1 /* 2 * Copyright (c) 1997, 2013, 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/perfData.hpp" 30 #include "utilities/top.hpp" 31 32 // Arguments parses the command line and recognizes options 33 34 // Invocation API hook typedefs (these should really be defined in jni.hpp) 35 extern "C" { 36 typedef void (JNICALL *abort_hook_t)(void); 37 typedef void (JNICALL *exit_hook_t)(jint code); 38 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args); 39 } 40 41 // Forward declarations 42 43 class SysClassPath; 44 45 // Element describing System and User (-Dkey=value flags) defined property. 46 47 class SystemProperty: public CHeapObj<mtInternal> { 48 private: 49 char* _key; 50 char* _value; 51 SystemProperty* _next; 52 bool _writeable; 53 bool writeable() { return _writeable; } 54 55 public: 56 // Accessors 57 const char* key() const { return _key; } 58 char* value() const { return _value; } 59 SystemProperty* next() const { return _next; } 60 void set_next(SystemProperty* next) { _next = next; } 61 bool set_value(char *value) { 62 if (writeable()) { 63 if (_value != NULL) { 64 FreeHeap(_value); 65 } 66 _value = AllocateHeap(strlen(value)+1, mtInternal); 67 if (_value != NULL) { 68 strcpy(_value, value); 69 } 70 return true; 71 } 72 return false; 73 } 74 75 void append_value(const char *value) { 76 char *sp; 77 size_t len = 0; 78 if (value != NULL) { 79 len = strlen(value); 80 if (_value != NULL) { 81 len += strlen(_value); 82 } 83 sp = AllocateHeap(len+2, mtInternal); 84 if (sp != NULL) { 85 if (_value != NULL) { 86 strcpy(sp, _value); 87 strcat(sp, os::path_separator()); 88 strcat(sp, value); 89 FreeHeap(_value); 90 } else { 91 strcpy(sp, value); 92 } 93 _value = sp; 94 } 95 } 96 } 97 98 // Constructor 99 SystemProperty(const char* key, const char* value, bool writeable) { 100 if (key == NULL) { 101 _key = NULL; 102 } else { 103 _key = AllocateHeap(strlen(key)+1, mtInternal); 104 strcpy(_key, key); 105 } 106 if (value == NULL) { 107 _value = NULL; 108 } else { 109 _value = AllocateHeap(strlen(value)+1, mtInternal); 110 strcpy(_value, value); 111 } 112 _next = NULL; 113 _writeable = writeable; 114 } 115 }; 116 117 118 // For use by -agentlib, -agentpath and -Xrun 119 class AgentLibrary : public CHeapObj<mtInternal> { 120 friend class AgentLibraryList; 121 public: 122 // Is this library valid or not. Don't rely on os_lib == NULL as statically 123 // linked lib could have handle of RTLD_DEFAULT which == 0 on some platforms 124 enum AgentState { 125 agent_invalid = 0, 126 agent_valid = 1 127 }; 128 129 private: 130 char* _name; 131 char* _options; 132 void* _os_lib; 133 bool _is_absolute_path; 134 bool _is_static_lib; 135 AgentState _state; 136 AgentLibrary* _next; 137 138 public: 139 // Accessors 140 const char* name() const { return _name; } 141 char* options() const { return _options; } 142 bool is_absolute_path() const { return _is_absolute_path; } 143 void* os_lib() const { return _os_lib; } 144 void set_os_lib(void* os_lib) { _os_lib = os_lib; } 145 AgentLibrary* next() const { return _next; } 146 bool is_static_lib() const { return _is_static_lib; } 147 void set_static_lib(bool is_static_lib) { _is_static_lib = is_static_lib; } 148 bool valid() { return (_state == agent_valid); } 149 void set_valid() { _state = agent_valid; } 150 void set_invalid() { _state = agent_invalid; } 151 152 // Constructor 153 AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) { 154 _name = AllocateHeap(strlen(name)+1, mtInternal); 155 strcpy(_name, name); 156 if (options == NULL) { 157 _options = NULL; 158 } else { 159 _options = AllocateHeap(strlen(options)+1, mtInternal); 160 strcpy(_options, options); 161 } 162 _is_absolute_path = is_absolute_path; 163 _os_lib = os_lib; 164 _next = NULL; 165 _state = agent_invalid; 166 _is_static_lib = false; 167 } 168 }; 169 170 // maintain an order of entry list of AgentLibrary 171 class AgentLibraryList VALUE_OBJ_CLASS_SPEC { 172 private: 173 AgentLibrary* _first; 174 AgentLibrary* _last; 175 public: 176 bool is_empty() const { return _first == NULL; } 177 AgentLibrary* first() const { return _first; } 178 179 // add to the end of the list 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 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 } 214 215 AgentLibraryList() { 216 _first = NULL; 217 _last = NULL; 218 } 219 }; 220 221 222 class Arguments : AllStatic { 223 friend class VMStructs; 224 friend class JvmtiExport; 225 public: 226 // Operation modi 227 enum Mode { 228 _int, // corresponds to -Xint 229 _mixed, // corresponds to -Xmixed 230 _comp // corresponds to -Xcomp 231 }; 232 233 enum ArgsRange { 234 arg_unreadable = -3, 235 arg_too_small = -2, 236 arg_too_big = -1, 237 arg_in_range = 0 238 }; 239 240 private: 241 242 // an array containing all flags specified in the .hotspotrc file 243 static char** _jvm_flags_array; 244 static int _num_jvm_flags; 245 // an array containing all jvm arguments specified in the command line 246 static char** _jvm_args_array; 247 static int _num_jvm_args; 248 // string containing all java command (class/jarfile name and app args) 249 static char* _java_command; 250 251 // Property list 252 static SystemProperty* _system_properties; 253 254 // Quick accessor to System properties in the list: 255 static SystemProperty *_java_ext_dirs; 256 static SystemProperty *_java_endorsed_dirs; 257 static SystemProperty *_sun_boot_library_path; 258 static SystemProperty *_java_library_path; 259 static SystemProperty *_java_home; 260 static SystemProperty *_java_class_path; 261 static SystemProperty *_sun_boot_class_path; 262 263 // Meta-index for knowing what packages are in the boot class path 264 static char* _meta_index_path; 265 static char* _meta_index_dir; 266 267 // java.vendor.url.bug, bug reporting URL for fatal errors. 268 static const char* _java_vendor_url_bug; 269 270 // sun.java.launcher, private property to provide information about 271 // java/gamma launcher 272 static const char* _sun_java_launcher; 273 274 // sun.java.launcher.pid, private property 275 static int _sun_java_launcher_pid; 276 277 // was this VM created by the gamma launcher 278 static bool _created_by_gamma_launcher; 279 280 // Option flags 281 static bool _has_profile; 282 static const char* _gc_log_filename; 283 // Value of the conservative maximum heap alignment needed 284 static size_t _conservative_max_heap_alignment; 285 286 static uintx _min_heap_size; 287 288 // -Xrun arguments 289 static AgentLibraryList _libraryList; 290 static void add_init_library(const char* name, char* options) 291 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); } 292 293 // -agentlib and -agentpath arguments 294 static AgentLibraryList _agentList; 295 static void add_init_agent(const char* name, char* options, bool absolute_path) 296 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); } 297 298 // Late-binding agents not started via arguments 299 static void add_loaded_agent(AgentLibrary *agentLib) 300 { _agentList.add(agentLib); } 301 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) 302 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); } 303 304 // Operation modi 305 static Mode _mode; 306 static void set_mode_flags(Mode mode); 307 static bool _java_compiler; 308 static void set_java_compiler(bool arg) { _java_compiler = arg; } 309 static bool java_compiler() { return _java_compiler; } 310 311 // -Xdebug flag 312 static bool _xdebug_mode; 313 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; } 314 static bool xdebug_mode() { return _xdebug_mode; } 315 316 // Used to save default settings 317 static bool _AlwaysCompileLoopMethods; 318 static bool _UseOnStackReplacement; 319 static bool _BackgroundCompilation; 320 static bool _ClipInlining; 321 static bool _CIDynamicCompilePriority; 322 323 // Tiered 324 static void set_tiered_flags(); 325 // CMS/ParNew garbage collectors 326 static void set_parnew_gc_flags(); 327 static void set_cms_and_parnew_gc_flags(); 328 // UseParallel[Old]GC 329 static void set_parallel_gc_flags(); 330 // Garbage-First (UseG1GC) 331 static void set_g1_gc_flags(); 332 // GC ergonomics 333 static void set_conservative_max_heap_alignment(); 334 static void set_use_compressed_oops(); 335 static void set_use_compressed_klass_ptrs(); 336 static void set_ergonomics_flags(); 337 static void set_shared_spaces_flags(); 338 // limits the given memory size by the maximum amount of memory this process is 339 // currently allowed to allocate or reserve. 340 static julong limit_by_allocatable_memory(julong size); 341 // Setup heap size 342 static void set_heap_size(); 343 // Based on automatic selection criteria, should the 344 // low pause collector be used. 345 static bool should_auto_select_low_pause_collector(); 346 347 // Bytecode rewriting 348 static void set_bytecode_flags(); 349 350 // Invocation API hooks 351 static abort_hook_t _abort_hook; 352 static exit_hook_t _exit_hook; 353 static vfprintf_hook_t _vfprintf_hook; 354 355 // System properties 356 static bool add_property(const char* prop); 357 358 // Aggressive optimization flags. 359 static void set_aggressive_opts_flags(); 360 361 // Argument parsing 362 static void do_pd_flag_adjustments(); 363 static bool parse_argument(const char* arg, Flag::Flags origin); 364 static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin); 365 static void process_java_launcher_argument(const char*, void*); 366 static void process_java_compiler_argument(char* arg); 367 static jint parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p); 368 static jint parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p); 369 static jint parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p); 370 static jint parse_vm_init_args(const JavaVMInitArgs* args); 371 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, Flag::Flags origin); 372 static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required); 373 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, 374 const char* option_type); 375 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) { 376 return is_bad_option(option, ignore, NULL); 377 } 378 static bool verify_interval(uintx val, uintx min, 379 uintx max, const char* name); 380 static bool verify_min_value(intx val, intx min, const char* name); 381 static bool verify_percentage(uintx value, const char* name); 382 static void describe_range_error(ArgsRange errcode); 383 static ArgsRange check_memory_size(julong size, julong min_size); 384 static ArgsRange parse_memory_size(const char* s, julong* long_arg, 385 julong min_size); 386 // Parse a string for a unsigned integer. Returns true if value 387 // is an unsigned integer greater than or equal to the minimum 388 // parameter passed and returns the value in uintx_arg. Returns 389 // false otherwise, with uintx_arg undefined. 390 static bool parse_uintx(const char* value, uintx* uintx_arg, 391 uintx min_size); 392 393 // methods to build strings from individual args 394 static void build_jvm_args(const char* arg); 395 static void build_jvm_flags(const char* arg); 396 static void add_string(char*** bldarray, int* count, const char* arg); 397 static const char* build_resource_string(char** args, int count); 398 399 static bool methodExists( 400 char* className, char* methodName, 401 int classesNum, char** classes, bool* allMethods, 402 int methodsNum, char** methods, bool* allClasses 403 ); 404 405 static void parseOnlyLine( 406 const char* line, 407 short* classesNum, short* classesMax, char*** classes, bool** allMethods, 408 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses 409 ); 410 411 // Returns true if the string s is in the list of flags that have recently 412 // been made obsolete. If we detect one of these flags on the command 413 // line, instead of failing we print a warning message and ignore the 414 // flag. This gives the user a release or so to stop using the flag. 415 static bool is_newly_obsolete(const char* s, JDK_Version* buffer); 416 417 static short CompileOnlyClassesNum; 418 static short CompileOnlyClassesMax; 419 static char** CompileOnlyClasses; 420 static bool* CompileOnlyAllMethods; 421 422 static short CompileOnlyMethodsNum; 423 static short CompileOnlyMethodsMax; 424 static char** CompileOnlyMethods; 425 static bool* CompileOnlyAllClasses; 426 427 static short InterpretOnlyClassesNum; 428 static short InterpretOnlyClassesMax; 429 static char** InterpretOnlyClasses; 430 static bool* InterpretOnlyAllMethods; 431 432 static bool CheckCompileOnly; 433 434 static char* SharedArchivePath; 435 436 public: 437 // Parses the arguments, first phase 438 static jint parse(const JavaVMInitArgs* args); 439 // Apply ergonomics 440 static jint apply_ergo(); 441 // Adjusts the arguments after the OS have adjusted the arguments 442 static jint adjust_after_os(); 443 // Check for consistency in the selection of the garbage collector. 444 static bool check_gc_consistency(); 445 static void check_deprecated_gcs(); 446 static void check_deprecated_gc_flags(); 447 // Check consistecy or otherwise of VM argument settings 448 static bool check_vm_args_consistency(); 449 // Check stack pages settings 450 static bool check_stack_pages(); 451 // Used by os_solaris 452 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized); 453 454 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; } 455 // Return the maximum size a heap with compressed oops can take 456 static size_t max_heap_for_compressed_oops(); 457 458 // return a char* array containing all options 459 static char** jvm_flags_array() { return _jvm_flags_array; } 460 static char** jvm_args_array() { return _jvm_args_array; } 461 static int num_jvm_flags() { return _num_jvm_flags; } 462 static int num_jvm_args() { return _num_jvm_args; } 463 // return the arguments passed to the Java application 464 static const char* java_command() { return _java_command; } 465 466 // print jvm_flags, jvm_args and java_command 467 static void print_on(outputStream* st); 468 469 // convenient methods to obtain / print jvm_flags and jvm_args 470 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); } 471 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); } 472 static void print_jvm_flags_on(outputStream* st); 473 static void print_jvm_args_on(outputStream* st); 474 475 // -Dkey=value flags 476 static SystemProperty* system_properties() { return _system_properties; } 477 static const char* get_property(const char* key); 478 479 // -Djava.vendor.url.bug 480 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; } 481 482 // -Dsun.java.launcher 483 static const char* sun_java_launcher() { return _sun_java_launcher; } 484 // Was VM created by a Java launcher? 485 static bool created_by_java_launcher(); 486 // Was VM created by the gamma Java launcher? 487 static bool created_by_gamma_launcher(); 488 // -Dsun.java.launcher.pid 489 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; } 490 491 // -Xloggc:<file>, if not specified will be NULL 492 static const char* gc_log_filename() { return _gc_log_filename; } 493 494 // -Xprof 495 static bool has_profile() { return _has_profile; } 496 497 // -Xms, -Xmx 498 static uintx min_heap_size() { return _min_heap_size; } 499 static void set_min_heap_size(uintx v) { _min_heap_size = v; } 500 501 // -Xrun 502 static AgentLibrary* libraries() { return _libraryList.first(); } 503 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); } 504 static void convert_library_to_agent(AgentLibrary* lib) 505 { _libraryList.remove(lib); 506 _agentList.add(lib); } 507 508 // -agentlib -agentpath 509 static AgentLibrary* agents() { return _agentList.first(); } 510 static bool init_agents_at_startup() { return !_agentList.is_empty(); } 511 512 // abort, exit, vfprintf hooks 513 static abort_hook_t abort_hook() { return _abort_hook; } 514 static exit_hook_t exit_hook() { return _exit_hook; } 515 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; } 516 517 static bool GetCheckCompileOnly () { return CheckCompileOnly; } 518 519 static const char* GetSharedArchivePath() { return SharedArchivePath; } 520 521 static bool CompileMethod(char* className, char* methodName) { 522 return 523 methodExists( 524 className, methodName, 525 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods, 526 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses 527 ); 528 } 529 530 // Java launcher properties 531 static void process_sun_java_launcher_properties(JavaVMInitArgs* args); 532 533 // System properties 534 static void init_system_properties(); 535 536 // Update/Initialize System properties after JDK version number is known 537 static void init_version_specific_system_properties(); 538 539 // Property List manipulation 540 static void PropertyList_add(SystemProperty** plist, SystemProperty *element); 541 static void PropertyList_add(SystemProperty** plist, const char* k, char* v); 542 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 543 PropertyList_unique_add(plist, k, v, false); 544 } 545 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append); 546 static const char* PropertyList_get_value(SystemProperty* plist, const char* key); 547 static int PropertyList_count(SystemProperty* pl); 548 static const char* PropertyList_get_key_at(SystemProperty* pl,int index); 549 static char* PropertyList_get_value_at(SystemProperty* pl,int index); 550 551 // Miscellaneous System property value getter and setters. 552 static void set_dll_dir(char *value) { _sun_boot_library_path->set_value(value); } 553 static void set_java_home(char *value) { _java_home->set_value(value); } 554 static void set_library_path(char *value) { _java_library_path->set_value(value); } 555 static void set_ext_dirs(char *value) { _java_ext_dirs->set_value(value); } 556 static void set_endorsed_dirs(char *value) { _java_endorsed_dirs->set_value(value); } 557 static void set_sysclasspath(char *value) { _sun_boot_class_path->set_value(value); } 558 static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); } 559 static void set_meta_index_path(char* meta_index_path, char* meta_index_dir) { 560 _meta_index_path = meta_index_path; 561 _meta_index_dir = meta_index_dir; 562 } 563 564 static char *get_java_home() { return _java_home->value(); } 565 static char *get_dll_dir() { return _sun_boot_library_path->value(); } 566 static char *get_endorsed_dir() { return _java_endorsed_dirs->value(); } 567 static char *get_sysclasspath() { return _sun_boot_class_path->value(); } 568 static char* get_meta_index_path() { return _meta_index_path; } 569 static char* get_meta_index_dir() { return _meta_index_dir; } 570 571 // Operation modi 572 static Mode mode() { return _mode; } 573 574 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid. 575 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen); 576 }; 577 578 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP