arguments.cpp revision 342:37f87013dfd8
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 && !UseG1GC, 926 "control point invariant"); 927 assert(UseParNewGC, "Error"); 928 929 // Turn off AdaptiveSizePolicy by default for parnew until it is 930 // complete. 931 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { 932 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 933 } 934 935 if (ParallelGCThreads == 0) { 936 FLAG_SET_DEFAULT(ParallelGCThreads, 937 Abstract_VM_Version::parallel_worker_threads()); 938 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 939 FLAG_SET_DEFAULT(UseParNewGC, false); 940 } 941 } 942 if (!UseParNewGC) { 943 FLAG_SET_DEFAULT(ParallelGCThreads, 0); 944 } else { 945 no_shared_spaces(); 946 947 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 correspondinly, 948 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 949 // we set them to 1024 and 1024. 950 // See CR 6362902. 951 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 952 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 953 } 954 if (FLAG_IS_DEFAULT(OldPLABSize)) { 955 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 956 } 957 958 // AlwaysTenure flag should make ParNew to promote all at first collection. 959 // See CR 6362902. 960 if (AlwaysTenure) { 961 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); 962 } 963 } 964} 965 966// Adjust some sizes to suit CMS and/or ParNew needs; these work well on 967// sparc/solaris for certain applications, but would gain from 968// further optimization and tuning efforts, and would almost 969// certainly gain from analysis of platform and environment. 970void Arguments::set_cms_and_parnew_gc_flags() { 971 assert(!UseSerialGC && !UseParallelGC, "Error"); 972 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 973 974 // If we are using CMS, we prefer to UseParNewGC, 975 // unless explicitly forbidden. 976 if (FLAG_IS_DEFAULT(UseParNewGC)) { 977 FLAG_SET_ERGO(bool, UseParNewGC, true); 978 } 979 980 // Turn off AdaptiveSizePolicy by default for cms until it is 981 // complete. 982 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { 983 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 984 } 985 986 // In either case, adjust ParallelGCThreads and/or UseParNewGC 987 // as needed. 988 if (UseParNewGC) { 989 set_parnew_gc_flags(); 990 } 991 992 // Now make adjustments for CMS 993 size_t young_gen_per_worker; 994 intx new_ratio; 995 size_t min_new_default; 996 intx tenuring_default; 997 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 998 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { 999 FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); 1000 } 1001 young_gen_per_worker = 4*M; 1002 new_ratio = (intx)15; 1003 min_new_default = 4*M; 1004 tenuring_default = (intx)0; 1005 } else { // new defaults: "new" as of 6.0 1006 young_gen_per_worker = CMSYoungGenPerWorker; 1007 new_ratio = (intx)7; 1008 min_new_default = 16*M; 1009 tenuring_default = (intx)4; 1010 } 1011 1012 // Preferred young gen size for "short" pauses 1013 const uintx parallel_gc_threads = 1014 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); 1015 const size_t preferred_max_new_size_unaligned = 1016 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); 1017 const size_t preferred_max_new_size = 1018 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1019 1020 // Unless explicitly requested otherwise, size young gen 1021 // for "short" pauses ~ 4M*ParallelGCThreads 1022 if (FLAG_IS_DEFAULT(MaxNewSize)) { // MaxNewSize not set at command-line 1023 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1024 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1025 } else { 1026 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); 1027 } 1028 if(PrintGCDetails && Verbose) { 1029 // Too early to use gclog_or_tty 1030 tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1031 } 1032 } 1033 // Unless explicitly requested otherwise, prefer a large 1034 // Old to Young gen size so as to shift the collection load 1035 // to the old generation concurrent collector 1036 if (FLAG_IS_DEFAULT(NewRatio)) { 1037 FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); 1038 1039 size_t min_new = align_size_up(ScaleForWordSize(min_new_default), os::vm_page_size()); 1040 size_t prev_initial_size = initial_heap_size(); 1041 if (prev_initial_size != 0 && prev_initial_size < min_new+OldSize) { 1042 set_initial_heap_size(min_new+OldSize); 1043 // Currently minimum size and the initial heap sizes are the same. 1044 set_min_heap_size(initial_heap_size()); 1045 if (PrintGCDetails && Verbose) { 1046 warning("Initial heap size increased to " SIZE_FORMAT " M from " 1047 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", 1048 initial_heap_size()/M, prev_initial_size/M); 1049 } 1050 } 1051 // MaxHeapSize is aligned down in collectorPolicy 1052 size_t max_heap = align_size_down(MaxHeapSize, 1053 CardTableRS::ct_max_alignment_constraint()); 1054 1055 if(PrintGCDetails && Verbose) { 1056 // Too early to use gclog_or_tty 1057 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT 1058 " initial_heap_size: " SIZE_FORMAT 1059 " max_heap: " SIZE_FORMAT, 1060 min_heap_size(), initial_heap_size(), max_heap); 1061 } 1062 if (max_heap > min_new) { 1063 // Unless explicitly requested otherwise, make young gen 1064 // at least min_new, and at most preferred_max_new_size. 1065 if (FLAG_IS_DEFAULT(NewSize)) { 1066 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); 1067 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); 1068 if(PrintGCDetails && Verbose) { 1069 // Too early to use gclog_or_tty 1070 tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); 1071 } 1072 } 1073 // Unless explicitly requested otherwise, size old gen 1074 // so that it's at least 3X of NewSize to begin with; 1075 // later NewRatio will decide how it grows; see above. 1076 if (FLAG_IS_DEFAULT(OldSize)) { 1077 if (max_heap > NewSize) { 1078 FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); 1079 if(PrintGCDetails && Verbose) { 1080 // Too early to use gclog_or_tty 1081 tty->print_cr("Ergo set OldSize: " SIZE_FORMAT, OldSize); 1082 } 1083 } 1084 } 1085 } 1086 } 1087 // Unless explicitly requested otherwise, definitely 1088 // promote all objects surviving "tenuring_default" scavenges. 1089 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1090 FLAG_IS_DEFAULT(SurvivorRatio)) { 1091 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); 1092 } 1093 // If we decided above (or user explicitly requested) 1094 // `promote all' (via MaxTenuringThreshold := 0), 1095 // prefer minuscule survivor spaces so as not to waste 1096 // space for (non-existent) survivors 1097 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1098 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); 1099 } 1100 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, 1101 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. 1102 // This is done in order to make ParNew+CMS configuration to work 1103 // with YoungPLABSize and OldPLABSize options. 1104 // See CR 6362902. 1105 if (!FLAG_IS_DEFAULT(OldPLABSize)) { 1106 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1107 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim 1108 // is. In this situtation let CMSParPromoteBlocksToClaim follow 1109 // the value (either from the command line or ergonomics) of 1110 // OldPLABSize. Following OldPLABSize is an ergonomics decision. 1111 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); 1112 } 1113 else { 1114 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. 1115 // CMSParPromoteBlocksToClaim is a collector-specific flag, so 1116 // we'll let it to take precedence. 1117 jio_fprintf(defaultStream::error_stream(), 1118 "Both OldPLABSize and CMSParPromoteBlocksToClaim options are specified " 1119 "for the CMS collector. CMSParPromoteBlocksToClaim will take precedence.\n"); 1120 } 1121 } 1122} 1123 1124inline uintx max_heap_for_compressed_oops() { 1125 LP64_ONLY(return oopDesc::OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); 1126 NOT_LP64(return DefaultMaxRAM); 1127} 1128 1129bool Arguments::should_auto_select_low_pause_collector() { 1130 if (UseAutoGCSelectPolicy && 1131 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1132 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1133 if (PrintGCDetails) { 1134 // Cannot use gclog_or_tty yet. 1135 tty->print_cr("Automatic selection of the low pause collector" 1136 " based on pause goal of %d (ms)", MaxGCPauseMillis); 1137 } 1138 return true; 1139 } 1140 return false; 1141} 1142 1143void Arguments::set_ergonomics_flags() { 1144 // Parallel GC is not compatible with sharing. If one specifies 1145 // that they want sharing explicitly, do not set ergonmics flags. 1146 if (DumpSharedSpaces || ForceSharedSpaces) { 1147 return; 1148 } 1149 1150 if (os::is_server_class_machine() && !force_client_mode ) { 1151 // If no other collector is requested explicitly, 1152 // let the VM select the collector based on 1153 // machine class and automatic selection policy. 1154 if (!UseSerialGC && 1155 !UseConcMarkSweepGC && 1156 !UseG1GC && 1157 !UseParNewGC && 1158 !DumpSharedSpaces && 1159 FLAG_IS_DEFAULT(UseParallelGC)) { 1160 if (should_auto_select_low_pause_collector()) { 1161 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1162 } else { 1163 FLAG_SET_ERGO(bool, UseParallelGC, true); 1164 } 1165 no_shared_spaces(); 1166 } 1167 } 1168 1169#ifdef _LP64 1170 // Compressed Headers do not work with CMS, which uses a bit in the klass 1171 // field offset to determine free list chunk markers. 1172 // Check that UseCompressedOops can be set with the max heap size allocated 1173 // by ergonomics. 1174 if (!UseG1GC && !UseConcMarkSweepGC && MaxHeapSize <= max_heap_for_compressed_oops()) { 1175 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1176 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1177 } 1178 } else { 1179 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1180 // If specified, give a warning 1181 if (UseConcMarkSweepGC){ 1182 warning("Compressed Oops does not work with CMS"); 1183 } else if (UseG1GC) { 1184 warning("Compressed Oops does not work with UseG1GC"); 1185 } else { 1186 warning( 1187 "Max heap size too large for Compressed Oops"); 1188 } 1189 FLAG_SET_DEFAULT(UseCompressedOops, false); 1190 } 1191 } 1192 // Also checks that certain machines are slower with compressed oops 1193 // in vm_version initialization code. 1194#endif // _LP64 1195} 1196 1197void Arguments::set_parallel_gc_flags() { 1198 assert(UseParallelGC || UseParallelOldGC, "Error"); 1199 // If parallel old was requested, automatically enable parallel scavenge. 1200 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { 1201 FLAG_SET_DEFAULT(UseParallelGC, true); 1202 } 1203 1204 // If no heap maximum was requested explicitly, use some reasonable fraction 1205 // of the physical memory, up to a maximum of 1GB. 1206 if (UseParallelGC) { 1207 FLAG_SET_ERGO(uintx, ParallelGCThreads, 1208 Abstract_VM_Version::parallel_worker_threads()); 1209 1210 // PS is a server collector, setup the heap sizes accordingly. 1211 set_server_heap_size(); 1212 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1213 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1214 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1215 // See CR 6362902 for details. 1216 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1217 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1218 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1219 } 1220 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1221 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1222 } 1223 } 1224 1225 if (UseParallelOldGC) { 1226 // Par compact uses lower default values since they are treated as 1227 // minimums. These are different defaults because of the different 1228 // interpretation and are not ergonomically set. 1229 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1230 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1231 } 1232 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { 1233 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); 1234 } 1235 } 1236 } 1237} 1238 1239void Arguments::set_g1_gc_flags() { 1240 assert(UseG1GC, "Error"); 1241 // G1 is a server collector, setup the heap sizes accordingly. 1242 set_server_heap_size(); 1243#ifdef COMPILER1 1244 FastTLABRefill = false; 1245#endif 1246 FLAG_SET_DEFAULT(ParallelGCThreads, 1247 Abstract_VM_Version::parallel_worker_threads()); 1248 if (ParallelGCThreads == 0) { 1249 FLAG_SET_DEFAULT(ParallelGCThreads, 1250 Abstract_VM_Version::parallel_worker_threads 1251()); 1252 } 1253 no_shared_spaces(); 1254} 1255 1256void Arguments::set_server_heap_size() { 1257 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1258 const uint64_t reasonable_fraction = 1259 os::physical_memory() / DefaultMaxRAMFraction; 1260 const uint64_t maximum_size = (uint64_t) 1261 (FLAG_IS_DEFAULT(DefaultMaxRAM) && UseCompressedOops ? 1262 MIN2(max_heap_for_compressed_oops(), DefaultMaxRAM) : 1263 DefaultMaxRAM); 1264 size_t reasonable_max = 1265 (size_t) os::allocatable_physical_memory(reasonable_fraction); 1266 if (reasonable_max > maximum_size) { 1267 reasonable_max = maximum_size; 1268 } 1269 if (PrintGCDetails && Verbose) { 1270 // Cannot use gclog_or_tty yet. 1271 tty->print_cr(" Max heap size for server class platform " 1272 SIZE_FORMAT, reasonable_max); 1273 } 1274 // If the initial_heap_size has not been set with -Xms, 1275 // then set it as fraction of size of physical memory 1276 // respecting the maximum and minimum sizes of the heap. 1277 if (initial_heap_size() == 0) { 1278 const uint64_t reasonable_initial_fraction = 1279 os::physical_memory() / DefaultInitialRAMFraction; 1280 const size_t reasonable_initial = 1281 (size_t) os::allocatable_physical_memory(reasonable_initial_fraction); 1282 const size_t minimum_size = NewSize + OldSize; 1283 set_initial_heap_size(MAX2(MIN2(reasonable_initial, reasonable_max), 1284 minimum_size)); 1285 // Currently the minimum size and the initial heap sizes are the same. 1286 set_min_heap_size(initial_heap_size()); 1287 if (PrintGCDetails && Verbose) { 1288 // Cannot use gclog_or_tty yet. 1289 tty->print_cr(" Initial heap size for server class platform " 1290 SIZE_FORMAT, initial_heap_size()); 1291 } 1292 } else { 1293 // A minimum size was specified on the command line. Be sure 1294 // that the maximum size is consistent. 1295 if (initial_heap_size() > reasonable_max) { 1296 reasonable_max = initial_heap_size(); 1297 } 1298 } 1299 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx) reasonable_max); 1300 } 1301} 1302 1303// This must be called after ergonomics because we want bytecode rewriting 1304// if the server compiler is used, or if UseSharedSpaces is disabled. 1305void Arguments::set_bytecode_flags() { 1306 // Better not attempt to store into a read-only space. 1307 if (UseSharedSpaces) { 1308 FLAG_SET_DEFAULT(RewriteBytecodes, false); 1309 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1310 } 1311 1312 if (!RewriteBytecodes) { 1313 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1314 } 1315} 1316 1317// Aggressive optimization flags -XX:+AggressiveOpts 1318void Arguments::set_aggressive_opts_flags() { 1319#ifdef COMPILER2 1320 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1321 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1322 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1323 } 1324 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1325 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1326 } 1327 1328 // Feed the cache size setting into the JDK 1329 char buffer[1024]; 1330 sprintf(buffer, "java.lang.Integer.IntegerCache.high=%d", AutoBoxCacheMax); 1331 add_property(buffer); 1332 } 1333 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1334 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1335 } 1336#endif 1337 1338 if (AggressiveOpts) { 1339// Sample flag setting code 1340// if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1341// FLAG_SET_DEFAULT(EliminateZeroing, true); 1342// } 1343 } 1344} 1345 1346//=========================================================================================================== 1347// Parsing of java.compiler property 1348 1349void Arguments::process_java_compiler_argument(char* arg) { 1350 // For backwards compatibility, Djava.compiler=NONE or "" 1351 // causes us to switch to -Xint mode UNLESS -Xdebug 1352 // is also specified. 1353 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1354 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1355 } 1356} 1357 1358void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 1359 _sun_java_launcher = strdup(launcher); 1360} 1361 1362bool Arguments::created_by_java_launcher() { 1363 assert(_sun_java_launcher != NULL, "property must have value"); 1364 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 1365} 1366 1367//=========================================================================================================== 1368// Parsing of main arguments 1369 1370bool Arguments::verify_percentage(uintx value, const char* name) { 1371 if (value <= 100) { 1372 return true; 1373 } 1374 jio_fprintf(defaultStream::error_stream(), 1375 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 1376 name, value); 1377 return false; 1378} 1379 1380static void set_serial_gc_flags() { 1381 FLAG_SET_DEFAULT(UseSerialGC, true); 1382 FLAG_SET_DEFAULT(UseParNewGC, false); 1383 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); 1384 FLAG_SET_DEFAULT(UseParallelGC, false); 1385 FLAG_SET_DEFAULT(UseParallelOldGC, false); 1386 FLAG_SET_DEFAULT(UseG1GC, false); 1387} 1388 1389static bool verify_serial_gc_flags() { 1390 return (UseSerialGC && 1391 !(UseParNewGC || UseConcMarkSweepGC || UseG1GC || 1392 UseParallelGC || UseParallelOldGC)); 1393} 1394 1395// Check consistency of GC selection 1396bool Arguments::check_gc_consistency() { 1397 bool status = true; 1398 // Ensure that the user has not selected conflicting sets 1399 // of collectors. [Note: this check is merely a user convenience; 1400 // collectors over-ride each other so that only a non-conflicting 1401 // set is selected; however what the user gets is not what they 1402 // may have expected from the combination they asked for. It's 1403 // better to reduce user confusion by not allowing them to 1404 // select conflicting combinations. 1405 uint i = 0; 1406 if (UseSerialGC) i++; 1407 if (UseConcMarkSweepGC || UseParNewGC) i++; 1408 if (UseParallelGC || UseParallelOldGC) i++; 1409 if (i > 1) { 1410 jio_fprintf(defaultStream::error_stream(), 1411 "Conflicting collector combinations in option list; " 1412 "please refer to the release notes for the combinations " 1413 "allowed\n"); 1414 status = false; 1415 } 1416 1417 return status; 1418} 1419 1420// Check the consistency of vm_init_args 1421bool Arguments::check_vm_args_consistency() { 1422 // Method for adding checks for flag consistency. 1423 // The intent is to warn the user of all possible conflicts, 1424 // before returning an error. 1425 // Note: Needs platform-dependent factoring. 1426 bool status = true; 1427 1428#if ( (defined(COMPILER2) && defined(SPARC))) 1429 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init 1430 // on sparc doesn't require generation of a stub as is the case on, e.g., 1431 // x86. Normally, VM_Version_init must be called from init_globals in 1432 // init.cpp, which is called by the initial java thread *after* arguments 1433 // have been parsed. VM_Version_init gets called twice on sparc. 1434 extern void VM_Version_init(); 1435 VM_Version_init(); 1436 if (!VM_Version::has_v9()) { 1437 jio_fprintf(defaultStream::error_stream(), 1438 "V8 Machine detected, Server requires V9\n"); 1439 status = false; 1440 } 1441#endif /* COMPILER2 && SPARC */ 1442 1443 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product 1444 // builds so the cost of stack banging can be measured. 1445#if (defined(PRODUCT) && defined(SOLARIS)) 1446 if (!UseBoundThreads && !UseStackBanging) { 1447 jio_fprintf(defaultStream::error_stream(), 1448 "-UseStackBanging conflicts with -UseBoundThreads\n"); 1449 1450 status = false; 1451 } 1452#endif 1453 1454 if (TLABRefillWasteFraction == 0) { 1455 jio_fprintf(defaultStream::error_stream(), 1456 "TLABRefillWasteFraction should be a denominator, " 1457 "not " SIZE_FORMAT "\n", 1458 TLABRefillWasteFraction); 1459 status = false; 1460 } 1461 1462 status = status && verify_percentage(MaxLiveObjectEvacuationRatio, 1463 "MaxLiveObjectEvacuationRatio"); 1464 status = status && verify_percentage(AdaptiveSizePolicyWeight, 1465 "AdaptiveSizePolicyWeight"); 1466 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); 1467 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 1468 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); 1469 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); 1470 1471 if (MinHeapFreeRatio > MaxHeapFreeRatio) { 1472 jio_fprintf(defaultStream::error_stream(), 1473 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 1474 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", 1475 MinHeapFreeRatio, MaxHeapFreeRatio); 1476 status = false; 1477 } 1478 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1479 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); 1480 1481 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 1482 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 1483 } 1484 1485 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1486 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); 1487 if (GCTimeLimit == 100) { 1488 // Turn off gc-overhead-limit-exceeded checks 1489 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 1490 } 1491 1492 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1493 1494 // Check user specified sharing option conflict with Parallel GC 1495 bool cannot_share = (UseConcMarkSweepGC || UseG1GC || UseParNewGC || 1496 UseParallelGC || UseParallelOldGC || 1497 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); 1498 1499 if (cannot_share) { 1500 // Either force sharing on by forcing the other options off, or 1501 // force sharing off. 1502 if (DumpSharedSpaces || ForceSharedSpaces) { 1503 set_serial_gc_flags(); 1504 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); 1505 } else { 1506 no_shared_spaces(); 1507 } 1508 } 1509 1510 status = status && check_gc_consistency(); 1511 1512 if (_has_alloc_profile) { 1513 if (UseParallelGC || UseParallelOldGC) { 1514 jio_fprintf(defaultStream::error_stream(), 1515 "error: invalid argument combination.\n" 1516 "Allocation profiling (-Xaprof) cannot be used together with " 1517 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); 1518 status = false; 1519 } 1520 if (UseConcMarkSweepGC) { 1521 jio_fprintf(defaultStream::error_stream(), 1522 "error: invalid argument combination.\n" 1523 "Allocation profiling (-Xaprof) cannot be used together with " 1524 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); 1525 status = false; 1526 } 1527 } 1528 1529 if (CMSIncrementalMode) { 1530 if (!UseConcMarkSweepGC) { 1531 jio_fprintf(defaultStream::error_stream(), 1532 "error: invalid argument combination.\n" 1533 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 1534 "selected in order\nto use CMSIncrementalMode.\n"); 1535 status = false; 1536 } else { 1537 status = status && verify_percentage(CMSIncrementalDutyCycle, 1538 "CMSIncrementalDutyCycle"); 1539 status = status && verify_percentage(CMSIncrementalDutyCycleMin, 1540 "CMSIncrementalDutyCycleMin"); 1541 status = status && verify_percentage(CMSIncrementalSafetyFactor, 1542 "CMSIncrementalSafetyFactor"); 1543 status = status && verify_percentage(CMSIncrementalOffset, 1544 "CMSIncrementalOffset"); 1545 status = status && verify_percentage(CMSExpAvgFactor, 1546 "CMSExpAvgFactor"); 1547 // If it was not set on the command line, set 1548 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 1549 if (CMSInitiatingOccupancyFraction < 0) { 1550 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 1551 } 1552 } 1553 } 1554 1555 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 1556 // insists that we hold the requisite locks so that the iteration is 1557 // MT-safe. For the verification at start-up and shut-down, we don't 1558 // yet have a good way of acquiring and releasing these locks, 1559 // which are not visible at the CollectedHeap level. We want to 1560 // be able to acquire these locks and then do the iteration rather 1561 // than just disable the lock verification. This will be fixed under 1562 // bug 4788986. 1563 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 1564 if (VerifyGCStartAt == 0) { 1565 warning("Heap verification at start-up disabled " 1566 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1567 VerifyGCStartAt = 1; // Disable verification at start-up 1568 } 1569 if (VerifyBeforeExit) { 1570 warning("Heap verification at shutdown disabled " 1571 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1572 VerifyBeforeExit = false; // Disable verification at shutdown 1573 } 1574 } 1575 1576 // Note: only executed in non-PRODUCT mode 1577 if (!UseAsyncConcMarkSweepGC && 1578 (ExplicitGCInvokesConcurrent || 1579 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 1580 jio_fprintf(defaultStream::error_stream(), 1581 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" 1582 " with -UseAsyncConcMarkSweepGC"); 1583 status = false; 1584 } 1585 1586 return status; 1587} 1588 1589bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 1590 const char* option_type) { 1591 if (ignore) return false; 1592 1593 const char* spacer = " "; 1594 if (option_type == NULL) { 1595 option_type = ++spacer; // Set both to the empty string. 1596 } 1597 1598 if (os::obsolete_option(option)) { 1599 jio_fprintf(defaultStream::error_stream(), 1600 "Obsolete %s%soption: %s\n", option_type, spacer, 1601 option->optionString); 1602 return false; 1603 } else { 1604 jio_fprintf(defaultStream::error_stream(), 1605 "Unrecognized %s%soption: %s\n", option_type, spacer, 1606 option->optionString); 1607 return true; 1608 } 1609} 1610 1611static const char* user_assertion_options[] = { 1612 "-da", "-ea", "-disableassertions", "-enableassertions", 0 1613}; 1614 1615static const char* system_assertion_options[] = { 1616 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 1617}; 1618 1619// Return true if any of the strings in null-terminated array 'names' matches. 1620// If tail_allowed is true, then the tail must begin with a colon; otherwise, 1621// the option must match exactly. 1622static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 1623 bool tail_allowed) { 1624 for (/* empty */; *names != NULL; ++names) { 1625 if (match_option(option, *names, tail)) { 1626 if (**tail == '\0' || tail_allowed && **tail == ':') { 1627 return true; 1628 } 1629 } 1630 } 1631 return false; 1632} 1633 1634Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 1635 jlong* long_arg, 1636 jlong min_size) { 1637 if (!atomll(s, long_arg)) return arg_unreadable; 1638 return check_memory_size(*long_arg, min_size); 1639} 1640 1641// Parse JavaVMInitArgs structure 1642 1643jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 1644 // For components of the system classpath. 1645 SysClassPath scp(Arguments::get_sysclasspath()); 1646 bool scp_assembly_required = false; 1647 1648 // Save default settings for some mode flags 1649 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 1650 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 1651 Arguments::_ClipInlining = ClipInlining; 1652 Arguments::_BackgroundCompilation = BackgroundCompilation; 1653 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 1654 1655 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 1656 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 1657 if (result != JNI_OK) { 1658 return result; 1659 } 1660 1661 // Parse JavaVMInitArgs structure passed in 1662 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); 1663 if (result != JNI_OK) { 1664 return result; 1665 } 1666 1667 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 1668 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 1669 if (result != JNI_OK) { 1670 return result; 1671 } 1672 1673 // Do final processing now that all arguments have been parsed 1674 result = finalize_vm_init_args(&scp, scp_assembly_required); 1675 if (result != JNI_OK) { 1676 return result; 1677 } 1678 1679 return JNI_OK; 1680} 1681 1682 1683jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 1684 SysClassPath* scp_p, 1685 bool* scp_assembly_required_p, 1686 FlagValueOrigin origin) { 1687 // Remaining part of option string 1688 const char* tail; 1689 1690 // iterate over arguments 1691 for (int index = 0; index < args->nOptions; index++) { 1692 bool is_absolute_path = false; // for -agentpath vs -agentlib 1693 1694 const JavaVMOption* option = args->options + index; 1695 1696 if (!match_option(option, "-Djava.class.path", &tail) && 1697 !match_option(option, "-Dsun.java.command", &tail) && 1698 !match_option(option, "-Dsun.java.launcher", &tail)) { 1699 1700 // add all jvm options to the jvm_args string. This string 1701 // is used later to set the java.vm.args PerfData string constant. 1702 // the -Djava.class.path and the -Dsun.java.command options are 1703 // omitted from jvm_args string as each have their own PerfData 1704 // string constant object. 1705 build_jvm_args(option->optionString); 1706 } 1707 1708 // -verbose:[class/gc/jni] 1709 if (match_option(option, "-verbose", &tail)) { 1710 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 1711 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 1712 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1713 } else if (!strcmp(tail, ":gc")) { 1714 FLAG_SET_CMDLINE(bool, PrintGC, true); 1715 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1716 } else if (!strcmp(tail, ":jni")) { 1717 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 1718 } 1719 // -da / -ea / -disableassertions / -enableassertions 1720 // These accept an optional class/package name separated by a colon, e.g., 1721 // -da:java.lang.Thread. 1722 } else if (match_option(option, user_assertion_options, &tail, true)) { 1723 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1724 if (*tail == '\0') { 1725 JavaAssertions::setUserClassDefault(enable); 1726 } else { 1727 assert(*tail == ':', "bogus match by match_option()"); 1728 JavaAssertions::addOption(tail + 1, enable); 1729 } 1730 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 1731 } else if (match_option(option, system_assertion_options, &tail, false)) { 1732 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1733 JavaAssertions::setSystemClassDefault(enable); 1734 // -bootclasspath: 1735 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 1736 scp_p->reset_path(tail); 1737 *scp_assembly_required_p = true; 1738 // -bootclasspath/a: 1739 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 1740 scp_p->add_suffix(tail); 1741 *scp_assembly_required_p = true; 1742 // -bootclasspath/p: 1743 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 1744 scp_p->add_prefix(tail); 1745 *scp_assembly_required_p = true; 1746 // -Xrun 1747 } else if (match_option(option, "-Xrun", &tail)) { 1748 if(tail != NULL) { 1749 const char* pos = strchr(tail, ':'); 1750 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1751 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1752 name[len] = '\0'; 1753 1754 char *options = NULL; 1755 if(pos != NULL) { 1756 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 1757 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); 1758 } 1759#ifdef JVMTI_KERNEL 1760 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1761 warning("profiling and debugging agents are not supported with Kernel VM"); 1762 } else 1763#endif // JVMTI_KERNEL 1764 add_init_library(name, options); 1765 } 1766 // -agentlib and -agentpath 1767 } else if (match_option(option, "-agentlib:", &tail) || 1768 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 1769 if(tail != NULL) { 1770 const char* pos = strchr(tail, '='); 1771 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1772 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1773 name[len] = '\0'; 1774 1775 char *options = NULL; 1776 if(pos != NULL) { 1777 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); 1778 } 1779#ifdef JVMTI_KERNEL 1780 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1781 warning("profiling and debugging agents are not supported with Kernel VM"); 1782 } else 1783#endif // JVMTI_KERNEL 1784 add_init_agent(name, options, is_absolute_path); 1785 1786 } 1787 // -javaagent 1788 } else if (match_option(option, "-javaagent:", &tail)) { 1789 if(tail != NULL) { 1790 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); 1791 add_init_agent("instrument", options, false); 1792 } 1793 // -Xnoclassgc 1794 } else if (match_option(option, "-Xnoclassgc", &tail)) { 1795 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 1796 // -Xincgc: i-CMS 1797 } else if (match_option(option, "-Xincgc", &tail)) { 1798 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1799 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 1800 // -Xnoincgc: no i-CMS 1801 } else if (match_option(option, "-Xnoincgc", &tail)) { 1802 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1803 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 1804 // -Xconcgc 1805 } else if (match_option(option, "-Xconcgc", &tail)) { 1806 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1807 // -Xnoconcgc 1808 } else if (match_option(option, "-Xnoconcgc", &tail)) { 1809 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1810 // -Xbatch 1811 } else if (match_option(option, "-Xbatch", &tail)) { 1812 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1813 // -Xmn for compatibility with other JVM vendors 1814 } else if (match_option(option, "-Xmn", &tail)) { 1815 jlong long_initial_eden_size = 0; 1816 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); 1817 if (errcode != arg_in_range) { 1818 jio_fprintf(defaultStream::error_stream(), 1819 "Invalid initial eden size: %s\n", option->optionString); 1820 describe_range_error(errcode); 1821 return JNI_EINVAL; 1822 } 1823 FLAG_SET_CMDLINE(uintx, MaxNewSize, (size_t) long_initial_eden_size); 1824 FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size); 1825 // -Xms 1826 } else if (match_option(option, "-Xms", &tail)) { 1827 jlong long_initial_heap_size = 0; 1828 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); 1829 if (errcode != arg_in_range) { 1830 jio_fprintf(defaultStream::error_stream(), 1831 "Invalid initial heap size: %s\n", option->optionString); 1832 describe_range_error(errcode); 1833 return JNI_EINVAL; 1834 } 1835 set_initial_heap_size((size_t) long_initial_heap_size); 1836 // Currently the minimum size and the initial heap sizes are the same. 1837 set_min_heap_size(initial_heap_size()); 1838 // -Xmx 1839 } else if (match_option(option, "-Xmx", &tail)) { 1840 jlong long_max_heap_size = 0; 1841 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 1842 if (errcode != arg_in_range) { 1843 jio_fprintf(defaultStream::error_stream(), 1844 "Invalid maximum heap size: %s\n", option->optionString); 1845 describe_range_error(errcode); 1846 return JNI_EINVAL; 1847 } 1848 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (size_t) long_max_heap_size); 1849 // Xmaxf 1850 } else if (match_option(option, "-Xmaxf", &tail)) { 1851 int maxf = (int)(atof(tail) * 100); 1852 if (maxf < 0 || maxf > 100) { 1853 jio_fprintf(defaultStream::error_stream(), 1854 "Bad max heap free percentage size: %s\n", 1855 option->optionString); 1856 return JNI_EINVAL; 1857 } else { 1858 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 1859 } 1860 // Xminf 1861 } else if (match_option(option, "-Xminf", &tail)) { 1862 int minf = (int)(atof(tail) * 100); 1863 if (minf < 0 || minf > 100) { 1864 jio_fprintf(defaultStream::error_stream(), 1865 "Bad min heap free percentage size: %s\n", 1866 option->optionString); 1867 return JNI_EINVAL; 1868 } else { 1869 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 1870 } 1871 // -Xss 1872 } else if (match_option(option, "-Xss", &tail)) { 1873 jlong long_ThreadStackSize = 0; 1874 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 1875 if (errcode != arg_in_range) { 1876 jio_fprintf(defaultStream::error_stream(), 1877 "Invalid thread stack size: %s\n", option->optionString); 1878 describe_range_error(errcode); 1879 return JNI_EINVAL; 1880 } 1881 // Internally track ThreadStackSize in units of 1024 bytes. 1882 FLAG_SET_CMDLINE(intx, ThreadStackSize, 1883 round_to((int)long_ThreadStackSize, K) / K); 1884 // -Xoss 1885 } else if (match_option(option, "-Xoss", &tail)) { 1886 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 1887 // -Xmaxjitcodesize 1888 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { 1889 jlong long_ReservedCodeCacheSize = 0; 1890 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1891 InitialCodeCacheSize); 1892 if (errcode != arg_in_range) { 1893 jio_fprintf(defaultStream::error_stream(), 1894 "Invalid maximum code cache size: %s\n", 1895 option->optionString); 1896 describe_range_error(errcode); 1897 return JNI_EINVAL; 1898 } 1899 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 1900 // -green 1901 } else if (match_option(option, "-green", &tail)) { 1902 jio_fprintf(defaultStream::error_stream(), 1903 "Green threads support not available\n"); 1904 return JNI_EINVAL; 1905 // -native 1906 } else if (match_option(option, "-native", &tail)) { 1907 // HotSpot always uses native threads, ignore silently for compatibility 1908 // -Xsqnopause 1909 } else if (match_option(option, "-Xsqnopause", &tail)) { 1910 // EVM option, ignore silently for compatibility 1911 // -Xrs 1912 } else if (match_option(option, "-Xrs", &tail)) { 1913 // Classic/EVM option, new functionality 1914 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 1915 } else if (match_option(option, "-Xusealtsigs", &tail)) { 1916 // change default internal VM signals used - lower case for back compat 1917 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 1918 // -Xoptimize 1919 } else if (match_option(option, "-Xoptimize", &tail)) { 1920 // EVM option, ignore silently for compatibility 1921 // -Xprof 1922 } else if (match_option(option, "-Xprof", &tail)) { 1923#ifndef FPROF_KERNEL 1924 _has_profile = true; 1925#else // FPROF_KERNEL 1926 // do we have to exit? 1927 warning("Kernel VM does not support flat profiling."); 1928#endif // FPROF_KERNEL 1929 // -Xaprof 1930 } else if (match_option(option, "-Xaprof", &tail)) { 1931 _has_alloc_profile = true; 1932 // -Xconcurrentio 1933 } else if (match_option(option, "-Xconcurrentio", &tail)) { 1934 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 1935 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1936 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 1937 FLAG_SET_CMDLINE(bool, UseTLAB, false); 1938 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 1939 1940 // -Xinternalversion 1941 } else if (match_option(option, "-Xinternalversion", &tail)) { 1942 jio_fprintf(defaultStream::output_stream(), "%s\n", 1943 VM_Version::internal_vm_info_string()); 1944 vm_exit(0); 1945#ifndef PRODUCT 1946 // -Xprintflags 1947 } else if (match_option(option, "-Xprintflags", &tail)) { 1948 CommandLineFlags::printFlags(); 1949 vm_exit(0); 1950#endif 1951 // -D 1952 } else if (match_option(option, "-D", &tail)) { 1953 if (!add_property(tail)) { 1954 return JNI_ENOMEM; 1955 } 1956 // Out of the box management support 1957 if (match_option(option, "-Dcom.sun.management", &tail)) { 1958 FLAG_SET_CMDLINE(bool, ManagementServer, true); 1959 } 1960 // -Xint 1961 } else if (match_option(option, "-Xint", &tail)) { 1962 set_mode_flags(_int); 1963 // -Xmixed 1964 } else if (match_option(option, "-Xmixed", &tail)) { 1965 set_mode_flags(_mixed); 1966 // -Xcomp 1967 } else if (match_option(option, "-Xcomp", &tail)) { 1968 // for testing the compiler; turn off all flags that inhibit compilation 1969 set_mode_flags(_comp); 1970 1971 // -Xshare:dump 1972 } else if (match_option(option, "-Xshare:dump", &tail)) { 1973#ifdef TIERED 1974 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1975 set_mode_flags(_int); // Prevent compilation, which creates objects 1976#elif defined(COMPILER2) 1977 vm_exit_during_initialization( 1978 "Dumping a shared archive is not supported on the Server JVM.", NULL); 1979#elif defined(KERNEL) 1980 vm_exit_during_initialization( 1981 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); 1982#else 1983 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1984 set_mode_flags(_int); // Prevent compilation, which creates objects 1985#endif 1986 // -Xshare:on 1987 } else if (match_option(option, "-Xshare:on", &tail)) { 1988 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1989 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 1990#ifdef TIERED 1991 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); 1992#endif // TIERED 1993 // -Xshare:auto 1994 } else if (match_option(option, "-Xshare:auto", &tail)) { 1995 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1996 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 1997 // -Xshare:off 1998 } else if (match_option(option, "-Xshare:off", &tail)) { 1999 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 2000 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 2001 2002 // -Xverify 2003 } else if (match_option(option, "-Xverify", &tail)) { 2004 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 2005 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 2006 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 2007 } else if (strcmp(tail, ":remote") == 0) { 2008 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 2009 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 2010 } else if (strcmp(tail, ":none") == 0) { 2011 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 2012 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 2013 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 2014 return JNI_EINVAL; 2015 } 2016 // -Xdebug 2017 } else if (match_option(option, "-Xdebug", &tail)) { 2018 // note this flag has been used, then ignore 2019 set_xdebug_mode(true); 2020 // -Xnoagent 2021 } else if (match_option(option, "-Xnoagent", &tail)) { 2022 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 2023 } else if (match_option(option, "-Xboundthreads", &tail)) { 2024 // Bind user level threads to kernel threads (Solaris only) 2025 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 2026 } else if (match_option(option, "-Xloggc:", &tail)) { 2027 // Redirect GC output to the file. -Xloggc:<filename> 2028 // ostream_init_log(), when called will use this filename 2029 // to initialize a fileStream. 2030 _gc_log_filename = strdup(tail); 2031 FLAG_SET_CMDLINE(bool, PrintGC, true); 2032 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 2033 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 2034 2035 // JNI hooks 2036 } else if (match_option(option, "-Xcheck", &tail)) { 2037 if (!strcmp(tail, ":jni")) { 2038 CheckJNICalls = true; 2039 } else if (is_bad_option(option, args->ignoreUnrecognized, 2040 "check")) { 2041 return JNI_EINVAL; 2042 } 2043 } else if (match_option(option, "vfprintf", &tail)) { 2044 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 2045 } else if (match_option(option, "exit", &tail)) { 2046 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 2047 } else if (match_option(option, "abort", &tail)) { 2048 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 2049 // -XX:+AggressiveHeap 2050 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 2051 2052 // This option inspects the machine and attempts to set various 2053 // parameters to be optimal for long-running, memory allocation 2054 // intensive jobs. It is intended for machines with large 2055 // amounts of cpu and memory. 2056 2057 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 2058 // VM, but we may not be able to represent the total physical memory 2059 // available (like having 8gb of memory on a box but using a 32bit VM). 2060 // Thus, we need to make sure we're using a julong for intermediate 2061 // calculations. 2062 julong initHeapSize; 2063 julong total_memory = os::physical_memory(); 2064 2065 if (total_memory < (julong)256*M) { 2066 jio_fprintf(defaultStream::error_stream(), 2067 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 2068 vm_exit(1); 2069 } 2070 2071 // The heap size is half of available memory, or (at most) 2072 // all of possible memory less 160mb (leaving room for the OS 2073 // when using ISM). This is the maximum; because adaptive sizing 2074 // is turned on below, the actual space used may be smaller. 2075 2076 initHeapSize = MIN2(total_memory / (julong)2, 2077 total_memory - (julong)160*M); 2078 2079 // Make sure that if we have a lot of memory we cap the 32 bit 2080 // process space. The 64bit VM version of this function is a nop. 2081 initHeapSize = os::allocatable_physical_memory(initHeapSize); 2082 2083 // The perm gen is separate but contiguous with the 2084 // object heap (and is reserved with it) so subtract it 2085 // from the heap size. 2086 if (initHeapSize > MaxPermSize) { 2087 initHeapSize = initHeapSize - MaxPermSize; 2088 } else { 2089 warning("AggressiveHeap and MaxPermSize values may conflict"); 2090 } 2091 2092 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2093 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 2094 set_initial_heap_size(MaxHeapSize); 2095 // Currently the minimum size and the initial heap sizes are the same. 2096 set_min_heap_size(initial_heap_size()); 2097 } 2098 if (FLAG_IS_DEFAULT(NewSize)) { 2099 // Make the young generation 3/8ths of the total heap. 2100 FLAG_SET_CMDLINE(uintx, NewSize, 2101 ((julong)MaxHeapSize / (julong)8) * (julong)3); 2102 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 2103 } 2104 2105 FLAG_SET_DEFAULT(UseLargePages, true); 2106 2107 // Increase some data structure sizes for efficiency 2108 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 2109 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2110 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 2111 2112 // See the OldPLABSize comment below, but replace 'after promotion' 2113 // with 'after copying'. YoungPLABSize is the size of the survivor 2114 // space per-gc-thread buffers. The default is 4kw. 2115 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 2116 2117 // OldPLABSize is the size of the buffers in the old gen that 2118 // UseParallelGC uses to promote live data that doesn't fit in the 2119 // survivor spaces. At any given time, there's one for each gc thread. 2120 // The default size is 1kw. These buffers are rarely used, since the 2121 // survivor spaces are usually big enough. For specjbb, however, there 2122 // are occasions when there's lots of live data in the young gen 2123 // and we end up promoting some of it. We don't have a definite 2124 // explanation for why bumping OldPLABSize helps, but the theory 2125 // is that a bigger PLAB results in retaining something like the 2126 // original allocation order after promotion, which improves mutator 2127 // locality. A minor effect may be that larger PLABs reduce the 2128 // number of PLAB allocation events during gc. The value of 8kw 2129 // was arrived at by experimenting with specjbb. 2130 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 2131 2132 // CompilationPolicyChoice=0 causes the server compiler to adopt 2133 // a more conservative which-method-do-I-compile policy when one 2134 // of the counters maintained by the interpreter trips. The 2135 // result is reduced startup time and improved specjbb and 2136 // alacrity performance. Zero is the default, but we set it 2137 // explicitly here in case the default changes. 2138 // See runtime/compilationPolicy.*. 2139 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); 2140 2141 // Enable parallel GC and adaptive generation sizing 2142 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 2143 FLAG_SET_DEFAULT(ParallelGCThreads, 2144 Abstract_VM_Version::parallel_worker_threads()); 2145 2146 // Encourage steady state memory management 2147 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 2148 2149 // This appears to improve mutator locality 2150 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2151 2152 // Get around early Solaris scheduling bug 2153 // (affinity vs other jobs on system) 2154 // but disallow DR and offlining (5008695). 2155 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 2156 2157 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 2158 // The last option must always win. 2159 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 2160 FLAG_SET_CMDLINE(bool, NeverTenure, true); 2161 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 2162 // The last option must always win. 2163 FLAG_SET_CMDLINE(bool, NeverTenure, false); 2164 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 2165 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 2166 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 2167 jio_fprintf(defaultStream::error_stream(), 2168 "Please use CMSClassUnloadingEnabled in place of " 2169 "CMSPermGenSweepingEnabled in the future\n"); 2170 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 2171 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 2172 jio_fprintf(defaultStream::error_stream(), 2173 "Please use -XX:+UseGCOverheadLimit in place of " 2174 "-XX:+UseGCTimeLimit in the future\n"); 2175 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 2176 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 2177 jio_fprintf(defaultStream::error_stream(), 2178 "Please use -XX:-UseGCOverheadLimit in place of " 2179 "-XX:-UseGCTimeLimit in the future\n"); 2180 // The TLE options are for compatibility with 1.3 and will be 2181 // removed without notice in a future release. These options 2182 // are not to be documented. 2183 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 2184 // No longer used. 2185 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 2186 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 2187 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 2188 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2189 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 2190 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 2191 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 2192 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 2193 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 2194 // No longer used. 2195 } else if (match_option(option, "-XX:TLESize=", &tail)) { 2196 jlong long_tlab_size = 0; 2197 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 2198 if (errcode != arg_in_range) { 2199 jio_fprintf(defaultStream::error_stream(), 2200 "Invalid TLAB size: %s\n", option->optionString); 2201 describe_range_error(errcode); 2202 return JNI_EINVAL; 2203 } 2204 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 2205 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 2206 // No longer used. 2207 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 2208 FLAG_SET_CMDLINE(bool, UseTLAB, true); 2209 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 2210 FLAG_SET_CMDLINE(bool, UseTLAB, false); 2211SOLARIS_ONLY( 2212 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { 2213 warning("-XX:+UsePermISM is obsolete."); 2214 FLAG_SET_CMDLINE(bool, UseISM, true); 2215 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { 2216 FLAG_SET_CMDLINE(bool, UseISM, false); 2217) 2218 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 2219 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 2220 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 2221 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 2222 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 2223 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 2224 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 2225#ifdef SOLARIS 2226 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 2227 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 2228 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 2229 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 2230#else // ndef SOLARIS 2231 jio_fprintf(defaultStream::error_stream(), 2232 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); 2233 return JNI_EINVAL; 2234#endif // ndef SOLARIS 2235 } else 2236#ifdef ASSERT 2237 if (match_option(option, "-XX:+FullGCALot", &tail)) { 2238 FLAG_SET_CMDLINE(bool, FullGCALot, true); 2239 // disable scavenge before parallel mark-compact 2240 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2241 } else 2242#endif 2243 if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 2244 julong cms_blocks_to_claim = (julong)atol(tail); 2245 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 2246 jio_fprintf(defaultStream::error_stream(), 2247 "Please use -XX:CMSParPromoteBlocksToClaim in place of " 2248 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 2249 } else 2250 if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 2251 jlong old_plab_size = 0; 2252 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 2253 if (errcode != arg_in_range) { 2254 jio_fprintf(defaultStream::error_stream(), 2255 "Invalid old PLAB size: %s\n", option->optionString); 2256 describe_range_error(errcode); 2257 return JNI_EINVAL; 2258 } 2259 FLAG_SET_CMDLINE(uintx, OldPLABSize, (julong)old_plab_size); 2260 jio_fprintf(defaultStream::error_stream(), 2261 "Please use -XX:OldPLABSize in place of " 2262 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 2263 } else 2264 if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 2265 jlong young_plab_size = 0; 2266 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 2267 if (errcode != arg_in_range) { 2268 jio_fprintf(defaultStream::error_stream(), 2269 "Invalid young PLAB size: %s\n", option->optionString); 2270 describe_range_error(errcode); 2271 return JNI_EINVAL; 2272 } 2273 FLAG_SET_CMDLINE(uintx, YoungPLABSize, (julong)young_plab_size); 2274 jio_fprintf(defaultStream::error_stream(), 2275 "Please use -XX:YoungPLABSize in place of " 2276 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 2277 } else 2278 if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 2279 // Skip -XX:Flags= since that case has already been handled 2280 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 2281 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 2282 return JNI_EINVAL; 2283 } 2284 } 2285 // Unknown option 2286 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 2287 return JNI_ERR; 2288 } 2289 } 2290 2291 return JNI_OK; 2292} 2293 2294jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 2295 // This must be done after all -D arguments have been processed. 2296 scp_p->expand_endorsed(); 2297 2298 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { 2299 // Assemble the bootclasspath elements into the final path. 2300 Arguments::set_sysclasspath(scp_p->combined_path()); 2301 } 2302 2303 // This must be done after all arguments have been processed. 2304 // java_compiler() true means set to "NONE" or empty. 2305 if (java_compiler() && !xdebug_mode()) { 2306 // For backwards compatibility, we switch to interpreted mode if 2307 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 2308 // not specified. 2309 set_mode_flags(_int); 2310 } 2311 if (CompileThreshold == 0) { 2312 set_mode_flags(_int); 2313 } 2314 2315#ifdef TIERED 2316 // If we are using tiered compilation in the tiered vm then c1 will 2317 // do the profiling and we don't want to waste that time in the 2318 // interpreter. 2319 if (TieredCompilation) { 2320 ProfileInterpreter = false; 2321 } else { 2322 // Since we are running vanilla server we must adjust the compile threshold 2323 // unless the user has already adjusted it because the default threshold assumes 2324 // we will run tiered. 2325 2326 if (FLAG_IS_DEFAULT(CompileThreshold)) { 2327 CompileThreshold = Tier2CompileThreshold; 2328 } 2329 } 2330#endif // TIERED 2331 2332#ifndef COMPILER2 2333 // Don't degrade server performance for footprint 2334 if (FLAG_IS_DEFAULT(UseLargePages) && 2335 MaxHeapSize < LargePageHeapSizeThreshold) { 2336 // No need for large granularity pages w/small heaps. 2337 // Note that large pages are enabled/disabled for both the 2338 // Java heap and the code cache. 2339 FLAG_SET_DEFAULT(UseLargePages, false); 2340 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); 2341 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); 2342 } 2343 2344#else 2345 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 2346 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 2347 } 2348 // Temporary disable bulk zeroing reduction with G1. See CR 6627983. 2349 if (UseG1GC) { 2350 FLAG_SET_DEFAULT(ReduceBulkZeroing, false); 2351 } 2352#endif 2353 2354 if (!check_vm_args_consistency()) { 2355 return JNI_ERR; 2356 } 2357 2358 return JNI_OK; 2359} 2360 2361jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2362 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 2363 scp_assembly_required_p); 2364} 2365 2366jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2367 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 2368 scp_assembly_required_p); 2369} 2370 2371jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 2372 const int N_MAX_OPTIONS = 64; 2373 const int OPTION_BUFFER_SIZE = 1024; 2374 char buffer[OPTION_BUFFER_SIZE]; 2375 2376 // The variable will be ignored if it exceeds the length of the buffer. 2377 // Don't check this variable if user has special privileges 2378 // (e.g. unix su command). 2379 if (os::getenv(name, buffer, sizeof(buffer)) && 2380 !os::have_special_privileges()) { 2381 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 2382 jio_fprintf(defaultStream::error_stream(), 2383 "Picked up %s: %s\n", name, buffer); 2384 char* rd = buffer; // pointer to the input string (rd) 2385 int i; 2386 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 2387 while (isspace(*rd)) rd++; // skip whitespace 2388 if (*rd == 0) break; // we re done when the input string is read completely 2389 2390 // The output, option string, overwrites the input string. 2391 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 2392 // input string (rd). 2393 char* wrt = rd; 2394 2395 options[i++].optionString = wrt; // Fill in option 2396 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 2397 if (*rd == '\'' || *rd == '"') { // handle a quoted string 2398 int quote = *rd; // matching quote to look for 2399 rd++; // don't copy open quote 2400 while (*rd != quote) { // include everything (even spaces) up until quote 2401 if (*rd == 0) { // string termination means unmatched string 2402 jio_fprintf(defaultStream::error_stream(), 2403 "Unmatched quote in %s\n", name); 2404 return JNI_ERR; 2405 } 2406 *wrt++ = *rd++; // copy to option string 2407 } 2408 rd++; // don't copy close quote 2409 } else { 2410 *wrt++ = *rd++; // copy to option string 2411 } 2412 } 2413 // Need to check if we're done before writing a NULL, 2414 // because the write could be to the byte that rd is pointing to. 2415 if (*rd++ == 0) { 2416 *wrt = 0; 2417 break; 2418 } 2419 *wrt = 0; // Zero terminate option 2420 } 2421 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 2422 JavaVMInitArgs vm_args; 2423 vm_args.version = JNI_VERSION_1_2; 2424 vm_args.options = options; 2425 vm_args.nOptions = i; 2426 vm_args.ignoreUnrecognized = false; 2427 2428 if (PrintVMOptions) { 2429 const char* tail; 2430 for (int i = 0; i < vm_args.nOptions; i++) { 2431 const JavaVMOption *option = vm_args.options + i; 2432 if (match_option(option, "-XX:", &tail)) { 2433 logOption(tail); 2434 } 2435 } 2436 } 2437 2438 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); 2439 } 2440 return JNI_OK; 2441} 2442 2443// Parse entry point called from JNI_CreateJavaVM 2444 2445jint Arguments::parse(const JavaVMInitArgs* args) { 2446 2447 // Sharing support 2448 // Construct the path to the archive 2449 char jvm_path[JVM_MAXPATHLEN]; 2450 os::jvm_path(jvm_path, sizeof(jvm_path)); 2451#ifdef TIERED 2452 if (strstr(jvm_path, "client") != NULL) { 2453 force_client_mode = true; 2454 } 2455#endif // TIERED 2456 char *end = strrchr(jvm_path, *os::file_separator()); 2457 if (end != NULL) *end = '\0'; 2458 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + 2459 strlen(os::file_separator()) + 20); 2460 if (shared_archive_path == NULL) return JNI_ENOMEM; 2461 strcpy(shared_archive_path, jvm_path); 2462 strcat(shared_archive_path, os::file_separator()); 2463 strcat(shared_archive_path, "classes"); 2464 DEBUG_ONLY(strcat(shared_archive_path, "_g");) 2465 strcat(shared_archive_path, ".jsa"); 2466 SharedArchivePath = shared_archive_path; 2467 2468 // Remaining part of option string 2469 const char* tail; 2470 2471 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 2472 bool settings_file_specified = false; 2473 int index; 2474 for (index = 0; index < args->nOptions; index++) { 2475 const JavaVMOption *option = args->options + index; 2476 if (match_option(option, "-XX:Flags=", &tail)) { 2477 if (!process_settings_file(tail, true, args->ignoreUnrecognized)) { 2478 return JNI_EINVAL; 2479 } 2480 settings_file_specified = true; 2481 } 2482 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 2483 PrintVMOptions = true; 2484 } 2485 } 2486 2487 // Parse default .hotspotrc settings file 2488 if (!settings_file_specified) { 2489 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 2490 return JNI_EINVAL; 2491 } 2492 } 2493 2494 if (PrintVMOptions) { 2495 for (index = 0; index < args->nOptions; index++) { 2496 const JavaVMOption *option = args->options + index; 2497 if (match_option(option, "-XX:", &tail)) { 2498 logOption(tail); 2499 } 2500 } 2501 } 2502 2503 2504 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 2505 jint result = parse_vm_init_args(args); 2506 if (result != JNI_OK) { 2507 return result; 2508 } 2509 2510 // These are hacks until G1 is fully supported and tested 2511 // but lets you force -XX:+UseG1GC in PRT and get it where it (mostly) works 2512 if (UseG1GC) { 2513 if (UseConcMarkSweepGC || UseParNewGC || UseParallelGC || UseParallelOldGC || UseSerialGC) { 2514#ifndef PRODUCT 2515 tty->print_cr("-XX:+UseG1GC is incompatible with other collectors, using UseG1GC"); 2516#endif // PRODUCT 2517 UseConcMarkSweepGC = false; 2518 UseParNewGC = false; 2519 UseParallelGC = false; 2520 UseParallelOldGC = false; 2521 UseSerialGC = false; 2522 } 2523 no_shared_spaces(); 2524 } 2525 2526#ifndef PRODUCT 2527 if (TraceBytecodesAt != 0) { 2528 TraceBytecodes = true; 2529 } 2530 if (CountCompiledCalls) { 2531 if (UseCounterDecay) { 2532 warning("UseCounterDecay disabled because CountCalls is set"); 2533 UseCounterDecay = false; 2534 } 2535 } 2536#endif // PRODUCT 2537 2538 if (PrintGCDetails) { 2539 // Turn on -verbose:gc options as well 2540 PrintGC = true; 2541 if (FLAG_IS_DEFAULT(TraceClassUnloading)) { 2542 TraceClassUnloading = true; 2543 } 2544 } 2545 2546#ifdef SERIALGC 2547 set_serial_gc_flags(); 2548#endif // SERIALGC 2549#ifdef KERNEL 2550 no_shared_spaces(); 2551#endif // KERNEL 2552 2553 // Set flags based on ergonomics. 2554 set_ergonomics_flags(); 2555 2556 // Check the GC selections again. 2557 if (!check_gc_consistency()) { 2558 return JNI_EINVAL; 2559 } 2560 2561 if (UseParallelGC || UseParallelOldGC) { 2562 // Set some flags for ParallelGC if needed. 2563 set_parallel_gc_flags(); 2564 } else if (UseConcMarkSweepGC) { 2565 // Set some flags for CMS 2566 set_cms_and_parnew_gc_flags(); 2567 } else if (UseParNewGC) { 2568 // Set some flags for ParNew 2569 set_parnew_gc_flags(); 2570 } 2571 // Temporary; make the "if" an "else-if" before 2572 // we integrate G1. XXX 2573 if (UseG1GC) { 2574 // Set some flags for garbage-first, if needed. 2575 set_g1_gc_flags(); 2576 } 2577 2578#ifdef SERIALGC 2579 assert(verify_serial_gc_flags(), "SerialGC unset"); 2580#endif // SERIALGC 2581 2582 // Set bytecode rewriting flags 2583 set_bytecode_flags(); 2584 2585 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. 2586 set_aggressive_opts_flags(); 2587 2588#ifdef CC_INTERP 2589 // Biased locking is not implemented with c++ interpreter 2590 FLAG_SET_DEFAULT(UseBiasedLocking, false); 2591#endif /* CC_INTERP */ 2592 2593 if (PrintCommandLineFlags) { 2594 CommandLineFlags::printSetFlags(); 2595 } 2596 2597#ifdef ASSERT 2598 if (PrintFlagsFinal) { 2599 CommandLineFlags::printFlags(); 2600 } 2601#endif 2602 2603 return JNI_OK; 2604} 2605 2606int Arguments::PropertyList_count(SystemProperty* pl) { 2607 int count = 0; 2608 while(pl != NULL) { 2609 count++; 2610 pl = pl->next(); 2611 } 2612 return count; 2613} 2614 2615const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 2616 assert(key != NULL, "just checking"); 2617 SystemProperty* prop; 2618 for (prop = pl; prop != NULL; prop = prop->next()) { 2619 if (strcmp(key, prop->key()) == 0) return prop->value(); 2620 } 2621 return NULL; 2622} 2623 2624const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 2625 int count = 0; 2626 const char* ret_val = NULL; 2627 2628 while(pl != NULL) { 2629 if(count >= index) { 2630 ret_val = pl->key(); 2631 break; 2632 } 2633 count++; 2634 pl = pl->next(); 2635 } 2636 2637 return ret_val; 2638} 2639 2640char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 2641 int count = 0; 2642 char* ret_val = NULL; 2643 2644 while(pl != NULL) { 2645 if(count >= index) { 2646 ret_val = pl->value(); 2647 break; 2648 } 2649 count++; 2650 pl = pl->next(); 2651 } 2652 2653 return ret_val; 2654} 2655 2656void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 2657 SystemProperty* p = *plist; 2658 if (p == NULL) { 2659 *plist = new_p; 2660 } else { 2661 while (p->next() != NULL) { 2662 p = p->next(); 2663 } 2664 p->set_next(new_p); 2665 } 2666} 2667 2668void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 2669 if (plist == NULL) 2670 return; 2671 2672 SystemProperty* new_p = new SystemProperty(k, v, true); 2673 PropertyList_add(plist, new_p); 2674} 2675 2676// This add maintains unique property key in the list. 2677void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 2678 if (plist == NULL) 2679 return; 2680 2681 // If property key exist then update with new value. 2682 SystemProperty* prop; 2683 for (prop = *plist; prop != NULL; prop = prop->next()) { 2684 if (strcmp(k, prop->key()) == 0) { 2685 prop->set_value(v); 2686 return; 2687 } 2688 } 2689 2690 PropertyList_add(plist, k, v); 2691} 2692 2693#ifdef KERNEL 2694char *Arguments::get_kernel_properties() { 2695 // Find properties starting with kernel and append them to string 2696 // We need to find out how long they are first because the URL's that they 2697 // might point to could get long. 2698 int length = 0; 2699 SystemProperty* prop; 2700 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2701 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2702 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" 2703 } 2704 } 2705 // Add one for null terminator. 2706 char *props = AllocateHeap(length + 1, "get_kernel_properties"); 2707 if (length != 0) { 2708 int pos = 0; 2709 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2710 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2711 jio_snprintf(&props[pos], length-pos, 2712 "-D%s=%s ", prop->key(), prop->value()); 2713 pos = strlen(props); 2714 } 2715 } 2716 } 2717 // null terminate props in case of null 2718 props[length] = '\0'; 2719 return props; 2720} 2721#endif // KERNEL 2722 2723// Copies src into buf, replacing "%%" with "%" and "%p" with pid 2724// Returns true if all of the source pointed by src has been copied over to 2725// the destination buffer pointed by buf. Otherwise, returns false. 2726// Notes: 2727// 1. If the length (buflen) of the destination buffer excluding the 2728// NULL terminator character is not long enough for holding the expanded 2729// pid characters, it also returns false instead of returning the partially 2730// expanded one. 2731// 2. The passed in "buflen" should be large enough to hold the null terminator. 2732bool Arguments::copy_expand_pid(const char* src, size_t srclen, 2733 char* buf, size_t buflen) { 2734 const char* p = src; 2735 char* b = buf; 2736 const char* src_end = &src[srclen]; 2737 char* buf_end = &buf[buflen - 1]; 2738 2739 while (p < src_end && b < buf_end) { 2740 if (*p == '%') { 2741 switch (*(++p)) { 2742 case '%': // "%%" ==> "%" 2743 *b++ = *p++; 2744 break; 2745 case 'p': { // "%p" ==> current process id 2746 // buf_end points to the character before the last character so 2747 // that we could write '\0' to the end of the buffer. 2748 size_t buf_sz = buf_end - b + 1; 2749 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 2750 2751 // if jio_snprintf fails or the buffer is not long enough to hold 2752 // the expanded pid, returns false. 2753 if (ret < 0 || ret >= (int)buf_sz) { 2754 return false; 2755 } else { 2756 b += ret; 2757 assert(*b == '\0', "fail in copy_expand_pid"); 2758 if (p == src_end && b == buf_end + 1) { 2759 // reach the end of the buffer. 2760 return true; 2761 } 2762 } 2763 p++; 2764 break; 2765 } 2766 default : 2767 *b++ = '%'; 2768 } 2769 } else { 2770 *b++ = *p++; 2771 } 2772 } 2773 *b = '\0'; 2774 return (p == src_end); // return false if not all of the source was copied 2775} 2776