1 /* 2 * Copyright (c) 1997, 2018, 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_VM_RUNTIME_ARGUMENTS_HPP 26 #define SHARE_VM_RUNTIME_ARGUMENTS_HPP 27 28 #include "logging/logLevel.hpp" 29 #include "logging/logTag.hpp" 30 #include "memory/allocation.hpp" 31 #include "runtime/flags/jvmFlag.hpp" 32 #include "runtime/java.hpp" 33 #include "runtime/os.hpp" 34 #include "runtime/perfData.hpp" 35 #include "utilities/debug.hpp" 36 37 // Arguments parses the command line and recognizes options 38 39 // Invocation API hook typedefs (these should really be defined in jni.h) 40 extern "C" { 41 typedef void (JNICALL *abort_hook_t)(void); 42 typedef void (JNICALL *exit_hook_t)(jint code); 43 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0); 44 } 45 46 // Obsolete or deprecated -XX flag. 47 struct SpecialFlag { 48 const char* name; 49 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined"). 50 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined"). 51 JDK_Version expired_in; // When the option expires (or "undefined"). 52 }; 53 54 // PathString is used as: 55 // - the underlying value for a SystemProperty 56 // - the path portion of an --patch-module module/path pair 57 // - the string that represents the system boot class path, Arguments::_system_boot_class_path. 58 class PathString : public CHeapObj<mtArguments> { 59 protected: 60 char* _value; 61 public: value() const62 char* value() const { return _value; } 63 64 bool set_value(const char *value); 65 void append_value(const char *value); 66 67 PathString(const char* value); 68 ~PathString(); 69 }; 70 71 // ModulePatchPath records the module/path pair as specified to --patch-module. 72 class ModulePatchPath : public CHeapObj<mtInternal> { 73 private: 74 char* _module_name; 75 PathString* _path; 76 public: 77 ModulePatchPath(const char* module_name, const char* path); 78 ~ModulePatchPath(); 79 set_path(const char * path)80 inline void set_path(const char* path) { _path->set_value(path); } module_name() const81 inline const char* module_name() const { return _module_name; } path_string() const82 inline char* path_string() const { return _path->value(); } 83 }; 84 85 // Element describing System and User (-Dkey=value flags) defined property. 86 // 87 // An internal SystemProperty is one that has been removed in 88 // jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append. 89 // 90 class SystemProperty : public PathString { 91 private: 92 char* _key; 93 SystemProperty* _next; 94 bool _internal; 95 bool _writeable; writeable()96 bool writeable() { return _writeable; } 97 98 public: 99 // Accessors value() const100 char* value() const { return PathString::value(); } key() const101 const char* key() const { return _key; } internal() const102 bool internal() const { return _internal; } next() const103 SystemProperty* next() const { return _next; } set_next(SystemProperty * next)104 void set_next(SystemProperty* next) { _next = next; } 105 is_readable() const106 bool is_readable() const { 107 return !_internal || strcmp(_key, "jdk.boot.class.path.append") == 0; 108 } 109 110 // A system property should only have its value set 111 // via an external interface if it is a writeable property. 112 // The internal, non-writeable property jdk.boot.class.path.append 113 // is the only exception to this rule. It can be set externally 114 // via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch. 115 // In those cases for jdk.boot.class.path.append, the base class 116 // set_value and append_value methods are called directly. set_writeable_value(const char * value)117 bool set_writeable_value(const char *value) { 118 if (writeable()) { 119 return set_value(value); 120 } 121 return false; 122 } 123 124 // Constructor 125 SystemProperty(const char* key, const char* value, bool writeable, bool internal = false); 126 }; 127 128 129 // For use by -agentlib, -agentpath and -Xrun 130 class AgentLibrary : public CHeapObj<mtArguments> { 131 friend class AgentLibraryList; 132 public: 133 // Is this library valid or not. Don't rely on os_lib == NULL as statically 134 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms 135 enum AgentState { 136 agent_invalid = 0, 137 agent_valid = 1 138 }; 139 140 private: 141 char* _name; 142 char* _options; 143 void* _os_lib; 144 bool _is_absolute_path; 145 bool _is_static_lib; 146 bool _is_instrument_lib; 147 AgentState _state; 148 AgentLibrary* _next; 149 150 public: 151 // Accessors name() const152 const char* name() const { return _name; } options() const153 char* options() const { return _options; } is_absolute_path() const154 bool is_absolute_path() const { return _is_absolute_path; } os_lib() const155 void* os_lib() const { return _os_lib; } set_os_lib(void * os_lib)156 void set_os_lib(void* os_lib) { _os_lib = os_lib; } next() const157 AgentLibrary* next() const { return _next; } is_static_lib() const158 bool is_static_lib() const { return _is_static_lib; } is_instrument_lib() const159 bool is_instrument_lib() const { return _is_instrument_lib; } set_static_lib(bool is_static_lib)160 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; } valid()161 bool valid() { return (_state == agent_valid); } set_valid()162 void set_valid() { _state = agent_valid; } set_invalid()163 void set_invalid() { _state = agent_invalid; } 164 165 // Constructor 166 AgentLibrary(const char* name, const char* options, bool is_absolute_path, 167 void* os_lib, bool instrument_lib=false); 168 }; 169 170 // maintain an order of entry list of AgentLibrary 171 class AgentLibraryList { 172 private: 173 AgentLibrary* _first; 174 AgentLibrary* _last; 175 public: is_empty() const176 bool is_empty() const { return _first == NULL; } first() const177 AgentLibrary* first() const { return _first; } 178 179 // add to the end of the list add(AgentLibrary * lib)180 void add(AgentLibrary* lib) { 181 if (is_empty()) { 182 _first = _last = lib; 183 } else { 184 _last->_next = lib; 185 _last = lib; 186 } 187 lib->_next = NULL; 188 } 189 190 // search for and remove a library known to be in the list remove(AgentLibrary * lib)191 void remove(AgentLibrary* lib) { 192 AgentLibrary* curr; 193 AgentLibrary* prev = NULL; 194 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) { 195 if (curr == lib) { 196 break; 197 } 198 } 199 assert(curr != NULL, "always should be found"); 200 201 if (curr != NULL) { 202 // it was found, by-pass this library 203 if (prev == NULL) { 204 _first = curr->_next; 205 } else { 206 prev->_next = curr->_next; 207 } 208 if (curr == _last) { 209 _last = prev; 210 } 211 curr->_next = NULL; 212 } 213 } 214 AgentLibraryList()215 AgentLibraryList() { 216 _first = NULL; 217 _last = NULL; 218 } 219 }; 220 221 // Helper class for controlling the lifetime of JavaVMInitArgs objects. 222 class ScopedVMInitArgs; 223 224 // Most logging functions require 5 tags. Some of them may be _NO_TAG. 225 typedef struct { 226 const char* alias_name; 227 LogLevelType level; 228 bool exactMatch; 229 LogTagType tag0; 230 LogTagType tag1; 231 LogTagType tag2; 232 LogTagType tag3; 233 LogTagType tag4; 234 LogTagType tag5; 235 } AliasedLoggingFlag; 236 237 class Arguments : AllStatic { 238 friend class VMStructs; 239 friend class JvmtiExport; 240 friend class CodeCacheExtensions; 241 friend class ArgumentsTest; 242 public: 243 // Operation modi 244 enum Mode { 245 _int, // corresponds to -Xint 246 _mixed, // corresponds to -Xmixed 247 _comp // corresponds to -Xcomp 248 }; 249 250 enum ArgsRange { 251 arg_unreadable = -3, 252 arg_too_small = -2, 253 arg_too_big = -1, 254 arg_in_range = 0 255 }; 256 257 enum PropertyAppendable { 258 AppendProperty, 259 AddProperty 260 }; 261 262 enum PropertyWriteable { 263 WriteableProperty, 264 UnwriteableProperty 265 }; 266 267 enum PropertyInternal { 268 InternalProperty, 269 ExternalProperty 270 }; 271 272 private: 273 274 // a pointer to the flags file name if it is specified 275 static char* _jvm_flags_file; 276 // an array containing all flags specified in the .hotspotrc file 277 static char** _jvm_flags_array; 278 static int _num_jvm_flags; 279 // an array containing all jvm arguments specified in the command line 280 static char** _jvm_args_array; 281 static int _num_jvm_args; 282 // string containing all java command (class/jarfile name and app args) 283 static char* _java_command; 284 285 // Property list 286 static SystemProperty* _system_properties; 287 288 // Quick accessor to System properties in the list: 289 static SystemProperty *_sun_boot_library_path; 290 static SystemProperty *_java_library_path; 291 static SystemProperty *_java_home; 292 static SystemProperty *_java_class_path; 293 static SystemProperty *_jdk_boot_class_path_append; 294 static SystemProperty *_vm_info; 295 296 // --patch-module=module=<file>(<pathsep><file>)* 297 // Each element contains the associated module name, path 298 // string pair as specified to --patch-module. 299 static GrowableArray<ModulePatchPath*>* _patch_mod_prefix; 300 301 // The constructed value of the system class path after 302 // argument processing and JVMTI OnLoad additions via 303 // calls to AddToBootstrapClassLoaderSearch. This is the 304 // final form before ClassLoader::setup_bootstrap_search(). 305 // Note: since --patch-module is a module name/path pair, the 306 // system boot class path string no longer contains the "prefix" 307 // to the boot class path base piece as it did when 308 // -Xbootclasspath/p was supported. 309 static PathString *_system_boot_class_path; 310 311 // Set if a modular java runtime image is present vs. a build with exploded modules 312 static bool _has_jimage; 313 314 // temporary: to emit warning if the default ext dirs are not empty. 315 // remove this variable when the warning is no longer needed. 316 static char* _ext_dirs; 317 318 // java.vendor.url.bug, bug reporting URL for fatal errors. 319 static const char* _java_vendor_url_bug; 320 321 // sun.java.launcher, private property to provide information about 322 // java launcher 323 static const char* _sun_java_launcher; 324 325 // sun.java.launcher.pid, private property 326 static int _sun_java_launcher_pid; 327 328 // was this VM created via the -XXaltjvm=<path> option 329 static bool _sun_java_launcher_is_altjvm; 330 331 // Option flags 332 static const char* _gc_log_filename; 333 // Value of the conservative maximum heap alignment needed 334 static size_t _conservative_max_heap_alignment; 335 336 static size_t _min_heap_size; 337 338 // -Xrun arguments 339 static AgentLibraryList _libraryList; 340 static void add_init_library(const char* name, char* options); 341 342 // -agentlib and -agentpath arguments 343 static AgentLibraryList _agentList; 344 static void add_init_agent(const char* name, char* options, bool absolute_path); 345 static void add_instrument_agent(const char* name, char* options, bool absolute_path); 346 347 // Late-binding agents not started via arguments 348 static void add_loaded_agent(AgentLibrary *agentLib); 349 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib); 350 351 // Operation modi 352 static Mode _mode; 353 static void set_mode_flags(Mode mode); 354 static bool _java_compiler; set_java_compiler(bool arg)355 static void set_java_compiler(bool arg) { _java_compiler = arg; } java_compiler()356 static bool java_compiler() { return _java_compiler; } 357 358 // -Xdebug flag 359 static bool _xdebug_mode; set_xdebug_mode(bool arg)360 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; } xdebug_mode()361 static bool xdebug_mode() { return _xdebug_mode; } 362 363 // preview features 364 static bool _enable_preview; 365 366 // Used to save default settings 367 static bool _AlwaysCompileLoopMethods; 368 static bool _UseOnStackReplacement; 369 static bool _BackgroundCompilation; 370 static bool _ClipInlining; 371 static bool _CIDynamicCompilePriority; 372 static intx _Tier3InvokeNotifyFreqLog; 373 static intx _Tier4InvocationThreshold; 374 375 // GC ergonomics 376 static void set_conservative_max_heap_alignment(); 377 static void set_use_compressed_oops(); 378 static void set_use_compressed_klass_ptrs(); 379 static jint set_ergonomics_flags(); 380 static void set_shared_spaces_flags(); 381 // limits the given memory size by the maximum amount of memory this process is 382 // currently allowed to allocate or reserve. 383 static julong limit_by_allocatable_memory(julong size); 384 // Setup heap size 385 static void set_heap_size(); 386 387 // Bytecode rewriting 388 static void set_bytecode_flags(); 389 390 // Invocation API hooks 391 static abort_hook_t _abort_hook; 392 static exit_hook_t _exit_hook; 393 static vfprintf_hook_t _vfprintf_hook; 394 395 // System properties 396 static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty, 397 PropertyInternal internal=ExternalProperty); 398 399 static bool create_property(const char* prop_name, const char* prop_value, PropertyInternal internal); 400 static bool create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count); 401 402 static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase); 403 404 // Aggressive optimization flags. 405 static jint set_aggressive_opts_flags(); 406 407 static jint set_aggressive_heap_flags(); 408 409 // Argument parsing 410 static void do_pd_flag_adjustments(); 411 static bool parse_argument(const char* arg, JVMFlag::Flags origin); 412 static bool process_argument(const char* arg, jboolean ignore_unrecognized, JVMFlag::Flags origin); 413 static void process_java_launcher_argument(const char*, void*); 414 static void process_java_compiler_argument(const char* arg); 415 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args); 416 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args); 417 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args); 418 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args); 419 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args); 420 static jint parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize); 421 static jint insert_vm_options_file(const JavaVMInitArgs* args, 422 const char* vm_options_file, 423 const int vm_options_file_pos, 424 ScopedVMInitArgs* vm_options_file_args, 425 ScopedVMInitArgs* args_out); 426 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args); 427 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 428 ScopedVMInitArgs* mod_args, 429 JavaVMInitArgs** args_out); 430 static jint match_special_option_and_act(const JavaVMInitArgs* args, 431 ScopedVMInitArgs* args_out); 432 433 static bool handle_deprecated_print_gc_flags(); 434 435 static void handle_extra_cms_flags(const char* msg); 436 437 static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 438 const JavaVMInitArgs *java_options_args, 439 const JavaVMInitArgs *cmd_line_args); 440 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin); 441 static jint finalize_vm_init_args(bool patch_mod_javabase); 442 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type); 443 is_bad_option(const JavaVMOption * option,jboolean ignore)444 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) { 445 return is_bad_option(option, ignore, NULL); 446 } 447 448 static void describe_range_error(ArgsRange errcode); 449 static ArgsRange check_memory_size(julong size, julong min_size, julong max_size); 450 static ArgsRange parse_memory_size(const char* s, julong* long_arg, 451 julong min_size, julong max_size = max_uintx); 452 // Parse a string for a unsigned integer. Returns true if value 453 // is an unsigned integer greater than or equal to the minimum 454 // parameter passed and returns the value in uintx_arg. Returns 455 // false otherwise, with uintx_arg undefined. 456 static bool parse_uintx(const char* value, uintx* uintx_arg, 457 uintx min_size); 458 459 // methods to build strings from individual args 460 static void build_jvm_args(const char* arg); 461 static void build_jvm_flags(const char* arg); 462 static void add_string(char*** bldarray, int* count, const char* arg); 463 static const char* build_resource_string(char** args, int count); 464 465 // Returns true if the flag is obsolete (and not yet expired). 466 // In this case the 'version' buffer is filled in with 467 // the version number when the flag became obsolete. 468 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version); 469 470 #ifndef PRODUCT 471 static const char* removed_develop_logging_flag_name(const char* name); 472 #endif // PRODUCT 473 474 // Returns 1 if the flag is deprecated (and not yet obsolete or expired). 475 // In this case the 'version' buffer is filled in with the version number when 476 // the flag became deprecated. 477 // Returns -1 if the flag is expired or obsolete. 478 // Returns 0 otherwise. 479 static int is_deprecated_flag(const char* flag_name, JDK_Version* version); 480 481 // Return the real name for the flag passed on the command line (either an alias name or "flag_name"). 482 static const char* real_flag_name(const char *flag_name); 483 484 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated. 485 // Return NULL if the arg has expired. 486 static const char* handle_aliases_and_deprecation(const char* arg, bool warn); 487 static bool lookup_logging_aliases(const char* arg, char* buffer); 488 static AliasedLoggingFlag catch_logging_aliases(const char* name, bool on); 489 490 static char* SharedArchivePath; 491 492 public: 493 // Parses the arguments, first phase 494 static jint parse(const JavaVMInitArgs* args); 495 // Apply ergonomics 496 static jint apply_ergo(); 497 // Adjusts the arguments after the OS have adjusted the arguments 498 static jint adjust_after_os(); 499 500 // Check for consistency in the selection of the garbage collector. 501 static bool check_gc_consistency(); // Check user-selected gc 502 // Check consistency or otherwise of VM argument settings 503 static bool check_vm_args_consistency(); 504 // Used by os_solaris 505 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized); 506 conservative_max_heap_alignment()507 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; } 508 // Return the maximum size a heap with compressed oops can take 509 static size_t max_heap_for_compressed_oops(); 510 511 // return a char* array containing all options jvm_flags_array()512 static char** jvm_flags_array() { return _jvm_flags_array; } jvm_args_array()513 static char** jvm_args_array() { return _jvm_args_array; } num_jvm_flags()514 static int num_jvm_flags() { return _num_jvm_flags; } num_jvm_args()515 static int num_jvm_args() { return _num_jvm_args; } 516 // return the arguments passed to the Java application java_command()517 static const char* java_command() { return _java_command; } 518 519 // print jvm_flags, jvm_args and java_command 520 static void print_on(outputStream* st); 521 static void print_summary_on(outputStream* st); 522 523 // convenient methods to get and set jvm_flags_file get_jvm_flags_file()524 static const char* get_jvm_flags_file() { return _jvm_flags_file; } set_jvm_flags_file(const char * value)525 static void set_jvm_flags_file(const char *value) { 526 if (_jvm_flags_file != NULL) { 527 os::free(_jvm_flags_file); 528 } 529 _jvm_flags_file = os::strdup_check_oom(value); 530 } 531 // convenient methods to obtain / print jvm_flags and jvm_args jvm_flags()532 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); } jvm_args()533 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); } 534 static void print_jvm_flags_on(outputStream* st); 535 static void print_jvm_args_on(outputStream* st); 536 537 // -Dkey=value flags system_properties()538 static SystemProperty* system_properties() { return _system_properties; } 539 static const char* get_property(const char* key); 540 541 // -Djava.vendor.url.bug java_vendor_url_bug()542 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; } 543 544 // -Dsun.java.launcher sun_java_launcher()545 static const char* sun_java_launcher() { return _sun_java_launcher; } 546 // Was VM created by a Java launcher? 547 static bool created_by_java_launcher(); 548 // -Dsun.java.launcher.is_altjvm 549 static bool sun_java_launcher_is_altjvm(); 550 // -Dsun.java.launcher.pid sun_java_launcher_pid()551 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; } 552 553 // -Xms min_heap_size()554 static size_t min_heap_size() { return _min_heap_size; } set_min_heap_size(size_t v)555 static void set_min_heap_size(size_t v) { _min_heap_size = v; } 556 557 // -Xrun libraries()558 static AgentLibrary* libraries() { return _libraryList.first(); } init_libraries_at_startup()559 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); } convert_library_to_agent(AgentLibrary * lib)560 static void convert_library_to_agent(AgentLibrary* lib) 561 { _libraryList.remove(lib); 562 _agentList.add(lib); } 563 564 // -agentlib -agentpath agents()565 static AgentLibrary* agents() { return _agentList.first(); } init_agents_at_startup()566 static bool init_agents_at_startup() { return !_agentList.is_empty(); } 567 568 // abort, exit, vfprintf hooks abort_hook()569 static abort_hook_t abort_hook() { return _abort_hook; } exit_hook()570 static exit_hook_t exit_hook() { return _exit_hook; } vfprintf_hook()571 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; } 572 GetSharedArchivePath()573 static const char* GetSharedArchivePath() { return SharedArchivePath; } 574 575 // Java launcher properties 576 static void process_sun_java_launcher_properties(JavaVMInitArgs* args); 577 578 // System properties 579 static void init_system_properties(); 580 581 // Update/Initialize System properties after JDK version number is known 582 static void init_version_specific_system_properties(); 583 584 // Update VM info property - called after argument parsing update_vm_info_property(const char * vm_info)585 static void update_vm_info_property(const char* vm_info) { 586 _vm_info->set_value(vm_info); 587 } 588 589 // Property List manipulation 590 static void PropertyList_add(SystemProperty *element); 591 static void PropertyList_add(SystemProperty** plist, SystemProperty *element); 592 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal); 593 594 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, 595 PropertyAppendable append, PropertyWriteable writeable, 596 PropertyInternal internal); 597 static const char* PropertyList_get_value(SystemProperty* plist, const char* key); 598 static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key); 599 static int PropertyList_count(SystemProperty* pl); 600 static int PropertyList_readable_count(SystemProperty* pl); 601 static const char* PropertyList_get_key_at(SystemProperty* pl,int index); 602 static char* PropertyList_get_value_at(SystemProperty* pl,int index); 603 604 static bool is_internal_module_property(const char* option); 605 606 // Miscellaneous System property value getter and setters. set_dll_dir(const char * value)607 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); } set_java_home(const char * value)608 static void set_java_home(const char *value) { _java_home->set_value(value); } set_library_path(const char * value)609 static void set_library_path(const char *value) { _java_library_path->set_value(value); } set_ext_dirs(char * value)610 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); } 611 612 // Set up the underlying pieces of the system boot class path 613 static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase); set_sysclasspath(const char * value,bool has_jimage)614 static void set_sysclasspath(const char *value, bool has_jimage) { 615 // During start up, set by os::set_boot_path() 616 assert(get_sysclasspath() == NULL, "System boot class path previously set"); 617 _system_boot_class_path->set_value(value); 618 _has_jimage = has_jimage; 619 } append_sysclasspath(const char * value)620 static void append_sysclasspath(const char *value) { 621 _system_boot_class_path->append_value(value); 622 _jdk_boot_class_path_append->append_value(value); 623 } 624 get_patch_mod_prefix()625 static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; } get_sysclasspath()626 static char* get_sysclasspath() { return _system_boot_class_path->value(); } get_jdk_boot_class_path_append()627 static char* get_jdk_boot_class_path_append() { return _jdk_boot_class_path_append->value(); } has_jimage()628 static bool has_jimage() { return _has_jimage; } 629 get_java_home()630 static char* get_java_home() { return _java_home->value(); } get_dll_dir()631 static char* get_dll_dir() { return _sun_boot_library_path->value(); } get_ext_dirs()632 static char* get_ext_dirs() { return _ext_dirs; } get_appclasspath()633 static char* get_appclasspath() { return _java_class_path->value(); } 634 static void fix_appclasspath(); 635 636 static char* get_default_shared_archive_path(); 637 638 // Operation modi mode()639 static Mode mode() { return _mode; } is_interpreter_only()640 static bool is_interpreter_only() { return mode() == _int; } 641 642 // preview features set_enable_preview()643 static void set_enable_preview() { _enable_preview = true; } enable_preview()644 static bool enable_preview() { return _enable_preview; } 645 646 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid. 647 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen); 648 649 static void check_unsupported_dumping_properties() NOT_CDS_RETURN; 650 651 static bool check_unsupported_cds_runtime_properties() NOT_CDS_RETURN0; 652 653 static bool atojulong(const char *s, julong* result); 654 }; 655 656 // Disable options not supported in this release, with a warning if they 657 // were explicitly requested on the command-line 658 #define UNSUPPORTED_OPTION(opt) \ 659 do { \ 660 if (opt) { \ 661 if (FLAG_IS_CMDLINE(opt)) { \ 662 warning("-XX:+" #opt " not supported in this VM"); \ 663 } \ 664 FLAG_SET_DEFAULT(opt, false); \ 665 } \ 666 } while(0) 667 668 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP 669