1 /* 2 * Copyright (c) 1997, 2021, 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_RUNTIME_ARGUMENTS_HPP 26 #define SHARE_RUNTIME_ARGUMENTS_HPP 27 28 #include "logging/logLevel.hpp" 29 #include "logging/logTag.hpp" 30 #include "memory/allocation.hpp" 31 #include "runtime/globals.hpp" 32 #include "runtime/java.hpp" 33 #include "runtime/os.hpp" 34 #include "utilities/debug.hpp" 35 #include "utilities/vmEnums.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 } append_writeable_value(const char * value)123 void append_writeable_value(const char *value) { 124 if (writeable()) { 125 append_value(value); 126 } 127 } 128 129 // Constructor 130 SystemProperty(const char* key, const char* value, bool writeable, bool internal = false); 131 }; 132 133 134 // For use by -agentlib, -agentpath and -Xrun 135 class AgentLibrary : public CHeapObj<mtArguments> { 136 friend class AgentLibraryList; 137 public: 138 // Is this library valid or not. Don't rely on os_lib == NULL as statically 139 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms 140 enum AgentState { 141 agent_invalid = 0, 142 agent_valid = 1 143 }; 144 145 private: 146 char* _name; 147 char* _options; 148 void* _os_lib; 149 bool _is_absolute_path; 150 bool _is_static_lib; 151 bool _is_instrument_lib; 152 AgentState _state; 153 AgentLibrary* _next; 154 155 public: 156 // Accessors name() const157 const char* name() const { return _name; } options() const158 char* options() const { return _options; } is_absolute_path() const159 bool is_absolute_path() const { return _is_absolute_path; } os_lib() const160 void* os_lib() const { return _os_lib; } set_os_lib(void * os_lib)161 void set_os_lib(void* os_lib) { _os_lib = os_lib; } next() const162 AgentLibrary* next() const { return _next; } is_static_lib() const163 bool is_static_lib() const { return _is_static_lib; } is_instrument_lib() const164 bool is_instrument_lib() const { return _is_instrument_lib; } set_static_lib(bool is_static_lib)165 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; } valid()166 bool valid() { return (_state == agent_valid); } set_valid()167 void set_valid() { _state = agent_valid; } set_invalid()168 void set_invalid() { _state = agent_invalid; } 169 170 // Constructor 171 AgentLibrary(const char* name, const char* options, bool is_absolute_path, 172 void* os_lib, bool instrument_lib=false); 173 }; 174 175 // maintain an order of entry list of AgentLibrary 176 class AgentLibraryList { 177 private: 178 AgentLibrary* _first; 179 AgentLibrary* _last; 180 public: is_empty() const181 bool is_empty() const { return _first == NULL; } first() const182 AgentLibrary* first() const { return _first; } 183 184 // add to the end of the list add(AgentLibrary * lib)185 void add(AgentLibrary* lib) { 186 if (is_empty()) { 187 _first = _last = lib; 188 } else { 189 _last->_next = lib; 190 _last = lib; 191 } 192 lib->_next = NULL; 193 } 194 195 // search for and remove a library known to be in the list remove(AgentLibrary * lib)196 void remove(AgentLibrary* lib) { 197 AgentLibrary* curr; 198 AgentLibrary* prev = NULL; 199 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) { 200 if (curr == lib) { 201 break; 202 } 203 } 204 assert(curr != NULL, "always should be found"); 205 206 if (curr != NULL) { 207 // it was found, by-pass this library 208 if (prev == NULL) { 209 _first = curr->_next; 210 } else { 211 prev->_next = curr->_next; 212 } 213 if (curr == _last) { 214 _last = prev; 215 } 216 curr->_next = NULL; 217 } 218 } 219 AgentLibraryList()220 AgentLibraryList() { 221 _first = NULL; 222 _last = NULL; 223 } 224 }; 225 226 // Helper class for controlling the lifetime of JavaVMInitArgs objects. 227 class ScopedVMInitArgs; 228 229 class Arguments : AllStatic { 230 friend class VMStructs; 231 friend class JvmtiExport; 232 friend class CodeCacheExtensions; 233 friend class ArgumentsTest; 234 public: 235 // Operation modi 236 enum Mode { 237 _int, // corresponds to -Xint 238 _mixed, // corresponds to -Xmixed 239 _comp // corresponds to -Xcomp 240 }; 241 242 enum ArgsRange { 243 arg_unreadable = -3, 244 arg_too_small = -2, 245 arg_too_big = -1, 246 arg_in_range = 0 247 }; 248 249 enum PropertyAppendable { 250 AppendProperty, 251 AddProperty 252 }; 253 254 enum PropertyWriteable { 255 WriteableProperty, 256 UnwriteableProperty 257 }; 258 259 enum PropertyInternal { 260 InternalProperty, 261 ExternalProperty 262 }; 263 264 private: 265 266 // a pointer to the flags file name if it is specified 267 static char* _jvm_flags_file; 268 // an array containing all flags specified in the .hotspotrc file 269 static char** _jvm_flags_array; 270 static int _num_jvm_flags; 271 // an array containing all jvm arguments specified in the command line 272 static char** _jvm_args_array; 273 static int _num_jvm_args; 274 // string containing all java command (class/jarfile name and app args) 275 static char* _java_command; 276 277 // Property list 278 static SystemProperty* _system_properties; 279 280 // Quick accessor to System properties in the list: 281 static SystemProperty *_sun_boot_library_path; 282 static SystemProperty *_java_library_path; 283 static SystemProperty *_java_home; 284 static SystemProperty *_java_class_path; 285 static SystemProperty *_jdk_boot_class_path_append; 286 static SystemProperty *_vm_info; 287 288 // --patch-module=module=<file>(<pathsep><file>)* 289 // Each element contains the associated module name, path 290 // string pair as specified to --patch-module. 291 static GrowableArray<ModulePatchPath*>* _patch_mod_prefix; 292 293 // The constructed value of the system class path after 294 // argument processing and JVMTI OnLoad additions via 295 // calls to AddToBootstrapClassLoaderSearch. This is the 296 // final form before ClassLoader::setup_bootstrap_search(). 297 // Note: since --patch-module is a module name/path pair, the 298 // system boot class path string no longer contains the "prefix" 299 // to the boot class path base piece as it did when 300 // -Xbootclasspath/p was supported. 301 static PathString *_system_boot_class_path; 302 303 // Set if a modular java runtime image is present vs. a build with exploded modules 304 static bool _has_jimage; 305 306 // temporary: to emit warning if the default ext dirs are not empty. 307 // remove this variable when the warning is no longer needed. 308 static char* _ext_dirs; 309 310 // java.vendor.url.bug, bug reporting URL for fatal errors. 311 static const char* _java_vendor_url_bug; 312 313 // sun.java.launcher, private property to provide information about 314 // java launcher 315 static const char* _sun_java_launcher; 316 317 // was this VM created via the -XXaltjvm=<path> option 318 static bool _sun_java_launcher_is_altjvm; 319 320 // Option flags 321 static const char* _gc_log_filename; 322 // Value of the conservative maximum heap alignment needed 323 static size_t _conservative_max_heap_alignment; 324 325 // -Xrun arguments 326 static AgentLibraryList _libraryList; 327 static void add_init_library(const char* name, char* options); 328 329 // -agentlib and -agentpath arguments 330 static AgentLibraryList _agentList; 331 static void add_init_agent(const char* name, char* options, bool absolute_path); 332 static void add_instrument_agent(const char* name, char* options, bool absolute_path); 333 334 // Late-binding agents not started via arguments 335 static void add_loaded_agent(AgentLibrary *agentLib); 336 337 // Operation modi 338 static Mode _mode; 339 static void set_mode_flags(Mode mode); 340 static bool _java_compiler; set_java_compiler(bool arg)341 static void set_java_compiler(bool arg) { _java_compiler = arg; } java_compiler()342 static bool java_compiler() { return _java_compiler; } 343 344 // -Xdebug flag 345 static bool _xdebug_mode; set_xdebug_mode(bool arg)346 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; } xdebug_mode()347 static bool xdebug_mode() { return _xdebug_mode; } 348 349 // preview features 350 static bool _enable_preview; 351 352 // Used to save default settings 353 static bool _AlwaysCompileLoopMethods; 354 static bool _UseOnStackReplacement; 355 static bool _BackgroundCompilation; 356 static bool _ClipInlining; 357 358 // GC ergonomics 359 static void set_conservative_max_heap_alignment(); 360 static void set_use_compressed_oops(); 361 static void set_use_compressed_klass_ptrs(); 362 static jint set_ergonomics_flags(); 363 static jint set_shared_spaces_flags_and_archive_paths(); 364 // Limits the given heap size by the maximum amount of virtual 365 // memory this process is currently allowed to use. It also takes 366 // the virtual-to-physical ratio of the current GC into account. 367 static size_t limit_heap_by_allocatable_memory(size_t size); 368 // Setup heap size 369 static void set_heap_size(); 370 371 // Bytecode rewriting 372 static void set_bytecode_flags(); 373 374 // Invocation API hooks 375 static abort_hook_t _abort_hook; 376 static exit_hook_t _exit_hook; 377 static vfprintf_hook_t _vfprintf_hook; 378 379 // System properties 380 static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty, 381 PropertyInternal internal=ExternalProperty); 382 383 // Used for module system related properties: converted from command-line flags. 384 // Basic properties are writeable as they operate as "last one wins" and will get overwritten. 385 // Numbered properties are never writeable, and always internal. 386 static bool create_module_property(const char* prop_name, const char* prop_value, PropertyInternal internal); 387 static bool create_numbered_module_property(const char* prop_base_name, const char* prop_value, unsigned int count); 388 389 static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase); 390 391 // Aggressive optimization flags. 392 static jint set_aggressive_opts_flags(); 393 394 static jint set_aggressive_heap_flags(); 395 396 // Argument parsing 397 static bool parse_argument(const char* arg, JVMFlagOrigin origin); 398 static bool process_argument(const char* arg, jboolean ignore_unrecognized, JVMFlagOrigin origin); 399 static void process_java_launcher_argument(const char*, void*); 400 static void process_java_compiler_argument(const char* arg); 401 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args); 402 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args); 403 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args); 404 static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args); 405 static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args); 406 static jint parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize); 407 static jint insert_vm_options_file(const JavaVMInitArgs* args, 408 const char* vm_options_file, 409 const int vm_options_file_pos, 410 ScopedVMInitArgs* vm_options_file_args, 411 ScopedVMInitArgs* args_out); 412 static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args); 413 static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 414 ScopedVMInitArgs* mod_args, 415 JavaVMInitArgs** args_out); 416 static jint match_special_option_and_act(const JavaVMInitArgs* args, 417 ScopedVMInitArgs* args_out); 418 419 static bool handle_deprecated_print_gc_flags(); 420 421 static jint parse_vm_init_args(const JavaVMInitArgs *vm_options_args, 422 const JavaVMInitArgs *java_tool_options_args, 423 const JavaVMInitArgs *java_options_args, 424 const JavaVMInitArgs *cmd_line_args); 425 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlagOrigin origin); 426 static jint finalize_vm_init_args(bool patch_mod_javabase); 427 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type); 428 is_bad_option(const JavaVMOption * option,jboolean ignore)429 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) { 430 return is_bad_option(option, ignore, NULL); 431 } 432 433 static void describe_range_error(ArgsRange errcode); 434 static ArgsRange check_memory_size(julong size, julong min_size, julong max_size); 435 static ArgsRange parse_memory_size(const char* s, julong* long_arg, 436 julong min_size, julong max_size = max_uintx); 437 438 // methods to build strings from individual args 439 static void build_jvm_args(const char* arg); 440 static void build_jvm_flags(const char* arg); 441 static void add_string(char*** bldarray, int* count, const char* arg); 442 static const char* build_resource_string(char** args, int count); 443 444 // Returns true if the flag is obsolete (and not yet expired). 445 // In this case the 'version' buffer is filled in with 446 // the version number when the flag became obsolete. 447 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version); 448 449 // Returns 1 if the flag is deprecated (and not yet obsolete or expired). 450 // In this case the 'version' buffer is filled in with the version number when 451 // the flag became deprecated. 452 // Returns -1 if the flag is expired or obsolete. 453 // Returns 0 otherwise. 454 static int is_deprecated_flag(const char* flag_name, JDK_Version* version); 455 456 // Return the real name for the flag passed on the command line (either an alias name or "flag_name"). 457 static const char* real_flag_name(const char *flag_name); 458 459 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated. 460 // Return NULL if the arg has expired. 461 static const char* handle_aliases_and_deprecation(const char* arg, bool warn); 462 463 static char* SharedArchivePath; 464 static char* SharedDynamicArchivePath; 465 static size_t _default_SharedBaseAddress; // The default value specified in globals.hpp 466 static int num_archives(const char* archive_path) NOT_CDS_RETURN_(0); 467 static void extract_shared_archive_paths(const char* archive_path, 468 char** base_archive_path, 469 char** top_archive_path) NOT_CDS_RETURN; 470 471 public: 472 // Parses the arguments, first phase 473 static jint parse(const JavaVMInitArgs* args); 474 // Parse a string for a unsigned integer. Returns true if value 475 // is an unsigned integer greater than or equal to the minimum 476 // parameter passed and returns the value in uintx_arg. Returns 477 // false otherwise, with uintx_arg undefined. 478 static bool parse_uintx(const char* value, uintx* uintx_arg, 479 uintx min_size); 480 // Apply ergonomics 481 static jint apply_ergo(); 482 // Adjusts the arguments after the OS have adjusted the arguments 483 static jint adjust_after_os(); 484 485 // Check consistency or otherwise of VM argument settings 486 static bool check_vm_args_consistency(); 487 // Used by os_solaris 488 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized); 489 conservative_max_heap_alignment()490 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; } 491 // Return the maximum size a heap with compressed oops can take 492 static size_t max_heap_for_compressed_oops(); 493 494 // return a char* array containing all options jvm_flags_array()495 static char** jvm_flags_array() { return _jvm_flags_array; } jvm_args_array()496 static char** jvm_args_array() { return _jvm_args_array; } num_jvm_flags()497 static int num_jvm_flags() { return _num_jvm_flags; } num_jvm_args()498 static int num_jvm_args() { return _num_jvm_args; } 499 // return the arguments passed to the Java application java_command()500 static const char* java_command() { return _java_command; } 501 502 // print jvm_flags, jvm_args and java_command 503 static void print_on(outputStream* st); 504 static void print_summary_on(outputStream* st); 505 506 // convenient methods to get and set jvm_flags_file get_jvm_flags_file()507 static const char* get_jvm_flags_file() { return _jvm_flags_file; } set_jvm_flags_file(const char * value)508 static void set_jvm_flags_file(const char *value) { 509 if (_jvm_flags_file != NULL) { 510 os::free(_jvm_flags_file); 511 } 512 _jvm_flags_file = os::strdup_check_oom(value); 513 } 514 // convenient methods to obtain / print jvm_flags and jvm_args jvm_flags()515 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); } jvm_args()516 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); } 517 static void print_jvm_flags_on(outputStream* st); 518 static void print_jvm_args_on(outputStream* st); 519 520 // -Dkey=value flags system_properties()521 static SystemProperty* system_properties() { return _system_properties; } 522 static const char* get_property(const char* key); 523 524 // -Djava.vendor.url.bug java_vendor_url_bug()525 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; } 526 527 // -Dsun.java.launcher sun_java_launcher()528 static const char* sun_java_launcher() { return _sun_java_launcher; } 529 // Was VM created by a Java launcher? 530 static bool created_by_java_launcher(); 531 // -Dsun.java.launcher.is_altjvm 532 static bool sun_java_launcher_is_altjvm(); 533 534 // -Xrun libraries()535 static AgentLibrary* libraries() { return _libraryList.first(); } init_libraries_at_startup()536 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); } convert_library_to_agent(AgentLibrary * lib)537 static void convert_library_to_agent(AgentLibrary* lib) 538 { _libraryList.remove(lib); 539 _agentList.add(lib); } 540 541 // -agentlib -agentpath agents()542 static AgentLibrary* agents() { return _agentList.first(); } init_agents_at_startup()543 static bool init_agents_at_startup() { return !_agentList.is_empty(); } 544 545 // abort, exit, vfprintf hooks abort_hook()546 static abort_hook_t abort_hook() { return _abort_hook; } exit_hook()547 static exit_hook_t exit_hook() { return _exit_hook; } vfprintf_hook()548 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; } 549 GetSharedArchivePath()550 static const char* GetSharedArchivePath() { return SharedArchivePath; } GetSharedDynamicArchivePath()551 static const char* GetSharedDynamicArchivePath() { return SharedDynamicArchivePath; } default_SharedBaseAddress()552 static size_t default_SharedBaseAddress() { return _default_SharedBaseAddress; } 553 // Java launcher properties 554 static void process_sun_java_launcher_properties(JavaVMInitArgs* args); 555 556 // System properties 557 static void init_system_properties(); 558 559 // Update/Initialize System properties after JDK version number is known 560 static void init_version_specific_system_properties(); 561 562 // Update VM info property - called after argument parsing update_vm_info_property(const char * vm_info)563 static void update_vm_info_property(const char* vm_info) { 564 _vm_info->set_value(vm_info); 565 } 566 567 // Property List manipulation 568 static void PropertyList_add(SystemProperty *element); 569 static void PropertyList_add(SystemProperty** plist, SystemProperty *element); 570 static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal); 571 572 static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, 573 PropertyAppendable append, PropertyWriteable writeable, 574 PropertyInternal internal); 575 static const char* PropertyList_get_value(SystemProperty* plist, const char* key); 576 static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key); 577 static int PropertyList_count(SystemProperty* pl); 578 static int PropertyList_readable_count(SystemProperty* pl); 579 static const char* PropertyList_get_key_at(SystemProperty* pl,int index); 580 static char* PropertyList_get_value_at(SystemProperty* pl,int index); 581 582 static bool is_internal_module_property(const char* option); 583 584 // Miscellaneous System property value getter and setters. set_dll_dir(const char * value)585 static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); } set_java_home(const char * value)586 static void set_java_home(const char *value) { _java_home->set_value(value); } set_library_path(const char * value)587 static void set_library_path(const char *value) { _java_library_path->set_value(value); } set_ext_dirs(char * value)588 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); } 589 590 // Set up the underlying pieces of the system boot class path 591 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)592 static void set_sysclasspath(const char *value, bool has_jimage) { 593 // During start up, set by os::set_boot_path() 594 assert(get_sysclasspath() == NULL, "System boot class path previously set"); 595 _system_boot_class_path->set_value(value); 596 _has_jimage = has_jimage; 597 } append_sysclasspath(const char * value)598 static void append_sysclasspath(const char *value) { 599 _system_boot_class_path->append_value(value); 600 _jdk_boot_class_path_append->append_value(value); 601 } 602 get_patch_mod_prefix()603 static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; } get_sysclasspath()604 static char* get_sysclasspath() { return _system_boot_class_path->value(); } get_jdk_boot_class_path_append()605 static char* get_jdk_boot_class_path_append() { return _jdk_boot_class_path_append->value(); } has_jimage()606 static bool has_jimage() { return _has_jimage; } 607 get_java_home()608 static char* get_java_home() { return _java_home->value(); } get_dll_dir()609 static char* get_dll_dir() { return _sun_boot_library_path->value(); } get_ext_dirs()610 static char* get_ext_dirs() { return _ext_dirs; } get_appclasspath()611 static char* get_appclasspath() { return _java_class_path->value(); } 612 static void fix_appclasspath(); 613 614 static char* get_default_shared_archive_path() NOT_CDS_RETURN_(NULL); 615 static bool init_shared_archive_paths() NOT_CDS_RETURN_(false); 616 617 // Operation modi mode()618 static Mode mode() { return _mode; } is_interpreter_only()619 static bool is_interpreter_only() { return mode() == _int; } is_compiler_only()620 static bool is_compiler_only() { return mode() == _comp; } 621 622 623 // preview features set_enable_preview()624 static void set_enable_preview() { _enable_preview = true; } enable_preview()625 static bool enable_preview() { return _enable_preview; } 626 627 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid. 628 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen); 629 630 static void check_unsupported_dumping_properties() NOT_CDS_RETURN; 631 632 static bool check_unsupported_cds_runtime_properties() NOT_CDS_RETURN0; 633 634 static bool atojulong(const char *s, julong* result); 635 636 static bool has_jfr_option() NOT_JFR_RETURN_(false); 637 is_dumping_archive()638 static bool is_dumping_archive() { return DumpSharedSpaces || DynamicDumpSharedSpaces; } 639 assert_is_dumping_archive()640 static void assert_is_dumping_archive() { 641 assert(Arguments::is_dumping_archive(), "dump time only"); 642 } 643 644 DEBUG_ONLY(static bool verify_special_jvm_flags(bool check_globals);) 645 }; 646 647 // Disable options not supported in this release, with a warning if they 648 // were explicitly requested on the command-line 649 #define UNSUPPORTED_OPTION(opt) \ 650 do { \ 651 if (opt) { \ 652 if (FLAG_IS_CMDLINE(opt)) { \ 653 warning("-XX:+" #opt " not supported in this VM"); \ 654 } \ 655 FLAG_SET_DEFAULT(opt, false); \ 656 } \ 657 } while(0) 658 659 // similar to UNSUPPORTED_OPTION but sets flag to NULL 660 #define UNSUPPORTED_OPTION_NULL(opt) \ 661 do { \ 662 if (opt) { \ 663 if (FLAG_IS_CMDLINE(opt)) { \ 664 warning("-XX flag " #opt " not supported in this VM"); \ 665 } \ 666 FLAG_SET_DEFAULT(opt, NULL); \ 667 } \ 668 } while(0) 669 670 // Initialize options not supported in this release, with a warning 671 // if they were explicitly requested on the command-line 672 #define UNSUPPORTED_OPTION_INIT(opt, value) \ 673 do { \ 674 if (FLAG_IS_CMDLINE(opt)) { \ 675 warning("-XX flag " #opt " not supported in this VM"); \ 676 } \ 677 FLAG_SET_DEFAULT(opt, value); \ 678 } while(0) 679 680 #endif // SHARE_RUNTIME_ARGUMENTS_HPP 681