1 /* 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_arguments.cpp.incl" 27 28 #define DEFAULT_VENDOR_URL_BUG "http://java.sun.com/webapps/bugreport/crash.jsp" 29 #define DEFAULT_JAVA_LAUNCHER "generic" 30 31 char** Arguments::_jvm_flags_array = NULL; 32 int Arguments::_num_jvm_flags = 0; 33 char** Arguments::_jvm_args_array = NULL; 34 int Arguments::_num_jvm_args = 0; 35 char* Arguments::_java_command = NULL; 36 SystemProperty* Arguments::_system_properties = NULL; 37 const char* Arguments::_gc_log_filename = NULL; 38 bool Arguments::_has_profile = false; 39 bool Arguments::_has_alloc_profile = false; 40 uintx Arguments::_initial_heap_size = 0; 41 uintx Arguments::_min_heap_size = 0; 42 Arguments::Mode Arguments::_mode = _mixed; 43 bool Arguments::_java_compiler = false; 44 bool Arguments::_xdebug_mode = false; 45 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 46 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 47 int Arguments::_sun_java_launcher_pid = -1; 48 49 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) 50 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 51 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 52 bool Arguments::_BackgroundCompilation = BackgroundCompilation; 53 bool Arguments::_ClipInlining = ClipInlining; 54 intx Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 55 56 char* Arguments::SharedArchivePath = NULL; 57 58 AgentLibraryList Arguments::_libraryList; 59 AgentLibraryList Arguments::_agentList; 60 61 abort_hook_t Arguments::_abort_hook = NULL; 62 exit_hook_t Arguments::_exit_hook = NULL; 63 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 64 65 66 SystemProperty *Arguments::_java_ext_dirs = NULL; 67 SystemProperty *Arguments::_java_endorsed_dirs = NULL; 68 SystemProperty *Arguments::_sun_boot_library_path = NULL; 69 SystemProperty *Arguments::_java_library_path = NULL; 70 SystemProperty *Arguments::_java_home = NULL; 71 SystemProperty *Arguments::_java_class_path = NULL; 72 SystemProperty *Arguments::_sun_boot_class_path = NULL; 73 74 char* Arguments::_meta_index_path = NULL; 75 char* Arguments::_meta_index_dir = NULL; 76 77 static bool force_client_mode = false; 78 79 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string 80 81 static bool match_option(const JavaVMOption *option, const char* name, 82 const char** tail) { 83 int len = (int)strlen(name); 84 if (strncmp(option->optionString, name, len) == 0) { 85 *tail = option->optionString + len; 86 return true; 87 } else { 88 return false; 89 } 90 } 91 92 static void logOption(const char* opt) { 93 if (PrintVMOptions) { 94 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 95 } 96 } 97 98 // Process java launcher properties. 99 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 100 // See if sun.java.launcher or sun.java.launcher.pid is defined. 101 // Must do this before setting up other system properties, 102 // as some of them may depend on launcher type. 103 for (int index = 0; index < args->nOptions; index++) { 104 const JavaVMOption* option = args->options + index; 105 const char* tail; 106 107 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 108 process_java_launcher_argument(tail, option->extraInfo); 109 continue; 110 } 111 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 112 _sun_java_launcher_pid = atoi(tail); 113 continue; 114 } 115 } 116 } 117 118 // Initialize system properties key and value. 119 void Arguments::init_system_properties() { 120 121 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.version", "1.0", false)); 122 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 123 "Java Virtual Machine Specification", false)); 124 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.vendor", 125 "Sun Microsystems Inc.", false)); 126 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 127 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 128 PropertyList_add(&_system_properties, new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 129 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 130 131 // following are JVMTI agent writeable properties. 132 // Properties values are set to NULL and they are 133 // os specific they are initialized in os::init_system_properties_values(). 134 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); 135 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); 136 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 137 _java_library_path = new SystemProperty("java.library.path", NULL, true); 138 _java_home = new SystemProperty("java.home", NULL, true); 139 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); 140 141 _java_class_path = new SystemProperty("java.class.path", "", true); 142 143 // Add to System Property list. 144 PropertyList_add(&_system_properties, _java_ext_dirs); 145 PropertyList_add(&_system_properties, _java_endorsed_dirs); 146 PropertyList_add(&_system_properties, _sun_boot_library_path); 147 PropertyList_add(&_system_properties, _java_library_path); 148 PropertyList_add(&_system_properties, _java_home); 149 PropertyList_add(&_system_properties, _java_class_path); 150 PropertyList_add(&_system_properties, _sun_boot_class_path); 151 152 // Set OS specific system properties values 153 os::init_system_properties_values(); 154 } 155 156 /** 157 * Provide a slightly more user-friendly way of eliminating -XX flags. 158 * When a flag is eliminated, it can be added to this list in order to 159 * continue accepting this flag on the command-line, while issuing a warning 160 * and ignoring the value. Once the JDK version reaches the 'accept_until' 161 * limit, we flatly refuse to admit the existence of the flag. This allows 162 * a flag to die correctly over JDK releases using HSX. 163 */ 164 typedef struct { 165 const char* name; 166 JDK_Version obsoleted_in; // when the flag went away 167 JDK_Version accept_until; // which version to start denying the existence 168 } ObsoleteFlag; 169 170 static ObsoleteFlag obsolete_jvm_flags[] = { 171 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 172 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 173 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 174 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 175 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 176 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 177 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 178 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 179 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 180 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 181 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 182 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 183 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 184 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, 185 { NULL, JDK_Version(0), JDK_Version(0) } 186 }; 187 188 // Returns true if the flag is obsolete and fits into the range specified 189 // for being ignored. In the case that the flag is ignored, the 'version' 190 // value is filled in with the version number when the flag became 191 // obsolete so that that value can be displayed to the user. 192 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { 193 int i = 0; 194 assert(version != NULL, "Must provide a version buffer"); 195 while (obsolete_jvm_flags[i].name != NULL) { 196 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; 197 // <flag>=xxx form 198 // [-|+]<flag> form 199 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || 200 ((s[0] == '+' || s[0] == '-') && 201 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { 202 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { 203 *version = flag_status.obsoleted_in; 204 return true; 205 } 206 } 207 i++; 208 } 209 return false; 210 } 211 212 // Constructs the system class path (aka boot class path) from the following 213 // components, in order: 214 // 215 // prefix // from -Xbootclasspath/p:... 216 // endorsed // the expansion of -Djava.endorsed.dirs=... 217 // base // from os::get_system_properties() or -Xbootclasspath= 218 // suffix // from -Xbootclasspath/a:... 219 // 220 // java.endorsed.dirs is a list of directories; any jar or zip files in the 221 // directories are added to the sysclasspath just before the base. 222 // 223 // This could be AllStatic, but it isn't needed after argument processing is 224 // complete. 225 class SysClassPath: public StackObj { 226 public: 227 SysClassPath(const char* base); 228 ~SysClassPath(); 229 230 inline void set_base(const char* base); 231 inline void add_prefix(const char* prefix); 232 inline void add_suffix_to_prefix(const char* suffix); 233 inline void add_suffix(const char* suffix); 234 inline void reset_path(const char* base); 235 236 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs 237 // property. Must be called after all command-line arguments have been 238 // processed (in particular, -Djava.endorsed.dirs=...) and before calling 239 // combined_path(). 240 void expand_endorsed(); 241 242 inline const char* get_base() const { return _items[_scp_base]; } 243 inline const char* get_prefix() const { return _items[_scp_prefix]; } 244 inline const char* get_suffix() const { return _items[_scp_suffix]; } 245 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } 246 247 // Combine all the components into a single c-heap-allocated string; caller 248 // must free the string if/when no longer needed. 249 char* combined_path(); 250 251 private: 252 // Utility routines. 253 static char* add_to_path(const char* path, const char* str, bool prepend); 254 static char* add_jars_to_path(char* path, const char* directory); 255 256 inline void reset_item_at(int index); 257 258 // Array indices for the items that make up the sysclasspath. All except the 259 // base are allocated in the C heap and freed by this class. 260 enum { 261 _scp_prefix, // from -Xbootclasspath/p:... 262 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... 263 _scp_base, // the default sysclasspath 264 _scp_suffix, // from -Xbootclasspath/a:... 265 _scp_nitems // the number of items, must be last. 266 }; 267 268 const char* _items[_scp_nitems]; 269 DEBUG_ONLY(bool _expansion_done;) 270 }; 271 272 SysClassPath::SysClassPath(const char* base) { 273 memset(_items, 0, sizeof(_items)); 274 _items[_scp_base] = base; 275 DEBUG_ONLY(_expansion_done = false;) 276 } 277 278 SysClassPath::~SysClassPath() { 279 // Free everything except the base. 280 for (int i = 0; i < _scp_nitems; ++i) { 281 if (i != _scp_base) reset_item_at(i); 282 } 283 DEBUG_ONLY(_expansion_done = false;) 284 } 285 286 inline void SysClassPath::set_base(const char* base) { 287 _items[_scp_base] = base; 288 } 289 290 inline void SysClassPath::add_prefix(const char* prefix) { 291 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); 292 } 293 294 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { 295 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); 296 } 297 298 inline void SysClassPath::add_suffix(const char* suffix) { 299 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); 300 } 301 302 inline void SysClassPath::reset_item_at(int index) { 303 assert(index < _scp_nitems && index != _scp_base, "just checking"); 304 if (_items[index] != NULL) { 305 FREE_C_HEAP_ARRAY(char, _items[index]); 306 _items[index] = NULL; 307 } 308 } 309 310 inline void SysClassPath::reset_path(const char* base) { 311 // Clear the prefix and suffix. 312 reset_item_at(_scp_prefix); 313 reset_item_at(_scp_suffix); 314 set_base(base); 315 } 316 317 //------------------------------------------------------------------------------ 318 319 void SysClassPath::expand_endorsed() { 320 assert(_items[_scp_endorsed] == NULL, "can only be called once."); 321 322 const char* path = Arguments::get_property("java.endorsed.dirs"); 323 if (path == NULL) { 324 path = Arguments::get_endorsed_dir(); 325 assert(path != NULL, "no default for java.endorsed.dirs"); 326 } 327 328 char* expanded_path = NULL; 329 const char separator = *os::path_separator(); 330 const char* const end = path + strlen(path); 331 while (path < end) { 332 const char* tmp_end = strchr(path, separator); 333 if (tmp_end == NULL) { 334 expanded_path = add_jars_to_path(expanded_path, path); 335 path = end; 336 } else { 337 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); 338 memcpy(dirpath, path, tmp_end - path); 339 dirpath[tmp_end - path] = '\0'; 340 expanded_path = add_jars_to_path(expanded_path, dirpath); 341 FREE_C_HEAP_ARRAY(char, dirpath); 342 path = tmp_end + 1; 343 } 344 } 345 _items[_scp_endorsed] = expanded_path; 346 DEBUG_ONLY(_expansion_done = true;) 347 } 348 349 // Combine the bootclasspath elements, some of which may be null, into a single 350 // c-heap-allocated string. 351 char* SysClassPath::combined_path() { 352 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); 353 assert(_expansion_done, "must call expand_endorsed() first."); 354 355 size_t lengths[_scp_nitems]; 356 size_t total_len = 0; 357 358 const char separator = *os::path_separator(); 359 360 // Get the lengths. 361 int i; 362 for (i = 0; i < _scp_nitems; ++i) { 363 if (_items[i] != NULL) { 364 lengths[i] = strlen(_items[i]); 365 // Include space for the separator char (or a NULL for the last item). 366 total_len += lengths[i] + 1; 367 } 368 } 369 assert(total_len > 0, "empty sysclasspath not allowed"); 370 371 // Copy the _items to a single string. 372 char* cp = NEW_C_HEAP_ARRAY(char, total_len); 373 char* cp_tmp = cp; 374 for (i = 0; i < _scp_nitems; ++i) { 375 if (_items[i] != NULL) { 376 memcpy(cp_tmp, _items[i], lengths[i]); 377 cp_tmp += lengths[i]; 378 *cp_tmp++ = separator; 379 } 380 } 381 *--cp_tmp = '\0'; // Replace the extra separator. 382 return cp; 383 } 384 385 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 386 char* 387 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { 388 char *cp; 389 390 assert(str != NULL, "just checking"); 391 if (path == NULL) { 392 size_t len = strlen(str) + 1; 393 cp = NEW_C_HEAP_ARRAY(char, len); 394 memcpy(cp, str, len); // copy the trailing null 395 } else { 396 const char separator = *os::path_separator(); 397 size_t old_len = strlen(path); 398 size_t str_len = strlen(str); 399 size_t len = old_len + str_len + 2; 400 401 if (prepend) { 402 cp = NEW_C_HEAP_ARRAY(char, len); 403 char* cp_tmp = cp; 404 memcpy(cp_tmp, str, str_len); 405 cp_tmp += str_len; 406 *cp_tmp = separator; 407 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null 408 FREE_C_HEAP_ARRAY(char, path); 409 } else { 410 cp = REALLOC_C_HEAP_ARRAY(char, path, len); 411 char* cp_tmp = cp + old_len; 412 *cp_tmp = separator; 413 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null 414 } 415 } 416 return cp; 417 } 418 419 // Scan the directory and append any jar or zip files found to path. 420 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 421 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { 422 DIR* dir = os::opendir(directory); 423 if (dir == NULL) return path; 424 425 char dir_sep[2] = { '\0', '\0' }; 426 size_t directory_len = strlen(directory); 427 const char fileSep = *os::file_separator(); 428 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; 429 430 /* Scan the directory for jars/zips, appending them to path. */ 431 struct dirent *entry; 432 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); 433 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 434 const char* name = entry->d_name; 435 const char* ext = name + strlen(name) - 4; 436 bool isJarOrZip = ext > name && 437 (os::file_name_strcmp(ext, ".jar") == 0 || 438 os::file_name_strcmp(ext, ".zip") == 0); 439 if (isJarOrZip) { 440 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); 441 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); 442 path = add_to_path(path, jarpath, false); 443 FREE_C_HEAP_ARRAY(char, jarpath); 444 } 445 } 446 FREE_C_HEAP_ARRAY(char, dbuf); 447 os::closedir(dir); 448 return path; 449 } 450 451 // Parses a memory size specification string. 452 static bool atomull(const char *s, julong* result) { 453 julong n = 0; 454 int args_read = sscanf(s, os::julong_format_specifier(), &n); 455 if (args_read != 1) { 456 return false; 457 } 458 while (*s != '\0' && isdigit(*s)) { 459 s++; 460 } 461 // 4705540: illegal if more characters are found after the first non-digit 462 if (strlen(s) > 1) { 463 return false; 464 } 465 switch (*s) { 466 case 'T': case 't': 467 *result = n * G * K; 468 // Check for overflow. 469 if (*result/((julong)G * K) != n) return false; 470 return true; 471 case 'G': case 'g': 472 *result = n * G; 473 if (*result/G != n) return false; 474 return true; 475 case 'M': case 'm': 476 *result = n * M; 477 if (*result/M != n) return false; 478 return true; 479 case 'K': case 'k': 480 *result = n * K; 481 if (*result/K != n) return false; 482 return true; 483 case '\0': 484 *result = n; 485 return true; 486 default: 487 return false; 488 } 489 } 490 491 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { 492 if (size < min_size) return arg_too_small; 493 // Check that size will fit in a size_t (only relevant on 32-bit) 494 if (size > max_uintx) return arg_too_big; 495 return arg_in_range; 496 } 497 498 // Describe an argument out of range error 499 void Arguments::describe_range_error(ArgsRange errcode) { 500 switch(errcode) { 501 case arg_too_big: 502 jio_fprintf(defaultStream::error_stream(), 503 "The specified size exceeds the maximum " 504 "representable size.\n"); 505 break; 506 case arg_too_small: 507 case arg_unreadable: 508 case arg_in_range: 509 // do nothing for now 510 break; 511 default: 512 ShouldNotReachHere(); 513 } 514 } 515 516 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { 517 return CommandLineFlags::boolAtPut(name, &value, origin); 518 } 519 520 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { 521 double v; 522 if (sscanf(value, "%lf", &v) != 1) { 523 return false; 524 } 525 526 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { 527 return true; 528 } 529 return false; 530 } 531 532 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { 533 julong v; 534 intx intx_v; 535 bool is_neg = false; 536 // Check the sign first since atomull() parses only unsigned values. 537 if (*value == '-') { 538 if (!CommandLineFlags::intxAt(name, &intx_v)) { 539 return false; 540 } 541 value++; 542 is_neg = true; 543 } 544 if (!atomull(value, &v)) { 545 return false; 546 } 547 intx_v = (intx) v; 548 if (is_neg) { 549 intx_v = -intx_v; 550 } 551 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { 552 return true; 553 } 554 uintx uintx_v = (uintx) v; 555 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { 556 return true; 557 } 558 return false; 559 } 560 561 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { 562 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; 563 // Contract: CommandLineFlags always returns a pointer that needs freeing. 564 FREE_C_HEAP_ARRAY(char, value); 565 return true; 566 } 567 568 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { 569 const char* old_value = ""; 570 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; 571 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 572 size_t new_len = strlen(new_value); 573 const char* value; 574 char* free_this_too = NULL; 575 if (old_len == 0) { 576 value = new_value; 577 } else if (new_len == 0) { 578 value = old_value; 579 } else { 580 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); 581 // each new setting adds another LINE to the switch: 582 sprintf(buf, "%s\n%s", old_value, new_value); 583 value = buf; 584 free_this_too = buf; 585 } 586 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 587 // CommandLineFlags always returns a pointer that needs freeing. 588 FREE_C_HEAP_ARRAY(char, value); 589 if (free_this_too != NULL) { 590 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 591 FREE_C_HEAP_ARRAY(char, free_this_too); 592 } 593 return true; 594 } 595 596 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { 597 598 // range of acceptable characters spelled out for portability reasons 599 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 600 #define BUFLEN 255 601 char name[BUFLEN+1]; 602 char dummy; 603 604 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 605 return set_bool_flag(name, false, origin); 606 } 607 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 608 return set_bool_flag(name, true, origin); 609 } 610 611 char punct; 612 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 613 const char* value = strchr(arg, '=') + 1; 614 Flag* flag = Flag::find_flag(name, strlen(name)); 615 if (flag != NULL && flag->is_ccstr()) { 616 if (flag->ccstr_accumulates()) { 617 return append_to_string_flag(name, value, origin); 618 } else { 619 if (value[0] == '\0') { 620 value = NULL; 621 } 622 return set_string_flag(name, value, origin); 623 } 624 } 625 } 626 627 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 628 const char* value = strchr(arg, '=') + 1; 629 // -XX:Foo:=xxx will reset the string flag to the given value. 630 if (value[0] == '\0') { 631 value = NULL; 632 } 633 return set_string_flag(name, value, origin); 634 } 635 636 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" 637 #define SIGNED_NUMBER_RANGE "[-0123456789]" 638 #define NUMBER_RANGE "[0123456789]" 639 char value[BUFLEN + 1]; 640 char value2[BUFLEN + 1]; 641 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 642 // Looks like a floating-point number -- try again with more lenient format string 643 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 644 return set_fp_numeric_flag(name, value, origin); 645 } 646 } 647 648 #define VALUE_RANGE "[-kmgtKMGT0123456789]" 649 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 650 return set_numeric_flag(name, value, origin); 651 } 652 653 return false; 654 } 655 656 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 657 assert(bldarray != NULL, "illegal argument"); 658 659 if (arg == NULL) { 660 return; 661 } 662 663 int index = *count; 664 665 // expand the array and add arg to the last element 666 (*count)++; 667 if (*bldarray == NULL) { 668 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); 669 } else { 670 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); 671 } 672 (*bldarray)[index] = strdup(arg); 673 } 674 675 void Arguments::build_jvm_args(const char* arg) { 676 add_string(&_jvm_args_array, &_num_jvm_args, arg); 677 } 678 679 void Arguments::build_jvm_flags(const char* arg) { 680 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 681 } 682 683 // utility function to return a string that concatenates all 684 // strings in a given char** array 685 const char* Arguments::build_resource_string(char** args, int count) { 686 if (args == NULL || count == 0) { 687 return NULL; 688 } 689 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator 690 for (int i = 1; i < count; i++) { 691 length += strlen(args[i]) + 1; // add 1 for a space 692 } 693 char* s = NEW_RESOURCE_ARRAY(char, length); 694 strcpy(s, args[0]); 695 for (int j = 1; j < count; j++) { 696 strcat(s, " "); 697 strcat(s, args[j]); 698 } 699 return (const char*) s; 700 } 701 702 void Arguments::print_on(outputStream* st) { 703 st->print_cr("VM Arguments:"); 704 if (num_jvm_flags() > 0) { 705 st->print("jvm_flags: "); print_jvm_flags_on(st); 706 } 707 if (num_jvm_args() > 0) { 708 st->print("jvm_args: "); print_jvm_args_on(st); 709 } 710 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 711 st->print_cr("Launcher Type: %s", _sun_java_launcher); 712 } 713 714 void Arguments::print_jvm_flags_on(outputStream* st) { 715 if (_num_jvm_flags > 0) { 716 for (int i=0; i < _num_jvm_flags; i++) { 717 st->print("%s ", _jvm_flags_array[i]); 718 } 719 st->print_cr(""); 720 } 721 } 722 723 void Arguments::print_jvm_args_on(outputStream* st) { 724 if (_num_jvm_args > 0) { 725 for (int i=0; i < _num_jvm_args; i++) { 726 st->print("%s ", _jvm_args_array[i]); 727 } 728 st->print_cr(""); 729 } 730 } 731 732 bool Arguments::process_argument(const char* arg, 733 jboolean ignore_unrecognized, FlagValueOrigin origin) { 734 735 JDK_Version since = JDK_Version(); 736 737 if (parse_argument(arg, origin)) { 738 // do nothing 739 } else if (is_newly_obsolete(arg, &since)) { 740 enum { bufsize = 256 }; 741 char buffer[bufsize]; 742 since.to_string(buffer, bufsize); 743 jio_fprintf(defaultStream::error_stream(), 744 "Warning: The flag %s has been EOL'd as of %s and will" 745 " be ignored\n", arg, buffer); 746 } else { 747 if (!ignore_unrecognized) { 748 jio_fprintf(defaultStream::error_stream(), 749 "Unrecognized VM option '%s'\n", arg); 750 // allow for commandline "commenting out" options like -XX:#+Verbose 751 if (strlen(arg) == 0 || arg[0] != '#') { 752 return false; 753 } 754 } 755 } 756 return true; 757 } 758 759 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 760 FILE* stream = fopen(file_name, "rb"); 761 if (stream == NULL) { 762 if (should_exist) { 763 jio_fprintf(defaultStream::error_stream(), 764 "Could not open settings file %s\n", file_name); 765 return false; 766 } else { 767 return true; 768 } 769 } 770 771 char token[1024]; 772 int pos = 0; 773 774 bool in_white_space = true; 775 bool in_comment = false; 776 bool in_quote = false; 777 char quote_c = 0; 778 bool result = true; 779 780 int c = getc(stream); 781 while(c != EOF) { 782 if (in_white_space) { 783 if (in_comment) { 784 if (c == '\n') in_comment = false; 785 } else { 786 if (c == '#') in_comment = true; 787 else if (!isspace(c)) { 788 in_white_space = false; 789 token[pos++] = c; 790 } 791 } 792 } else { 793 if (c == '\n' || (!in_quote && isspace(c))) { 794 // token ends at newline, or at unquoted whitespace 795 // this allows a way to include spaces in string-valued options 796 token[pos] = '\0'; 797 logOption(token); 798 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); 799 build_jvm_flags(token); 800 pos = 0; 801 in_white_space = true; 802 in_quote = false; 803 } else if (!in_quote && (c == '\'' || c == '"')) { 804 in_quote = true; 805 quote_c = c; 806 } else if (in_quote && (c == quote_c)) { 807 in_quote = false; 808 } else { 809 token[pos++] = c; 810 } 811 } 812 c = getc(stream); 813 } 814 if (pos > 0) { 815 token[pos] = '\0'; 816 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); 817 build_jvm_flags(token); 818 } 819 fclose(stream); 820 return result; 821 } 822 823 //============================================================================================================= 824 // Parsing of properties (-D) 825 826 const char* Arguments::get_property(const char* key) { 827 return PropertyList_get_value(system_properties(), key); 828 } 829 830 bool Arguments::add_property(const char* prop) { 831 const char* eq = strchr(prop, '='); 832 char* key; 833 // ns must be static--its address may be stored in a SystemProperty object. 834 const static char ns[1] = {0}; 835 char* value = (char *)ns; 836 837 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); 838 key = AllocateHeap(key_len + 1, "add_property"); 839 strncpy(key, prop, key_len); 840 key[key_len] = '\0'; 841 842 if (eq != NULL) { 843 size_t value_len = strlen(prop) - key_len - 1; 844 value = AllocateHeap(value_len + 1, "add_property"); 845 strncpy(value, &prop[key_len + 1], value_len + 1); 846 } 847 848 if (strcmp(key, "java.compiler") == 0) { 849 process_java_compiler_argument(value); 850 FreeHeap(key); 851 if (eq != NULL) { 852 FreeHeap(value); 853 } 854 return true; 855 } else if (strcmp(key, "sun.java.command") == 0) { 856 _java_command = value; 857 858 // don't add this property to the properties exposed to the java application 859 FreeHeap(key); 860 return true; 861 } else if (strcmp(key, "sun.java.launcher.pid") == 0) { 862 // launcher.pid property is private and is processed 863 // in process_sun_java_launcher_properties(); 864 // the sun.java.launcher property is passed on to the java application 865 FreeHeap(key); 866 if (eq != NULL) { 867 FreeHeap(value); 868 } 869 return true; 870 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 871 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 872 // its value without going through the property list or making a Java call. 873 _java_vendor_url_bug = value; 874 } else if (strcmp(key, "sun.boot.library.path") == 0) { 875 PropertyList_unique_add(&_system_properties, key, value, true); 876 return true; 877 } 878 // Create new property and add at the end of the list 879 PropertyList_unique_add(&_system_properties, key, value); 880 return true; 881 } 882 883 //=========================================================================================================== 884 // Setting int/mixed/comp mode flags 885 886 void Arguments::set_mode_flags(Mode mode) { 887 // Set up default values for all flags. 888 // If you add a flag to any of the branches below, 889 // add a default value for it here. 890 set_java_compiler(false); 891 _mode = mode; 892 893 // Ensure Agent_OnLoad has the correct initial values. 894 // This may not be the final mode; mode may change later in onload phase. 895 PropertyList_unique_add(&_system_properties, "java.vm.info", 896 (char*)Abstract_VM_Version::vm_info_string(), false); 897 898 UseInterpreter = true; 899 UseCompiler = true; 900 UseLoopCounter = true; 901 902 // Default values may be platform/compiler dependent - 903 // use the saved values 904 ClipInlining = Arguments::_ClipInlining; 905 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 906 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 907 BackgroundCompilation = Arguments::_BackgroundCompilation; 908 Tier2CompileThreshold = Arguments::_Tier2CompileThreshold; 909 910 // Change from defaults based on mode 911 switch (mode) { 912 default: 913 ShouldNotReachHere(); 914 break; 915 case _int: 916 UseCompiler = false; 917 UseLoopCounter = false; 918 AlwaysCompileLoopMethods = false; 919 UseOnStackReplacement = false; 920 break; 921 case _mixed: 922 // same as default 923 break; 924 case _comp: 925 UseInterpreter = false; 926 BackgroundCompilation = false; 927 ClipInlining = false; 928 break; 929 } 930 } 931 932 // Conflict: required to use shared spaces (-Xshare:on), but 933 // incompatible command line options were chosen. 934 935 static void no_shared_spaces() { 936 if (RequireSharedSpaces) { 937 jio_fprintf(defaultStream::error_stream(), 938 "Class data sharing is inconsistent with other specified options.\n"); 939 vm_exit_during_initialization("Unable to use shared archive.", NULL); 940 } else { 941 FLAG_SET_DEFAULT(UseSharedSpaces, false); 942 } 943 } 944 945 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC 946 // if it's not explictly set or unset. If the user has chosen 947 // UseParNewGC and not explicitly set ParallelGCThreads we 948 // set it, unless this is a single cpu machine. 949 void Arguments::set_parnew_gc_flags() { 950 assert(!UseSerialGC && !UseParallelGC && !UseG1GC, 951 "control point invariant"); 952 assert(UseParNewGC, "Error"); 953 954 // Turn off AdaptiveSizePolicy by default for parnew until it is 955 // complete. 956 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { 957 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 958 } 959 960 if (ParallelGCThreads == 0) { 961 FLAG_SET_DEFAULT(ParallelGCThreads, 962 Abstract_VM_Version::parallel_worker_threads()); 963 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 964 FLAG_SET_DEFAULT(UseParNewGC, false); 965 } 966 } 967 if (!UseParNewGC) { 968 FLAG_SET_DEFAULT(ParallelGCThreads, 0); 969 } else { 970 no_shared_spaces(); 971 972 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, 973 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 974 // we set them to 1024 and 1024. 975 // See CR 6362902. 976 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 977 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 978 } 979 if (FLAG_IS_DEFAULT(OldPLABSize)) { 980 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 981 } 982 983 // AlwaysTenure flag should make ParNew to promote all at first collection. 984 // See CR 6362902. 985 if (AlwaysTenure) { 986 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); 987 } 988 // When using compressed oops, we use local overflow stacks, 989 // rather than using a global overflow list chained through 990 // the klass word of the object's pre-image. 991 if (UseCompressedOops && !ParGCUseLocalOverflow) { 992 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { 993 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); 994 } 995 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); 996 } 997 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); 998 } 999 } 1000 1001 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on 1002 // sparc/solaris for certain applications, but would gain from 1003 // further optimization and tuning efforts, and would almost 1004 // certainly gain from analysis of platform and environment. 1005 void Arguments::set_cms_and_parnew_gc_flags() { 1006 assert(!UseSerialGC && !UseParallelGC, "Error"); 1007 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1008 1009 // If we are using CMS, we prefer to UseParNewGC, 1010 // unless explicitly forbidden. 1011 if (FLAG_IS_DEFAULT(UseParNewGC)) { 1012 FLAG_SET_ERGO(bool, UseParNewGC, true); 1013 } 1014 1015 // Turn off AdaptiveSizePolicy by default for cms until it is 1016 // complete. 1017 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { 1018 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 1019 } 1020 1021 // In either case, adjust ParallelGCThreads and/or UseParNewGC 1022 // as needed. 1023 if (UseParNewGC) { 1024 set_parnew_gc_flags(); 1025 } 1026 1027 // Now make adjustments for CMS 1028 size_t young_gen_per_worker; 1029 intx new_ratio; 1030 size_t min_new_default; 1031 intx tenuring_default; 1032 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 1033 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { 1034 FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); 1035 } 1036 young_gen_per_worker = 4*M; 1037 new_ratio = (intx)15; 1038 min_new_default = 4*M; 1039 tenuring_default = (intx)0; 1040 } else { // new defaults: "new" as of 6.0 1041 young_gen_per_worker = CMSYoungGenPerWorker; 1042 new_ratio = (intx)7; 1043 min_new_default = 16*M; 1044 tenuring_default = (intx)4; 1045 } 1046 1047 // Preferred young gen size for "short" pauses 1048 const uintx parallel_gc_threads = 1049 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); 1050 const size_t preferred_max_new_size_unaligned = 1051 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); 1052 const size_t preferred_max_new_size = 1053 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1054 1055 // Unless explicitly requested otherwise, size young gen 1056 // for "short" pauses ~ 4M*ParallelGCThreads 1057 1058 // If either MaxNewSize or NewRatio is set on the command line, 1059 // assume the user is trying to set the size of the young gen. 1060 1061 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { 1062 1063 // Set MaxNewSize to our calculated preferred_max_new_size unless 1064 // NewSize was set on the command line and it is larger than 1065 // preferred_max_new_size. 1066 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1067 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1068 } else { 1069 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); 1070 } 1071 if(PrintGCDetails && Verbose) { 1072 // Too early to use gclog_or_tty 1073 tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1074 } 1075 1076 // Unless explicitly requested otherwise, prefer a large 1077 // Old to Young gen size so as to shift the collection load 1078 // to the old generation concurrent collector 1079 1080 // If this is only guarded by FLAG_IS_DEFAULT(NewRatio) 1081 // then NewSize and OldSize may be calculated. That would 1082 // generally lead to some differences with ParNewGC for which 1083 // there was no obvious reason. Also limit to the case where 1084 // MaxNewSize has not been set. 1085 1086 FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); 1087 1088 // Code along this path potentially sets NewSize and OldSize 1089 1090 // Calculate the desired minimum size of the young gen but if 1091 // NewSize has been set on the command line, use it here since 1092 // it should be the final value. 1093 size_t min_new; 1094 if (FLAG_IS_DEFAULT(NewSize)) { 1095 min_new = align_size_up(ScaleForWordSize(min_new_default), 1096 os::vm_page_size()); 1097 } else { 1098 min_new = NewSize; 1099 } 1100 size_t prev_initial_size = initial_heap_size(); 1101 if (prev_initial_size != 0 && prev_initial_size < min_new+OldSize) { 1102 set_initial_heap_size(min_new+OldSize); 1103 // Currently minimum size and the initial heap sizes are the same. 1104 set_min_heap_size(initial_heap_size()); 1105 if (PrintGCDetails && Verbose) { 1106 warning("Initial heap size increased to " SIZE_FORMAT " M from " 1107 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", 1108 initial_heap_size()/M, prev_initial_size/M); 1109 } 1110 } 1111 1112 // MaxHeapSize is aligned down in collectorPolicy 1113 size_t max_heap = 1114 align_size_down(MaxHeapSize, 1115 CardTableRS::ct_max_alignment_constraint()); 1116 1117 if(PrintGCDetails && Verbose) { 1118 // Too early to use gclog_or_tty 1119 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT 1120 " initial_heap_size: " SIZE_FORMAT 1121 " max_heap: " SIZE_FORMAT, 1122 min_heap_size(), initial_heap_size(), max_heap); 1123 } 1124 if (max_heap > min_new) { 1125 // Unless explicitly requested otherwise, make young gen 1126 // at least min_new, and at most preferred_max_new_size. 1127 if (FLAG_IS_DEFAULT(NewSize)) { 1128 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); 1129 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); 1130 if(PrintGCDetails && Verbose) { 1131 // Too early to use gclog_or_tty 1132 tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); 1133 } 1134 } 1135 // Unless explicitly requested otherwise, size old gen 1136 // so that it's at least 3X of NewSize to begin with; 1137 // later NewRatio will decide how it grows; see above. 1138 if (FLAG_IS_DEFAULT(OldSize)) { 1139 if (max_heap > NewSize) { 1140 FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); 1141 if(PrintGCDetails && Verbose) { 1142 // Too early to use gclog_or_tty 1143 tty->print_cr("Ergo set OldSize: " SIZE_FORMAT, OldSize); 1144 } 1145 } 1146 } 1147 } 1148 } 1149 // Unless explicitly requested otherwise, definitely 1150 // promote all objects surviving "tenuring_default" scavenges. 1151 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1152 FLAG_IS_DEFAULT(SurvivorRatio)) { 1153 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); 1154 } 1155 // If we decided above (or user explicitly requested) 1156 // `promote all' (via MaxTenuringThreshold := 0), 1157 // prefer minuscule survivor spaces so as not to waste 1158 // space for (non-existent) survivors 1159 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1160 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); 1161 } 1162 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, 1163 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. 1164 // This is done in order to make ParNew+CMS configuration to work 1165 // with YoungPLABSize and OldPLABSize options. 1166 // See CR 6362902. 1167 if (!FLAG_IS_DEFAULT(OldPLABSize)) { 1168 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1169 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim 1170 // is. In this situtation let CMSParPromoteBlocksToClaim follow 1171 // the value (either from the command line or ergonomics) of 1172 // OldPLABSize. Following OldPLABSize is an ergonomics decision. 1173 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); 1174 } 1175 else { 1176 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. 1177 // CMSParPromoteBlocksToClaim is a collector-specific flag, so 1178 // we'll let it to take precedence. 1179 jio_fprintf(defaultStream::error_stream(), 1180 "Both OldPLABSize and CMSParPromoteBlocksToClaim" 1181 " options are specified for the CMS collector." 1182 " CMSParPromoteBlocksToClaim will take precedence.\n"); 1183 } 1184 } 1185 } 1186 1187 inline uintx max_heap_for_compressed_oops() { 1188 LP64_ONLY(return oopDesc::OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); 1189 NOT_LP64(return DefaultMaxRAM); 1190 } 1191 1192 bool Arguments::should_auto_select_low_pause_collector() { 1193 if (UseAutoGCSelectPolicy && 1194 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1195 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1196 if (PrintGCDetails) { 1197 // Cannot use gclog_or_tty yet. 1198 tty->print_cr("Automatic selection of the low pause collector" 1199 " based on pause goal of %d (ms)", MaxGCPauseMillis); 1200 } 1201 return true; 1202 } 1203 return false; 1204 } 1205 1206 void Arguments::set_ergonomics_flags() { 1207 // Parallel GC is not compatible with sharing. If one specifies 1208 // that they want sharing explicitly, do not set ergonmics flags. 1209 if (DumpSharedSpaces || ForceSharedSpaces) { 1210 return; 1211 } 1212 1213 if (os::is_server_class_machine() && !force_client_mode ) { 1214 // If no other collector is requested explicitly, 1215 // let the VM select the collector based on 1216 // machine class and automatic selection policy. 1217 if (!UseSerialGC && 1218 !UseConcMarkSweepGC && 1219 !UseG1GC && 1220 !UseParNewGC && 1221 !DumpSharedSpaces && 1222 FLAG_IS_DEFAULT(UseParallelGC)) { 1223 if (should_auto_select_low_pause_collector()) { 1224 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1225 } else { 1226 FLAG_SET_ERGO(bool, UseParallelGC, true); 1227 } 1228 no_shared_spaces(); 1229 } 1230 } 1231 1232 #ifndef ZERO 1233 #ifdef _LP64 1234 // Check that UseCompressedOops can be set with the max heap size allocated 1235 // by ergonomics. 1236 if (MaxHeapSize <= max_heap_for_compressed_oops()) { 1237 if (FLAG_IS_DEFAULT(UseCompressedOops) && !UseG1GC) { 1238 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1239 } 1240 #ifdef _WIN64 1241 if (UseLargePages && UseCompressedOops) { 1242 // Cannot allocate guard pages for implicit checks in indexed addressing 1243 // mode, when large pages are specified on windows. 1244 // This flag could be switched ON if narrow oop base address is set to 0, 1245 // see code in Universe::initialize_heap(). 1246 Universe::set_narrow_oop_use_implicit_null_checks(false); 1247 } 1248 #endif // _WIN64 1249 } else { 1250 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1251 warning("Max heap size too large for Compressed Oops"); 1252 FLAG_SET_DEFAULT(UseCompressedOops, false); 1253 } 1254 } 1255 // Also checks that certain machines are slower with compressed oops 1256 // in vm_version initialization code. 1257 #endif // _LP64 1258 #endif // !ZERO 1259 } 1260 1261 void Arguments::set_parallel_gc_flags() { 1262 assert(UseParallelGC || UseParallelOldGC, "Error"); 1263 // If parallel old was requested, automatically enable parallel scavenge. 1264 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { 1265 FLAG_SET_DEFAULT(UseParallelGC, true); 1266 } 1267 1268 // If no heap maximum was requested explicitly, use some reasonable fraction 1269 // of the physical memory, up to a maximum of 1GB. 1270 if (UseParallelGC) { 1271 FLAG_SET_ERGO(uintx, ParallelGCThreads, 1272 Abstract_VM_Version::parallel_worker_threads()); 1273 1274 // PS is a server collector, setup the heap sizes accordingly. 1275 set_server_heap_size(); 1276 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1277 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1278 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1279 // See CR 6362902 for details. 1280 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1281 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1282 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1283 } 1284 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1285 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1286 } 1287 } 1288 1289 if (UseParallelOldGC) { 1290 // Par compact uses lower default values since they are treated as 1291 // minimums. These are different defaults because of the different 1292 // interpretation and are not ergonomically set. 1293 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1294 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1295 } 1296 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { 1297 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); 1298 } 1299 } 1300 } 1301 } 1302 1303 void Arguments::set_g1_gc_flags() { 1304 assert(UseG1GC, "Error"); 1305 // G1 is a server collector, setup the heap sizes accordingly. 1306 set_server_heap_size(); 1307 #ifdef COMPILER1 1308 FastTLABRefill = false; 1309 #endif 1310 FLAG_SET_DEFAULT(ParallelGCThreads, 1311 Abstract_VM_Version::parallel_worker_threads()); 1312 if (ParallelGCThreads == 0) { 1313 FLAG_SET_DEFAULT(ParallelGCThreads, 1314 Abstract_VM_Version::parallel_worker_threads()); 1315 } 1316 no_shared_spaces(); 1317 1318 // Set the maximum pause time goal to be a reasonable default. 1319 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) { 1320 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200); 1321 } 1322 } 1323 1324 void Arguments::set_server_heap_size() { 1325 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1326 const uint64_t reasonable_fraction = 1327 os::physical_memory() / DefaultMaxRAMFraction; 1328 const uint64_t maximum_size = (uint64_t) 1329 (FLAG_IS_DEFAULT(DefaultMaxRAM) && UseCompressedOops ? 1330 MIN2(max_heap_for_compressed_oops(), DefaultMaxRAM) : 1331 DefaultMaxRAM); 1332 size_t reasonable_max = 1333 (size_t) os::allocatable_physical_memory(reasonable_fraction); 1334 if (reasonable_max > maximum_size) { 1335 reasonable_max = maximum_size; 1336 } 1337 if (PrintGCDetails && Verbose) { 1338 // Cannot use gclog_or_tty yet. 1339 tty->print_cr(" Max heap size for server class platform " 1340 SIZE_FORMAT, reasonable_max); 1341 } 1342 // If the initial_heap_size has not been set with -Xms, 1343 // then set it as fraction of size of physical memory 1344 // respecting the maximum and minimum sizes of the heap. 1345 if (initial_heap_size() == 0) { 1346 const uint64_t reasonable_initial_fraction = 1347 os::physical_memory() / DefaultInitialRAMFraction; 1348 const size_t reasonable_initial = 1349 (size_t) os::allocatable_physical_memory(reasonable_initial_fraction); 1350 const size_t minimum_size = NewSize + OldSize; 1351 set_initial_heap_size(MAX2(MIN2(reasonable_initial, reasonable_max), 1352 minimum_size)); 1353 // Currently the minimum size and the initial heap sizes are the same. 1354 set_min_heap_size(initial_heap_size()); 1355 if (PrintGCDetails && Verbose) { 1356 // Cannot use gclog_or_tty yet. 1357 tty->print_cr(" Initial heap size for server class platform " 1358 SIZE_FORMAT, initial_heap_size()); 1359 } 1360 } else { 1361 // A minimum size was specified on the command line. Be sure 1362 // that the maximum size is consistent. 1363 if (initial_heap_size() > reasonable_max) { 1364 reasonable_max = initial_heap_size(); 1365 } 1366 } 1367 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx) reasonable_max); 1368 } 1369 } 1370 1371 // This must be called after ergonomics because we want bytecode rewriting 1372 // if the server compiler is used, or if UseSharedSpaces is disabled. 1373 void Arguments::set_bytecode_flags() { 1374 // Better not attempt to store into a read-only space. 1375 if (UseSharedSpaces) { 1376 FLAG_SET_DEFAULT(RewriteBytecodes, false); 1377 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1378 } 1379 1380 if (!RewriteBytecodes) { 1381 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1382 } 1383 } 1384 1385 // Aggressive optimization flags -XX:+AggressiveOpts 1386 void Arguments::set_aggressive_opts_flags() { 1387 #ifdef COMPILER2 1388 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1389 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1390 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1391 } 1392 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1393 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1394 } 1395 1396 // Feed the cache size setting into the JDK 1397 char buffer[1024]; 1398 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 1399 add_property(buffer); 1400 } 1401 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1402 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1403 } 1404 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 1405 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 1406 } 1407 #endif 1408 1409 if (AggressiveOpts) { 1410 // Sample flag setting code 1411 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1412 // FLAG_SET_DEFAULT(EliminateZeroing, true); 1413 // } 1414 } 1415 } 1416 1417 //=========================================================================================================== 1418 // Parsing of java.compiler property 1419 1420 void Arguments::process_java_compiler_argument(char* arg) { 1421 // For backwards compatibility, Djava.compiler=NONE or "" 1422 // causes us to switch to -Xint mode UNLESS -Xdebug 1423 // is also specified. 1424 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1425 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1426 } 1427 } 1428 1429 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 1430 _sun_java_launcher = strdup(launcher); 1431 } 1432 1433 bool Arguments::created_by_java_launcher() { 1434 assert(_sun_java_launcher != NULL, "property must have value"); 1435 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 1436 } 1437 1438 //=========================================================================================================== 1439 // Parsing of main arguments 1440 1441 bool Arguments::verify_percentage(uintx value, const char* name) { 1442 if (value <= 100) { 1443 return true; 1444 } 1445 jio_fprintf(defaultStream::error_stream(), 1446 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 1447 name, value); 1448 return false; 1449 } 1450 1451 static void set_serial_gc_flags() { 1452 FLAG_SET_DEFAULT(UseSerialGC, true); 1453 FLAG_SET_DEFAULT(UseParNewGC, false); 1454 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); 1455 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption 1456 FLAG_SET_DEFAULT(UseParallelGC, false); 1457 FLAG_SET_DEFAULT(UseParallelOldGC, false); 1458 FLAG_SET_DEFAULT(UseG1GC, false); 1459 } 1460 1461 static bool verify_serial_gc_flags() { 1462 return (UseSerialGC && 1463 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || 1464 UseParallelGC || UseParallelOldGC)); 1465 } 1466 1467 // Check consistency of GC selection 1468 bool Arguments::check_gc_consistency() { 1469 bool status = true; 1470 // Ensure that the user has not selected conflicting sets 1471 // of collectors. [Note: this check is merely a user convenience; 1472 // collectors over-ride each other so that only a non-conflicting 1473 // set is selected; however what the user gets is not what they 1474 // may have expected from the combination they asked for. It's 1475 // better to reduce user confusion by not allowing them to 1476 // select conflicting combinations. 1477 uint i = 0; 1478 if (UseSerialGC) i++; 1479 if (UseConcMarkSweepGC || UseParNewGC) i++; 1480 if (UseParallelGC || UseParallelOldGC) i++; 1481 if (UseG1GC) i++; 1482 if (i > 1) { 1483 jio_fprintf(defaultStream::error_stream(), 1484 "Conflicting collector combinations in option list; " 1485 "please refer to the release notes for the combinations " 1486 "allowed\n"); 1487 status = false; 1488 } 1489 1490 return status; 1491 } 1492 1493 // Check the consistency of vm_init_args 1494 bool Arguments::check_vm_args_consistency() { 1495 // Method for adding checks for flag consistency. 1496 // The intent is to warn the user of all possible conflicts, 1497 // before returning an error. 1498 // Note: Needs platform-dependent factoring. 1499 bool status = true; 1500 1501 #if ( (defined(COMPILER2) && defined(SPARC))) 1502 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init 1503 // on sparc doesn't require generation of a stub as is the case on, e.g., 1504 // x86. Normally, VM_Version_init must be called from init_globals in 1505 // init.cpp, which is called by the initial java thread *after* arguments 1506 // have been parsed. VM_Version_init gets called twice on sparc. 1507 extern void VM_Version_init(); 1508 VM_Version_init(); 1509 if (!VM_Version::has_v9()) { 1510 jio_fprintf(defaultStream::error_stream(), 1511 "V8 Machine detected, Server requires V9\n"); 1512 status = false; 1513 } 1514 #endif /* COMPILER2 && SPARC */ 1515 1516 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product 1517 // builds so the cost of stack banging can be measured. 1518 #if (defined(PRODUCT) && defined(SOLARIS)) 1519 if (!UseBoundThreads && !UseStackBanging) { 1520 jio_fprintf(defaultStream::error_stream(), 1521 "-UseStackBanging conflicts with -UseBoundThreads\n"); 1522 1523 status = false; 1524 } 1525 #endif 1526 1527 if (TLABRefillWasteFraction == 0) { 1528 jio_fprintf(defaultStream::error_stream(), 1529 "TLABRefillWasteFraction should be a denominator, " 1530 "not " SIZE_FORMAT "\n", 1531 TLABRefillWasteFraction); 1532 status = false; 1533 } 1534 1535 status = status && verify_percentage(MaxLiveObjectEvacuationRatio, 1536 "MaxLiveObjectEvacuationRatio"); 1537 status = status && verify_percentage(AdaptiveSizePolicyWeight, 1538 "AdaptiveSizePolicyWeight"); 1539 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); 1540 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 1541 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); 1542 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); 1543 1544 if (MinHeapFreeRatio > MaxHeapFreeRatio) { 1545 jio_fprintf(defaultStream::error_stream(), 1546 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 1547 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", 1548 MinHeapFreeRatio, MaxHeapFreeRatio); 1549 status = false; 1550 } 1551 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1552 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); 1553 1554 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 1555 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 1556 } 1557 1558 if (UseParallelOldGC && ParallelOldGCSplitALot) { 1559 // Settings to encourage splitting. 1560 if (!FLAG_IS_CMDLINE(NewRatio)) { 1561 FLAG_SET_CMDLINE(intx, NewRatio, 2); 1562 } 1563 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { 1564 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 1565 } 1566 } 1567 1568 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1569 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); 1570 if (GCTimeLimit == 100) { 1571 // Turn off gc-overhead-limit-exceeded checks 1572 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 1573 } 1574 1575 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1576 1577 // Check user specified sharing option conflict with Parallel GC 1578 bool cannot_share = ((UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || UseParNewGC || 1579 UseParallelGC || UseParallelOldGC || 1580 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); 1581 1582 if (cannot_share) { 1583 // Either force sharing on by forcing the other options off, or 1584 // force sharing off. 1585 if (DumpSharedSpaces || ForceSharedSpaces) { 1586 jio_fprintf(defaultStream::error_stream(), 1587 "Reverting to Serial GC because of %s \n", 1588 ForceSharedSpaces ? " -Xshare:on" : "-Xshare:dump"); 1589 set_serial_gc_flags(); 1590 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); 1591 } else { 1592 if (UseSharedSpaces) { 1593 jio_fprintf(defaultStream::error_stream(), 1594 "Turning off use of shared archive because of " 1595 "choice of garbage collector or large pages \n"); 1596 } 1597 no_shared_spaces(); 1598 } 1599 } 1600 1601 status = status && check_gc_consistency(); 1602 1603 if (_has_alloc_profile) { 1604 if (UseParallelGC || UseParallelOldGC) { 1605 jio_fprintf(defaultStream::error_stream(), 1606 "error: invalid argument combination.\n" 1607 "Allocation profiling (-Xaprof) cannot be used together with " 1608 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); 1609 status = false; 1610 } 1611 if (UseConcMarkSweepGC) { 1612 jio_fprintf(defaultStream::error_stream(), 1613 "error: invalid argument combination.\n" 1614 "Allocation profiling (-Xaprof) cannot be used together with " 1615 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); 1616 status = false; 1617 } 1618 } 1619 1620 if (CMSIncrementalMode) { 1621 if (!UseConcMarkSweepGC) { 1622 jio_fprintf(defaultStream::error_stream(), 1623 "error: invalid argument combination.\n" 1624 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 1625 "selected in order\nto use CMSIncrementalMode.\n"); 1626 status = false; 1627 } else { 1628 status = status && verify_percentage(CMSIncrementalDutyCycle, 1629 "CMSIncrementalDutyCycle"); 1630 status = status && verify_percentage(CMSIncrementalDutyCycleMin, 1631 "CMSIncrementalDutyCycleMin"); 1632 status = status && verify_percentage(CMSIncrementalSafetyFactor, 1633 "CMSIncrementalSafetyFactor"); 1634 status = status && verify_percentage(CMSIncrementalOffset, 1635 "CMSIncrementalOffset"); 1636 status = status && verify_percentage(CMSExpAvgFactor, 1637 "CMSExpAvgFactor"); 1638 // If it was not set on the command line, set 1639 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 1640 if (CMSInitiatingOccupancyFraction < 0) { 1641 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 1642 } 1643 } 1644 } 1645 1646 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 1647 // insists that we hold the requisite locks so that the iteration is 1648 // MT-safe. For the verification at start-up and shut-down, we don't 1649 // yet have a good way of acquiring and releasing these locks, 1650 // which are not visible at the CollectedHeap level. We want to 1651 // be able to acquire these locks and then do the iteration rather 1652 // than just disable the lock verification. This will be fixed under 1653 // bug 4788986. 1654 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 1655 if (VerifyGCStartAt == 0) { 1656 warning("Heap verification at start-up disabled " 1657 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1658 VerifyGCStartAt = 1; // Disable verification at start-up 1659 } 1660 if (VerifyBeforeExit) { 1661 warning("Heap verification at shutdown disabled " 1662 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1663 VerifyBeforeExit = false; // Disable verification at shutdown 1664 } 1665 } 1666 1667 // Note: only executed in non-PRODUCT mode 1668 if (!UseAsyncConcMarkSweepGC && 1669 (ExplicitGCInvokesConcurrent || 1670 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 1671 jio_fprintf(defaultStream::error_stream(), 1672 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" 1673 " with -UseAsyncConcMarkSweepGC"); 1674 status = false; 1675 } 1676 1677 return status; 1678 } 1679 1680 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 1681 const char* option_type) { 1682 if (ignore) return false; 1683 1684 const char* spacer = " "; 1685 if (option_type == NULL) { 1686 option_type = ++spacer; // Set both to the empty string. 1687 } 1688 1689 if (os::obsolete_option(option)) { 1690 jio_fprintf(defaultStream::error_stream(), 1691 "Obsolete %s%soption: %s\n", option_type, spacer, 1692 option->optionString); 1693 return false; 1694 } else { 1695 jio_fprintf(defaultStream::error_stream(), 1696 "Unrecognized %s%soption: %s\n", option_type, spacer, 1697 option->optionString); 1698 return true; 1699 } 1700 } 1701 1702 static const char* user_assertion_options[] = { 1703 "-da", "-ea", "-disableassertions", "-enableassertions", 0 1704 }; 1705 1706 static const char* system_assertion_options[] = { 1707 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 1708 }; 1709 1710 // Return true if any of the strings in null-terminated array 'names' matches. 1711 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 1712 // the option must match exactly. 1713 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 1714 bool tail_allowed) { 1715 for (/* empty */; *names != NULL; ++names) { 1716 if (match_option(option, *names, tail)) { 1717 if (**tail == '\0' || tail_allowed && **tail == ':') { 1718 return true; 1719 } 1720 } 1721 } 1722 return false; 1723 } 1724 1725 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 1726 julong* long_arg, 1727 julong min_size) { 1728 if (!atomull(s, long_arg)) return arg_unreadable; 1729 return check_memory_size(*long_arg, min_size); 1730 } 1731 1732 // Parse JavaVMInitArgs structure 1733 1734 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 1735 // For components of the system classpath. 1736 SysClassPath scp(Arguments::get_sysclasspath()); 1737 bool scp_assembly_required = false; 1738 1739 // Save default settings for some mode flags 1740 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 1741 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 1742 Arguments::_ClipInlining = ClipInlining; 1743 Arguments::_BackgroundCompilation = BackgroundCompilation; 1744 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 1745 1746 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 1747 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 1748 if (result != JNI_OK) { 1749 return result; 1750 } 1751 1752 // Parse JavaVMInitArgs structure passed in 1753 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); 1754 if (result != JNI_OK) { 1755 return result; 1756 } 1757 1758 if (AggressiveOpts) { 1759 // Insert alt-rt.jar between user-specified bootclasspath 1760 // prefix and the default bootclasspath. os::set_boot_path() 1761 // uses meta_index_dir as the default bootclasspath directory. 1762 const char* altclasses_jar = "alt-rt.jar"; 1763 size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 + 1764 strlen(altclasses_jar); 1765 char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len); 1766 strcpy(altclasses_path, get_meta_index_dir()); 1767 strcat(altclasses_path, altclasses_jar); 1768 scp.add_suffix_to_prefix(altclasses_path); 1769 scp_assembly_required = true; 1770 FREE_C_HEAP_ARRAY(char, altclasses_path); 1771 } 1772 1773 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 1774 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 1775 if (result != JNI_OK) { 1776 return result; 1777 } 1778 1779 // Do final processing now that all arguments have been parsed 1780 result = finalize_vm_init_args(&scp, scp_assembly_required); 1781 if (result != JNI_OK) { 1782 return result; 1783 } 1784 1785 return JNI_OK; 1786 } 1787 1788 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 1789 SysClassPath* scp_p, 1790 bool* scp_assembly_required_p, 1791 FlagValueOrigin origin) { 1792 // Remaining part of option string 1793 const char* tail; 1794 1795 // iterate over arguments 1796 for (int index = 0; index < args->nOptions; index++) { 1797 bool is_absolute_path = false; // for -agentpath vs -agentlib 1798 1799 const JavaVMOption* option = args->options + index; 1800 1801 if (!match_option(option, "-Djava.class.path", &tail) && 1802 !match_option(option, "-Dsun.java.command", &tail) && 1803 !match_option(option, "-Dsun.java.launcher", &tail)) { 1804 1805 // add all jvm options to the jvm_args string. This string 1806 // is used later to set the java.vm.args PerfData string constant. 1807 // the -Djava.class.path and the -Dsun.java.command options are 1808 // omitted from jvm_args string as each have their own PerfData 1809 // string constant object. 1810 build_jvm_args(option->optionString); 1811 } 1812 1813 // -verbose:[class/gc/jni] 1814 if (match_option(option, "-verbose", &tail)) { 1815 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 1816 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 1817 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1818 } else if (!strcmp(tail, ":gc")) { 1819 FLAG_SET_CMDLINE(bool, PrintGC, true); 1820 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1821 } else if (!strcmp(tail, ":jni")) { 1822 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 1823 } 1824 // -da / -ea / -disableassertions / -enableassertions 1825 // These accept an optional class/package name separated by a colon, e.g., 1826 // -da:java.lang.Thread. 1827 } else if (match_option(option, user_assertion_options, &tail, true)) { 1828 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1829 if (*tail == '\0') { 1830 JavaAssertions::setUserClassDefault(enable); 1831 } else { 1832 assert(*tail == ':', "bogus match by match_option()"); 1833 JavaAssertions::addOption(tail + 1, enable); 1834 } 1835 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 1836 } else if (match_option(option, system_assertion_options, &tail, false)) { 1837 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1838 JavaAssertions::setSystemClassDefault(enable); 1839 // -bootclasspath: 1840 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 1841 scp_p->reset_path(tail); 1842 *scp_assembly_required_p = true; 1843 // -bootclasspath/a: 1844 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 1845 scp_p->add_suffix(tail); 1846 *scp_assembly_required_p = true; 1847 // -bootclasspath/p: 1848 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 1849 scp_p->add_prefix(tail); 1850 *scp_assembly_required_p = true; 1851 // -Xrun 1852 } else if (match_option(option, "-Xrun", &tail)) { 1853 if (tail != NULL) { 1854 const char* pos = strchr(tail, ':'); 1855 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1856 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1857 name[len] = '\0'; 1858 1859 char *options = NULL; 1860 if(pos != NULL) { 1861 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 1862 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); 1863 } 1864 #ifdef JVMTI_KERNEL 1865 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1866 warning("profiling and debugging agents are not supported with Kernel VM"); 1867 } else 1868 #endif // JVMTI_KERNEL 1869 add_init_library(name, options); 1870 } 1871 // -agentlib and -agentpath 1872 } else if (match_option(option, "-agentlib:", &tail) || 1873 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 1874 if(tail != NULL) { 1875 const char* pos = strchr(tail, '='); 1876 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1877 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1878 name[len] = '\0'; 1879 1880 char *options = NULL; 1881 if(pos != NULL) { 1882 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); 1883 } 1884 #ifdef JVMTI_KERNEL 1885 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1886 warning("profiling and debugging agents are not supported with Kernel VM"); 1887 } else 1888 #endif // JVMTI_KERNEL 1889 add_init_agent(name, options, is_absolute_path); 1890 1891 } 1892 // -javaagent 1893 } else if (match_option(option, "-javaagent:", &tail)) { 1894 if(tail != NULL) { 1895 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); 1896 add_init_agent("instrument", options, false); 1897 } 1898 // -Xnoclassgc 1899 } else if (match_option(option, "-Xnoclassgc", &tail)) { 1900 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 1901 // -Xincgc: i-CMS 1902 } else if (match_option(option, "-Xincgc", &tail)) { 1903 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1904 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 1905 // -Xnoincgc: no i-CMS 1906 } else if (match_option(option, "-Xnoincgc", &tail)) { 1907 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1908 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 1909 // -Xconcgc 1910 } else if (match_option(option, "-Xconcgc", &tail)) { 1911 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1912 // -Xnoconcgc 1913 } else if (match_option(option, "-Xnoconcgc", &tail)) { 1914 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1915 // -Xbatch 1916 } else if (match_option(option, "-Xbatch", &tail)) { 1917 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1918 // -Xmn for compatibility with other JVM vendors 1919 } else if (match_option(option, "-Xmn", &tail)) { 1920 julong long_initial_eden_size = 0; 1921 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); 1922 if (errcode != arg_in_range) { 1923 jio_fprintf(defaultStream::error_stream(), 1924 "Invalid initial eden size: %s\n", option->optionString); 1925 describe_range_error(errcode); 1926 return JNI_EINVAL; 1927 } 1928 FLAG_SET_CMDLINE(uintx, MaxNewSize, (size_t) long_initial_eden_size); 1929 FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size); 1930 // -Xms 1931 } else if (match_option(option, "-Xms", &tail)) { 1932 julong long_initial_heap_size = 0; 1933 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); 1934 if (errcode != arg_in_range) { 1935 jio_fprintf(defaultStream::error_stream(), 1936 "Invalid initial heap size: %s\n", option->optionString); 1937 describe_range_error(errcode); 1938 return JNI_EINVAL; 1939 } 1940 set_initial_heap_size((size_t) long_initial_heap_size); 1941 // Currently the minimum size and the initial heap sizes are the same. 1942 set_min_heap_size(initial_heap_size()); 1943 // -Xmx 1944 } else if (match_option(option, "-Xmx", &tail)) { 1945 julong long_max_heap_size = 0; 1946 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 1947 if (errcode != arg_in_range) { 1948 jio_fprintf(defaultStream::error_stream(), 1949 "Invalid maximum heap size: %s\n", option->optionString); 1950 describe_range_error(errcode); 1951 return JNI_EINVAL; 1952 } 1953 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (size_t) long_max_heap_size); 1954 // Xmaxf 1955 } else if (match_option(option, "-Xmaxf", &tail)) { 1956 int maxf = (int)(atof(tail) * 100); 1957 if (maxf < 0 || maxf > 100) { 1958 jio_fprintf(defaultStream::error_stream(), 1959 "Bad max heap free percentage size: %s\n", 1960 option->optionString); 1961 return JNI_EINVAL; 1962 } else { 1963 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 1964 } 1965 // Xminf 1966 } else if (match_option(option, "-Xminf", &tail)) { 1967 int minf = (int)(atof(tail) * 100); 1968 if (minf < 0 || minf > 100) { 1969 jio_fprintf(defaultStream::error_stream(), 1970 "Bad min heap free percentage size: %s\n", 1971 option->optionString); 1972 return JNI_EINVAL; 1973 } else { 1974 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 1975 } 1976 // -Xss 1977 } else if (match_option(option, "-Xss", &tail)) { 1978 julong long_ThreadStackSize = 0; 1979 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 1980 if (errcode != arg_in_range) { 1981 jio_fprintf(defaultStream::error_stream(), 1982 "Invalid thread stack size: %s\n", option->optionString); 1983 describe_range_error(errcode); 1984 return JNI_EINVAL; 1985 } 1986 // Internally track ThreadStackSize in units of 1024 bytes. 1987 FLAG_SET_CMDLINE(intx, ThreadStackSize, 1988 round_to((int)long_ThreadStackSize, K) / K); 1989 // -Xoss 1990 } else if (match_option(option, "-Xoss", &tail)) { 1991 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 1992 // -Xmaxjitcodesize 1993 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { 1994 julong long_ReservedCodeCacheSize = 0; 1995 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1996 (size_t)InitialCodeCacheSize); 1997 if (errcode != arg_in_range) { 1998 jio_fprintf(defaultStream::error_stream(), 1999 "Invalid maximum code cache size: %s\n", 2000 option->optionString); 2001 describe_range_error(errcode); 2002 return JNI_EINVAL; 2003 } 2004 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 2005 // -green 2006 } else if (match_option(option, "-green", &tail)) { 2007 jio_fprintf(defaultStream::error_stream(), 2008 "Green threads support not available\n"); 2009 return JNI_EINVAL; 2010 // -native 2011 } else if (match_option(option, "-native", &tail)) { 2012 // HotSpot always uses native threads, ignore silently for compatibility 2013 // -Xsqnopause 2014 } else if (match_option(option, "-Xsqnopause", &tail)) { 2015 // EVM option, ignore silently for compatibility 2016 // -Xrs 2017 } else if (match_option(option, "-Xrs", &tail)) { 2018 // Classic/EVM option, new functionality 2019 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 2020 } else if (match_option(option, "-Xusealtsigs", &tail)) { 2021 // change default internal VM signals used - lower case for back compat 2022 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 2023 // -Xoptimize 2024 } else if (match_option(option, "-Xoptimize", &tail)) { 2025 // EVM option, ignore silently for compatibility 2026 // -Xprof 2027 } else if (match_option(option, "-Xprof", &tail)) { 2028 #ifndef FPROF_KERNEL 2029 _has_profile = true; 2030 #else // FPROF_KERNEL 2031 // do we have to exit? 2032 warning("Kernel VM does not support flat profiling."); 2033 #endif // FPROF_KERNEL 2034 // -Xaprof 2035 } else if (match_option(option, "-Xaprof", &tail)) { 2036 _has_alloc_profile = true; 2037 // -Xconcurrentio 2038 } else if (match_option(option, "-Xconcurrentio", &tail)) { 2039 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 2040 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 2041 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 2042 FLAG_SET_CMDLINE(bool, UseTLAB, false); 2043 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 2044 2045 // -Xinternalversion 2046 } else if (match_option(option, "-Xinternalversion", &tail)) { 2047 jio_fprintf(defaultStream::output_stream(), "%s\n", 2048 VM_Version::internal_vm_info_string()); 2049 vm_exit(0); 2050 #ifndef PRODUCT 2051 // -Xprintflags 2052 } else if (match_option(option, "-Xprintflags", &tail)) { 2053 CommandLineFlags::printFlags(); 2054 vm_exit(0); 2055 #endif 2056 // -D 2057 } else if (match_option(option, "-D", &tail)) { 2058 if (!add_property(tail)) { 2059 return JNI_ENOMEM; 2060 } 2061 // Out of the box management support 2062 if (match_option(option, "-Dcom.sun.management", &tail)) { 2063 FLAG_SET_CMDLINE(bool, ManagementServer, true); 2064 } 2065 // -Xint 2066 } else if (match_option(option, "-Xint", &tail)) { 2067 set_mode_flags(_int); 2068 // -Xmixed 2069 } else if (match_option(option, "-Xmixed", &tail)) { 2070 set_mode_flags(_mixed); 2071 // -Xcomp 2072 } else if (match_option(option, "-Xcomp", &tail)) { 2073 // for testing the compiler; turn off all flags that inhibit compilation 2074 set_mode_flags(_comp); 2075 2076 // -Xshare:dump 2077 } else if (match_option(option, "-Xshare:dump", &tail)) { 2078 #ifdef TIERED 2079 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 2080 set_mode_flags(_int); // Prevent compilation, which creates objects 2081 #elif defined(COMPILER2) 2082 vm_exit_during_initialization( 2083 "Dumping a shared archive is not supported on the Server JVM.", NULL); 2084 #elif defined(KERNEL) 2085 vm_exit_during_initialization( 2086 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); 2087 #else 2088 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 2089 set_mode_flags(_int); // Prevent compilation, which creates objects 2090 #endif 2091 // -Xshare:on 2092 } else if (match_option(option, "-Xshare:on", &tail)) { 2093 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 2094 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 2095 #ifdef TIERED 2096 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); 2097 #endif // TIERED 2098 // -Xshare:auto 2099 } else if (match_option(option, "-Xshare:auto", &tail)) { 2100 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 2101 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 2102 // -Xshare:off 2103 } else if (match_option(option, "-Xshare:off", &tail)) { 2104 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 2105 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 2106 2107 // -Xverify 2108 } else if (match_option(option, "-Xverify", &tail)) { 2109 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 2110 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 2111 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 2112 } else if (strcmp(tail, ":remote") == 0) { 2113 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 2114 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 2115 } else if (strcmp(tail, ":none") == 0) { 2116 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 2117 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 2118 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 2119 return JNI_EINVAL; 2120 } 2121 // -Xdebug 2122 } else if (match_option(option, "-Xdebug", &tail)) { 2123 // note this flag has been used, then ignore 2124 set_xdebug_mode(true); 2125 // -Xnoagent 2126 } else if (match_option(option, "-Xnoagent", &tail)) { 2127 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 2128 } else if (match_option(option, "-Xboundthreads", &tail)) { 2129 // Bind user level threads to kernel threads (Solaris only) 2130 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 2131 } else if (match_option(option, "-Xloggc:", &tail)) { 2132 // Redirect GC output to the file. -Xloggc:<filename> 2133 // ostream_init_log(), when called will use this filename 2134 // to initialize a fileStream. 2135 _gc_log_filename = strdup(tail); 2136 FLAG_SET_CMDLINE(bool, PrintGC, true); 2137 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 2138 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 2139 2140 // JNI hooks 2141 } else if (match_option(option, "-Xcheck", &tail)) { 2142 if (!strcmp(tail, ":jni")) { 2143 CheckJNICalls = true; 2144 } else if (is_bad_option(option, args->ignoreUnrecognized, 2145 "check")) { 2146 return JNI_EINVAL; 2147 } 2148 } else if (match_option(option, "vfprintf", &tail)) { 2149 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 2150 } else if (match_option(option, "exit", &tail)) { 2151 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 2152 } else if (match_option(option, "abort", &tail)) { 2153 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 2154 // -XX:+AggressiveHeap 2155 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 2156 2157 // This option inspects the machine and attempts to set various 2158 // parameters to be optimal for long-running, memory allocation 2159 // intensive jobs. It is intended for machines with large 2160 // amounts of cpu and memory. 2161 2162 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 2163 // VM, but we may not be able to represent the total physical memory 2164 // available (like having 8gb of memory on a box but using a 32bit VM). 2165 // Thus, we need to make sure we're using a julong for intermediate 2166 // calculations. 2167 julong initHeapSize; 2168 julong total_memory = os::physical_memory(); 2169 2170 if (total_memory < (julong)256*M) { 2171 jio_fprintf(defaultStream::error_stream(), 2172 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 2173 vm_exit(1); 2174 } 2175 2176 // The heap size is half of available memory, or (at most) 2177 // all of possible memory less 160mb (leaving room for the OS 2178 // when using ISM). This is the maximum; because adaptive sizing 2179 // is turned on below, the actual space used may be smaller. 2180 2181 initHeapSize = MIN2(total_memory / (julong)2, 2182 total_memory - (julong)160*M); 2183 2184 // Make sure that if we have a lot of memory we cap the 32 bit 2185 // process space. The 64bit VM version of this function is a nop. 2186 initHeapSize = os::allocatable_physical_memory(initHeapSize); 2187 2188 // The perm gen is separate but contiguous with the 2189 // object heap (and is reserved with it) so subtract it 2190 // from the heap size. 2191 if (initHeapSize > MaxPermSize) { 2192 initHeapSize = initHeapSize - MaxPermSize; 2193 } else { 2194 warning("AggressiveHeap and MaxPermSize values may conflict"); 2195 } 2196 2197 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2198 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 2199 set_initial_heap_size(MaxHeapSize); 2200 // Currently the minimum size and the initial heap sizes are the same. 2201 set_min_heap_size(initial_heap_size()); 2202 } 2203 if (FLAG_IS_DEFAULT(NewSize)) { 2204 // Make the young generation 3/8ths of the total heap. 2205 FLAG_SET_CMDLINE(uintx, NewSize, 2206 ((julong)MaxHeapSize / (julong)8) * (julong)3); 2207 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 2208 } 2209 2210 FLAG_SET_DEFAULT(UseLargePages, true); 2211 2212 // Increase some data structure sizes for efficiency 2213 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 2214 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2215 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 2216 2217 // See the OldPLABSize comment below, but replace 'after promotion' 2218 // with 'after copying'. YoungPLABSize is the size of the survivor 2219 // space per-gc-thread buffers. The default is 4kw. 2220 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 2221 2222 // OldPLABSize is the size of the buffers in the old gen that 2223 // UseParallelGC uses to promote live data that doesn't fit in the 2224 // survivor spaces. At any given time, there's one for each gc thread. 2225 // The default size is 1kw. These buffers are rarely used, since the 2226 // survivor spaces are usually big enough. For specjbb, however, there 2227 // are occasions when there's lots of live data in the young gen 2228 // and we end up promoting some of it. We don't have a definite 2229 // explanation for why bumping OldPLABSize helps, but the theory 2230 // is that a bigger PLAB results in retaining something like the 2231 // original allocation order after promotion, which improves mutator 2232 // locality. A minor effect may be that larger PLABs reduce the 2233 // number of PLAB allocation events during gc. The value of 8kw 2234 // was arrived at by experimenting with specjbb. 2235 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 2236 2237 // CompilationPolicyChoice=0 causes the server compiler to adopt 2238 // a more conservative which-method-do-I-compile policy when one 2239 // of the counters maintained by the interpreter trips. The 2240 // result is reduced startup time and improved specjbb and 2241 // alacrity performance. Zero is the default, but we set it 2242 // explicitly here in case the default changes. 2243 // See runtime/compilationPolicy.*. 2244 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); 2245 2246 // Enable parallel GC and adaptive generation sizing 2247 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 2248 FLAG_SET_DEFAULT(ParallelGCThreads, 2249 Abstract_VM_Version::parallel_worker_threads()); 2250 2251 // Encourage steady state memory management 2252 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 2253 2254 // This appears to improve mutator locality 2255 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2256 2257 // Get around early Solaris scheduling bug 2258 // (affinity vs other jobs on system) 2259 // but disallow DR and offlining (5008695). 2260 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 2261 2262 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 2263 // The last option must always win. 2264 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 2265 FLAG_SET_CMDLINE(bool, NeverTenure, true); 2266 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 2267 // The last option must always win. 2268 FLAG_SET_CMDLINE(bool, NeverTenure, false); 2269 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 2270 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 2271 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 2272 jio_fprintf(defaultStream::error_stream(), 2273 "Please use CMSClassUnloadingEnabled in place of " 2274 "CMSPermGenSweepingEnabled in the future\n"); 2275 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 2276 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 2277 jio_fprintf(defaultStream::error_stream(), 2278 "Please use -XX:+UseGCOverheadLimit in place of " 2279 "-XX:+UseGCTimeLimit in the future\n"); 2280 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 2281 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 2282 jio_fprintf(defaultStream::error_stream(), 2283 "Please use -XX:-UseGCOverheadLimit in place of " 2284 "-XX:-UseGCTimeLimit in the future\n"); 2285 // The TLE options are for compatibility with 1.3 and will be 2286 // removed without notice in a future release. These options 2287 // are not to be documented. 2288 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 2289 // No longer used. 2290 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 2291 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 2292 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 2293 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2294 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 2295 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 2296 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 2297 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 2298 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 2299 // No longer used. 2300 } else if (match_option(option, "-XX:TLESize=", &tail)) { 2301 julong long_tlab_size = 0; 2302 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 2303 if (errcode != arg_in_range) { 2304 jio_fprintf(defaultStream::error_stream(), 2305 "Invalid TLAB size: %s\n", option->optionString); 2306 describe_range_error(errcode); 2307 return JNI_EINVAL; 2308 } 2309 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 2310 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 2311 // No longer used. 2312 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 2313 FLAG_SET_CMDLINE(bool, UseTLAB, true); 2314 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 2315 FLAG_SET_CMDLINE(bool, UseTLAB, false); 2316 SOLARIS_ONLY( 2317 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { 2318 warning("-XX:+UsePermISM is obsolete."); 2319 FLAG_SET_CMDLINE(bool, UseISM, true); 2320 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { 2321 FLAG_SET_CMDLINE(bool, UseISM, false); 2322 ) 2323 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 2324 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 2325 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 2326 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 2327 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 2328 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 2329 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 2330 #ifdef SOLARIS 2331 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 2332 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 2333 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 2334 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 2335 #else // ndef SOLARIS 2336 jio_fprintf(defaultStream::error_stream(), 2337 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); 2338 return JNI_EINVAL; 2339 #endif // ndef SOLARIS 2340 } else 2341 #ifdef ASSERT 2342 if (match_option(option, "-XX:+FullGCALot", &tail)) { 2343 FLAG_SET_CMDLINE(bool, FullGCALot, true); 2344 // disable scavenge before parallel mark-compact 2345 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2346 } else 2347 #endif 2348 if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 2349 julong cms_blocks_to_claim = (julong)atol(tail); 2350 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 2351 jio_fprintf(defaultStream::error_stream(), 2352 "Please use -XX:CMSParPromoteBlocksToClaim in place of " 2353 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 2354 } else 2355 if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 2356 julong old_plab_size = 0; 2357 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 2358 if (errcode != arg_in_range) { 2359 jio_fprintf(defaultStream::error_stream(), 2360 "Invalid old PLAB size: %s\n", option->optionString); 2361 describe_range_error(errcode); 2362 return JNI_EINVAL; 2363 } 2364 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); 2365 jio_fprintf(defaultStream::error_stream(), 2366 "Please use -XX:OldPLABSize in place of " 2367 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 2368 } else 2369 if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 2370 julong young_plab_size = 0; 2371 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 2372 if (errcode != arg_in_range) { 2373 jio_fprintf(defaultStream::error_stream(), 2374 "Invalid young PLAB size: %s\n", option->optionString); 2375 describe_range_error(errcode); 2376 return JNI_EINVAL; 2377 } 2378 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); 2379 jio_fprintf(defaultStream::error_stream(), 2380 "Please use -XX:YoungPLABSize in place of " 2381 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 2382 } else 2383 if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 2384 // Skip -XX:Flags= since that case has already been handled 2385 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 2386 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 2387 return JNI_EINVAL; 2388 } 2389 } 2390 // Unknown option 2391 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 2392 return JNI_ERR; 2393 } 2394 } 2395 // Change the default value for flags which have different default values 2396 // when working with older JDKs. 2397 if (JDK_Version::current().compare_major(6) <= 0 && 2398 FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { 2399 FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); 2400 } 2401 return JNI_OK; 2402 } 2403 2404 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 2405 // This must be done after all -D arguments have been processed. 2406 scp_p->expand_endorsed(); 2407 2408 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { 2409 // Assemble the bootclasspath elements into the final path. 2410 Arguments::set_sysclasspath(scp_p->combined_path()); 2411 } 2412 2413 // This must be done after all arguments have been processed. 2414 // java_compiler() true means set to "NONE" or empty. 2415 if (java_compiler() && !xdebug_mode()) { 2416 // For backwards compatibility, we switch to interpreted mode if 2417 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 2418 // not specified. 2419 set_mode_flags(_int); 2420 } 2421 if (CompileThreshold == 0) { 2422 set_mode_flags(_int); 2423 } 2424 2425 #ifdef TIERED 2426 // If we are using tiered compilation in the tiered vm then c1 will 2427 // do the profiling and we don't want to waste that time in the 2428 // interpreter. 2429 if (TieredCompilation) { 2430 ProfileInterpreter = false; 2431 } else { 2432 // Since we are running vanilla server we must adjust the compile threshold 2433 // unless the user has already adjusted it because the default threshold assumes 2434 // we will run tiered. 2435 2436 if (FLAG_IS_DEFAULT(CompileThreshold)) { 2437 CompileThreshold = Tier2CompileThreshold; 2438 } 2439 } 2440 #endif // TIERED 2441 2442 #ifndef COMPILER2 2443 // Don't degrade server performance for footprint 2444 if (FLAG_IS_DEFAULT(UseLargePages) && 2445 MaxHeapSize < LargePageHeapSizeThreshold) { 2446 // No need for large granularity pages w/small heaps. 2447 // Note that large pages are enabled/disabled for both the 2448 // Java heap and the code cache. 2449 FLAG_SET_DEFAULT(UseLargePages, false); 2450 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); 2451 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); 2452 } 2453 2454 #else 2455 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 2456 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 2457 } 2458 // Temporary disable bulk zeroing reduction with G1. See CR 6627983. 2459 if (UseG1GC) { 2460 FLAG_SET_DEFAULT(ReduceBulkZeroing, false); 2461 } 2462 #endif 2463 2464 if (!check_vm_args_consistency()) { 2465 return JNI_ERR; 2466 } 2467 2468 return JNI_OK; 2469 } 2470 2471 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2472 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 2473 scp_assembly_required_p); 2474 } 2475 2476 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2477 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 2478 scp_assembly_required_p); 2479 } 2480 2481 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 2482 const int N_MAX_OPTIONS = 64; 2483 const int OPTION_BUFFER_SIZE = 1024; 2484 char buffer[OPTION_BUFFER_SIZE]; 2485 2486 // The variable will be ignored if it exceeds the length of the buffer. 2487 // Don't check this variable if user has special privileges 2488 // (e.g. unix su command). 2489 if (os::getenv(name, buffer, sizeof(buffer)) && 2490 !os::have_special_privileges()) { 2491 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 2492 jio_fprintf(defaultStream::error_stream(), 2493 "Picked up %s: %s\n", name, buffer); 2494 char* rd = buffer; // pointer to the input string (rd) 2495 int i; 2496 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 2497 while (isspace(*rd)) rd++; // skip whitespace 2498 if (*rd == 0) break; // we re done when the input string is read completely 2499 2500 // The output, option string, overwrites the input string. 2501 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 2502 // input string (rd). 2503 char* wrt = rd; 2504 2505 options[i++].optionString = wrt; // Fill in option 2506 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 2507 if (*rd == '\'' || *rd == '"') { // handle a quoted string 2508 int quote = *rd; // matching quote to look for 2509 rd++; // don't copy open quote 2510 while (*rd != quote) { // include everything (even spaces) up until quote 2511 if (*rd == 0) { // string termination means unmatched string 2512 jio_fprintf(defaultStream::error_stream(), 2513 "Unmatched quote in %s\n", name); 2514 return JNI_ERR; 2515 } 2516 *wrt++ = *rd++; // copy to option string 2517 } 2518 rd++; // don't copy close quote 2519 } else { 2520 *wrt++ = *rd++; // copy to option string 2521 } 2522 } 2523 // Need to check if we're done before writing a NULL, 2524 // because the write could be to the byte that rd is pointing to. 2525 if (*rd++ == 0) { 2526 *wrt = 0; 2527 break; 2528 } 2529 *wrt = 0; // Zero terminate option 2530 } 2531 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 2532 JavaVMInitArgs vm_args; 2533 vm_args.version = JNI_VERSION_1_2; 2534 vm_args.options = options; 2535 vm_args.nOptions = i; 2536 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 2537 2538 if (PrintVMOptions) { 2539 const char* tail; 2540 for (int i = 0; i < vm_args.nOptions; i++) { 2541 const JavaVMOption *option = vm_args.options + i; 2542 if (match_option(option, "-XX:", &tail)) { 2543 logOption(tail); 2544 } 2545 } 2546 } 2547 2548 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); 2549 } 2550 return JNI_OK; 2551 } 2552 2553 // Parse entry point called from JNI_CreateJavaVM 2554 2555 jint Arguments::parse(const JavaVMInitArgs* args) { 2556 2557 // Sharing support 2558 // Construct the path to the archive 2559 char jvm_path[JVM_MAXPATHLEN]; 2560 os::jvm_path(jvm_path, sizeof(jvm_path)); 2561 #ifdef TIERED 2562 if (strstr(jvm_path, "client") != NULL) { 2563 force_client_mode = true; 2564 } 2565 #endif // TIERED 2566 char *end = strrchr(jvm_path, *os::file_separator()); 2567 if (end != NULL) *end = '\0'; 2568 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + 2569 strlen(os::file_separator()) + 20); 2570 if (shared_archive_path == NULL) return JNI_ENOMEM; 2571 strcpy(shared_archive_path, jvm_path); 2572 strcat(shared_archive_path, os::file_separator()); 2573 strcat(shared_archive_path, "classes"); 2574 DEBUG_ONLY(strcat(shared_archive_path, "_g");) 2575 strcat(shared_archive_path, ".jsa"); 2576 SharedArchivePath = shared_archive_path; 2577 2578 // Remaining part of option string 2579 const char* tail; 2580 2581 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 2582 bool settings_file_specified = false; 2583 const char* flags_file; 2584 int index; 2585 for (index = 0; index < args->nOptions; index++) { 2586 const JavaVMOption *option = args->options + index; 2587 if (match_option(option, "-XX:Flags=", &tail)) { 2588 flags_file = tail; 2589 settings_file_specified = true; 2590 } 2591 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 2592 PrintVMOptions = true; 2593 } 2594 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { 2595 PrintVMOptions = false; 2596 } 2597 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { 2598 IgnoreUnrecognizedVMOptions = true; 2599 } 2600 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { 2601 IgnoreUnrecognizedVMOptions = false; 2602 } 2603 } 2604 2605 if (IgnoreUnrecognizedVMOptions) { 2606 // uncast const to modify the flag args->ignoreUnrecognized 2607 *(jboolean*)(&args->ignoreUnrecognized) = true; 2608 } 2609 2610 // Parse specified settings file 2611 if (settings_file_specified) { 2612 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { 2613 return JNI_EINVAL; 2614 } 2615 } 2616 2617 // Parse default .hotspotrc settings file 2618 if (!settings_file_specified) { 2619 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 2620 return JNI_EINVAL; 2621 } 2622 } 2623 2624 if (PrintVMOptions) { 2625 for (index = 0; index < args->nOptions; index++) { 2626 const JavaVMOption *option = args->options + index; 2627 if (match_option(option, "-XX:", &tail)) { 2628 logOption(tail); 2629 } 2630 } 2631 } 2632 2633 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 2634 jint result = parse_vm_init_args(args); 2635 if (result != JNI_OK) { 2636 return result; 2637 } 2638 2639 #ifndef PRODUCT 2640 if (TraceBytecodesAt != 0) { 2641 TraceBytecodes = true; 2642 } 2643 if (CountCompiledCalls) { 2644 if (UseCounterDecay) { 2645 warning("UseCounterDecay disabled because CountCalls is set"); 2646 UseCounterDecay = false; 2647 } 2648 } 2649 #endif // PRODUCT 2650 2651 if (EnableInvokeDynamic && !EnableMethodHandles) { 2652 if (!FLAG_IS_DEFAULT(EnableMethodHandles)) { 2653 warning("forcing EnableMethodHandles true because EnableInvokeDynamic is true"); 2654 } 2655 EnableMethodHandles = true; 2656 } 2657 if (EnableMethodHandles && !AnonymousClasses) { 2658 if (!FLAG_IS_DEFAULT(AnonymousClasses)) { 2659 warning("forcing AnonymousClasses true because EnableMethodHandles is true"); 2660 } 2661 AnonymousClasses = true; 2662 } 2663 if ((EnableMethodHandles || AnonymousClasses) && ScavengeRootsInCode == 0) { 2664 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 2665 warning("forcing ScavengeRootsInCode non-zero because EnableMethodHandles or AnonymousClasses is true"); 2666 } 2667 ScavengeRootsInCode = 1; 2668 } 2669 2670 if (PrintGCDetails) { 2671 // Turn on -verbose:gc options as well 2672 PrintGC = true; 2673 if (FLAG_IS_DEFAULT(TraceClassUnloading)) { 2674 TraceClassUnloading = true; 2675 } 2676 } 2677 2678 #ifdef SERIALGC 2679 set_serial_gc_flags(); 2680 #endif // SERIALGC 2681 #ifdef KERNEL 2682 no_shared_spaces(); 2683 #endif // KERNEL 2684 2685 // Set flags based on ergonomics. 2686 set_ergonomics_flags(); 2687 2688 // Check the GC selections again. 2689 if (!check_gc_consistency()) { 2690 return JNI_EINVAL; 2691 } 2692 2693 if (UseParallelGC || UseParallelOldGC) { 2694 // Set some flags for ParallelGC if needed. 2695 set_parallel_gc_flags(); 2696 } else if (UseConcMarkSweepGC) { 2697 // Set some flags for CMS 2698 set_cms_and_parnew_gc_flags(); 2699 } else if (UseParNewGC) { 2700 // Set some flags for ParNew 2701 set_parnew_gc_flags(); 2702 } else if (UseG1GC) { 2703 // Set some flags for garbage-first, if needed. 2704 set_g1_gc_flags(); 2705 } 2706 2707 #ifdef SERIALGC 2708 assert(verify_serial_gc_flags(), "SerialGC unset"); 2709 #endif // SERIALGC 2710 2711 // Set bytecode rewriting flags 2712 set_bytecode_flags(); 2713 2714 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. 2715 set_aggressive_opts_flags(); 2716 2717 #ifdef CC_INTERP 2718 // Biased locking is not implemented with c++ interpreter 2719 FLAG_SET_DEFAULT(UseBiasedLocking, false); 2720 #endif /* CC_INTERP */ 2721 2722 #ifdef COMPILER2 2723 if (!UseBiasedLocking || EmitSync != 0) { 2724 UseOptoBiasInlining = false; 2725 } 2726 #endif 2727 2728 if (PrintCommandLineFlags) { 2729 CommandLineFlags::printSetFlags(); 2730 } 2731 2732 #ifdef ASSERT 2733 if (PrintFlagsFinal) { 2734 CommandLineFlags::printFlags(); 2735 } 2736 #endif 2737 2738 return JNI_OK; 2739 } 2740 2741 int Arguments::PropertyList_count(SystemProperty* pl) { 2742 int count = 0; 2743 while(pl != NULL) { 2744 count++; 2745 pl = pl->next(); 2746 } 2747 return count; 2748 } 2749 2750 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 2751 assert(key != NULL, "just checking"); 2752 SystemProperty* prop; 2753 for (prop = pl; prop != NULL; prop = prop->next()) { 2754 if (strcmp(key, prop->key()) == 0) return prop->value(); 2755 } 2756 return NULL; 2757 } 2758 2759 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 2760 int count = 0; 2761 const char* ret_val = NULL; 2762 2763 while(pl != NULL) { 2764 if(count >= index) { 2765 ret_val = pl->key(); 2766 break; 2767 } 2768 count++; 2769 pl = pl->next(); 2770 } 2771 2772 return ret_val; 2773 } 2774 2775 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 2776 int count = 0; 2777 char* ret_val = NULL; 2778 2779 while(pl != NULL) { 2780 if(count >= index) { 2781 ret_val = pl->value(); 2782 break; 2783 } 2784 count++; 2785 pl = pl->next(); 2786 } 2787 2788 return ret_val; 2789 } 2790 2791 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 2792 SystemProperty* p = *plist; 2793 if (p == NULL) { 2794 *plist = new_p; 2795 } else { 2796 while (p->next() != NULL) { 2797 p = p->next(); 2798 } 2799 p->set_next(new_p); 2800 } 2801 } 2802 2803 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 2804 if (plist == NULL) 2805 return; 2806 2807 SystemProperty* new_p = new SystemProperty(k, v, true); 2808 PropertyList_add(plist, new_p); 2809 } 2810 2811 // This add maintains unique property key in the list. 2812 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { 2813 if (plist == NULL) 2814 return; 2815 2816 // If property key exist then update with new value. 2817 SystemProperty* prop; 2818 for (prop = *plist; prop != NULL; prop = prop->next()) { 2819 if (strcmp(k, prop->key()) == 0) { 2820 if (append) { 2821 prop->append_value(v); 2822 } else { 2823 prop->set_value(v); 2824 } 2825 return; 2826 } 2827 } 2828 2829 PropertyList_add(plist, k, v); 2830 } 2831 2832 #ifdef KERNEL 2833 char *Arguments::get_kernel_properties() { 2834 // Find properties starting with kernel and append them to string 2835 // We need to find out how long they are first because the URL's that they 2836 // might point to could get long. 2837 int length = 0; 2838 SystemProperty* prop; 2839 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2840 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2841 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" 2842 } 2843 } 2844 // Add one for null terminator. 2845 char *props = AllocateHeap(length + 1, "get_kernel_properties"); 2846 if (length != 0) { 2847 int pos = 0; 2848 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2849 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2850 jio_snprintf(&props[pos], length-pos, 2851 "-D%s=%s ", prop->key(), prop->value()); 2852 pos = strlen(props); 2853 } 2854 } 2855 } 2856 // null terminate props in case of null 2857 props[length] = '\0'; 2858 return props; 2859 } 2860 #endif // KERNEL 2861 2862 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 2863 // Returns true if all of the source pointed by src has been copied over to 2864 // the destination buffer pointed by buf. Otherwise, returns false. 2865 // Notes: 2866 // 1. If the length (buflen) of the destination buffer excluding the 2867 // NULL terminator character is not long enough for holding the expanded 2868 // pid characters, it also returns false instead of returning the partially 2869 // expanded one. 2870 // 2. The passed in "buflen" should be large enough to hold the null terminator. 2871 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 2872 char* buf, size_t buflen) { 2873 const char* p = src; 2874 char* b = buf; 2875 const char* src_end = &src[srclen]; 2876 char* buf_end = &buf[buflen - 1]; 2877 2878 while (p < src_end && b < buf_end) { 2879 if (*p == '%') { 2880 switch (*(++p)) { 2881 case '%': // "%%" ==> "%" 2882 *b++ = *p++; 2883 break; 2884 case 'p': { // "%p" ==> current process id 2885 // buf_end points to the character before the last character so 2886 // that we could write '\0' to the end of the buffer. 2887 size_t buf_sz = buf_end - b + 1; 2888 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 2889 2890 // if jio_snprintf fails or the buffer is not long enough to hold 2891 // the expanded pid, returns false. 2892 if (ret < 0 || ret >= (int)buf_sz) { 2893 return false; 2894 } else { 2895 b += ret; 2896 assert(*b == '\0', "fail in copy_expand_pid"); 2897 if (p == src_end && b == buf_end + 1) { 2898 // reach the end of the buffer. 2899 return true; 2900 } 2901 } 2902 p++; 2903 break; 2904 } 2905 default : 2906 *b++ = '%'; 2907 } 2908 } else { 2909 *b++ = *p++; 2910 } 2911 } 2912 *b = '\0'; 2913 return (p == src_end); // return false if not all of the source was copied 2914 }