1 /* 2 * Copyright (c) 1997, 2017, 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 "runtime/java.hpp" 31 #include "runtime/os.hpp" 32 #include "runtime/perfData.hpp" 33 #include "utilities/debug.hpp" 34 35 // Arguments parses the command line and recognizes options 36 37 // Invocation API hook typedefs (these should really be defined in jni.hpp) 38 extern "C" { 39 typedef void (JNICALL *abort_hook_t)(void); 40 typedef void (JNICALL *exit_hook_t)(jint code); 41 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0); 42 } 43 44 // Obsolete or deprecated -XX flag. 45 struct SpecialFlag { 46 const char* name; 47 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined"). 48 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined"). 49 JDK_Version expired_in; // When the option expires (or "undefined"). 50 }; 51 52 // PathString is used as: 53 // - the underlying value for a SystemProperty 54 // - the path portion of an --patch-module module/path pair 55 // - the string that represents the system boot class path, Arguments::_system_boot_class_path. 56 class PathString : public CHeapObj<mtArguments> { 57 protected: 58 char* _value; 59 public: 60 char* value() const { return _value; } 61 62 bool set_value(const char *value) { 63 if (_value != NULL) { 64 FreeHeap(_value); 65 } 66 _value = AllocateHeap(strlen(value)+1, mtArguments); 67 assert(_value != NULL, "Unable to allocate space for new path value"); 68 if (_value != NULL) { 69 strcpy(_value, value); 70 } else { 71 // not able to allocate 72 return false; 73 } 74 return true; 75 } 76 77 void append_value(const char *value) { 78 char *sp; 79 size_t len = 0; 80 if (value != NULL) { 81 len = strlen(value); 82 if (_value != NULL) { 83 len += strlen(_value); 84 } 85 sp = AllocateHeap(len+2, mtArguments); 86 assert(sp != NULL, "Unable to allocate space for new append path value"); 87 if (sp != NULL) { 88 if (_value != NULL) { 89 strcpy(sp, _value); 90 strcat(sp, os::path_separator()); 91 strcat(sp, value); 92 FreeHeap(_value); 93 } else { 94 strcpy(sp, value); 95 } 96 _value = sp; 97 } 98 } 99 } 100 101 PathString(const char* value) { 102 if (value == NULL) { 103 _value = NULL; 104 } else { 105 _value = AllocateHeap(strlen(value)+1, mtArguments); 106 strcpy(_value, value); 107 } 108 } 109 110 ~PathString() { 111 if (_value != NULL) { 112 FreeHeap(_value); 113 _value = NULL; 114 } 115 } 116 }; 117 118 // ModulePatchPath records the module/path pair as specified to --patch-module. 119 class ModulePatchPath : public CHeapObj<mtInternal> { 120 private: 121 char* _module_name; 122 PathString* _path; 123 public: 124 ModulePatchPath(const char* module_name, const char* path) { 125 assert(module_name != NULL && path != NULL, "Invalid module name or path value"); 126 size_t len = strlen(module_name) + 1; 127 _module_name = AllocateHeap(len, mtInternal); 128 strncpy(_module_name, module_name, len); // copy the trailing null 129 _path = new PathString(path); 130 } 131 132 ~ModulePatchPath() { 133 if (_module_name != NULL) { 134 FreeHeap(_module_name); 135 _module_name = NULL; 136 } 137 if (_path != NULL) { 138 delete _path; 139 _path = NULL; 140 } 141 } 142 143 inline void set_path(const char* path) { _path->set_value(path); } 144 inline const char* module_name() const { return _module_name; } 145 inline char* path_string() const { return _path->value(); } 146 }; 147 148 // Element describing System and User (-Dkey=value flags) defined property. 149 // 150 // An internal SystemProperty is one that has been removed in 151 // jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append. 152 // 153 class SystemProperty : public PathString { 154 private: 155 char* _key; 156 SystemProperty* _next; 157 bool _internal; 158 bool _writeable; 159 bool writeable() { return _writeable; } 160 161 public: 162 // Accessors 163 char* value() const { return PathString::value(); } 164 const char* key() const { return _key; } 165 bool internal() const { return _internal; } 166 SystemProperty* next() const { return _next; } 167 void set_next(SystemProperty* next) { _next = next; } 168 169 bool is_readable() const { 170 return !_internal || strcmp(_key, "jdk.boot.class.path.append") == 0; 171 } 172 173 // A system property should only have its value set 174 // via an external interface if it is a writeable property. 175 // The internal, non-writeable property jdk.boot.class.path.append 176 // is the only exception to this rule. It can be set externally 177 // via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch. 178 // In those cases for jdk.boot.class.path.append, the base class 179 // set_value and append_value methods are called directly. 180 bool set_writeable_value(const char *value) { 181 if (writeable()) { 182 return set_value(value); 183 } 184 return false; 185 } 186 187 // Constructor 188 SystemProperty(const char* key, const char* value, bool writeable, bool internal = false) : PathString(value) { 189 if (key == NULL) { 190 _key = NULL; 191 } else { 192 _key = AllocateHeap(strlen(key)+1, mtArguments); 193 strcpy(_key, key); 194 } 195 _next = NULL; 196 _internal = internal; 197 _writeable = writeable; 198 } 199 }; 200 201 202 // For use by -agentlib, -agentpath and -Xrun 203 class AgentLibrary : public CHeapObj<mtArguments> { 204 friend class AgentLibraryList; 205 public: 206 // Is this library valid or not. Don't rely on os_lib == NULL as statically 207 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms 208 enum AgentState { 209 agent_invalid = 0, 210 agent_valid = 1 211 }; 212 213 private: 214 char* _name; 215 char* _options; 216 void* _os_lib; 217 bool _is_absolute_path; 218 bool _is_static_lib; 219 AgentState _state; 220 AgentLibrary* _next; 221 222 public: 223 // Accessors 224 const char* name() const { return _name; } 225 char* options() const { return _options; } 226 bool is_absolute_path() const { return _is_absolute_path; } 227 void* os_lib() const { return _os_lib; } 228 void set_os_lib(void* os_lib) { _os_lib = os_lib; } 229 AgentLibrary* next() const { return _next; } 230 bool is_static_lib() const { return _is_static_lib; } 231 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; } 232 bool valid() { return (_state == agent_valid); } 233 void set_valid() { _state = agent_valid; } 234 void set_invalid() { _state = agent_invalid; } 235 236 // Constructor 237 AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) { 238 _name = AllocateHeap(strlen(name)+1, mtArguments); 239 strcpy(_name, name); 240 if (options == NULL) { 241 _options = NULL; 242 } else { 243 _options = AllocateHeap(strlen(options)+1, mtArguments); 244 strcpy(_options, options); 245 } 246 _is_absolute_path = is_absolute_path; 247 _os_lib = os_lib; 248 _next = NULL; 249 _state = agent_invalid; 250 _is_static_lib = false; 251 } 252 }; 253 254 // maintain an order of entry list of AgentLibrary 255 class AgentLibraryList VALUE_OBJ_CLASS_SPEC { 256 private: 257 AgentLibrary* _first; 258 AgentLibrary* _last; 259 public: 260 bool is_empty() const { return _first == NULL; } 261 AgentLibrary* first() const { return _first; } 262 263 // add to the end of the list 264 void add(AgentLibrary* lib) { 265 if (is_empty()) { 266 _first = _last = lib; 267 } else { 268 _last->_next = lib; 269 _last = lib; 270 } 271 lib->_next = NULL; 272 } 273 274 // search for and remove a library known to be in the list 275 void remove(AgentLibrary* lib) { 276 AgentLibrary* curr; 277 AgentLibrary* prev = NULL; 278 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) { 279 if (curr == lib) { 280 break; 281 } 282 } 283 assert(curr != NULL, "always should be found"); 284 285 if (curr != NULL) { 286 // it was found, by-pass this library 287 if (prev == NULL) { 288 _first = curr->_next; 289 } else { 290 prev->_next = curr->_next; 291 } 292 if (curr == _last) { 293 _last = prev; 294 } 295 curr->_next = NULL; 296 } 297 } 298 299 AgentLibraryList() { 300 _first = NULL; 301 _last = NULL; 302 } 303 }; 304 305 // Helper class for controlling the lifetime of JavaVMInitArgs objects. 306 class ScopedVMInitArgs; 307 308 // Most logging functions require 5 tags. Some of them may be _NO_TAG. 309 typedef struct { 310 const char* alias_name; 311 LogLevelType level; 312 bool exactMatch; 313 LogTagType tag0; 314 LogTagType tag1; 315 LogTagType tag2; 316 LogTagType tag3; 317 LogTagType tag4; 318 LogTagType tag5; 319 } AliasedLoggingFlag; 320 321 class Arguments : AllStatic { 322 friend class VMStructs; 323 friend class JvmtiExport; 324 friend class CodeCacheExtensions; 325 public: 326 // Operation modi 327 enum Mode { 328 _int, // corresponds to -Xint 329 _mixed, // corresponds to -Xmixed 330 _comp // corresponds to -Xcomp 331 }; 332 333 enum ArgsRange { 334 arg_unreadable = -3, 335 arg_too_small = -2, 336 arg_too_big = -1, 337 arg_in_range = 0 338 }; 339 340 enum PropertyAppendable { 341 AppendProperty, 342 AddProperty 343 }; 344 345 enum PropertyWriteable { 346 WriteableProperty, 347 UnwriteableProperty 348 }; 349 350 enum PropertyInternal { 351 InternalProperty, 352 ExternalProperty 353 }; 354 355 private: 356 357 // a pointer to the flags file name if it is specified 358 static char* _jvm_flags_file; 359 // an array containing all flags specified in the .hotspotrc file 360 static char** _jvm_flags_array; 361 static int _num_jvm_flags; 362 // an array containing all jvm arguments specified in the command line 363 static char** _jvm_args_array; 364 static int _num_jvm_args; 365 // string containing all java command (class/jarfile name and app args) 366 static char* _java_command; 367 368 // Property list 369 static SystemProperty* _system_properties; 370 371 // Quick accessor to System properties in the list: 372 static SystemProperty *_sun_boot_library_path; 373 static SystemProperty *_java_library_path; 374 static SystemProperty *_java_home; 375 static SystemProperty *_java_class_path; 376 static SystemProperty *_jdk_boot_class_path_append; 377 378 // --patch-module=module=<file>(<pathsep><file>)* 379 // Each element contains the associated module name, path 380 // string pair as specified to --patch-module. 381 static GrowableArray<ModulePatchPath*>* _patch_mod_prefix; 382 383 // The constructed value of the system class path after 384 // argument processing and JVMTI OnLoad additions via 385 // calls to AddToBootstrapClassLoaderSearch. This is the 386 // final form before ClassLoader::setup_bootstrap_search(). 387 // Note: since --patch-module is a module name/path pair, the 388 // system boot class path string no longer contains the "prefix" 389 // to the boot class path base piece as it did when 390 // -Xbootclasspath/p was supported. 391 static PathString *_system_boot_class_path; 392 393 // Set if a modular java runtime image is present vs. a build with exploded modules 394 static bool _has_jimage; 395 396 // temporary: to emit warning if the default ext dirs are not empty. 397 // remove this variable when the warning is no longer needed. 398 static char* _ext_dirs; 399 400 // java.vendor.url.bug, bug reporting URL for fatal errors. 401 static const char* _java_vendor_url_bug; 402 403 // sun.java.launcher, private property to provide information about 404 // java launcher 405 static const char* _sun_java_launcher; 406 407 // sun.java.launcher.pid, private property 408 static int _sun_java_launcher_pid; 409 410 // was this VM created via the -XXaltjvm=<path> option 411 static bool _sun_java_launcher_is_altjvm; 412 413 // Option flags 414 static bool _has_profile; 415 static const char* _gc_log_filename; 416 // Value of the conservative maximum heap alignment needed 417 static size_t _conservative_max_heap_alignment; 418 419 static uintx _min_heap_size; 420 421 // -Xrun arguments 422 static AgentLibraryList _libraryList; 423 static void add_init_library(const char* name, char* options) 424 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); } 425 426 // -agentlib and -agentpath arguments 427 static AgentLibraryList _agentList; 428 static void add_init_agent(const char* name, char* options, bool absolute_path) 429 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); } 430 431 // Late-binding agents not started via arguments 432 static void add_loaded_agent(AgentLibrary *agentLib) 433 { _agentList.add(agentLib); } 434 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) 435 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); } 436 437 // Operation modi 438 static Mode _mode; 439 static void set_mode_flags(Mode mode); 440 static bool _java_compiler; 441 static void set_java_compiler(bool arg) { _java_compiler = arg; } 442 static bool java_compiler() { return _java_compiler; } 443 444 // -Xdebug flag 445 static bool _xdebug_mode; 446 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; } 447 static bool xdebug_mode() { return _xdebug_mode; } 448 449 // Used to save default settings 450 static bool _AlwaysCompileLoopMethods; 451 static bool _UseOnStackReplacement; 452 static bool _BackgroundCompilation; 453 static bool _ClipInlining; 454 static bool _CIDynamicCompilePriority; 455 static intx _Tier3InvokeNotifyFreqLog; 456 static intx _Tier4InvocationThreshold; 457 458 // Compilation mode. 459 static bool compilation_mode_selected(); 460 static void select_compilation_mode_ergonomically(); 461 462 // Tiered 463 static void set_tiered_flags(); 464 // CMS/ParNew garbage collectors 465 static void set_parnew_gc_flags(); 466 static void set_cms_and_parnew_gc_flags(); 467 // UseParallel[Old]GC 468 static void set_parallel_gc_flags(); 469 // Garbage-First (UseG1GC) 470 static void set_g1_gc_flags(); 471 // GC ergonomics 472 static void set_conservative_max_heap_alignment(); 473 static void set_use_compressed_oops(); 474 static void set_use_compressed_klass_ptrs(); 475 static void select_gc(); 476 static void set_ergonomics_flags(); 477 static void set_shared_spaces_flags(); 478 // limits the given memory size by the maximum amount of memory this process is 479 // currently allowed to allocate or reserve. 480 static julong limit_by_allocatable_memory(julong size); 481 // Setup heap size 482 static void set_heap_size(); 483 484 // Bytecode rewriting 485 static void set_bytecode_flags(); 486 487 // Invocation API hooks 488 static abort_hook_t _abort_hook; 489 static exit_hook_t _exit_hook; 490 static vfprintf_hook_t _vfprintf_hook; 491 492 // System properties 493 static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty, 494 PropertyInternal internal=ExternalProperty); 495 496 static bool create_property(const char* prop_name, const char* prop_value, PropertyInternal internal); 497 static bool create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count); 498 499 static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase); 500 501 // Aggressive optimization flags. 502 static jint set_aggressive_opts_flags(); 503 504 static jint set_aggressive_heap_flags(); 505 506 // Argument parsing 507 static void do_pd_flag_adjustments(); 508 static bool parse_argument(const char* arg, Flag::Flags origin); 509 static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin); 510 static void process_java_launcher_argument(const char*, void*); 511 static void process_java_compiler_argument(const char* arg); 512 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args); 513 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args); 514 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args); 515 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args); 516 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args); 517 static jint insert_vm_options_file(const JavaVMInitArgs* args, 518 const char* vm_options_file, 519 const int vm_options_file_pos, 520 ScopedVMInitArgs* vm_options_file_args, 521 ScopedVMInitArgs* args_out); 522 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args); 523 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 524 ScopedVMInitArgs* mod_args, 525 JavaVMInitArgs** args_out); 526 static jint match_special_option_and_act(const JavaVMInitArgs* args, 527 ScopedVMInitArgs* args_out); 528 529 static bool handle_deprecated_print_gc_flags(); 530 531 static void handle_extra_cms_flags(const char* msg); 532 533 static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 534 const JavaVMInitArgs *java_options_args, 535 const JavaVMInitArgs *cmd_line_args); 536 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin); 537 static jint finalize_vm_init_args(); 538 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type); 539 540 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) { 541 return is_bad_option(option, ignore, NULL); 542 } 543 544 static void describe_range_error(ArgsRange errcode); 545 static ArgsRange check_memory_size(julong size, julong min_size); 546 static ArgsRange parse_memory_size(const char* s, julong* long_arg, 547 julong min_size); 548 // Parse a string for a unsigned integer. Returns true if value 549 // is an unsigned integer greater than or equal to the minimum 550 // parameter passed and returns the value in uintx_arg. Returns 551 // false otherwise, with uintx_arg undefined. 552 static bool parse_uintx(const char* value, uintx* uintx_arg, 553 uintx min_size); 554 555 // methods to build strings from individual args 556 static void build_jvm_args(const char* arg); 557 static void build_jvm_flags(const char* arg); 558 static void add_string(char*** bldarray, int* count, const char* arg); 559 static const char* build_resource_string(char** args, int count); 560 561 static bool methodExists( 562 char* className, char* methodName, 563 int classesNum, char** classes, bool* allMethods, 564 int methodsNum, char** methods, bool* allClasses 565 ); 566 567 static void parseOnlyLine( 568 const char* line, 569 short* classesNum, short* classesMax, char*** classes, bool** allMethods, 570 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses 571 ); 572 573 // Returns true if the flag is obsolete (and not yet expired). 574 // In this case the 'version' buffer is filled in with 575 // the version number when the flag became obsolete. 576 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version); 577 578 #ifndef PRODUCT 579 static const char* removed_develop_logging_flag_name(const char* name); 580 #endif // PRODUCT 581 582 // Returns 1 if the flag is deprecated (and not yet obsolete or expired). 583 // In this case the 'version' buffer is filled in with the version number when 584 // the flag became deprecated. 585 // Returns -1 if the flag is expired or obsolete. 586 // Returns 0 otherwise. 587 static int is_deprecated_flag(const char* flag_name, JDK_Version* version); 588 589 // Return the real name for the flag passed on the command line (either an alias name or "flag_name"). 590 static const char* real_flag_name(const char *flag_name); 591 592 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated. 593 // Return NULL if the arg has expired. 594 static const char* handle_aliases_and_deprecation(const char* arg, bool warn); 595 static bool lookup_logging_aliases(const char* arg, char* buffer); 596 static AliasedLoggingFlag catch_logging_aliases(const char* name, bool on); 597 static short CompileOnlyClassesNum; 598 static short CompileOnlyClassesMax; 599 static char** CompileOnlyClasses; 600 static bool* CompileOnlyAllMethods; 601 602 static short CompileOnlyMethodsNum; 603 static short CompileOnlyMethodsMax; 604 static char** CompileOnlyMethods; 605 static bool* CompileOnlyAllClasses; 606 607 static short InterpretOnlyClassesNum; 608 static short InterpretOnlyClassesMax; 609 static char** InterpretOnlyClasses; 610 static bool* InterpretOnlyAllMethods; 611 612 static bool CheckCompileOnly; 613 614 static char* SharedArchivePath; 615 616 public: 617 // Scale compile thresholds 618 // Returns threshold scaled with CompileThresholdScaling 619 static intx scaled_compile_threshold(intx threshold, double scale); 620 static intx scaled_compile_threshold(intx threshold) { 621 return scaled_compile_threshold(threshold, CompileThresholdScaling); 622 } 623 // Returns freq_log scaled with CompileThresholdScaling 624 static intx scaled_freq_log(intx freq_log, double scale); 625 static intx scaled_freq_log(intx freq_log) { 626 return scaled_freq_log(freq_log, CompileThresholdScaling); 627 } 628 629 // Parses the arguments, first phase 630 static jint parse(const JavaVMInitArgs* args); 631 // Apply ergonomics 632 static jint apply_ergo(); 633 // Adjusts the arguments after the OS have adjusted the arguments 634 static jint adjust_after_os(); 635 636 static void set_gc_specific_flags(); 637 static bool gc_selected(); // whether a gc has been selected 638 static void select_gc_ergonomically(); 639 #if INCLUDE_JVMCI 640 // Check consistency of jvmci vm argument settings. 641 static bool check_jvmci_args_consistency(); 642 static void set_jvmci_specific_flags(); 643 #endif 644 // Check for consistency in the selection of the garbage collector. 645 static bool check_gc_consistency(); // Check user-selected gc 646 // Check consistency or otherwise of VM argument settings 647 static bool check_vm_args_consistency(); 648 // Used by os_solaris 649 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized); 650 651 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; } 652 // Return the maximum size a heap with compressed oops can take 653 static size_t max_heap_for_compressed_oops(); 654 655 // return a char* array containing all options 656 static char** jvm_flags_array() { return _jvm_flags_array; } 657 static char** jvm_args_array() { return _jvm_args_array; } 658 static int num_jvm_flags() { return _num_jvm_flags; } 659 static int num_jvm_args() { return _num_jvm_args; } 660 // return the arguments passed to the Java application 661 static const char* java_command() { return _java_command; } 662 663 // print jvm_flags, jvm_args and java_command 664 static void print_on(outputStream* st); 665 static void print_summary_on(outputStream* st); 666 667 // convenient methods to get and set jvm_flags_file 668 static const char* get_jvm_flags_file() { return _jvm_flags_file; } 669 static void set_jvm_flags_file(const char *value) { 670 if (_jvm_flags_file != NULL) { 671 os::free(_jvm_flags_file); 672 } 673 _jvm_flags_file = os::strdup_check_oom(value); 674 } 675 // convenient methods to obtain / print jvm_flags and jvm_args 676 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); } 677 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); } 678 static void print_jvm_flags_on(outputStream* st); 679 static void print_jvm_args_on(outputStream* st); 680 681 // -Dkey=value flags 682 static SystemProperty* system_properties() { return _system_properties; } 683 static const char* get_property(const char* key); 684 685 // -Djava.vendor.url.bug 686 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; } 687 688 // -Dsun.java.launcher 689 static const char* sun_java_launcher() { return _sun_java_launcher; } 690 // Was VM created by a Java launcher? 691 static bool created_by_java_launcher(); 692 // -Dsun.java.launcher.is_altjvm 693 static bool sun_java_launcher_is_altjvm(); 694 // -Dsun.java.launcher.pid 695 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; } 696 697 // -Xprof 698 static bool has_profile() { return _has_profile; } 699 700 // -Xms 701 static size_t min_heap_size() { return _min_heap_size; } 702 static void set_min_heap_size(size_t v) { _min_heap_size = v; } 703 704 // -Xrun 705 static AgentLibrary* libraries() { return _libraryList.first(); } 706 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); } 707 static void convert_library_to_agent(AgentLibrary* lib) 708 { _libraryList.remove(lib); 709 _agentList.add(lib); } 710 711 // -agentlib -agentpath 712 static AgentLibrary* agents() { return _agentList.first(); } 713 static bool init_agents_at_startup() { return !_agentList.is_empty(); } 714 715 // abort, exit, vfprintf hooks 716 static abort_hook_t abort_hook() { return _abort_hook; } 717 static exit_hook_t exit_hook() { return _exit_hook; } 718 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; } 719 720 static bool GetCheckCompileOnly () { return CheckCompileOnly; } 721 722 static const char* GetSharedArchivePath() { return SharedArchivePath; } 723 724 static bool CompileMethod(char* className, char* methodName) { 725 return 726 methodExists( 727 className, methodName, 728 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods, 729 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses 730 ); 731 } 732 733 // Java launcher properties 734 static void process_sun_java_launcher_properties(JavaVMInitArgs* args); 735 736 // System properties 737 static void init_system_properties(); 738 739 // Update/Initialize System properties after JDK version number is known 740 static void init_version_specific_system_properties(); 741 742 // Property List manipulation 743 static void PropertyList_add(SystemProperty *element); 744 static void PropertyList_add(SystemProperty** plist, SystemProperty *element); 745 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal); 746 747 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, 748 PropertyAppendable append, PropertyWriteable writeable, 749 PropertyInternal internal); 750 static const char* PropertyList_get_value(SystemProperty* plist, const char* key); 751 static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key); 752 static int PropertyList_count(SystemProperty* pl); 753 static int PropertyList_readable_count(SystemProperty* pl); 754 static const char* PropertyList_get_key_at(SystemProperty* pl,int index); 755 static char* PropertyList_get_value_at(SystemProperty* pl,int index); 756 757 static bool is_internal_module_property(const char* option); 758 759 // Miscellaneous System property value getter and setters. 760 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); } 761 static void set_java_home(const char *value) { _java_home->set_value(value); } 762 static void set_library_path(const char *value) { _java_library_path->set_value(value); } 763 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); } 764 765 // Set up the underlying pieces of the system boot class path 766 static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase); 767 static void set_sysclasspath(const char *value, bool has_jimage) { 768 // During start up, set by os::set_boot_path() 769 assert(get_sysclasspath() == NULL, "System boot class path previously set"); 770 _system_boot_class_path->set_value(value); 771 _has_jimage = has_jimage; 772 } 773 static void append_sysclasspath(const char *value) { 774 _system_boot_class_path->append_value(value); 775 _jdk_boot_class_path_append->append_value(value); 776 } 777 778 static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; } 779 static char* get_sysclasspath() { return _system_boot_class_path->value(); } 780 static char* get_jdk_boot_class_path_append() { return _jdk_boot_class_path_append->value(); } 781 static bool has_jimage() { return _has_jimage; } 782 783 static char* get_java_home() { return _java_home->value(); } 784 static char* get_dll_dir() { return _sun_boot_library_path->value(); } 785 static char* get_ext_dirs() { return _ext_dirs; } 786 static char* get_appclasspath() { return _java_class_path->value(); } 787 static void fix_appclasspath(); 788 789 790 // Operation modi 791 static Mode mode() { return _mode; } 792 static bool is_interpreter_only() { return mode() == _int; } 793 794 795 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid. 796 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen); 797 798 static void check_unsupported_dumping_properties() NOT_CDS_RETURN; 799 800 static bool atojulong(const char *s, julong* result); 801 }; 802 803 // Disable options not supported in this release, with a warning if they 804 // were explicitly requested on the command-line 805 #define UNSUPPORTED_OPTION(opt) \ 806 do { \ 807 if (opt) { \ 808 if (FLAG_IS_CMDLINE(opt)) { \ 809 warning("-XX:+" #opt " not supported in this VM"); \ 810 } \ 811 FLAG_SET_DEFAULT(opt, false); \ 812 } \ 813 } while(0) 814 815 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP