1 /* 2 * Copyright (c) 1997, 2015, 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 "runtime/java.hpp" 29 #include "runtime/os.hpp" 30 #include "runtime/perfData.hpp" 31 #include "utilities/debug.hpp" 32 #include "utilities/top.hpp" 33 34 // Arguments parses the command line and recognizes options 35 36 // Invocation API hook typedefs (these should really be defined in jni.hpp) 37 extern "C" { 38 typedef void (JNICALL *abort_hook_t)(void); 39 typedef void (JNICALL *exit_hook_t)(jint code); 40 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0); 41 } 42 43 // Forward declarations 44 45 class SysClassPath; 46 47 // Element describing System and User (-Dkey=value flags) defined property. 48 49 class SystemProperty: public CHeapObj<mtInternal> { 50 private: 51 char* _key; 52 char* _value; 53 SystemProperty* _next; 54 bool _writeable; 55 bool writeable() { return _writeable; } 56 57 public: 58 // Accessors 59 const char* key() const { return _key; } 60 char* value() const { return _value; } 61 SystemProperty* next() const { return _next; } 62 void set_next(SystemProperty* next) { _next = next; } 63 bool set_value(char *value) { 64 if (writeable()) { 65 if (_value != NULL) { 66 FreeHeap(_value); 67 } 68 _value = AllocateHeap(strlen(value)+1, mtInternal); 69 if (_value != NULL) { 70 strcpy(_value, value); 71 } 72 return true; 73 } 74 return false; 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, mtInternal); 86 if (sp != NULL) { 87 if (_value != NULL) { 88 strcpy(sp, _value); 89 strcat(sp, os::path_separator()); 90 strcat(sp, value); 91 FreeHeap(_value); 92 } else { 93 strcpy(sp, value); 94 } 95 _value = sp; 96 } 97 } 98 } 99 100 // Constructor 101 SystemProperty(const char* key, const char* value, bool writeable) { 102 if (key == NULL) { 103 _key = NULL; 104 } else { 105 _key = AllocateHeap(strlen(key)+1, mtInternal); 106 strcpy(_key, key); 107 } 108 if (value == NULL) { 109 _value = NULL; 110 } else { 111 _value = AllocateHeap(strlen(value)+1, mtInternal); 112 strcpy(_value, value); 113 } 114 _next = NULL; 115 _writeable = writeable; 116 } 117 }; 118 119 120 // For use by -agentlib, -agentpath and -Xrun 121 class AgentLibrary : public CHeapObj<mtInternal> { 122 friend class AgentLibraryList; 123 public: 124 // Is this library valid or not. Don't rely on os_lib == NULL as statically 125 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms 126 enum AgentState { 127 agent_invalid = 0, 128 agent_valid = 1 129 }; 130 131 private: 132 char* _name; 133 char* _options; 134 void* _os_lib; 135 bool _is_absolute_path; 136 bool _is_static_lib; 137 AgentState _state; 138 AgentLibrary* _next; 139 140 public: 141 // Accessors 142 const char* name() const { return _name; } 143 char* options() const { return _options; } 144 bool is_absolute_path() const { return _is_absolute_path; } 145 void* os_lib() const { return _os_lib; } 146 void set_os_lib(void* os_lib) { _os_lib = os_lib; } 147 AgentLibrary* next() const { return _next; } 148 bool is_static_lib() const { return _is_static_lib; } 149 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; } 150 bool valid() { return (_state == agent_valid); } 151 void set_valid() { _state = agent_valid; } 152 void set_invalid() { _state = agent_invalid; } 153 154 // Constructor 155 AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) { 156 _name = AllocateHeap(strlen(name)+1, mtInternal); 157 strcpy(_name, name); 158 if (options == NULL) { 159 _options = NULL; 160 } else { 161 _options = AllocateHeap(strlen(options)+1, mtInternal); 162 strcpy(_options, options); 163 } 164 _is_absolute_path = is_absolute_path; 165 _os_lib = os_lib; 166 _next = NULL; 167 _state = agent_invalid; 168 _is_static_lib = false; 169 } 170 }; 171 172 // maintain an order of entry list of AgentLibrary 173 class AgentLibraryList VALUE_OBJ_CLASS_SPEC { 174 private: 175 AgentLibrary* _first; 176 AgentLibrary* _last; 177 public: 178 bool is_empty() const { return _first == NULL; } 179 AgentLibrary* first() const { return _first; } 180 181 // add to the end of the list 182 void add(AgentLibrary* lib) { 183 if (is_empty()) { 184 _first = _last = lib; 185 } else { 186 _last->_next = lib; 187 _last = lib; 188 } 189 lib->_next = NULL; 190 } 191 192 // search for and remove a library known to be in the list 193 void remove(AgentLibrary* lib) { 194 AgentLibrary* curr; 195 AgentLibrary* prev = NULL; 196 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) { 197 if (curr == lib) { 198 break; 199 } 200 } 201 assert(curr != NULL, "always should be found"); 202 203 if (curr != NULL) { 204 // it was found, by-pass this library 205 if (prev == NULL) { 206 _first = curr->_next; 207 } else { 208 prev->_next = curr->_next; 209 } 210 if (curr == _last) { 211 _last = prev; 212 } 213 curr->_next = NULL; 214 } 215 } 216 217 AgentLibraryList() { 218 _first = NULL; 219 _last = NULL; 220 } 221 }; 222 223 // Helper class for controlling the lifetime of JavaVMInitArgs objects. 224 class ScopedVMInitArgs; 225 226 class Arguments : AllStatic { 227 friend class VMStructs; 228 friend class JvmtiExport; 229 friend class CodeCacheExtensions; 230 public: 231 // Operation modi 232 enum Mode { 233 _int, // corresponds to -Xint 234 _mixed, // corresponds to -Xmixed 235 _comp // corresponds to -Xcomp 236 }; 237 238 enum ArgsRange { 239 arg_unreadable = -3, 240 arg_too_small = -2, 241 arg_too_big = -1, 242 arg_in_range = 0 243 }; 244 245 private: 246 247 // an array containing all flags specified in the .hotspotrc file 248 static char** _jvm_flags_array; 249 static int _num_jvm_flags; 250 // an array containing all jvm arguments specified in the command line 251 static char** _jvm_args_array; 252 static int _num_jvm_args; 253 // string containing all java command (class/jarfile name and app args) 254 static char* _java_command; 255 256 // Property list 257 static SystemProperty* _system_properties; 258 259 // Quick accessor to System properties in the list: 260 static SystemProperty *_sun_boot_library_path; 261 static SystemProperty *_java_library_path; 262 static SystemProperty *_java_home; 263 static SystemProperty *_java_class_path; 264 static SystemProperty *_sun_boot_class_path; 265 266 // temporary: to emit warning if the default ext dirs are not empty. 267 // remove this variable when the warning is no longer needed. 268 static char* _ext_dirs; 269 270 // java.vendor.url.bug, bug reporting URL for fatal errors. 271 static const char* _java_vendor_url_bug; 272 273 // sun.java.launcher, private property to provide information about 274 // java launcher 275 static const char* _sun_java_launcher; 276 277 // sun.java.launcher.pid, private property 278 static int _sun_java_launcher_pid; 279 280 // was this VM created via the -XXaltjvm=<path> option 281 static bool _sun_java_launcher_is_altjvm; 282 283 // Option flags 284 static bool _has_profile; 285 static const char* _gc_log_filename; 286 // Value of the conservative maximum heap alignment needed 287 static size_t _conservative_max_heap_alignment; 288 289 static uintx _min_heap_size; 290 291 // Used to store original flag values 292 static uintx _min_heap_free_ratio; 293 static uintx _max_heap_free_ratio; 294 295 // -Xrun arguments 296 static AgentLibraryList _libraryList; 297 static void add_init_library(const char* name, char* options) 298 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); } 299 300 // -agentlib and -agentpath arguments 301 static AgentLibraryList _agentList; 302 static void add_init_agent(const char* name, char* options, bool absolute_path) 303 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); } 304 305 // Late-binding agents not started via arguments 306 static void add_loaded_agent(AgentLibrary *agentLib) 307 { _agentList.add(agentLib); } 308 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) 309 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); } 310 311 // Operation modi 312 static Mode _mode; 313 static void set_mode_flags(Mode mode); 314 static bool _java_compiler; 315 static void set_java_compiler(bool arg) { _java_compiler = arg; } 316 static bool java_compiler() { return _java_compiler; } 317 318 // -Xdebug flag 319 static bool _xdebug_mode; 320 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; } 321 static bool xdebug_mode() { return _xdebug_mode; } 322 323 // Used to save default settings 324 static bool _AlwaysCompileLoopMethods; 325 static bool _UseOnStackReplacement; 326 static bool _BackgroundCompilation; 327 static bool _ClipInlining; 328 static bool _CIDynamicCompilePriority; 329 static intx _Tier3InvokeNotifyFreqLog; 330 static intx _Tier4InvocationThreshold; 331 332 // Tiered 333 static void set_tiered_flags(); 334 // CMS/ParNew garbage collectors 335 static void set_parnew_gc_flags(); 336 static void set_cms_and_parnew_gc_flags(); 337 // UseParallel[Old]GC 338 static void set_parallel_gc_flags(); 339 // Garbage-First (UseG1GC) 340 static void set_g1_gc_flags(); 341 // GC ergonomics 342 static void set_conservative_max_heap_alignment(); 343 static void set_use_compressed_oops(); 344 static void set_use_compressed_klass_ptrs(); 345 static void select_gc(); 346 static void set_ergonomics_flags(); 347 static void set_shared_spaces_flags(); 348 // limits the given memory size by the maximum amount of memory this process is 349 // currently allowed to allocate or reserve. 350 static julong limit_by_allocatable_memory(julong size); 351 // Setup heap size 352 static void set_heap_size(); 353 // Set up runtime image flags 354 static void set_runtime_image_flags(); 355 // Based on automatic selection criteria, should the 356 // low pause collector be used. 357 static bool should_auto_select_low_pause_collector(); 358 359 // Bytecode rewriting 360 static void set_bytecode_flags(); 361 362 // Invocation API hooks 363 static abort_hook_t _abort_hook; 364 static exit_hook_t _exit_hook; 365 static vfprintf_hook_t _vfprintf_hook; 366 367 // System properties 368 static bool add_property(const char* prop); 369 370 // Aggressive optimization flags. 371 static void set_aggressive_opts_flags(); 372 373 static jint set_aggressive_heap_flags(); 374 375 // Argument parsing 376 static void do_pd_flag_adjustments(); 377 static bool parse_argument(const char* arg, Flag::Flags origin); 378 static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin); 379 static void process_java_launcher_argument(const char*, void*); 380 static void process_java_compiler_argument(char* arg); 381 static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args); 382 static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args); 383 static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args); 384 static jint parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 385 const JavaVMInitArgs *java_options_args, 386 const JavaVMInitArgs *cmd_line_args); 387 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, Flag::Flags origin); 388 static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required); 389 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type); 390 391 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) { 392 return is_bad_option(option, ignore, NULL); 393 } 394 395 static void describe_range_error(ArgsRange errcode); 396 static ArgsRange check_memory_size(julong size, julong min_size); 397 static ArgsRange parse_memory_size(const char* s, julong* long_arg, 398 julong min_size); 399 // Parse a string for a unsigned integer. Returns true if value 400 // is an unsigned integer greater than or equal to the minimum 401 // parameter passed and returns the value in uintx_arg. Returns 402 // false otherwise, with uintx_arg undefined. 403 static bool parse_uintx(const char* value, uintx* uintx_arg, 404 uintx min_size); 405 406 // methods to build strings from individual args 407 static void build_jvm_args(const char* arg); 408 static void build_jvm_flags(const char* arg); 409 static void add_string(char*** bldarray, int* count, const char* arg); 410 static const char* build_resource_string(char** args, int count); 411 412 static bool methodExists( 413 char* className, char* methodName, 414 int classesNum, char** classes, bool* allMethods, 415 int methodsNum, char** methods, bool* allClasses 416 ); 417 418 static void parseOnlyLine( 419 const char* line, 420 short* classesNum, short* classesMax, char*** classes, bool** allMethods, 421 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses 422 ); 423 424 // Returns true if the flag is obsolete and fits into the range specified 425 // for being ignored. In the case the 'version' buffer is filled in with 426 // the version number when the flag became obsolete. 427 static bool is_obsolete_flag(const char* flag_name, JDK_Version* version); 428 429 // Returns 1 if the flag is deprecated and jdk version is in the range specified. 430 // In this case the 'version' buffer is filled in with the version number when 431 // the flag became deprecated. 432 // Returns -1 if the flag is deprecated and has expired (should be ignored). 433 // Returns 0 if the flag is not deprecated. 434 static int is_deprecated_flag(const char* flag_name, JDK_Version* version); 435 436 // Return the real name for the flag passed on the command line (either an alias name or "flag_name"). 437 static const char* real_flag_name(const char *flag_name); 438 439 // Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated. 440 // Return NULL if the arg has expired. 441 static const char* handle_aliases_and_deprecation(const char* arg, bool warn); 442 443 static short CompileOnlyClassesNum; 444 static short CompileOnlyClassesMax; 445 static char** CompileOnlyClasses; 446 static bool* CompileOnlyAllMethods; 447 448 static short CompileOnlyMethodsNum; 449 static short CompileOnlyMethodsMax; 450 static char** CompileOnlyMethods; 451 static bool* CompileOnlyAllClasses; 452 453 static short InterpretOnlyClassesNum; 454 static short InterpretOnlyClassesMax; 455 static char** InterpretOnlyClasses; 456 static bool* InterpretOnlyAllMethods; 457 458 static bool CheckCompileOnly; 459 460 static char* SharedArchivePath; 461 462 public: 463 // Scale compile thresholds 464 // Returns threshold scaled with CompileThresholdScaling 465 static intx scaled_compile_threshold(intx threshold, double scale); 466 static intx scaled_compile_threshold(intx threshold) { 467 return scaled_compile_threshold(threshold, CompileThresholdScaling); 468 } 469 // Returns freq_log scaled with CompileThresholdScaling 470 static intx scaled_freq_log(intx freq_log, double scale); 471 static intx scaled_freq_log(intx freq_log) { 472 return scaled_freq_log(freq_log, CompileThresholdScaling); 473 } 474 475 // Parses the arguments, first phase 476 static jint parse(const JavaVMInitArgs* args); 477 // Apply ergonomics 478 static jint apply_ergo(); 479 // Adjusts the arguments after the OS have adjusted the arguments 480 static jint adjust_after_os(); 481 // Set any arguments that need to be set after the 'CommandLineFlagConstraint::AfterErgo' constraint check 482 static void post_after_ergo_constraint_check(bool check_passed); 483 484 static void set_gc_specific_flags(); 485 static inline bool gc_selected(); // whether a gc has been selected 486 static void select_gc_ergonomically(); 487 488 // Check for consistency in the selection of the garbage collector. 489 static bool check_gc_consistency(); // Check user-selected gc 490 // Check consistency or otherwise of VM argument settings 491 static bool check_vm_args_consistency(); 492 // Used by os_solaris 493 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized); 494 495 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; } 496 // Return the maximum size a heap with compressed oops can take 497 static size_t max_heap_for_compressed_oops(); 498 499 // return a char* array containing all options 500 static char** jvm_flags_array() { return _jvm_flags_array; } 501 static char** jvm_args_array() { return _jvm_args_array; } 502 static int num_jvm_flags() { return _num_jvm_flags; } 503 static int num_jvm_args() { return _num_jvm_args; } 504 // return the arguments passed to the Java application 505 static const char* java_command() { return _java_command; } 506 507 // print jvm_flags, jvm_args and java_command 508 static void print_on(outputStream* st); 509 static void print_summary_on(outputStream* st); 510 511 // convenient methods to obtain / print jvm_flags and jvm_args 512 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); } 513 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); } 514 static void print_jvm_flags_on(outputStream* st); 515 static void print_jvm_args_on(outputStream* st); 516 517 // -Dkey=value flags 518 static SystemProperty* system_properties() { return _system_properties; } 519 static const char* get_property(const char* key); 520 521 // -Djava.vendor.url.bug 522 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; } 523 524 // -Dsun.java.launcher 525 static const char* sun_java_launcher() { return _sun_java_launcher; } 526 // Was VM created by a Java launcher? 527 static bool created_by_java_launcher(); 528 // -Dsun.java.launcher.is_altjvm 529 static bool sun_java_launcher_is_altjvm(); 530 // -Dsun.java.launcher.pid 531 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; } 532 533 // -Xloggc:<file>, if not specified will be NULL 534 static const char* gc_log_filename() { return _gc_log_filename; } 535 536 // -Xprof 537 static bool has_profile() { return _has_profile; } 538 539 // -Xms 540 static size_t min_heap_size() { return _min_heap_size; } 541 static void set_min_heap_size(size_t v) { _min_heap_size = v; } 542 543 // Returns the original values of -XX:MinHeapFreeRatio and -XX:MaxHeapFreeRatio 544 static uintx min_heap_free_ratio() { return _min_heap_free_ratio; } 545 static uintx max_heap_free_ratio() { return _max_heap_free_ratio; } 546 547 // -Xrun 548 static AgentLibrary* libraries() { return _libraryList.first(); } 549 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); } 550 static void convert_library_to_agent(AgentLibrary* lib) 551 { _libraryList.remove(lib); 552 _agentList.add(lib); } 553 554 // -agentlib -agentpath 555 static AgentLibrary* agents() { return _agentList.first(); } 556 static bool init_agents_at_startup() { return !_agentList.is_empty(); } 557 558 // abort, exit, vfprintf hooks 559 static abort_hook_t abort_hook() { return _abort_hook; } 560 static exit_hook_t exit_hook() { return _exit_hook; } 561 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; } 562 563 static bool GetCheckCompileOnly () { return CheckCompileOnly; } 564 565 static const char* GetSharedArchivePath() { return SharedArchivePath; } 566 567 static bool CompileMethod(char* className, char* methodName) { 568 return 569 methodExists( 570 className, methodName, 571 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods, 572 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses 573 ); 574 } 575 576 // Java launcher properties 577 static void process_sun_java_launcher_properties(JavaVMInitArgs* args); 578 579 // System properties 580 static void init_system_properties(); 581 582 // Update/Initialize System properties after JDK version number is known 583 static void init_version_specific_system_properties(); 584 585 // Property List manipulation 586 static void PropertyList_add(SystemProperty *element); 587 static void PropertyList_add(SystemProperty** plist, SystemProperty *element); 588 static void PropertyList_add(SystemProperty** plist, const char* k, char* v); 589 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 590 PropertyList_unique_add(plist, k, v, false); 591 } 592 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append); 593 static const char* PropertyList_get_value(SystemProperty* plist, const char* key); 594 static int PropertyList_count(SystemProperty* pl); 595 static const char* PropertyList_get_key_at(SystemProperty* pl,int index); 596 static char* PropertyList_get_value_at(SystemProperty* pl,int index); 597 598 // Miscellaneous System property value getter and setters. 599 static void set_dll_dir(char *value) { _sun_boot_library_path->set_value(value); } 600 static void set_java_home(char *value) { _java_home->set_value(value); } 601 static void set_library_path(char *value) { _java_library_path->set_value(value); } 602 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); } 603 static void set_sysclasspath(char *value) { _sun_boot_class_path->set_value(value); } 604 static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); } 605 606 static char* get_java_home() { return _java_home->value(); } 607 static char* get_dll_dir() { return _sun_boot_library_path->value(); } 608 static char* get_sysclasspath() { return _sun_boot_class_path->value(); } 609 static char* get_ext_dirs() { return _ext_dirs; } 610 static char* get_appclasspath() { return _java_class_path->value(); } 611 static void fix_appclasspath(); 612 613 614 // Operation modi 615 static Mode mode() { return _mode; } 616 static bool is_interpreter_only() { return mode() == _int; } 617 618 619 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid. 620 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen); 621 }; 622 623 bool Arguments::gc_selected() { 624 return UseConcMarkSweepGC || UseG1GC || UseParallelGC || UseParallelOldGC || UseSerialGC; 625 } 626 627 // Disable options not supported in this release, with a warning if they 628 // were explicitly requested on the command-line 629 #define UNSUPPORTED_OPTION(opt, description) \ 630 do { \ 631 if (opt) { \ 632 if (FLAG_IS_CMDLINE(opt)) { \ 633 warning(description " is disabled in this release."); \ 634 } \ 635 FLAG_SET_DEFAULT(opt, false); \ 636 } \ 637 } while(0) 638 639 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP