1 /* 2 * Copyright (c) 1997, 2009, 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 // Arguments parses the command line and recognizes options 26 27 // Invocation API hook typedefs (these should really be defined in jni.hpp) 28 extern "C" { 29 typedef void (JNICALL *abort_hook_t)(void); 30 typedef void (JNICALL *exit_hook_t)(jint code); 31 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args); 32 } 33 34 // Forward declarations 35 36 class SysClassPath; 37 38 // Element describing System and User (-Dkey=value flags) defined property. 39 40 class SystemProperty: public CHeapObj { 41 private: 42 char* _key; 43 char* _value; 44 SystemProperty* _next; 45 bool _writeable; 46 bool writeable() { return _writeable; } 47 48 public: 49 // Accessors 50 const char* key() const { return _key; } 51 char* value() const { return _value; } 52 SystemProperty* next() const { return _next; } 53 void set_next(SystemProperty* next) { _next = next; } 54 bool set_value(char *value) { 55 if (writeable()) { 56 if (_value != NULL) { 57 FreeHeap(_value); 58 } 59 _value = AllocateHeap(strlen(value)+1); 60 if (_value != NULL) { 61 strcpy(_value, value); 62 } 63 return true; 64 } 65 return false; 66 } 67 68 void append_value(const char *value) { 69 char *sp; 70 size_t len = 0; 71 if (value != NULL) { 72 len = strlen(value); 73 if (_value != NULL) { 74 len += strlen(_value); 75 } 76 sp = AllocateHeap(len+2); 77 if (sp != NULL) { 78 if (_value != NULL) { 79 strcpy(sp, _value); 80 strcat(sp, os::path_separator()); 81 strcat(sp, value); 82 FreeHeap(_value); 83 } else { 84 strcpy(sp, value); 85 } 86 _value = sp; 87 } 88 } 89 } 90 91 // Constructor 92 SystemProperty(const char* key, const char* value, bool writeable) { 93 if (key == NULL) { 94 _key = NULL; 95 } else { 96 _key = AllocateHeap(strlen(key)+1); 97 strcpy(_key, key); 98 } 99 if (value == NULL) { 100 _value = NULL; 101 } else { 102 _value = AllocateHeap(strlen(value)+1); 103 strcpy(_value, value); 104 } 105 _next = NULL; 106 _writeable = writeable; 107 } 108 }; 109 110 111 // For use by -agentlib, -agentpath and -Xrun 112 class AgentLibrary : public CHeapObj { 113 friend class AgentLibraryList; 114 private: 115 char* _name; 116 char* _options; 117 void* _os_lib; 118 bool _is_absolute_path; 119 AgentLibrary* _next; 120 121 public: 122 // Accessors 123 const char* name() const { return _name; } 124 char* options() const { return _options; } 125 bool is_absolute_path() const { return _is_absolute_path; } 126 void* os_lib() const { return _os_lib; } 127 void set_os_lib(void* os_lib) { _os_lib = os_lib; } 128 AgentLibrary* next() const { return _next; } 129 130 // Constructor 131 AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) { 132 _name = AllocateHeap(strlen(name)+1); 133 strcpy(_name, name); 134 if (options == NULL) { 135 _options = NULL; 136 } else { 137 _options = AllocateHeap(strlen(options)+1); 138 strcpy(_options, options); 139 } 140 _is_absolute_path = is_absolute_path; 141 _os_lib = os_lib; 142 _next = NULL; 143 } 144 }; 145 146 // maintain an order of entry list of AgentLibrary 147 class AgentLibraryList VALUE_OBJ_CLASS_SPEC { 148 private: 149 AgentLibrary* _first; 150 AgentLibrary* _last; 151 public: 152 bool is_empty() const { return _first == NULL; } 153 AgentLibrary* first() const { return _first; } 154 155 // add to the end of the list 156 void add(AgentLibrary* lib) { 157 if (is_empty()) { 158 _first = _last = lib; 159 } else { 160 _last->_next = lib; 161 _last = lib; 162 } 163 lib->_next = NULL; 164 } 165 166 // search for and remove a library known to be in the list 167 void remove(AgentLibrary* lib) { 168 AgentLibrary* curr; 169 AgentLibrary* prev = NULL; 170 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) { 171 if (curr == lib) { 172 break; 173 } 174 } 175 assert(curr != NULL, "always should be found"); 176 177 if (curr != NULL) { 178 // it was found, by-pass this library 179 if (prev == NULL) { 180 _first = curr->_next; 181 } else { 182 prev->_next = curr->_next; 183 } 184 if (curr == _last) { 185 _last = prev; 186 } 187 curr->_next = NULL; 188 } 189 } 190 191 AgentLibraryList() { 192 _first = NULL; 193 _last = NULL; 194 } 195 }; 196 197 198 class Arguments : AllStatic { 199 friend class VMStructs; 200 friend class JvmtiExport; 201 public: 202 // Operation modi 203 enum Mode { 204 _int, // corresponds to -Xint 205 _mixed, // corresponds to -Xmixed 206 _comp // corresponds to -Xcomp 207 }; 208 209 enum ArgsRange { 210 arg_unreadable = -3, 211 arg_too_small = -2, 212 arg_too_big = -1, 213 arg_in_range = 0 214 }; 215 216 private: 217 218 // an array containing all flags specified in the .hotspotrc file 219 static char** _jvm_flags_array; 220 static int _num_jvm_flags; 221 // an array containing all jvm arguments specified in the command line 222 static char** _jvm_args_array; 223 static int _num_jvm_args; 224 // string containing all java command (class/jarfile name and app args) 225 static char* _java_command; 226 227 // Property list 228 static SystemProperty* _system_properties; 229 230 // Quick accessor to System properties in the list: 231 static SystemProperty *_java_ext_dirs; 232 static SystemProperty *_java_endorsed_dirs; 233 static SystemProperty *_sun_boot_library_path; 234 static SystemProperty *_java_library_path; 235 static SystemProperty *_java_home; 236 static SystemProperty *_java_class_path; 237 static SystemProperty *_sun_boot_class_path; 238 239 // Meta-index for knowing what packages are in the boot class path 240 static char* _meta_index_path; 241 static char* _meta_index_dir; 242 243 // java.vendor.url.bug, bug reporting URL for fatal errors. 244 static const char* _java_vendor_url_bug; 245 246 // sun.java.launcher, private property to provide information about 247 // java/gamma launcher 248 static const char* _sun_java_launcher; 249 250 // sun.java.launcher.pid, private property 251 static int _sun_java_launcher_pid; 252 253 // Option flags 254 static bool _has_profile; 255 static bool _has_alloc_profile; 256 static const char* _gc_log_filename; 257 static uintx _min_heap_size; 258 259 // -Xrun arguments 260 static AgentLibraryList _libraryList; 261 static void add_init_library(const char* name, char* options) 262 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); } 263 264 // -agentlib and -agentpath arguments 265 static AgentLibraryList _agentList; 266 static void add_init_agent(const char* name, char* options, bool absolute_path) 267 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); } 268 269 // Late-binding agents not started via arguments 270 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) 271 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); } 272 273 // Operation modi 274 static Mode _mode; 275 static void set_mode_flags(Mode mode); 276 static bool _java_compiler; 277 static void set_java_compiler(bool arg) { _java_compiler = arg; } 278 static bool java_compiler() { return _java_compiler; } 279 280 // -Xdebug flag 281 static bool _xdebug_mode; 282 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; } 283 static bool xdebug_mode() { return _xdebug_mode; } 284 285 // Used to save default settings 286 static bool _AlwaysCompileLoopMethods; 287 static bool _UseOnStackReplacement; 288 static bool _BackgroundCompilation; 289 static bool _ClipInlining; 290 static bool _CIDynamicCompilePriority; 291 static intx _Tier2CompileThreshold; 292 293 // CMS/ParNew garbage collectors 294 static void set_parnew_gc_flags(); 295 static void set_cms_and_parnew_gc_flags(); 296 // UseParallel[Old]GC 297 static void set_parallel_gc_flags(); 298 // Garbage-First (UseG1GC) 299 static void set_g1_gc_flags(); 300 // GC ergonomics 301 static void set_ergonomics_flags(); 302 // Setup heap size 303 static void set_heap_size(); 304 // Based on automatic selection criteria, should the 305 // low pause collector be used. 306 static bool should_auto_select_low_pause_collector(); 307 308 // Bytecode rewriting 309 static void set_bytecode_flags(); 310 311 // Invocation API hooks 312 static abort_hook_t _abort_hook; 313 static exit_hook_t _exit_hook; 314 static vfprintf_hook_t _vfprintf_hook; 315 316 // System properties 317 static bool add_property(const char* prop); 318 319 // Aggressive optimization flags. 320 static void set_aggressive_opts_flags(); 321 322 // Argument parsing 323 static void do_pd_flag_adjustments(); 324 static bool parse_argument(const char* arg, FlagValueOrigin origin); 325 static bool process_argument(const char* arg, jboolean ignore_unrecognized, FlagValueOrigin origin); 326 static void process_java_launcher_argument(const char*, void*); 327 static void process_java_compiler_argument(char* arg); 328 static jint parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p); 329 static jint parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p); 330 static jint parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p); 331 static jint parse_vm_init_args(const JavaVMInitArgs* args); 332 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, FlagValueOrigin origin); 333 static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required); 334 static bool is_bad_option(const JavaVMOption* option, jboolean ignore, 335 const char* option_type); 336 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) { 337 return is_bad_option(option, ignore, NULL); 338 } 339 static bool verify_interval(uintx val, uintx min, 340 uintx max, const char* name); 341 static bool verify_percentage(uintx value, const char* name); 342 static void describe_range_error(ArgsRange errcode); 343 static ArgsRange check_memory_size(julong size, julong min_size); 344 static ArgsRange parse_memory_size(const char* s, julong* long_arg, 345 julong min_size); 346 // Parse a string for a unsigned integer. Returns true if value 347 // is an unsigned integer greater than or equal to the minimum 348 // parameter passed and returns the value in uintx_arg. Returns 349 // false otherwise, with uintx_arg undefined. 350 static bool parse_uintx(const char* value, uintx* uintx_arg, 351 uintx min_size); 352 353 // methods to build strings from individual args 354 static void build_jvm_args(const char* arg); 355 static void build_jvm_flags(const char* arg); 356 static void add_string(char*** bldarray, int* count, const char* arg); 357 static const char* build_resource_string(char** args, int count); 358 359 static bool methodExists( 360 char* className, char* methodName, 361 int classesNum, char** classes, bool* allMethods, 362 int methodsNum, char** methods, bool* allClasses 363 ); 364 365 static void parseOnlyLine( 366 const char* line, 367 short* classesNum, short* classesMax, char*** classes, bool** allMethods, 368 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses 369 ); 370 371 // Returns true if the string s is in the list of flags that have recently 372 // been made obsolete. If we detect one of these flags on the command 373 // line, instead of failing we print a warning message and ignore the 374 // flag. This gives the user a release or so to stop using the flag. 375 static bool is_newly_obsolete(const char* s, JDK_Version* buffer); 376 377 static short CompileOnlyClassesNum; 378 static short CompileOnlyClassesMax; 379 static char** CompileOnlyClasses; 380 static bool* CompileOnlyAllMethods; 381 382 static short CompileOnlyMethodsNum; 383 static short CompileOnlyMethodsMax; 384 static char** CompileOnlyMethods; 385 static bool* CompileOnlyAllClasses; 386 387 static short InterpretOnlyClassesNum; 388 static short InterpretOnlyClassesMax; 389 static char** InterpretOnlyClasses; 390 static bool* InterpretOnlyAllMethods; 391 392 static bool CheckCompileOnly; 393 394 static char* SharedArchivePath; 395 396 public: 397 // Parses the arguments 398 static jint parse(const JavaVMInitArgs* args); 399 // Check for consistency in the selection of the garbage collector. 400 static bool check_gc_consistency(); 401 // Check consistecy or otherwise of VM argument settings 402 static bool check_vm_args_consistency(); 403 // Used by os_solaris 404 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized); 405 406 // return a char* array containing all options 407 static char** jvm_flags_array() { return _jvm_flags_array; } 408 static char** jvm_args_array() { return _jvm_args_array; } 409 static int num_jvm_flags() { return _num_jvm_flags; } 410 static int num_jvm_args() { return _num_jvm_args; } 411 // return the arguments passed to the Java application 412 static const char* java_command() { return _java_command; } 413 414 // print jvm_flags, jvm_args and java_command 415 static void print_on(outputStream* st); 416 417 // convenient methods to obtain / print jvm_flags and jvm_args 418 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); } 419 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); } 420 static void print_jvm_flags_on(outputStream* st); 421 static void print_jvm_args_on(outputStream* st); 422 423 // -Dkey=value flags 424 static SystemProperty* system_properties() { return _system_properties; } 425 static const char* get_property(const char* key); 426 427 // -Djava.vendor.url.bug 428 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; } 429 430 // -Dsun.java.launcher 431 static const char* sun_java_launcher() { return _sun_java_launcher; } 432 // Was VM created by a Java launcher? 433 static bool created_by_java_launcher(); 434 // -Dsun.java.launcher.pid 435 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; } 436 437 // -Xloggc:<file>, if not specified will be NULL 438 static const char* gc_log_filename() { return _gc_log_filename; } 439 440 // -Xprof/-Xaprof 441 static bool has_profile() { return _has_profile; } 442 static bool has_alloc_profile() { return _has_alloc_profile; } 443 444 // -Xms, -Xmx 445 static uintx min_heap_size() { return _min_heap_size; } 446 static void set_min_heap_size(uintx v) { _min_heap_size = v; } 447 448 // -Xrun 449 static AgentLibrary* libraries() { return _libraryList.first(); } 450 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); } 451 static void convert_library_to_agent(AgentLibrary* lib) 452 { _libraryList.remove(lib); 453 _agentList.add(lib); } 454 455 // -agentlib -agentpath 456 static AgentLibrary* agents() { return _agentList.first(); } 457 static bool init_agents_at_startup() { return !_agentList.is_empty(); } 458 459 // abort, exit, vfprintf hooks 460 static abort_hook_t abort_hook() { return _abort_hook; } 461 static exit_hook_t exit_hook() { return _exit_hook; } 462 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; } 463 464 static bool GetCheckCompileOnly () { return CheckCompileOnly; } 465 466 static const char* GetSharedArchivePath() { return SharedArchivePath; } 467 468 static bool CompileMethod(char* className, char* methodName) { 469 return 470 methodExists( 471 className, methodName, 472 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods, 473 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses 474 ); 475 } 476 477 // Java launcher properties 478 static void process_sun_java_launcher_properties(JavaVMInitArgs* args); 479 480 // System properties 481 static void init_system_properties(); 482 483 // Property List manipulation 484 static void PropertyList_add(SystemProperty** plist, SystemProperty *element); 485 static void PropertyList_add(SystemProperty** plist, const char* k, char* v); 486 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 487 PropertyList_unique_add(plist, k, v, false); 488 } 489 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append); 490 static const char* PropertyList_get_value(SystemProperty* plist, const char* key); 491 static int PropertyList_count(SystemProperty* pl); 492 static const char* PropertyList_get_key_at(SystemProperty* pl,int index); 493 static char* PropertyList_get_value_at(SystemProperty* pl,int index); 494 495 // Miscellaneous System property value getter and setters. 496 static void set_dll_dir(char *value) { _sun_boot_library_path->set_value(value); } 497 static void set_java_home(char *value) { _java_home->set_value(value); } 498 static void set_library_path(char *value) { _java_library_path->set_value(value); } 499 static void set_ext_dirs(char *value) { _java_ext_dirs->set_value(value); } 500 static void set_endorsed_dirs(char *value) { _java_endorsed_dirs->set_value(value); } 501 static void set_sysclasspath(char *value) { _sun_boot_class_path->set_value(value); } 502 static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); } 503 static void set_meta_index_path(char* meta_index_path, char* meta_index_dir) { 504 _meta_index_path = meta_index_path; 505 _meta_index_dir = meta_index_dir; 506 } 507 508 static char *get_java_home() { return _java_home->value(); } 509 static char *get_dll_dir() { return _sun_boot_library_path->value(); } 510 static char *get_endorsed_dir() { return _java_endorsed_dirs->value(); } 511 static char *get_sysclasspath() { return _sun_boot_class_path->value(); } 512 static char* get_meta_index_path() { return _meta_index_path; } 513 static char* get_meta_index_dir() { return _meta_index_dir; } 514 515 // Operation modi 516 static Mode mode() { return _mode; } 517 518 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid. 519 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen); 520 521 #ifdef KERNEL 522 // For java kernel vm, return property string for kernel properties. 523 static char *get_kernel_properties(); 524 #endif // KERNEL 525 };