1 /* 2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_UTILITIES_VMERROR_HPP 26 #define SHARE_UTILITIES_VMERROR_HPP 27 28 #include "utilities/globalDefinitions.hpp" 29 30 class Decoder; 31 class frame; 32 class VM_ReportJavaOutOfMemory; 33 34 class VMError : public AllStatic { 35 friend class VMStructs; 36 37 static int _id; // Solaris/Linux signals: 0 - SIGRTMAX 38 // Windows exceptions: 0xCxxxxxxx system errors 39 // 0x8xxxxxxx system warnings 40 41 static const char* _message; 42 static char _detail_msg[1024]; 43 44 static Thread* _thread; // NULL if it's native thread 45 46 // additional info for crashes 47 static address _pc; // faulting PC 48 static void* _siginfo; // ExceptionRecord on Windows, 49 // siginfo_t on Solaris/Linux 50 static void* _context; // ContextRecord on Windows, 51 // ucontext_t on Solaris/Linux 52 53 // additional info for VM internal errors 54 static const char* _filename; 55 static int _lineno; 56 57 // used by reporting about OOM 58 static size_t _size; 59 60 // used by fatal error handler 61 static int _current_step; 62 static const char* _current_step_info; 63 64 // Thread id of the first error. We must be able to handle native thread, 65 // so use thread id instead of Thread* to identify thread. 66 static volatile intptr_t _first_error_tid; 67 68 // Core dump status, false if we have been unable to write a core/minidump for some reason 69 static bool coredump_status; 70 71 // When coredump_status is set to true this will contain the name/path to the core/minidump, 72 // if coredump_status if false, this will (hopefully) contain a useful error explaining why 73 // no core/minidump has been written to disk 74 static char coredump_message[O_BUFLEN]; 75 76 // Timeout handling: 77 // Timestamp at which error reporting started; -1 if no error reporting in progress. 78 static volatile jlong _reporting_start_time; 79 // Whether or not error reporting did timeout. 80 static volatile bool _reporting_did_timeout; 81 // Timestamp at which the last error reporting step started; -1 if no error reporting 82 // in progress. 83 static volatile jlong _step_start_time; 84 // Whether or not the last error reporting step did timeout. 85 static volatile bool _step_did_timeout; 86 87 static bool _error_reported; 88 89 public: 90 91 // set signal handlers on Solaris/Linux or the default exception filter 92 // on Windows, to handle recursive crashes. 93 static void reset_signal_handlers(); 94 95 // handle -XX:+ShowMessageBoxOnError. buf is used to format the message string 96 static void show_message_box(char* buf, int buflen); 97 98 // generate an error report 99 static void report(outputStream* st, bool verbose); 100 101 // generate a stack trace 102 static void print_stack_trace(outputStream* st, JavaThread* jt, 103 char* buf, int buflen, bool verbose = false); 104 105 // public for use by the internal non-product debugger. 106 NOT_PRODUCT(public:) 107 static void print_native_stack(outputStream* st, frame fr, Thread* t, 108 char* buf, int buf_size); 109 NOT_PRODUCT(private:) 110 should_report_bug(unsigned int id)111 static bool should_report_bug(unsigned int id) { 112 return (id != OOM_MALLOC_ERROR) && (id != OOM_MMAP_ERROR); 113 } 114 115 // Write a hint to the stream in case siginfo relates to a segv/bus error 116 // and the offending address points into CDS store. 117 static void check_failing_cds_access(outputStream* st, const void* siginfo); 118 119 // Timeout handling. 120 // Hook functions for platform dependend functionality: 121 static void reporting_started(); 122 static void interrupt_reporting_thread(); 123 124 // Helper function to get the current timestamp. 125 static jlong get_current_timestamp(); 126 127 // Accessors to get/set the start times for step and total timeout. 128 static void record_reporting_start_time(); 129 static jlong get_reporting_start_time(); 130 static void record_step_start_time(); 131 static jlong get_step_start_time(); 132 static void clear_step_start_time(); 133 134 public: 135 136 // return a string to describe the error 137 static char* error_string(char* buf, int buflen); 138 139 // Record status of core/minidump 140 static void record_coredump_status(const char* message, bool status); 141 142 // support for VM.info diagnostic command 143 static void print_vm_info(outputStream* st); 144 145 // main error reporting function 146 static void report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo, 147 void* context, const char* detail_fmt, ...) ATTRIBUTE_PRINTF(6, 7); 148 149 static void report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args, 150 Thread* thread, address pc, void* siginfo, void* context, 151 const char* filename, int lineno, size_t size) ATTRIBUTE_PRINTF(3, 0); 152 153 static void report_and_die(Thread* thread, unsigned int sig, address pc, 154 void* siginfo, void* context); 155 156 static void report_and_die(Thread* thread, void* context, const char* filename, int lineno, const char* message, 157 const char* detail_fmt, va_list detail_args) ATTRIBUTE_PRINTF(6, 0); 158 159 static void report_and_die(Thread* thread, const char* filename, int lineno, size_t size, 160 VMErrorType vm_err_type, const char* detail_fmt, 161 va_list detail_args) ATTRIBUTE_PRINTF(6, 0); 162 163 // reporting OutOfMemoryError 164 static void report_java_out_of_memory(const char* message); 165 166 // returns original flags for signal, if it was resetted, or -1 if 167 // signal was not changed by error reporter 168 static int get_resetted_sigflags(int sig); 169 170 // returns original handler for signal, if it was resetted, or NULL if 171 // signal was not changed by error reporter 172 static address get_resetted_sighandler(int sig); 173 174 // check to see if fatal error reporting is in progress fatal_error_in_progress()175 static bool fatal_error_in_progress() { return _first_error_tid != -1; } 176 get_first_error_tid()177 static intptr_t get_first_error_tid() { return _first_error_tid; } 178 179 // Called by the WatcherThread to check if error reporting has timed-out. 180 // Returns true if error reporting has not completed within the ErrorLogTimeout limit. 181 static bool check_timeout(); 182 183 // Support for avoiding multiple asserts 184 static bool is_error_reported(); 185 186 // Test vmassert(), fatal(), guarantee(), etc. 187 NOT_PRODUCT(static void test_error_handler();) 188 NOT_PRODUCT(static void controlled_crash(int how);) 189 190 // returns an address which is guaranteed to generate a SIGSEGV on read, 191 // for test purposes, which is not NULL and contains bits in every word 192 static void* get_segfault_address(); 193 }; 194 #endif // SHARE_UTILITIES_VMERROR_HPP 195