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 }; 222 223 224 class Arguments : AllStatic { 225 friend class VMStructs; 226 friend class JvmtiExport; 227 public: 228 // Operation modi 229 enum Mode { 230 _int, // corresponds to -Xint 231 _mixed, // corresponds to -Xmixed 232 _comp // corresponds to -Xcomp 233 }; 234 235 enum ArgsRange { 236 arg_unreadable = -3, 237 arg_too_small = -2, 238 arg_too_big = -1, 239 arg_in_range = 0 240 }; 241 242 private: 243 244 // an array containing all flags specified in the .hotspotrc file 245 static char** _jvm_flags_array; 246 static int _num_jvm_flags; 247 // an array containing all jvm arguments specified in the command line 248 static char** _jvm_args_array; 249 static int _num_jvm_args; 250 // string containing all java command (class/jarfile name and app args) 251 static char* _java_command; 252 253 // Property list 254 static SystemProperty* _system_properties; 255 256 // Quick accessor to System properties in the list: 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 // temporary: to emit warning if the default ext dirs are not empty. 268 // remove this variable when the warning is no longer needed. 269 static char* _ext_dirs; 270 271 // java.vendor.url.bug, bug reporting URL for fatal errors. 272 static const char* _java_vendor_url_bug; 273 274 // sun.java.launcher, private property to provide information about 275 // java launcher 276 static const char* _sun_java_launcher; 277 278 // sun.java.launcher.pid, private property 279 static int _sun_java_launcher_pid; 280 281 // was this VM created via the -XXaltjvm=<path> option 282 static bool _sun_java_launcher_is_altjvm; 283 284 // Option flags 285 static bool _has_profile; 286 static const char* _gc_log_filename; 287 // Value of the conservative maximum heap alignment needed 288 static size_t _conservative_max_heap_alignment; 289 290 static uintx _min_heap_size; 291 292 // Used to store original flag values 293 static uintx _min_heap_free_ratio; 294 static uintx _max_heap_free_ratio; 295 296 // -Xrun arguments 297 static AgentLibraryList _libraryList; 298 static void add_init_library(const char* name, char* options) 299 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); } 300 301 // -agentlib and -agentpath arguments 302 static AgentLibraryList _agentList; 303 static void add_init_agent(const char* name, char* options, bool absolute_path) 304 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); } 305 306 // Late-binding agents not started via arguments 307 static void add_loaded_agent(AgentLibrary *agentLib) 308 { _agentList.add(agentLib); } 309 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) 310 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); } 311 312 // Operation modi 313 static Mode _mode; 314 static void set_mode_flags(Mode mode); 315 static bool _java_compiler; 316 static void set_java_compiler(bool arg) { _java_compiler = arg; } 317 static bool java_compiler() { return _java_compiler; } 318 319 // -Xdebug flag 320 static bool _xdebug_mode; 321 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; } 322 static bool xdebug_mode() { return _xdebug_mode; } 323 324 // Used to save default settings 325 static bool _AlwaysCompileLoopMethods; 326 static bool _UseOnStackReplacement; 327 static bool _BackgroundCompilation; 328 static bool _ClipInlining; 329 static bool _CIDynamicCompilePriority; 330 331 // Tiered 332 static void set_tiered_flags(); 333 static int get_min_number_of_compiler_threads(); 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 // Based on automatic selection criteria, should the 354 // low pause collector be used. 355 static bool should_auto_select_low_pause_collector(); 356 357 // Bytecode rewriting 358 static void set_bytecode_flags(); 359 360 // Invocation API hooks 361 static abort_hook_t _abort_hook; 362 static exit_hook_t _exit_hook; 363 static vfprintf_hook_t _vfprintf_hook; 364 365 // System properties 366 static bool add_property(const char* prop); 367 368 // Aggressive optimization flags. 369 static void set_aggressive_opts_flags(); 370 371 // Argument parsing 372 static void do_pd_flag_adjustments(); 373 static bool parse_argument(const char* arg, Flag::Flags origin); 374 static bool process_argument(const char* arg, jboolean ignore_unrecognized, Flag::Flags origin); 375 static void process_java_launcher_argument(const char*, void*); 376 static void process_java_compiler_argument(char* arg); 377 static jint parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p); 378 static jint parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p); 379 static jint parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p); 380 static jint parse_vm_init_args(const JavaVMInitArgs* args); 381 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, Flag::Flags origin); 382 static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required); 383 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type); 384 385 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) { 386 return is_bad_option(option, ignore, NULL); 387 } 388 389 static bool is_percentage(uintx val) { 390 return val <= 100; 391 } 392 393 static bool verify_interval(uintx val, uintx min, 394 uintx max, const char* name); 395 static bool verify_min_value(intx val, intx min, const char* name); 396 static bool verify_percentage(uintx value, const char* name); 397 static void describe_range_error(ArgsRange errcode); 398 static ArgsRange check_memory_size(julong size, julong min_size); 399 static ArgsRange parse_memory_size(const char* s, julong* long_arg, 400 julong min_size); 401 // Parse a string for a unsigned integer. Returns true if value 402 // is an unsigned integer greater than or equal to the minimum 403 // parameter passed and returns the value in uintx_arg. Returns 404 // false otherwise, with uintx_arg undefined. 405 static bool parse_uintx(const char* value, uintx* uintx_arg, 406 uintx min_size); 407 408 // methods to build strings from individual args 409 static void build_jvm_args(const char* arg); 410 static void build_jvm_flags(const char* arg); 411 static void add_string(char*** bldarray, int* count, const char* arg); 412 static const char* build_resource_string(char** args, int count); 413 414 static bool methodExists( 415 char* className, char* methodName, 416 int classesNum, char** classes, bool* allMethods, 417 int methodsNum, char** methods, bool* allClasses 418 ); 419 420 static void parseOnlyLine( 421 const char* line, 422 short* classesNum, short* classesMax, char*** classes, bool** allMethods, 423 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses 424 ); 425 426 // Returns true if the string s is in the list of flags that have recently 427 // been made obsolete. If we detect one of these flags on the command 428 // line, instead of failing we print a warning message and ignore the 429 // flag. This gives the user a release or so to stop using the flag. 430 static bool is_newly_obsolete(const char* s, JDK_Version* buffer); 431 432 static short CompileOnlyClassesNum; 433 static short CompileOnlyClassesMax; 434 static char** CompileOnlyClasses; 435 static bool* CompileOnlyAllMethods; 436 437 static short CompileOnlyMethodsNum; 438 static short CompileOnlyMethodsMax; 439 static char** CompileOnlyMethods; 440 static bool* CompileOnlyAllClasses; 441 442 static short InterpretOnlyClassesNum; 443 static short InterpretOnlyClassesMax; 444 static char** InterpretOnlyClasses; 445 static bool* InterpretOnlyAllMethods; 446 447 static bool CheckCompileOnly; 448 449 static char* SharedArchivePath; 450 451 public: 452 // Scale compile thresholds 453 // Returns threshold scaled with CompileThresholdScaling 454 static intx scaled_compile_threshold(intx threshold, double scale); 455 static intx scaled_compile_threshold(intx threshold) { 456 return scaled_compile_threshold(threshold, CompileThresholdScaling); 457 } 458 // Returns freq_log scaled with CompileThresholdScaling 459 static intx scaled_freq_log(intx freq_log, double scale); 460 static intx scaled_freq_log(intx freq_log) { 461 return scaled_freq_log(freq_log, CompileThresholdScaling); 462 } 463 464 // Parses the arguments, first phase 465 static jint parse(const JavaVMInitArgs* args); 466 // Apply ergonomics 467 static jint apply_ergo(); 468 // Adjusts the arguments after the OS have adjusted the arguments 469 static jint adjust_after_os(); 470 471 static void set_gc_specific_flags(); 472 static inline bool gc_selected(); // whether a gc has been selected 473 static void select_gc_ergonomically(); 474 475 // Verifies that the given value will fit as a MinHeapFreeRatio. If not, an error 476 // message is returned in the provided buffer. 477 static bool verify_MinHeapFreeRatio(FormatBuffer<80>& err_msg, uintx min_heap_free_ratio); 478 479 // Verifies that the given value will fit as a MaxHeapFreeRatio. If not, an error 480 // message is returned in the provided buffer. 481 static bool verify_MaxHeapFreeRatio(FormatBuffer<80>& err_msg, uintx max_heap_free_ratio); 482 483 // Check for consistency in the selection of the garbage collector. 484 static bool check_gc_consistency_user(); // Check user-selected gc 485 static inline bool check_gc_consistency_ergo(); // Check ergonomic-selected gc 486 static void check_deprecated_gc_flags(); 487 // Check consistency or otherwise of VM argument settings 488 static bool check_vm_args_consistency(); 489 // Check stack pages settings 490 static bool check_stack_pages(); 491 // Used by os_solaris 492 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized); 493 494 static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; } 495 // Return the maximum size a heap with compressed oops can take 496 static size_t max_heap_for_compressed_oops(); 497 498 // return a char* array containing all options 499 static char** jvm_flags_array() { return _jvm_flags_array; } 500 static char** jvm_args_array() { return _jvm_args_array; } 501 static int num_jvm_flags() { return _num_jvm_flags; } 502 static int num_jvm_args() { return _num_jvm_args; } 503 // return the arguments passed to the Java application 504 static const char* java_command() { return _java_command; } 505 506 // print jvm_flags, jvm_args and java_command 507 static void print_on(outputStream* st); 508 509 // convenient methods to obtain / print jvm_flags and jvm_args 510 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); } 511 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); } 512 static void print_jvm_flags_on(outputStream* st); 513 static void print_jvm_args_on(outputStream* st); 514 515 // -Dkey=value flags 516 static SystemProperty* system_properties() { return _system_properties; } 517 static const char* get_property(const char* key); 518 519 // -Djava.vendor.url.bug 520 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; } 521 522 // -Dsun.java.launcher 523 static const char* sun_java_launcher() { return _sun_java_launcher; } 524 // Was VM created by a Java launcher? 525 static bool created_by_java_launcher(); 526 // -Dsun.java.launcher.is_altjvm 527 static bool sun_java_launcher_is_altjvm(); 528 // -Dsun.java.launcher.pid 529 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; } 530 531 // -Xloggc:<file>, if not specified will be NULL 532 static const char* gc_log_filename() { return _gc_log_filename; } 533 534 // -Xprof 535 static bool has_profile() { return _has_profile; } 536 537 // -Xms 538 static uintx min_heap_size() { return _min_heap_size; } 539 static void set_min_heap_size(uintx v) { _min_heap_size = v; } 540 541 // Returns the original values of -XX:MinHeapFreeRatio and -XX:MaxHeapFreeRatio 542 static uintx min_heap_free_ratio() { return _min_heap_free_ratio; } 543 static uintx max_heap_free_ratio() { return _max_heap_free_ratio; } 544 545 // -Xrun 546 static AgentLibrary* libraries() { return _libraryList.first(); } 547 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); } 548 static void convert_library_to_agent(AgentLibrary* lib) 549 { _libraryList.remove(lib); 550 _agentList.add(lib); } 551 552 // -agentlib -agentpath 553 static AgentLibrary* agents() { return _agentList.first(); } 554 static bool init_agents_at_startup() { return !_agentList.is_empty(); } 555 556 // abort, exit, vfprintf hooks 557 static abort_hook_t abort_hook() { return _abort_hook; } 558 static exit_hook_t exit_hook() { return _exit_hook; } 559 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; } 560 561 static bool GetCheckCompileOnly () { return CheckCompileOnly; } 562 563 static const char* GetSharedArchivePath() { return SharedArchivePath; } 564 565 static bool CompileMethod(char* className, char* methodName) { 566 return 567 methodExists( 568 className, methodName, 569 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods, 570 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses 571 ); 572 } 573 574 // Java launcher properties 575 static void process_sun_java_launcher_properties(JavaVMInitArgs* args); 576 577 // System properties 578 static void init_system_properties(); 579 580 // Update/Initialize System properties after JDK version number is known 581 static void init_version_specific_system_properties(); 582 583 // Property List manipulation 584 static void PropertyList_add(SystemProperty *element); 585 static void PropertyList_add(SystemProperty** plist, SystemProperty *element); 586 static void PropertyList_add(SystemProperty** plist, const char* k, char* v); 587 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 588 PropertyList_unique_add(plist, k, v, false); 589 } 590 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append); 591 static const char* PropertyList_get_value(SystemProperty* plist, const char* key); 592 static int PropertyList_count(SystemProperty* pl); 593 static const char* PropertyList_get_key_at(SystemProperty* pl,int index); 594 static char* PropertyList_get_value_at(SystemProperty* pl,int index); 595 596 // Miscellaneous System property value getter and setters. 597 static void set_dll_dir(char *value) { _sun_boot_library_path->set_value(value); } 598 static void set_java_home(char *value) { _java_home->set_value(value); } 599 static void set_library_path(char *value) { _java_library_path->set_value(value); } 600 static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); } 601 static void set_sysclasspath(char *value) { _sun_boot_class_path->set_value(value); } 602 static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); } 603 static void set_meta_index_path(char* meta_index_path, char* meta_index_dir) { 604 _meta_index_path = meta_index_path; 605 _meta_index_dir = meta_index_dir; 606 } 607 608 static char* get_java_home() { return _java_home->value(); } 609 static char* get_dll_dir() { return _sun_boot_library_path->value(); } 610 static char* get_sysclasspath() { return _sun_boot_class_path->value(); } 611 static char* get_meta_index_path() { return _meta_index_path; } 612 static char* get_meta_index_dir() { return _meta_index_dir; } 613 static char* get_ext_dirs() { return _ext_dirs; } 614 static char* get_appclasspath() { return _java_class_path->value(); } 615 static void fix_appclasspath(); 616 617 618 // Operation modi 619 static Mode mode() { return _mode; } 620 static bool is_interpreter_only() { return mode() == _int; } 621 622 623 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid. 624 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen); 625 }; 626 627 bool Arguments::gc_selected() { 628 return UseConcMarkSweepGC || UseG1GC || UseParallelGC || UseParallelOldGC || UseSerialGC; 629 } 630 631 bool Arguments::check_gc_consistency_ergo() { 632 return check_gc_consistency_user(); 633 } 634 635 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP