", MYF(0));
}
#endif // !_WIN32


static bool network_init(void)
{
  if (opt_bootstrap)
    return false;

  set_ports();

  set_proxy();
#ifdef HAVE_SYS_UN_H
  std::string const unix_sock_name(mysqld_unix_port ? mysqld_unix_port : "");
#else
  std::string const unix_sock_name("");
#endif

  if (!opt_disable_networking || unix_sock_name != "")
  {
    std::string const bind_addr_str(my_bind_addr_str ? my_bind_addr_str : "");

    Mysqld_socket_listener *mysqld_socket_listener=
      new (std::nothrow) Mysqld_socket_listener(bind_addr_str,
                                                mysqld_port, mysqld_extra_port,
                                                back_log, mysqld_port_timeout,
                                                unix_sock_name);
    if (mysqld_socket_listener == NULL)
      return true;

    mysqld_socket_acceptor=
      new (std::nothrow) Connection_acceptor<Mysqld_socket_listener>(mysqld_socket_listener);
    if (mysqld_socket_acceptor == NULL)
    {
      delete mysqld_socket_listener;
      mysqld_socket_listener= NULL;
      return true;
    }

    if (mysqld_socket_acceptor->init_connection_acceptor())
      return true; // mysqld_socket_acceptor would be freed in unireg_abort.

    if (report_port == 0)
      report_port= mysqld_port;

    if (!opt_disable_networking)
      assert(report_port != 0);
  }
#ifdef _WIN32
  // Create named pipe
  if (opt_enable_named_pipe)
  {
    std::string pipe_name= mysqld_unix_port ? mysqld_unix_port : "";

    named_pipe_listener= new (std::nothrow) Named_pipe_listener(&pipe_name);
    if (named_pipe_listener == NULL)
      return true;

    named_pipe_acceptor=
      new (std::nothrow) Connection_acceptor<Named_pipe_listener>(named_pipe_listener);
    if (named_pipe_acceptor == NULL)
    {
      delete named_pipe_listener;
      named_pipe_listener= NULL;
      return true;
    }

    if (named_pipe_acceptor->init_connection_acceptor())
      return true; // named_pipe_acceptor would be freed in unireg_abort.
  }

  // Setup shared_memory acceptor
  if (opt_enable_shared_memory)
  {
    std::string shared_mem_base_name= shared_memory_base_name ? shared_memory_base_name : "";

    Shared_mem_listener *shared_mem_listener=
      new (std::nothrow) Shared_mem_listener(&shared_mem_base_name);
    if (shared_mem_listener == NULL)
      return true;

    shared_mem_acceptor=
      new (std::nothrow) Connection_acceptor<Shared_mem_listener>(shared_mem_listener);
    if (shared_mem_acceptor == NULL)
    {
      delete shared_mem_listener;
      shared_mem_listener= NULL;
      return true;
    }

    if (shared_mem_acceptor->init_connection_acceptor())
      return true; // shared_mem_acceptor would be freed in unireg_abort.
  }
#endif // _WIN32
  return false;
}

#ifdef _WIN32
static uint handler_count= 0;


static inline void decrement_handler_count()
{
  mysql_mutex_lock(&LOCK_handler_count);
  handler_count--;
  mysql_cond_signal(&COND_handler_count);
  mysql_mutex_unlock(&LOCK_handler_count);
}


extern "C" void *socket_conn_event_handler(void *arg)
{
  my_thread_init();

  Connection_acceptor<Mysqld_socket_listener> *conn_acceptor=
    static_cast<Connection_acceptor<Mysqld_socket_listener>*>(arg);
  conn_acceptor->connection_event_loop();

  decrement_handler_count();
  my_thread_end();
  return 0;
}


extern "C" void *named_pipe_conn_event_handler(void *arg)
{
  my_thread_init();

  Connection_acceptor<Named_pipe_listener> *conn_acceptor=
    static_cast<Connection_acceptor<Named_pipe_listener>*>(arg);
  conn_acceptor->connection_event_loop();

  decrement_handler_count();
  my_thread_end();
  return 0;
}


extern "C" void *shared_mem_conn_event_handler(void *arg)
{
  my_thread_init();

  Connection_acceptor<Shared_mem_listener> *conn_acceptor=
    static_cast<Connection_acceptor<Shared_mem_listener>*>(arg);
  conn_acceptor->connection_event_loop();

  decrement_handler_count();
  my_thread_end();
  return 0;
}


void setup_conn_event_handler_threads()
{
  my_thread_handle hThread;

  DBUG_ENTER("handle_connections_methods");

  if ((!have_tcpip || opt_disable_networking) &&
      !opt_enable_shared_memory && !opt_enable_named_pipe)
  {
    sql_print_error("TCP/IP, --shared-memory, or --named-pipe should be configured on NT OS");
    unireg_abort(MYSQLD_ABORT_EXIT);        // Will not return
  }

  mysql_mutex_lock(&LOCK_handler_count);
  handler_count=0;

  if (opt_enable_named_pipe)
  {
    int error= mysql_thread_create(key_thread_handle_con_namedpipes,
                                   &hThread, &connection_attrib,
                                   named_pipe_conn_event_handler,
                                   named_pipe_acceptor);
    if (!error)
      handler_count++;
    else
      sql_print_warning("Can't create thread to handle named pipes"
                        " (errno= %d)", error);
  }

  if (have_tcpip && !opt_disable_networking)
  {
    int error= mysql_thread_create(key_thread_handle_con_sockets,
                                   &hThread, &connection_attrib,
                                   socket_conn_event_handler,
                                   mysqld_socket_acceptor);
    if (!error)
      handler_count++;
    else
      sql_print_warning("Can't create thread to handle TCP/IP (errno= %d)",
                        error);
  }

  if (opt_enable_shared_memory)
  {
    int error= mysql_thread_create(key_thread_handle_con_sharedmem,
                                   &hThread, &connection_attrib,
                                   shared_mem_conn_event_handler,
                                   shared_mem_acceptor);
    if (!error)
      handler_count++;
    else
      sql_print_warning("Can't create thread to handle shared memory"
                        " (errno= %d)", error);
  }

  // Block until all connection listener threads have exited.
  while (handler_count > 0)
    mysql_cond_wait(&COND_handler_count, &LOCK_handler_count);
  mysql_mutex_unlock(&LOCK_handler_count);
  DBUG_VOID_RETURN;
}


/*
  On Windows, we use native SetConsoleCtrlHandler for handle events like Ctrl-C
  with graceful shutdown.
  Also, we do not use signal(), but SetUnhandledExceptionFilter instead - as it
  provides possibility to pass the exception to just-in-time debugger, collect
  dumps and potentially also the exception and thread context used to output
  callstack.
*/

static BOOL WINAPI console_event_handler( DWORD type )
{
  DBUG_ENTER("console_event_handler");
  if(type == CTRL_C_EVENT)
  {
     /*
       Do not shutdown before startup is finished and shutdown
       thread is initialized. Otherwise there is a race condition
       between main thread doing initialization and CTRL-C thread doing
       cleanup, which can result into crash.
     */
     if(hEventShutdown)
       kill_mysql();
     else
       sql_print_warning("CTRL-C ignored during startup");
     DBUG_RETURN(TRUE);
  }
  DBUG_RETURN(FALSE);
}


#ifdef DEBUG_UNHANDLED_EXCEPTION_FILTER
#define DEBUGGER_ATTACH_TIMEOUT 120
/*
  Wait for debugger to attach and break into debugger. If debugger is not attached,
  resume after timeout.
*/
static void wait_for_debugger(int timeout_sec)
{
   if(!IsDebuggerPresent())
   {
     int i;
     printf("Waiting for debugger to attach, pid=%u\n",GetCurrentProcessId());
     fflush(stdout);
     for(i= 0; i < timeout_sec; i++)
     {
       Sleep(1000);
       if(IsDebuggerPresent())
       {
         /* Break into debugger */
         __debugbreak();
         return;
       }
     }
     printf("pid=%u, debugger not attached after %d seconds, resuming\n",GetCurrentProcessId(),
       timeout_sec);
     fflush(stdout);
   }
}
#endif /* DEBUG_UNHANDLED_EXCEPTION_FILTER */

LONG WINAPI my_unhandler_exception_filter(EXCEPTION_POINTERS *ex_pointers)
{
   static BOOL first_time= TRUE;
   if(!first_time)
   {
     /*
       This routine can be called twice, typically
       when detaching in JIT debugger.
       Return EXCEPTION_EXECUTE_HANDLER to terminate process.
     */
     return EXCEPTION_EXECUTE_HANDLER;
   }
   first_time= FALSE;
#ifdef DEBUG_UNHANDLED_EXCEPTION_FILTER
   /*
    Unfortunately there is no clean way to debug unhandled exception filters,
    as debugger does not stop there(also documented in MSDN)
    To overcome, one could put a MessageBox, but this will not work in service.
    Better solution is to print error message and sleep some minutes
    until debugger is attached
  */
  wait_for_debugger(DEBUGGER_ATTACH_TIMEOUT);
#endif /* DEBUG_UNHANDLED_EXCEPTION_FILTER */
  __try
  {
    my_set_exception_pointers(ex_pointers);
    handle_fatal_signal(ex_pointers->ExceptionRecord->ExceptionCode);
  }
  __except(EXCEPTION_EXECUTE_HANDLER)
  {
    DWORD written;
    const char msg[] = "Got exception in exception handler!\n";
    WriteFile(GetStdHandle(STD_OUTPUT_HANDLE),msg, sizeof(msg)-1,
      &written,NULL);
  }
  /*
    Return EXCEPTION_CONTINUE_SEARCH to give JIT debugger
    (drwtsn32 or vsjitdebugger) possibility to attach,
    if JIT debugger is configured.
    Windows Error reporting might generate a dump here.
  */
  return EXCEPTION_CONTINUE_SEARCH;
}


void my_init_signals()
{
  if(opt_console)
    SetConsoleCtrlHandler(console_event_handler,TRUE);

    /* Avoid MessageBox()es*/
  _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
  _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE);
  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);

   /*
     Do not use SEM_NOGPFAULTERRORBOX in the following SetErrorMode (),
     because it would prevent JIT debugger and Windows error reporting
     from working. We need WER or JIT-debugging, since our own unhandled
     exception filter is not guaranteed to work in all situation
     (like heap corruption or stack overflow)
   */
  SetErrorMode(SetErrorMode(0) | SEM_FAILCRITICALERRORS
                               | SEM_NOOPENFILEERRORBOX);
  SetUnhandledExceptionFilter(my_unhandler_exception_filter);
}

#else // !_WIN32

extern "C" {
static void empty_signal_handler(int sig MY_ATTRIBUTE((unused)))
{ }
}


void my_init_signals()
{
  DBUG_ENTER("my_init_signals");
  struct sigaction sa;
  (void) sigemptyset(&sa.sa_mask);

  if (!(test_flags & TEST_NO_STACKTRACE) || (test_flags & TEST_CORE_ON_SIGNAL))
  {
#ifdef HAVE_STACKTRACE
    my_init_stacktrace();
#endif

    if (test_flags & TEST_CORE_ON_SIGNAL)
    {
      // Change limits so that we will get a core file.
      struct rlimit rl;
      rl.rlim_cur= rl.rlim_max= RLIM_INFINITY;
      if (setrlimit(RLIMIT_CORE, &rl))
        sql_print_warning("setrlimit could not change the size of core files to"
                          " 'infinity';  We may not be able to generate a"
                          " core file on signals");
    }

    /*
      SA_RESETHAND resets handler action to default when entering handler.
      SA_NODEFER allows receiving the same signal during handler.
      E.g. SIGABRT during our signal handler will dump core (default action).
    */
    sa.sa_flags= SA_RESETHAND | SA_NODEFER;
    sa.sa_handler= handle_fatal_signal;
    // Treat all these as fatal and handle them.
    (void) sigaction(SIGSEGV, &sa, NULL);
    (void) sigaction(SIGABRT, &sa, NULL);
    (void) sigaction(SIGBUS, &sa, NULL);
    (void) sigaction(SIGILL, &sa, NULL);
    (void) sigaction(SIGFPE, &sa, NULL);
  }

  // Ignore SIGPIPE and SIGALRM
  sa.sa_flags= 0;
  sa.sa_handler= SIG_IGN;
  (void) sigaction(SIGPIPE, &sa, NULL);
  (void) sigaction(SIGALRM, &sa, NULL);

  // SIGUSR1 is used to interrupt the socket listener.
  sa.sa_handler= empty_signal_handler;
  (void) sigaction(SIGUSR1, &sa, NULL);

  // Fix signals if ignored by parents (can happen on Mac OS X).
  sa.sa_handler= SIG_DFL;
  (void) sigaction(SIGTERM, &sa, NULL);
  (void) sigaction(SIGHUP, &sa, NULL);

  sigset_t set;
  (void) sigemptyset(&set);
  /*
    Block SIGQUIT, SIGHUP and SIGTERM.
    The signal handler thread does sigwait() on these.
  */
  (void) sigaddset(&set, SIGQUIT);
  (void) sigaddset(&set, SIGHUP);
  (void) sigaddset(&set, SIGTERM);
  (void) sigaddset(&set, SIGTSTP);
  /*
    Block SIGINT unless debugging to prevent Ctrl+C from causing
    unclean shutdown of the server.
  */
  if (!(test_flags & TEST_SIGINT))
    (void) sigaddset(&set, SIGINT);
  pthread_sigmask(SIG_SETMASK, &set, NULL);
  DBUG_VOID_RETURN;
}


static void start_signal_handler()
{
  int error;
  my_thread_attr_t thr_attr;
  DBUG_ENTER("start_signal_handler");

  (void) my_thread_attr_init(&thr_attr);
  (void) pthread_attr_setscope(&thr_attr, PTHREAD_SCOPE_SYSTEM);
  (void) my_thread_attr_setdetachstate(&thr_attr, MY_THREAD_CREATE_JOINABLE);

  size_t guardize= 0;
  (void) pthread_attr_getguardsize(&thr_attr, &guardize);
#if defined(__ia64__) || defined(__ia64)
  /*
    Peculiar things with ia64 platforms - it seems we only have half the
    stack size in reality, so we have to double it here
  */
  guardize= my_thread_stack_size;
#endif
  (void) my_thread_attr_setstacksize(&thr_attr, my_thread_stack_size + guardize);

  /*
    Set main_thread_id so that SIGTERM/SIGQUIT/SIGKILL can interrupt
    the socket listener successfully.
  */
  main_thread_id= my_thread_self();

  mysql_mutex_lock(&LOCK_start_signal_handler);
  if ((error=
       mysql_thread_create(key_thread_signal_hand,
                           &signal_thread_id, &thr_attr, signal_hand, 0)))
  {
    sql_print_error("Can't create interrupt-thread (error %d, errno: %d)",
                    error, errno);
    flush_error_log_messages();
    exit(MYSQLD_ABORT_EXIT);
  }
  mysql_cond_wait(&COND_start_signal_handler, &LOCK_start_signal_handler);
  mysql_mutex_unlock(&LOCK_start_signal_handler);

  (void) my_thread_attr_destroy(&thr_attr);
  DBUG_VOID_RETURN;
}


/** This thread handles SIGTERM, SIGQUIT and SIGHUP signals. */
/* ARGSUSED */
extern "C" void *signal_hand(void *arg MY_ATTRIBUTE((unused)))
{
  my_thread_init();

  sigset_t set;
  (void) sigemptyset(&set);
  (void) sigaddset(&set, SIGTERM);
  (void) sigaddset(&set, SIGQUIT);
  (void) sigaddset(&set, SIGHUP);

  /*
    Signal to start_signal_handler that we are ready.
    This works by waiting for start_signal_handler to free mutex,
    after which we signal it that we are ready.
  */
  mysql_mutex_lock(&LOCK_start_signal_handler);
  mysql_cond_broadcast(&COND_start_signal_handler);
  mysql_mutex_unlock(&LOCK_start_signal_handler);

  /*
    Waiting until mysqld_server_started == true to ensure that all server
    components have been successfully initialized. This step is mandatory
    since signal processing can be done safely only when all server components
    have been initialized.
  */
  mysql_mutex_lock(&LOCK_server_started);
  while (!mysqld_server_started)
    mysql_cond_wait(&COND_server_started, &LOCK_server_started);
  mysql_mutex_unlock(&LOCK_server_started);

  for (;;)
  {
    int sig;
    while (sigwait(&set, &sig) == EINTR)
    {}
    if (cleanup_done)
    {
      my_thread_end();
      my_thread_exit(0);      // Safety
      return NULL;            // Avoid compiler warnings
    }
    switch (sig) {
    case SIGTERM:
    case SIGQUIT:
      // Switch to the file log message processing.
      query_logger.set_handlers((log_output_options != LOG_NONE) ?
                                LOG_FILE : LOG_NONE);
      DBUG_PRINT("info", ("Got signal: %d  abort_loop: %d", sig, abort_loop));
      if (!abort_loop)
      {
        abort_loop= true;       // Mark abort for threads.
#ifdef HAVE_PSI_THREAD_INTERFACE
        // Delete the instrumentation for the signal thread.
        PSI_THREAD_CALL(delete_current_thread)();
#endif
        /*
          Kill the socket listener.
          The main thread will then set socket_listener_active= false,
          and wait for us to finish all the cleanup below.
        */
        mysql_mutex_lock(&LOCK_socket_listener_active);
        while (socket_listener_active)
        {
          DBUG_PRINT("info",("Killing socket listener"));
          if (pthread_kill(main_thread_id, SIGUSR1))
          {
            assert(false);
            break;
          }
          mysql_cond_wait(&COND_socket_listener_active,
                          &LOCK_socket_listener_active);
        }
        mysql_mutex_unlock(&LOCK_socket_listener_active);

        close_connections();
      }
      my_thread_end();
      my_thread_exit(0);
      return NULL;  // Avoid compiler warnings
      break;
    case SIGHUP:
      if (!abort_loop)
      {
        int not_used;
        mysql_print_status();   // Print some debug info
        reload_acl_and_cache(NULL,
                             (REFRESH_LOG | REFRESH_TABLES | REFRESH_FAST |
                              REFRESH_GRANT | REFRESH_THREADS | REFRESH_HOSTS),
                             NULL, &not_used); // Flush logs
        // Reenable query logs after the options were reloaded.
        query_logger.set_handlers(log_output_options);
      }
      break;
    default:
      break;          /* purecov: tested */
    }
  }
  return NULL;        /* purecov: deadcode */
}

#endif // !_WIN32
#endif // !EMBEDDED_LIBRARY

/**
  Starts processing signals initialized in the signal_hand function.

  @see signal_hand
*/
static void start_processing_signals()
{
  mysql_mutex_lock(&LOCK_server_started);
  mysqld_server_started= true;
  mysql_cond_broadcast(&COND_server_started);
  mysql_mutex_unlock(&LOCK_server_started);
}

#if HAVE_BACKTRACE && HAVE_ABI_CXA_DEMANGLE
#include <cxxabi.h>
extern "C" char *my_demangle(const char *mangled_name, int *status)
{
  return abi::__cxa_demangle(mangled_name, NULL, NULL, status);
}
#endif


/**
  All global error messages are sent here where the first one is stored
  for the client.
*/
/* ARGSUSED */
extern "C" void my_message_sql(uint error, const char *str, myf MyFlags);

void my_message_sql(uint error, const char *str, myf MyFlags)
{
  THD *thd= current_thd;
  DBUG_ENTER("my_message_sql");
  DBUG_PRINT("error", ("error: %u  message: '%s'", error, str));

  assert(str != NULL);
  /*
    An error should have a valid error number (!= 0), so it can be caught
    in stored procedures by SQL exception handlers.
    Calling my_error() with error == 0 is a bug.
    Remaining known places to fix:
    - storage/myisam/mi_create.c, my_printf_error()
    TODO:
    assert(error != 0);
  */

  if (error == 0)
  {
    /* At least, prevent new abuse ... */
    assert(strncmp(str, "MyISAM table", 12) == 0);
    error= ER_UNKNOWN_ERROR;
  }

  if (thd)
  {
    Sql_condition::enum_severity_level level= Sql_condition::SL_ERROR;

    /**
      Reporting an error invokes audit API call that notifies the error
      to the plugin. Audit API that generate the error adds a protection
      (condition handler) that prevents entering infinite recursion, when
      a plugin signals error, when already handling the error.

      handle_condition is normally invoked from within raise_condition,
      but we need to prevent recursion befere notifying error to the plugin.

      Additionaly, handle_condition must be called once during reporting
      an error, so the raise_condition is called depending on the result of
      the handle_condition call.
    */
    bool handle= thd->handle_condition(error,
                                       mysql_errno_to_sqlstate(error),
                                       &level,
                                       str ? str : ER(error));
#ifndef EMBEDDED_LIBRARY
    if (!handle)
      mysql_audit_notify(thd, AUDIT_EVENT(MYSQL_AUDIT_GENERAL_ERROR),
                         error, str, strlen(str));
#endif

    if (MyFlags & ME_FATALERROR)
      thd->is_fatal_error= 1;

    if (!handle)
      (void) thd->raise_condition(error, NULL, level, str, false);
  }

  /* When simulating OOM, skip writing to error log to avoid mtr errors */
  DBUG_EXECUTE_IF("simulate_out_of_memory", DBUG_VOID_RETURN;);

  if (!thd || MyFlags & ME_ERRORLOG)
    sql_print_error("%s: %s",my_progname,str); /* purecov: inspected */
  DBUG_VOID_RETURN;
}


#ifndef EMBEDDED_LIBRARY
extern "C" void *my_str_malloc_mysqld(size_t size);
extern "C" void my_str_free_mysqld(void *ptr);
extern "C" void *my_str_realloc_mysqld(void *ptr, size_t size);

void *my_str_malloc_mysqld(size_t size)
{
  return my_malloc(key_memory_my_str_malloc,
                   size, MYF(MY_FAE));
}


void my_str_free_mysqld(void *ptr)
{
  my_free(ptr);
}

void *my_str_realloc_mysqld(void *ptr, size_t size)
{
  return my_realloc(key_memory_my_str_malloc,
                    ptr, size, MYF(MY_FAE));
}
#endif // !EMBEDDED_LIBRARY

const char *load_default_groups[]= {
#ifdef WITH_NDBCLUSTER_STORAGE_ENGINE
"mysql_cluster",
#endif
"mysqld","server", MYSQL_BASE_VERSION, 0, 0};

#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
static const int load_default_groups_sz=
sizeof(load_default_groups)/sizeof(load_default_groups[0]);
#endif

#ifndef EMBEDDED_LIBRARY
/**
  This function is used to check for stack overrun for pathological
  cases of regular expressions and 'like' expressions.
  The call to current_thd is quite expensive, so we try to avoid it
  for the normal cases.
  The size of each stack frame for the wildcmp() routines is ~128 bytes,
  so checking *every* recursive call is not necessary.
 */
extern "C" int
check_enough_stack_size(int recurse_level)
{
  uchar stack_top;
  if (recurse_level % 16 != 0)
    return 0;

  THD *my_thd= current_thd;
  if (my_thd != NULL)
    return check_stack_overrun(my_thd, STACK_MIN_SIZE * 2, &stack_top);
  return 0;
}
#endif


/**
  Initialize one of the global date/time format variables.

  @param format_type    What kind of format should be supported
  @param var_ptr    Pointer to variable that should be updated

  @retval
    0 ok
  @retval
    1 error
*/

static bool init_global_datetime_format(timestamp_type format_type,
                                        Date_time_format *format)
{
  /*
    Get command line option
    format->format.str is already set by my_getopt
  */
  format->format.length= strlen(format->format.str);

  if (parse_date_time_format(format_type, format))
  {
    sql_print_error("Wrong date/time format specifier: %s",
                    format->format.str);
    return true;
  }
  return false;
}

SHOW_VAR com_status_vars[]= {
  {"admin_commands",       (char*) offsetof(STATUS_VAR, com_other),                                          SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"assign_to_keycache",   (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ASSIGN_TO_KEYCACHE]),         SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_db",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_DB]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_db_upgrade",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_DB_UPGRADE]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_event",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_EVENT]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_function",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_FUNCTION]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_instance",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_INSTANCE]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_procedure",      (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_PROCEDURE]),            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_server",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_SERVER]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_table",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_TABLE]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_tablespace",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_TABLESPACE]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"alter_user",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ALTER_USER]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"analyze",              (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ANALYZE]),                    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"begin",                (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_BEGIN]),                      SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"binlog",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_BINLOG_BASE64_EVENT]),        SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"call_procedure",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CALL]),                       SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"change_db",            (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CHANGE_DB]),                  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"change_master",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CHANGE_MASTER]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"change_repl_filter",   (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CHANGE_REPLICATION_FILTER]),  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"check",                (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CHECK]),                      SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"checksum",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CHECKSUM]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"commit",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_COMMIT]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_compression_dictionary", (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_COMPRESSION_DICTIONARY]), SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_db",            (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_DB]),                  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_event",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_EVENT]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_function",      (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_SPFUNCTION]),          SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_index",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_INDEX]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_procedure",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_PROCEDURE]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_server",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_SERVER]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_table",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_TABLE]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_trigger",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_TRIGGER]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_udf",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_FUNCTION]),            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_user",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_USER]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"create_view",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_CREATE_VIEW]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"dealloc_sql",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DEALLOCATE_PREPARE]),         SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"delete",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DELETE]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"delete_multi",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DELETE_MULTI]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"do",                   (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DO]),                         SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_compression_dictionary", (char*)offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_COMPRESSION_DICTIONARY]), SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_db",              (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_DB]),                    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_event",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_EVENT]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_function",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_FUNCTION]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_index",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_INDEX]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_procedure",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_PROCEDURE]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_server",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_SERVER]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_table",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_TABLE]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_trigger",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_TRIGGER]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_user",            (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_USER]),                  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"drop_view",            (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_DROP_VIEW]),                  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"empty_query",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_EMPTY_QUERY]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"execute_sql",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_EXECUTE]),                    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"explain_other",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_EXPLAIN_OTHER]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"flush",                (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_FLUSH]),                      SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"get_diagnostics",      (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_GET_DIAGNOSTICS]),            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"grant",                (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_GRANT]),                      SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"ha_close",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_HA_CLOSE]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"ha_open",              (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_HA_OPEN]),                    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"ha_read",              (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_HA_READ]),                    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"help",                 (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_HELP]),                       SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"insert",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_INSERT]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"insert_select",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_INSERT_SELECT]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"install_plugin",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_INSTALL_PLUGIN]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"kill",                 (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_KILL]),                       SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"load",                 (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_LOAD]),                       SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"lock_tables",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_LOCK_TABLES]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"lock_tables_for_backup",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_LOCK_TABLES_FOR_BACKUP]),    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"lock_binlog_for_backup",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_LOCK_BINLOG_FOR_BACKUP]),    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"optimize",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_OPTIMIZE]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"preload_keys",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_PRELOAD_KEYS]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"prepare_sql",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_PREPARE]),                    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"purge",                (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_PURGE]),                      SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"purge_before_date",    (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_PURGE_BEFORE]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"release_savepoint",    (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_RELEASE_SAVEPOINT]),          SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"rename_table",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_RENAME_TABLE]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"rename_user",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_RENAME_USER]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"repair",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_REPAIR]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"replace",              (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_REPLACE]),                    SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"replace_select",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_REPLACE_SELECT]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"reset",                (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_RESET]),                      SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"resignal",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_RESIGNAL]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"revoke",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_REVOKE]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"revoke_all",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_REVOKE_ALL]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"rollback",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ROLLBACK]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"rollback_to_savepoint",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_ROLLBACK_TO_SAVEPOINT]),      SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"savepoint",            (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SAVEPOINT]),                  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"select",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SELECT]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"set_option",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SET_OPTION]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"signal",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SIGNAL]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_binlog_events",   (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_BINLOG_EVENTS]),         SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_binlogs",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_BINLOGS]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_charsets",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CHARSETS]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_client_statistics",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CLIENT_STATS]),         SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_collations",      (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_COLLATIONS]),            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_create_db",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CREATE_DB]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_create_event",    (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CREATE_EVENT]),          SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_create_func",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CREATE_FUNC]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_create_proc",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CREATE_PROC]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_create_table",    (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CREATE]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_create_trigger",  (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CREATE_TRIGGER]),        SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_databases",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_DATABASES]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_engine_logs",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_ENGINE_LOGS]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_engine_mutex",    (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_ENGINE_MUTEX]),          SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_engine_status",   (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_ENGINE_STATUS]),         SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_events",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_EVENTS]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_errors",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_ERRORS]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_fields",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_FIELDS]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_function_code",   (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_FUNC_CODE]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_function_status", (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_STATUS_FUNC]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_grants",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_GRANTS]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_index_statistics",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_INDEX_STATS]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_keys",            (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_KEYS]),                  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_master_status",   (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_MASTER_STAT]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_open_tables",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_OPEN_TABLES]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_plugins",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_PLUGINS]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_privileges",      (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_PRIVILEGES]),            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_procedure_code",  (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_PROC_CODE]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_procedure_status",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_STATUS_PROC]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_processlist",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_PROCESSLIST]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_profile",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_PROFILE]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_profiles",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_PROFILES]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_relaylog_events", (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_RELAYLOG_EVENTS]),       SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_slave_hosts",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_SLAVE_HOSTS]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_slave_status",    (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_SLAVE_STAT]),            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_status",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_STATUS]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_storage_engines", (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_STORAGE_ENGINES]),       SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_table_statistics",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_TABLE_STATS]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_table_status",    (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_TABLE_STATUS]),          SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_tables",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_TABLES]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_thread_statistics",(char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_THREAD_STATS]),         SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_triggers",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_TRIGGERS]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_user_statistics", (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_USER_STATS]),            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_variables",       (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_VARIABLES]),             SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_warnings",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_WARNS]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"show_create_user",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHOW_CREATE_USER]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"shutdown",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SHUTDOWN]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"slave_start",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SLAVE_START]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"slave_stop",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_SLAVE_STOP]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"group_replication_start", (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_START_GROUP_REPLICATION]), SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"group_replication_stop",  (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_STOP_GROUP_REPLICATION]),  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"stmt_execute",         (char*) offsetof(STATUS_VAR, com_stmt_execute),                                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"stmt_close",           (char*) offsetof(STATUS_VAR, com_stmt_close),                                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"stmt_fetch",           (char*) offsetof(STATUS_VAR, com_stmt_fetch),                                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"stmt_prepare",         (char*) offsetof(STATUS_VAR, com_stmt_prepare),                                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"stmt_reset",           (char*) offsetof(STATUS_VAR, com_stmt_reset),                                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"stmt_send_long_data",  (char*) offsetof(STATUS_VAR, com_stmt_send_long_data),                            SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"truncate",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_TRUNCATE]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"uninstall_plugin",     (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_UNINSTALL_PLUGIN]),           SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"unlock_binlog",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_UNLOCK_BINLOG]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"unlock_tables",        (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_UNLOCK_TABLES]),              SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"update",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_UPDATE]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"update_multi",         (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_UPDATE_MULTI]),               SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"xa_commit",            (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_XA_COMMIT]),                  SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"xa_end",               (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_XA_END]),                     SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"xa_prepare",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_XA_PREPARE]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"xa_recover",           (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_XA_RECOVER]),                 SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"xa_rollback",          (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_XA_ROLLBACK]),                SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {"xa_start",             (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_XA_START]),                   SHOW_LONG_STATUS, SHOW_SCOPE_ALL},
  {NullS, NullS, SHOW_LONG, SHOW_SCOPE_ALL}
};


#ifndef EMBEDDED_LIBRARY
LEX_CSTRING sql_statement_names[(uint) SQLCOM_END + 1];

static void init_sql_statement_names()
{
  static LEX_CSTRING empty= { C_STRING_WITH_LEN("") };

  char *first_com= (char*) offsetof(STATUS_VAR, com_stat[0]);
  char *last_com= (char*) offsetof(STATUS_VAR, com_stat[(uint) SQLCOM_END]);
  int record_size= (char*) offsetof(STATUS_VAR, com_stat[1])
                   - (char*) offsetof(STATUS_VAR, com_stat[0]);
  char *ptr;
  uint i;
  uint com_index;

  for (i= 0; i < ((uint) SQLCOM_END + 1); i++)
    sql_statement_names[i]= empty;

  SHOW_VAR *var= &com_status_vars[0];
  while (var->name != NULL)
  {
    ptr= var->value;
    if ((first_com <= ptr) && (ptr <= last_com))
    {
      com_index= ((int)(ptr - first_com))/record_size;
      assert(com_index < (uint) SQLCOM_END);
      sql_statement_names[com_index].str= var->name;
      /* TODO: Change SHOW_VAR::name to a LEX_STRING, to avoid strlen() */
      sql_statement_names[com_index].length= strlen(var->name);
    }
    var++;
  }

  assert(strcmp(sql_statement_names[(uint) SQLCOM_SELECT].str, "select") == 0);
  assert(strcmp(sql_statement_names[(uint) SQLCOM_SIGNAL].str, "signal") == 0);

  sql_statement_names[(uint) SQLCOM_END].str= "error";
}
#endif // !EMBEDDED_LIBRARY

#ifdef HAVE_PSI_STATEMENT_INTERFACE
PSI_statement_info sql_statement_info[(uint) SQLCOM_END + 1];
PSI_statement_info com_statement_info[(uint) COM_END + 1];
PSI_statement_info stmt_info_new_packet;

/**
  Initialize the command names array.
  Since we do not want to maintain a separate array,
  this is populated from data mined in com_status_vars,
  which already has one name for each command.
*/
void init_sql_statement_info()
{
  uint i;

  for (i= 0; i < ((uint) SQLCOM_END + 1); i++)
  {
    sql_statement_info[i].m_name= sql_statement_names[i].str;
    sql_statement_info[i].m_flags= 0;
  }

  /* "statement/sql/error" represents broken queries (syntax error). */
  sql_statement_info[(uint) SQLCOM_END].m_name= "error";
  sql_statement_info[(uint) SQLCOM_END].m_flags= 0;
}

void init_com_statement_info()
{
  uint index;

  for (index= 0; index < (uint) COM_END + 1; index++)
  {
    com_statement_info[index].m_name= command_name[index].str;
    com_statement_info[index].m_flags= 0;
  }

  /* "statement/abstract/query" can mutate into "statement/sql/..." */
  com_statement_info[(uint) COM_QUERY].m_flags= PSI_FLAG_MUTABLE;
}
#endif

/**
  Create a replication file name or base for file names.

  @param[in] opt Value of option, or NULL
  @param[in] def Default value if option value is not set.
  @param[in] ext Extension to use for the path

  @returns Pointer to string containing the full file path, or NULL if
  it was not possible to create the path.
 */
static inline const char *
rpl_make_log_name(PSI_memory_key key,
                  const char *opt,
                  const char *def,
                  const char *ext)
{
  DBUG_ENTER("rpl_make_log_name");
  DBUG_PRINT("enter", ("opt: %s, def: %s, ext: %s", (opt && opt[0])? opt : "", def, ext));
  char buff[FN_REFLEN];
  /*
    opt[0] needs to be checked to make sure opt name is not an empty
    string, incase it is an empty string default name will be considered
  */
  const char *base= (opt && opt[0]) ? opt : def;
  unsigned int options=
    MY_REPLACE_EXT | MY_UNPACK_FILENAME | MY_SAFE_PATH;

  /* mysql_real_data_home_ptr may be null if no value of datadir has been
     specified through command-line or througha cnf file. If that is the
     case we make mysql_real_data_home_ptr point to mysql_real_data_home
     which, in that case holds the default path for data-dir.
  */

  DBUG_EXECUTE_IF("emulate_empty_datadir_param",
                  {
                    mysql_real_data_home_ptr= NULL;
                  };
                 );

  if(mysql_real_data_home_ptr == NULL)
    mysql_real_data_home_ptr= mysql_real_data_home;

  if (fn_format(buff, base, mysql_real_data_home_ptr, ext, options))
    DBUG_RETURN(my_strdup(key, buff, MYF(0)));
  else
    DBUG_RETURN(NULL);
}


int init_common_variables()
{
  umask(((~my_umask) & 0666));
  my_decimal_set_zero(&decimal_zero); // set decimal_zero constant;
  tzset();      // Set tzname

  max_system_variables.pseudo_thread_id= (my_thread_id) ~0;
  server_start_time= flush_status_time= my_time(0);

  rpl_filter= new Rpl_filter;
  binlog_filter= new Rpl_filter;
  if (!rpl_filter || !binlog_filter)
  {
    sql_print_error("Could not allocate replication and binlog filters: %s",
                    strerror(errno));
    return 1;
  }

  if (init_thread_environment() ||
      mysql_init_variables())
    return 1;

  ignore_db_dirs_init();

  {
    struct tm tm_tmp;
    localtime_r(&server_start_time,&tm_tmp);
#ifdef _WIN32
    strmake(system_time_zone, _tzname[tm_tmp.tm_isdst != 0 ? 1 : 0],
            sizeof(system_time_zone) - 1);
#else
    strmake(system_time_zone, tzname[tm_tmp.tm_isdst != 0 ? 1 : 0],
            sizeof(system_time_zone)-1);
#endif

 }

  /*
    We set SYSTEM time zone as reasonable default and
    also for failure of my_tz_init() and bootstrap mode.
    If user explicitly set time zone with --default-time-zone
    option we will change this value in my_tz_init().
  */
  global_system_variables.time_zone= my_tz_SYSTEM;

#ifdef HAVE_PSI_INTERFACE
  /*
    Complete the mysql_bin_log initialization.
    Instrumentation keys are known only after the performance schema initialization,
    and can not be set in the MYSQL_BIN_LOG constructor (called before main()).
  */
  mysql_bin_log.set_psi_keys(key_BINLOG_LOCK_index,
                             key_BINLOG_LOCK_commit,
                             key_BINLOG_LOCK_commit_queue,
                             key_BINLOG_LOCK_done,
                             key_BINLOG_LOCK_flush_queue,
                             key_BINLOG_LOCK_log,
                             key_BINLOG_LOCK_binlog_end_pos,
                             key_BINLOG_LOCK_sync,
                             key_BINLOG_LOCK_sync_queue,
                             key_BINLOG_LOCK_xids,
                             key_BINLOG_COND_done,
                             key_BINLOG_update_cond,
                             key_BINLOG_prep_xids_cond,
                             key_file_binlog,
                             key_file_binlog_index,
                             key_file_binlog_cache,
                             key_file_binlog_index_cache);
#endif

  /*
    Init mutexes for the global MYSQL_BIN_LOG objects.
    As safe_mutex depends on what MY_INIT() does, we can't init the mutexes of
    global MYSQL_BIN_LOGs in their constructors, because then they would be
    inited before MY_INIT(). So we do it here.
  */
  mysql_bin_log.init_pthread_objects();

  /* TODO: remove this when my_time_t is 64 bit compatible */
  if (!IS_TIME_T_VALID_FOR_TIMESTAMP(server_start_time))
  {
    sql_print_error("This MySQL server doesn't support dates later than 2038");
    return 1;
  }

  if (gethostname(glob_hostname,sizeof(glob_hostname)) < 0)
  {
    strmake(glob_hostname, STRING_WITH_LEN("localhost"));
    sql_print_warning("gethostname failed, using '%s' as hostname",
                      glob_hostname);
    strmake(default_logfile_name, STRING_WITH_LEN("mysql"));
  }
  else
    strmake(default_logfile_name, glob_hostname,
      sizeof(default_logfile_name)-5);

  strmake(pidfile_name, default_logfile_name, sizeof(pidfile_name)-5);
  my_stpcpy(fn_ext(pidfile_name),".pid");    // Add proper extension


  /*
    The default-storage-engine entry in my_long_options should have a
    non-null default value. It was earlier intialized as
    (longlong)"MyISAM" in my_long_options but this triggered a
    compiler error in the Sun Studio 12 compiler. As a work-around we
    set the def_value member to 0 in my_long_options and initialize it
    to the correct value here.

    From MySQL 5.5 onwards, the default storage engine is InnoDB
    (except in the embedded server, where the default continues to
    be MyISAM)
  */
#ifdef EMBEDDED_LIBRARY
  default_storage_engine= const_cast<char *>("MyISAM");
#else
  default_storage_engine= const_cast<char *>("InnoDB");
#endif
  default_tmp_storage_engine= default_storage_engine;


  /*
    Add server status variables to the dynamic list of
    status variables that is shown by SHOW STATUS.
    Later, in plugin_init, and mysql_install_plugin
    new entries could be added to that list.
  */
  if (add_status_vars(status_vars))
    return 1; // an error was already reported

#ifndef NDEBUG
  /*
    We have few debug-only commands in com_status_vars, only visible in debug
    builds. for simplicity we enable the assert only in debug builds

    There are 8 Com_ variables which don't have corresponding SQLCOM_ values:
    (TODO strictly speaking they shouldn't be here, should not have Com_ prefix
    that is. Perhaps Stmt_ ? Comstmt_ ? Prepstmt_ ?)

      Com_admin_commands       => com_other
      Com_stmt_close           => com_stmt_close
      Com_stmt_execute         => com_stmt_execute
      Com_stmt_fetch           => com_stmt_fetch
      Com_stmt_prepare         => com_stmt_prepare
      Com_stmt_reprepare       => com_stmt_reprepare
      Com_stmt_reset           => com_stmt_reset
      Com_stmt_send_long_data  => com_stmt_send_long_data

    With this correction the number of Com_ variables (number of elements in
    the array, excluding the last element - terminator) must match the number
    of SQLCOM_ constants.
  */
  compile_time_assert(sizeof(com_status_vars)/sizeof(com_status_vars[0]) - 1 ==
                     SQLCOM_END + 7);
#endif

  if (get_options(&remaining_argc, &remaining_argv))
    return 1;

  update_parser_max_mem_size();

  if (log_syslog_init())
    opt_log_syslog_enable= 0;

  if (set_default_auth_plugin(default_auth_plugin, strlen(default_auth_plugin)))
  {
    sql_print_error("Can't start server: "
		    "Invalid value for --default-authentication-plugin");
    return 1;
  }
  set_server_version();

  log_warnings= log_error_verbosity - 1; // backward compatibility

  sql_print_information("%s (mysqld %s) starting as process %lu ...",
                        my_progname, server_version, (ulong) getpid());


#ifndef EMBEDDED_LIBRARY
  if (opt_help && !opt_verbose)
    unireg_abort(MYSQLD_SUCCESS_EXIT);
#endif /*!EMBEDDED_LIBRARY*/

  DBUG_PRINT("info",("%s  Ver %s for %s on %s\n",my_progname,
         server_version, SYSTEM_TYPE,MACHINE_TYPE));

#ifdef HAVE_LINUX_LARGE_PAGES
  /* Initialize large page size */
  if (opt_large_pages && (opt_large_page_size= my_get_large_page_size()))
  {
      DBUG_PRINT("info", ("Large page set, large_page_size = %d",
                 opt_large_page_size));
      my_use_large_pages= 1;
      my_large_page_size= opt_large_page_size;
  }
  else
  {
    opt_large_pages= 0;
    /*
       Either not configured to use large pages or Linux haven't
       been compiled with large page support
    */
  }
#endif /* HAVE_LINUX_LARGE_PAGES */
#ifdef HAVE_SOLARIS_LARGE_PAGES
#define LARGE_PAGESIZE (4*1024*1024)  /* 4MB */
#define SUPER_LARGE_PAGESIZE (256*1024*1024)  /* 256MB */
  if (opt_large_pages)
  {
  /*
    tell the kernel that we want to use 4/256MB page for heap storage
    and also for the stack. We use 4 MByte as default and if the
    super-large-page is set we increase it to 256 MByte. 256 MByte
    is for server installations with GBytes of RAM memory where
    the MySQL Server will have page caches and other memory regions
    measured in a number of GBytes.
    We use as big pages as possible which isn't bigger than the above
    desired page sizes.
  */
   int nelem;
   size_t max_desired_page_size;
   if (opt_super_large_pages)
     max_desired_page_size= SUPER_LARGE_PAGESIZE;
   else
     max_desired_page_size= LARGE_PAGESIZE;
   nelem = getpagesizes(NULL, 0);
   if (nelem > 0)
   {
     size_t *pagesize = (size_t *) malloc(sizeof(size_t) * nelem);
     if (pagesize != NULL && getpagesizes(pagesize, nelem) > 0)
     {
       size_t max_page_size= 0;
       for (int i= 0; i < nelem; i++)
       {
         if (pagesize[i] > max_page_size &&
             pagesize[i] <= max_desired_page_size)
            max_page_size= pagesize[i];
       }
       free(pagesize);
       if (max_page_size > 0)
       {
         struct memcntl_mha mpss;

         mpss.mha_cmd= MHA_MAPSIZE_BSSBRK;
         mpss.mha_pagesize= max_page_size;
         mpss.mha_flags= 0;
         memcntl(NULL, 0, MC_HAT_ADVISE, (caddr_t)&mpss, 0, 0);
         mpss.mha_cmd= MHA_MAPSIZE_STACK;
         memcntl(NULL, 0, MC_HAT_ADVISE, (caddr_t)&mpss, 0, 0);
       }
     }
   }
  }
#endif /* HAVE_SOLARIS_LARGE_PAGES */

  longlong default_value;
  sys_var *var;
#ifndef EMBEDDED_LIBRARY
  /* Calculate and update default value for thread_cache_size. */
  if ((default_value= 8 + max_connections / 100) > 100)
    default_value= 100;
  var= intern_find_sys_var(STRING_WITH_LEN("thread_cache_size"));
  var->update_default(default_value);
#endif

  /* Calculate and update default value for host_cache_size. */
  if ((default_value= 128 + max_connections) > 628 &&
      (default_value= 628 + ((max_connections - 500) / 20)) > 2000)
    default_value= 2000;
  var= intern_find_sys_var(STRING_WITH_LEN("host_cache_size"));
  var->update_default(default_value);

#ifndef EMBEDDED_LIBRARY
  /* Fix thread_cache_size. */
  if (!thread_cache_size_specified &&
      (Per_thread_connection_handler::max_blocked_pthreads=
       8 + max_connections / 100) > 100)
    Per_thread_connection_handler::max_blocked_pthreads= 100;
#endif // !EMBEDDED_LIBRARY

  /* Fix host_cache_size. */
  if (!host_cache_size_specified &&
      (host_cache_size= 128 + max_connections) > 628 &&
      (host_cache_size= 628 + ((max_connections - 500) / 20)) > 2000)
    host_cache_size= 2000;

  /* Fix back_log */
  if (back_log == 0 && (back_log= 50 + max_connections / 5) > 900)
    back_log= 900;

  unireg_init(opt_specialflag); /* Set up extern variabels */
  if (!(my_default_lc_messages=
        my_locale_by_name(lc_messages)))
  {
    sql_print_error("Unknown locale: '%s'", lc_messages);
    return 1;
  }
  global_system_variables.lc_messages= my_default_lc_messages;
  if (init_errmessage())  /* Read error messages from file */
    return 1;
  init_client_errs();

  mysql_client_plugin_init();
  if (item_create_init())
    return 1;
  item_init();
#ifndef EMBEDDED_LIBRARY
  my_regex_init(&my_charset_latin1, check_enough_stack_size);
  my_string_stack_guard= check_enough_stack_size;
#else
  my_regex_init(&my_charset_latin1, NULL);
#endif
  /*
    Process a comma-separated character set list and choose
    the first available character set. This is mostly for
    test purposes, to be able to start "mysqld" even if
    the requested character set is not available (see bug#18743).
  */
  for (;;)
  {
    char *next_character_set_name= strchr(default_character_set_name, ',');
    if (next_character_set_name)
      *next_character_set_name++= '\0';
    if (!(default_charset_info=
          get_charset_by_csname(default_character_set_name,
                                MY_CS_PRIMARY, MYF(MY_WME))))
    {
      if (next_character_set_name)
      {
        default_character_set_name= next_character_set_name;
        default_collation_name= 0;          // Ignore collation
      }
      else
        return 1;                           // Eof of the list
    }
    else
      break;
  }

  if (default_collation_name)
  {
    CHARSET_INFO *default_collation;
    default_collation= get_charset_by_name(default_collation_name, MYF(0));
    if (!default_collation)
    {
      sql_print_error(ER_DEFAULT(ER_UNKNOWN_COLLATION), default_collation_name);
      return 1;
    }
    if (!my_charset_same(default_charset_info, default_collation))
    {
      sql_print_error(ER_DEFAULT(ER_COLLATION_CHARSET_MISMATCH),
          default_collation_name,
          default_charset_info->csname);
      return 1;
    }
    default_charset_info= default_collation;
  }
  /* Set collactions that depends on the default collation */
  global_system_variables.collation_server=  default_charset_info;
  global_system_variables.collation_database=  default_charset_info;

  if (is_supported_parser_charset(default_charset_info))
  {
    global_system_variables.collation_connection= default_charset_info;
    global_system_variables.character_set_results= default_charset_info;
    global_system_variables.character_set_client= default_charset_info;
  }
  else
  {
    sql_print_information("'%s' can not be used as client character set. "
                          "'%s' will be used as default client character set.",
                          default_charset_info->csname,
                          my_charset_latin1.csname);
    global_system_variables.collation_connection= &my_charset_latin1;
    global_system_variables.character_set_results= &my_charset_latin1;
    global_system_variables.character_set_client= &my_charset_latin1;
  }

  if (!(character_set_filesystem=
        get_charset_by_csname(character_set_filesystem_name,
                              MY_CS_PRIMARY, MYF(MY_WME))))
    return 1;
  global_system_variables.character_set_filesystem= character_set_filesystem;

  if (lex_init())
  {
    sql_print_error("Out of memory");
    return 1;
  }

  if (!(my_default_lc_time_names=
        my_locale_by_name(lc_time_names_name)))
  {
    sql_print_error("Unknown locale: '%s'", lc_time_names_name);
    return 1;
  }
  global_system_variables.lc_time_names= my_default_lc_time_names;

  /* check log options and issue warnings if needed */
  if (opt_general_log && opt_general_logname && !(log_output_options & LOG_FILE) &&
      !(log_output_options & LOG_NONE))
    sql_print_warning("Although a path was specified for the "
                      "--general-log-file option, log tables are used. "
                      "To enable logging to files use the --log-output=file option.");

  if (opt_slow_log && opt_slow_logname && !(log_output_options & LOG_FILE)
      && !(log_output_options & LOG_NONE))
    sql_print_warning("Although a path was specified for the "
                      "--slow-query-log-file option, log tables are used. "
                      "To enable logging to files use the --log-output=file option.");

  if (opt_general_logname &&
      !is_valid_log_name(opt_general_logname, strlen(opt_general_logname)))
  {
    sql_print_error("Invalid value for --general_log_file: %s",
                    opt_general_logname);
    return 1;
  }

  if (opt_slow_logname &&
      !is_valid_log_name(opt_slow_logname, strlen(opt_slow_logname)))
  {
    sql_print_error("Invalid value for --slow_query_log_file: %s",
                    opt_slow_logname);
    return 1;
  }

  /* We set the atomic field m_opt_tracking_mode to the value of the sysvar
     variable m_opt_tracking_mode_value here, as it now has the user given
     value
  */
  set_mysqld_opt_tracking_mode();
  if (global_system_variables.transaction_write_set_extraction == HASH_ALGORITHM_OFF
      && mysql_bin_log.m_dependency_tracker.m_opt_tracking_mode != DEPENDENCY_TRACKING_COMMIT_ORDER)
  {
    sql_print_error("The transaction_write_set_extraction must be set to XXHASH64 or MURMUR32"
                    " when binlog_transaction_dependency_tracking is WRITESET or WRITESET_SESSION.");
    return 1;
  }
  else
    mysql_bin_log.m_dependency_tracker.tracking_mode_changed();

  my_atomic_store64(&mysql_bin_log.m_dependency_tracker.get_writeset()->m_opt_max_history_size,
                    static_cast<int64>(mysql_bin_log.m_dependency_tracker.
                        get_writeset()->m_opt_max_history_size_base_var));


#define FIX_LOG_VAR(VAR, ALT)                                   \
  if (!VAR || !*VAR)                                            \
    VAR= ALT;

  FIX_LOG_VAR(opt_general_logname,
              make_query_log_name(logname_path, QUERY_LOG_GENERAL));
  FIX_LOG_VAR(opt_slow_logname,
              make_query_log_name(slow_logname_path, QUERY_LOG_SLOW));

#if defined(ENABLED_DEBUG_SYNC)
  /* Initialize the debug sync facility. See debug_sync.cc. */
  if (debug_sync_init())
    return 1; /* purecov: tested */
#endif /* defined(ENABLED_DEBUG_SYNC) */

#if defined(__linux__)
  if (use_temp_pool && bitmap_init(&temp_pool,0,1024,1))
    return 1;
#else
  use_temp_pool= 0;
#endif

  if (my_dboptions_cache_init())
    return 1;

  if (ignore_db_dirs_process_additions())
  {
    sql_print_error("An error occurred while storing ignore_db_dirs to a hash.");
    return 1;
  }

  /* create the data directory if requested */
  if (unlikely(opt_initialize) &&
      initialize_create_data_directory(mysql_real_data_home))
      return 1;


  /*
    Ensure that lower_case_table_names is set on system where we have case
    insensitive names.  If this is not done the users MyISAM tables will
    get corrupted if accesses with names of different case.
  */
  DBUG_PRINT("info", ("lower_case_table_names: %d", lower_case_table_names));
  lower_case_file_system= test_if_case_insensitive(mysql_real_data_home);
  if (!lower_case_table_names && lower_case_file_system == 1)
  {
    if (lower_case_table_names_used)
    {
      sql_print_error("The server option 'lower_case_table_names' is "
                      "configured to use case sensitive table names but the "
                      "data directory is on a case-insensitive file system "
                      "which is an unsupported combination. Please consider "
                      "either using a case sensitive file system for your data "
                      "directory or switching to a case-insensitive table name "
                      "mode.");
      return 1;
    }
    else
    {
      sql_print_warning("Setting lower_case_table_names=2 because file system for %s is case insensitive", mysql_real_data_home);
      lower_case_table_names= 2;
    }
  }
  else if (lower_case_table_names == 2 &&
           !(lower_case_file_system=
             (test_if_case_insensitive(mysql_real_data_home) == 1)))
  {
    sql_print_warning("lower_case_table_names was set to 2, even though your "
                        "the file system '%s' is case sensitive.  Now setting "
                        "lower_case_table_names to 0 to avoid future problems.",
      mysql_real_data_home);
    lower_case_table_names= 0;
  }
  else
  {
    lower_case_file_system=
      (test_if_case_insensitive(mysql_real_data_home) == 1);
  }

  /* Reset table_alias_charset, now that lower_case_table_names is set. */
  table_alias_charset= (lower_case_table_names ?
      &my_charset_utf8_tolower_ci :
      &my_charset_bin);

  /*
    Build do_table and ignore_table rules to hush
    after the resetting of table_alias_charset
  */
  if (rpl_filter->build_do_table_hash() ||
      rpl_filter->build_ignore_table_hash())
  {
    sql_print_error("An error occurred while building do_table"
                    "and ignore_table rules to hush.");
    return 1;
  }

  return 0;
}


static int init_thread_environment()
{
  mysql_mutex_init(key_LOCK_status, &LOCK_status, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_manager,
                   &LOCK_manager, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_crypt, &LOCK_crypt, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_user_conn, &LOCK_user_conn, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_global_system_variables,
                   &LOCK_global_system_variables, MY_MUTEX_INIT_FAST);
  mysql_rwlock_init(key_rwlock_LOCK_system_variables_hash,
                    &LOCK_system_variables_hash);
  mysql_mutex_init(key_LOCK_prepared_stmt_count,
                   &LOCK_prepared_stmt_count, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_sql_slave_skip_counter,
                   &LOCK_sql_slave_skip_counter, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_slave_net_timeout,
                   &LOCK_slave_net_timeout, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_slave_trans_dep_tracker,
                   &LOCK_slave_trans_dep_tracker, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_error_messages,
                   &LOCK_error_messages, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_uuid_generator,
                   &LOCK_uuid_generator, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_sql_rand,
                   &LOCK_sql_rand, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_log_throttle_qni,
                   &LOCK_log_throttle_qni, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_offline_mode,
                   &LOCK_offline_mode, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_default_password_lifetime,
                   &LOCK_default_password_lifetime, MY_MUTEX_INIT_FAST);
#ifdef HAVE_OPENSSL
  mysql_mutex_init(key_LOCK_des_key_file,
                   &LOCK_des_key_file, MY_MUTEX_INIT_FAST);
#endif
  mysql_rwlock_init(key_rwlock_LOCK_sys_init_connect, &LOCK_sys_init_connect);
  mysql_rwlock_init(key_rwlock_LOCK_sys_init_slave, &LOCK_sys_init_slave);
  mysql_cond_init(key_COND_manager, &COND_manager);
  mysql_mutex_init(key_LOCK_server_started,
                   &LOCK_server_started, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_keyring_operations,
                   &LOCK_keyring_operations, MY_MUTEX_INIT_FAST);
  mysql_cond_init(key_COND_server_started, &COND_server_started);
  mysql_mutex_init(key_LOCK_reset_gtid_table,
                   &LOCK_reset_gtid_table, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_compress_gtid_table,
                   &LOCK_compress_gtid_table, MY_MUTEX_INIT_FAST);
  mysql_cond_init(key_COND_compress_gtid_table,
                  &COND_compress_gtid_table);

  mysql_mutex_init(key_LOCK_global_user_client_stats,
                   &LOCK_global_user_client_stats, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_global_table_stats,
                   &LOCK_global_table_stats, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_LOCK_global_index_stats,
                   &LOCK_global_index_stats, MY_MUTEX_INIT_FAST);

#ifndef EMBEDDED_LIBRARY
  Events::init_mutexes();
#if defined(_WIN32)
  mysql_mutex_init(key_LOCK_handler_count,
                   &LOCK_handler_count, MY_MUTEX_INIT_FAST);
  mysql_cond_init(key_COND_handler_count, &COND_handler_count);
  mysql_rwlock_init(key_rwlock_LOCK_named_pipe_full_access_group,
                    &LOCK_named_pipe_full_access_group);
#else
  mysql_mutex_init(key_LOCK_socket_listener_active,
                   &LOCK_socket_listener_active, MY_MUTEX_INIT_FAST);
  mysql_cond_init(key_COND_socket_listener_active,
                  &COND_socket_listener_active);
  mysql_mutex_init(key_LOCK_start_signal_handler,
                   &LOCK_start_signal_handler, MY_MUTEX_INIT_FAST);
  mysql_cond_init(key_COND_start_signal_handler,
                  &COND_start_signal_handler);
#endif // _WIN32
#endif // !EMBEDDED_LIBRARY
  /* Parameter for threads created for connections */
  (void) my_thread_attr_init(&connection_attrib);
  my_thread_attr_setdetachstate(&connection_attrib, MY_THREAD_CREATE_DETACHED);
#ifndef _WIN32
  pthread_attr_setscope(&connection_attrib, PTHREAD_SCOPE_SYSTEM);
#endif

  assert(! THR_THD_initialized);
  assert(! THR_MALLOC_initialized);
  if (my_create_thread_local_key(&THR_THD,NULL) ||
      my_create_thread_local_key(&THR_MALLOC,NULL))
  {
    sql_print_error("Can't create thread-keys");
    return 1;
  }
  THR_THD_initialized= true;
  THR_MALLOC_initialized= true;
  return 0;
}

#ifndef EMBEDDED_LIBRARY
ssl_artifacts_status auto_detect_ssl()
{
  MY_STAT cert_stat, cert_key, ca_stat;
  uint result= 1;
  ssl_artifacts_status ret_status= SSL_ARTIFACTS_VIA_OPTIONS;

  if ((!opt_ssl_cert || !opt_ssl_cert[0]) &&
      (!opt_ssl_key || !opt_ssl_key[0]) &&
      (!opt_ssl_ca || !opt_ssl_ca[0]) &&
      (!opt_ssl_capath || !opt_ssl_capath[0]) &&
      (!opt_ssl_crl || !opt_ssl_crl[0]) &&
      (!opt_ssl_crlpath || !opt_ssl_crlpath[0]))
  {
    result= result << (my_stat(DEFAULT_SSL_SERVER_CERT, &cert_stat, MYF(0)) ? 1 : 0)
                   << (my_stat(DEFAULT_SSL_SERVER_KEY, &cert_key, MYF(0)) ? 1 : 0)
                   << (my_stat(DEFAULT_SSL_CA_CERT, &ca_stat, MYF(0)) ? 1 : 0);

    switch(result)
    {
      case 8:
        opt_ssl_ca= (char *)DEFAULT_SSL_CA_CERT;
        opt_ssl_cert= (char *)DEFAULT_SSL_SERVER_CERT;
        opt_ssl_key= (char *)DEFAULT_SSL_SERVER_KEY;
        ret_status= SSL_ARTIFACTS_AUTO_DETECTED;
        break;
      case 4:
      case 2:
        ret_status= SSL_ARTIFACT_TRACES_FOUND;
        break;
      default:
        ret_status= SSL_ARTIFACTS_NOT_FOUND;
        break;
    };
  }

  return ret_status;
}

int warn_one(const char *file_name)
{
  FILE *fp;
  char *issuer= NULL;
  char *subject= NULL;

  if (!(fp= my_fopen(file_name, O_RDONLY | O_BINARY, MYF(MY_WME))))
  {
    sql_print_error("Error opening CA certificate file");
    return 1;
  }

  X509 *ca_cert= PEM_read_X509(fp, 0, 0, 0);

  if (!ca_cert)
  {
    /* We are not interested in anything other than X509 certificates */
    my_fclose(fp, MYF(MY_WME));
    return 0;
  }

  issuer= X509_NAME_oneline(X509_get_issuer_name(ca_cert), 0, 0);
  subject= X509_NAME_oneline(X509_get_subject_name(ca_cert), 0, 0);

  if (!strcmp(issuer, subject))
  {
    sql_print_warning("CA certificate %s is self signed.", file_name);
  }

  OPENSSL_free(issuer);
  OPENSSL_free(subject);
  X509_free(ca_cert);
  my_fclose(fp, MYF(MY_WME));
  return 0;

}

int warn_self_signed_ca()
{
  int ret_val= 0;
  if (opt_ssl_ca && opt_ssl_ca[0])
  {
    if (warn_one(opt_ssl_ca))
      return 1;
  }
  if (opt_ssl_capath && opt_ssl_capath[0])
  {
    /* We have ssl-capath. So search all files in the dir */
    MY_DIR *ca_dir;
    uint file_count;
    DYNAMIC_STRING file_path;
    char dir_separator[FN_REFLEN];
    size_t dir_path_length;

    init_dynamic_string(&file_path, opt_ssl_capath, FN_REFLEN, FN_REFLEN);
    dir_separator[0]= FN_LIBCHAR;
    dir_separator[1]= 0;
    dynstr_append(&file_path, dir_separator);
    dir_path_length= file_path.length;

    if (!(ca_dir= my_dir(opt_ssl_capath,MY_WANT_STAT|MY_DONT_SORT|MY_WME)))
    {
      sql_print_error("Error accessing directory pointed by --ssl-capath");
      return 1;
    }

    for (file_count = 0; file_count < ca_dir->number_off_files; file_count++)
    {
      if (!MY_S_ISDIR(ca_dir->dir_entry[file_count].mystat->st_mode))
      {
        file_path.length= dir_path_length;
        dynstr_append(&file_path, ca_dir->dir_entry[file_count].name);
        if ((ret_val= warn_one(file_path.str)))
          break;
      }
    }
    my_dirend(ca_dir);
    dynstr_free(&file_path);

    ca_dir= 0;
    memset(&file_path, 0, sizeof(file_path));
  }
  return ret_val;
}

static void push_deprecated_tls_option_no_replacement(const char *tls_version) {
  sql_print_warning(ER_DEFAULT(ER_WARN_DEPRECATED_TLS_VERSION), tls_version);
}

#endif /* EMBEDDED_LIBRARY */

static int init_ssl()
{
#ifdef HAVE_OPENSSL
  int fips_mode= FIPS_mode();
  if (fips_mode != 0)
  {
    /* FIPS is enabled, Log warning and Disable it now */
    sql_print_warning(
        "Percona Server cannot operate under OpenSSL FIPS mode."
        " Disabling FIPS.");
    FIPS_mode_set(0);
  }
#if OPENSSL_VERSION_NUMBER < 0x10100000L
  CRYPTO_malloc_init();
#else /* OPENSSL_VERSION_NUMBER < 0x10100000L */
  OPENSSL_malloc_init();
#endif /* OPENSSL_VERSION_NUMBER < 0x10100000L */
  ssl_start();
#ifndef EMBEDDED_LIBRARY

  if (opt_use_ssl)
  {
    ssl_artifacts_status auto_detection_status= auto_detect_ssl();
    if (auto_detection_status == SSL_ARTIFACTS_AUTO_DETECTED)
      sql_print_information("Found %s, %s and %s in data directory. "
                            "Trying to enable SSL support using them.",
                            DEFAULT_SSL_CA_CERT, DEFAULT_SSL_SERVER_CERT,
                            DEFAULT_SSL_SERVER_KEY);
    if (do_auto_cert_generation(auto_detection_status) == false)
      return 1;

    enum enum_ssl_init_error error= SSL_INITERR_NOERROR;
    long ssl_ctx_flags= process_tls_version(opt_tls_version);

    if (!(ssl_ctx_flags & SSL_OP_NO_TLSv1))
      push_deprecated_tls_option_no_replacement("TLSv1");
    if (!(ssl_ctx_flags & SSL_OP_NO_TLSv1_1))
      push_deprecated_tls_option_no_replacement("TLSv1.1");

    /* having ssl_acceptor_fd != 0 signals the use of SSL */
    ssl_acceptor_fd= new_VioSSLAcceptorFd(opt_ssl_key, opt_ssl_cert,
					  opt_ssl_ca, opt_ssl_capath,
					  opt_ssl_cipher, &error,
                                          opt_ssl_crl, opt_ssl_crlpath, ssl_ctx_flags);
    DBUG_PRINT("info",("ssl_acceptor_fd: 0x%lx", (long) ssl_acceptor_fd));
#if OPENSSL_VERSION_NUMBER < 0x10100000L
    ERR_remove_thread_state(0);
#endif /* OPENSSL_VERSION_NUMBER < 0x10100000L */
    if (!ssl_acceptor_fd)
    {
      /*
        No real need for opt_use_ssl to be enabled in bootstrap mode,
        but we want the SSL materal generation and/or validation (if supplied).
        So we keep it on.
      */
      sql_print_warning("Failed to set up SSL because of the"
                        " following SSL library error: %s",
                        sslGetErrString(error));
      opt_use_ssl = 0;
      have_ssl= SHOW_OPTION_DISABLED;
    }
    else
    {
      /* Check if CA certificate is self signed */
      if (warn_self_signed_ca())
        return 1;
      /* create one SSL that we can use to read information from */
      if (!(ssl_acceptor= SSL_new(ssl_acceptor_fd->ssl_context)))
        return 1;
    }
  }
  else
  {
    have_ssl= SHOW_OPTION_DISABLED;
  }
#else
  have_ssl= SHOW_OPTION_DISABLED;
#endif /* ! EMBEDDED_LIBRARY */
  if (des_key_file)
    load_des_key_file(des_key_file);
  if (init_rsa_keys())
    return 1;
#endif /* HAVE_OPENSSL */
  return 0;
}


static void end_ssl()
{
#ifdef HAVE_OPENSSL
#ifndef EMBEDDED_LIBRARY
  if (ssl_acceptor_fd)
  {
    if (ssl_acceptor)
      SSL_free(ssl_acceptor);
    free_vio_ssl_acceptor_fd(ssl_acceptor_fd);
    ssl_acceptor_fd= 0;
  }
#endif /* ! EMBEDDED_LIBRARY */
  deinit_rsa_keys();
#endif /* HAVE_OPENSSL */
}

/**
  Generate a UUID and save it into server_uuid variable.

  @return Retur 0 or 1 if an error occurred.
 */
static int generate_server_uuid()
{
  THD *thd;
  Item_func_uuid *func_uuid;
  String uuid;

  /*
    To be able to run this from boot, we allocate a temporary THD
   */
  if (!(thd=new THD))
  {
    sql_print_error("Failed to generate a server UUID because it is failed"
                    " to allocate the THD.");
    return 1;
  }

  thd->thread_stack= (char*) &thd;
  thd->store_globals();

  /*
    Initialize the variables which are used during "uuid generator
    initialization" with values that should normally differ between
    mysqlds on the same host. This avoids that another mysqld started
    at the same time on the same host get the same "server_uuid".
  */
  sql_print_information("Salting uuid generator variables, current_pid: %lu, "
                        "server_start_time: %lu, bytes_sent: %llu, ",
                        current_pid,
                        (ulong)server_start_time, thd->status_var.bytes_sent);

  const time_t save_server_start_time= server_start_time;
  server_start_time+= ((ulonglong)current_pid << 48) + current_pid;
  thd->status_var.bytes_sent= (ulonglong)thd;

  lex_start(thd);
  func_uuid= new (thd->mem_root) Item_func_uuid();
  func_uuid->fixed= 1;
  func_uuid->val_str(&uuid);

  sql_print_information("Generated uuid: '%s', "
                        "server_start_time: %lu, bytes_sent: %llu",
                        uuid.c_ptr(),
                        (ulong)server_start_time, thd->status_var.bytes_sent);
  // Restore global variables used for salting
  server_start_time = save_server_start_time;

  delete thd;

  strncpy(server_uuid, uuid.c_ptr(), sizeof(server_uuid));
  DBUG_EXECUTE_IF("server_uuid_deterministic",
                  memcpy(server_uuid, "00000000-1111-0000-1111-000000000000",
                         UUID_LENGTH););
  server_uuid[UUID_LENGTH]= '\0';
  return 0;
}

/**
  Save all options which was auto-generated by server-self into the given file.

  @param fname The name of the file in which the auto-generated options will b
  e saved.

  @return Return 0 or 1 if an error occurred.
 */
int flush_auto_options(const char* fname)
{
  File fd;
  IO_CACHE io_cache;
  int result= 0;

  if ((fd= my_open(fname, O_CREAT|O_RDWR, MYF(MY_WME))) < 0)
  {
    sql_print_error("Failed to create file(file: '%s', errno %d)", fname, my_errno());
    return 1;
  }

  if (init_io_cache(&io_cache, fd, IO_SIZE*2, WRITE_CACHE, 0L, 0, MYF(MY_WME)))
  {
    sql_print_error("Failed to create a cache on (file: %s', errno %d)", fname, my_errno());
    my_close(fd, MYF(MY_WME));
    return 1;
  }

  my_b_seek(&io_cache, 0L);
  my_b_printf(&io_cache, "%s\n", "[auto]");
  my_b_printf(&io_cache, "server-uuid=%s\n", server_uuid);

  if (flush_io_cache(&io_cache) || my_sync(fd, MYF(MY_WME)))
    result= 1;

  my_close(fd, MYF(MY_WME));
  end_io_cache(&io_cache);
  return result;
}

/**
  File 'auto.cnf' resides in the data directory to hold values of options that
  server evaluates itself and that needs to be durable to sustain the server
  restart. There is only a section ['auto'] in the file. All these options are
  in the section. Only one option exists now, it is server_uuid.
  Note, the user may not supply any literal value to these auto-options, and
  only allowed to trigger (re)evaluation.
  For instance, 'server_uuid' value will be evaluated and stored if there is
  no corresponding line in the file.
  Because of the specifics of the auto-options, they need a seperate storage.
  Meanwhile, it is the 'auto.cnf' that has the same structure as 'my.cnf'.

  @todo consider to implement sql-query-able persistent storage by WL#5279.
  @return Return 0 or 1 if an error occurred.
 */
static int init_server_auto_options()
{
  bool flush= false;
  char fname[FN_REFLEN];
  char *name= (char *)"auto";
  const char *groups[]= {"auto", NULL};
  char *uuid= 0;
  my_option auto_options[]= {
    {"server-uuid", 0, "", &uuid, &uuid,
      0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
    {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
  };

  DBUG_ENTER("init_server_auto_options");

  if (NULL == fn_format(fname, "auto.cnf", mysql_data_home, "",
                        MY_UNPACK_FILENAME | MY_SAFE_PATH))
    DBUG_RETURN(1);

  /* load_defaults require argv[0] is not null */
  char **argv= &name;
  int argc= 1;
  if (!check_file_permissions(fname, false))
  {
    /*
      Found a world writable file hence removing it as it is dangerous to write
      a new UUID into the same file.
     */
    my_delete(fname,MYF(MY_WME));
    sql_print_warning("World-writable config file '%s' has been removed.\n",
                      fname);
  }

  /* load all options in 'auto.cnf'. */
  if (my_load_defaults(fname, groups, &argc, &argv, NULL))
    DBUG_RETURN(1);

  /*
    Record the origial pointer allocated by my_load_defaults for free,
    because argv will be changed by handle_options
   */
  char **old_argv= argv;
  if (handle_options(&argc, &argv, auto_options, mysqld_get_one_option))
    DBUG_RETURN(1);

  DBUG_PRINT("info", ("uuid=%p=%s server_uuid=%s", uuid, uuid, server_uuid));
  if (uuid)
  {
    if (!Uuid::is_valid(uuid))
    {
      sql_print_error("The server_uuid stored in auto.cnf file is not a valid UUID.");
      goto err;
    }
    /*
      Uuid::is_valid() cannot do strict check on the length as it will be
      called by GTID::is_valid() as well (GTID = UUID:seq_no). We should
      explicitly add the *length check* here in this function.

      If UUID length is less than '36' (UUID_LENGTH), that error case would have
      got caught in above is_valid check. The below check is to make sure that
      length is not greater than UUID_LENGTH i.e., there are no extra characters
      (Garbage) at the end of the valid UUID.
    */
    if (strlen(uuid) > UUID_LENGTH)
    {
      sql_print_error("Garbage characters found at the end of the server_uuid "
                      "value in auto.cnf file. It should be of length '%d' "
                      "(UUID_LENGTH). Clear it and restart the server. ",
                      UUID_LENGTH);
      goto err;
    }
    strcpy(server_uuid, uuid);
  }
  else
  {
    DBUG_PRINT("info", ("generating server_uuid"));
    flush= TRUE;
    /* server_uuid will be set in the function */
    if (generate_server_uuid())
      goto err;
    DBUG_PRINT("info", ("generated server_uuid=%s", server_uuid));
    sql_print_warning("No existing UUID has been found, so we assume that this"
                      " is the first time that this server has been started."
                      " Generating a new UUID: %s.",
                      server_uuid);
  }
  /*
    The uuid has been copied to server_uuid, so the memory allocated by
    my_load_defaults can be freed now.
   */
  free_defaults(old_argv);

  if (flush)
    DBUG_RETURN(flush_auto_options(fname));
  DBUG_RETURN(0);
err:
  free_defaults(argv);
  DBUG_RETURN(1);
}


static bool
initialize_storage_engine(char *se_name, const char *se_kind,
                          plugin_ref *dest_plugin)
{
  LEX_STRING name= { se_name, strlen(se_name) };
  plugin_ref plugin;
  handlerton *hton;
  if ((plugin= ha_resolve_by_name(0, &name, FALSE)))
    hton= plugin_data<handlerton*>(plugin);
  else
  {
    sql_print_error("Unknown/unsupported storage engine: %s", se_name);
    return true;
  }
  if (!ha_storage_engine_is_enabled(hton))
  {
    if (!opt_bootstrap)
    {
      sql_print_error("Default%s storage engine (%s) is not available",
                      se_kind, se_name);
      return true;
    }
    assert(*dest_plugin);
  }
  else
  {
    /*
      Need to unlock as global_system_variables.table_plugin
      was acquired during plugin_init()
    */
    plugin_ref old_dest_plugin = *dest_plugin;
    *dest_plugin = plugin;
    plugin_unlock(0, old_dest_plugin);
  }
  return false;
}


static void init_server_query_cache()
{
  ulong set_cache_size;

  query_cache.set_min_res_unit(query_cache_min_res_unit);
  query_cache.init();

  set_cache_size= query_cache.resize(query_cache_size);
  if (set_cache_size != query_cache_size)
  {
    sql_print_warning(ER_DEFAULT(ER_WARN_QC_RESIZE), query_cache_size,
                      set_cache_size);
    query_cache_size= set_cache_size;
  }
}


static int init_server_components()
{
  DBUG_ENTER("init_server_components");
  /*
    We need to call each of these following functions to ensure that
    all things are initialized so that unireg_abort() doesn't fail
  */
  mdl_init();
  partitioning_init();
  if (table_def_init() | hostname_cache_init(host_cache_size))
    unireg_abort(MYSQLD_ABORT_EXIT);

  if (my_timer_initialize())
    sql_print_error("Failed to initialize timer component (errno %d).", errno);
  else
    have_statement_timeout= SHOW_OPTION_YES;

  init_server_query_cache();

  randominit(&sql_rand,(ulong) server_start_time,(ulong) server_start_time/2);
  setup_fpu();
#ifdef HAVE_REPLICATION
  init_slave_list();
#endif

#ifndef EMBEDDED_LIBRARY
  init_global_table_stats();
  init_global_index_stats();
#endif

  /* Setup logs */

  /*
    Enable old-fashioned error log, except when the user has requested
    help information. Since the implementation of plugin server
    variables the help output is now written much later.

    log_error_dest can be:
    disabled_my_option     --log-error was not used or --log-error=
    ""                     --log-error without arguments (no '=')
    filename               --log-error=filename
  */
#ifdef _WIN32
  /*
    Enable the error log file only if console option is not specified
    and --help is not used.
  */
  bool log_errors_to_file= !opt_help && !opt_console;
#else
  /*
    Enable the error log file only if --log-error=filename or --log-error
    was used. Logging to file is disabled by default unlike on Windows.
  */
  bool log_errors_to_file= !opt_help && (log_error_dest != disabled_my_option);
#endif

  if (log_errors_to_file)
  {
    // Construct filename if no filename was given by the user.
    if (!log_error_dest[0] || log_error_dest == disabled_my_option)
      fn_format(errorlog_filename_buff, pidfile_name, mysql_data_home, ".err",
                MY_REPLACE_EXT); /* replace '.<domain>' by '.err', bug#4997 */
    else
      fn_format(errorlog_filename_buff, log_error_dest, mysql_data_home, ".err",
                MY_UNPACK_FILENAME);
    /*
      log_error_dest may have been set to disabled_my_option or "" if no
      argument was passed, but we need to show the real name in SHOW VARIABLES.
    */
    log_error_dest= errorlog_filename_buff;

    if (open_error_log(errorlog_filename_buff, false))
      unireg_abort(MYSQLD_ABORT_EXIT);

  }
  else
  {
    // We are logging to stderr and SHOW VARIABLES should reflect that.
    log_error_dest= "stderr";
    // Flush messages buffered so far.
    flush_error_log_messages();
  }

  enter_cond_hook= thd_enter_cond;
  exit_cond_hook= thd_exit_cond;
  is_killed_hook= (int(*)(const void*))thd_killed;

  if (transaction_cache_init())
  {
    sql_print_error("Out of memory");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  /*
    initialize delegates for extension observers, errors have already
    been reported in the function
  */
  if (delegates_init())
    unireg_abort(MYSQLD_ABORT_EXIT);

  /* need to configure logging before initializing storage engines */
  if (opt_log_slave_updates && !opt_bin_log)
  {
    sql_print_warning("You need to use --log-bin to make "
                    "--log-slave-updates work.");
  }
  if (binlog_format_used && !opt_bin_log)
    sql_print_warning("You need to use --log-bin to make "
                      "--binlog-format work.");

  /* Check that we have not let the format to unspecified at this point */
  assert((uint)global_system_variables.binlog_format <=
         array_elements(binlog_format_names)-1);

#ifdef HAVE_REPLICATION
  if (opt_log_slave_updates && replicate_same_server_id)
  {
    if (opt_bin_log)
    {
      sql_print_error("using --replicate-same-server-id in conjunction with \
--log-slave-updates is impossible, it would lead to infinite loops in this \
server.");
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
    else
      sql_print_warning("using --replicate-same-server-id in conjunction with \
--log-slave-updates would lead to infinite loops in this server. However this \
will be ignored as the --log-bin option is not defined.");
  }
#endif

  opt_server_id_mask = ~ulong(0);
#ifdef HAVE_REPLICATION
  opt_server_id_mask = (opt_server_id_bits == 32)?
    ~ ulong(0) : (1 << opt_server_id_bits) -1;
  if (server_id != (server_id & opt_server_id_mask))
  {
    sql_print_error("server-id configured is too large to represent with"
                    "server-id-bits configured.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
#endif

  if (opt_bin_log)
  {
    /* Reports an error and aborts, if the --log-bin's path
       is a directory.*/
    if (opt_bin_logname &&
        opt_bin_logname[strlen(opt_bin_logname) - 1] == FN_LIBCHAR)
    {
      sql_print_error("Path '%s' is a directory name, please specify \
a file name for --log-bin option", opt_bin_logname);
      unireg_abort(MYSQLD_ABORT_EXIT);
    }

    /* Reports an error and aborts, if the --log-bin-index's path
       is a directory.*/
    if (opt_binlog_index_name &&
        opt_binlog_index_name[strlen(opt_binlog_index_name) - 1]
        == FN_LIBCHAR)
    {
      sql_print_error("Path '%s' is a directory name, please specify \
a file name for --log-bin-index option", opt_binlog_index_name);
      unireg_abort(MYSQLD_ABORT_EXIT);
    }

    char buf[FN_REFLEN];
    const char *ln;
    ln= mysql_bin_log.generate_name(opt_bin_logname, "-bin", buf);
    if (!opt_bin_logname && !opt_binlog_index_name)
    {
      /*
        User didn't give us info to name the binlog index file.
        Picking `hostname`-bin.index like did in 4.x, causes replication to
        fail if the hostname is changed later. So, we would like to instead
        require a name. But as we don't want to break many existing setups, we
        only give warning, not error.
      */
      sql_print_warning("No argument was provided to --log-bin, and "
                        "--log-bin-index was not used; so replication "
                        "may break when this MySQL server acts as a "
                        "master and has his hostname changed!! Please "
                        "use '--log-bin=%s' to avoid this problem.", ln);
    }
    if (ln == buf)
    {
      my_free(opt_bin_logname);
      opt_bin_logname=my_strdup(key_memory_opt_bin_logname,
                                buf, MYF(0));
    }

    /*
      Skip opening the index file if we start with --help. This is necessary
      to avoid creating the file in an otherwise empty datadir, which will
      cause a succeeding 'mysqld --initialize' to fail.
    */
    if (!opt_help && mysql_bin_log.open_index_file(opt_binlog_index_name, ln, TRUE))
    {
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
  }

  if (opt_bin_log)
  {
    /*
      opt_bin_logname[0] needs to be checked to make sure opt binlog name is
      not an empty string, incase it is an empty string default file
      extension will be passed
     */
    log_bin_basename=
      rpl_make_log_name(key_memory_MYSQL_BIN_LOG_basename,
                        opt_bin_logname, default_logfile_name,
                        (opt_bin_logname && opt_bin_logname[0]) ? "" : "-bin");
    log_bin_index=
      rpl_make_log_name(key_memory_MYSQL_BIN_LOG_index,
                        opt_binlog_index_name, log_bin_basename, ".index");
    if (log_bin_basename == NULL || log_bin_index == NULL)
    {
      sql_print_error("Unable to create replication path names:"
                      " out of memory or path names too long"
                      " (path name exceeds " STRINGIFY_ARG(FN_REFLEN)
                      " or file name exceeds " STRINGIFY_ARG(FN_LEN) ").");
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
  }

#ifndef EMBEDDED_LIBRARY
  DBUG_PRINT("debug",
             ("opt_bin_logname: %s, opt_relay_logname: %s, pidfile_name: %s",
              opt_bin_logname, opt_relay_logname, pidfile_name));
  /*
    opt_relay_logname[0] needs to be checked to make sure opt relaylog name is
    not an empty string, incase it is an empty string default file
    extension will be passed
   */
  relay_log_basename=
    rpl_make_log_name(key_memory_MYSQL_RELAY_LOG_basename,
                      opt_relay_logname, default_logfile_name,
                      (opt_relay_logname && opt_relay_logname[0]) ? "" : "-relay-bin");

  if (relay_log_basename != NULL)
    relay_log_index=
      rpl_make_log_name(key_memory_MYSQL_RELAY_LOG_index,
                        opt_relaylog_index_name, relay_log_basename, ".index");

  if (relay_log_basename == NULL || relay_log_index == NULL)
  {
    sql_print_error("Unable to create replication path names:"
                    " out of memory or path names too long"
                    " (path name exceeds " STRINGIFY_ARG(FN_REFLEN)
                    " or file name exceeds " STRINGIFY_ARG(FN_LEN) ").");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
#endif /* !EMBEDDED_LIBRARY */

  /* call ha_init_key_cache() on all key caches to init them */
  process_key_caches(&ha_init_key_cache);

  /* Allow storage engine to give real error messages */
  if (ha_init_errors())
    DBUG_RETURN(1);

  if (opt_ignore_builtin_innodb)
    sql_print_warning("ignore-builtin-innodb is ignored "
                      "and will be removed in future releases.");
  if (gtid_server_init())
  {
    sql_print_error("Failed to initialize GTID structures.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  /*
    Set tc_log to point to TC_LOG_DUMMY early in order to allow plugin_init()
    to commit attachable transaction after reading from mysql.plugin table.
    If necessary tc_log will be adjusted to point to correct TC_LOG instance
    later.
  */
  tc_log= &tc_log_dummy;

  /*Load early plugins */
  if (plugin_register_early_plugins(&remaining_argc, remaining_argv,
                                    opt_help ?
                                      PLUGIN_INIT_SKIP_INITIALIZATION : 0))
  {
    sql_print_error("Failed to initialize early plugins.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  /* Load builtin plugins, initialize MyISAM, CSV and InnoDB */
  if (plugin_register_builtin_and_init_core_se(&remaining_argc,
                                               remaining_argv))
  {
    sql_print_error("Failed to initialize builtin plugins.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  /*
    Skip reading the plugin table when starting with --help in order
    to also skip initializing InnoDB. This provides a simpler and more
    uniform handling of various startup use cases, e.g. when the data
    directory does not exist, exists but is empty, exists with InnoDB
    system tablespaces present etc.
  */
  if (plugin_register_dynamic_and_init_all(&remaining_argc, remaining_argv,
                  (opt_noacl ? PLUGIN_INIT_SKIP_PLUGIN_TABLE : 0) |
                  (opt_help ? (PLUGIN_INIT_SKIP_INITIALIZATION |
                               PLUGIN_INIT_SKIP_PLUGIN_TABLE) : 0)))
  {
    sql_print_error("Failed to initialize dynamic plugins.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  plugins_are_initialized= TRUE;  /* Don't separate from init function */

  Session_tracker session_track_system_variables_check;
  LEX_STRING var_list;
  char *tmp_str;
  size_t len= strlen(global_system_variables.track_sysvars_ptr);
  tmp_str= (char *)my_malloc(PSI_NOT_INSTRUMENTED, len*sizeof(char)+2,
                             MYF(MY_WME));
  strcpy(tmp_str,global_system_variables.track_sysvars_ptr);
  var_list.length= len;
  var_list.str= tmp_str;
  if (session_track_system_variables_check.server_boot_verify(system_charset_info,
	                                                      var_list))
  {
    sql_print_error("The variable session_track_system_variables either has "
	            "duplicate values or invalid values.");
    if (tmp_str)
      my_free(tmp_str);
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  if (tmp_str)
    my_free(tmp_str);
  /* we do want to exit if there are any other unknown options */
  if (remaining_argc > 1)
  {
    int ho_error;
    struct my_option no_opts[]=
    {
      {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
    };
    /*
      We need to eat any 'loose' arguments first before we conclude
      that there are unprocessed options.
    */
    my_getopt_skip_unknown= 0;

    if ((ho_error= handle_options(&remaining_argc, &remaining_argv, no_opts,
                                  mysqld_get_one_option)))
      unireg_abort(MYSQLD_ABORT_EXIT);
    /* Add back the program name handle_options removes */
    remaining_argc++;
    remaining_argv--;
    my_getopt_skip_unknown= TRUE;

    if (remaining_argc > 1)
    {
      sql_print_error("Too many arguments (first extra is '%s').",
                      remaining_argv[1]);
      sql_print_information("Use --verbose --help to get a list "
                            "of available options!");
      unireg_abort(MYSQLD_ABORT_EXIT);

    }
  }

  if (opt_help)
    unireg_abort(MYSQLD_SUCCESS_EXIT);

  /* if the errmsg.sys is not loaded, terminate to maintain behaviour */
  if (!my_default_lc_messages->errmsgs->is_loaded())
  {
    sql_print_error("Unable to read errmsg.sys file");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  if (opt_libcoredumper)
  {
#if HAVE_LIBCOREDUMPER
    if (opt_corefile)
    {
      sql_print_warning(
          "Started with --core-file and --coredumper. "
          "--coredumper will take precedence.");
    }
    if (opt_libcoredumper_path != NULL)
    {
      if (!validate_libcoredumper_path(opt_libcoredumper_path))
      {
        unireg_abort(MYSQLD_ABORT_EXIT);
      }
    }
#else
    sql_print_warning(
        "This version of MySQL has not been compiled with "
        "libcoredumper support, ignoring --coredumper argument");
#endif
  }

  /* We have to initialize the storage engines before CSV logging */
  if (ha_init())
  {
    sql_print_error("Can't init databases");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  if (opt_bootstrap)
    log_output_options= LOG_FILE;

  /*
    Issue a warning if there were specified additional options to the
    log-output along with NONE. Probably this wasn't what user wanted.
  */
  if ((log_output_options & LOG_NONE) && (log_output_options & ~LOG_NONE))
    sql_print_warning("There were other values specified to "
                      "log-output besides NONE. Disabling slow "
                      "and general logs anyway.");

  if (log_output_options & LOG_TABLE)
  {
    /* Fall back to log files if the csv engine is not loaded. */
    LEX_CSTRING csv_name={C_STRING_WITH_LEN("csv")};
    if (!plugin_is_ready(csv_name, MYSQL_STORAGE_ENGINE_PLUGIN))
    {
      sql_print_error("CSV engine is not present, falling back to the "
                      "log files");
      log_output_options= (log_output_options & ~LOG_TABLE) | LOG_FILE;
    }
  }

  query_logger.set_handlers(log_output_options);

  // Open slow log file if enabled.
  query_logger.set_log_file(QUERY_LOG_SLOW);
  if (opt_slow_log && query_logger.reopen_log_file(QUERY_LOG_SLOW))
    opt_slow_log= false;

  // Open general log file if enabled.
  query_logger.set_log_file(QUERY_LOG_GENERAL);
  if (opt_general_log && query_logger.reopen_log_file(QUERY_LOG_GENERAL))
    opt_general_log= false;

  /*
    Set the default storage engines
  */
  if (initialize_storage_engine(default_storage_engine, "",
                                &global_system_variables.table_plugin))
    unireg_abort(MYSQLD_ABORT_EXIT);
  if (initialize_storage_engine(default_tmp_storage_engine, " temp",
                                &global_system_variables.temp_table_plugin))
    unireg_abort(MYSQLD_ABORT_EXIT);

  if (!opt_bootstrap && !opt_noacl)
  {
    std::string disabled_se_str(opt_disabled_storage_engines);
    ha_set_normalized_disabled_se_str(disabled_se_str);

    // Log warning if default_storage_engine is a disabled storage engine.
    handlerton *default_se_handle=
      plugin_data<handlerton*>(global_system_variables.table_plugin);
    if (ha_is_storage_engine_disabled(default_se_handle))
      sql_print_warning("default_storage_engine is set to a "
                        "disabled storage engine %s.", default_storage_engine);

    // Log warning if default_tmp_storage_engine is a disabled storage engine.
    handlerton *default_tmp_se_handle=
      plugin_data<handlerton*>(global_system_variables.temp_table_plugin);
    if (ha_is_storage_engine_disabled(default_tmp_se_handle))
      sql_print_warning("default_tmp_storage_engine is set to a "
                        "disabled storage engine %s.",
                        default_tmp_storage_engine);

  }

  /*
    Validate any enforced storage engine
  */
  if (enforce_storage_engine && !opt_bootstrap && !opt_noacl)
  {
    LEX_STRING name= { enforce_storage_engine,
      strlen(enforce_storage_engine) };
    plugin_ref plugin;
    if ((plugin= ha_resolve_by_name(0, &name, false)))
    {
      handlerton *hton = plugin_data<handlerton *>(plugin);
      LEX_STRING defname= { default_storage_engine,
        strlen(default_storage_engine) };
      plugin_ref defplugin;
      handlerton* defhton;
      if ((defplugin= ha_resolve_by_name(0, &defname, false)))
      {
        defhton = plugin_data<handlerton *>(defplugin);
        if (defhton != hton)
        {
          sql_print_warning("Default storage engine (%s)"
            " is not the same as enforced storage engine (%s)",
            default_storage_engine,
            enforce_storage_engine);
        }
      }
      if (ha_is_storage_engine_disabled(hton))
      {
        sql_print_error("enforced storage engine %s is among disabled storage "
                        "engines", enforce_storage_engine);
        unireg_abort(1);
      }
      plugin_unlock(0, defplugin);
      plugin_unlock(0, plugin);
    }
    else
    {
      sql_print_error("Unknown/unsupported storage engine: %s",
                    enforce_storage_engine);
      unireg_abort(1);
    }
  }

  if (total_ha_2pc > 1 || (1 == total_ha_2pc && opt_bin_log))
  {
    if (opt_bin_log)
      tc_log= &mysql_bin_log;
    else
      tc_log= &tc_log_mmap;
  }

  if (tc_log->open(opt_bin_log ? opt_bin_logname : opt_tc_log_file))
  {
    sql_print_error("Can't init tc log");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
  (void)RUN_HOOK(server_state, before_recovery, (NULL));

  if (ha_recover(0))
  {
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  if (encrypt_binlog)
  {
    if (!opt_master_verify_checksum ||
        binlog_checksum_options == binary_log::BINLOG_CHECKSUM_ALG_OFF ||
        binlog_checksum_options == binary_log::BINLOG_CHECKSUM_ALG_UNDEF)
    {
      sql_print_error("BINLOG_ENCRYPTION requires MASTER_VERIFY_CHECKSUM = ON and "
                      "BINLOG_CHECKSUM to be turned ON.");
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
    if (!opt_bin_log)
      sql_print_information("binlog and relay log encryption enabled without binary logging being enabled. "
                            "If relay logs are in use, they will be encrypted.");
  }

  /// @todo: this looks suspicious, revisit this /sven
  enum_gtid_mode gtid_mode= get_gtid_mode(GTID_MODE_LOCK_NONE);

  if (gtid_mode == GTID_MODE_ON &&
      _gtid_consistency_mode != GTID_CONSISTENCY_MODE_ON)
  {
    sql_print_error("GTID_MODE = ON requires ENFORCE_GTID_CONSISTENCY = ON.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  if (opt_bin_log)
  {
    /*
      Configures what object is used by the current log to store processed
      gtid(s). This is necessary in the MYSQL_BIN_LOG::MYSQL_BIN_LOG to
      corretly compute the set of previous gtids.
    */
    assert(!mysql_bin_log.is_relay_log);
    mysql_mutex_t *log_lock= mysql_bin_log.get_log_lock();
    mysql_mutex_lock(log_lock);

    if (mysql_bin_log.open_binlog(opt_bin_logname, 0,
                                  max_binlog_size, false,
                                  true/*need_lock_index=true*/,
                                  true/*need_sid_lock=true*/,
                                  NULL))
    {
      mysql_mutex_unlock(log_lock);
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
    mysql_mutex_unlock(log_lock);
  }

  if (opt_myisam_log)
    (void) mi_log(1);

#if defined(HAVE_MLOCKALL) && defined(MCL_CURRENT) && !defined(EMBEDDED_LIBRARY)
  if (locked_in_memory && !getuid())
  {
    if (setreuid((uid_t)-1, 0) == -1)
    {                        // this should never happen
      sql_print_error("setreuid: %s", strerror(errno));
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
    if (mlockall(MCL_CURRENT))
    {
      sql_print_warning("Failed to lock memory. Errno: %d\n",errno); /* purecov: inspected */
      locked_in_memory= 0;
    }
#ifndef _WIN32
    if (user_info)
      set_user(mysqld_user, user_info);
#endif
  }
  else
#endif
    locked_in_memory=0;

  /* Initialize the optimizer cost module */
  init_optimizer_cost_module(true);
  ft_init_stopwords();

  init_max_user_conn();
  init_update_queries();
#ifndef EMBEDDED_LIBRARY
  init_global_user_stats();
  init_global_client_stats();
  init_global_thread_stats();
#endif
  DBUG_RETURN(0);
}


#ifndef EMBEDDED_LIBRARY
#ifdef _WIN32

extern "C" void *handle_shutdown(void *arg)
{
  MSG msg;
  my_thread_init();
  /* This call should create the message queue for this thread. */
  PeekMessage(&msg, NULL, 1, 65534,PM_NOREMOVE);
  if (WaitForSingleObject(hEventShutdown,INFINITE)==WAIT_OBJECT_0)
  {
    sql_print_information(ER_DEFAULT(ER_NORMAL_SHUTDOWN), my_progname);
    abort_loop= true;
    close_connections();
    my_thread_end();
    my_thread_exit(0);
  }
  return 0;
}


static void create_shutdown_thread()
{
  hEventShutdown=CreateEvent(0, FALSE, FALSE, shutdown_event_name);
  my_thread_attr_t thr_attr;
  DBUG_ENTER("create_shutdown_thread");

  my_thread_attr_init(&thr_attr);

  if (my_thread_create(&shutdown_thr_handle, &thr_attr, handle_shutdown, 0))
    sql_print_warning("Can't create thread to handle shutdown requests"
                      " (errno= %d)", errno);
  my_thread_attr_destroy(&thr_attr);
  // On "Stop Service" we have to do regular shutdown
  Service.SetShutdownEvent(hEventShutdown);
}
#endif /* _WIN32 */

#ifndef NDEBUG
/*
  Debugging helper function to keep the locale database
  (see sql_locale.cc) and max_month_name_length and
  max_day_name_length variable values in consistent state.
*/
static void test_lc_time_sz()
{
  DBUG_ENTER("test_lc_time_sz");
  for (MY_LOCALE **loc= my_locales; *loc; loc++)
  {
    size_t max_month_len= 0;
    size_t max_day_len = 0;
    for (const char **month= (*loc)->month_names->type_names; *month; month++)
    {
      set_if_bigger(max_month_len,
                    my_numchars_mb(&my_charset_utf8_general_ci,
                                   *month, *month + strlen(*month)));
    }
    for (const char **day= (*loc)->day_names->type_names; *day; day++)
    {
      set_if_bigger(max_day_len,
                    my_numchars_mb(&my_charset_utf8_general_ci,
                                   *day, *day + strlen(*day)));
    }
    if ((*loc)->max_month_name_length != max_month_len ||
        (*loc)->max_day_name_length != max_day_len)
    {
      DBUG_PRINT("Wrong max day name(or month name) length for locale:",
                 ("%s", (*loc)->name));
      assert(0);
    }
  }
  DBUG_VOID_RETURN;
}
#endif//NDEBUG

/*
  @brief : Set opt_super_readonly to user supplied value before
           enabling communication channels to accept user connections
*/

static void set_super_read_only_post_init()
{
  opt_super_readonly= super_read_only;
}

#ifdef _WIN32
int win_main(int argc, char **argv)
#else
int mysqld_main(int argc, char **argv)
#endif
{
  /*
    Perform basic thread library and malloc initialization,
    to be able to read defaults files and parse options.
  */
  my_progname= argv[0];

#ifndef _WIN32
#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
  pre_initialize_performance_schema();
#endif /*WITH_PERFSCHEMA_STORAGE_ENGINE */
  // For windows, my_init() is called from the win specific mysqld_main
  if (my_init())                 // init my_sys library & pthreads
  {
    sql_print_error("my_init() failed.");
    flush_error_log_messages();
    return 1;
  }
#endif /* _WIN32 */

  orig_argc= argc;
  orig_argv= argv;
  my_getopt_use_args_separator= TRUE;
  my_defaults_read_login_file= FALSE;
  if (load_defaults(MYSQL_CONFIG_NAME, load_default_groups, &argc, &argv))
  {
    flush_error_log_messages();
    return 1;
  }
  my_getopt_use_args_separator= FALSE;
  defaults_argc= argc;
  defaults_argv= argv;
  remaining_argc= argc;
  remaining_argv= argv;

  /* Must be initialized early for comparison of options name */
  system_charset_info= &my_charset_utf8_general_ci;

  /* Write mysys error messages to the error log. */
  local_message_hook= error_log_print;

  int ho_error;

#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
  /*
    Initialize the array of performance schema instrument configurations.
  */
  init_pfs_instrument_array();
#endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */

  ho_error= handle_early_options();

#if !defined(_WIN32) && !defined(EMBEDDED_LIBRARY)

  if (opt_bootstrap && opt_daemonize)
  {
    fprintf(stderr, "Bootstrap and daemon options are incompatible.\n");
    exit(MYSQLD_ABORT_EXIT);
  }

  if (opt_daemonize && log_error_dest == disabled_my_option &&
      (isatty(STDOUT_FILENO) || isatty(STDERR_FILENO)))
  {
    fprintf(stderr, "Please enable --log-error option or set appropriate "
                    "redirections for standard output and/or standard error "
                    "in daemon mode.\n");
    exit(MYSQLD_ABORT_EXIT);
  }

  if (opt_daemonize)
  {
    if (chdir("/") < 0)
    {
      fprintf(stderr, "Cannot change to root director: %s\n",
                      strerror(errno));
      exit(MYSQLD_ABORT_EXIT);
    }

    if ((pipe_write_fd= mysqld::runtime::mysqld_daemonize()) < 0)
    {
      fprintf(stderr, "mysqld_daemonize failed \n");
      exit(MYSQLD_ABORT_EXIT);
    }
  }
#endif

  init_sql_statement_names();
  sys_var_init();
  ulong requested_open_files;
  adjust_related_options(&requested_open_files);
  // moved signal initialization here so that PFS thread inherited signal mask
  my_init_signals();

#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
  if (ho_error == 0)
  {
    if (!opt_help && !opt_bootstrap)
    {
      /* Add sizing hints from the server sizing parameters. */
      pfs_param.m_hints.m_table_definition_cache= table_def_size;
      pfs_param.m_hints.m_table_open_cache= table_cache_size;
      pfs_param.m_hints.m_max_connections= max_connections;
      pfs_param.m_hints.m_open_files_limit= requested_open_files;
      pfs_param.m_hints.m_max_prepared_stmt_count= max_prepared_stmt_count;

      PSI_hook= initialize_performance_schema(&pfs_param);
      if (PSI_hook == NULL && pfs_param.m_enabled)
      {
        pfs_param.m_enabled= false;
        sql_print_warning("Performance schema disabled (reason: init failed).");
      }
    }
  }
#else
  /*
    Other provider of the instrumentation interface should
    initialize PSI_hook here:
    - HAVE_PSI_INTERFACE is for the instrumentation interface
    - WITH_PERFSCHEMA_STORAGE_ENGINE is for one implementation
      of the interface,
    but there could be alternate implementations, which is why
    these two defines are kept separate.
  */
#endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */

#ifdef HAVE_PSI_INTERFACE
  /*
    Obtain the current performance schema instrumentation interface,
    if available.
  */
  if (PSI_hook)
  {
    PSI *psi_server= (PSI*) PSI_hook->get_interface(PSI_CURRENT_VERSION);
    if (likely(psi_server != NULL))
    {
      set_psi_server(psi_server);

      /*
        Now that we have parsed the command line arguments, and have initialized
        the performance schema itself, the next step is to register all the
        server instruments.
      */
      init_server_psi_keys();
      /* Instrument the main thread */
      PSI_thread *psi= PSI_THREAD_CALL(new_thread)(key_thread_main, NULL, 0);
      PSI_THREAD_CALL(set_thread_os_id)(psi);
      PSI_THREAD_CALL(set_thread)(psi);

      /*
        Now that some instrumentation is in place,
        recreate objects which were initialised early,
        so that they are instrumented as well.
      */
      my_thread_global_reinit();
    }
  }
#endif /* HAVE_PSI_INTERFACE */

  init_error_log();

  /* Initialize audit interface globals. Audit plugins are inited later. */
  mysql_audit_initialize();

#ifndef EMBEDDED_LIBRARY
  Srv_session::module_init();
#endif

  /*
    Perform basic query log initialization. Should be called after
    MY_INIT, as it initializes mutexes.
  */
  query_logger.init();

  if (ho_error)
  {
    /*
      Parsing command line option failed,
      Since we don't have a workable remaining_argc/remaining_argv
      to continue the server initialization, this is as far as this
      code can go.
      This is the best effort to log meaningful messages:
      - messages will be printed to stderr, which is not redirected yet,
      - messages will be printed in the NT event log, for windows.
    */
    flush_error_log_messages();
    /*
      Not enough initializations for unireg_abort()
      Using exit() for windows.
    */
    exit (MYSQLD_ABORT_EXIT);
  }

  if (init_common_variables())
    unireg_abort(MYSQLD_ABORT_EXIT);        // Will do exit

#ifndef EMBEDDED_LIBRARY
  // Move connection handler initialization after the signal handling has been
  // set up. Percona Server threadpool constructor is heavy, and creates a
  // timer thread. If done before my_init_signals(), this thread will have
  // the default signal mask, breaking SIGTERM etc. handing.
  // This is not a problem with upstream loadable thread scheduler plugins, as
  // its constructor is light and actual initialization is done later.
  // This bit should be reverted once Percona Server threadpool becomes a
  // plugin.
  if (Connection_handler_manager::init())
  {
    sql_print_error("Could not allocate memory for connection handling");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
#endif

  size_t guardize= 0;
#ifndef _WIN32
  int retval= pthread_attr_getguardsize(&connection_attrib, &guardize);
  assert(retval == 0);
  if (retval != 0)
    guardize= my_thread_stack_size;
#endif

#if defined(__ia64__) || defined(__ia64)
  /*
    Peculiar things with ia64 platforms - it seems we only have half the
    stack size in reality, so we have to double it here
  */
  guardize= my_thread_stack_size;
#endif

  my_thread_attr_setstacksize(&connection_attrib,
                            my_thread_stack_size + guardize);

  {
    /* Retrieve used stack size;  Needed for checking stack overflows */
    size_t stack_size= 0;
    my_thread_attr_getstacksize(&connection_attrib, &stack_size);

    /* We must check if stack_size = 0 as Solaris 2.9 can return 0 here */
    if (stack_size && stack_size < (my_thread_stack_size + guardize))
    {
      sql_print_warning("Asked for %lu thread stack, but got %ld",
                        my_thread_stack_size + guardize, (long) stack_size);
#if defined(__ia64__) || defined(__ia64)
      my_thread_stack_size= stack_size / 2;
#else
      my_thread_stack_size= static_cast<ulong>(stack_size - guardize);
#endif
    }
  }

#ifndef NDEBUG
  test_lc_time_sz();
  srand(static_cast<uint>(time(NULL)));
#endif

#ifndef _WIN32
  if ((user_info= check_user(mysqld_user)))
  {
#if HAVE_CHOWN
    if (unlikely(opt_initialize))
    {
      /* need to change the owner of the freshly created data directory */
      MY_STAT stat;
      char errbuf[MYSYS_STRERROR_SIZE];
      bool must_chown= true;

      /* fetch the directory's owner */
      if (!my_stat(mysql_real_data_home, &stat, MYF(0)))
      {
        sql_print_information("Can't read data directory's stats (%d): %s."
                              "Assuming that it's not owned by the same user/group",
                              my_errno(),
                              my_strerror(errbuf, sizeof(errbuf), my_errno()));
      }
      /* Don't change it if it's already the same as SElinux stops this */
      else if(stat.st_uid == user_info->pw_uid &&
              stat.st_gid == user_info->pw_gid)
        must_chown= false;

      if (must_chown &&
          chown(mysql_real_data_home, user_info->pw_uid, user_info->pw_gid)
         )
      {
        sql_print_error("Can't change data directory owner to %s", mysqld_user);
        unireg_abort(1);
      }
    }
#endif


#if defined(HAVE_MLOCKALL) && defined(MCL_CURRENT)
    if (locked_in_memory) // getuid() == 0 here
      set_effective_user(user_info);
    else
#endif
      set_user(mysqld_user, user_info);
  }
#endif // !_WIN32

  /*
   initiate key migration if any one of the migration specific
   options are provided.
  */
  if (opt_keyring_migration_source ||
      opt_keyring_migration_destination ||
      migrate_connect_options)
  {
    Migrate_keyring mk;
    if (mk.init(remaining_argc, remaining_argv,
                opt_keyring_migration_source,
                opt_keyring_migration_destination,
                opt_keyring_migration_user,
                opt_keyring_migration_host,
                opt_keyring_migration_password,
                opt_keyring_migration_socket,
                opt_keyring_migration_port))
    {
      sql_print_error(ER_DEFAULT(ER_KEYRING_MIGRATION_STATUS),
                      "failed");
      log_error_dest= "stderr";
      flush_error_log_messages();
      unireg_abort(MYSQLD_ABORT_EXIT);
    }

    if (mk.execute())
    {
      sql_print_error(ER_DEFAULT(ER_KEYRING_MIGRATION_STATUS),
                      "failed");
      log_error_dest= "stderr";
      flush_error_log_messages();
      unireg_abort(MYSQLD_ABORT_EXIT);
    }

    sql_print_information(ER_DEFAULT(ER_KEYRING_MIGRATION_STATUS),
                          "successful");
    log_error_dest= "stderr";
    flush_error_log_messages();
    unireg_abort(MYSQLD_SUCCESS_EXIT);
  }

  /*
   We have enough space for fiddling with the argv, continue
  */
  if (my_setwd(mysql_real_data_home,MYF(MY_WME)) && !opt_help)
  {
    sql_print_error("failed to set datadir to %s", mysql_real_data_home);
    unireg_abort(MYSQLD_ABORT_EXIT);        /* purecov: inspected */
  }

  //If the binlog is enabled, one needs to provide a server-id
  if (opt_bin_log && !(server_id_supplied) )
  {
    sql_print_error("You have enabled the binary log, but you haven't provided "
                    "the mandatory server-id. Please refer to the proper "
                    "server start-up parameters documentation");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  /*
   The subsequent calls may take a long time : e.g. innodb log read.
   Thus set the long running service control manager timeout
  */
#if defined(_WIN32)
  Service.SetSlowStarting(slow_start_timeout);
#endif

  if (init_server_components())
    unireg_abort(MYSQLD_ABORT_EXIT);

  /*
    Each server should have one UUID. We will create it automatically, if it
    does not exist.
   */
  if (init_server_auto_options())
  {
    sql_print_error("Initialization of the server's UUID failed because it could"
                    " not be read from the auto.cnf file. If this is a new"
                    " server, the initialization failed because it was not"
                    " possible to generate a new UUID.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  /* Server generates uuid after innodb is initialized. But during
  initialization, if tablespaces like system, redo, temporary are encrypted,
  they are initialized with "empty" UUID. Now UUID is available, fix the
  empty UUID of such tablespaces now */
  if (innodb_hton != NULL && innodb_hton->fix_tablespaces_empty_uuid)
  {
    if (innodb_hton->fix_tablespaces_empty_uuid())
    {
      sql_print_error("Fixing empty UUID with InnoDB Engine failed. Please"
		      " check if keyring plugin is loaded and execute"
		      " \"ALTER INSTANCE ROTATE INNODB MASTER KEY\"");
    }
  }

  /*
    Add server_uuid to the sid_map.  This must be done after
    server_uuid has been initialized in init_server_auto_options and
    after the binary log (and sid_map file) has been initialized in
    init_server_components().

    No error message is needed: init_sid_map() prints a message.

    Strictly speaking, this is not currently needed when
    opt_bin_log==0, since the variables that gtid_state->init
    initializes are not currently used in that case.  But we call it
    regardless to avoid possible future bugs if gtid_state ever
    needs to do anything else.
  */
  global_sid_lock->wrlock();
  int gtid_ret= gtid_state->init();
  global_sid_lock->unlock();

  if (gtid_ret)
    unireg_abort(MYSQLD_ABORT_EXIT);

  // Initialize executed_gtids from mysql.gtid_executed table.
  if (gtid_state->read_gtid_executed_from_table() == -1)
    unireg_abort(1);

  if (opt_bin_log)
  {
    /*
      Initialize GLOBAL.GTID_EXECUTED and GLOBAL.GTID_PURGED from
      gtid_executed table and binlog files during server startup.
    */
    Gtid_set *executed_gtids=
      const_cast<Gtid_set *>(gtid_state->get_executed_gtids());
    Gtid_set *lost_gtids=
      const_cast<Gtid_set *>(gtid_state->get_lost_gtids());
    Gtid_set *gtids_only_in_table=
      const_cast<Gtid_set *>(gtid_state->get_gtids_only_in_table());
    Gtid_set *previous_gtids_logged=
      const_cast<Gtid_set *>(gtid_state->get_previous_gtids_logged());

    Gtid_set purged_gtids_from_binlog(global_sid_map, global_sid_lock);
    Gtid_set gtids_in_binlog(global_sid_map, global_sid_lock);
    Gtid_set gtids_in_binlog_not_in_table(global_sid_map, global_sid_lock);

    if (mysql_bin_log.init_gtid_sets(&gtids_in_binlog,
                                     &purged_gtids_from_binlog,
                                     opt_master_verify_checksum,
                                     true/*true=need lock*/,
                                     NULL/*trx_parser*/,
                                     NULL/*gtid_partial_trx*/,
                                     true/*is_server_starting*/))
      unireg_abort(MYSQLD_ABORT_EXIT);

    global_sid_lock->wrlock();

    purged_gtids_from_binlog.dbug_print("purged_gtids_from_binlog");
    gtids_in_binlog.dbug_print("gtids_in_binlog");

    if (!gtids_in_binlog.is_empty() &&
        !gtids_in_binlog.is_subset(executed_gtids))
    {
      gtids_in_binlog_not_in_table.add_gtid_set(&gtids_in_binlog);
      if (!executed_gtids->is_empty())
        gtids_in_binlog_not_in_table.remove_gtid_set(executed_gtids);
      /*
        Save unsaved GTIDs into gtid_executed table, in the following
        four cases:
          1. the upgrade case.
          2. the case that a slave is provisioned from a backup of
             the master and the slave is cleaned by RESET MASTER
             and RESET SLAVE before this.
          3. the case that no binlog rotation happened from the
             last RESET MASTER on the server before it crashes.
          4. The set of GTIDs of the last binlog is not saved into the
             gtid_executed table if server crashes, so we save it into
             gtid_executed table and executed_gtids during recovery
             from the crash.
      */
      if (gtid_state->save(&gtids_in_binlog_not_in_table) == -1)
      {
        global_sid_lock->unlock();
        unireg_abort(MYSQLD_ABORT_EXIT);
      }
      executed_gtids->add_gtid_set(&gtids_in_binlog_not_in_table);
    }

    /* gtids_only_in_table= executed_gtids - gtids_in_binlog */
    if (gtids_only_in_table->add_gtid_set(executed_gtids) !=
        RETURN_STATUS_OK)
    {
      global_sid_lock->unlock();
      unireg_abort(MYSQLD_ABORT_EXIT);
    }
    gtids_only_in_table->remove_gtid_set(&gtids_in_binlog);
    /*
      lost_gtids = executed_gtids -
                   (gtids_in_binlog - purged_gtids_from_binlog)
                 = gtids_only_in_table + purged_gtids_from_binlog;
    */
    assert(lost_gtids->is_empty());
    if (lost_gtids->add_gtid_set(gtids_only_in_table) != RETURN_STATUS_OK ||
        lost_gtids->add_gtid_set(&purged_gtids_from_binlog) !=
        RETURN_STATUS_OK)
    {
      global_sid_lock->unlock();
      unireg_abort(MYSQLD_ABORT_EXIT);
    }

    /* Prepare previous_gtids_logged for next binlog */
    if (previous_gtids_logged->add_gtid_set(&gtids_in_binlog) !=
        RETURN_STATUS_OK)
    {
      global_sid_lock->unlock();
      unireg_abort(MYSQLD_ABORT_EXIT);
    }

    /*
      Write the previous set of gtids at this point because during
      the creation of the binary log this is not done as we cannot
      move the init_gtid_sets() to a place before openning the binary
      log. This requires some investigation.

      /Alfranio
    */
    Previous_gtids_log_event prev_gtids_ev(&gtids_in_binlog);

    global_sid_lock->unlock();

    (prev_gtids_ev.common_footer)->checksum_alg=
      static_cast<enum_binlog_checksum_alg>(binlog_checksum_options);

    Binlog_crypt_data *crypto_data= mysql_bin_log.get_crypto_data();

    if (crypto_data->is_enabled())
      prev_gtids_ev.event_encrypter.enable_encryption(crypto_data);

    if (prev_gtids_ev.write(mysql_bin_log.get_log_file()))
      unireg_abort(MYSQLD_ABORT_EXIT);
    mysql_bin_log.add_bytes_written(
      prev_gtids_ev.common_header->data_written);

    if (flush_io_cache(mysql_bin_log.get_log_file()) ||
        mysql_file_sync(mysql_bin_log.get_log_file()->file, MYF(MY_WME)))
      unireg_abort(MYSQLD_ABORT_EXIT);
    mysql_bin_log.update_binlog_end_pos();

#ifdef HAVE_REPLICATION
    if (opt_bin_log && expire_logs_days)
    {
      time_t purge_time= server_start_time - expire_logs_days * 24 * 60 * 60;
      DBUG_EXECUTE_IF("expire_logs_always_at_start",
                      { purge_time= my_time(0); });
      if (purge_time >= 0)
        mysql_bin_log.purge_logs_before_date(purge_time, true);
    }

    if (opt_bin_log && max_binlog_files)
      mysql_bin_log.purge_logs_maximum_number(max_binlog_files);

    if (opt_bin_log && binlog_space_limit)
      mysql_bin_log.purge_logs_by_size(true);
#endif

    (void) RUN_HOOK(server_state, after_engine_recovery, (NULL));
  }


  if (init_ssl())
    unireg_abort(MYSQLD_ABORT_EXIT);
  if (network_init())
    unireg_abort(MYSQLD_ABORT_EXIT);

  init_io_cache_encryption(encrypt_tmp_files);

#ifdef _WIN32
#ifndef EMBEDDED_LIBRARY
  if (opt_require_secure_transport &&
      !opt_enable_shared_memory && !opt_use_ssl &&
      !opt_initialize && !opt_bootstrap)
  {
    sql_print_error("Server is started with --require-secure-transport=ON "
                    "but no secure transports (SSL or Shared Memory) are "
                    "configured.");
    unireg_abort(MYSQLD_ABORT_EXIT);
  }
#endif

#endif

  /*
   Initialize my_str_malloc(), my_str_realloc() and my_str_free()
  */
  my_str_malloc= &my_str_malloc_mysqld;
  my_str_free= &my_str_free_mysqld;
  my_str_realloc= &my_str_realloc_mysqld;

  error_handler_hook= my_message_sql;

  /* Save pid of this process in a file */
  if (!opt_bootstrap)
    create_pid_file();


  /* Read the optimizer cost model configuration tables */
  if (!opt_bootstrap)
    reload_optimizer_cost_constants();

  if (mysql_rm_tmp_tables() || acl_init(opt_noacl) ||
      my_tz_init((THD *)0, default_tz_name, opt_bootstrap) ||
      grant_init(opt_noacl))
  {
    abort_loop= true;
    sql_print_error("Fatal error: Failed to initialize ACL/grant/time zones "
                    "structures or failed to remove temporary table files.");

    delete_pid_file(MYF(MY_WME));

    unireg_abort(MYSQLD_ABORT_EXIT);
  }

  if (!opt_bootstrap)
    servers_init(0);

  if (!opt_noacl)
  {
#ifdef HAVE_DLOPEN
    udf_init();
#endif
  }

  init_status_vars();
  /* If running with bootstrap, do not start replication. */
  if (opt_bootstrap)
    opt_skip_slave_start= 1;

  check_binlog_cache_size(NULL);
  check_binlog_stmt_cache_size(NULL);

  binlog_unsafe_map_init();

  /* If running with bootstrap, do not start replication. */
  if (!opt_bootstrap)
  {
    // Make @@slave_skip_errors show the nice human-readable value.
    set_slave_skip_errors(&opt_slave_skip_errors);

    /*
      init_slave() must be called after the thread keys are created.
    */
    if (server_id != 0)
      init_slave(); /* Ignoring errors while configuring replication. */
  }

#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
  initialize_performance_schema_acl(opt_bootstrap);
  /*
    Do not check the structure of the performance schema tables
    during bootstrap:
    - the tables are not supposed to exist yet, bootstrap will create them
    - a check would print spurious error messages
  */
  if (! opt_bootstrap)
    check_performance_schema();
#endif

  initialize_information_schema_acl();

  execute_ddl_log_recovery();
  (void) RUN_HOOK(server_state, after_recovery, (NULL));

  if (Events::init(opt_noacl || opt_bootstrap))
    unireg_abort(MYSQLD_ABORT_EXIT);

#ifndef _WIN32
  //  Start signal handler thread.
  start_signal_handler();
#endif

  if (opt_bootstrap)
  {
    start_processing_signals();

    int error= bootstrap(mysql_stdin);
    unireg_abort(error ? MYSQLD_ABORT_EXIT : MYSQLD_SUCCESS_EXIT);
  }

  if (opt_init_file && *opt_init_file)
  {
    if (read_init_file(opt_init_file))
      unireg_abort(MYSQLD_ABORT_EXIT);
  }

  /*
    Event must be invoked after error_handler_hook is assigned to
    my_message_sql, otherwise my_message will not cause the event to abort.
  */
  if (mysql_audit_notify(AUDIT_EVENT(MYSQL_AUDIT_SERVER_STARTUP_STARTUP),
                         (const char **) argv, argc))
    unireg_abort(MYSQLD_ABORT_EXIT);

#ifdef _WIN32
  create_shutdown_thread();
#endif
  start_handle_manager();

  create_compress_gtid_table_thread();

  sql_print_information(ER_DEFAULT(ER_STARTUP),
                        my_progname,
                        server_version,
#ifdef HAVE_SYS_UN_H
                        (opt_bootstrap ? (char*) "" : mysqld_unix_port),
#else
                        (char*) "",
#endif
                         mysqld_port,
                         MYSQL_COMPILATION_COMMENT);
#if defined(_WIN32)
  Service.SetRunning();
#endif

  start_processing_signals();

#ifdef WITH_NDBCLUSTER_STORAGE_ENGINE
  /* engine specific hook, to be made generic */
  if (ndb_wait_setup_func && ndb_wait_setup_func(opt_ndb_wait_setup))
  {
    sql_print_warning("NDB : Tables not available after %lu seconds."
                      "  Consider increasing --ndb-wait-setup value",
                      opt_ndb_wait_setup);
  }
#endif

  if (!opt_bootstrap)
  {
    /*
      Execute an I_S query to implicitly check for tables using the deprecated
      partition engine. No need to do this during bootstrap. We ignore the
      return value from the query execution. Note that this must be done after
      NDB is initialized to avoid polluting the server with invalid table shares.
    */
    if (!opt_disable_partition_check)
    {
      sql_print_information(
              "Executing 'SELECT * FROM INFORMATION_SCHEMA.TABLES;' "
              "to get a list of tables using the deprecated partition "
              "engine.");

      sql_print_information("Beginning of list of non-natively partitioned tables");
      (void) bootstrap_single_query(
              "SELECT TABLE_SCHEMA, TABLE_NAME FROM INFORMATION_SCHEMA.TABLES "
              "WHERE CREATE_OPTIONS LIKE '%partitioned%';");
      sql_print_information("End of list of non-natively partitioned tables");
    }
  }

  /*
    Set opt_super_readonly here because if opt_super_readonly is set
    in get_option, it will create problem while setting up event scheduler.
  */
  set_super_read_only_post_init();

  DBUG_PRINT("info", ("Block, listening for incoming connections"));

  (void)MYSQL_SET_STAGE(0 ,__FILE__, __LINE__);

  server_operational_state= SERVER_OPERATING;

  (void) RUN_HOOK(server_state, before_handle_connection, (NULL));

#if defined(_WIN32)
  setup_conn_event_handler_threads();
#else
  mysql_mutex_lock(&LOCK_socket_listener_active);
  // Make it possible for the signal handler to kill the listener.
  socket_listener_active= true;
  mysql_mutex_unlock(&LOCK_socket_listener_active);

  if (opt_daemonize)
    mysqld::runtime::signal_parent(pipe_write_fd,1);

  mysqld_socket_acceptor->connection_event_loop();
#endif /* _WIN32 */
  server_operational_state= SERVER_SHUTTING_DOWN;

  DBUG_PRINT("info", ("No longer listening for incoming connections"));

  mysql_audit_notify(MYSQL_AUDIT_SERVER_SHUTDOWN_SHUTDOWN,
                     MYSQL_AUDIT_SERVER_SHUTDOWN_REASON_SHUTDOWN,
                     MYSQLD_SUCCESS_EXIT);

  terminate_compress_gtid_table_thread();
  /*
    Save set of GTIDs of the last binlog into gtid_executed table
    on server shutdown.
  */
  if (opt_bin_log)
    if (gtid_state->save_gtids_of_last_binlog_into_table(false))
      sql_print_warning("Failed to save the set of Global Transaction "
                        "Identifiers of the last binary log into the "
                        "mysql.gtid_executed table while the server was "
                        "shutting down. The next server restart will make "
                        "another attempt to save Global Transaction "
                        "Identifiers into the table.");

#ifndef _WIN32
  mysql_mutex_lock(&LOCK_socket_listener_active);
  // Notify the signal handler that we have stopped listening for connections.
  socket_listener_active= false;
  mysql_cond_broadcast(&COND_socket_listener_active);
  mysql_mutex_unlock(&LOCK_socket_listener_active);
#endif // !_WIN32

#ifdef HAVE_PSI_THREAD_INTERFACE
  /*
    Disable the main thread instrumentation,
    to avoid recording events during the shutdown.
  */
  PSI_THREAD_CALL(delete_current_thread)();
#endif

  DBUG_PRINT("info", ("Waiting for shutdown proceed"));
  int ret= 0;
#ifdef _WIN32
  if (shutdown_thr_handle.handle)
    ret= my_thread_join(&shutdown_thr_handle, NULL);
  shutdown_thr_handle.handle= NULL;
  if (0 != ret)
    sql_print_warning("Could not join shutdown thread. error:%d", ret);
#else
  if (signal_thread_id.thread != 0)
    ret= my_thread_join(&signal_thread_id, NULL);
  signal_thread_id.thread= 0;
  if (0 != ret)
    sql_print_warning("Could not join signal_thread. error:%d", ret);
#endif

  clean_up(1);
  mysqld_exit(MYSQLD_SUCCESS_EXIT);
}


/****************************************************************************
  Main and thread entry function for Win32
  (all this is needed only to run mysqld as a service on WinNT)
****************************************************************************/

#if defined(_WIN32)
int mysql_service(void *p)
{
  if (my_thread_init())
  {
    flush_error_log_messages();
    return 1;
  }

  if (use_opt_args)
    win_main(opt_argc, opt_argv);
  else
    win_main(Service.my_argc, Service.my_argv);

  my_thread_end();
  return 0;
}


/* Quote string if it contains space, else copy */

static char *add_quoted_string(char *to, const char *from, char *to_end)
{
  uint length= (uint) (to_end-to);

  if (!strchr(from, ' '))
    return strmake(to, from, length-1);
  return strxnmov(to, length-1, "\"", from, "\"", NullS);
}


/**
  Handle basic handling of services, like installation and removal.

  @param argv             Pointer to argument list
  @param servicename    Internal name of service
  @param displayname    Display name of service (in taskbar ?)
  @param file_path    Path to this program
  @param startup_option Startup option to mysqld

  @retval
    0   option handled
  @retval
    1   Could not handle option
*/

static bool
default_service_handling(char **argv,
       const char *servicename,
       const char *displayname,
       const char *file_path,
       const char *extra_opt,
       const char *account_name)
{
  char path_and_service[FN_REFLEN+FN_REFLEN+32], *pos, *end;
  const char *opt_delim;
  end= path_and_service + sizeof(path_and_service)-3;

  /* We have to quote filename if it contains spaces */
  pos= add_quoted_string(path_and_service, file_path, end);
  if (extra_opt && *extra_opt)
  {
    /*
     Add option after file_path. There will be zero or one extra option.  It's
     assumed to be --defaults-file=file but isn't checked.  The variable (not
     the option name) should be quoted if it contains a string.
    */
    *pos++= ' ';
    if (opt_delim= strchr(extra_opt, '='))
    {
      size_t length= ++opt_delim - extra_opt;
      pos= my_stpnmov(pos, extra_opt, length);
    }
    else
      opt_delim= extra_opt;

    pos= add_quoted_string(pos, opt_delim, end);
  }
  /* We must have servicename last */
  *pos++= ' ';
  (void) add_quoted_string(pos, servicename, end);

  if (Service.got_service_option(argv, "install"))
  {
    Service.Install(1, servicename, displayname, path_and_service,
                    account_name);
    return 0;
  }
  if (Service.got_service_option(argv, "install-manual"))
  {
    Service.Install(0, servicename, displayname, path_and_service,
                    account_name);
    return 0;
  }
  if (Service.got_service_option(argv, "remove"))
  {
    Service.Remove(servicename);
    return 0;
  }
  return 1;
}


int mysqld_main(int argc, char **argv)
{
  /*
    When several instances are running on the same machine, we
    need to have an  unique  named  hEventShudown  through the
    application PID e.g.: MySQLShutdown1890; MySQLShutdown2342
  */
  int10_to_str((int) GetCurrentProcessId(),my_stpcpy(shutdown_event_name,
                                                  "MySQLShutdown"), 10);

  /* Must be initialized early for comparison of service name */
  system_charset_info= &my_charset_utf8_general_ci;

#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
  pre_initialize_performance_schema();
#endif /*WITH_PERFSCHEMA_STORAGE_ENGINE */

  if (my_init())
  {
    sql_print_error("my_init() failed.");
    flush_error_log_messages();
    return 1;
  }

  if (Service.GetOS())  /* true NT family */
  {
    char file_path[FN_REFLEN];
    my_path(file_path, argv[0], "");          /* Find name in path */
    fn_format(file_path,argv[0],file_path,"",
              MY_REPLACE_DIR | MY_UNPACK_FILENAME | MY_RESOLVE_SYMLINKS);

    if (argc == 2)
    {
      if (!default_service_handling(argv, MYSQL_SERVICENAME, MYSQL_SERVICENAME,
                                    file_path, "", NULL))
        return 0;
      if (Service.IsService(argv[1]))        /* Start an optional service */
      {
        /*
          Only add the service name to the groups read from the config file
          if it's not "MySQL". (The default service name should be 'mysqld'
          but we started a bad tradition by calling it MySQL from the start
          and we are now stuck with it.
        */
        if (my_strcasecmp(system_charset_info, argv[1],"mysql"))
          load_default_groups[load_default_groups_sz-2]= argv[1];
        windows_service= true;
        Service.Init(argv[1], mysql_service);
        return 0;
      }
    }
    else if (argc == 3) /* install or remove any optional service */
    {
      if (!default_service_handling(argv, argv[2], argv[2], file_path, "",
                                    NULL))
        return 0;
      if (Service.IsService(argv[2]))
      {
        /*
          mysqld was started as
          mysqld --defaults-file=my_path\my.ini service-name
        */
        use_opt_args=1;
        opt_argc= 2;        // Skip service-name
        opt_argv=argv;
        windows_service= true;
        if (my_strcasecmp(system_charset_info, argv[2],"mysql"))
          load_default_groups[load_default_groups_sz-2]= argv[2];
        Service.Init(argv[2], mysql_service);
        return 0;
      }
    }
    else if (argc == 4 || argc == 5)
    {
      /*
        This may seem strange, because we handle --local-service while
        preserving 4.1's behavior of allowing any one other argument that is
        passed to the service on startup. (The assumption is that this is
        --defaults-file=file, but that was not enforced in 4.1, so we don't
        enforce it here.)
      */
      const char *extra_opt= NullS;
      const char *account_name = NullS;
      int index;
      for (index = 3; index < argc; index++)
      {
        if (!strcmp(argv[index], "--local-service"))
          account_name= "NT AUTHORITY\\LocalService";
        else
          extra_opt= argv[index];
      }

      if (argc == 4 || account_name)
        if (!default_service_handling(argv, argv[2], argv[2], file_path,
                                      extra_opt, account_name))
          return 0;
    }
    else if (argc == 1 && Service.IsService(MYSQL_SERVICENAME))
    {
      /* start the default service */
      windows_service= true;
      Service.Init(MYSQL_SERVICENAME, mysql_service);
      return 0;
    }
  }
  /* Start as standalone server */
  Service.my_argc=argc;
  Service.my_argv=argv;
  mysql_service(NULL);
  return 0;
}
#endif // _WIN32
#endif // !EMBEDDED_LIBRARY


static bool read_init_file(char *file_name)
{
  MYSQL_FILE *file;
  DBUG_ENTER("read_init_file");
  DBUG_PRINT("enter",("name: %s",file_name));

  sql_print_information("Execution of init_file \'%s\' started.", file_name);

  if (!(file= mysql_file_fopen(key_file_init, file_name,
                               O_RDONLY, MYF(MY_WME))))
    DBUG_RETURN(TRUE);
  (void) bootstrap(file);
  mysql_file_fclose(file, MYF(MY_WME));

  sql_print_information("Execution of init_file \'%s\' ended.", file_name);

  DBUG_RETURN(FALSE);
}


/****************************************************************************
  Handle start options
******************************************************************************/

/**
  Process command line options flagged as 'early'.
  Some components needs to be initialized as early as possible,
  because the rest of the server initialization depends on them.
  Options that needs to be parsed early includes:
  - the performance schema, when compiled in,
  - options related to the help,
  - options related to the bootstrap
  The performance schema needs to be initialized as early as possible,
  before to-be-instrumented objects of the server are initialized.
*/
int handle_early_options()
{
  int ho_error;
  vector<my_option> all_early_options;
  all_early_options.reserve(100);

  my_getopt_register_get_addr(NULL);
  /* Skip unknown options so that they may be processed later */
  my_getopt_skip_unknown= TRUE;

  /* Add the system variables parsed early */
  sys_var_add_options(&all_early_options, sys_var::PARSE_EARLY);

  /* Add the command line options parsed early */
  for (my_option *opt= my_long_early_options;
       opt->name != NULL;
       opt++)
    all_early_options.push_back(*opt);

  add_terminator(&all_early_options);

  my_getopt_error_reporter= option_error_reporter;
  my_charset_error_reporter= charset_error_reporter;

  ho_error= handle_options(&remaining_argc, &remaining_argv,
                           &all_early_options[0], mysqld_get_one_option);
  if (ho_error == 0)
  {
    /* Add back the program name handle_options removes */
    remaining_argc++;
    remaining_argv--;

    /* adjust the bootstrap options */
    if (opt_bootstrap)
    {
      sql_print_warning("--bootstrap is deprecated. "
                        "Please consider using --initialize instead");
    }
    if (opt_initialize_insecure)
      opt_initialize= TRUE;
    if (opt_initialize)
    {
      if (opt_bootstrap)
      {
        sql_print_error("Both --bootstrap and --initialize specified."
                        " Please pick one. Exiting.");
        ho_error= EXIT_AMBIGUOUS_OPTION;
      }
      opt_bootstrap= TRUE;
    }

    if (opt_debugging)
    {
      /* Allow break with SIGINT, no core or stack trace */
      test_flags|= TEST_SIGINT | TEST_NO_STACKTRACE;
      test_flags&= ~TEST_CORE_ON_SIGNAL;
    }
  }

  // Swap with an empty vector, i.e. delete elements and free allocated space.
  vector<my_option>().swap(all_early_options);

  return ho_error;
}

/**
  Adjust @c open_files_limit.
  Computation is  based on:
  - @c max_connections,
  - @c table_cache_size,
  - the platform max open file limit.
*/
void adjust_open_files_limit(ulong *requested_open_files)
{
  ulong limit_1;
  ulong limit_2;
  ulong limit_3;
  ulong request_open_files;
  ulong effective_open_files;

  /* MyISAM requires two file handles per table. */
  limit_1= 10 + max_connections + extra_max_connections + table_cache_size * 2;

  /*
    We are trying to allocate no less than max_connections*5 file
    handles (i.e. we are trying to set the limit so that they will
    be available).
  */
  limit_2= (max_connections + extra_max_connections) * 5;

  /* Try to allocate no less than 5000 by default. */
  limit_3= open_files_limit ? open_files_limit : 5000;

  request_open_files= max<ulong>(max<ulong>(limit_1, limit_2), limit_3);

  /* Notice: my_set_max_open_files() may return more than requested. */
  effective_open_files= my_set_max_open_files(request_open_files);

  if (effective_open_files < request_open_files)
  {
    if (open_files_limit == 0)
    {
      sql_print_warning("Changed limits: max_open_files: %lu (requested %lu)",
                        effective_open_files, request_open_files);
    }
    else
    {
      sql_print_warning("Could not increase number of max_open_files to "
                        "more than %lu (request: %lu)",
                        effective_open_files, request_open_files);
    }
  }

  open_files_limit= effective_open_files;
  if (requested_open_files)
    *requested_open_files= min<ulong>(effective_open_files, request_open_files);
}

void adjust_max_connections(ulong requested_open_files)
{
  ulong limit;

  limit= requested_open_files - 10 - TABLE_OPEN_CACHE_MIN * 2;

  if (limit < max_connections)
  {
    sql_print_warning("Changed limits: max_connections: %lu (requested %lu)",
                      limit, max_connections);

    // This can be done unprotected since it is only called on startup.
    max_connections= limit;
  }
}

void adjust_table_cache_size(ulong requested_open_files)
{
  ulong limit;

  limit= max<ulong>((requested_open_files - 10 - max_connections) / 2,
                    TABLE_OPEN_CACHE_MIN);

  if (limit < table_cache_size)
  {
    sql_print_warning("Changed limits: table_open_cache: %lu (requested %lu)",
                      limit, table_cache_size);

    table_cache_size= limit;
  }

  table_cache_size_per_instance= table_cache_size / table_cache_instances;
}

void adjust_table_def_size()
{
  ulong default_value;
  sys_var *var;

  default_value= min<ulong> (400 + table_cache_size / 2, 2000);
  var= intern_find_sys_var(STRING_WITH_LEN("table_definition_cache"));
  assert(var != NULL);
  var->update_default(default_value);

  if (! table_definition_cache_specified)
    table_def_size= default_value;
}

void adjust_related_options(ulong *requested_open_files)
{
  /* In bootstrap, disable grant tables (we are about to create them) */
  if (opt_bootstrap)
    opt_noacl= 1;

  /* The order is critical here, because of dependencies. */
  adjust_open_files_limit(requested_open_files);
  adjust_max_connections(*requested_open_files);
  adjust_table_cache_size(*requested_open_files);
  adjust_table_def_size();
}

vector<my_option> all_options;

struct my_option my_long_early_options[]=
{
  {"bootstrap", OPT_BOOTSTRAP, "Used by mysql installation scripts.", 0, 0, 0,
   GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
#if !defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
  {"daemonize", 0, "Run mysqld as sysv daemon", &opt_daemonize,
    &opt_daemonize, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0,0},
#endif
  {"skip-grant-tables", 0,
   "Start without grant tables. This gives all users FULL ACCESS to all tables.",
   &opt_noacl, &opt_noacl, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0,
   0},
  {"help", '?', "Display this help and exit.",
   &opt_help, &opt_help, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0,
   0, 0},
  {"verbose", 'v', "Used with --help option for detailed help.",
   &opt_verbose, &opt_verbose, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"version", 'V', "Output version information and exit.", 0, 0, 0, GET_NO_ARG,
   NO_ARG, 0, 0, 0, 0, 0, 0},
  {"initialize", 0, "Create the default database and exit."
   " Create a super user with a random expired password and store it into the log.",
   &opt_initialize, &opt_initialize, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"initialize-insecure", 0, "Create the default database and exit."
   " Create a super user with empty password.",
   &opt_initialize_insecure, &opt_initialize_insecure, 0, GET_BOOL, NO_ARG,
   0, 0, 0, 0, 0, 0},
  {"disable-partition-engine-check", 0,
   "Skip the check for non-natively partitioned tables during bootstrap. "
   "This option is deprecated along with the partition engine.",
   &opt_disable_partition_check, &opt_disable_partition_check, 0, GET_BOOL,
   NO_ARG, TRUE, 0, 0, 0, 0, 0},
  {"keyring-migration-source", OPT_KEYRING_MIGRATION_SOURCE,
   "Keyring plugin from where the keys needs to "
   "be migrated to. This option must be specified along with "
   "--keyring-migration-destination.",
   &opt_keyring_migration_source, &opt_keyring_migration_source,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"keyring-migration-destination", OPT_KEYRING_MIGRATION_DESTINATION,
   "Keyring plugin to which the keys are "
   "migrated to. This option must be specified along with "
   "--keyring-migration-source.",
   &opt_keyring_migration_destination, &opt_keyring_migration_destination,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"keyring-migration-user", OPT_KEYRING_MIGRATION_USER,
   "User to login to server.",
   &opt_keyring_migration_user, &opt_keyring_migration_user,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"keyring-migration-host", OPT_KEYRING_MIGRATION_HOST, "Connect to host.",
   &opt_keyring_migration_host, &opt_keyring_migration_host,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"keyring-migration-password", OPT_KEYRING_MIGRATION_PASSWORD,
   "Password to use when connecting to server during keyring migration. "
   "If password value is not specified then it will be asked from the tty.",
   0, 0, 0, GET_PASSWORD, OPT_ARG, 0, 0, 0, 0, 0, 0},
  {"keyring-migration-socket", OPT_KEYRING_MIGRATION_SOCKET,
   "The socket file to use for connection.",
   &opt_keyring_migration_socket, &opt_keyring_migration_socket,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"keyring-migration-port", OPT_KEYRING_MIGRATION_PORT,
   "Port number to use for connection.",
   &opt_keyring_migration_port, &opt_keyring_migration_port,
   0, GET_ULONG, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"core-file", OPT_WANT_CORE,
   "Write core on errors.",
   0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"coredumper", OPT_COREDUMPER,
    "Use coredumper library to generate coredumps. Specify a path for coredump "
    "otherwise it will be generated on datadir",
    &opt_libcoredumper_path, &opt_libcoredumper_path, 0, GET_STR,
    OPT_ARG, 0, 0, 0, 0, 0, 0},
  {"skip-stack-trace", OPT_SKIP_STACK_TRACE,
   "Don't print a stack trace on failure.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0,
   0, 0, 0, 0},
  {"gdb", 0,
   "Set up signals usable for debugging.",
   &opt_debugging, &opt_debugging,
   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0 }
};

/**
  System variables are automatically command-line options (few
  exceptions are documented in sys_var.h), so don't need
  to be listed here.
*/

struct my_option my_long_options[]=
{
#ifdef HAVE_REPLICATION
  {"abort-slave-event-count", 0,
   "Option used by mysql-test for debugging and testing of replication.",
   &abort_slave_event_count,  &abort_slave_event_count,
   0, GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
#endif /* HAVE_REPLICATION */
  {"allow-suspicious-udfs", 0,
   "Allows use of UDFs consisting of only one symbol xxx() "
   "without corresponding xxx_init() or xxx_deinit(). That also means "
   "that one can load any function from any library, for example exit() "
   "from libc.so",
   &opt_allow_suspicious_udfs, &opt_allow_suspicious_udfs,
   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"ansi", 'a', "Use ANSI SQL syntax instead of MySQL syntax. This mode "
   "will also set transaction isolation level 'serializable'.", 0, 0, 0,
   GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
  /*
    Because Sys_var_bit does not support command-line options, we need to
    explicitely add one for --autocommit
  */
  {"autocommit", 0, "Set default value for autocommit (0 or 1)",
   &opt_autocommit, &opt_autocommit, 0,
   GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, NULL},
  {"binlog-do-db", OPT_BINLOG_DO_DB,
   "Tells the master it should log updates for the specified database, "
   "and exclude all others not explicitly mentioned.",
   0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"binlog-ignore-db", OPT_BINLOG_IGNORE_DB,
   "Tells the master that updates to the given database should not be logged to the binary log.",
   0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"binlog-row-event-max-size", 0,
   "The maximum size of a row-based binary log event in bytes. Rows will be "
   "grouped into events smaller than this size if possible. "
   "The value has to be a multiple of 256.",
   &opt_binlog_rows_event_max_size, &opt_binlog_rows_event_max_size,
   0, GET_ULONG, REQUIRED_ARG,
   /* def_value */ 8192, /* min_value */  256, /* max_value */ ULONG_MAX,
   /* sub_size */     0, /* block_size */ 256,
   /* app_type */ 0
  },
  {"character-set-client-handshake", 0,
   "Don't ignore client side character set value sent during handshake.",
   &opt_character_set_client_handshake,
   &opt_character_set_client_handshake,
    0, GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0},
  {"character-set-filesystem", 0,
   "Set the filesystem character set.",
   &character_set_filesystem_name,
   &character_set_filesystem_name,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  {"character-set-server", 'C', "Set the default character set.",
   &default_character_set_name, &default_character_set_name,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  {"chroot", 'r', "Chroot mysqld daemon during startup.",
   &mysqld_chroot, &mysqld_chroot, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0},
  {"collation-server", 0, "Set the default collation.",
   &default_collation_name, &default_collation_name,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  {"console", OPT_CONSOLE, "Write error output on screen; don't remove the console window on windows.",
   &opt_console, &opt_console, 0, GET_BOOL, NO_ARG, 0, 0, 0,
   0, 0, 0},
  /* default-storage-engine should have "MyISAM" as def_value. Instead
     of initializing it here it is done in init_common_variables() due
     to a compiler bug in Sun Studio compiler. */
  {"default-storage-engine", 0, "The default storage engine for new tables",
   &default_storage_engine, 0, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0 },
  {"default-tmp-storage-engine", 0,
    "The default storage engine for new explict temporary tables",
   &default_tmp_storage_engine, 0, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0 },
  {"default-time-zone", 0, "Set the default time zone.",
   &default_tz_name, &default_tz_name,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
#ifdef HAVE_OPENSSL
  {"des-key-file", 0,
   "Load keys for des_encrypt() and des_encrypt from given file.",
   &des_key_file, &des_key_file, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0},
#endif /* HAVE_OPENSSL */
#ifdef HAVE_REPLICATION
  {"disconnect-slave-event-count", 0,
   "Option used by mysql-test for debugging and testing of replication.",
   &disconnect_slave_event_count, &disconnect_slave_event_count,
   0, GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
#endif /* HAVE_REPLICATION */
  {"exit-info", 'T', "Used for debugging. Use at your own risk.", 0, 0, 0,
   GET_LONG, OPT_ARG, 0, 0, 0, 0, 0, 0},

  {"external-locking", 0, "Use system (external) locking (disabled by "
   "default).  With this option enabled you can run myisamchk to test "
   "(not repair) tables while the MySQL server is running. Disable with "
   "--skip-external-locking.", &opt_external_locking, &opt_external_locking,
   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  /* We must always support the next option to make scripts like mysqltest
     easier to do */
#if defined(HAVE_LINUX_LARGE_PAGES) || defined (HAVE_SOLARIS_LARGE_PAGES)
  {"super-large-pages", 0, "Enable support for super large pages.",
   &opt_super_large_pages, &opt_super_large_pages, 0,
   GET_BOOL, OPT_ARG, 0, 0, 1, 0, 1, 0},
#endif
  {"ignore-db-dir", OPT_IGNORE_DB_DIRECTORY,
   "Specifies a directory to add to the ignore list when collecting "
   "database names from the datadir. Put a blank argument to reset "
   "the list accumulated so far.", 0, 0, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0},
  {"language", 'L',
   "Client error messages in given language. May be given as a full path. "
   "Deprecated. Use --lc-messages-dir instead.",
   &lc_messages_dir_ptr, &lc_messages_dir_ptr, 0,
   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"lc-messages", 0,
   "Set the language used for the error messages.",
   &lc_messages, &lc_messages, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0 },
  {"lc-time-names", 0,
   "Set the language used for the month names and the days of the week.",
   &lc_time_names_name, &lc_time_names_name,
   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  {"log-bin", OPT_BIN_LOG,
   "Log update queries in binary format. Optional (but strongly recommended "
   "to avoid replication problems if server's hostname changes) argument "
   "should be the chosen location for the binary log files.",
   &opt_bin_logname, &opt_bin_logname, 0, GET_STR_ALLOC,
   OPT_ARG, 0, 0, 0, 0, 0, 0},
  {"log-bin-index", 0,
   "File that holds the names for binary log files.",
   &opt_binlog_index_name, &opt_binlog_index_name, 0, GET_STR,
   REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"relay-log-index", 0,
   "File that holds the names for relay log files.",
   &opt_relaylog_index_name, &opt_relaylog_index_name, 0, GET_STR,
   REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"log-isam", OPT_ISAM_LOG, "Log all MyISAM changes to file.",
   &myisam_log_filename, &myisam_log_filename, 0, GET_STR,
   OPT_ARG, 0, 0, 0, 0, 0, 0},
  {"log-raw", 0,
   "Log to general log before any rewriting of the query. For use in debugging, not production as "
   "sensitive information may be logged.",
   &opt_general_log_raw, &opt_general_log_raw,
   0, GET_BOOL, NO_ARG, 0, 0, 1, 0, 1, 0 },
  {"log-short-format", 0,
   "Don't log extra information to update and slow-query logs.",
   &opt_short_log_format, &opt_short_log_format,
   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"log-tc", 0,
   "Path to transaction coordinator log (used for transactions that affect "
   "more than one storage engine, when binary log is disabled).",
   &opt_tc_log_file, &opt_tc_log_file, 0, GET_STR,
   REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"log-tc-size", 0, "Size of transaction coordinator log.",
   &opt_tc_log_size, &opt_tc_log_size, 0, GET_ULONG,
   REQUIRED_ARG, TC_LOG_MIN_PAGES * my_getpagesize(),
   TC_LOG_MIN_PAGES * my_getpagesize(), ULONG_MAX, 0,
   my_getpagesize(), 0},
  {"master-info-file", 0,
   "The location and name of the file that remembers the master and where "
   "the I/O replication thread is in the master's binlogs.",
   &master_info_file, &master_info_file, 0, GET_STR,
   REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"master-retry-count", OPT_MASTER_RETRY_COUNT,
   "The number of tries the slave will make to connect to the master before giving up. "
   "Deprecated option, use 'CHANGE MASTER TO master_retry_count = <num>' instead.",
   &master_retry_count, &master_retry_count, 0, GET_ULONG,
   REQUIRED_ARG, 3600*24, 0, 0, 0, 0, 0},
#ifdef HAVE_REPLICATION
  {"max-binlog-dump-events", 0,
   "Option used by mysql-test for debugging and testing of replication.",
   &max_binlog_dump_events, &max_binlog_dump_events, 0,
   GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
#endif /* HAVE_REPLICATION */
  {"memlock", 0, "Lock mysqld in memory.", &locked_in_memory,
   &locked_in_memory, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"old-style-user-limits", 0,
   "Enable old-style user limits (before 5.0.3, user resources were counted "
   "per each user+host vs. per account).",
   &opt_old_style_user_limits, &opt_old_style_user_limits,
   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"port-open-timeout", 0,
   "Maximum time in seconds to wait for the port to become free. "
   "(Default: No wait).", &mysqld_port_timeout, &mysqld_port_timeout, 0,
   GET_UINT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"replicate-do-db", OPT_REPLICATE_DO_DB,
   "Tells the slave thread to restrict replication to the specified database. "
   "To specify more than one database, use the directive multiple times, "
   "once for each database. Note that this will only work if you do not use "
   "cross-database queries such as UPDATE some_db.some_table SET foo='bar' "
   "while having selected a different or no database. If you need cross "
   "database updates to work, make sure you have 3.23.28 or later, and use "
   "replicate-wild-do-table=db_name.%.",
   0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"replicate-do-table", OPT_REPLICATE_DO_TABLE,
   "Tells the slave thread to restrict replication to the specified table. "
   "To specify more than one table, use the directive multiple times, once "
   "for each table. This will work for cross-database updates, in contrast "
   "to replicate-do-db.", 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"replicate-ignore-db", OPT_REPLICATE_IGNORE_DB,
   "Tells the slave thread to not replicate to the specified database. To "
   "specify more than one database to ignore, use the directive multiple "
   "times, once for each database. This option will not work if you use "
   "cross database updates. If you need cross database updates to work, "
   "make sure you have 3.23.28 or later, and use replicate-wild-ignore-"
   "table=db_name.%. ", 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"replicate-ignore-table", OPT_REPLICATE_IGNORE_TABLE,
   "Tells the slave thread to not replicate to the specified table. To specify "
   "more than one table to ignore, use the directive multiple times, once for "
   "each table. This will work for cross-database updates, in contrast to "
   "replicate-ignore-db.", 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"replicate-rewrite-db", OPT_REPLICATE_REWRITE_DB,
   "Updates to a database with a different name than the original. Example: "
   "replicate-rewrite-db=master_db_name->slave_db_name.",
   0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
#ifdef HAVE_REPLICATION
  {"replicate-same-server-id", 0,
   "In replication, if set to 1, do not skip events having our server id. "
   "Default value is 0 (to break infinite loops in circular replication). "
   "Can't be set to 1 if --log-slave-updates is used.",
   &replicate_same_server_id, &replicate_same_server_id,
   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
#endif
  {"replicate-wild-do-table", OPT_REPLICATE_WILD_DO_TABLE,
   "Tells the slave thread to restrict replication to the tables that match "
   "the specified wildcard pattern. To specify more than one table, use the "
   "directive multiple times, once for each table. This will work for cross-"
   "database updates. Example: replicate-wild-do-table=foo%.bar% will "
   "replicate only updates to tables in all databases that start with foo "
   "and whose table names start with bar.",
   0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"replicate-wild-ignore-table", OPT_REPLICATE_WILD_IGNORE_TABLE,
   "Tells the slave thread to not replicate to the tables that match the "
   "given wildcard pattern. To specify more than one table to ignore, use "
   "the directive multiple times, once for each table. This will work for "
   "cross-database updates. Example: replicate-wild-ignore-table=foo%.bar% "
   "will not do updates to tables in databases that start with foo and whose "
   "table names start with bar.",
   0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"safe-user-create", 0,
   "Don't allow new user creation by the user who has no write privileges to the mysql.user table.",
   &opt_safe_user_create, &opt_safe_user_create, 0, GET_BOOL,
   NO_ARG, 0, 0, 0, 0, 0, 0},
  {"show-slave-auth-info", 0,
   "Show user and password in SHOW SLAVE HOSTS on this master.",
   &opt_show_slave_auth_info, &opt_show_slave_auth_info, 0,
   GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"skip-host-cache", OPT_SKIP_HOST_CACHE, "Don't cache host names.", 0, 0, 0,
   GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"skip-new", OPT_SKIP_NEW, "Don't use new, possibly wrong routines.",
   0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
  {"skip-slave-start", 0,
   "If set, slave is not autostarted.", &opt_skip_slave_start,
   &opt_skip_slave_start, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
  {"slow-start-timeout", 0,
   "Maximum number of milliseconds that the service control manager should wait "
   "before trying to kill the windows service during startup"
   "(Default: 15000).", &slow_start_timeout, &slow_start_timeout, 0,
   GET_ULONG, REQUIRED_ARG, 15000, 0, 0, 0, 0, 0},
#endif
#ifdef HAVE_REPLICATION
  {"sporadic-binlog-dump-fail", 0,
   "Option used by mysql-test for debugging and testing of replication.",
   &opt_sporadic_binlog_dump_fail,
   &opt_sporadic_binlog_dump_fail, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0,
   0},
#endif /* HAVE_REPLICATION */
#ifdef HAVE_OPENSSL
  {"ssl", 0,
   "Enable SSL for connection (automatically enabled with other flags).",
   &opt_use_ssl, &opt_use_ssl, 0, GET_BOOL, OPT_ARG, 1, 0, 0,
   0, 0, 0},
#endif
#ifdef _WIN32
  {"standalone", 0,
  "Dummy option to start as a standalone program (NT).", 0, 0, 0, GET_NO_ARG,
   NO_ARG, 0, 0, 0, 0, 0, 0},
#endif
  {"symbolic-links", 's', "Enable symbolic link support.",
   &my_enable_symlinks, &my_enable_symlinks, 0, GET_BOOL, NO_ARG,
   1, 0, 0, 0, 0, 0},
  {"sysdate-is-now", 0,
   "Non-default option to alias SYSDATE() to NOW() to make it safe-replicable. "
   "Since 5.0, SYSDATE() returns a `dynamic' value different for different "
   "invocations, even within the same statement.",
   &global_system_variables.sysdate_is_now,
   0, 0, GET_BOOL, NO_ARG, 0, 0, 1, 0, 1, 0},
  {"tc-heuristic-recover", 0,
   "Decision to use in heuristic recover process. Possible values are OFF, "
   "COMMIT or ROLLBACK.", &tc_heuristic_recover, &tc_heuristic_recover,
   &tc_heuristic_recover_typelib, GET_ENUM, REQUIRED_ARG,
   TC_HEURISTIC_NOT_USED, 0, 0, 0, 0, 0},
#if defined(ENABLED_DEBUG_SYNC)
  {"debug-sync-timeout", OPT_DEBUG_SYNC_TIMEOUT,
   "Enable the debug sync facility "
   "and optionally specify a default wait timeout in seconds. "
   "A zero value keeps the facility disabled.",
   &opt_debug_sync_timeout, 0,
   0, GET_UINT, OPT_ARG, 0, 0, UINT_MAX, 0, 0, 0},
#endif /* defined(ENABLED_DEBUG_SYNC) */
  {"temp-pool", 0,
   "This option is deprecated and will be removed in a future version. "
#if defined(__linux__)
   "Using this option will cause most temporary files created to use a small "
   "set of names, rather than a unique name for each new file.",
#else
   "This option is ignored on this OS.",
#endif
   &use_temp_pool, &use_temp_pool, 0, GET_BOOL, NO_ARG, 1,
   0, 0, 0, 0, 0},
  {"transaction-isolation", OPT_TRANSACTION_ISOLATION,
   "Default transaction isolation level.",
   &global_system_variables.tx_isolation,
   &global_system_variables.tx_isolation, &tx_isolation_typelib,
   GET_ENUM, REQUIRED_ARG, ISO_REPEATABLE_READ, 0, 0, 0, 0, 0},
  {"transaction-read-only", OPT_TRANSACTION_READ_ONLY,
   "Default transaction access mode. "
   "True if transactions are read-only.",
   &global_system_variables.tx_read_only,
   &global_system_variables.tx_read_only, 0,
   GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0},
  {"user", 'u', "Run mysqld daemon as user.", 0, 0, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0},
  {"early-plugin-load", OPT_EARLY_PLUGIN_LOAD,
   "Optional semicolon-separated list of plugins to load before storage engine "
   "initialization, where each plugin is identified as name=library, where "
   "name is the plugin name and library is the plugin library in plugin_dir.",
   0, 0, 0,
   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"plugin-load", OPT_PLUGIN_LOAD,
   "Optional semicolon-separated list of plugins to load, where each plugin is "
   "identified as name=library, where name is the plugin name and library "
   "is the plugin library in plugin_dir.",
   0, 0, 0,
   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"plugin-load-add", OPT_PLUGIN_LOAD_ADD,
   "Optional semicolon-separated list of plugins to load, where each plugin is "
   "identified as name=library, where name is the plugin name and library "
   "is the plugin library in plugin_dir. This option adds to the list "
   "specified by --plugin-load in an incremental way. "
   "Multiple --plugin-load-add are supported.",
   0, 0, 0,
   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},

  {"innodb", OPT_SKIP_INNODB,
   "Deprecated option. Provided for backward compatibility only. "
   "The option has no effect on the server behaviour. InnoDB is always enabled. "
   "The option will be removed in a future release.",
   0, 0, 0, GET_BOOL, OPT_ARG,
   0, 0, 0, 0, 0, 0},

  {"utility_user", 0, "Specifies a MySQL user that will be added to the "
    "internal list of users and recognized as the utility user.",
    &utility_user, 0, 0, GET_STR, REQUIRED_ARG,
    0, 0, 0, 0, 0, 0},
  {"utility_user_password", 0, "Specifies the password required for the "
   "utility user.",
   &utility_user_password, 0, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0},
  {"utility_user_privileges", 0, "Specifies the privileges that the utility "
   "user will have in a comma delimited list. See the manual for a complete "
   "list of privileges.",
   &utility_user_privileges, 0, &utility_user_privileges_typelib,
   GET_SET, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  {"utility_user_schema_access", 0, "Specifies the schemas that the utility "
   "user has access to in a comma delimited list.",
   &utility_user_schema_access, 0, 0, GET_STR, REQUIRED_ARG,
   0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
};


static int show_queries(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONGLONG;
  var->value= (char *)&thd->query_id;
  return 0;
}


static int show_net_compression(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_MY_BOOL;
  var->value= buff;
  *((bool *)buff)= thd->get_protocol()->get_compression();
  return 0;
}

static int show_starttime(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONGLONG;
  var->value= buff;
  *((longlong *)buff)= (longlong) (thd->query_start() - server_start_time);
  return 0;
}

static int show_max_used_connections_time(THD *thd, SHOW_VAR *var, char *buff)
{
  MYSQL_TIME max_used_connections_time;
  var->type= SHOW_CHAR;
  var->value= buff;
  thd->variables.time_zone->gmt_sec_to_TIME(&max_used_connections_time,
    Connection_handler_manager::max_used_connections_time);
  my_datetime_to_str(&max_used_connections_time, buff, 0);
  return 0;
}

static int show_num_thread_running(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONGLONG;
  var->value= buff;
  long long *value= reinterpret_cast<long long*>(buff);
  *value= static_cast<long long>(Global_THD_manager::get_instance()->
                                 get_num_thread_running());
  return 0;
}


static int show_num_thread_created(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  long *value= reinterpret_cast<long*>(buff);
  *value= static_cast<long>(Global_THD_manager::get_instance()->
                            get_num_thread_created());
  return 0;
}

static int show_thread_id_count(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  long *value= reinterpret_cast<long*>(buff);
  *value= static_cast<long>(Global_THD_manager::get_instance()->
                            get_thread_id());
  return 0;
}


#ifndef EMBEDDED_LIBRARY
static int show_aborted_connects(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  long *value= reinterpret_cast<long*>(buff);
  *value= static_cast<long>(Connection_handler_manager::get_instance()->
                            aborted_connects());
  return 0;
}


static int show_connection_errors_max_connection(THD *thd, SHOW_VAR *var,
                                                 char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  long *value= reinterpret_cast<long*>(buff);
  *value= static_cast<long>(Connection_handler_manager::get_instance()->
                            connection_errors_max_connection());
  return 0;
}

static int show_connection_errors_select(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  long *value= reinterpret_cast<long*>(buff);
  *value=
    static_cast<long>(Mysqld_socket_listener::get_connection_errors_select());
  return 0;
}

static int show_connection_errors_accept(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  long *value= reinterpret_cast<long*>(buff);
  *value=
    static_cast<long>(Mysqld_socket_listener::get_connection_errors_accept());
  return 0;
}

static int show_connection_errors_tcpwrap(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  long *value= reinterpret_cast<long*>(buff);
  *value=
    static_cast<long>(Mysqld_socket_listener::get_connection_errors_tcpwrap());
  return 0;
}
#endif


#ifdef ENABLED_PROFILING
static int show_flushstatustime(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONGLONG;
  var->value= buff;
  *((longlong *)buff)= (longlong) (thd->query_start() - flush_status_time);
  return 0;
}
#endif

#ifdef HAVE_REPLICATION
/**
  After Multisource replication, this function only shows the value
  of default channel.

  To know the status of other channels, performance schema replication
  tables comes to the rescue.

  @TODO: any warning needed if multiple channels exist to request
         the users to start using replication performance schema
         tables.
*/
static int show_slave_running(THD *thd, SHOW_VAR *var, char *buff)
{
  channel_map.rdlock();
  Master_info *mi= channel_map.get_default_channel_mi();

  if (mi)
  {
    var->type= SHOW_MY_BOOL;
    var->value= buff;
    *((my_bool *)buff)= (my_bool) (mi &&
                                   mi->slave_running == MYSQL_SLAVE_RUN_CONNECT &&
                                   mi->rli->slave_running);
  }
  else
    var->type= SHOW_UNDEF;

  channel_map.unlock();
  return 0;
}


/**
  This status variable is also exclusively (look comments on
  show_slave_running()) for default channel.
*/
static int show_slave_retried_trans(THD *thd, SHOW_VAR *var, char *buff)
{
  channel_map.rdlock();
  Master_info *mi= channel_map.get_default_channel_mi();

  if (mi)
  {
    var->type= SHOW_LONG;
    var->value= buff;
    *((long *)buff)= (long)mi->rli->retried_trans;
  }
  else
    var->type= SHOW_UNDEF;

  channel_map.unlock();
  return 0;
}

/**
  Only for default channel. Refer to comments on show_slave_running()
*/
static int show_slave_received_heartbeats(THD *thd, SHOW_VAR *var, char *buff)
{
  channel_map.rdlock();
  Master_info *mi= channel_map.get_default_channel_mi();

  if (mi)
  {
    var->type= SHOW_LONGLONG;
    var->value= buff;
    *((longlong *)buff)= mi->received_heartbeats;
  }
  else
    var->type= SHOW_UNDEF;

  channel_map.unlock();
  return 0;
}

/**
  Only for default channel. Refer to comments on show_slave_running()
*/
static int show_slave_last_heartbeat(THD *thd, SHOW_VAR *var, char *buff)
{
  MYSQL_TIME received_heartbeat_time;

  channel_map.rdlock();
  Master_info *mi= channel_map.get_default_channel_mi();

  if (mi)
  {
    var->type= SHOW_CHAR;
    var->value= buff;
    if (mi->last_heartbeat == 0)
      buff[0]='\0';
    else
    {
      thd->variables.time_zone->gmt_sec_to_TIME(&received_heartbeat_time,
        static_cast<my_time_t>(mi->last_heartbeat));
      my_datetime_to_str(&received_heartbeat_time, buff, 0);
    }
  }
  else
    var->type= SHOW_UNDEF;

  channel_map.unlock();
  return 0;
}

/**
  Only for default channel. For details, refer to show_slave_running()
*/
static int show_heartbeat_period(THD *thd, SHOW_VAR *var, char *buff)
{
  DEBUG_SYNC(thd, "dsync_show_heartbeat_period");

  channel_map.rdlock();
  Master_info *mi= channel_map.get_default_channel_mi();

  if (mi)
  {
    var->type= SHOW_CHAR;
    var->value= buff;
    sprintf(buff, "%.3f", mi->heartbeat_period);
  }
  else
    var->type= SHOW_UNDEF;

  channel_map.unlock();
  return 0;
}

#ifndef NDEBUG
static int show_slave_rows_last_search_algorithm_used(THD *thd, SHOW_VAR *var, char *buff)
{
  uint res= slave_rows_last_search_algorithm_used;
  const char* s= ((res == Rows_log_event::ROW_LOOKUP_TABLE_SCAN) ? "TABLE_SCAN" :
                  ((res == Rows_log_event::ROW_LOOKUP_HASH_SCAN) ? "HASH_SCAN" :
                   "INDEX_SCAN"));

  var->type= SHOW_CHAR;
  var->value= buff;
  sprintf(buff, "%s", s);

  return 0;
}

static int show_ongoing_automatic_gtid_violating_transaction_count(
  THD *thd, SHOW_VAR *var, char *buf)
{
  var->type= SHOW_CHAR;
  var->value= buf;
  sprintf(buf, "%d",
          gtid_state->get_automatic_gtid_violating_transaction_count());
  return 0;
}

static int show_ongoing_anonymous_gtid_violating_transaction_count(
  THD *thd, SHOW_VAR *var, char *buf)
{
  var->type= SHOW_CHAR;
  var->value= buf;
  sprintf(buf, "%d",
          gtid_state->get_anonymous_gtid_violating_transaction_count());
  return 0;
}

#endif

static int show_ongoing_anonymous_transaction_count(
  THD *thd, SHOW_VAR *var, char *buf)
{
  var->type= SHOW_CHAR;
  var->value= buf;
  sprintf(buf, "%d", gtid_state->get_anonymous_ownership_count());
  return 0;
}

#endif /* HAVE_REPLICATION */

static int show_open_tables(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (long)table_cache_manager.cached_tables();
  return 0;
}

static int show_prepared_stmt_count(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  mysql_mutex_lock(&LOCK_prepared_stmt_count);
  *((long *)buff)= (long)prepared_stmt_count;
  mysql_mutex_unlock(&LOCK_prepared_stmt_count);
  return 0;
}

static int show_table_definitions(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (long)cached_table_definitions();
  return 0;
}

#if defined(HAVE_OPENSSL) && !defined(EMBEDDED_LIBRARY)
/* Functions relying on CTX */
static int show_ssl_ctx_sess_accept(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_accept(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_accept_good(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_accept_good(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_connect_good(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_connect_good(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_accept_renegotiate(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_accept_renegotiate(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_connect_renegotiate(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_connect_renegotiate(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_cb_hits(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_cb_hits(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_hits(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_hits(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_cache_full(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_cache_full(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_misses(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_misses(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_timeouts(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_timeouts(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_number(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_number(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_connect(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_connect(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_sess_get_cache_size(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_sess_get_cache_size(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_get_verify_mode(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_get_verify_mode(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_get_verify_depth(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_LONG;
  var->value= buff;
  *((long *)buff)= (!ssl_acceptor_fd ? 0 :
                     SSL_CTX_get_verify_depth(ssl_acceptor_fd->ssl_context));
  return 0;
}

static int show_ssl_ctx_get_session_cache_mode(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_CHAR;
  if (!ssl_acceptor_fd)
    var->value= const_cast<char*>("NONE");
  else
    switch (SSL_CTX_get_session_cache_mode(ssl_acceptor_fd->ssl_context))
    {
    case SSL_SESS_CACHE_OFF:
      var->value= const_cast<char*>("OFF"); break;
    case SSL_SESS_CACHE_CLIENT:
      var->value= const_cast<char*>("CLIENT"); break;
    case SSL_SESS_CACHE_SERVER:
      var->value= const_cast<char*>("SERVER"); break;
    case SSL_SESS_CACHE_BOTH:
      var->value= const_cast<char*>("BOTH"); break;
    case SSL_SESS_CACHE_NO_AUTO_CLEAR:
      var->value= const_cast<char*>("NO_AUTO_CLEAR"); break;
    case SSL_SESS_CACHE_NO_INTERNAL_LOOKUP:
      var->value= const_cast<char*>("NO_INTERNAL_LOOKUP"); break;
    default:
      var->value= const_cast<char*>("Unknown"); break;
    }
  return 0;
}

/*
   Functions relying on SSL
   Note: In the show_ssl_* functions, we need to check if we have a
         valid vio-object since this isn't always true, specifically
         when session_status or global_status is requested from
         inside an Event.
 */
static int show_ssl_get_version(THD *thd, SHOW_VAR *var, char *buff)
{
  SSL_handle ssl = thd->get_ssl();
  var->type= SHOW_CHAR;
  if (ssl)
    var->value=
      const_cast<char*>(SSL_get_version(ssl));
  else
    var->value= (char *)"";
  return 0;
}

static int show_ssl_session_reused(THD *thd, SHOW_VAR *var, char *buff)
{
  SSL_handle ssl = thd->get_ssl();
  var->type= SHOW_LONG;
  var->value= buff;
  if (ssl)
    *((long *)buff)=
        (long)SSL_session_reused(ssl);
  else
    *((long *)buff)= 0;
  return 0;
}

static int show_ssl_get_default_timeout(THD *thd, SHOW_VAR *var, char *buff)
{
  SSL_handle ssl = thd->get_ssl();
  var->type= SHOW_LONG;
  var->value= buff;
  if (ssl)
    *((long *)buff)=
      (long)SSL_get_default_timeout(ssl);
  else
    *((long *)buff)= 0;
  return 0;
}

static int show_ssl_get_verify_mode(THD *thd, SHOW_VAR *var, char *buff)
{
  SSL_handle ssl = thd->get_ssl();
  var->type= SHOW_LONG;
  var->value= buff;
  if (ssl)
    *((long *)buff)=
      (long)SSL_get_verify_mode(ssl);
  else
    *((long *)buff)= 0;
  return 0;
}

static int show_ssl_get_verify_depth(THD *thd, SHOW_VAR *var, char *buff)
{
  SSL_handle ssl = thd->get_ssl();
  var->type= SHOW_LONG;
  var->value= buff;
  if (ssl)
    *((long *)buff)=
        (long)SSL_get_verify_depth(ssl);
  else
    *((long *)buff)= 0;
  return 0;
}

static int show_ssl_get_cipher(THD *thd, SHOW_VAR *var, char *buff)
{
  SSL_handle ssl = thd->get_ssl();
  var->type= SHOW_CHAR;
  if (ssl)
    var->value=
      const_cast<char*>(SSL_get_cipher(ssl));
  else
    var->value= (char *)"";
  return 0;
}

static int show_ssl_get_cipher_list(THD *thd, SHOW_VAR *var, char *buff)
{
  SSL_handle ssl = thd->get_ssl();
  var->type= SHOW_CHAR;
  var->value= buff;
  if (ssl)
  {
    int i;
    const char *p;
    char *end= buff + SHOW_VAR_FUNC_BUFF_SIZE;
    for (i=0; (p= SSL_get_cipher_list(ssl,i)) &&
               buff < end; i++)
    {
      buff= my_stpnmov(buff, p, end-buff-1);
      *buff++= ':';
    }
    if (i)
      buff--;
  }
  *buff=0;
  return 0;
}


static char *
my_asn1_time_to_string(ASN1_TIME *time, char *buf, size_t len)
{
  int n_read;
  char *res= NULL;
  BIO *bio= BIO_new(BIO_s_mem());

  if (bio == NULL)
    return NULL;

  if (!ASN1_TIME_print(bio, time))
    goto end;

  n_read= BIO_read(bio, buf, (int) (len - 1));

  if (n_read > 0)
  {
    buf[n_read]= 0;
    res= buf;
  }

end:
  BIO_free(bio);
  return res;
}


/**
  Handler function for the 'ssl_get_server_not_before' variable

  @param      thd  the mysql thread structure
  @param      var  the data for the variable
  @param[out] buf  the string to put the value of the variable into

  @return          status
  @retval     0    success
*/

static int
show_ssl_get_server_not_before(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_CHAR;
  if (ssl_acceptor_fd)
  {
    X509 *cert= SSL_get_certificate(ssl_acceptor);
    ASN1_TIME *not_before= X509_get_notBefore(cert);

    if (not_before == NULL)
    {
      var->value= empty_c_string;
      return 0;
    }

    var->value= my_asn1_time_to_string(not_before, buff,
                                       SHOW_VAR_FUNC_BUFF_SIZE);
    if (var->value == NULL)
    {
      var->value= empty_c_string;
      return 1;
    }
  }
  else
    var->value= empty_c_string;
  return 0;
}


/**
  Handler function for the 'ssl_get_server_not_after' variable

  @param      thd  the mysql thread structure
  @param      var  the data for the variable
  @param[out] buf  the string to put the value of the variable into

  @return          status
  @retval     0    success
*/

static int
show_ssl_get_server_not_after(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_CHAR;
  if (ssl_acceptor_fd)
  {
    X509 *cert= SSL_get_certificate(ssl_acceptor);
    ASN1_TIME *not_after= X509_get_notAfter(cert);

    if (not_after == NULL)
    {
      var->value= empty_c_string;
      return 0;
    }

    var->value= my_asn1_time_to_string(not_after, buff,
                                       SHOW_VAR_FUNC_BUFF_SIZE);
    if (var->value == NULL)
    {
      var->value= empty_c_string;
      return 1;
    }
  }
  else
    var->value= empty_c_string;
  return 0;
}

#endif /* HAVE_OPENSSL && !EMBEDDED_LIBRARY */

#ifdef HAVE_POOL_OF_THREADS
static int
show_threadpool_idle_threads(THD *thd, SHOW_VAR *var, char *buff)
{
  var->type= SHOW_INT;
  var->value= buff;
  *(int *)buff= tp_get_idle_thread_count();
  return 0;
}
#endif

static int show_slave_open_temp_tables(THD *thd, SHOW_VAR *var, char *buf)
{
  var->type= SHOW_INT;
  var->value= buf;
  *((int *) buf)= slave_open_temp_tables.atomic_get();
  return 0;
}
bool validate_libcoredumper_path(char *libcoredumper_path)
{
  /* validate path */
  if (!is_valid_log_name(libcoredumper_path, strlen(libcoredumper_path)))
  {  //filename contain .cnf or .ini on it
    sql_print_error("Variable --coredumper cannot be set to value %s",
                    libcoredumper_path);
    return false;
  }
  char   libcoredumper_dir[FN_REFLEN];
  size_t libcoredumper_dir_length;
  size_t opt_libcoredumper_path_length= strlen(libcoredumper_path);
  (void)dirname_part(libcoredumper_dir, libcoredumper_path,
                     &libcoredumper_dir_length);

  if (!libcoredumper_dir_length)
  {
    sql_print_error("Error processing --coredumper path: %s",
                    libcoredumper_path);
    return false;
  }
  size_t libcoredumper_file_length=
      opt_libcoredumper_path_length - libcoredumper_dir_length;
  if (libcoredumper_file_length == 0)  //path is a directory
  {
    libcoredumper_file_length= 19;  //file is set to core.yyyymmddhhmmss
  }
  else
  {
    libcoredumper_file_length+= 15;  //file gets .yyyymmddhhmmss appended
  }
  if (opt_libcoredumper_path_length > FN_REFLEN)
  {  // path is too long
    sql_print_error("Variable --coredumper set to a too long path");
    return false;
  }
  if (libcoredumper_file_length > FN_LEN)
  {  // filename is too long
    sql_print_error("Variable --coredumper set to a too long filename");
    return false;
  }
  if (my_access(libcoredumper_dir, F_OK))
  {
    sql_print_error("Directory specified at --coredumper: %s does not exist",
                    libcoredumper_dir);
    return false;
  }
  if (my_access(libcoredumper_dir, (F_OK | W_OK)))
  {
    sql_print_error("Directory specified at --coredumper: %s is not writable",
                    libcoredumper_dir);
    return false;
  }
  if (libcoredumper_dir_length == strlen(libcoredumper_path))
  {  //only dirname was specified, append core to libcoredumper_path
    strcat(libcoredumper_path, "core");
  }
  return true;
}
/*
  Variables shown by SHOW STATUS in alphabetical order
*/

SHOW_VAR status_vars[]= {
  {"Aborted_clients",          (char*) &aborted_threads,                              SHOW_LONG,               SHOW_SCOPE_GLOBAL},
#ifndef EMBEDDED_LIBRARY
  {"Aborted_connects",         (char*) &show_aborted_connects,                        SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
#endif
#ifdef HAVE_REPLICATION
#ifndef NDEBUG
  {"Ongoing_anonymous_gtid_violating_transaction_count",(char*) &show_ongoing_anonymous_gtid_violating_transaction_count, SHOW_FUNC, SHOW_SCOPE_GLOBAL},
#endif//!NDEBUG
  {"Ongoing_anonymous_transaction_count",(char*) &show_ongoing_anonymous_transaction_count, SHOW_FUNC, SHOW_SCOPE_GLOBAL},
#ifndef NDEBUG
  {"Ongoing_automatic_gtid_violating_transaction_count",(char*) &show_ongoing_automatic_gtid_violating_transaction_count, SHOW_FUNC, SHOW_SCOPE_GLOBAL},
#endif//!NDEBUG
#endif//HAVE_REPLICATION
  {"Binlog_cache_disk_use",    (char*) &binlog_cache_disk_use,                        SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Binlog_cache_use",         (char*) &binlog_cache_use,                             SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Binlog_stmt_cache_disk_use",(char*) &binlog_stmt_cache_disk_use,                  SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Binlog_stmt_cache_use",    (char*) &binlog_stmt_cache_use,                        SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Bytes_received",           (char*) offsetof(STATUS_VAR, bytes_received),          SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Bytes_sent",               (char*) offsetof(STATUS_VAR, bytes_sent),              SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Com",                      (char*) com_status_vars,                               SHOW_ARRAY,              SHOW_SCOPE_ALL},
  {"Com_stmt_reprepare",       (char*) offsetof(STATUS_VAR, com_stmt_reprepare),      SHOW_LONG_STATUS,        SHOW_SCOPE_ALL},
  {"Compression",              (char*) &show_net_compression,                         SHOW_FUNC,               SHOW_SCOPE_SESSION},
  {"Connections",              (char*) &show_thread_id_count,                         SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
#ifndef EMBEDDED_LIBRARY
  {"Connection_errors_accept",   (char*) &show_connection_errors_accept,              SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
  {"Connection_errors_internal", (char*) &connection_errors_internal,                 SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Connection_errors_max_connections",   (char*) &show_connection_errors_max_connection, SHOW_FUNC,           SHOW_SCOPE_GLOBAL},
  {"Connection_errors_peer_address", (char*) &connection_errors_peer_addr,            SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Connection_errors_select",   (char*) &show_connection_errors_select,              SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
  {"Connection_errors_tcpwrap",  (char*) &show_connection_errors_tcpwrap,             SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
#endif
  {"Created_tmp_disk_tables",  (char*) offsetof(STATUS_VAR, created_tmp_disk_tables), SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Created_tmp_files",        (char*) &my_tmp_file_created,                          SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Created_tmp_tables",       (char*) offsetof(STATUS_VAR, created_tmp_tables),      SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Delayed_errors",           (char*) &delayed_insert_errors,                        SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Delayed_insert_threads",   (char*) &delayed_insert_threads,                       SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Delayed_writes",           (char*) &delayed_insert_writes,                        SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Flush_commands",           (char*) &refresh_version,                              SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Handler_commit",           (char*) offsetof(STATUS_VAR, ha_commit_count),         SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_delete",           (char*) offsetof(STATUS_VAR, ha_delete_count),         SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_discover",         (char*) offsetof(STATUS_VAR, ha_discover_count),       SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_external_lock",    (char*) offsetof(STATUS_VAR, ha_external_lock_count),  SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_mrr_init",         (char*) offsetof(STATUS_VAR, ha_multi_range_read_init_count), SHOW_LONGLONG_STATUS, SHOW_SCOPE_ALL},
  {"Handler_prepare",          (char*) offsetof(STATUS_VAR, ha_prepare_count),        SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_read_first",       (char*) offsetof(STATUS_VAR, ha_read_first_count),     SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_read_key",         (char*) offsetof(STATUS_VAR, ha_read_key_count),       SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_read_last",        (char*) offsetof(STATUS_VAR, ha_read_last_count),      SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_read_next",        (char*) offsetof(STATUS_VAR, ha_read_next_count),      SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_read_prev",        (char*) offsetof(STATUS_VAR, ha_read_prev_count),      SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_read_rnd",         (char*) offsetof(STATUS_VAR, ha_read_rnd_count),       SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_read_rnd_next",    (char*) offsetof(STATUS_VAR, ha_read_rnd_next_count),  SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_rollback",         (char*) offsetof(STATUS_VAR, ha_rollback_count),       SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_savepoint",        (char*) offsetof(STATUS_VAR, ha_savepoint_count),      SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_savepoint_rollback",(char*) offsetof(STATUS_VAR, ha_savepoint_rollback_count), SHOW_LONGLONG_STATUS, SHOW_SCOPE_ALL},
  {"Handler_update",           (char*) offsetof(STATUS_VAR, ha_update_count),         SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Handler_write",            (char*) offsetof(STATUS_VAR, ha_write_count),          SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Key_blocks_not_flushed",   (char*) offsetof(KEY_CACHE, global_blocks_changed),    SHOW_KEY_CACHE_LONG,     SHOW_SCOPE_GLOBAL},
  {"Key_blocks_unused",        (char*) offsetof(KEY_CACHE, blocks_unused),            SHOW_KEY_CACHE_LONG,     SHOW_SCOPE_GLOBAL},
  {"Key_blocks_used",          (char*) offsetof(KEY_CACHE, blocks_used),              SHOW_KEY_CACHE_LONG,     SHOW_SCOPE_GLOBAL},
  {"Key_read_requests",        (char*) offsetof(KEY_CACHE, global_cache_r_requests),  SHOW_KEY_CACHE_LONGLONG, SHOW_SCOPE_GLOBAL},
  {"Key_reads",                (char*) offsetof(KEY_CACHE, global_cache_read),        SHOW_KEY_CACHE_LONGLONG, SHOW_SCOPE_GLOBAL},
  {"Key_write_requests",       (char*) offsetof(KEY_CACHE, global_cache_w_requests),  SHOW_KEY_CACHE_LONGLONG, SHOW_SCOPE_GLOBAL},
  {"Key_writes",               (char*) offsetof(KEY_CACHE, global_cache_write),       SHOW_KEY_CACHE_LONGLONG, SHOW_SCOPE_GLOBAL},
  {"Last_query_cost",          (char*) offsetof(STATUS_VAR, last_query_cost),         SHOW_DOUBLE_STATUS,      SHOW_SCOPE_SESSION},
  {"Last_query_partial_plans", (char*) offsetof(STATUS_VAR, last_query_partial_plans),SHOW_LONGLONG_STATUS,    SHOW_SCOPE_SESSION},
#ifndef EMBEDDED_LIBRARY
  {"Locked_connects",          (char*) &locked_account_connection_count,              SHOW_LONG,               SHOW_SCOPE_GLOBAL},
#endif
  {"Max_execution_time_exceeded",   (char*) offsetof(STATUS_VAR, max_execution_time_exceeded),   SHOW_LONGLONG_STATUS, SHOW_SCOPE_ALL},
  {"Max_execution_time_set",        (char*) offsetof(STATUS_VAR, max_execution_time_set),        SHOW_LONGLONG_STATUS, SHOW_SCOPE_ALL},
  {"Max_execution_time_set_failed", (char*) offsetof(STATUS_VAR, max_execution_time_set_failed), SHOW_LONGLONG_STATUS, SHOW_SCOPE_ALL},
  {"Max_used_connections",     (char*) &Connection_handler_manager::max_used_connections,        SHOW_LONG,        SHOW_SCOPE_GLOBAL},
  {"Max_used_connections_time",(char*) &show_max_used_connections_time,               SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
  {"Not_flushed_delayed_rows", (char*) &delayed_rows_in_use,                          SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Open_files",               (char*) &my_file_opened,                               SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Open_streams",             (char*) &my_stream_opened,                             SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Open_table_definitions",   (char*) &show_table_definitions,                       SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
  {"Open_tables",              (char*) &show_open_tables,                             SHOW_FUNC,               SHOW_SCOPE_ALL},
  {"Opened_files",             (char*) &my_file_total_opened,                         SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Opened_tables",            (char*) offsetof(STATUS_VAR, opened_tables),           SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Opened_table_definitions", (char*) offsetof(STATUS_VAR, opened_shares),           SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Prepared_stmt_count",      (char*) &show_prepared_stmt_count,                     SHOW_FUNC,               SHOW_SCOPE_GLOBAL},
  {"Qcache_free_blocks",       (char*) &query_cache.free_memory_blocks,               SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Qcache_free_memory",       (char*) &query_cache.free_memory,                      SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Qcache_hits",              (char*) &query_cache.hits,                             SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Qcache_inserts",           (char*) &query_cache.inserts,                          SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Qcache_lowmem_prunes",     (char*) &query_cache.lowmem_prunes,                    SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Qcache_not_cached",        (char*) &query_cache.refused,                          SHOW_LONG,               SHOW_SCOPE_GLOBAL},
  {"Qcache_queries_in_cache",  (char*) &query_cache.queries_in_cache,                 SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Qcache_total_blocks",      (char*) &query_cache.total_blocks,                     SHOW_LONG_NOFLUSH,       SHOW_SCOPE_GLOBAL},
  {"Queries",                  (char*) &show_queries,                                 SHOW_FUNC,               SHOW_SCOPE_ALL},
  {"Questions",                (char*) offsetof(STATUS_VAR, questions),               SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Select_full_join",         (char*) offsetof(STATUS_VAR, select_full_join_count),  SHOW_LONGLONG_STATUS,    SHOW_SCOPE_ALL},
  {"Select_full_range_join",   (char*) offsetof(STATUS_VAR, select_full_range_join_count), SHOW_LONGLONG_STATUS, SHOW_SCOPE_ALL},
  {"Select_range",             (char*) offsetof(STATUS_VAR, select_range_count),       SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Select_range_check",       (char*) offsetof(STATUS_VAR, select_range_check_count), SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Select_scan",	       (char*) offsetof(STATUS_VAR, select_scan_count),              SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Slave_open_temp_tables",   (char*) &show_slave_open_temp_tables,                   SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
#ifdef HAVE_REPLICATION
  {"Slave_retried_transactions",(char*) &show_slave_retried_trans,                     SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Slave_heartbeat_period",   (char*) &show_heartbeat_period,                         SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Slave_received_heartbeats",(char*) &show_slave_received_heartbeats,                SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Slave_last_heartbeat",     (char*) &show_slave_last_heartbeat,                     SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
#ifndef NDEBUG
  {"Slave_rows_last_search_algorithm_used",(char*) &show_slave_rows_last_search_algorithm_used, SHOW_FUNC,     SHOW_SCOPE_GLOBAL},
#endif
  {"Slave_running",            (char*) &show_slave_running,                            SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
#endif
#ifndef EMBEDDED_LIBRARY
  {"Slow_launch_threads",      (char*) &Per_thread_connection_handler::slow_launch_threads, SHOW_LONG,         SHOW_SCOPE_ALL},
#endif
  {"Slow_queries",             (char*) offsetof(STATUS_VAR, long_query_count),         SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Sort_merge_passes",        (char*) offsetof(STATUS_VAR, filesort_merge_passes),    SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Sort_range",               (char*) offsetof(STATUS_VAR, filesort_range_count),     SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Sort_rows",                (char*) offsetof(STATUS_VAR, filesort_rows),            SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Sort_scan",                (char*) offsetof(STATUS_VAR, filesort_scan_count),      SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
#ifdef HAVE_OPENSSL
#ifndef EMBEDDED_LIBRARY
  {"Ssl_accept_renegotiates",  (char*) &show_ssl_ctx_sess_accept_renegotiate,          SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_accepts",              (char*) &show_ssl_ctx_sess_accept,                      SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_callback_cache_hits",  (char*) &show_ssl_ctx_sess_cb_hits,                     SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_cipher",               (char*) &show_ssl_get_cipher,                           SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_cipher_list",          (char*) &show_ssl_get_cipher_list,                      SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_client_connects",      (char*) &show_ssl_ctx_sess_connect,                     SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_connect_renegotiates", (char*) &show_ssl_ctx_sess_connect_renegotiate,         SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_ctx_verify_depth",     (char*) &show_ssl_ctx_get_verify_depth,                 SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_ctx_verify_mode",      (char*) &show_ssl_ctx_get_verify_mode,                  SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_default_timeout",      (char*) &show_ssl_get_default_timeout,                  SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_finished_accepts",     (char*) &show_ssl_ctx_sess_accept_good,                 SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_finished_connects",    (char*) &show_ssl_ctx_sess_connect_good,                SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_session_cache_hits",   (char*) &show_ssl_ctx_sess_hits,                        SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_session_cache_misses", (char*) &show_ssl_ctx_sess_misses,                      SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_session_cache_mode",   (char*) &show_ssl_ctx_get_session_cache_mode,           SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_session_cache_overflows", (char*) &show_ssl_ctx_sess_cache_full,               SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_session_cache_size",   (char*) &show_ssl_ctx_sess_get_cache_size,              SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_session_cache_timeouts", (char*) &show_ssl_ctx_sess_timeouts,                  SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_sessions_reused",      (char*) &show_ssl_session_reused,                       SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_used_session_cache_entries",(char*) &show_ssl_ctx_sess_number,                 SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Ssl_verify_depth",         (char*) &show_ssl_get_verify_depth,                     SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_verify_mode",          (char*) &show_ssl_get_verify_mode,                      SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_version",              (char*) &show_ssl_get_version,                          SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_server_not_before",    (char*) &show_ssl_get_server_not_before,                SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Ssl_server_not_after",     (char*) &show_ssl_get_server_not_after,                 SHOW_FUNC,              SHOW_SCOPE_ALL},
  {"Rsa_public_key",           (char*) &show_rsa_public_key,                           SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
#endif
#endif /* HAVE_OPENSSL */
  {"Table_locks_immediate",    (char*) &locks_immediate,                               SHOW_LONG,              SHOW_SCOPE_GLOBAL},
  {"Table_locks_waited",       (char*) &locks_waited,                                  SHOW_LONG,              SHOW_SCOPE_GLOBAL},
  {"Table_open_cache_hits",    (char*) offsetof(STATUS_VAR, table_open_cache_hits),    SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Table_open_cache_misses",  (char*) offsetof(STATUS_VAR, table_open_cache_misses),  SHOW_LONGLONG_STATUS,   SHOW_SCOPE_ALL},
  {"Table_open_cache_overflows",(char*) offsetof(STATUS_VAR, table_open_cache_overflows), SHOW_LONGLONG_STATUS,SHOW_SCOPE_ALL},
  {"Tc_log_max_pages_used",    (char*) &tc_log_max_pages_used,                         SHOW_LONG,              SHOW_SCOPE_GLOBAL},
  {"Tc_log_page_size",         (char*) &tc_log_page_size,                              SHOW_LONG_NOFLUSH,      SHOW_SCOPE_GLOBAL},
  {"Tc_log_page_waits",        (char*) &tc_log_page_waits,                             SHOW_LONG,              SHOW_SCOPE_GLOBAL},
#ifdef HAVE_POOL_OF_THREADS
  {"Threadpool_idle_threads",  (char *) &show_threadpool_idle_threads,                 SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Threadpool_threads",       (char *) &tp_stats.num_worker_threads,                  SHOW_INT,               SHOW_SCOPE_GLOBAL},
#endif
#ifndef EMBEDDED_LIBRARY
  {"Threads_cached",           (char*) &Per_thread_connection_handler::blocked_pthread_count, SHOW_LONG_NOFLUSH, SHOW_SCOPE_GLOBAL},
#endif
  {"Threads_connected",        (char*) &Connection_handler_manager::connection_count,  SHOW_INT,               SHOW_SCOPE_GLOBAL},
  {"Threads_created",          (char*) &show_num_thread_created,                       SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Threads_running",          (char*) &show_num_thread_running,                       SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
  {"Uptime",                   (char*) &show_starttime,                                SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
#ifdef ENABLED_PROFILING
  {"Uptime_since_flush_status",(char*) &show_flushstatustime,                          SHOW_FUNC,              SHOW_SCOPE_GLOBAL},
#endif
  {NullS, NullS, SHOW_LONG, SHOW_SCOPE_ALL}
};

void add_terminator(vector<my_option> *options)
{
  my_option empty_element=
    {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0};
  options->push_back(empty_element);
}

#ifndef EMBEDDED_LIBRARY
static void print_version(void)
{
  set_server_version();

  printf("%s  Ver %s for %s on %s (%s)\n",my_progname,
   server_version,SYSTEM_TYPE,MACHINE_TYPE, MYSQL_COMPILATION_COMMENT);
}

/** Compares two options' names, treats - and _ the same */
static bool operator<(const my_option &a, const my_option &b)
{
  const char *sa= a.name;
  const char *sb= b.name;
  for (; *sa || *sb; sa++, sb++)
  {
    if (*sa < *sb)
    {
      if (*sa == '-' && *sb == '_')
        continue;
      else
        return true;
    }
    if (*sa > *sb)
    {
      if (*sa == '_' && *sb == '-')
        continue;
      else
        return false;
    }
  }
  assert(a.name == b.name);
  return false;
}

static void print_help()
{
  MEM_ROOT mem_root;
  init_alloc_root(key_memory_help, &mem_root, 4096, 4096);

  all_options.pop_back();
  sys_var_add_options(&all_options, sys_var::PARSE_EARLY);
  for (my_option *opt= my_long_early_options;
       opt->name != NULL;
       opt++)
  {
    all_options.push_back(*opt);
  }
  add_plugin_options(&all_options, &mem_root);
  std::sort(all_options.begin(), all_options.end(), std::less<my_option>());
  add_terminator(&all_options);

  my_print_help(&all_options[0]);
  my_print_variables(&all_options[0]);

  free_root(&mem_root, MYF(0));
  vector<my_option>().swap(all_options);  // Deletes the vector contents.
}

static void usage(void)
{
  DBUG_ENTER("usage");
  if (!(default_charset_info= get_charset_by_csname(default_character_set_name,
                     MY_CS_PRIMARY,
               MYF(MY_WME))))
    exit(MYSQLD_ABORT_EXIT);
  if (!default_collation_name)
    default_collation_name= (char*) default_charset_info->name;
  print_version();
  puts(ORACLE_WELCOME_COPYRIGHT_NOTICE("2000"));
  puts("Starts the MySQL database server.\n");
  printf("Usage: %s [OPTIONS]\n", my_progname);
  if (!opt_verbose)
    puts("\nFor more help options (several pages), use mysqld --verbose --help.");
  else
  {
#ifdef _WIN32
  puts("NT and Win32 specific options:\n\
  --install                     Install the default service (NT).\n\
  --install-manual              Install the default service started manually (NT).\n\
  --install service_name        Install an optional service (NT).\n\
  --install-manual service_name Install an optional service started manually (NT).\n\
  --remove                      Remove the default service from the service list (NT).\n\
  --remove service_name         Remove the service_name from the service list (NT).\n\
  --enable-named-pipe           Only to be used for the default server (NT).\n\
  --standalone                  Dummy option to start as a standalone server (NT).\
");
  puts("");
#endif
  print_defaults(MYSQL_CONFIG_NAME,load_default_groups);
  puts("");
  set_ports();

  /* Print out all the options including plugin supplied options */
  print_help();

  if (! plugins_are_initialized)
  {
    puts("\n\
Plugins have parameters that are not reflected in this list\n\
because execution stopped before plugins were initialized.");
  }

  puts("\n\
To see what values a running MySQL server is using, type\n\
'mysqladmin variables' instead of 'mysqld --verbose --help'.");
  }
  DBUG_VOID_RETURN;
}
#endif /*!EMBEDDED_LIBRARY*/

/**
  Initialize MySQL global variables to default values.

  @note
    The reason to set a lot of global variables to zero is to allow one to
    restart the embedded server with a clean environment
    It's also needed on some exotic platforms where global variables are
    not set to 0 when a program starts.

    We don't need to set variables refered to in my_long_options
    as these are initialized by my_getopt.
*/

static int mysql_init_variables(void)
{
  /* Things reset to zero */
  opt_skip_slave_start= opt_reckless_slave = 0;
  mysql_home[0]= pidfile_name[0]= 0;
  myisam_test_invalid_symlink= test_if_data_home_dir;
  opt_general_log= opt_slow_log= false;
  opt_bin_log= 0;
  opt_disable_networking= opt_skip_show_db=0;
  opt_skip_name_resolve= 0;
  opt_ignore_builtin_innodb= 0;
  opt_general_logname= opt_update_logname= opt_binlog_index_name= opt_slow_logname= NULL;
  opt_tc_log_file= (char *)"tc.log";      // no hostname in tc_log file name !
  opt_secure_auth= 0;
  opt_myisam_log= 0;
  mqh_used= 0;
  kill_in_progress= 0;
  cleanup_done= 0;
  server_id_supplied= false;
  select_errors= dropping_tables= ha_open_options=0;
  slave_open_temp_tables.atomic_set(0);
  opt_endinfo= using_udf_functions= 0;
  opt_using_transactions= 0;
  abort_loop= false;
  server_operational_state= SERVER_BOOTING;
  aborted_threads= 0;
  delayed_insert_threads= delayed_insert_writes= delayed_rows_in_use= 0;
  delayed_insert_errors= 0;
  specialflag= 0;
  binlog_cache_use=  binlog_cache_disk_use= 0;
  mysqld_user= mysqld_chroot= opt_init_file= opt_bin_logname = 0;
  prepared_stmt_count= 0;
  mysqld_unix_port= opt_mysql_tmpdir= my_bind_addr_str= NullS;
  memset(&mysql_tmpdir_list, 0, sizeof(mysql_tmpdir_list));
  memset(&global_status_var, 0, sizeof(global_status_var));
  opt_large_pages= 0;
  opt_super_large_pages= 0;
#if defined(ENABLED_DEBUG_SYNC)
  opt_debug_sync_timeout= 0;
#endif /* defined(ENABLED_DEBUG_SYNC) */
  key_map_full.set_all();
  server_uuid[0]= 0;

  /* Character sets */
  system_charset_info= &my_charset_utf8_general_ci;
  files_charset_info= &my_charset_utf8_general_ci;
  national_charset_info= &my_charset_utf8_general_ci;
  table_alias_charset= &my_charset_bin;
  character_set_filesystem= &my_charset_bin;

  opt_specialflag= 0;
  mysql_home_ptr= mysql_home;
  pidfile_name_ptr= pidfile_name;
  lc_messages_dir_ptr= lc_messages_dir;
  protocol_version= PROTOCOL_VERSION;
  what_to_log= ~ (1L << (uint) COM_TIME);
  refresh_version= 1L;  /* Increments on each reload */
  global_query_id= 1L;
  my_stpcpy(server_version, MYSQL_SERVER_VERSION);
  key_caches.empty();
  if (!(dflt_key_cache= get_or_create_key_cache(default_key_cache_base.str,
                                                default_key_cache_base.length)))
  {
    sql_print_error("Cannot allocate the keycache");
    return 1;
  }
  /* set key_cache_hash.default_value = dflt_key_cache */
  multi_keycache_init();

  /* Set directory paths */
  mysql_real_data_home_len=
    strmake(mysql_real_data_home, get_relative_path(MYSQL_DATADIR),
            sizeof(mysql_real_data_home)-1) - mysql_real_data_home;
  /* Replication parameters */
  master_info_file= (char*) "master.info",
    relay_log_info_file= (char*) "relay-log.info";
  report_user= report_password = report_host= 0;  /* TO BE DELETED */
  opt_relay_logname= opt_relaylog_index_name= 0;
  log_bin_basename= NULL;
  log_bin_index= NULL;

  /* Handler variables */
  total_ha= 0;
  total_ha_2pc= 0;
  /* Variables in libraries */
  charsets_dir= 0;
  default_character_set_name= (char*) MYSQL_DEFAULT_CHARSET_NAME;
  default_collation_name= compiled_default_collation_name;
  character_set_filesystem_name= (char*) "binary";
  lc_messages= (char*) "en_US";
  lc_time_names_name= (char*) "en_US";
  opt_replication_optimize_for_static_plugin_config= 0;
  opt_replication_sender_observe_commit_only= 0;

  /* Variables that depends on compile options */
#ifndef NDEBUG
  default_dbug_option=IF_WIN("d:t:i:O,\\mysqld.trace",
           "d:t:i:o,/tmp/mysqld.trace");
#endif
#ifdef ENABLED_PROFILING
    have_profiling = SHOW_OPTION_YES;
#else
    have_profiling = SHOW_OPTION_NO;
#endif

#ifdef HAVE_OPENSSL
  have_ssl=SHOW_OPTION_YES;
#else
  have_ssl=SHOW_OPTION_NO;
#endif

  have_symlink= SHOW_OPTION_YES;

#ifdef HAVE_DLOPEN
  have_dlopen=SHOW_OPTION_YES;
#else
  have_dlopen=SHOW_OPTION_NO;
#endif

  have_query_cache=SHOW_OPTION_YES;

  have_geometry=SHOW_OPTION_YES;

  have_rtree_keys=SHOW_OPTION_YES;

#ifdef HAVE_CRYPT
  have_crypt=SHOW_OPTION_YES;
#else
  have_crypt=SHOW_OPTION_NO;
#endif
#ifdef HAVE_COMPRESS
  have_compress= SHOW_OPTION_YES;
#else
  have_compress= SHOW_OPTION_NO;
#endif
#ifdef HAVE_OPENSSL
  des_key_file = 0;
#ifndef EMBEDDED_LIBRARY
  ssl_acceptor_fd= 0;
#endif /* ! EMBEDDED_LIBRARY */
#endif /* HAVE_OPENSSL */
#if defined (_WIN32) && !defined (EMBEDDED_LIBRARY)
  shared_memory_base_name= default_shared_memory_base_name;
#endif

  have_backup_locks= SHOW_OPTION_YES;
  have_backup_safe_binlog_info= SHOW_OPTION_YES;
  have_snapshot_cloning= SHOW_OPTION_YES;

#if defined(_WIN32)
  /* Allow Win32 users to move MySQL anywhere */
  {
    char prg_dev[LIBLEN];
    char executing_path_name[LIBLEN];
    if (!test_if_hard_path(my_progname))
    {
      // we don't want to use GetModuleFileName inside of my_path since
      // my_path is a generic path dereferencing function and here we care
      // only about the executing binary.
      GetModuleFileName(NULL, executing_path_name, sizeof(executing_path_name));
      my_path(prg_dev, executing_path_name, NULL);
    }
    else
      my_path(prg_dev, my_progname, "mysql/bin");
    strcat(prg_dev,"/../");     // Remove 'bin' to get base dir
    cleanup_dirname(mysql_home,prg_dev);
  }
#else
  const char *tmpenv;
  if (!(tmpenv = getenv("MY_BASEDIR_VERSION")))
    tmpenv = DEFAULT_MYSQL_HOME;
  (void) strmake(mysql_home, tmpenv, sizeof(mysql_home)-1);
#endif
  return 0;
}

my_bool
mysqld_get_one_option(int optid,
                      const struct my_option *opt MY_ATTRIBUTE((unused)),
                      char *argument)
{
  switch(optid) {
  case '#':
#ifndef NDEBUG
    DBUG_SET_INITIAL(argument ? argument : default_dbug_option);
#endif
    opt_endinfo=1;        /* unireg: memory allocation */
    break;
  case 'a':
    global_system_variables.sql_mode= MODE_ANSI;
    global_system_variables.tx_isolation=
           global_system_variables.transaction_isolation= ISO_SERIALIZABLE;
    break;
  case 'b':
    strmake(mysql_home,argument,sizeof(mysql_home)-1);
    mysql_home_ptr= mysql_home;
    break;
  case 'C':
    if (default_collation_name == compiled_default_collation_name)
      default_collation_name= 0;
    break;
  case 'h':
    strmake(mysql_real_data_home,argument, sizeof(mysql_real_data_home)-1);
    /* Correct pointer set by my_getopt (for embedded library) */
    mysql_real_data_home_ptr= mysql_real_data_home;
    break;
  case 'u':
    if (!mysqld_user || !strcmp(mysqld_user, argument))
      mysqld_user= argument;
    else
      sql_print_warning("Ignoring user change to '%s' because the user was set to '%s' earlier on the command line\n", argument, mysqld_user);
    break;
  case 'L':
    push_deprecated_warn(NULL, "--language/-l", "'--lc-messages-dir'");
    // fallthrough
  case OPT_LC_MESSAGES_DIRECTORY:
    strmake(lc_messages_dir, argument, sizeof(lc_messages_dir)-1);
    lc_messages_dir_ptr= lc_messages_dir;
    break;
  case OPT_BINLOG_FORMAT:
    binlog_format_used= true;
    break;
  case OPT_BINLOG_MAX_FLUSH_QUEUE_TIME:
    push_deprecated_warn_no_replacement(NULL, "--binlog_max_flush_queue_time");
    break;
#if defined(HAVE_OPENSSL) && !defined(EMBEDDED_LIBRARY)
  case OPT_SSL_KEY:
  case OPT_SSL_CERT:
  case OPT_SSL_CA:
  case OPT_SSL_CAPATH:
  case OPT_SSL_CIPHER:
  case OPT_SSL_CRL:
  case OPT_SSL_CRLPATH:
  case OPT_TLS_VERSION:
    /*
      Enable use of SSL if we are using any ssl option.
      One can disable SSL later by using --skip-ssl or --ssl=0.
    */
    opt_use_ssl= true;
    break;
#endif /* HAVE_OPENSSL */
#ifndef EMBEDDED_LIBRARY
  case 'V':
    print_version();
    exit(MYSQLD_SUCCESS_EXIT);
#endif /*EMBEDDED_LIBRARY*/
  case 'W':
    push_deprecated_warn(NULL, "--log_warnings/-W", "'--log_error_verbosity'");
    if (!argument)
      log_error_verbosity++;
    else if (argument == disabled_my_option)
     log_error_verbosity= 1L;
    else
      log_error_verbosity= 1 + atoi(argument);
    log_error_verbosity= min(3UL, log_error_verbosity);
    break;
  case 'T':
    test_flags= argument ? (uint) atoi(argument) : 0;
    opt_endinfo=1;
    break;
  case (int) OPT_ISAM_LOG:
    opt_myisam_log=1;
    break;
  case (int) OPT_BIN_LOG:
    opt_bin_log= MY_TEST(argument != disabled_my_option);
    break;
#ifdef HAVE_REPLICATION
  case (int)OPT_REPLICATE_IGNORE_DB:
  {
    rpl_filter->add_ignore_db(argument);
    break;
  }
  case (int)OPT_REPLICATE_DO_DB:
  {
    rpl_filter->add_do_db(argument);
    break;
  }
  case (int)OPT_REPLICATE_REWRITE_DB:
  {
    char* key = argument,*p, *val;

    if (!(p= strstr(argument, "->")))
    {
      sql_print_error("Bad syntax in replicate-rewrite-db - missing '->'!\n");
      return 1;
    }
    val= p + 2;
    while(p > argument && my_isspace(mysqld_charset, p[-1]))
      p--;
    *p= 0;
    if (!*key)
    {
      sql_print_error("Bad syntax in replicate-rewrite-db - empty FROM db!\n");
      return 1;
    }
    while (*val && my_isspace(mysqld_charset, *val))
      val++;
    if (!*val)
    {
      sql_print_error("Bad syntax in replicate-rewrite-db - empty TO db!\n");
      return 1;
    }

    rpl_filter->add_db_rewrite(key, val);
    break;
  }

  case (int)OPT_BINLOG_IGNORE_DB:
  {
    binlog_filter->add_ignore_db(argument);
    break;
  }
  case (int)OPT_BINLOG_DO_DB:
  {
    binlog_filter->add_do_db(argument);
    break;
  }
  case (int)OPT_REPLICATE_DO_TABLE:
  {
    if (rpl_filter->add_do_table_array(argument))
    {
      sql_print_error("Could not add do table rule '%s'!\n", argument);
      return 1;
    }
    break;
  }
  case (int)OPT_REPLICATE_WILD_DO_TABLE:
  {
    if (rpl_filter->add_wild_do_table(argument))
    {
      sql_print_error("Could not add do table rule '%s'!\n", argument);
      return 1;
    }
    break;
  }
  case (int)OPT_REPLICATE_WILD_IGNORE_TABLE:
  {
    if (rpl_filter->add_wild_ignore_table(argument))
    {
      sql_print_error("Could not add ignore table rule '%s'!\n", argument);
      return 1;
    }
    break;
  }
  case (int)OPT_REPLICATE_IGNORE_TABLE:
  {
    if (rpl_filter->add_ignore_table_array(argument))
    {
      sql_print_error("Could not add ignore table rule '%s'!\n", argument);
      return 1;
    }
    break;
  }
#endif /* HAVE_REPLICATION */
  case (int) OPT_MASTER_RETRY_COUNT:
    push_deprecated_warn(NULL, "--master-retry-count", "'CHANGE MASTER TO master_retry_count = <num>'");
    break;
  case (int) OPT_SKIP_NEW:
    opt_specialflag|= SPECIAL_NO_NEW_FUNC;
    delay_key_write_options= DELAY_KEY_WRITE_NONE;
    myisam_concurrent_insert=0;
    myisam_recover_options= HA_RECOVER_OFF;
    sp_automatic_privileges=0;
    my_enable_symlinks= 0;
    ha_open_options&= ~(HA_OPEN_ABORT_IF_CRASHED | HA_OPEN_DELAY_KEY_WRITE);
    query_cache_size=0;
    break;
  case (int) OPT_SKIP_HOST_CACHE:
    opt_specialflag|= SPECIAL_NO_HOST_CACHE;
    break;
  case (int) OPT_SKIP_RESOLVE:
    opt_skip_name_resolve= 1;
    opt_specialflag|=SPECIAL_NO_RESOLVE;
    break;
  case (int) OPT_WANT_CORE:
    test_flags |= TEST_CORE_ON_SIGNAL;
    opt_corefile= MY_TEST(argument != disabled_my_option);
    break;
  case (int) OPT_COREDUMPER:
    test_flags |= TEST_CORE_ON_SIGNAL;
    opt_libcoredumper= MY_TEST(argument != disabled_my_option);
    break;
  case (int) OPT_SKIP_STACK_TRACE:
    test_flags|=TEST_NO_STACKTRACE;
    break;
  case OPT_BOOTSTRAP:
    opt_bootstrap= 1;
    break;
  case OPT_SERVER_ID:
    /*
     Consider that one received a Server Id when 2 conditions are present:
     1) The argument is on the list
     2) There is a value present
    */
    server_id_supplied= (*argument != 0);

    break;
  case OPT_LOWER_CASE_TABLE_NAMES:
    lower_case_table_names_used= 1;
    break;
#if defined(ENABLED_DEBUG_SYNC)
  case OPT_DEBUG_SYNC_TIMEOUT:
    /*
      Debug Sync Facility. See debug_sync.cc.
      Default timeout for WAIT_FOR action.
      Default value is zero (facility disabled).
      If option is given without an argument, supply a non-zero value.
    */
    if (!argument)
    {
      /* purecov: begin tested */
      opt_debug_sync_timeout= DEBUG_SYNC_DEFAULT_WAIT_TIMEOUT;
      /* purecov: end */
    }
    break;
#endif /* defined(ENABLED_DEBUG_SYNC) */
  case OPT_LOG_ERROR:
    /*
      "No --log-error" == "write errors to stderr",
      "--log-error without argument" == "write errors to a file".
    */
    if (argument == NULL) /* no argument */
      log_error_dest= "";
    break;

  case OPT_IGNORE_DB_DIRECTORY:
    if (*argument == 0)
      ignore_db_dirs_reset();
    else
    {
      if (push_ignored_db_dir(argument))
      {
        sql_print_error("Can't start server: "
                        "cannot process --ignore-db-dir=%.*s",
                        FN_REFLEN, argument);
        return 1;
      }
    }
    break;

  case OPT_EARLY_PLUGIN_LOAD:
    free_list(opt_early_plugin_load_list_ptr);
    opt_early_plugin_load_list_ptr->push_back(new i_string(argument));
    break;
  case OPT_PLUGIN_LOAD:
    free_list(opt_plugin_load_list_ptr);
    /* fall through */
  case OPT_PLUGIN_LOAD_ADD:
    opt_plugin_load_list_ptr->push_back(new i_string(argument));
    break;
  case OPT_SECURE_AUTH:
    push_deprecated_warn_no_replacement(NULL, "--secure-auth");
    if (!opt_secure_auth)
    {
      sql_print_error("Unsupported value 0 for secure-auth");
      return 1;
    }
    break;
  case OPT_PFS_INSTRUMENT:
    {
#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
#ifndef EMBEDDED_LIBRARY

      /*
        Parse instrument name and value from argument string. Handle leading
        and trailing spaces. Also handle single quotes.

        Acceptable:
          performance_schema_instrument = ' foo/%/bar/  =  ON  '
          performance_schema_instrument = '%=OFF'
        Not acceptable:
          performance_schema_instrument = '' foo/%/bar = ON ''
          performance_schema_instrument = '%='OFF''
      */
      char *name= argument,*p= NULL, *val= NULL;
      my_bool quote= false; /* true if quote detected */
      my_bool error= true;  /* false if no errors detected */
      const int PFS_BUFFER_SIZE= 128;
      char orig_argument[PFS_BUFFER_SIZE+1];
      orig_argument[0]= 0;

      if (!argument)
        goto pfs_error;

      /* Save original argument string for error reporting */
      strncpy(orig_argument, argument, PFS_BUFFER_SIZE);

      /* Split instrument name and value at the equal sign */
      if (!(p= strchr(argument, '=')))
        goto pfs_error;

      /* Get option value */
      val= p + 1;
      if (!*val)
        goto pfs_error;

      /* Trim leading spaces and quote from the instrument name */
      while (*name && (my_isspace(mysqld_charset, *name) || (*name == '\'')))
      {
        /* One quote allowed */
        if (*name == '\'')
        {
          if (!quote)
            quote= true;
          else
            goto pfs_error;
        }
        name++;
      }

      /* Trim trailing spaces from instrument name */
      while ((p > name) && my_isspace(mysqld_charset, p[-1]))
        p--;
      *p= 0;

      /* Remove trailing slash from instrument name */
      if (p > name && (p[-1] == '/'))
        p[-1]= 0;

      if (!*name)
        goto pfs_error;

      /* Trim leading spaces from option value */
      while (*val && my_isspace(mysqld_charset, *val))
        val++;

      /* Trim trailing spaces and matching quote from value */
      p= val + strlen(val);
      while (p > val && (my_isspace(mysqld_charset, p[-1]) || p[-1] == '\''))
      {
        /* One matching quote allowed */
        if (p[-1] == '\'')
        {
          if (quote)
            quote= false;
          else
            goto pfs_error;
        }
        p--;
      }

      *p= 0;

      if (!*val)
        goto pfs_error;

      /* Add instrument name and value to array of configuration options */
      if (add_pfs_instr_to_array(name, val))
        goto pfs_error;

      error= false;

pfs_error:
      if (error)
      {
        sql_print_warning("Invalid instrument name or value for "
                          "performance_schema_instrument '%s'",
                          orig_argument);
        return 0;
      }
#endif /* EMBEDDED_LIBRARY */
#endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */
      break;
    }
  case OPT_THREAD_CACHE_SIZE:
    thread_cache_size_specified= true;
    break;
  case OPT_HOST_CACHE_SIZE:
    host_cache_size_specified= true;
    break;
  case OPT_TABLE_DEFINITION_CACHE:
    table_definition_cache_specified= true;
    break;
  case OPT_MDL_CACHE_SIZE:
    push_deprecated_warn_no_replacement(NULL, "--metadata_locks_cache_size");
    break;
  case OPT_MDL_HASH_INSTANCES:
    push_deprecated_warn_no_replacement(NULL,
                                        "--metadata_locks_hash_instances");
    break;
  case OPT_SKIP_INNODB:
    sql_print_warning("The use of InnoDB is mandatory since MySQL 5.7. "
                      "The former options like '--innodb=0/1/OFF/ON' or "
                      "'--skip-innodb' are ignored.");
    break;
  case OPT_AVOID_TEMPORAL_UPGRADE:
    push_deprecated_warn_no_replacement(NULL, "avoid_temporal_upgrade");
    break;
  case OPT_SHOW_OLD_TEMPORALS:
    push_deprecated_warn_no_replacement(NULL, "show_old_temporals");
    break;
  case OPT_KEYRING_MIGRATION_PASSWORD:
    if (argument)
    {
      char *start= argument;
      opt_keyring_migration_password= my_strdup(PSI_NOT_INSTRUMENTED,
        argument, MYF(MY_FAE));
      while (*argument) *argument++= 'x';
      if (*start)
       start[1]= 0;
    }
    else
      opt_keyring_migration_password= get_tty_password(NullS);
    migrate_connect_options= 1;
    break;
  case OPT_KEYRING_MIGRATION_USER:
  case OPT_KEYRING_MIGRATION_HOST:
  case OPT_KEYRING_MIGRATION_SOCKET:
  case OPT_KEYRING_MIGRATION_PORT:
    migrate_connect_options= 1;
    break;
  case OPT_ENFORCE_GTID_CONSISTENCY:
  {
    const char *wrong_value=
      fixup_enforce_gtid_consistency_command_line(argument);
    if (wrong_value != NULL)
      sql_print_warning("option 'enforce-gtid-consistency': value '%s' "
                        "was not recognized. Setting enforce-gtid-consistency "
                        "to OFF.", wrong_value);
    break;
  }
  case OPT_TRANSACTION_READ_ONLY:
    global_system_variables.transaction_read_only=
                            global_system_variables.tx_read_only;
    break;
  case OPT_TRANSACTION_ISOLATION:
    global_system_variables.transaction_isolation=
                            global_system_variables.tx_isolation;
    break;
  case OPT_NAMED_PIPE_FULL_ACCESS_GROUP:
#if defined(_WIN32)  && !defined(EMBEDDED_LIBRARY)
    if (!is_valid_named_pipe_full_access_group(argument))
    {
      sql_print_error("Invalid value for named_pipe_full_access_group.");
      return 1;
    }
#endif /* _WIN32 && !EMBEDDED_LIBRARY */
    break;
  }
  return 0;
}


/** Handle arguments for multiple key caches. */

C_MODE_START

static void*
mysql_getopt_value(const char *keyname, size_t key_length,
       const struct my_option *option, int *error)
{
  if (error)
    *error= 0;
  switch (option->id) {
  case OPT_KEY_BUFFER_SIZE:
  case OPT_KEY_CACHE_BLOCK_SIZE:
  case OPT_KEY_CACHE_DIVISION_LIMIT:
  case OPT_KEY_CACHE_AGE_THRESHOLD:
  {
    KEY_CACHE *key_cache;
    if (!(key_cache= get_or_create_key_cache(keyname, key_length)))
    {
      if (error)
        *error= EXIT_OUT_OF_MEMORY;
      return 0;
    }
    switch (option->id) {
    case OPT_KEY_BUFFER_SIZE:
      return &key_cache->param_buff_size;
    case OPT_KEY_CACHE_BLOCK_SIZE:
      return &key_cache->param_block_size;
    case OPT_KEY_CACHE_DIVISION_LIMIT:
      return &key_cache->param_division_limit;
    case OPT_KEY_CACHE_AGE_THRESHOLD:
      return &key_cache->param_age_threshold;
    }
  }
  }
  return option->value;
}

C_MODE_END

/**
  Ensure all the deprecared options with 1 possible value are
  within acceptable range.

  @retval true error in the values set
  @retval false all checked
*/
bool check_ghost_options()
{
  if (global_system_variables.old_passwords == 1)
  {
    sql_print_error("Invalid old_passwords mode: 1. Valid values are 2 and 0\n");
    return true;
  }
  if (!opt_secure_auth)
  {
    sql_print_error("Invalid secure_auth mode: 0. Valid value is 1\n");
    return true;
  }

  return false;
}


/**
  Get server options from the command line,
  and perform related server initializations.
  @param [in, out] argc_ptr       command line options (count)
  @param [in, out] argv_ptr       command line options (values)
  @return 0 on success

  @todo
  - FIXME add EXIT_TOO_MANY_ARGUMENTS to "mysys_err.h" and return that code?
*/
static int get_options(int *argc_ptr, char ***argv_ptr)
{
  int ho_error;

  my_getopt_register_get_addr(mysql_getopt_value);

  /* prepare all_options array */
  all_options.reserve(array_elements(my_long_options));
  for (my_option *opt= my_long_options;
       opt < my_long_options + array_elements(my_long_options) - 1;
       opt++)
  {
    all_options.push_back(*opt);
  }
  sys_var_add_options(&all_options, sys_var::PARSE_NORMAL);
  add_terminator(&all_options);

  if (opt_help || opt_bootstrap)
  {
    /*
      Show errors during --help, but gag everything else so the info the
      user actually wants isn't lost in the spam.  (For --help --verbose,
      we need to set up far enough to be able to print variables provided
      by plugins, so a good number of warnings/notes might get printed.)
      Likewise for --bootstrap.
    */
    struct my_option *opt= &all_options[0];
    for (; opt->name; opt++)
      if (!strcmp("log_error_verbosity", opt->name))
        opt->def_value= opt_initialize ? 2 : 1;
  }

  /* Skip unknown options so that they may be processed later by plugins */
  my_getopt_skip_unknown= TRUE;

  if ((ho_error= handle_options(argc_ptr, argv_ptr, &all_options[0],
                                mysqld_get_one_option)))
    return ho_error;

  if (!opt_help)
    vector<my_option>().swap(all_options);  // Deletes the vector contents.

  /* Add back the program name handle_options removes */
  (*argc_ptr)++;
  (*argv_ptr)--;

  /*
    Options have been parsed. Now some of them need additional special
    handling, like custom value checking, checking of incompatibilites
    between options, setting of multiple variables, etc.
    Do them here.
  */

  if (!opt_help && opt_verbose)
    sql_print_error("--verbose is for use with --help; "
                    "did you mean --log-error-verbosity?");

  if ((opt_log_slow_admin_statements || opt_log_queries_not_using_indexes ||
       opt_log_slow_slave_statements) &&
      !opt_slow_log)
    sql_print_warning("options --log-slow-admin-statements, "
                      "--log-queries-not-using-indexes and "
                      "--log-slow-slave-statements have no effect if "
                      "--slow-query-log is not set");
  if (global_system_variables.net_buffer_length >
      global_system_variables.max_allowed_packet)
  {
    sql_print_warning("net_buffer_length (%lu) is set to be larger "
                      "than max_allowed_packet (%lu). Please rectify.",
                      global_system_variables.net_buffer_length,
                      global_system_variables.max_allowed_packet);
  }

  /*
    TIMESTAMP columns get implicit DEFAULT values when
    --explicit_defaults_for_timestamp is not set.
    This behavior is deprecated now.
  */
  if (!opt_help && !global_system_variables.explicit_defaults_for_timestamp)
    sql_print_warning("TIMESTAMP with implicit DEFAULT value is deprecated. "
                      "Please use --explicit_defaults_for_timestamp server "
                      "option (see documentation for more details).");

  opt_init_connect.length=strlen(opt_init_connect.str);
  opt_init_slave.length=strlen(opt_init_slave.str);

  if (global_system_variables.low_priority_updates)
    thr_upgraded_concurrent_insert_lock= TL_WRITE_LOW_PRIORITY;

  if (ft_boolean_check_syntax_string((uchar*) ft_boolean_syntax))
  {
    sql_print_error("Invalid ft-boolean-syntax string: %s\n",
                    ft_boolean_syntax);
    return 1;
  }

  if (opt_disable_networking)
    mysqld_port= 0;

  if (opt_skip_show_db)
    opt_specialflag|= SPECIAL_SKIP_SHOW_DB;

  if (check_ghost_options())
    return 1;

  if (myisam_flush)
    flush_time= 0;

#ifdef HAVE_REPLICATION
  if (opt_slave_skip_errors)
    add_slave_skip_errors(opt_slave_skip_errors);
#endif

  if (global_system_variables.max_join_size == HA_POS_ERROR)
    global_system_variables.option_bits|= OPTION_BIG_SELECTS;
  else
    global_system_variables.option_bits&= ~OPTION_BIG_SELECTS;

  // Synchronize @@global.autocommit on --autocommit
  const ulonglong turn_bit_on= opt_autocommit ?
    OPTION_AUTOCOMMIT : OPTION_NOT_AUTOCOMMIT;
  global_system_variables.option_bits=
    (global_system_variables.option_bits &
     ~(OPTION_NOT_AUTOCOMMIT | OPTION_AUTOCOMMIT)) | turn_bit_on;

  global_system_variables.sql_mode=
    expand_sql_mode(global_system_variables.sql_mode, NULL);

  if (!(global_system_variables.sql_mode & MODE_NO_AUTO_CREATE_USER))
  {
    sql_print_warning("'NO_AUTO_CREATE_USER' sql mode was not set.");
  }

  if (!my_enable_symlinks)
    have_symlink= SHOW_OPTION_DISABLED;

  /* Set global MyISAM variables from delay_key_write_options */
  fix_delay_key_write(0, 0, OPT_GLOBAL);

#ifndef EMBEDDED_LIBRARY
#ifndef _WIN32
  if (mysqld_chroot)
    set_root(mysqld_chroot);
#endif
#else
  max_allowed_packet= global_system_variables.max_allowed_packet;
  net_buffer_length= global_system_variables.net_buffer_length;
#endif
  if (fix_paths())
    return 1;

  /*
    Set some global variables from the global_system_variables
    In most cases the global variables will not be used
  */
  my_disable_locking= myisam_single_user= MY_TEST(opt_external_locking == 0);
  my_default_record_cache_size=global_system_variables.read_buff_size;

  global_system_variables.long_query_time= (ulonglong)
    (global_system_variables.long_query_time_double * 1e6);

  init_log_slow_verbosity();
  init_slow_query_log_use_global_control();
  init_log_slow_sp_statements();
  if (opt_short_log_format)
    opt_specialflag|= SPECIAL_SHORT_LOG_FORMAT;

  if (init_global_datetime_format(MYSQL_TIMESTAMP_DATE,
                                  &global_date_format) ||
      init_global_datetime_format(MYSQL_TIMESTAMP_TIME,
                                  &global_time_format) ||
      init_global_datetime_format(MYSQL_TIMESTAMP_DATETIME,
                                  &global_datetime_format))
    return 1;

  if (Global_THD_manager::create_instance())
  {
    sql_print_error("Could not allocate memory for thread handling");
    return 1;
  }

  /* If --super-read-only was specified, set read_only to 1 */
  read_only= super_read_only ? super_read_only : read_only;
  opt_readonly= read_only;

  return 0;
}


/*
  Create version name for running mysqld version
  We automaticly add suffixes -debug, -embedded, -log, -valgrind and -asan
  to the version name to make the version more descriptive.
  (MYSQL_SERVER_SUFFIX is set by the compilation environment)
*/

static void set_server_version(void)
{
  char *end= strxmov(server_version, MYSQL_SERVER_VERSION,
                     MYSQL_SERVER_SUFFIX_STR, NullS);
#ifdef EMBEDDED_LIBRARY
  end= my_stpcpy(end, "-embedded");
#endif
#ifndef NDEBUG
  if (!strstr(MYSQL_SERVER_SUFFIX_STR, "-debug"))
    end= my_stpcpy(end, "-debug");
#endif
  if (opt_general_log || opt_slow_log || opt_bin_log)
    end= my_stpcpy(end, "-log");          // This may slow down system
#ifdef HAVE_VALGRIND
  if (SERVER_VERSION_LENGTH - (end - server_version) >
      static_cast<int>(sizeof("-valgrind")))
    end= my_stpcpy(end, "-valgrind");
#endif
#ifdef HAVE_ASAN
  if (SERVER_VERSION_LENGTH - (end - server_version) >
      static_cast<int>(sizeof("-asan")))
    end= my_stpcpy(end, "-asan");
#endif

  assert(end < server_version + SERVER_VERSION_LENGTH);
  my_stpcpy(server_version_suffix, server_version + strlen(MYSQL_SERVER_VERSION));
}


static char *get_relative_path(const char *path)
{
  if (test_if_hard_path(path) &&
      is_prefix(path,DEFAULT_MYSQL_HOME) &&
      strcmp(DEFAULT_MYSQL_HOME,FN_ROOTDIR))
  {
    path+= strlen(DEFAULT_MYSQL_HOME);
    while (is_directory_separator(*path))
      path++;
  }
  return (char*) path;
}


/**
  Fix filename and replace extension where 'dir' is relative to
  mysql_real_data_home.
  @return
    1 if len(path) > FN_REFLEN
*/

bool
fn_format_relative_to_data_home(char * to, const char *name,
        const char *dir, const char *extension)
{
  char tmp_path[FN_REFLEN];
  if (!test_if_hard_path(dir))
  {
    strxnmov(tmp_path,sizeof(tmp_path)-1, mysql_real_data_home,
       dir, NullS);
    dir=tmp_path;
  }
  return !fn_format(to, name, dir, extension,
        MY_APPEND_EXT | MY_UNPACK_FILENAME | MY_SAFE_PATH);
}


/**
  Test a file path to determine if the path is compatible with the secure file
  path restriction.

  @param path null terminated character string

  @return
    @retval TRUE The path is secure
    @retval FALSE The path isn't secure
*/

bool is_secure_file_path(char *path)
{
  char buff1[FN_REFLEN], buff2[FN_REFLEN];
  size_t opt_secure_file_priv_len;
  /*
    All paths are secure if opt_secure_file_priv is 0
  */
  if (!opt_secure_file_priv[0])
    return TRUE;

  opt_secure_file_priv_len= strlen(opt_secure_file_priv);

  if (strlen(path) >= FN_REFLEN)
    return FALSE;

  if (!my_strcasecmp(system_charset_info, opt_secure_file_priv, "NULL"))
    return FALSE;

  if (my_realpath(buff1, path, 0))
  {
    /*
      The supplied file path might have been a file and not a directory.
    */
    int length= (int)dirname_length(path);
    if (length >= FN_REFLEN)
      return FALSE;
    memcpy(buff2, path, length);
    buff2[length]= '\0';
    if (length == 0 || my_realpath(buff1, buff2, 0))
      return FALSE;
  }
  convert_dirname(buff2, buff1, NullS);
  if (!lower_case_file_system)
  {
    if (strncmp(opt_secure_file_priv, buff2, opt_secure_file_priv_len))
      return FALSE;
  }
  else
  {
    if (files_charset_info->coll->strnncoll(files_charset_info,
                                            (uchar *) buff2, strlen(buff2),
                                            (uchar *) opt_secure_file_priv,
                                            opt_secure_file_priv_len,
                                            TRUE))
      return FALSE;
  }
  return TRUE;
}


/**
  check_secure_file_priv_path : Checks path specified through
  --secure-file-priv and raises warning in following cases:
  1. If path is empty string or NULL and mysqld is not running
     with --bootstrap mode.
  2. If path can access data directory
  3. If path points to a directory which is accessible by
     all OS users (non-Windows build only)

  It throws error in following cases:

  1. If path normalization fails
  2. If it can not get stats of the directory

  @params NONE

  Assumptions :
  1. Data directory path has been normalized
  2. opt_secure_file_priv has been normalized unless it is set
     to "NULL".

  @returns Status of validation
    @retval true : Validation is successful with/without warnings
    @retval false : Validation failed. Error is raised.
*/

bool check_secure_file_priv_path()
{
  char datadir_buffer[FN_REFLEN+1]={0};
  char plugindir_buffer[FN_REFLEN+1]={0};
  char whichdir[20]= {0};
  size_t opt_plugindir_len= 0;
  size_t opt_datadir_len= 0;
  size_t opt_secure_file_priv_len= 0;
  bool warn= false;
  bool case_insensitive_fs;
#ifndef _WIN32
  MY_STAT dir_stat;
#endif

  if (!opt_secure_file_priv[0])
  {
    if (opt_bootstrap)
    {
      /*
        Do not impose --secure-file-priv restriction
        in --bootstrap mode
      */
      sql_print_information("Ignoring --secure-file-priv value as server is "
                            "running with --initialize(-insecure) or "
                            "--bootstrap.");
    }
    else
    {
      sql_print_warning("Insecure configuration for --secure-file-priv: "
                        "Current value does not restrict location of generated "
                        "files. Consider setting it to a valid, "
                        "non-empty path.");
    }
    return true;
  }

  /*
    Setting --secure-file-priv to NULL would disable
    reading/writing from/to file
  */
  if(!my_strcasecmp(system_charset_info, opt_secure_file_priv, "NULL"))
  {
    sql_print_information("--secure-file-priv is set to NULL. "
                          "Operations related to importing and exporting "
                          "data are disabled");
    return true;
  }

  /*
    Check if --secure-file-priv can access data directory
  */
  opt_secure_file_priv_len= strlen(opt_secure_file_priv);

  /*
    Adds dir seperator at the end.
    This is required in subsequent comparison
  */
  convert_dirname(datadir_buffer, mysql_unpacked_real_data_home, NullS);
  opt_datadir_len= strlen(datadir_buffer);

  case_insensitive_fs=
    (test_if_case_insensitive(datadir_buffer) == 1);

  if (!case_insensitive_fs)
  {
    if (!strncmp(datadir_buffer, opt_secure_file_priv,
          opt_datadir_len < opt_secure_file_priv_len ?
          opt_datadir_len : opt_secure_file_priv_len))
    {
      warn= true;
      strcpy(whichdir, "Data directory");
    }
  }
  else
  {
    if (!files_charset_info->coll->strnncoll(files_charset_info,
          (uchar *) datadir_buffer,
          opt_datadir_len,
          (uchar *) opt_secure_file_priv,
          opt_secure_file_priv_len,
          TRUE))
    {
      warn= true;
      strcpy(whichdir, "Data directory");
    }
  }

  /*
    Don't bother comparing --secure-file-priv with --plugin-dir
    if we already have a match against --datdir or
    --plugin-dir is not pointing to a valid directory.
  */
  if (!warn && !my_realpath(plugindir_buffer, opt_plugin_dir, 0))
  {
    convert_dirname(plugindir_buffer, plugindir_buffer, NullS);
    opt_plugindir_len= strlen(plugindir_buffer);

    if (!case_insensitive_fs)
    {
      if (!strncmp(plugindir_buffer, opt_secure_file_priv,
          opt_plugindir_len < opt_secure_file_priv_len ?
          opt_plugindir_len : opt_secure_file_priv_len))
      {
        warn= true;
        strcpy(whichdir, "Plugin directory");
      }
    }
    else
    {
      if (!files_charset_info->coll->strnncoll(files_charset_info,
          (uchar *) plugindir_buffer,
          opt_plugindir_len,
          (uchar *) opt_secure_file_priv,
          opt_secure_file_priv_len,
          TRUE))
      {
        warn= true;
        strcpy(whichdir, "Plugin directory");
      }
    }
  }


  if (warn)
    sql_print_warning("Insecure configuration for --secure-file-priv: "
                      "%s is accessible through "
                      "--secure-file-priv. Consider choosing a different "
                      "directory.", whichdir);

#ifndef _WIN32
  /*
     Check for --secure-file-priv directory's permission
  */
  if (!(my_stat(opt_secure_file_priv, &dir_stat, MYF(0))))
  {
    sql_print_error("Failed to get stat for directory pointed out "
                    "by --secure-file-priv");
    return false;
  }

  if (dir_stat.st_mode & S_IRWXO)
    sql_print_warning("Insecure configuration for --secure-file-priv: "
                      "Location is accessible to all OS users. "
                      "Consider choosing a different directory.");
#endif
  return true;
}

static int fix_paths(void)
{
  char buff[FN_REFLEN];
  bool secure_file_priv_nonempty= false;
  convert_dirname(mysql_home,mysql_home,NullS);
  /* Resolve symlinks to allow 'mysql_home' to be a relative symlink */
  my_realpath(mysql_home,mysql_home,MYF(0));
  /* Ensure that mysql_home ends in FN_LIBCHAR */
  char *pos= strend(mysql_home);
  if (pos == mysql_home || pos[-1] != FN_LIBCHAR)
  {
    pos[0]= FN_LIBCHAR;
    pos[1]= 0;
  }
  convert_dirname(lc_messages_dir, lc_messages_dir, NullS);
  convert_dirname(mysql_real_data_home,mysql_real_data_home,NullS);
  (void) my_load_path(mysql_home,mysql_home,""); // Resolve current dir
  (void) my_load_path(mysql_real_data_home,mysql_real_data_home,mysql_home);
  (void) my_load_path(pidfile_name, pidfile_name_ptr, mysql_real_data_home);

  convert_dirname(opt_plugin_dir, opt_plugin_dir_ptr ? opt_plugin_dir_ptr :
                                  get_relative_path(PLUGINDIR), NullS);
  (void) my_load_path(opt_plugin_dir, opt_plugin_dir, mysql_home);
  opt_plugin_dir_ptr= opt_plugin_dir;

  my_realpath(mysql_unpacked_real_data_home, mysql_real_data_home, MYF(0));
  mysql_unpacked_real_data_home_len=
    strlen(mysql_unpacked_real_data_home);
  if (mysql_unpacked_real_data_home[mysql_unpacked_real_data_home_len-1] == FN_LIBCHAR)
    --mysql_unpacked_real_data_home_len;

  char *sharedir=get_relative_path(SHAREDIR);
  if (test_if_hard_path(sharedir))
    strmake(buff,sharedir,sizeof(buff)-1);    /* purecov: tested */
  else
    strxnmov(buff,sizeof(buff)-1,mysql_home,sharedir,NullS);
  convert_dirname(buff,buff,NullS);
  (void) my_load_path(lc_messages_dir, lc_messages_dir, buff);

  /* If --character-sets-dir isn't given, use shared library dir */
  if (charsets_dir)
    strmake(mysql_charsets_dir, charsets_dir, sizeof(mysql_charsets_dir)-1);
  else
    strxnmov(mysql_charsets_dir, sizeof(mysql_charsets_dir)-1, buff,
       CHARSET_DIR, NullS);
  (void) my_load_path(mysql_charsets_dir, mysql_charsets_dir, buff);
  convert_dirname(mysql_charsets_dir, mysql_charsets_dir, NullS);
  charsets_dir=mysql_charsets_dir;

  if (init_tmpdir(&mysql_tmpdir_list, opt_mysql_tmpdir))
    return 1;
  if (!opt_mysql_tmpdir)
    opt_mysql_tmpdir= mysql_tmpdir;
#ifdef HAVE_REPLICATION
  if (!slave_load_tmpdir)
    slave_load_tmpdir= mysql_tmpdir;
#endif /* HAVE_REPLICATION */
  /*
    Convert the secure-file-priv option to system format, allowing
    a quick strcmp to check if read or write is in an allowed dir
  */
  if (opt_bootstrap)
    opt_secure_file_priv= EMPTY_STR.str;
  secure_file_priv_nonempty= opt_secure_file_priv[0] ? true : false;

  if (secure_file_priv_nonempty && strlen(opt_secure_file_priv) > FN_REFLEN)
  {
    sql_print_warning("Value for --secure-file-priv is longer than maximum "
                      "limit of %d", FN_REFLEN-1);
    return 1;
  }

  memset(buff, 0, sizeof(buff));
  if (secure_file_priv_nonempty &&
      my_strcasecmp(system_charset_info, opt_secure_file_priv, "NULL"))
  {
    int retval= my_realpath(buff, opt_secure_file_priv, MYF(MY_WME));
    if (!retval)
    {
      convert_dirname(secure_file_real_path, buff, NullS);
#ifdef WIN32
      MY_DIR *dir= my_dir(secure_file_real_path, MYF(MY_DONT_SORT+MY_WME));
      if (!dir)
      {
        retval= 1;
      }
      else
      {
        my_dirend(dir);
      }
#endif
    }

    if (retval)
    {
      char err_buffer[FN_REFLEN];
      my_snprintf(err_buffer, FN_REFLEN-1,
                  "Failed to access directory for --secure-file-priv."
                  " Please make sure that directory exists and is "
                  "accessible by MySQL Server. Supplied value : %s",
                  opt_secure_file_priv);
      err_buffer[FN_REFLEN-1]='\0';
      sql_print_error("%s", err_buffer);
      return 1;
    }
    opt_secure_file_priv= secure_file_real_path;
  }

  if (!check_secure_file_priv_path())
    return 1;

  return 0;
}

/**
  Check if file system used for databases is case insensitive.

  @param dir_name     Directory to test

  @retval
    -1  Don't know (Test failed)
  @retval
    0   File system is case sensitive
  @retval
    1   File system is case insensitive
*/

static int test_if_case_insensitive(const char *dir_name)
{
  int result= 0;
  File file;
  char buff[FN_REFLEN], buff2[FN_REFLEN];
  MY_STAT stat_info;
  DBUG_ENTER("test_if_case_insensitive");

  fn_format(buff, glob_hostname, dir_name, ".lower-test",
      MY_UNPACK_FILENAME | MY_REPLACE_EXT | MY_REPLACE_DIR);
  fn_format(buff2, glob_hostname, dir_name, ".LOWER-TEST",
      MY_UNPACK_FILENAME | MY_REPLACE_EXT | MY_REPLACE_DIR);
  mysql_file_delete(key_file_casetest, buff2, MYF(0));
  if ((file= mysql_file_create(key_file_casetest,
                               buff, 0666, O_RDWR, MYF(0))) < 0)
  {
    sql_print_warning("Can't create test file %s", buff);
    DBUG_RETURN(-1);
  }
  mysql_file_close(file, MYF(0));
  if (mysql_file_stat(key_file_casetest, buff2, &stat_info, MYF(0)))
    result= 1;          // Can access file
  mysql_file_delete(key_file_casetest, buff, MYF(MY_WME));
  DBUG_PRINT("exit", ("result: %d", result));
  DBUG_RETURN(result);
}


#ifndef EMBEDDED_LIBRARY

/**
  Create file to store pid number.
*/
static void create_pid_file()
{
  File file;
  bool check_parent_path= 1, is_path_accessible= 1;
  char pid_filepath[FN_REFLEN], *pos= NULL;
  /* Copy pid file name to get pid file path */
  strcpy(pid_filepath, pidfile_name);

  /* Iterate through the entire path to check if even one of the sub-dirs
     is world-writable */
  while (check_parent_path && (pos= strrchr(pid_filepath, FN_LIBCHAR))
         && (pos != pid_filepath)) /* shouldn't check root */
  {
    *pos= '\0';  /* Trim the inner-most dir */
    switch (is_file_or_dir_world_writable(pid_filepath))
    {
      case -2:
        is_path_accessible= 0;
        break;
      case -1:
        sql_print_error("Can't start server: can't check PID filepath: %s",
                        strerror(errno));
        exit(MYSQLD_ABORT_EXIT);
      case 1:
        sql_print_warning("Insecure configuration for --pid-file: Location "
                          "'%s' in the path is accessible to all OS users. "
                          "Consider choosing a different directory.",
                          pid_filepath);
        check_parent_path= 0;
        break;
      case 0:
        continue; /* Keep checking the parent dir */
    }
  }
  if (!is_path_accessible)
  {
    sql_print_warning("Few location(s) are inaccessible while checking PID filepath.");
  }
  if ((file= mysql_file_create(key_file_pid, pidfile_name, 0664,
                               O_WRONLY | O_TRUNC, MYF(MY_WME))) >= 0)
  {
    char buff[MAX_BIGINT_WIDTH + 1], *end;
    end= int10_to_str((long) getpid(), buff, 10);
    *end++= '\n';
    if (!mysql_file_write(file, (uchar*) buff, (uint) (end-buff),
                          MYF(MY_WME | MY_NABP)))
    {
      mysql_file_close(file, MYF(0));
      pid_file_created= true;
      return;
    }
    mysql_file_close(file, MYF(0));
  }
  sql_print_error("Can't start server: can't create PID file: %s",
                  strerror(errno));
  exit(MYSQLD_ABORT_EXIT);
}


/**
  Remove the process' pid file.

  @param  flags  file operation flags
*/

static void delete_pid_file(myf flags)
{
  File file;
  if (opt_bootstrap ||
      !pid_file_created ||
      !(file= mysql_file_open(key_file_pid, pidfile_name,
                              O_RDONLY, flags)))
    return;

  if (file == -1)
  {
    sql_print_information("Unable to delete pid file: %s", strerror(errno));
    return;
  }

  uchar buff[MAX_BIGINT_WIDTH + 1];
  /* Make sure that the pid file was created by the same process. */
  size_t error= mysql_file_read(file, buff, sizeof(buff), flags);
  mysql_file_close(file, flags);
  buff[sizeof(buff) - 1]= '\0';
  if (error != MY_FILE_ERROR &&
      atol((char *) buff) == (long) getpid())
  {
    mysql_file_delete(key_file_pid, pidfile_name, flags);
    pid_file_created= false;
  }
  return;
}
#endif /* EMBEDDED_LIBRARY */


/**
  Returns the current state of the server : booting, operational or shutting
  down.

  @return
    SERVER_BOOTING        Server is not operational. It is starting.
    SERVER_OPERATING      Server is fully initialized and operating.
    SERVER_SHUTTING_DOWN  Server is shutting down.
*/
enum_server_operational_state get_server_state()
{
  return server_operational_state;
}

/**
  Reset status for all threads.
*/
class Reset_thd_status : public Do_THD_Impl
{
public:
  Reset_thd_status() { }
  virtual void operator()(THD *thd)
  {
    /*
      Add thread's status variabes to global status
      and reset thread's status variables.
    */
    add_to_status(&global_status_var, &thd->status_var, true);
  }
};

/**
  Reset global and session status variables.
*/
void refresh_status(THD *thd)
{
  mysql_mutex_lock(&LOCK_status);

  if (show_compatibility_56)
  {
    /*
      Add thread's status variabes to global status
      and reset current thread's status variables.
    */
    add_to_status(&global_status_var, &thd->status_var, true);
  }
  else
  {
    /* For all threads, add status to global status and then reset. */
    Reset_thd_status reset_thd_status;
    Global_THD_manager::get_instance()->do_for_all_thd_copy(&reset_thd_status);
#ifndef EMBEDDED_LIBRARY
#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
    /* Reset aggregated status counters. */
    reset_pfs_status_stats();
#endif
#endif
  }

  /* Reset some global variables. */
  reset_status_vars();

  /* Reset the counters of all key caches (default and named). */
  process_key_caches(reset_key_cache_counters);
  flush_status_time= time((time_t*) 0);
  mysql_mutex_unlock(&LOCK_status);

#ifndef EMBEDDED_LIBRARY
  /*
    Set max_used_connections to the number of currently open
    connections.  Do this out of LOCK_status to avoid deadlocks.
    Status reset becomes not atomic, but status data is not exact anyway.
  */
  Connection_handler_manager::reset_max_used_connections();
#endif
}


/*****************************************************************************
  Instantiate variables for missing storage engines
  This section should go away soon
*****************************************************************************/

#ifdef HAVE_PSI_INTERFACE
PSI_mutex_key key_LOCK_tc;

#ifdef HAVE_OPENSSL
PSI_mutex_key key_LOCK_des_key_file;
#endif /* HAVE_OPENSSL */

PSI_mutex_key key_LOCK_temporary_tables;
PSI_mutex_key key_BINLOG_LOCK_commit;
PSI_mutex_key key_BINLOG_LOCK_commit_queue;
PSI_mutex_key key_BINLOG_LOCK_done;
PSI_mutex_key key_BINLOG_LOCK_flush_queue;
PSI_mutex_key key_BINLOG_LOCK_index;
PSI_mutex_key key_BINLOG_LOCK_log;
PSI_mutex_key key_BINLOG_LOCK_binlog_end_pos;
PSI_mutex_key key_BINLOG_LOCK_sync;
PSI_mutex_key key_BINLOG_LOCK_sync_queue;
PSI_mutex_key key_BINLOG_LOCK_xids;
PSI_mutex_key
  key_hash_filo_lock,
  Gtid_set::key_gtid_executed_free_intervals_mutex,
  key_LOCK_crypt, key_LOCK_error_log,
  key_LOCK_global_user_client_stats,
  key_LOCK_global_table_stats, key_LOCK_global_index_stats,
  key_LOCK_gdl, key_LOCK_global_system_variables,
  key_LOCK_manager,
  key_LOCK_prepared_stmt_count,
  key_LOCK_server_started, key_LOCK_status,
  key_LOCK_sql_slave_skip_counter,
  key_LOCK_slave_net_timeout,
  key_LOCK_slave_trans_dep_tracker,
  key_LOCK_system_variables_hash, key_LOCK_table_share, key_LOCK_thd_data,
  key_LOCK_thd_sysvar,
  key_LOCK_user_conn, key_LOCK_uuid_generator, key_LOG_LOCK_log,
  key_master_info_data_lock, key_master_info_run_lock,
  key_master_info_sleep_lock, key_master_info_thd_lock,
  key_mutex_slave_reporting_capability_err_lock, key_relay_log_info_data_lock,
  key_relay_log_info_sleep_lock, key_relay_log_info_thd_lock,
  key_relay_log_info_log_space_lock, key_relay_log_info_run_lock,
  key_mutex_slave_parallel_pend_jobs, key_mutex_mts_temp_tables_lock,
  key_mutex_slave_parallel_worker_count,
  key_mutex_slave_parallel_worker,
  key_structure_guard_mutex, key_TABLE_SHARE_LOCK_ha_data,
  key_LOCK_error_messages,
  key_LOCK_log_throttle_qni, key_LOCK_query_plan, key_LOCK_thd_query,
  key_LOCK_cost_const, key_LOCK_current_cond,
  key_LOCK_keyring_operations;
PSI_mutex_key key_RELAYLOG_LOCK_commit;
PSI_mutex_key key_RELAYLOG_LOCK_commit_queue;
PSI_mutex_key key_RELAYLOG_LOCK_done;
PSI_mutex_key key_RELAYLOG_LOCK_flush_queue;
PSI_mutex_key key_RELAYLOG_LOCK_index;
PSI_mutex_key key_RELAYLOG_LOCK_log;
PSI_mutex_key key_RELAYLOG_LOCK_sync;
PSI_mutex_key key_RELAYLOG_LOCK_sync_queue;
PSI_mutex_key key_RELAYLOG_LOCK_xids;
PSI_mutex_key key_LOCK_sql_rand;
PSI_mutex_key key_gtid_ensure_index_mutex;
PSI_mutex_key key_mts_temp_table_LOCK;
PSI_mutex_key key_LOCK_reset_gtid_table;
PSI_mutex_key key_LOCK_compress_gtid_table;
PSI_mutex_key key_mts_gaq_LOCK;
PSI_mutex_key key_thd_timer_mutex;
PSI_mutex_key key_LOCK_offline_mode;
PSI_mutex_key key_LOCK_default_password_lifetime;

#ifdef HAVE_REPLICATION
PSI_mutex_key key_commit_order_manager_mutex;
PSI_mutex_key key_mutex_slave_worker_hash;
#endif

static PSI_mutex_info all_server_mutexes[]=
{
  { &key_LOCK_tc, "TC_LOG_MMAP::LOCK_tc", 0},

#ifdef HAVE_OPENSSL
  { &key_LOCK_des_key_file, "LOCK_des_key_file", PSI_FLAG_GLOBAL},
#endif /* HAVE_OPENSSL */

  { &key_BINLOG_LOCK_commit, "MYSQL_BIN_LOG::LOCK_commit", 0 },
  { &key_BINLOG_LOCK_commit_queue, "MYSQL_BIN_LOG::LOCK_commit_queue", 0 },
  { &key_BINLOG_LOCK_done, "MYSQL_BIN_LOG::LOCK_done", 0 },
  { &key_BINLOG_LOCK_flush_queue, "MYSQL_BIN_LOG::LOCK_flush_queue", 0 },
  { &key_BINLOG_LOCK_index, "MYSQL_BIN_LOG::LOCK_index", 0},
  { &key_BINLOG_LOCK_log, "MYSQL_BIN_LOG::LOCK_log", 0},
  { &key_BINLOG_LOCK_binlog_end_pos, "MYSQL_BIN_LOG::LOCK_binlog_end_pos", 0},
  { &key_BINLOG_LOCK_sync, "MYSQL_BIN_LOG::LOCK_sync", 0},
  { &key_BINLOG_LOCK_sync_queue, "MYSQL_BIN_LOG::LOCK_sync_queue", 0 },
  { &key_BINLOG_LOCK_xids, "MYSQL_BIN_LOG::LOCK_xids", 0 },
  { &key_RELAYLOG_LOCK_commit, "MYSQL_RELAY_LOG::LOCK_commit", 0},
  { &key_RELAYLOG_LOCK_commit_queue, "MYSQL_RELAY_LOG::LOCK_commit_queue", 0 },
  { &key_RELAYLOG_LOCK_done, "MYSQL_RELAY_LOG::LOCK_done", 0 },
  { &key_RELAYLOG_LOCK_flush_queue, "MYSQL_RELAY_LOG::LOCK_flush_queue", 0 },
  { &key_RELAYLOG_LOCK_index, "MYSQL_RELAY_LOG::LOCK_index", 0},
  { &key_RELAYLOG_LOCK_log, "MYSQL_RELAY_LOG::LOCK_log", 0},
  { &key_RELAYLOG_LOCK_sync, "MYSQL_RELAY_LOG::LOCK_sync", 0},
  { &key_RELAYLOG_LOCK_sync_queue, "MYSQL_RELAY_LOG::LOCK_sync_queue", 0 },
  { &key_RELAYLOG_LOCK_xids, "MYSQL_RELAY_LOG::LOCK_xids", 0},
  { &key_hash_filo_lock, "hash_filo::lock", 0},
  { &Gtid_set::key_gtid_executed_free_intervals_mutex, "Gtid_set::gtid_executed::free_intervals_mutex", 0 },
  { &key_LOCK_bloom_filter, "Bloom_filter", 0},
  { &key_LOCK_crypt, "LOCK_crypt", PSI_FLAG_GLOBAL},
  { &key_LOCK_error_log, "LOCK_error_log", PSI_FLAG_GLOBAL},
  { &key_LOCK_global_user_client_stats,
    "LOCK_global_user_client_stats", PSI_FLAG_GLOBAL},
  { &key_LOCK_global_table_stats,
     "LOCK_global_table_stats", PSI_FLAG_GLOBAL},
  { &key_LOCK_global_index_stats,
    "LOCK_global_index_stats", PSI_FLAG_GLOBAL},
  { &key_LOCK_gdl, "LOCK_gdl", PSI_FLAG_GLOBAL},
  { &key_LOCK_global_system_variables, "LOCK_global_system_variables", PSI_FLAG_GLOBAL},
#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
  { &key_LOCK_handler_count, "LOCK_handler_count", PSI_FLAG_GLOBAL},
#endif
  { &key_LOCK_manager, "LOCK_manager", PSI_FLAG_GLOBAL},
  { &key_LOCK_prepared_stmt_count, "LOCK_prepared_stmt_count", PSI_FLAG_GLOBAL},
  { &key_LOCK_sql_slave_skip_counter, "LOCK_sql_slave_skip_counter", PSI_FLAG_GLOBAL},
  { &key_LOCK_slave_net_timeout, "LOCK_slave_net_timeout", PSI_FLAG_GLOBAL},
  { &key_LOCK_slave_trans_dep_tracker, "LOCK_slave_trans_dep_tracker", PSI_FLAG_GLOBAL},
  { &key_LOCK_server_started, "LOCK_server_started", PSI_FLAG_GLOBAL},
  { &key_LOCK_keyring_operations, "LOCK_keyring_operations", PSI_FLAG_GLOBAL},
#if !defined(EMBEDDED_LIBRARY) && !defined(_WIN32)
  { &key_LOCK_socket_listener_active, "LOCK_socket_listener_active", PSI_FLAG_GLOBAL},
  { &key_LOCK_start_signal_handler, "LOCK_start_signal_handler", PSI_FLAG_GLOBAL},
#endif
  { &key_LOCK_status, "LOCK_status", PSI_FLAG_GLOBAL},
  { &key_LOCK_system_variables_hash, "LOCK_system_variables_hash", PSI_FLAG_GLOBAL},
  { &key_LOCK_table_share, "LOCK_table_share", PSI_FLAG_GLOBAL},
  { &key_LOCK_temporary_tables, "THD::LOCK_temporary_tables", 0},
  { &key_LOCK_thd_data, "THD::LOCK_thd_data", PSI_FLAG_VOLATILITY_SESSION},
  { &key_LOCK_thd_query, "THD::LOCK_thd_query", PSI_FLAG_VOLATILITY_SESSION},
  { &key_LOCK_thd_sysvar, "THD::LOCK_thd_sysvar", PSI_FLAG_VOLATILITY_SESSION},
  { &key_LOCK_user_conn, "LOCK_user_conn", PSI_FLAG_GLOBAL},
  { &key_LOCK_uuid_generator, "LOCK_uuid_generator", PSI_FLAG_GLOBAL},
  { &key_LOCK_sql_rand, "LOCK_sql_rand", PSI_FLAG_GLOBAL},
  { &key_LOG_LOCK_log, "LOG::LOCK_log", 0},
  { &key_master_info_data_lock, "Master_info::data_lock", 0},
  { &key_master_info_run_lock, "Master_info::run_lock", 0},
  { &key_master_info_sleep_lock, "Master_info::sleep_lock", 0},
  { &key_master_info_thd_lock, "Master_info::info_thd_lock", 0},
  { &key_mutex_slave_reporting_capability_err_lock, "Slave_reporting_capability::err_lock", 0},
  { &key_relay_log_info_data_lock, "Relay_log_info::data_lock", 0},
  { &key_relay_log_info_sleep_lock, "Relay_log_info::sleep_lock", 0},
  { &key_relay_log_info_thd_lock, "Relay_log_info::info_thd_lock", 0},
  { &key_relay_log_info_log_space_lock, "Relay_log_info::log_space_lock", 0},
  { &key_relay_log_info_run_lock, "Relay_log_info::run_lock", 0},
  { &key_mutex_slave_parallel_pend_jobs, "Relay_log_info::pending_jobs_lock", 0},
  { &key_mutex_slave_parallel_worker_count, "Relay_log_info::exit_count_lock", 0},
  { &key_mutex_mts_temp_tables_lock, "Relay_log_info::temp_tables_lock", 0},
  { &key_mutex_slave_parallel_worker, "Worker_info::jobs_lock", 0},
  { &key_structure_guard_mutex, "Query_cache::structure_guard_mutex", 0},
  { &key_TABLE_SHARE_LOCK_ha_data, "TABLE_SHARE::LOCK_ha_data", 0},
  { &key_LOCK_error_messages, "LOCK_error_messages", PSI_FLAG_GLOBAL},
  { &key_LOCK_log_throttle_qni, "LOCK_log_throttle_qni", PSI_FLAG_GLOBAL},
  { &key_gtid_ensure_index_mutex, "Gtid_state", PSI_FLAG_GLOBAL},
  { &key_LOCK_query_plan, "THD::LOCK_query_plan", PSI_FLAG_VOLATILITY_SESSION},
  { &key_LOCK_cost_const, "Cost_constant_cache::LOCK_cost_const",
    PSI_FLAG_GLOBAL},
  { &key_LOCK_current_cond, "THD::LOCK_current_cond", PSI_FLAG_VOLATILITY_SESSION},
  { &key_mts_temp_table_LOCK, "key_mts_temp_table_LOCK", 0},
  { &key_LOCK_reset_gtid_table, "LOCK_reset_gtid_table", PSI_FLAG_GLOBAL},
  { &key_LOCK_compress_gtid_table, "LOCK_compress_gtid_table", PSI_FLAG_GLOBAL},
  { &key_mts_gaq_LOCK, "key_mts_gaq_LOCK", 0},
  { &key_thd_timer_mutex, "thd_timer_mutex", 0},
#ifdef HAVE_REPLICATION
  { &key_commit_order_manager_mutex, "Commit_order_manager::m_mutex", 0},
  { &key_mutex_slave_worker_hash, "Relay_log_info::slave_worker_hash_lock", 0},
#endif
  { &key_LOCK_offline_mode, "LOCK_offline_mode", PSI_FLAG_GLOBAL},
  { &key_LOCK_default_password_lifetime, "LOCK_default_password_lifetime", PSI_FLAG_GLOBAL}
};

PSI_rwlock_key key_rwlock_LOCK_grant, key_rwlock_LOCK_logger,
  key_rwlock_LOCK_sys_init_connect, key_rwlock_LOCK_sys_init_slave,
  key_rwlock_LOCK_system_variables_hash, key_rwlock_query_cache_query_lock,
  key_rwlock_global_sid_lock, key_rwlock_LOCK_consistent_snapshot,
  key_rwlock_gtid_mode_lock,
  key_rwlock_channel_map_lock, key_rwlock_channel_lock;

PSI_rwlock_key key_rwlock_Trans_delegate_lock;
PSI_rwlock_key key_rwlock_Server_state_delegate_lock;
PSI_rwlock_key key_rwlock_Binlog_storage_delegate_lock;
#ifdef HAVE_REPLICATION
PSI_rwlock_key key_rwlock_Binlog_transmit_delegate_lock;
PSI_rwlock_key key_rwlock_Binlog_relay_IO_delegate_lock;
#endif

static PSI_rwlock_info all_server_rwlocks[]=
{
#ifdef HAVE_REPLICATION
  { &key_rwlock_Binlog_transmit_delegate_lock, "Binlog_transmit_delegate::lock", PSI_FLAG_GLOBAL},
  { &key_rwlock_Binlog_relay_IO_delegate_lock, "Binlog_relay_IO_delegate::lock", PSI_FLAG_GLOBAL},
#endif
  { &key_rwlock_LOCK_grant, "LOCK_grant", 0},
  { &key_rwlock_LOCK_logger, "LOGGER::LOCK_logger", 0},
  { &key_rwlock_LOCK_sys_init_connect, "LOCK_sys_init_connect", PSI_FLAG_GLOBAL},
  { &key_rwlock_LOCK_sys_init_slave, "LOCK_sys_init_slave", PSI_FLAG_GLOBAL},
  { &key_rwlock_LOCK_system_variables_hash, "LOCK_system_variables_hash", PSI_FLAG_GLOBAL},
  { &key_rwlock_query_cache_query_lock, "Query_cache_query::lock", 0},
  { &key_rwlock_global_sid_lock, "gtid_commit_rollback", PSI_FLAG_GLOBAL},
  { &key_rwlock_gtid_mode_lock, "gtid_mode_lock", PSI_FLAG_GLOBAL},
  { &key_rwlock_channel_map_lock, "channel_map_lock", 0},
  { &key_rwlock_channel_lock, "channel_lock", 0},
  { &key_rwlock_Trans_delegate_lock, "Trans_delegate::lock", PSI_FLAG_GLOBAL},
  { &key_rwlock_LOCK_consistent_snapshot, "LOCK_consistent_snapshot", PSI_FLAG_GLOBAL},
  { &key_rwlock_Server_state_delegate_lock, "Server_state_delegate::lock", PSI_FLAG_GLOBAL},
  { &key_rwlock_Binlog_storage_delegate_lock, "Binlog_storage_delegate::lock", PSI_FLAG_GLOBAL},
#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
  { &key_rwlock_LOCK_named_pipe_full_access_group, "LOCK_named_pipe_full_access_group", PSI_FLAG_GLOBAL},
#endif /* _WIN32 && !EMBEDDED_LIBRARY */
};

PSI_cond_key key_PAGE_cond, key_COND_active, key_COND_pool;
PSI_cond_key key_BINLOG_update_cond,
  key_COND_cache_status_changed, key_COND_manager,
  key_COND_server_started,
  key_item_func_sleep_cond, key_master_info_data_cond,
  key_master_info_start_cond, key_master_info_stop_cond,
  key_master_info_sleep_cond,
  key_relay_log_info_data_cond, key_relay_log_info_log_space_cond,
  key_relay_log_info_start_cond, key_relay_log_info_stop_cond,
  key_relay_log_info_sleep_cond, key_cond_slave_parallel_pend_jobs,
  key_cond_slave_parallel_worker, key_cond_mts_gaq,
  key_cond_mts_submode_logical_clock,
  key_TABLE_SHARE_cond, key_user_level_lock_cond;
PSI_cond_key key_RELAYLOG_update_cond;
PSI_cond_key key_BINLOG_COND_done;
PSI_cond_key key_RELAYLOG_COND_done;
PSI_cond_key key_BINLOG_prep_xids_cond;
PSI_cond_key key_RELAYLOG_prep_xids_cond;
PSI_cond_key key_gtid_ensure_index_cond;
PSI_cond_key key_COND_compress_gtid_table;
PSI_cond_key key_COND_thr_lock;
#ifdef HAVE_REPLICATION
PSI_cond_key key_commit_order_manager_cond;
PSI_cond_key key_cond_slave_worker_hash;
#endif

static PSI_cond_info all_server_conds[]=
{
  { &key_PAGE_cond, "PAGE::cond", 0},
  { &key_COND_active, "TC_LOG_MMAP::COND_active", 0},
  { &key_COND_pool, "TC_LOG_MMAP::COND_pool", 0},
  { &key_BINLOG_COND_done, "MYSQL_BIN_LOG::COND_done", 0},
  { &key_BINLOG_update_cond, "MYSQL_BIN_LOG::update_cond", 0},
  { &key_BINLOG_prep_xids_cond, "MYSQL_BIN_LOG::prep_xids_cond", 0},
  { &key_RELAYLOG_COND_done, "MYSQL_RELAY_LOG::COND_done", 0},
  { &key_RELAYLOG_update_cond, "MYSQL_RELAY_LOG::update_cond", 0},
  { &key_RELAYLOG_prep_xids_cond, "MYSQL_RELAY_LOG::prep_xids_cond", 0},
  { &key_COND_cache_status_changed, "Query_cache::COND_cache_status_changed", 0},
#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
  { &key_COND_handler_count, "COND_handler_count", PSI_FLAG_GLOBAL},
#endif
  { &key_COND_manager, "COND_manager", PSI_FLAG_GLOBAL},
  { &key_COND_server_started, "COND_server_started", PSI_FLAG_GLOBAL},
#if !defined(EMBEDDED_LIBRARY) && !defined(_WIN32)
  { &key_COND_socket_listener_active, "COND_socket_listener_active", PSI_FLAG_GLOBAL},
  { &key_COND_start_signal_handler, "COND_start_signal_handler", PSI_FLAG_GLOBAL},
#endif
  { &key_COND_thr_lock, "COND_thr_lock", 0 },
  { &key_item_func_sleep_cond, "Item_func_sleep::cond", 0},
  { &key_master_info_data_cond, "Master_info::data_cond", 0},
  { &key_master_info_start_cond, "Master_info::start_cond", 0},
  { &key_master_info_stop_cond, "Master_info::stop_cond", 0},
  { &key_master_info_sleep_cond, "Master_info::sleep_cond", 0},
  { &key_relay_log_info_data_cond, "Relay_log_info::data_cond", 0},
  { &key_relay_log_info_log_space_cond, "Relay_log_info::log_space_cond", 0},
  { &key_relay_log_info_start_cond, "Relay_log_info::start_cond", 0},
  { &key_relay_log_info_stop_cond, "Relay_log_info::stop_cond", 0},
  { &key_relay_log_info_sleep_cond, "Relay_log_info::sleep_cond", 0},
  { &key_cond_slave_parallel_pend_jobs, "Relay_log_info::pending_jobs_cond", 0},
  { &key_cond_slave_parallel_worker, "Worker_info::jobs_cond", 0},
  { &key_cond_mts_gaq, "Relay_log_info::mts_gaq_cond", 0},
  { &key_TABLE_SHARE_cond, "TABLE_SHARE::cond", 0},
  { &key_user_level_lock_cond, "User_level_lock::cond", 0},
  { &key_gtid_ensure_index_cond, "Gtid_state", PSI_FLAG_GLOBAL},
  { &key_COND_compress_gtid_table, "COND_compress_gtid_table", PSI_FLAG_GLOBAL}
#ifdef HAVE_REPLICATION
  ,
  { &key_commit_order_manager_cond, "Commit_order_manager::m_workers.cond", 0},
  { &key_cond_slave_worker_hash, "Relay_log_info::slave_worker_hash_lock", 0}
#endif
};

PSI_thread_key key_thread_bootstrap, key_thread_handle_manager, key_thread_main,
  key_thread_one_connection, key_thread_signal_hand,
  key_thread_compress_gtid_table, key_thread_parser_service;
PSI_thread_key key_thread_timer_notifier;

static PSI_thread_info all_server_threads[]=
{
#if defined (_WIN32) && !defined (EMBEDDED_LIBRARY)
  { &key_thread_handle_con_namedpipes, "con_named_pipes", PSI_FLAG_GLOBAL},
  { &key_thread_handle_con_sharedmem, "con_shared_mem", PSI_FLAG_GLOBAL},
  { &key_thread_handle_con_sockets, "con_sockets", PSI_FLAG_GLOBAL},
  { &key_thread_handle_shutdown, "shutdown", PSI_FLAG_GLOBAL},
#endif /* _WIN32 && !EMBEDDED_LIBRARY */
  { &key_thread_timer_notifier, "thread_timer_notifier", PSI_FLAG_GLOBAL},
  { &key_thread_bootstrap, "bootstrap", PSI_FLAG_GLOBAL},
  { &key_thread_handle_manager, "manager", PSI_FLAG_GLOBAL},
  { &key_thread_main, "main", PSI_FLAG_GLOBAL},
  { &key_thread_one_connection, "one_connection", 0},
  { &key_thread_signal_hand, "signal_handler", PSI_FLAG_GLOBAL},
  { &key_thread_compress_gtid_table, "compress_gtid_table", PSI_FLAG_GLOBAL},
  { &key_thread_parser_service, "parser_service", PSI_FLAG_GLOBAL},
};

PSI_file_key key_file_map;
PSI_file_key key_file_binlog, key_file_binlog_cache,
  key_file_binlog_index, key_file_binlog_index_cache, key_file_casetest,
  key_file_dbopt, key_file_des_key_file, key_file_ERRMSG, key_select_to_file,
  key_file_fileparser, key_file_frm, key_file_global_ddl_log, key_file_load,
  key_file_loadfile, key_file_log_event_data, key_file_log_event_info,
  key_file_master_info, key_file_misc, key_file_partition_ddl_log,
  key_file_pid, key_file_relay_log_info, key_file_send_file, key_file_tclog,
  key_file_trg, key_file_trn, key_file_init;
PSI_file_key key_file_general_log, key_file_slow_log;
PSI_file_key key_file_relaylog, key_file_relaylog_cache, key_file_relaylog_index, key_file_relaylog_index_cache;

static PSI_file_info all_server_files[]=
{
  { &key_file_map, "map", 0},
  { &key_file_binlog, "binlog", 0},
  { &key_file_binlog_cache, "binlog_cache", 0},
  { &key_file_binlog_index, "binlog_index", 0},
  { &key_file_binlog_index_cache, "binlog_index_cache", 0},
  { &key_file_relaylog, "relaylog", 0},
  { &key_file_relaylog_cache, "relaylog_cache", 0},
  { &key_file_relaylog_index, "relaylog_index", 0},
  { &key_file_relaylog_index_cache, "relaylog_index_cache", 0},
  { &key_file_io_cache, "io_cache", 0},
  { &key_file_casetest, "casetest", 0},
  { &key_file_dbopt, "dbopt", 0},
  { &key_file_des_key_file, "des_key_file", 0},
  { &key_file_ERRMSG, "ERRMSG", 0},
  { &key_select_to_file, "select_to_file", 0},
  { &key_file_fileparser, "file_parser", 0},
  { &key_file_frm, "FRM", 0},
  { &key_file_global_ddl_log, "global_ddl_log", 0},
  { &key_file_load, "load", 0},
  { &key_file_loadfile, "LOAD_FILE", 0},
  { &key_file_log_event_data, "log_event_data", 0},
  { &key_file_log_event_info, "log_event_info", 0},
  { &key_file_master_info, "master_info", 0},
  { &key_file_misc, "misc", 0},
  { &key_file_partition_ddl_log, "partition_ddl_log", 0},
  { &key_file_pid, "pid", 0},
  { &key_file_general_log, "query_log", 0},
  { &key_file_relay_log_info, "relay_log_info", 0},
  { &key_file_send_file, "send_file", 0},
  { &key_file_slow_log, "slow_log", 0},
  { &key_file_tclog, "tclog", 0},
  { &key_file_trg, "trigger_name", 0},
  { &key_file_trn, "trigger", 0},
  { &key_file_init, "init", 0}
};
#endif /* HAVE_PSI_INTERFACE */

PSI_stage_info stage_after_create= { 0, "After create", 0};
PSI_stage_info stage_allocating_local_table= { 0, "allocating local table", 0};
PSI_stage_info stage_alter_inplace_prepare= { 0, "preparing for alter table", 0};
PSI_stage_info stage_alter_inplace= { 0, "altering table", 0};
PSI_stage_info stage_alter_inplace_commit= { 0, "committing alter table to storage engine", 0};
PSI_stage_info stage_changing_master= { 0, "Changing master", 0};
PSI_stage_info stage_checking_master_version= { 0, "Checking master version", 0};
PSI_stage_info stage_checking_permissions= { 0, "checking permissions", 0};
PSI_stage_info stage_checking_privileges_on_cached_query= { 0, "checking privileges on cached query", 0};
PSI_stage_info stage_checking_query_cache_for_query= { 0, "checking query cache for query", 0};
PSI_stage_info stage_cleaning_up= { 0, "cleaning up", 0};
PSI_stage_info stage_closing_tables= { 0, "closing tables", 0};
PSI_stage_info stage_compressing_gtid_table= { 0, "Compressing gtid_executed table", 0};
PSI_stage_info stage_connecting_to_master= { 0, "Connecting to master", 0};
PSI_stage_info stage_converting_heap_to_ondisk= { 0, "converting HEAP to ondisk", 0};
PSI_stage_info stage_copying_to_group_table= { 0, "Copying to group table", 0};
PSI_stage_info stage_copying_to_tmp_table= { 0, "Copying to tmp table", 0};
PSI_stage_info stage_copy_to_tmp_table= { 0, "copy to tmp table", PSI_FLAG_STAGE_PROGRESS};
PSI_stage_info stage_creating_sort_index= { 0, "Creating sort index", 0};
PSI_stage_info stage_creating_table= { 0, "creating table", 0};
PSI_stage_info stage_creating_tmp_table= { 0, "Creating tmp table", 0};
PSI_stage_info stage_deleting_from_main_table= { 0, "deleting from main table", 0};
PSI_stage_info stage_deleting_from_reference_tables= { 0, "deleting from reference tables", 0};
PSI_stage_info stage_discard_or_import_tablespace= { 0, "discard_or_import_tablespace", 0};
PSI_stage_info stage_end= { 0, "end", 0};
PSI_stage_info stage_executing= { 0, "executing", 0};
PSI_stage_info stage_execution_of_init_command= { 0, "Execution of init_command", 0};
PSI_stage_info stage_explaining= { 0, "explaining", 0};
PSI_stage_info stage_finished_reading_one_binlog_switching_to_next_binlog= { 0, "Finished reading one binlog; switching to next binlog", 0};
PSI_stage_info stage_flushing_relay_log_and_master_info_repository= { 0, "Flushing relay log and master info repository.", 0};
PSI_stage_info stage_flushing_relay_log_info_file= { 0, "Flushing relay-log info file.", 0};
PSI_stage_info stage_freeing_items= { 0, "freeing items", 0};
PSI_stage_info stage_fulltext_initialization= { 0, "FULLTEXT initialization", 0};
PSI_stage_info stage_got_handler_lock= { 0, "got handler lock", 0};
PSI_stage_info stage_got_old_table= { 0, "got old table", 0};
PSI_stage_info stage_init= { 0, "init", 0};
PSI_stage_info stage_insert= { 0, "insert", 0};
PSI_stage_info stage_invalidating_query_cache_entries_table= { 0, "invalidating query cache entries (table)", 0};
PSI_stage_info stage_invalidating_query_cache_entries_table_list= { 0, "invalidating query cache entries (table list)", 0};
PSI_stage_info stage_killing_slave= { 0, "Killing slave", 0};
PSI_stage_info stage_logging_slow_query= { 0, "logging slow query", 0};
PSI_stage_info stage_making_temp_file_append_before_load_data= { 0, "Making temporary file (append) before replaying LOAD DATA INFILE", 0};
PSI_stage_info stage_making_temp_file_create_before_load_data= { 0, "Making temporary file (create) before replaying LOAD DATA INFILE", 0};
PSI_stage_info stage_manage_keys= { 0, "manage keys", 0};
PSI_stage_info stage_master_has_sent_all_binlog_to_slave= { 0, "Master has sent all binlog to slave; waiting for more updates", 0};
PSI_stage_info stage_opening_tables= { 0, "Opening tables", 0};
PSI_stage_info stage_optimizing= { 0, "optimizing", 0};
PSI_stage_info stage_preparing= { 0, "preparing", 0};
PSI_stage_info stage_purging_old_relay_logs= { 0, "Purging old relay logs", 0};
PSI_stage_info stage_query_end= { 0, "query end", 0};
PSI_stage_info stage_queueing_master_event_to_the_relay_log= { 0, "Queueing master event to the relay log", 0};
PSI_stage_info stage_reading_event_from_the_relay_log= { 0, "Reading event from the relay log", 0};
PSI_stage_info stage_registering_slave_on_master= { 0, "Registering slave on master", 0};
PSI_stage_info stage_removing_duplicates= { 0, "Removing duplicates", 0};
PSI_stage_info stage_removing_tmp_table= { 0, "removing tmp table", 0};
PSI_stage_info stage_rename= { 0, "rename", 0};
PSI_stage_info stage_rename_result_table= { 0, "rename result table", 0};
PSI_stage_info stage_requesting_binlog_dump= { 0, "Requesting binlog dump", 0};
PSI_stage_info stage_reschedule= { 0, "reschedule", 0};
PSI_stage_info stage_searching_rows_for_update= { 0, "Searching rows for update", 0};
PSI_stage_info stage_sending_binlog_event_to_slave= { 0, "Sending binlog event to slave", 0};
PSI_stage_info stage_sending_cached_result_to_client= { 0, "sending cached result to client", 0};
PSI_stage_info stage_sending_data= { 0, "Sending data", 0};
PSI_stage_info stage_setup= { 0, "setup", 0};
PSI_stage_info stage_slave_has_read_all_relay_log= { 0, "Slave has read all relay log; waiting for more updates", 0};
PSI_stage_info stage_slave_waiting_event_from_coordinator= { 0, "Waiting for an event from Coordinator", 0};
PSI_stage_info stage_slave_waiting_for_workers_to_process_queue= { 0, "Waiting for slave workers to process their queues", 0};
PSI_stage_info stage_slave_waiting_worker_queue= { 0, "Waiting for Slave Worker queue", 0};
PSI_stage_info stage_slave_waiting_worker_to_free_events= { 0, "Waiting for Slave Workers to free pending events", 0};
PSI_stage_info stage_slave_waiting_worker_to_release_partition= { 0, "Waiting for Slave Worker to release partition", 0};
PSI_stage_info stage_slave_waiting_workers_to_exit= { 0, "Waiting for workers to exit", 0};
PSI_stage_info stage_sorting_for_group= { 0, "Sorting for group", 0};
PSI_stage_info stage_sorting_for_order= { 0, "Sorting for order", 0};
PSI_stage_info stage_sorting_result= { 0, "Sorting result", 0};
PSI_stage_info stage_statistics= { 0, "statistics", 0};
PSI_stage_info stage_sql_thd_waiting_until_delay= { 0, "Waiting until MASTER_DELAY seconds after master executed event", 0 };
PSI_stage_info stage_storing_result_in_query_cache= { 0, "storing result in query cache", 0};
PSI_stage_info stage_storing_row_into_queue= { 0, "storing row into queue", 0};
PSI_stage_info stage_system_lock= { 0, "System lock", 0};
PSI_stage_info stage_update= { 0, "update", 0};
PSI_stage_info stage_updating= { 0, "updating", 0};
PSI_stage_info stage_updating_main_table= { 0, "updating main table", 0};
PSI_stage_info stage_updating_reference_tables= { 0, "updating reference tables", 0};
PSI_stage_info stage_upgrading_lock= { 0, "upgrading lock", 0};
PSI_stage_info stage_user_sleep= { 0, "User sleep", 0};
PSI_stage_info stage_verifying_table= { 0, "verifying table", 0};
PSI_stage_info stage_waiting_for_gtid_to_be_committed= { 0, "Waiting for GTID to be committed", 0};
PSI_stage_info stage_waiting_for_handler_insert= { 0, "waiting for handler insert", 0};
PSI_stage_info stage_waiting_for_handler_lock= { 0, "waiting for handler lock", 0};
PSI_stage_info stage_waiting_for_handler_open= { 0, "waiting for handler open", 0};
PSI_stage_info stage_waiting_for_insert= { 0, "Waiting for INSERT", 0};
PSI_stage_info stage_waiting_for_master_to_send_event= { 0, "Waiting for master to send event", 0};
PSI_stage_info stage_waiting_for_master_update= { 0, "Waiting for master update", 0};
PSI_stage_info stage_waiting_for_relay_log_space= { 0, "Waiting for the slave SQL thread to free enough relay log space", 0};
PSI_stage_info stage_waiting_for_slave_mutex_on_exit= { 0, "Waiting for slave mutex on exit", 0};
PSI_stage_info stage_waiting_for_slave_thread_to_start= { 0, "Waiting for slave thread to start", 0};
PSI_stage_info stage_waiting_for_table_flush= { 0, "Waiting for table flush", 0};
PSI_stage_info stage_waiting_for_query_cache_lock= { 0, "Waiting for query cache lock", 0};
PSI_stage_info stage_waiting_for_the_next_event_in_relay_log= { 0, "Waiting for the next event in relay log", 0};
PSI_stage_info stage_waiting_for_the_slave_thread_to_advance_position= { 0, "Waiting for the slave SQL thread to advance position", 0};
PSI_stage_info stage_waiting_to_finalize_termination= { 0, "Waiting to finalize termination", 0};
PSI_stage_info stage_worker_waiting_for_its_turn_to_commit= { 0, "Waiting for preceding transaction to commit", 0};
PSI_stage_info stage_worker_waiting_for_commit_parent= { 0, "Waiting for dependent transaction to commit", 0};
PSI_stage_info stage_suspending= { 0, "Suspending", 0};
PSI_stage_info stage_starting= { 0, "starting", 0};
PSI_stage_info stage_waiting_for_no_channel_reference= { 0, "Waiting for no channel reference.", 0};
PSI_stage_info stage_restoring_secondary_keys= { 0, "restoring secondary keys", 0};

#ifdef HAVE_PSI_INTERFACE

PSI_stage_info *all_server_stages[]=
{
  & stage_after_create,
  & stage_allocating_local_table,
  & stage_alter_inplace_prepare,
  & stage_alter_inplace,
  & stage_alter_inplace_commit,
  & stage_changing_master,
  & stage_checking_master_version,
  & stage_checking_permissions,
  & stage_checking_privileges_on_cached_query,
  & stage_checking_query_cache_for_query,
  & stage_cleaning_up,
  & stage_closing_tables,
  & stage_compressing_gtid_table,
  & stage_connecting_to_master,
  & stage_converting_heap_to_ondisk,
  & stage_copying_to_group_table,
  & stage_copying_to_tmp_table,
  & stage_copy_to_tmp_table,
  & stage_creating_sort_index,
  & stage_creating_table,
  & stage_creating_tmp_table,
  & stage_deleting_from_main_table,
  & stage_deleting_from_reference_tables,
  & stage_discard_or_import_tablespace,
  & stage_end,
  & stage_executing,
  & stage_execution_of_init_command,
  & stage_explaining,
  & stage_finished_reading_one_binlog_switching_to_next_binlog,
  & stage_flushing_relay_log_and_master_info_repository,
  & stage_flushing_relay_log_info_file,
  & stage_freeing_items,
  & stage_fulltext_initialization,
  & stage_got_handler_lock,
  & stage_got_old_table,
  & stage_init,
  & stage_insert,
  & stage_invalidating_query_cache_entries_table,
  & stage_invalidating_query_cache_entries_table_list,
  & stage_killing_slave,
  & stage_logging_slow_query,
  & stage_making_temp_file_append_before_load_data,
  & stage_making_temp_file_create_before_load_data,
  & stage_manage_keys,
  & stage_master_has_sent_all_binlog_to_slave,
  & stage_opening_tables,
  & stage_optimizing,
  & stage_preparing,
  & stage_purging_old_relay_logs,
  & stage_query_end,
  & stage_queueing_master_event_to_the_relay_log,
  & stage_reading_event_from_the_relay_log,
  & stage_registering_slave_on_master,
  & stage_removing_duplicates,
  & stage_removing_tmp_table,
  & stage_rename,
  & stage_rename_result_table,
  & stage_requesting_binlog_dump,
  & stage_reschedule,
  & stage_searching_rows_for_update,
  & stage_sending_binlog_event_to_slave,
  & stage_sending_cached_result_to_client,
  & stage_sending_data,
  & stage_setup,
  & stage_slave_has_read_all_relay_log,
  & stage_slave_waiting_event_from_coordinator,
  & stage_slave_waiting_for_workers_to_process_queue,
  & stage_slave_waiting_worker_queue,
  & stage_slave_waiting_worker_to_free_events,
  & stage_slave_waiting_worker_to_release_partition,
  & stage_slave_waiting_workers_to_exit,
  & stage_sorting_for_group,
  & stage_sorting_for_order,
  & stage_sorting_result,
  & stage_sql_thd_waiting_until_delay,
  & stage_statistics,
  & stage_storing_result_in_query_cache,
  & stage_storing_row_into_queue,
  & stage_system_lock,
  & stage_update,
  & stage_updating,
  & stage_updating_main_table,
  & stage_updating_reference_tables,
  & stage_upgrading_lock,
  & stage_user_sleep,
  & stage_verifying_table,
  & stage_waiting_for_gtid_to_be_committed,
  & stage_waiting_for_handler_insert,
  & stage_waiting_for_handler_lock,
  & stage_waiting_for_handler_open,
  & stage_waiting_for_insert,
  & stage_waiting_for_master_to_send_event,
  & stage_waiting_for_master_update,
  & stage_waiting_for_relay_log_space,
  & stage_waiting_for_slave_mutex_on_exit,
  & stage_waiting_for_slave_thread_to_start,
  & stage_waiting_for_table_flush,
  & stage_waiting_for_query_cache_lock,
  & stage_waiting_for_the_next_event_in_relay_log,
  & stage_waiting_for_the_slave_thread_to_advance_position,
  & stage_waiting_to_finalize_termination,
  & stage_worker_waiting_for_its_turn_to_commit,
  & stage_worker_waiting_for_commit_parent,
  & stage_suspending,
  & stage_starting,
  & stage_waiting_for_no_channel_reference,
  & stage_restoring_secondary_keys
};

PSI_socket_key key_socket_tcpip, key_socket_unix, key_socket_client_connection;

static PSI_socket_info all_server_sockets[]=
{
  { &key_socket_tcpip, "server_tcpip_socket", PSI_FLAG_GLOBAL},
  { &key_socket_unix, "server_unix_socket", PSI_FLAG_GLOBAL},
  { &key_socket_client_connection, "client_connection", 0}
};
#endif /* HAVE_PSI_INTERFACE */

PSI_memory_key key_memory_locked_table_list;
PSI_memory_key key_memory_locked_thread_list;
PSI_memory_key key_memory_thd_transactions;
PSI_memory_key key_memory_delegate;
PSI_memory_key key_memory_acl_mem;
PSI_memory_key key_memory_acl_memex;
PSI_memory_key key_memory_acl_cache;
PSI_memory_key key_memory_thd_main_mem_root;
PSI_memory_key key_memory_help;
PSI_memory_key key_memory_new_frm_mem;
PSI_memory_key key_memory_table_share;
PSI_memory_key key_memory_gdl;
PSI_memory_key key_memory_table_triggers_list;
PSI_memory_key key_memory_servers;
PSI_memory_key key_memory_prepared_statement_map;
PSI_memory_key key_memory_prepared_statement_main_mem_root;
PSI_memory_key key_memory_protocol_rset_root;
PSI_memory_key key_memory_warning_info_warn_root;
PSI_memory_key key_memory_sp_cache;
PSI_memory_key key_memory_sp_head_main_root;
PSI_memory_key key_memory_sp_head_execute_root;
PSI_memory_key key_memory_sp_head_call_root;
PSI_memory_key key_memory_table_mapping_root;
PSI_memory_key key_memory_quick_range_select_root;
PSI_memory_key key_memory_quick_index_merge_root;
PSI_memory_key key_memory_quick_ror_intersect_select_root;
PSI_memory_key key_memory_quick_ror_union_select_root;
PSI_memory_key key_memory_quick_group_min_max_select_root;
PSI_memory_key key_memory_test_quick_select_exec;
PSI_memory_key key_memory_prune_partitions_exec;
PSI_memory_key key_memory_binlog_recover_exec;
PSI_memory_key key_memory_blob_mem_storage;
PSI_memory_key key_memory_NAMED_ILINK_name;
PSI_memory_key key_memory_Sys_var_charptr_value;
PSI_memory_key key_memory_queue_item;
PSI_memory_key key_memory_THD_db;
PSI_memory_key key_memory_user_var_entry;
PSI_memory_key key_memory_Slave_job_group_group_relay_log_name;
PSI_memory_key key_memory_Relay_log_info_group_relay_log_name;
PSI_memory_key key_memory_binlog_cache_mngr;
PSI_memory_key key_memory_Row_data_memory_memory;
PSI_memory_key key_memory_Gtid_state_to_string;
PSI_memory_key key_memory_Owned_gtids_to_string;
PSI_memory_key key_memory_Sort_param_tmp_buffer;
PSI_memory_key key_memory_Filesort_info_merge;
PSI_memory_key key_memory_Filesort_info_record_pointers;
PSI_memory_key key_memory_handler_errmsgs;
PSI_memory_key key_memory_handlerton;
PSI_memory_key key_memory_XID;
PSI_memory_key key_memory_host_cache_hostname;
PSI_memory_key key_memory_user_var_entry_value;
PSI_memory_key key_memory_User_level_lock;
PSI_memory_key key_memory_MYSQL_LOG_name;
PSI_memory_key key_memory_TC_LOG_MMAP_pages;
PSI_memory_key key_memory_my_bitmap_map;
PSI_memory_key key_memory_QUICK_RANGE_SELECT_mrr_buf_desc;
PSI_memory_key key_memory_Event_queue_element_for_exec_names;
PSI_memory_key key_memory_my_str_malloc;
PSI_memory_key key_memory_MYSQL_BIN_LOG_basename;
PSI_memory_key key_memory_MYSQL_BIN_LOG_index;
PSI_memory_key key_memory_MYSQL_RELAY_LOG_basename;
PSI_memory_key key_memory_MYSQL_RELAY_LOG_index;
PSI_memory_key key_memory_rpl_filter;
PSI_memory_key key_memory_errmsgs;
PSI_memory_key key_memory_Gis_read_stream_err_msg;
PSI_memory_key key_memory_Geometry_objects_data;
PSI_memory_key key_memory_MYSQL_LOCK;
PSI_memory_key key_memory_Event_scheduler_scheduler_param;
PSI_memory_key key_memory_Owned_gtids_sidno_to_hash;
PSI_memory_key key_memory_Mutex_cond_array_Mutex_cond;
PSI_memory_key key_memory_TABLE_RULE_ENT;
PSI_memory_key key_memory_Rpl_info_table;
PSI_memory_key key_memory_Rpl_info_file_buffer;
PSI_memory_key key_memory_db_worker_hash_entry;
PSI_memory_key key_memory_rpl_slave_check_temp_dir;
PSI_memory_key key_memory_rpl_slave_command_buffer;
PSI_memory_key key_memory_binlog_ver_1_event;
PSI_memory_key key_memory_SLAVE_INFO;
PSI_memory_key key_memory_binlog_pos;
PSI_memory_key key_memory_HASH_ROW_ENTRY;
PSI_memory_key key_memory_binlog_statement_buffer;
PSI_memory_key key_memory_partition_syntax_buffer;
PSI_memory_key key_memory_READ_INFO;
PSI_memory_key key_memory_JOIN_CACHE;
PSI_memory_key key_memory_TABLE_sort_io_cache;
PSI_memory_key key_memory_frm;
PSI_memory_key key_memory_Unique_sort_buffer;
PSI_memory_key key_memory_Unique_merge_buffer;
PSI_memory_key key_memory_TABLE;
PSI_memory_key key_memory_frm_extra_segment_buff;
PSI_memory_key key_memory_frm_form_pos;
PSI_memory_key key_memory_frm_string;
PSI_memory_key key_memory_LOG_name;
PSI_memory_key key_memory_DATE_TIME_FORMAT;
PSI_memory_key key_memory_DDL_LOG_MEMORY_ENTRY;
PSI_memory_key key_memory_ST_SCHEMA_TABLE;
PSI_memory_key key_memory_ignored_db;
PSI_memory_key key_memory_PROFILE;
PSI_memory_key key_memory_st_mysql_plugin_dl;
PSI_memory_key key_memory_st_mysql_plugin;
PSI_memory_key key_memory_global_system_variables;
PSI_memory_key key_memory_THD_variables;
PSI_memory_key key_memory_Security_context;
PSI_memory_key key_memory_shared_memory_name;
PSI_memory_key key_memory_bison_stack;
PSI_memory_key key_memory_THD_handler_tables_hash;
PSI_memory_key key_memory_hash_index_key_buffer;
PSI_memory_key key_memory_dboptions_hash;
PSI_memory_key key_memory_user_conn;
PSI_memory_key key_memory_LOG_POS_COORD;
PSI_memory_key key_memory_XID_STATE;
PSI_memory_key key_memory_MPVIO_EXT_auth_info;
PSI_memory_key key_memory_opt_bin_logname;
PSI_memory_key key_memory_Query_cache;
PSI_memory_key key_memory_READ_RECORD_cache;
PSI_memory_key key_memory_Quick_ranges;
PSI_memory_key key_memory_File_query_log_name;
PSI_memory_key key_memory_Table_trigger_dispatcher;
PSI_memory_key key_memory_show_slave_status_io_gtid_set;
PSI_memory_key key_memory_write_set_extraction;
PSI_memory_key key_memory_thd_timer;
PSI_memory_key key_memory_THD_Session_tracker;
PSI_memory_key key_memory_THD_Session_sysvar_resource_manager;
PSI_memory_key key_memory_get_all_tables;
PSI_memory_key key_memory_fill_schema_schemata;
PSI_memory_key key_memory_native_functions;
PSI_memory_key key_memory_JSON;

PSI_memory_key key_memory_userstat_table_stats;
PSI_memory_key key_memory_userstat_index_stats;
PSI_memory_key key_memory_userstat_user_stats;
PSI_memory_key key_memory_userstat_thread_stats;
PSI_memory_key key_memory_userstat_client_stats;

PSI_memory_key key_memory_thread_pool_connection;

#ifdef HAVE_PSI_INTERFACE
static PSI_memory_info all_server_memory[]=
{
  { &key_memory_locked_table_list, "Locked_tables_list::m_locked_tables_root", 0},
  { &key_memory_locked_thread_list, "display_table_locks", PSI_FLAG_THREAD},
  { &key_memory_thd_transactions, "THD::transactions::mem_root", PSI_FLAG_THREAD},
  { &key_memory_delegate, "Delegate::memroot", 0},
  { &key_memory_acl_mem, "sql_acl_mem", PSI_FLAG_GLOBAL},
  { &key_memory_acl_memex, "sql_acl_memex", PSI_FLAG_GLOBAL},
  { &key_memory_acl_cache, "acl_cache", PSI_FLAG_GLOBAL},
  { &key_memory_thd_main_mem_root, "thd::main_mem_root", PSI_FLAG_THREAD},
  { &key_memory_help, "help", 0},
  { &key_memory_new_frm_mem, "new_frm_mem", 0},
  { &key_memory_table_share, "TABLE_SHARE::mem_root", PSI_FLAG_GLOBAL}, /* table definition cache */
  { &key_memory_gdl, "gdl", 0},
  { &key_memory_table_triggers_list, "Table_triggers_list", 0},
  { &key_memory_servers, "servers", 0},
  { &key_memory_prepared_statement_map, "Prepared_statement_map", PSI_FLAG_THREAD},
  { &key_memory_prepared_statement_main_mem_root, "Prepared_statement::main_mem_root", PSI_FLAG_THREAD},
  { &key_memory_protocol_rset_root, "Protocol_local::m_rset_root", PSI_FLAG_THREAD},
  { &key_memory_warning_info_warn_root, "Warning_info::m_warn_root", PSI_FLAG_THREAD},
  { &key_memory_sp_cache, "THD::sp_cache", 0},
  { &key_memory_sp_head_main_root, "sp_head::main_mem_root", 0},
  { &key_memory_sp_head_execute_root, "sp_head::execute_mem_root", PSI_FLAG_THREAD},
  { &key_memory_sp_head_call_root, "sp_head::call_mem_root", PSI_FLAG_THREAD},
  { &key_memory_table_mapping_root, "table_mapping::m_mem_root", 0},
  { &key_memory_quick_range_select_root, "QUICK_RANGE_SELECT::alloc", PSI_FLAG_THREAD},
  { &key_memory_quick_index_merge_root, "QUICK_INDEX_MERGE_SELECT::alloc", PSI_FLAG_THREAD},
  { &key_memory_quick_ror_intersect_select_root, "QUICK_ROR_INTERSECT_SELECT::alloc", PSI_FLAG_THREAD},
  { &key_memory_quick_ror_union_select_root, "QUICK_ROR_UNION_SELECT::alloc", PSI_FLAG_THREAD},
  { &key_memory_quick_group_min_max_select_root, "QUICK_GROUP_MIN_MAX_SELECT::alloc", PSI_FLAG_THREAD},
  { &key_memory_test_quick_select_exec, "test_quick_select", PSI_FLAG_THREAD},
  { &key_memory_prune_partitions_exec, "prune_partitions::exec", 0},
  { &key_memory_binlog_recover_exec, "MYSQL_BIN_LOG::recover", 0},
  { &key_memory_blob_mem_storage, "Blob_mem_storage::storage", 0},

  { &key_memory_NAMED_ILINK_name, "NAMED_ILINK::name", 0},
  { &key_memory_String_value, "String::value", 0},
  { &key_memory_Sys_var_charptr_value, "Sys_var_charptr::value", 0},
  { &key_memory_queue_item, "Queue::queue_item", 0},
  { &key_memory_THD_db, "THD::db", 0},
  { &key_memory_user_var_entry, "user_var_entry", 0},
  { &key_memory_Slave_job_group_group_relay_log_name, "Slave_job_group::group_relay_log_name", 0},
  { &key_memory_Relay_log_info_group_relay_log_name, "Relay_log_info::group_relay_log_name", 0},
  { &key_memory_binlog_cache_mngr, "binlog_cache_mngr", 0},
  { &key_memory_Row_data_memory_memory, "Row_data_memory::memory", 0},

  { &key_memory_Gtid_set_to_string, "Gtid_set::to_string", 0},
  { &key_memory_Gtid_state_to_string, "Gtid_state::to_string", 0},
  { &key_memory_Owned_gtids_to_string, "Owned_gtids::to_string", 0},
  { &key_memory_log_event, "Log_event", 0},
  { &key_memory_Incident_log_event_message, "Incident_log_event::message", 0},
  { &key_memory_Rows_query_log_event_rows_query, "Rows_query_log_event::rows_query", 0},

  { &key_memory_userstat_table_stats, "userstat_table_stats", 0},
  { &key_memory_userstat_index_stats, "userstat_index_stats", 0},
  { &key_memory_userstat_user_stats, "userstat_user_stats", 0},
  { &key_memory_userstat_thread_stats, "userstat_thread_stats", 0},
  { &key_memory_userstat_client_stats, "userstat_client_stats", 0},

  { &key_memory_thread_pool_connection, "thread_pool_connection", 0},

  { &key_memory_Sort_param_tmp_buffer, "Sort_param::tmp_buffer", 0},
  { &key_memory_Filesort_info_merge, "Filesort_info::merge", 0},
  { &key_memory_Filesort_info_record_pointers, "Filesort_info::record_pointers", 0},
  { &key_memory_Filesort_buffer_sort_keys, "Filesort_buffer::sort_keys", 0},
  { &key_memory_handler_errmsgs, "handler::errmsgs", 0},
  { &key_memory_handlerton, "handlerton", 0},
  { &key_memory_XID, "XID", 0},
  { &key_memory_host_cache_hostname, "host_cache::hostname", 0},
  { &key_memory_user_var_entry_value, "user_var_entry::value", 0},
  { &key_memory_User_level_lock, "User_level_lock", 0},
  { &key_memory_MYSQL_LOG_name, "MYSQL_LOG::name", 0},
  { &key_memory_TC_LOG_MMAP_pages, "TC_LOG_MMAP::pages", 0},
  { &key_memory_my_bitmap_map, "my_bitmap_map", 0},
  { &key_memory_QUICK_RANGE_SELECT_mrr_buf_desc, "QUICK_RANGE_SELECT::mrr_buf_desc", 0},
  { &key_memory_Event_queue_element_for_exec_names, "Event_queue_element_for_exec::names", 0},
  { &key_memory_my_str_malloc, "my_str_malloc", 0},
  { &key_memory_MYSQL_BIN_LOG_basename, "MYSQL_BIN_LOG::basename", 0},
  { &key_memory_MYSQL_BIN_LOG_index, "MYSQL_BIN_LOG::index", 0},
  { &key_memory_MYSQL_RELAY_LOG_basename, "MYSQL_RELAY_LOG::basename", 0},
  { &key_memory_MYSQL_RELAY_LOG_index, "MYSQL_RELAY_LOG::index", 0},
  { &key_memory_rpl_filter, "rpl_filter memory", 0},
  { &key_memory_errmsgs, "errmsgs", 0},
  { &key_memory_Gis_read_stream_err_msg, "Gis_read_stream::err_msg", 0},
  { &key_memory_Geometry_objects_data, "Geometry::ptr_and_wkb_data", 0},
  { &key_memory_MYSQL_LOCK, "MYSQL_LOCK", 0},
  { &key_memory_NET_buff, "NET::buff", 0},
  { &key_memory_NET_compress_packet, "NET::compress_packet", 0},
  { &key_memory_Event_scheduler_scheduler_param, "Event_scheduler::scheduler_param", 0},
  { &key_memory_Gtid_set_Interval_chunk, "Gtid_set::Interval_chunk", 0},
  { &key_memory_Owned_gtids_sidno_to_hash, "Owned_gtids::sidno_to_hash", 0},
  { &key_memory_Sid_map_Node, "Sid_map::Node", 0},
  { &key_memory_Gtid_state_group_commit_sidno, "Gtid_state::group_commit_sidno_locks", 0},
  { &key_memory_Mutex_cond_array_Mutex_cond, "Mutex_cond_array::Mutex_cond", 0},
  { &key_memory_TABLE_RULE_ENT, "TABLE_RULE_ENT", 0},

  { &key_memory_Rpl_info_table, "Rpl_info_table", 0},
  { &key_memory_Rpl_info_file_buffer, "Rpl_info_file::buffer", 0},
  { &key_memory_db_worker_hash_entry, "db_worker_hash_entry", 0},
  { &key_memory_rpl_slave_check_temp_dir, "rpl_slave::check_temp_dir", 0},
  { &key_memory_rpl_slave_command_buffer, "rpl_slave::command_buffer", 0},
  { &key_memory_binlog_ver_1_event, "binlog_ver_1_event", 0},
  { &key_memory_SLAVE_INFO, "SLAVE_INFO", 0},
  { &key_memory_binlog_pos, "binlog_pos", 0},
  { &key_memory_HASH_ROW_ENTRY, "HASH_ROW_ENTRY", 0},
  { &key_memory_binlog_statement_buffer, "binlog_statement_buffer", 0},
  { &key_memory_partition_syntax_buffer, "partition_syntax_buffer", 0},
  { &key_memory_READ_INFO, "READ_INFO", 0},
  { &key_memory_JOIN_CACHE, "JOIN_CACHE", 0},
  { &key_memory_TABLE_sort_io_cache, "TABLE::sort_io_cache", 0},
  { &key_memory_frm, "frm", 0},
  { &key_memory_Unique_sort_buffer, "Unique::sort_buffer", 0},
  { &key_memory_Unique_merge_buffer, "Unique::merge_buffer", 0},
  { &key_memory_TABLE, "TABLE", PSI_FLAG_GLOBAL}, /* Table cache */
  { &key_memory_frm_extra_segment_buff, "frm::extra_segment_buff", 0},
  { &key_memory_frm_form_pos, "frm::form_pos", 0},
  { &key_memory_frm_string, "frm::string", 0},
  { &key_memory_LOG_name, "LOG_name", 0},
  { &key_memory_DATE_TIME_FORMAT, "DATE_TIME_FORMAT", 0},
  { &key_memory_DDL_LOG_MEMORY_ENTRY, "DDL_LOG_MEMORY_ENTRY", 0},
  { &key_memory_ST_SCHEMA_TABLE, "ST_SCHEMA_TABLE", 0},
  { &key_memory_ignored_db, "ignored_db", 0},
  { &key_memory_PROFILE, "PROFILE", 0},
  { &key_memory_global_system_variables, "global_system_variables", 0},
  { &key_memory_THD_variables, "THD::variables", 0},
  { &key_memory_Security_context, "Security_context", 0},
  { &key_memory_shared_memory_name, "Shared_memory_name", 0},
  { &key_memory_bison_stack, "bison_stack", 0},
  { &key_memory_THD_handler_tables_hash, "THD::handler_tables_hash", 0},
  { &key_memory_hash_index_key_buffer, "hash_index_key_buffer", 0},
  { &key_memory_dboptions_hash, "dboptions_hash", 0},
  { &key_memory_user_conn, "user_conn", 0},
  { &key_memory_LOG_POS_COORD, "LOG_POS_COORD", 0},
  { &key_memory_XID_STATE, "XID_STATE", 0},
  { &key_memory_MPVIO_EXT_auth_info, "MPVIO_EXT::auth_info", 0},
  { &key_memory_opt_bin_logname, "opt_bin_logname", 0},
  { &key_memory_Query_cache, "Query_cache", PSI_FLAG_GLOBAL},
  { &key_memory_READ_RECORD_cache, "READ_RECORD_cache", 0},
  { &key_memory_Quick_ranges, "Quick_ranges", 0},
  { &key_memory_File_query_log_name, "File_query_log::name", 0},
  { &key_memory_Table_trigger_dispatcher, "Table_trigger_dispatcher::m_mem_root", 0},
  { &key_memory_thd_timer, "thd_timer", 0},
  { &key_memory_THD_Session_tracker, "THD::Session_tracker", 0},
  { &key_memory_THD_Session_sysvar_resource_manager, "THD::Session_sysvar_resource_manager", 0},
  { &key_memory_show_slave_status_io_gtid_set, "show_slave_status_io_gtid_set", 0},
  { &key_memory_write_set_extraction, "write_set_extraction", 0},
  { &key_memory_get_all_tables, "get_all_tables", 0},
  { &key_memory_fill_schema_schemata, "fill_schema_schemata", 0},
  { &key_memory_native_functions, "native_functions", PSI_FLAG_GLOBAL},
  { &key_memory_JSON, "JSON", 0 },
};

/* TODO: find a good header */
extern "C" void init_client_psi_keys(void);

/**
  Initialise all the performance schema instrumentation points
  used by the server.
*/
void init_server_psi_keys(void)
{
  const char* category= "sql";
  int count;

  count= array_elements(all_server_mutexes);
  mysql_mutex_register(category, all_server_mutexes, count);

  count= array_elements(all_server_rwlocks);
  mysql_rwlock_register(category, all_server_rwlocks, count);

  count= array_elements(all_server_conds);
  mysql_cond_register(category, all_server_conds, count);

  count= array_elements(all_server_threads);
  mysql_thread_register(category, all_server_threads, count);

  count= array_elements(all_server_files);
  mysql_file_register(category, all_server_files, count);

  count= array_elements(all_server_stages);
  mysql_stage_register(category, all_server_stages, count);

  count= array_elements(all_server_sockets);
  mysql_socket_register(category, all_server_sockets, count);

  count= array_elements(all_server_memory);
  mysql_memory_register(category, all_server_memory, count);

#ifdef HAVE_PSI_STATEMENT_INTERFACE
  init_sql_statement_info();
  count= array_elements(sql_statement_info);
  mysql_statement_register(category, sql_statement_info, count);

  init_sp_psi_keys();

  init_scheduler_psi_keys();

  category= "com";
  init_com_statement_info();

  /*
    Register [0 .. COM_QUERY - 1] as "statement/com/..."
  */
  count= (int) COM_QUERY;
  mysql_statement_register(category, com_statement_info, count);

  /*
    Register [COM_QUERY + 1 .. COM_END] as "statement/com/..."
  */
  count= (int) COM_END - (int) COM_QUERY;
  mysql_statement_register(category, & com_statement_info[(int) COM_QUERY + 1], count);

  category= "abstract";
  /*
    Register [COM_QUERY] as "statement/abstract/com_query"
  */
  mysql_statement_register(category, & com_statement_info[(int) COM_QUERY], 1);

  /*
    When a new packet is received,
    it is instrumented as "statement/abstract/new_packet".
    Based on the packet type found, it later mutates to the
    proper narrow type, for example
    "statement/abstract/query" or "statement/com/ping".
    In cases of "statement/abstract/query", SQL queries are given to
    the parser, which mutates the statement type to an even more
    narrow classification, for example "statement/sql/select".
  */
  stmt_info_new_packet.m_key= 0;
  stmt_info_new_packet.m_name= "new_packet";
  stmt_info_new_packet.m_flags= PSI_FLAG_MUTABLE;
  mysql_statement_register(category, &stmt_info_new_packet, 1);

  /*
    Statements processed from the relay log are initially instrumented as
    "statement/abstract/relay_log". The parser will mutate the statement type to
    a more specific classification, for example "statement/sql/insert".
  */
  stmt_info_rpl.m_key= 0;
  stmt_info_rpl.m_name= "relay_log";
  stmt_info_rpl.m_flags= PSI_FLAG_MUTABLE;
  mysql_statement_register(category, &stmt_info_rpl, 1);
#endif

  /* Common client and server code. */
  init_client_psi_keys();
  /* Vio */
  init_vio_psi_keys();
}

#endif /* HAVE_PSI_INTERFACE */

#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
// update_named_pipe_full_access_group returns false on success, true on failure
bool update_named_pipe_full_access_group(const char *new_group_name)
{
  if (named_pipe_acceptor) {
    return named_pipe_listener->update_named_pipe_full_access_group(
      new_group_name);
  }
  return true;
}

#endif  /* _WIN32 && !EMBEDDED_LIBRARY */


void set_mysqld_opt_tracking_mode()
{
  my_atomic_store64(&mysql_bin_log.m_dependency_tracker.m_opt_tracking_mode,
          static_cast<int64>(mysql_bin_log.m_dependency_tracker.m_opt_tracking_mode_value));
}