arguments.cpp revision 62:cd0742ba123c
1/* 2 * Copyright 1997-2007 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 31char** Arguments::_jvm_flags_array = NULL; 32int Arguments::_num_jvm_flags = 0; 33char** Arguments::_jvm_args_array = NULL; 34int Arguments::_num_jvm_args = 0; 35char* Arguments::_java_command = NULL; 36SystemProperty* Arguments::_system_properties = NULL; 37const char* Arguments::_gc_log_filename = NULL; 38bool Arguments::_has_profile = false; 39bool Arguments::_has_alloc_profile = false; 40uintx Arguments::_initial_heap_size = 0; 41uintx Arguments::_min_heap_size = 0; 42Arguments::Mode Arguments::_mode = _mixed; 43bool Arguments::_java_compiler = false; 44bool Arguments::_xdebug_mode = false; 45const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 46const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 47int Arguments::_sun_java_launcher_pid = -1; 48 49// These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) 50bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 51bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 52bool Arguments::_BackgroundCompilation = BackgroundCompilation; 53bool Arguments::_ClipInlining = ClipInlining; 54intx Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 55 56char* Arguments::SharedArchivePath = NULL; 57 58AgentLibraryList Arguments::_libraryList; 59AgentLibraryList Arguments::_agentList; 60 61abort_hook_t Arguments::_abort_hook = NULL; 62exit_hook_t Arguments::_exit_hook = NULL; 63vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 64 65 66SystemProperty *Arguments::_java_ext_dirs = NULL; 67SystemProperty *Arguments::_java_endorsed_dirs = NULL; 68SystemProperty *Arguments::_sun_boot_library_path = NULL; 69SystemProperty *Arguments::_java_library_path = NULL; 70SystemProperty *Arguments::_java_home = NULL; 71SystemProperty *Arguments::_java_class_path = NULL; 72SystemProperty *Arguments::_sun_boot_class_path = NULL; 73 74char* Arguments::_meta_index_path = NULL; 75char* Arguments::_meta_index_dir = NULL; 76 77static bool force_client_mode = false; 78 79// Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string 80 81static 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 92static 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. 99void 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. 119void 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// String containing commands that will be ignored and cause a 157// warning to be issued. These commands should be accepted 158// for 1.6 but not 1.7. The string should be cleared at the 159// beginning of 1.7. 160static const char* obsolete_jvm_flags_1_5_0[] = { 161 "UseTrainGC", 162 "UseSpecialLargeObjectHandling", 163 "UseOversizedCarHandling", 164 "TraceCarAllocation", 165 "PrintTrainGCProcessingStats", 166 "LogOfCarSpaceSize", 167 "OversizedCarThreshold", 168 "MinTickInterval", 169 "DefaultTickInterval", 170 "MaxTickInterval", 171 "DelayTickAdjustment", 172 "ProcessingToTenuringRatio", 173 "MinTrainLength", 174 0}; 175 176bool Arguments::made_obsolete_in_1_5_0(const char *s) { 177 int i = 0; 178 while (obsolete_jvm_flags_1_5_0[i] != NULL) { 179 // <flag>=xxx form 180 // [-|+]<flag> form 181 if ((strncmp(obsolete_jvm_flags_1_5_0[i], s, 182 strlen(obsolete_jvm_flags_1_5_0[i])) == 0) || 183 ((s[0] == '+' || s[0] == '-') && 184 (strncmp(obsolete_jvm_flags_1_5_0[i], &s[1], 185 strlen(obsolete_jvm_flags_1_5_0[i])) == 0))) { 186 return true; 187 } 188 i++; 189 } 190 return false; 191} 192 193// Constructs the system class path (aka boot class path) from the following 194// components, in order: 195// 196// prefix // from -Xbootclasspath/p:... 197// endorsed // the expansion of -Djava.endorsed.dirs=... 198// base // from os::get_system_properties() or -Xbootclasspath= 199// suffix // from -Xbootclasspath/a:... 200// 201// java.endorsed.dirs is a list of directories; any jar or zip files in the 202// directories are added to the sysclasspath just before the base. 203// 204// This could be AllStatic, but it isn't needed after argument processing is 205// complete. 206class SysClassPath: public StackObj { 207public: 208 SysClassPath(const char* base); 209 ~SysClassPath(); 210 211 inline void set_base(const char* base); 212 inline void add_prefix(const char* prefix); 213 inline void add_suffix(const char* suffix); 214 inline void reset_path(const char* base); 215 216 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs 217 // property. Must be called after all command-line arguments have been 218 // processed (in particular, -Djava.endorsed.dirs=...) and before calling 219 // combined_path(). 220 void expand_endorsed(); 221 222 inline const char* get_base() const { return _items[_scp_base]; } 223 inline const char* get_prefix() const { return _items[_scp_prefix]; } 224 inline const char* get_suffix() const { return _items[_scp_suffix]; } 225 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } 226 227 // Combine all the components into a single c-heap-allocated string; caller 228 // must free the string if/when no longer needed. 229 char* combined_path(); 230 231private: 232 // Utility routines. 233 static char* add_to_path(const char* path, const char* str, bool prepend); 234 static char* add_jars_to_path(char* path, const char* directory); 235 236 inline void reset_item_at(int index); 237 238 // Array indices for the items that make up the sysclasspath. All except the 239 // base are allocated in the C heap and freed by this class. 240 enum { 241 _scp_prefix, // from -Xbootclasspath/p:... 242 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... 243 _scp_base, // the default sysclasspath 244 _scp_suffix, // from -Xbootclasspath/a:... 245 _scp_nitems // the number of items, must be last. 246 }; 247 248 const char* _items[_scp_nitems]; 249 DEBUG_ONLY(bool _expansion_done;) 250}; 251 252SysClassPath::SysClassPath(const char* base) { 253 memset(_items, 0, sizeof(_items)); 254 _items[_scp_base] = base; 255 DEBUG_ONLY(_expansion_done = false;) 256} 257 258SysClassPath::~SysClassPath() { 259 // Free everything except the base. 260 for (int i = 0; i < _scp_nitems; ++i) { 261 if (i != _scp_base) reset_item_at(i); 262 } 263 DEBUG_ONLY(_expansion_done = false;) 264} 265 266inline void SysClassPath::set_base(const char* base) { 267 _items[_scp_base] = base; 268} 269 270inline void SysClassPath::add_prefix(const char* prefix) { 271 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); 272} 273 274inline void SysClassPath::add_suffix(const char* suffix) { 275 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); 276} 277 278inline void SysClassPath::reset_item_at(int index) { 279 assert(index < _scp_nitems && index != _scp_base, "just checking"); 280 if (_items[index] != NULL) { 281 FREE_C_HEAP_ARRAY(char, _items[index]); 282 _items[index] = NULL; 283 } 284} 285 286inline void SysClassPath::reset_path(const char* base) { 287 // Clear the prefix and suffix. 288 reset_item_at(_scp_prefix); 289 reset_item_at(_scp_suffix); 290 set_base(base); 291} 292 293//------------------------------------------------------------------------------ 294 295void SysClassPath::expand_endorsed() { 296 assert(_items[_scp_endorsed] == NULL, "can only be called once."); 297 298 const char* path = Arguments::get_property("java.endorsed.dirs"); 299 if (path == NULL) { 300 path = Arguments::get_endorsed_dir(); 301 assert(path != NULL, "no default for java.endorsed.dirs"); 302 } 303 304 char* expanded_path = NULL; 305 const char separator = *os::path_separator(); 306 const char* const end = path + strlen(path); 307 while (path < end) { 308 const char* tmp_end = strchr(path, separator); 309 if (tmp_end == NULL) { 310 expanded_path = add_jars_to_path(expanded_path, path); 311 path = end; 312 } else { 313 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); 314 memcpy(dirpath, path, tmp_end - path); 315 dirpath[tmp_end - path] = '\0'; 316 expanded_path = add_jars_to_path(expanded_path, dirpath); 317 FREE_C_HEAP_ARRAY(char, dirpath); 318 path = tmp_end + 1; 319 } 320 } 321 _items[_scp_endorsed] = expanded_path; 322 DEBUG_ONLY(_expansion_done = true;) 323} 324 325// Combine the bootclasspath elements, some of which may be null, into a single 326// c-heap-allocated string. 327char* SysClassPath::combined_path() { 328 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); 329 assert(_expansion_done, "must call expand_endorsed() first."); 330 331 size_t lengths[_scp_nitems]; 332 size_t total_len = 0; 333 334 const char separator = *os::path_separator(); 335 336 // Get the lengths. 337 int i; 338 for (i = 0; i < _scp_nitems; ++i) { 339 if (_items[i] != NULL) { 340 lengths[i] = strlen(_items[i]); 341 // Include space for the separator char (or a NULL for the last item). 342 total_len += lengths[i] + 1; 343 } 344 } 345 assert(total_len > 0, "empty sysclasspath not allowed"); 346 347 // Copy the _items to a single string. 348 char* cp = NEW_C_HEAP_ARRAY(char, total_len); 349 char* cp_tmp = cp; 350 for (i = 0; i < _scp_nitems; ++i) { 351 if (_items[i] != NULL) { 352 memcpy(cp_tmp, _items[i], lengths[i]); 353 cp_tmp += lengths[i]; 354 *cp_tmp++ = separator; 355 } 356 } 357 *--cp_tmp = '\0'; // Replace the extra separator. 358 return cp; 359} 360 361// Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 362char* 363SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { 364 char *cp; 365 366 assert(str != NULL, "just checking"); 367 if (path == NULL) { 368 size_t len = strlen(str) + 1; 369 cp = NEW_C_HEAP_ARRAY(char, len); 370 memcpy(cp, str, len); // copy the trailing null 371 } else { 372 const char separator = *os::path_separator(); 373 size_t old_len = strlen(path); 374 size_t str_len = strlen(str); 375 size_t len = old_len + str_len + 2; 376 377 if (prepend) { 378 cp = NEW_C_HEAP_ARRAY(char, len); 379 char* cp_tmp = cp; 380 memcpy(cp_tmp, str, str_len); 381 cp_tmp += str_len; 382 *cp_tmp = separator; 383 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null 384 FREE_C_HEAP_ARRAY(char, path); 385 } else { 386 cp = REALLOC_C_HEAP_ARRAY(char, path, len); 387 char* cp_tmp = cp + old_len; 388 *cp_tmp = separator; 389 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null 390 } 391 } 392 return cp; 393} 394 395// Scan the directory and append any jar or zip files found to path. 396// Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 397char* SysClassPath::add_jars_to_path(char* path, const char* directory) { 398 DIR* dir = os::opendir(directory); 399 if (dir == NULL) return path; 400 401 char dir_sep[2] = { '\0', '\0' }; 402 size_t directory_len = strlen(directory); 403 const char fileSep = *os::file_separator(); 404 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; 405 406 /* Scan the directory for jars/zips, appending them to path. */ 407 struct dirent *entry; 408 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); 409 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 410 const char* name = entry->d_name; 411 const char* ext = name + strlen(name) - 4; 412 bool isJarOrZip = ext > name && 413 (os::file_name_strcmp(ext, ".jar") == 0 || 414 os::file_name_strcmp(ext, ".zip") == 0); 415 if (isJarOrZip) { 416 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); 417 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); 418 path = add_to_path(path, jarpath, false); 419 FREE_C_HEAP_ARRAY(char, jarpath); 420 } 421 } 422 FREE_C_HEAP_ARRAY(char, dbuf); 423 os::closedir(dir); 424 return path; 425} 426 427// Parses a memory size specification string. 428static bool atomll(const char *s, jlong* result) { 429 jlong n = 0; 430 int args_read = sscanf(s, os::jlong_format_specifier(), &n); 431 if (args_read != 1) { 432 return false; 433 } 434 while (*s != '\0' && isdigit(*s)) { 435 s++; 436 } 437 // 4705540: illegal if more characters are found after the first non-digit 438 if (strlen(s) > 1) { 439 return false; 440 } 441 switch (*s) { 442 case 'T': case 't': 443 *result = n * G * K; 444 return true; 445 case 'G': case 'g': 446 *result = n * G; 447 return true; 448 case 'M': case 'm': 449 *result = n * M; 450 return true; 451 case 'K': case 'k': 452 *result = n * K; 453 return true; 454 case '\0': 455 *result = n; 456 return true; 457 default: 458 return false; 459 } 460} 461 462Arguments::ArgsRange Arguments::check_memory_size(jlong size, jlong min_size) { 463 if (size < min_size) return arg_too_small; 464 // Check that size will fit in a size_t (only relevant on 32-bit) 465 if ((julong) size > max_uintx) return arg_too_big; 466 return arg_in_range; 467} 468 469// Describe an argument out of range error 470void Arguments::describe_range_error(ArgsRange errcode) { 471 switch(errcode) { 472 case arg_too_big: 473 jio_fprintf(defaultStream::error_stream(), 474 "The specified size exceeds the maximum " 475 "representable size.\n"); 476 break; 477 case arg_too_small: 478 case arg_unreadable: 479 case arg_in_range: 480 // do nothing for now 481 break; 482 default: 483 ShouldNotReachHere(); 484 } 485} 486 487static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { 488 return CommandLineFlags::boolAtPut(name, &value, origin); 489} 490 491 492static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { 493 double v; 494 if (sscanf(value, "%lf", &v) != 1) { 495 return false; 496 } 497 498 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { 499 return true; 500 } 501 return false; 502} 503 504 505static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { 506 jlong v; 507 intx intx_v; 508 bool is_neg = false; 509 // Check the sign first since atomll() parses only unsigned values. 510 if (*value == '-') { 511 if (!CommandLineFlags::intxAt(name, &intx_v)) { 512 return false; 513 } 514 value++; 515 is_neg = true; 516 } 517 if (!atomll(value, &v)) { 518 return false; 519 } 520 intx_v = (intx) v; 521 if (is_neg) { 522 intx_v = -intx_v; 523 } 524 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { 525 return true; 526 } 527 uintx uintx_v = (uintx) v; 528 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { 529 return true; 530 } 531 return false; 532} 533 534 535static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { 536 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; 537 // Contract: CommandLineFlags always returns a pointer that needs freeing. 538 FREE_C_HEAP_ARRAY(char, value); 539 return true; 540} 541 542static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { 543 const char* old_value = ""; 544 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; 545 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 546 size_t new_len = strlen(new_value); 547 const char* value; 548 char* free_this_too = NULL; 549 if (old_len == 0) { 550 value = new_value; 551 } else if (new_len == 0) { 552 value = old_value; 553 } else { 554 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); 555 // each new setting adds another LINE to the switch: 556 sprintf(buf, "%s\n%s", old_value, new_value); 557 value = buf; 558 free_this_too = buf; 559 } 560 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 561 // CommandLineFlags always returns a pointer that needs freeing. 562 FREE_C_HEAP_ARRAY(char, value); 563 if (free_this_too != NULL) { 564 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 565 FREE_C_HEAP_ARRAY(char, free_this_too); 566 } 567 return true; 568} 569 570 571bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { 572 573 // range of acceptable characters spelled out for portability reasons 574#define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 575#define BUFLEN 255 576 char name[BUFLEN+1]; 577 char dummy; 578 579 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 580 return set_bool_flag(name, false, origin); 581 } 582 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 583 return set_bool_flag(name, true, origin); 584 } 585 586 char punct; 587 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 588 const char* value = strchr(arg, '=') + 1; 589 Flag* flag = Flag::find_flag(name, strlen(name)); 590 if (flag != NULL && flag->is_ccstr()) { 591 if (flag->ccstr_accumulates()) { 592 return append_to_string_flag(name, value, origin); 593 } else { 594 if (value[0] == '\0') { 595 value = NULL; 596 } 597 return set_string_flag(name, value, origin); 598 } 599 } 600 } 601 602 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 603 const char* value = strchr(arg, '=') + 1; 604 // -XX:Foo:=xxx will reset the string flag to the given value. 605 if (value[0] == '\0') { 606 value = NULL; 607 } 608 return set_string_flag(name, value, origin); 609 } 610 611#define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" 612#define SIGNED_NUMBER_RANGE "[-0123456789]" 613#define NUMBER_RANGE "[0123456789]" 614 char value[BUFLEN + 1]; 615 char value2[BUFLEN + 1]; 616 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 617 // Looks like a floating-point number -- try again with more lenient format string 618 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 619 return set_fp_numeric_flag(name, value, origin); 620 } 621 } 622 623#define VALUE_RANGE "[-kmgtKMGT0123456789]" 624 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 625 return set_numeric_flag(name, value, origin); 626 } 627 628 return false; 629} 630 631 632void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 633 assert(bldarray != NULL, "illegal argument"); 634 635 if (arg == NULL) { 636 return; 637 } 638 639 int index = *count; 640 641 // expand the array and add arg to the last element 642 (*count)++; 643 if (*bldarray == NULL) { 644 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); 645 } else { 646 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); 647 } 648 (*bldarray)[index] = strdup(arg); 649} 650 651void Arguments::build_jvm_args(const char* arg) { 652 add_string(&_jvm_args_array, &_num_jvm_args, arg); 653} 654 655void Arguments::build_jvm_flags(const char* arg) { 656 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 657} 658 659// utility function to return a string that concatenates all 660// strings in a given char** array 661const char* Arguments::build_resource_string(char** args, int count) { 662 if (args == NULL || count == 0) { 663 return NULL; 664 } 665 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator 666 for (int i = 1; i < count; i++) { 667 length += strlen(args[i]) + 1; // add 1 for a space 668 } 669 char* s = NEW_RESOURCE_ARRAY(char, length); 670 strcpy(s, args[0]); 671 for (int j = 1; j < count; j++) { 672 strcat(s, " "); 673 strcat(s, args[j]); 674 } 675 return (const char*) s; 676} 677 678void Arguments::print_on(outputStream* st) { 679 st->print_cr("VM Arguments:"); 680 if (num_jvm_flags() > 0) { 681 st->print("jvm_flags: "); print_jvm_flags_on(st); 682 } 683 if (num_jvm_args() > 0) { 684 st->print("jvm_args: "); print_jvm_args_on(st); 685 } 686 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 687 st->print_cr("Launcher Type: %s", _sun_java_launcher); 688} 689 690void Arguments::print_jvm_flags_on(outputStream* st) { 691 if (_num_jvm_flags > 0) { 692 for (int i=0; i < _num_jvm_flags; i++) { 693 st->print("%s ", _jvm_flags_array[i]); 694 } 695 st->print_cr(""); 696 } 697} 698 699void Arguments::print_jvm_args_on(outputStream* st) { 700 if (_num_jvm_args > 0) { 701 for (int i=0; i < _num_jvm_args; i++) { 702 st->print("%s ", _jvm_args_array[i]); 703 } 704 st->print_cr(""); 705 } 706} 707 708bool Arguments::process_argument(const char* arg, jboolean ignore_unrecognized, FlagValueOrigin origin) { 709 710 if (parse_argument(arg, origin)) { 711 // do nothing 712 } else if (made_obsolete_in_1_5_0(arg)) { 713 jio_fprintf(defaultStream::error_stream(), 714 "Warning: The flag %s has been EOL'd as of 1.5.0 and will" 715 " be ignored\n", arg); 716 } else { 717 if (!ignore_unrecognized) { 718 jio_fprintf(defaultStream::error_stream(), 719 "Unrecognized VM option '%s'\n", arg); 720 // allow for commandline "commenting out" options like -XX:#+Verbose 721 if (strlen(arg) == 0 || arg[0] != '#') { 722 return false; 723 } 724 } 725 } 726 return true; 727} 728 729 730bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 731 FILE* stream = fopen(file_name, "rb"); 732 if (stream == NULL) { 733 if (should_exist) { 734 jio_fprintf(defaultStream::error_stream(), 735 "Could not open settings file %s\n", file_name); 736 return false; 737 } else { 738 return true; 739 } 740 } 741 742 char token[1024]; 743 int pos = 0; 744 745 bool in_white_space = true; 746 bool in_comment = false; 747 bool in_quote = false; 748 char quote_c = 0; 749 bool result = true; 750 751 int c = getc(stream); 752 while(c != EOF) { 753 if (in_white_space) { 754 if (in_comment) { 755 if (c == '\n') in_comment = false; 756 } else { 757 if (c == '#') in_comment = true; 758 else if (!isspace(c)) { 759 in_white_space = false; 760 token[pos++] = c; 761 } 762 } 763 } else { 764 if (c == '\n' || (!in_quote && isspace(c))) { 765 // token ends at newline, or at unquoted whitespace 766 // this allows a way to include spaces in string-valued options 767 token[pos] = '\0'; 768 logOption(token); 769 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); 770 build_jvm_flags(token); 771 pos = 0; 772 in_white_space = true; 773 in_quote = false; 774 } else if (!in_quote && (c == '\'' || c == '"')) { 775 in_quote = true; 776 quote_c = c; 777 } else if (in_quote && (c == quote_c)) { 778 in_quote = false; 779 } else { 780 token[pos++] = c; 781 } 782 } 783 c = getc(stream); 784 } 785 if (pos > 0) { 786 token[pos] = '\0'; 787 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); 788 build_jvm_flags(token); 789 } 790 fclose(stream); 791 return result; 792} 793 794//============================================================================================================= 795// Parsing of properties (-D) 796 797const char* Arguments::get_property(const char* key) { 798 return PropertyList_get_value(system_properties(), key); 799} 800 801bool Arguments::add_property(const char* prop) { 802 const char* eq = strchr(prop, '='); 803 char* key; 804 // ns must be static--its address may be stored in a SystemProperty object. 805 const static char ns[1] = {0}; 806 char* value = (char *)ns; 807 808 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); 809 key = AllocateHeap(key_len + 1, "add_property"); 810 strncpy(key, prop, key_len); 811 key[key_len] = '\0'; 812 813 if (eq != NULL) { 814 size_t value_len = strlen(prop) - key_len - 1; 815 value = AllocateHeap(value_len + 1, "add_property"); 816 strncpy(value, &prop[key_len + 1], value_len + 1); 817 } 818 819 if (strcmp(key, "java.compiler") == 0) { 820 process_java_compiler_argument(value); 821 FreeHeap(key); 822 if (eq != NULL) { 823 FreeHeap(value); 824 } 825 return true; 826 } 827 else if (strcmp(key, "sun.java.command") == 0) { 828 829 _java_command = value; 830 831 // don't add this property to the properties exposed to the java application 832 FreeHeap(key); 833 return true; 834 } 835 else if (strcmp(key, "sun.java.launcher.pid") == 0) { 836 // launcher.pid property is private and is processed 837 // in process_sun_java_launcher_properties(); 838 // the sun.java.launcher property is passed on to the java application 839 FreeHeap(key); 840 if (eq != NULL) { 841 FreeHeap(value); 842 } 843 return true; 844 } 845 else if (strcmp(key, "java.vendor.url.bug") == 0) { 846 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 847 // its value without going through the property list or making a Java call. 848 _java_vendor_url_bug = value; 849 } 850 851 // Create new property and add at the end of the list 852 PropertyList_unique_add(&_system_properties, key, value); 853 return true; 854} 855 856//=========================================================================================================== 857// Setting int/mixed/comp mode flags 858 859void Arguments::set_mode_flags(Mode mode) { 860 // Set up default values for all flags. 861 // If you add a flag to any of the branches below, 862 // add a default value for it here. 863 set_java_compiler(false); 864 _mode = mode; 865 866 // Ensure Agent_OnLoad has the correct initial values. 867 // This may not be the final mode; mode may change later in onload phase. 868 PropertyList_unique_add(&_system_properties, "java.vm.info", 869 (char*)Abstract_VM_Version::vm_info_string()); 870 871 UseInterpreter = true; 872 UseCompiler = true; 873 UseLoopCounter = true; 874 875 // Default values may be platform/compiler dependent - 876 // use the saved values 877 ClipInlining = Arguments::_ClipInlining; 878 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 879 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 880 BackgroundCompilation = Arguments::_BackgroundCompilation; 881 Tier2CompileThreshold = Arguments::_Tier2CompileThreshold; 882 883 // Change from defaults based on mode 884 switch (mode) { 885 default: 886 ShouldNotReachHere(); 887 break; 888 case _int: 889 UseCompiler = false; 890 UseLoopCounter = false; 891 AlwaysCompileLoopMethods = false; 892 UseOnStackReplacement = false; 893 break; 894 case _mixed: 895 // same as default 896 break; 897 case _comp: 898 UseInterpreter = false; 899 BackgroundCompilation = false; 900 ClipInlining = false; 901 break; 902 } 903} 904 905 906// Conflict: required to use shared spaces (-Xshare:on), but 907// incompatible command line options were chosen. 908 909static void no_shared_spaces() { 910 if (RequireSharedSpaces) { 911 jio_fprintf(defaultStream::error_stream(), 912 "Class data sharing is inconsistent with other specified options.\n"); 913 vm_exit_during_initialization("Unable to use shared archive.", NULL); 914 } else { 915 FLAG_SET_DEFAULT(UseSharedSpaces, false); 916 } 917} 918 919 920// If the user has chosen ParallelGCThreads > 0, we set UseParNewGC 921// if it's not explictly set or unset. If the user has chosen 922// UseParNewGC and not explicitly set ParallelGCThreads we 923// set it, unless this is a single cpu machine. 924void Arguments::set_parnew_gc_flags() { 925 assert(!UseSerialGC && !UseParallelGC, "control point invariant"); 926 927 // Turn off AdaptiveSizePolicy by default for parnew until it is 928 // complete. 929 if (UseParNewGC && 930 FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { 931 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 932 } 933 934 if (FLAG_IS_DEFAULT(UseParNewGC) && ParallelGCThreads > 1) { 935 FLAG_SET_DEFAULT(UseParNewGC, true); 936 } else if (UseParNewGC && ParallelGCThreads == 0) { 937 FLAG_SET_DEFAULT(ParallelGCThreads, 938 Abstract_VM_Version::parallel_worker_threads()); 939 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 940 FLAG_SET_DEFAULT(UseParNewGC, false); 941 } 942 } 943 if (!UseParNewGC) { 944 FLAG_SET_DEFAULT(ParallelGCThreads, 0); 945 } else { 946 no_shared_spaces(); 947 948 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 correspondinly, 949 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 950 // we set them to 1024 and 1024. 951 // See CR 6362902. 952 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 953 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 954 } 955 if (FLAG_IS_DEFAULT(OldPLABSize)) { 956 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 957 } 958 959 // AlwaysTenure flag should make ParNew to promote all at first collection. 960 // See CR 6362902. 961 if (AlwaysTenure) { 962 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); 963 } 964 } 965} 966 967// Adjust some sizes to suit CMS and/or ParNew needs; these work well on 968// sparc/solaris for certain applications, but would gain from 969// further optimization and tuning efforts, and would almost 970// certainly gain from analysis of platform and environment. 971void Arguments::set_cms_and_parnew_gc_flags() { 972 if (UseSerialGC || UseParallelGC) { 973 return; 974 } 975 976 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 977 978 // If we are using CMS, we prefer to UseParNewGC, 979 // unless explicitly forbidden. 980 if (!UseParNewGC && FLAG_IS_DEFAULT(UseParNewGC)) { 981 FLAG_SET_ERGO(bool, UseParNewGC, true); 982 } 983 984 // Turn off AdaptiveSizePolicy by default for cms until it is 985 // complete. 986 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { 987 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 988 } 989 990 // In either case, adjust ParallelGCThreads and/or UseParNewGC 991 // as needed. 992 if (UseParNewGC) { 993 set_parnew_gc_flags(); 994 } 995 996 // Now make adjustments for CMS 997 size_t young_gen_per_worker; 998 intx new_ratio; 999 size_t min_new_default; 1000 intx tenuring_default; 1001 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 1002 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { 1003 FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); 1004 } 1005 young_gen_per_worker = 4*M; 1006 new_ratio = (intx)15; 1007 min_new_default = 4*M; 1008 tenuring_default = (intx)0; 1009 } else { // new defaults: "new" as of 6.0 1010 young_gen_per_worker = CMSYoungGenPerWorker; 1011 new_ratio = (intx)7; 1012 min_new_default = 16*M; 1013 tenuring_default = (intx)4; 1014 } 1015 1016 // Preferred young gen size for "short" pauses 1017 const uintx parallel_gc_threads = 1018 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); 1019 const size_t preferred_max_new_size_unaligned = 1020 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); 1021 const size_t preferred_max_new_size = 1022 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1023 1024 // Unless explicitly requested otherwise, size young gen 1025 // for "short" pauses ~ 4M*ParallelGCThreads 1026 if (FLAG_IS_DEFAULT(MaxNewSize)) { // MaxNewSize not set at command-line 1027 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1028 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1029 } else { 1030 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); 1031 } 1032 if(PrintGCDetails && Verbose) { 1033 // Too early to use gclog_or_tty 1034 tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1035 } 1036 } 1037 // Unless explicitly requested otherwise, prefer a large 1038 // Old to Young gen size so as to shift the collection load 1039 // to the old generation concurrent collector 1040 if (FLAG_IS_DEFAULT(NewRatio)) { 1041 FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); 1042 1043 size_t min_new = align_size_up(ScaleForWordSize(min_new_default), os::vm_page_size()); 1044 size_t prev_initial_size = initial_heap_size(); 1045 if (prev_initial_size != 0 && prev_initial_size < min_new+OldSize) { 1046 set_initial_heap_size(min_new+OldSize); 1047 // Currently minimum size and the initial heap sizes are the same. 1048 set_min_heap_size(initial_heap_size()); 1049 if (PrintGCDetails && Verbose) { 1050 warning("Initial heap size increased to " SIZE_FORMAT " M from " 1051 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", 1052 initial_heap_size()/M, prev_initial_size/M); 1053 } 1054 } 1055 // MaxHeapSize is aligned down in collectorPolicy 1056 size_t max_heap = align_size_down(MaxHeapSize, 1057 CardTableRS::ct_max_alignment_constraint()); 1058 1059 if(PrintGCDetails && Verbose) { 1060 // Too early to use gclog_or_tty 1061 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT 1062 " initial_heap_size: " SIZE_FORMAT 1063 " max_heap: " SIZE_FORMAT, 1064 min_heap_size(), initial_heap_size(), max_heap); 1065 } 1066 if (max_heap > min_new) { 1067 // Unless explicitly requested otherwise, make young gen 1068 // at least min_new, and at most preferred_max_new_size. 1069 if (FLAG_IS_DEFAULT(NewSize)) { 1070 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); 1071 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); 1072 if(PrintGCDetails && Verbose) { 1073 // Too early to use gclog_or_tty 1074 tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); 1075 } 1076 } 1077 // Unless explicitly requested otherwise, size old gen 1078 // so that it's at least 3X of NewSize to begin with; 1079 // later NewRatio will decide how it grows; see above. 1080 if (FLAG_IS_DEFAULT(OldSize)) { 1081 if (max_heap > NewSize) { 1082 FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); 1083 if(PrintGCDetails && Verbose) { 1084 // Too early to use gclog_or_tty 1085 tty->print_cr("Ergo set OldSize: " SIZE_FORMAT, OldSize); 1086 } 1087 } 1088 } 1089 } 1090 } 1091 // Unless explicitly requested otherwise, definitely 1092 // promote all objects surviving "tenuring_default" scavenges. 1093 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1094 FLAG_IS_DEFAULT(SurvivorRatio)) { 1095 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); 1096 } 1097 // If we decided above (or user explicitly requested) 1098 // `promote all' (via MaxTenuringThreshold := 0), 1099 // prefer minuscule survivor spaces so as not to waste 1100 // space for (non-existent) survivors 1101 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1102 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); 1103 } 1104 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, 1105 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. 1106 // This is done in order to make ParNew+CMS configuration to work 1107 // with YoungPLABSize and OldPLABSize options. 1108 // See CR 6362902. 1109 if (!FLAG_IS_DEFAULT(OldPLABSize)) { 1110 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1111 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim 1112 // is. In this situtation let CMSParPromoteBlocksToClaim follow 1113 // the value (either from the command line or ergonomics) of 1114 // OldPLABSize. Following OldPLABSize is an ergonomics decision. 1115 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); 1116 } 1117 else { 1118 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. 1119 // CMSParPromoteBlocksToClaim is a collector-specific flag, so 1120 // we'll let it to take precedence. 1121 jio_fprintf(defaultStream::error_stream(), 1122 "Both OldPLABSize and CMSParPromoteBlocksToClaim options are specified " 1123 "for the CMS collector. CMSParPromoteBlocksToClaim will take precedence.\n"); 1124 } 1125 } 1126} 1127 1128bool Arguments::should_auto_select_low_pause_collector() { 1129 if (UseAutoGCSelectPolicy && 1130 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1131 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1132 if (PrintGCDetails) { 1133 // Cannot use gclog_or_tty yet. 1134 tty->print_cr("Automatic selection of the low pause collector" 1135 " based on pause goal of %d (ms)", MaxGCPauseMillis); 1136 } 1137 return true; 1138 } 1139 return false; 1140} 1141 1142void Arguments::set_ergonomics_flags() { 1143 // Parallel GC is not compatible with sharing. If one specifies 1144 // that they want sharing explicitly, do not set ergonmics flags. 1145 if (DumpSharedSpaces || ForceSharedSpaces) { 1146 return; 1147 } 1148 1149 if (os::is_server_class_machine() && !force_client_mode ) { 1150 // If no other collector is requested explicitly, 1151 // let the VM select the collector based on 1152 // machine class and automatic selection policy. 1153 if (!UseSerialGC && 1154 !UseConcMarkSweepGC && 1155 !UseParNewGC && 1156 !DumpSharedSpaces && 1157 FLAG_IS_DEFAULT(UseParallelGC)) { 1158 if (should_auto_select_low_pause_collector()) { 1159 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1160 } else { 1161 FLAG_SET_ERGO(bool, UseParallelGC, true); 1162 } 1163 no_shared_spaces(); 1164 } 1165 } 1166} 1167 1168void Arguments::set_parallel_gc_flags() { 1169 // If parallel old was requested, automatically enable parallel scavenge. 1170 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { 1171 FLAG_SET_DEFAULT(UseParallelGC, true); 1172 } 1173 1174 // If no heap maximum was requested explicitly, use some reasonable fraction 1175 // of the physical memory, up to a maximum of 1GB. 1176 if (UseParallelGC) { 1177 FLAG_SET_ERGO(uintx, ParallelGCThreads, 1178 Abstract_VM_Version::parallel_worker_threads()); 1179 1180 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1181 const uint64_t reasonable_fraction = 1182 os::physical_memory() / DefaultMaxRAMFraction; 1183 const uint64_t maximum_size = (uint64_t) DefaultMaxRAM; 1184 size_t reasonable_max = 1185 (size_t) os::allocatable_physical_memory(reasonable_fraction); 1186 if (reasonable_max > maximum_size) { 1187 reasonable_max = maximum_size; 1188 } 1189 if (PrintGCDetails && Verbose) { 1190 // Cannot use gclog_or_tty yet. 1191 tty->print_cr(" Max heap size for server class platform " 1192 SIZE_FORMAT, reasonable_max); 1193 } 1194 // If the initial_heap_size has not been set with -Xms, 1195 // then set it as fraction of size of physical memory 1196 // respecting the maximum and minimum sizes of the heap. 1197 if (initial_heap_size() == 0) { 1198 const uint64_t reasonable_initial_fraction = 1199 os::physical_memory() / DefaultInitialRAMFraction; 1200 const size_t reasonable_initial = 1201 (size_t) os::allocatable_physical_memory(reasonable_initial_fraction); 1202 const size_t minimum_size = NewSize + OldSize; 1203 set_initial_heap_size(MAX2(MIN2(reasonable_initial, reasonable_max), 1204 minimum_size)); 1205 // Currently the minimum size and the initial heap sizes are the same. 1206 set_min_heap_size(initial_heap_size()); 1207 if (PrintGCDetails && Verbose) { 1208 // Cannot use gclog_or_tty yet. 1209 tty->print_cr(" Initial heap size for server class platform " 1210 SIZE_FORMAT, initial_heap_size()); 1211 } 1212 } else { 1213 // An minimum size was specified on the command line. Be sure 1214 // that the maximum size is consistent. 1215 if (initial_heap_size() > reasonable_max) { 1216 reasonable_max = initial_heap_size(); 1217 } 1218 } 1219 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx) reasonable_max); 1220 } 1221 1222 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1223 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1224 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1225 // See CR 6362902 for details. 1226 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1227 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1228 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1229 } 1230 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1231 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1232 } 1233 } 1234 1235 if (UseParallelOldGC) { 1236 // Par compact uses lower default values since they are treated as 1237 // minimums. These are different defaults because of the different 1238 // interpretation and are not ergonomically set. 1239 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1240 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1241 } 1242 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { 1243 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); 1244 } 1245 } 1246 } 1247} 1248 1249// This must be called after ergonomics because we want bytecode rewriting 1250// if the server compiler is used, or if UseSharedSpaces is disabled. 1251void Arguments::set_bytecode_flags() { 1252 // Better not attempt to store into a read-only space. 1253 if (UseSharedSpaces) { 1254 FLAG_SET_DEFAULT(RewriteBytecodes, false); 1255 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1256 } 1257 1258 if (!RewriteBytecodes) { 1259 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1260 } 1261} 1262 1263// Aggressive optimization flags -XX:+AggressiveOpts 1264void Arguments::set_aggressive_opts_flags() { 1265#ifdef COMPILER2 1266 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1267 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1268 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1269 } 1270 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1271 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1272 } 1273 1274 // Feed the cache size setting into the JDK 1275 char buffer[1024]; 1276 sprintf(buffer, "java.lang.Integer.IntegerCache.high=%d", AutoBoxCacheMax); 1277 add_property(buffer); 1278 } 1279#endif 1280 1281 if (AggressiveOpts) { 1282// Sample flag setting code 1283// if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1284// FLAG_SET_DEFAULT(EliminateZeroing, true); 1285// } 1286 } 1287} 1288 1289//=========================================================================================================== 1290// Parsing of java.compiler property 1291 1292void Arguments::process_java_compiler_argument(char* arg) { 1293 // For backwards compatibility, Djava.compiler=NONE or "" 1294 // causes us to switch to -Xint mode UNLESS -Xdebug 1295 // is also specified. 1296 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1297 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1298 } 1299} 1300 1301void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 1302 _sun_java_launcher = strdup(launcher); 1303} 1304 1305bool Arguments::created_by_java_launcher() { 1306 assert(_sun_java_launcher != NULL, "property must have value"); 1307 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 1308} 1309 1310//=========================================================================================================== 1311// Parsing of main arguments 1312 1313bool Arguments::verify_percentage(uintx value, const char* name) { 1314 if (value <= 100) { 1315 return true; 1316 } 1317 jio_fprintf(defaultStream::error_stream(), 1318 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 1319 name, value); 1320 return false; 1321} 1322 1323static void set_serial_gc_flags() { 1324 FLAG_SET_DEFAULT(UseSerialGC, true); 1325 FLAG_SET_DEFAULT(UseParNewGC, false); 1326 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); 1327 FLAG_SET_DEFAULT(UseParallelGC, false); 1328 FLAG_SET_DEFAULT(UseParallelOldGC, false); 1329} 1330 1331static bool verify_serial_gc_flags() { 1332 return (UseSerialGC && 1333 !(UseParNewGC || UseConcMarkSweepGC || UseParallelGC || 1334 UseParallelOldGC)); 1335} 1336 1337// Check consistency of GC selection 1338bool Arguments::check_gc_consistency() { 1339 bool status = true; 1340 // Ensure that the user has not selected conflicting sets 1341 // of collectors. [Note: this check is merely a user convenience; 1342 // collectors over-ride each other so that only a non-conflicting 1343 // set is selected; however what the user gets is not what they 1344 // may have expected from the combination they asked for. It's 1345 // better to reduce user confusion by not allowing them to 1346 // select conflicting combinations. 1347 uint i = 0; 1348 if (UseSerialGC) i++; 1349 if (UseConcMarkSweepGC || UseParNewGC) i++; 1350 if (UseParallelGC || UseParallelOldGC) i++; 1351 if (i > 1) { 1352 jio_fprintf(defaultStream::error_stream(), 1353 "Conflicting collector combinations in option list; " 1354 "please refer to the release notes for the combinations " 1355 "allowed\n"); 1356 status = false; 1357 } 1358 1359 return status; 1360} 1361 1362// Check the consistency of vm_init_args 1363bool Arguments::check_vm_args_consistency() { 1364 // Method for adding checks for flag consistency. 1365 // The intent is to warn the user of all possible conflicts, 1366 // before returning an error. 1367 // Note: Needs platform-dependent factoring. 1368 bool status = true; 1369 1370#if ( (defined(COMPILER2) && defined(SPARC))) 1371 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init 1372 // on sparc doesn't require generation of a stub as is the case on, e.g., 1373 // x86. Normally, VM_Version_init must be called from init_globals in 1374 // init.cpp, which is called by the initial java thread *after* arguments 1375 // have been parsed. VM_Version_init gets called twice on sparc. 1376 extern void VM_Version_init(); 1377 VM_Version_init(); 1378 if (!VM_Version::has_v9()) { 1379 jio_fprintf(defaultStream::error_stream(), 1380 "V8 Machine detected, Server requires V9\n"); 1381 status = false; 1382 } 1383#endif /* COMPILER2 && SPARC */ 1384 1385 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product 1386 // builds so the cost of stack banging can be measured. 1387#if (defined(PRODUCT) && defined(SOLARIS)) 1388 if (!UseBoundThreads && !UseStackBanging) { 1389 jio_fprintf(defaultStream::error_stream(), 1390 "-UseStackBanging conflicts with -UseBoundThreads\n"); 1391 1392 status = false; 1393 } 1394#endif 1395 1396 if (TLABRefillWasteFraction == 0) { 1397 jio_fprintf(defaultStream::error_stream(), 1398 "TLABRefillWasteFraction should be a denominator, " 1399 "not " SIZE_FORMAT "\n", 1400 TLABRefillWasteFraction); 1401 status = false; 1402 } 1403 1404 status = status && verify_percentage(MaxLiveObjectEvacuationRatio, 1405 "MaxLiveObjectEvacuationRatio"); 1406 status = status && verify_percentage(AdaptiveSizePolicyWeight, 1407 "AdaptiveSizePolicyWeight"); 1408 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); 1409 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 1410 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); 1411 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); 1412 1413 if (MinHeapFreeRatio > MaxHeapFreeRatio) { 1414 jio_fprintf(defaultStream::error_stream(), 1415 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 1416 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", 1417 MinHeapFreeRatio, MaxHeapFreeRatio); 1418 status = false; 1419 } 1420 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1421 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); 1422 1423 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 1424 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 1425 } 1426 1427 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1428 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); 1429 if (GCTimeLimit == 100) { 1430 // Turn off gc-overhead-limit-exceeded checks 1431 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 1432 } 1433 1434 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1435 1436 // Check user specified sharing option conflict with Parallel GC 1437 bool cannot_share = (UseConcMarkSweepGC || UseParallelGC || 1438 UseParallelOldGC || UseParNewGC || 1439 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); 1440 1441 if (cannot_share) { 1442 // Either force sharing on by forcing the other options off, or 1443 // force sharing off. 1444 if (DumpSharedSpaces || ForceSharedSpaces) { 1445 set_serial_gc_flags(); 1446 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); 1447 } else { 1448 no_shared_spaces(); 1449 } 1450 } 1451 1452 status = status && check_gc_consistency(); 1453 1454 if (_has_alloc_profile) { 1455 if (UseParallelGC || UseParallelOldGC) { 1456 jio_fprintf(defaultStream::error_stream(), 1457 "error: invalid argument combination.\n" 1458 "Allocation profiling (-Xaprof) cannot be used together with " 1459 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); 1460 status = false; 1461 } 1462 if (UseConcMarkSweepGC) { 1463 jio_fprintf(defaultStream::error_stream(), 1464 "error: invalid argument combination.\n" 1465 "Allocation profiling (-Xaprof) cannot be used together with " 1466 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); 1467 status = false; 1468 } 1469 } 1470 1471 if (CMSIncrementalMode) { 1472 if (!UseConcMarkSweepGC) { 1473 jio_fprintf(defaultStream::error_stream(), 1474 "error: invalid argument combination.\n" 1475 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 1476 "selected in order\nto use CMSIncrementalMode.\n"); 1477 status = false; 1478 } else if (!UseTLAB) { 1479 jio_fprintf(defaultStream::error_stream(), 1480 "error: CMSIncrementalMode requires thread-local " 1481 "allocation buffers\n(-XX:+UseTLAB).\n"); 1482 status = false; 1483 } else { 1484 status = status && verify_percentage(CMSIncrementalDutyCycle, 1485 "CMSIncrementalDutyCycle"); 1486 status = status && verify_percentage(CMSIncrementalDutyCycleMin, 1487 "CMSIncrementalDutyCycleMin"); 1488 status = status && verify_percentage(CMSIncrementalSafetyFactor, 1489 "CMSIncrementalSafetyFactor"); 1490 status = status && verify_percentage(CMSIncrementalOffset, 1491 "CMSIncrementalOffset"); 1492 status = status && verify_percentage(CMSExpAvgFactor, 1493 "CMSExpAvgFactor"); 1494 // If it was not set on the command line, set 1495 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 1496 if (CMSInitiatingOccupancyFraction < 0) { 1497 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 1498 } 1499 } 1500 } 1501 1502 if (UseNUMA && !UseTLAB) { 1503 jio_fprintf(defaultStream::error_stream(), 1504 "error: NUMA allocator (-XX:+UseNUMA) requires thread-local " 1505 "allocation\nbuffers (-XX:+UseTLAB).\n"); 1506 status = false; 1507 } 1508 1509 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 1510 // insists that we hold the requisite locks so that the iteration is 1511 // MT-safe. For the verification at start-up and shut-down, we don't 1512 // yet have a good way of acquiring and releasing these locks, 1513 // which are not visible at the CollectedHeap level. We want to 1514 // be able to acquire these locks and then do the iteration rather 1515 // than just disable the lock verification. This will be fixed under 1516 // bug 4788986. 1517 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 1518 if (VerifyGCStartAt == 0) { 1519 warning("Heap verification at start-up disabled " 1520 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1521 VerifyGCStartAt = 1; // Disable verification at start-up 1522 } 1523 if (VerifyBeforeExit) { 1524 warning("Heap verification at shutdown disabled " 1525 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1526 VerifyBeforeExit = false; // Disable verification at shutdown 1527 } 1528 } 1529 1530 // Note: only executed in non-PRODUCT mode 1531 if (!UseAsyncConcMarkSweepGC && 1532 (ExplicitGCInvokesConcurrent || 1533 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 1534 jio_fprintf(defaultStream::error_stream(), 1535 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" 1536 " with -UseAsyncConcMarkSweepGC"); 1537 status = false; 1538 } 1539 1540 return status; 1541} 1542 1543bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 1544 const char* option_type) { 1545 if (ignore) return false; 1546 1547 const char* spacer = " "; 1548 if (option_type == NULL) { 1549 option_type = ++spacer; // Set both to the empty string. 1550 } 1551 1552 if (os::obsolete_option(option)) { 1553 jio_fprintf(defaultStream::error_stream(), 1554 "Obsolete %s%soption: %s\n", option_type, spacer, 1555 option->optionString); 1556 return false; 1557 } else { 1558 jio_fprintf(defaultStream::error_stream(), 1559 "Unrecognized %s%soption: %s\n", option_type, spacer, 1560 option->optionString); 1561 return true; 1562 } 1563} 1564 1565static const char* user_assertion_options[] = { 1566 "-da", "-ea", "-disableassertions", "-enableassertions", 0 1567}; 1568 1569static const char* system_assertion_options[] = { 1570 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 1571}; 1572 1573// Return true if any of the strings in null-terminated array 'names' matches. 1574// If tail_allowed is true, then the tail must begin with a colon; otherwise, 1575// the option must match exactly. 1576static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 1577 bool tail_allowed) { 1578 for (/* empty */; *names != NULL; ++names) { 1579 if (match_option(option, *names, tail)) { 1580 if (**tail == '\0' || tail_allowed && **tail == ':') { 1581 return true; 1582 } 1583 } 1584 } 1585 return false; 1586} 1587 1588Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 1589 jlong* long_arg, 1590 jlong min_size) { 1591 if (!atomll(s, long_arg)) return arg_unreadable; 1592 return check_memory_size(*long_arg, min_size); 1593} 1594 1595// Parse JavaVMInitArgs structure 1596 1597jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 1598 // For components of the system classpath. 1599 SysClassPath scp(Arguments::get_sysclasspath()); 1600 bool scp_assembly_required = false; 1601 1602 // Save default settings for some mode flags 1603 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 1604 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 1605 Arguments::_ClipInlining = ClipInlining; 1606 Arguments::_BackgroundCompilation = BackgroundCompilation; 1607 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 1608 1609 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 1610 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 1611 if (result != JNI_OK) { 1612 return result; 1613 } 1614 1615 // Parse JavaVMInitArgs structure passed in 1616 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); 1617 if (result != JNI_OK) { 1618 return result; 1619 } 1620 1621 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 1622 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 1623 if (result != JNI_OK) { 1624 return result; 1625 } 1626 1627 // Do final processing now that all arguments have been parsed 1628 result = finalize_vm_init_args(&scp, scp_assembly_required); 1629 if (result != JNI_OK) { 1630 return result; 1631 } 1632 1633 return JNI_OK; 1634} 1635 1636 1637jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 1638 SysClassPath* scp_p, 1639 bool* scp_assembly_required_p, 1640 FlagValueOrigin origin) { 1641 // Remaining part of option string 1642 const char* tail; 1643 1644 // iterate over arguments 1645 for (int index = 0; index < args->nOptions; index++) { 1646 bool is_absolute_path = false; // for -agentpath vs -agentlib 1647 1648 const JavaVMOption* option = args->options + index; 1649 1650 if (!match_option(option, "-Djava.class.path", &tail) && 1651 !match_option(option, "-Dsun.java.command", &tail) && 1652 !match_option(option, "-Dsun.java.launcher", &tail)) { 1653 1654 // add all jvm options to the jvm_args string. This string 1655 // is used later to set the java.vm.args PerfData string constant. 1656 // the -Djava.class.path and the -Dsun.java.command options are 1657 // omitted from jvm_args string as each have their own PerfData 1658 // string constant object. 1659 build_jvm_args(option->optionString); 1660 } 1661 1662 // -verbose:[class/gc/jni] 1663 if (match_option(option, "-verbose", &tail)) { 1664 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 1665 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 1666 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1667 } else if (!strcmp(tail, ":gc")) { 1668 FLAG_SET_CMDLINE(bool, PrintGC, true); 1669 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1670 } else if (!strcmp(tail, ":jni")) { 1671 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 1672 } 1673 // -da / -ea / -disableassertions / -enableassertions 1674 // These accept an optional class/package name separated by a colon, e.g., 1675 // -da:java.lang.Thread. 1676 } else if (match_option(option, user_assertion_options, &tail, true)) { 1677 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1678 if (*tail == '\0') { 1679 JavaAssertions::setUserClassDefault(enable); 1680 } else { 1681 assert(*tail == ':', "bogus match by match_option()"); 1682 JavaAssertions::addOption(tail + 1, enable); 1683 } 1684 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 1685 } else if (match_option(option, system_assertion_options, &tail, false)) { 1686 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1687 JavaAssertions::setSystemClassDefault(enable); 1688 // -bootclasspath: 1689 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 1690 scp_p->reset_path(tail); 1691 *scp_assembly_required_p = true; 1692 // -bootclasspath/a: 1693 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 1694 scp_p->add_suffix(tail); 1695 *scp_assembly_required_p = true; 1696 // -bootclasspath/p: 1697 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 1698 scp_p->add_prefix(tail); 1699 *scp_assembly_required_p = true; 1700 // -Xrun 1701 } else if (match_option(option, "-Xrun", &tail)) { 1702 if(tail != NULL) { 1703 const char* pos = strchr(tail, ':'); 1704 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1705 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1706 name[len] = '\0'; 1707 1708 char *options = NULL; 1709 if(pos != NULL) { 1710 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 1711 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); 1712 } 1713#ifdef JVMTI_KERNEL 1714 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1715 warning("profiling and debugging agents are not supported with Kernel VM"); 1716 } else 1717#endif // JVMTI_KERNEL 1718 add_init_library(name, options); 1719 } 1720 // -agentlib and -agentpath 1721 } else if (match_option(option, "-agentlib:", &tail) || 1722 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 1723 if(tail != NULL) { 1724 const char* pos = strchr(tail, '='); 1725 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1726 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1727 name[len] = '\0'; 1728 1729 char *options = NULL; 1730 if(pos != NULL) { 1731 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); 1732 } 1733#ifdef JVMTI_KERNEL 1734 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1735 warning("profiling and debugging agents are not supported with Kernel VM"); 1736 } else 1737#endif // JVMTI_KERNEL 1738 add_init_agent(name, options, is_absolute_path); 1739 1740 } 1741 // -javaagent 1742 } else if (match_option(option, "-javaagent:", &tail)) { 1743 if(tail != NULL) { 1744 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); 1745 add_init_agent("instrument", options, false); 1746 } 1747 // -Xnoclassgc 1748 } else if (match_option(option, "-Xnoclassgc", &tail)) { 1749 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 1750 // -Xincgc: i-CMS 1751 } else if (match_option(option, "-Xincgc", &tail)) { 1752 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1753 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 1754 // -Xnoincgc: no i-CMS 1755 } else if (match_option(option, "-Xnoincgc", &tail)) { 1756 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1757 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 1758 // -Xconcgc 1759 } else if (match_option(option, "-Xconcgc", &tail)) { 1760 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1761 // -Xnoconcgc 1762 } else if (match_option(option, "-Xnoconcgc", &tail)) { 1763 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1764 // -Xbatch 1765 } else if (match_option(option, "-Xbatch", &tail)) { 1766 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1767 // -Xmn for compatibility with other JVM vendors 1768 } else if (match_option(option, "-Xmn", &tail)) { 1769 jlong long_initial_eden_size = 0; 1770 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); 1771 if (errcode != arg_in_range) { 1772 jio_fprintf(defaultStream::error_stream(), 1773 "Invalid initial eden size: %s\n", option->optionString); 1774 describe_range_error(errcode); 1775 return JNI_EINVAL; 1776 } 1777 FLAG_SET_CMDLINE(uintx, MaxNewSize, (size_t) long_initial_eden_size); 1778 FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size); 1779 // -Xms 1780 } else if (match_option(option, "-Xms", &tail)) { 1781 jlong long_initial_heap_size = 0; 1782 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); 1783 if (errcode != arg_in_range) { 1784 jio_fprintf(defaultStream::error_stream(), 1785 "Invalid initial heap size: %s\n", option->optionString); 1786 describe_range_error(errcode); 1787 return JNI_EINVAL; 1788 } 1789 set_initial_heap_size((size_t) long_initial_heap_size); 1790 // Currently the minimum size and the initial heap sizes are the same. 1791 set_min_heap_size(initial_heap_size()); 1792 // -Xmx 1793 } else if (match_option(option, "-Xmx", &tail)) { 1794 jlong long_max_heap_size = 0; 1795 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 1796 if (errcode != arg_in_range) { 1797 jio_fprintf(defaultStream::error_stream(), 1798 "Invalid maximum heap size: %s\n", option->optionString); 1799 describe_range_error(errcode); 1800 return JNI_EINVAL; 1801 } 1802 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (size_t) long_max_heap_size); 1803 // Xmaxf 1804 } else if (match_option(option, "-Xmaxf", &tail)) { 1805 int maxf = (int)(atof(tail) * 100); 1806 if (maxf < 0 || maxf > 100) { 1807 jio_fprintf(defaultStream::error_stream(), 1808 "Bad max heap free percentage size: %s\n", 1809 option->optionString); 1810 return JNI_EINVAL; 1811 } else { 1812 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 1813 } 1814 // Xminf 1815 } else if (match_option(option, "-Xminf", &tail)) { 1816 int minf = (int)(atof(tail) * 100); 1817 if (minf < 0 || minf > 100) { 1818 jio_fprintf(defaultStream::error_stream(), 1819 "Bad min heap free percentage size: %s\n", 1820 option->optionString); 1821 return JNI_EINVAL; 1822 } else { 1823 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 1824 } 1825 // -Xss 1826 } else if (match_option(option, "-Xss", &tail)) { 1827 jlong long_ThreadStackSize = 0; 1828 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 1829 if (errcode != arg_in_range) { 1830 jio_fprintf(defaultStream::error_stream(), 1831 "Invalid thread stack size: %s\n", option->optionString); 1832 describe_range_error(errcode); 1833 return JNI_EINVAL; 1834 } 1835 // Internally track ThreadStackSize in units of 1024 bytes. 1836 FLAG_SET_CMDLINE(intx, ThreadStackSize, 1837 round_to((int)long_ThreadStackSize, K) / K); 1838 // -Xoss 1839 } else if (match_option(option, "-Xoss", &tail)) { 1840 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 1841 // -Xmaxjitcodesize 1842 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { 1843 jlong long_ReservedCodeCacheSize = 0; 1844 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1845 InitialCodeCacheSize); 1846 if (errcode != arg_in_range) { 1847 jio_fprintf(defaultStream::error_stream(), 1848 "Invalid maximum code cache size: %s\n", 1849 option->optionString); 1850 describe_range_error(errcode); 1851 return JNI_EINVAL; 1852 } 1853 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 1854 // -green 1855 } else if (match_option(option, "-green", &tail)) { 1856 jio_fprintf(defaultStream::error_stream(), 1857 "Green threads support not available\n"); 1858 return JNI_EINVAL; 1859 // -native 1860 } else if (match_option(option, "-native", &tail)) { 1861 // HotSpot always uses native threads, ignore silently for compatibility 1862 // -Xsqnopause 1863 } else if (match_option(option, "-Xsqnopause", &tail)) { 1864 // EVM option, ignore silently for compatibility 1865 // -Xrs 1866 } else if (match_option(option, "-Xrs", &tail)) { 1867 // Classic/EVM option, new functionality 1868 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 1869 } else if (match_option(option, "-Xusealtsigs", &tail)) { 1870 // change default internal VM signals used - lower case for back compat 1871 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 1872 // -Xoptimize 1873 } else if (match_option(option, "-Xoptimize", &tail)) { 1874 // EVM option, ignore silently for compatibility 1875 // -Xprof 1876 } else if (match_option(option, "-Xprof", &tail)) { 1877#ifndef FPROF_KERNEL 1878 _has_profile = true; 1879#else // FPROF_KERNEL 1880 // do we have to exit? 1881 warning("Kernel VM does not support flat profiling."); 1882#endif // FPROF_KERNEL 1883 // -Xaprof 1884 } else if (match_option(option, "-Xaprof", &tail)) { 1885 _has_alloc_profile = true; 1886 // -Xconcurrentio 1887 } else if (match_option(option, "-Xconcurrentio", &tail)) { 1888 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 1889 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1890 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 1891 FLAG_SET_CMDLINE(bool, UseTLAB, false); 1892 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 1893 1894 // -Xinternalversion 1895 } else if (match_option(option, "-Xinternalversion", &tail)) { 1896 jio_fprintf(defaultStream::output_stream(), "%s\n", 1897 VM_Version::internal_vm_info_string()); 1898 vm_exit(0); 1899#ifndef PRODUCT 1900 // -Xprintflags 1901 } else if (match_option(option, "-Xprintflags", &tail)) { 1902 CommandLineFlags::printFlags(); 1903 vm_exit(0); 1904#endif 1905 // -D 1906 } else if (match_option(option, "-D", &tail)) { 1907 if (!add_property(tail)) { 1908 return JNI_ENOMEM; 1909 } 1910 // Out of the box management support 1911 if (match_option(option, "-Dcom.sun.management", &tail)) { 1912 FLAG_SET_CMDLINE(bool, ManagementServer, true); 1913 } 1914 // -Xint 1915 } else if (match_option(option, "-Xint", &tail)) { 1916 set_mode_flags(_int); 1917 // -Xmixed 1918 } else if (match_option(option, "-Xmixed", &tail)) { 1919 set_mode_flags(_mixed); 1920 // -Xcomp 1921 } else if (match_option(option, "-Xcomp", &tail)) { 1922 // for testing the compiler; turn off all flags that inhibit compilation 1923 set_mode_flags(_comp); 1924 1925 // -Xshare:dump 1926 } else if (match_option(option, "-Xshare:dump", &tail)) { 1927#ifdef TIERED 1928 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1929 set_mode_flags(_int); // Prevent compilation, which creates objects 1930#elif defined(COMPILER2) 1931 vm_exit_during_initialization( 1932 "Dumping a shared archive is not supported on the Server JVM.", NULL); 1933#elif defined(KERNEL) 1934 vm_exit_during_initialization( 1935 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); 1936#else 1937 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1938 set_mode_flags(_int); // Prevent compilation, which creates objects 1939#endif 1940 // -Xshare:on 1941 } else if (match_option(option, "-Xshare:on", &tail)) { 1942 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1943 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 1944#ifdef TIERED 1945 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); 1946#endif // TIERED 1947 // -Xshare:auto 1948 } else if (match_option(option, "-Xshare:auto", &tail)) { 1949 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1950 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 1951 // -Xshare:off 1952 } else if (match_option(option, "-Xshare:off", &tail)) { 1953 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 1954 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 1955 1956 // -Xverify 1957 } else if (match_option(option, "-Xverify", &tail)) { 1958 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 1959 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 1960 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 1961 } else if (strcmp(tail, ":remote") == 0) { 1962 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 1963 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 1964 } else if (strcmp(tail, ":none") == 0) { 1965 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 1966 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 1967 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 1968 return JNI_EINVAL; 1969 } 1970 // -Xdebug 1971 } else if (match_option(option, "-Xdebug", &tail)) { 1972 // note this flag has been used, then ignore 1973 set_xdebug_mode(true); 1974 // -Xnoagent 1975 } else if (match_option(option, "-Xnoagent", &tail)) { 1976 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 1977 } else if (match_option(option, "-Xboundthreads", &tail)) { 1978 // Bind user level threads to kernel threads (Solaris only) 1979 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 1980 } else if (match_option(option, "-Xloggc:", &tail)) { 1981 // Redirect GC output to the file. -Xloggc:<filename> 1982 // ostream_init_log(), when called will use this filename 1983 // to initialize a fileStream. 1984 _gc_log_filename = strdup(tail); 1985 FLAG_SET_CMDLINE(bool, PrintGC, true); 1986 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 1987 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1988 1989 // JNI hooks 1990 } else if (match_option(option, "-Xcheck", &tail)) { 1991 if (!strcmp(tail, ":jni")) { 1992 CheckJNICalls = true; 1993 } else if (is_bad_option(option, args->ignoreUnrecognized, 1994 "check")) { 1995 return JNI_EINVAL; 1996 } 1997 } else if (match_option(option, "vfprintf", &tail)) { 1998 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 1999 } else if (match_option(option, "exit", &tail)) { 2000 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 2001 } else if (match_option(option, "abort", &tail)) { 2002 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 2003 // -XX:+AggressiveHeap 2004 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 2005 2006 // This option inspects the machine and attempts to set various 2007 // parameters to be optimal for long-running, memory allocation 2008 // intensive jobs. It is intended for machines with large 2009 // amounts of cpu and memory. 2010 2011 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 2012 // VM, but we may not be able to represent the total physical memory 2013 // available (like having 8gb of memory on a box but using a 32bit VM). 2014 // Thus, we need to make sure we're using a julong for intermediate 2015 // calculations. 2016 julong initHeapSize; 2017 julong total_memory = os::physical_memory(); 2018 2019 if (total_memory < (julong)256*M) { 2020 jio_fprintf(defaultStream::error_stream(), 2021 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 2022 vm_exit(1); 2023 } 2024 2025 // The heap size is half of available memory, or (at most) 2026 // all of possible memory less 160mb (leaving room for the OS 2027 // when using ISM). This is the maximum; because adaptive sizing 2028 // is turned on below, the actual space used may be smaller. 2029 2030 initHeapSize = MIN2(total_memory / (julong)2, 2031 total_memory - (julong)160*M); 2032 2033 // Make sure that if we have a lot of memory we cap the 32 bit 2034 // process space. The 64bit VM version of this function is a nop. 2035 initHeapSize = os::allocatable_physical_memory(initHeapSize); 2036 2037 // The perm gen is separate but contiguous with the 2038 // object heap (and is reserved with it) so subtract it 2039 // from the heap size. 2040 if (initHeapSize > MaxPermSize) { 2041 initHeapSize = initHeapSize - MaxPermSize; 2042 } else { 2043 warning("AggressiveHeap and MaxPermSize values may conflict"); 2044 } 2045 2046 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2047 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 2048 set_initial_heap_size(MaxHeapSize); 2049 // Currently the minimum size and the initial heap sizes are the same. 2050 set_min_heap_size(initial_heap_size()); 2051 } 2052 if (FLAG_IS_DEFAULT(NewSize)) { 2053 // Make the young generation 3/8ths of the total heap. 2054 FLAG_SET_CMDLINE(uintx, NewSize, 2055 ((julong)MaxHeapSize / (julong)8) * (julong)3); 2056 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 2057 } 2058 2059 FLAG_SET_DEFAULT(UseLargePages, true); 2060 2061 // Increase some data structure sizes for efficiency 2062 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 2063 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2064 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 2065 2066 // See the OldPLABSize comment below, but replace 'after promotion' 2067 // with 'after copying'. YoungPLABSize is the size of the survivor 2068 // space per-gc-thread buffers. The default is 4kw. 2069 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 2070 2071 // OldPLABSize is the size of the buffers in the old gen that 2072 // UseParallelGC uses to promote live data that doesn't fit in the 2073 // survivor spaces. At any given time, there's one for each gc thread. 2074 // The default size is 1kw. These buffers are rarely used, since the 2075 // survivor spaces are usually big enough. For specjbb, however, there 2076 // are occasions when there's lots of live data in the young gen 2077 // and we end up promoting some of it. We don't have a definite 2078 // explanation for why bumping OldPLABSize helps, but the theory 2079 // is that a bigger PLAB results in retaining something like the 2080 // original allocation order after promotion, which improves mutator 2081 // locality. A minor effect may be that larger PLABs reduce the 2082 // number of PLAB allocation events during gc. The value of 8kw 2083 // was arrived at by experimenting with specjbb. 2084 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 2085 2086 // CompilationPolicyChoice=0 causes the server compiler to adopt 2087 // a more conservative which-method-do-I-compile policy when one 2088 // of the counters maintained by the interpreter trips. The 2089 // result is reduced startup time and improved specjbb and 2090 // alacrity performance. Zero is the default, but we set it 2091 // explicitly here in case the default changes. 2092 // See runtime/compilationPolicy.*. 2093 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); 2094 2095 // Enable parallel GC and adaptive generation sizing 2096 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 2097 FLAG_SET_DEFAULT(ParallelGCThreads, 2098 Abstract_VM_Version::parallel_worker_threads()); 2099 2100 // Encourage steady state memory management 2101 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 2102 2103 // This appears to improve mutator locality 2104 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2105 2106 // Get around early Solaris scheduling bug 2107 // (affinity vs other jobs on system) 2108 // but disallow DR and offlining (5008695). 2109 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 2110 2111 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 2112 // The last option must always win. 2113 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 2114 FLAG_SET_CMDLINE(bool, NeverTenure, true); 2115 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 2116 // The last option must always win. 2117 FLAG_SET_CMDLINE(bool, NeverTenure, false); 2118 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 2119 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 2120 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 2121 jio_fprintf(defaultStream::error_stream(), 2122 "Please use CMSClassUnloadingEnabled in place of " 2123 "CMSPermGenSweepingEnabled in the future\n"); 2124 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 2125 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 2126 jio_fprintf(defaultStream::error_stream(), 2127 "Please use -XX:+UseGCOverheadLimit in place of " 2128 "-XX:+UseGCTimeLimit in the future\n"); 2129 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 2130 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 2131 jio_fprintf(defaultStream::error_stream(), 2132 "Please use -XX:-UseGCOverheadLimit in place of " 2133 "-XX:-UseGCTimeLimit in the future\n"); 2134 // The TLE options are for compatibility with 1.3 and will be 2135 // removed without notice in a future release. These options 2136 // are not to be documented. 2137 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 2138 // No longer used. 2139 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 2140 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 2141 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 2142 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2143 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 2144 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 2145 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 2146 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 2147 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 2148 // No longer used. 2149 } else if (match_option(option, "-XX:TLESize=", &tail)) { 2150 jlong long_tlab_size = 0; 2151 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 2152 if (errcode != arg_in_range) { 2153 jio_fprintf(defaultStream::error_stream(), 2154 "Invalid TLAB size: %s\n", option->optionString); 2155 describe_range_error(errcode); 2156 return JNI_EINVAL; 2157 } 2158 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 2159 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 2160 // No longer used. 2161 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 2162 FLAG_SET_CMDLINE(bool, UseTLAB, true); 2163 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 2164 FLAG_SET_CMDLINE(bool, UseTLAB, false); 2165SOLARIS_ONLY( 2166 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { 2167 warning("-XX:+UsePermISM is obsolete."); 2168 FLAG_SET_CMDLINE(bool, UseISM, true); 2169 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { 2170 FLAG_SET_CMDLINE(bool, UseISM, false); 2171) 2172 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 2173 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 2174 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 2175 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 2176 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 2177 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 2178 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 2179#ifdef SOLARIS 2180 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 2181 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 2182 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 2183 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 2184#else // ndef SOLARIS 2185 jio_fprintf(defaultStream::error_stream(), 2186 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); 2187 return JNI_EINVAL; 2188#endif // ndef SOLARIS 2189 } else 2190#ifdef ASSERT 2191 if (match_option(option, "-XX:+FullGCALot", &tail)) { 2192 FLAG_SET_CMDLINE(bool, FullGCALot, true); 2193 // disable scavenge before parallel mark-compact 2194 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2195 } else 2196#endif 2197 if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 2198 julong cms_blocks_to_claim = (julong)atol(tail); 2199 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 2200 jio_fprintf(defaultStream::error_stream(), 2201 "Please use -XX:CMSParPromoteBlocksToClaim in place of " 2202 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 2203 } else 2204 if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 2205 jlong old_plab_size = 0; 2206 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 2207 if (errcode != arg_in_range) { 2208 jio_fprintf(defaultStream::error_stream(), 2209 "Invalid old PLAB size: %s\n", option->optionString); 2210 describe_range_error(errcode); 2211 return JNI_EINVAL; 2212 } 2213 FLAG_SET_CMDLINE(uintx, OldPLABSize, (julong)old_plab_size); 2214 jio_fprintf(defaultStream::error_stream(), 2215 "Please use -XX:OldPLABSize in place of " 2216 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 2217 } else 2218 if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 2219 jlong young_plab_size = 0; 2220 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 2221 if (errcode != arg_in_range) { 2222 jio_fprintf(defaultStream::error_stream(), 2223 "Invalid young PLAB size: %s\n", option->optionString); 2224 describe_range_error(errcode); 2225 return JNI_EINVAL; 2226 } 2227 FLAG_SET_CMDLINE(uintx, YoungPLABSize, (julong)young_plab_size); 2228 jio_fprintf(defaultStream::error_stream(), 2229 "Please use -XX:YoungPLABSize in place of " 2230 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 2231 } else 2232 if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 2233 // Skip -XX:Flags= since that case has already been handled 2234 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 2235 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 2236 return JNI_EINVAL; 2237 } 2238 } 2239 // Unknown option 2240 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 2241 return JNI_ERR; 2242 } 2243 } 2244 2245 return JNI_OK; 2246} 2247 2248jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 2249 // This must be done after all -D arguments have been processed. 2250 scp_p->expand_endorsed(); 2251 2252 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { 2253 // Assemble the bootclasspath elements into the final path. 2254 Arguments::set_sysclasspath(scp_p->combined_path()); 2255 } 2256 2257 // This must be done after all arguments have been processed. 2258 // java_compiler() true means set to "NONE" or empty. 2259 if (java_compiler() && !xdebug_mode()) { 2260 // For backwards compatibility, we switch to interpreted mode if 2261 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 2262 // not specified. 2263 set_mode_flags(_int); 2264 } 2265 if (CompileThreshold == 0) { 2266 set_mode_flags(_int); 2267 } 2268 2269#ifdef TIERED 2270 // If we are using tiered compilation in the tiered vm then c1 will 2271 // do the profiling and we don't want to waste that time in the 2272 // interpreter. 2273 if (TieredCompilation) { 2274 ProfileInterpreter = false; 2275 } else { 2276 // Since we are running vanilla server we must adjust the compile threshold 2277 // unless the user has already adjusted it because the default threshold assumes 2278 // we will run tiered. 2279 2280 if (FLAG_IS_DEFAULT(CompileThreshold)) { 2281 CompileThreshold = Tier2CompileThreshold; 2282 } 2283 } 2284#endif // TIERED 2285 2286#ifndef COMPILER2 2287 // Don't degrade server performance for footprint 2288 if (FLAG_IS_DEFAULT(UseLargePages) && 2289 MaxHeapSize < LargePageHeapSizeThreshold) { 2290 // No need for large granularity pages w/small heaps. 2291 // Note that large pages are enabled/disabled for both the 2292 // Java heap and the code cache. 2293 FLAG_SET_DEFAULT(UseLargePages, false); 2294 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); 2295 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); 2296 } 2297#else 2298 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 2299 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 2300 } 2301#endif 2302 2303 if (!check_vm_args_consistency()) { 2304 return JNI_ERR; 2305 } 2306 2307 return JNI_OK; 2308} 2309 2310jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2311 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 2312 scp_assembly_required_p); 2313} 2314 2315jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2316 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 2317 scp_assembly_required_p); 2318} 2319 2320jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 2321 const int N_MAX_OPTIONS = 64; 2322 const int OPTION_BUFFER_SIZE = 1024; 2323 char buffer[OPTION_BUFFER_SIZE]; 2324 2325 // The variable will be ignored if it exceeds the length of the buffer. 2326 // Don't check this variable if user has special privileges 2327 // (e.g. unix su command). 2328 if (os::getenv(name, buffer, sizeof(buffer)) && 2329 !os::have_special_privileges()) { 2330 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 2331 jio_fprintf(defaultStream::error_stream(), 2332 "Picked up %s: %s\n", name, buffer); 2333 char* rd = buffer; // pointer to the input string (rd) 2334 int i; 2335 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 2336 while (isspace(*rd)) rd++; // skip whitespace 2337 if (*rd == 0) break; // we re done when the input string is read completely 2338 2339 // The output, option string, overwrites the input string. 2340 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 2341 // input string (rd). 2342 char* wrt = rd; 2343 2344 options[i++].optionString = wrt; // Fill in option 2345 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 2346 if (*rd == '\'' || *rd == '"') { // handle a quoted string 2347 int quote = *rd; // matching quote to look for 2348 rd++; // don't copy open quote 2349 while (*rd != quote) { // include everything (even spaces) up until quote 2350 if (*rd == 0) { // string termination means unmatched string 2351 jio_fprintf(defaultStream::error_stream(), 2352 "Unmatched quote in %s\n", name); 2353 return JNI_ERR; 2354 } 2355 *wrt++ = *rd++; // copy to option string 2356 } 2357 rd++; // don't copy close quote 2358 } else { 2359 *wrt++ = *rd++; // copy to option string 2360 } 2361 } 2362 // Need to check if we're done before writing a NULL, 2363 // because the write could be to the byte that rd is pointing to. 2364 if (*rd++ == 0) { 2365 *wrt = 0; 2366 break; 2367 } 2368 *wrt = 0; // Zero terminate option 2369 } 2370 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 2371 JavaVMInitArgs vm_args; 2372 vm_args.version = JNI_VERSION_1_2; 2373 vm_args.options = options; 2374 vm_args.nOptions = i; 2375 vm_args.ignoreUnrecognized = false; 2376 2377 if (PrintVMOptions) { 2378 const char* tail; 2379 for (int i = 0; i < vm_args.nOptions; i++) { 2380 const JavaVMOption *option = vm_args.options + i; 2381 if (match_option(option, "-XX:", &tail)) { 2382 logOption(tail); 2383 } 2384 } 2385 } 2386 2387 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); 2388 } 2389 return JNI_OK; 2390} 2391 2392// Parse entry point called from JNI_CreateJavaVM 2393 2394jint Arguments::parse(const JavaVMInitArgs* args) { 2395 2396 // Sharing support 2397 // Construct the path to the archive 2398 char jvm_path[JVM_MAXPATHLEN]; 2399 os::jvm_path(jvm_path, sizeof(jvm_path)); 2400#ifdef TIERED 2401 if (strstr(jvm_path, "client") != NULL) { 2402 force_client_mode = true; 2403 } 2404#endif // TIERED 2405 char *end = strrchr(jvm_path, *os::file_separator()); 2406 if (end != NULL) *end = '\0'; 2407 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + 2408 strlen(os::file_separator()) + 20); 2409 if (shared_archive_path == NULL) return JNI_ENOMEM; 2410 strcpy(shared_archive_path, jvm_path); 2411 strcat(shared_archive_path, os::file_separator()); 2412 strcat(shared_archive_path, "classes"); 2413 DEBUG_ONLY(strcat(shared_archive_path, "_g");) 2414 strcat(shared_archive_path, ".jsa"); 2415 SharedArchivePath = shared_archive_path; 2416 2417 // Remaining part of option string 2418 const char* tail; 2419 2420 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 2421 bool settings_file_specified = false; 2422 int index; 2423 for (index = 0; index < args->nOptions; index++) { 2424 const JavaVMOption *option = args->options + index; 2425 if (match_option(option, "-XX:Flags=", &tail)) { 2426 if (!process_settings_file(tail, true, args->ignoreUnrecognized)) { 2427 return JNI_EINVAL; 2428 } 2429 settings_file_specified = true; 2430 } 2431 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 2432 PrintVMOptions = true; 2433 } 2434 } 2435 2436 // Parse default .hotspotrc settings file 2437 if (!settings_file_specified) { 2438 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 2439 return JNI_EINVAL; 2440 } 2441 } 2442 2443 if (PrintVMOptions) { 2444 for (index = 0; index < args->nOptions; index++) { 2445 const JavaVMOption *option = args->options + index; 2446 if (match_option(option, "-XX:", &tail)) { 2447 logOption(tail); 2448 } 2449 } 2450 } 2451 2452 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 2453 jint result = parse_vm_init_args(args); 2454 if (result != JNI_OK) { 2455 return result; 2456 } 2457 2458#ifndef PRODUCT 2459 if (TraceBytecodesAt != 0) { 2460 TraceBytecodes = true; 2461 } 2462 if (CountCompiledCalls) { 2463 if (UseCounterDecay) { 2464 warning("UseCounterDecay disabled because CountCalls is set"); 2465 UseCounterDecay = false; 2466 } 2467 } 2468#endif // PRODUCT 2469 2470 if (PrintGCDetails) { 2471 // Turn on -verbose:gc options as well 2472 PrintGC = true; 2473 if (FLAG_IS_DEFAULT(TraceClassUnloading)) { 2474 TraceClassUnloading = true; 2475 } 2476 } 2477 2478#ifdef SERIALGC 2479 set_serial_gc_flags(); 2480#endif // SERIALGC 2481#ifdef KERNEL 2482 no_shared_spaces(); 2483#endif // KERNEL 2484 2485 // Set flags based on ergonomics. 2486 set_ergonomics_flags(); 2487 2488 // Check the GC selections again. 2489 if (!check_gc_consistency()) { 2490 return JNI_EINVAL; 2491 } 2492 2493 if (UseParallelGC || UseParallelOldGC) { 2494 // Set some flags for ParallelGC if needed. 2495 set_parallel_gc_flags(); 2496 } else if (UseConcMarkSweepGC) { 2497 // Set some flags for CMS 2498 set_cms_and_parnew_gc_flags(); 2499 } else if (UseParNewGC) { 2500 // Set some flags for ParNew 2501 set_parnew_gc_flags(); 2502 } 2503 2504#ifdef SERIALGC 2505 assert(verify_serial_gc_flags(), "SerialGC unset"); 2506#endif // SERIALGC 2507 2508 // Set bytecode rewriting flags 2509 set_bytecode_flags(); 2510 2511 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. 2512 set_aggressive_opts_flags(); 2513 2514#ifdef CC_INTERP 2515 // Biased locking is not implemented with c++ interpreter 2516 FLAG_SET_DEFAULT(UseBiasedLocking, false); 2517#endif /* CC_INTERP */ 2518 2519 if (PrintCommandLineFlags) { 2520 CommandLineFlags::printSetFlags(); 2521 } 2522 2523#ifdef ASSERT 2524 if (PrintFlagsFinal) { 2525 CommandLineFlags::printFlags(); 2526 } 2527#endif 2528 2529 return JNI_OK; 2530} 2531 2532int Arguments::PropertyList_count(SystemProperty* pl) { 2533 int count = 0; 2534 while(pl != NULL) { 2535 count++; 2536 pl = pl->next(); 2537 } 2538 return count; 2539} 2540 2541const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 2542 assert(key != NULL, "just checking"); 2543 SystemProperty* prop; 2544 for (prop = pl; prop != NULL; prop = prop->next()) { 2545 if (strcmp(key, prop->key()) == 0) return prop->value(); 2546 } 2547 return NULL; 2548} 2549 2550const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 2551 int count = 0; 2552 const char* ret_val = NULL; 2553 2554 while(pl != NULL) { 2555 if(count >= index) { 2556 ret_val = pl->key(); 2557 break; 2558 } 2559 count++; 2560 pl = pl->next(); 2561 } 2562 2563 return ret_val; 2564} 2565 2566char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 2567 int count = 0; 2568 char* ret_val = NULL; 2569 2570 while(pl != NULL) { 2571 if(count >= index) { 2572 ret_val = pl->value(); 2573 break; 2574 } 2575 count++; 2576 pl = pl->next(); 2577 } 2578 2579 return ret_val; 2580} 2581 2582void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 2583 SystemProperty* p = *plist; 2584 if (p == NULL) { 2585 *plist = new_p; 2586 } else { 2587 while (p->next() != NULL) { 2588 p = p->next(); 2589 } 2590 p->set_next(new_p); 2591 } 2592} 2593 2594void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 2595 if (plist == NULL) 2596 return; 2597 2598 SystemProperty* new_p = new SystemProperty(k, v, true); 2599 PropertyList_add(plist, new_p); 2600} 2601 2602// This add maintains unique property key in the list. 2603void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 2604 if (plist == NULL) 2605 return; 2606 2607 // If property key exist then update with new value. 2608 SystemProperty* prop; 2609 for (prop = *plist; prop != NULL; prop = prop->next()) { 2610 if (strcmp(k, prop->key()) == 0) { 2611 prop->set_value(v); 2612 return; 2613 } 2614 } 2615 2616 PropertyList_add(plist, k, v); 2617} 2618 2619#ifdef KERNEL 2620char *Arguments::get_kernel_properties() { 2621 // Find properties starting with kernel and append them to string 2622 // We need to find out how long they are first because the URL's that they 2623 // might point to could get long. 2624 int length = 0; 2625 SystemProperty* prop; 2626 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2627 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2628 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" 2629 } 2630 } 2631 // Add one for null terminator. 2632 char *props = AllocateHeap(length + 1, "get_kernel_properties"); 2633 if (length != 0) { 2634 int pos = 0; 2635 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2636 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2637 jio_snprintf(&props[pos], length-pos, 2638 "-D%s=%s ", prop->key(), prop->value()); 2639 pos = strlen(props); 2640 } 2641 } 2642 } 2643 // null terminate props in case of null 2644 props[length] = '\0'; 2645 return props; 2646} 2647#endif // KERNEL 2648 2649// Copies src into buf, replacing "%%" with "%" and "%p" with pid 2650// Returns true if all of the source pointed by src has been copied over to 2651// the destination buffer pointed by buf. Otherwise, returns false. 2652// Notes: 2653// 1. If the length (buflen) of the destination buffer excluding the 2654// NULL terminator character is not long enough for holding the expanded 2655// pid characters, it also returns false instead of returning the partially 2656// expanded one. 2657// 2. The passed in "buflen" should be large enough to hold the null terminator. 2658bool Arguments::copy_expand_pid(const char* src, size_t srclen, 2659 char* buf, size_t buflen) { 2660 const char* p = src; 2661 char* b = buf; 2662 const char* src_end = &src[srclen]; 2663 char* buf_end = &buf[buflen - 1]; 2664 2665 while (p < src_end && b < buf_end) { 2666 if (*p == '%') { 2667 switch (*(++p)) { 2668 case '%': // "%%" ==> "%" 2669 *b++ = *p++; 2670 break; 2671 case 'p': { // "%p" ==> current process id 2672 // buf_end points to the character before the last character so 2673 // that we could write '\0' to the end of the buffer. 2674 size_t buf_sz = buf_end - b + 1; 2675 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 2676 2677 // if jio_snprintf fails or the buffer is not long enough to hold 2678 // the expanded pid, returns false. 2679 if (ret < 0 || ret >= (int)buf_sz) { 2680 return false; 2681 } else { 2682 b += ret; 2683 assert(*b == '\0', "fail in copy_expand_pid"); 2684 if (p == src_end && b == buf_end + 1) { 2685 // reach the end of the buffer. 2686 return true; 2687 } 2688 } 2689 p++; 2690 break; 2691 } 2692 default : 2693 *b++ = '%'; 2694 } 2695 } else { 2696 *b++ = *p++; 2697 } 2698 } 2699 *b = '\0'; 2700 return (p == src_end); // return false if not all of the source was copied 2701} 2702