arguments.cpp revision 0:a61af66fc99e
1/* 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25#include "incls/_precompiled.incl" 26#include "incls/_arguments.cpp.incl" 27 28#define DEFAULT_VENDOR_URL_BUG "http://java.sun.com/webapps/bugreport/crash.jsp" 29#define DEFAULT_JAVA_LAUNCHER "generic" 30 31char** Arguments::_jvm_flags_array = NULL; 32int Arguments::_num_jvm_flags = 0; 33char** Arguments::_jvm_args_array = NULL; 34int Arguments::_num_jvm_args = 0; 35char* Arguments::_java_command = NULL; 36SystemProperty* Arguments::_system_properties = NULL; 37const char* Arguments::_gc_log_filename = NULL; 38bool Arguments::_has_profile = false; 39bool Arguments::_has_alloc_profile = false; 40uintx Arguments::_initial_heap_size = 0; 41uintx Arguments::_min_heap_size = 0; 42Arguments::Mode Arguments::_mode = _mixed; 43bool Arguments::_java_compiler = false; 44bool Arguments::_xdebug_mode = false; 45const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 46const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 47int Arguments::_sun_java_launcher_pid = -1; 48 49// These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) 50bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 51bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 52bool Arguments::_BackgroundCompilation = BackgroundCompilation; 53bool Arguments::_ClipInlining = ClipInlining; 54intx Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 55 56char* Arguments::SharedArchivePath = NULL; 57 58AgentLibraryList Arguments::_libraryList; 59AgentLibraryList Arguments::_agentList; 60 61abort_hook_t Arguments::_abort_hook = NULL; 62exit_hook_t Arguments::_exit_hook = NULL; 63vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 64 65 66SystemProperty *Arguments::_java_ext_dirs = NULL; 67SystemProperty *Arguments::_java_endorsed_dirs = NULL; 68SystemProperty *Arguments::_sun_boot_library_path = NULL; 69SystemProperty *Arguments::_java_library_path = NULL; 70SystemProperty *Arguments::_java_home = NULL; 71SystemProperty *Arguments::_java_class_path = NULL; 72SystemProperty *Arguments::_sun_boot_class_path = NULL; 73 74char* Arguments::_meta_index_path = NULL; 75char* Arguments::_meta_index_dir = NULL; 76 77static bool force_client_mode = false; 78 79// Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string 80 81static bool match_option(const JavaVMOption *option, const char* name, 82 const char** tail) { 83 int len = (int)strlen(name); 84 if (strncmp(option->optionString, name, len) == 0) { 85 *tail = option->optionString + len; 86 return true; 87 } else { 88 return false; 89 } 90} 91 92static void logOption(const char* opt) { 93 if (PrintVMOptions) { 94 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 95 } 96} 97 98// Process java launcher properties. 99void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 100 // See if sun.java.launcher or sun.java.launcher.pid is defined. 101 // Must do this before setting up other system properties, 102 // as some of them may depend on launcher type. 103 for (int index = 0; index < args->nOptions; index++) { 104 const JavaVMOption* option = args->options + index; 105 const char* tail; 106 107 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 108 process_java_launcher_argument(tail, option->extraInfo); 109 continue; 110 } 111 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 112 _sun_java_launcher_pid = atoi(tail); 113 continue; 114 } 115 } 116} 117 118// Initialize system properties key and value. 119void Arguments::init_system_properties() { 120 121 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.version", "1.0", false)); 122 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 123 "Java Virtual Machine Specification", false)); 124 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.vendor", 125 "Sun Microsystems Inc.", false)); 126 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 127 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 128 PropertyList_add(&_system_properties, new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 129 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 130 131 // following are JVMTI agent writeable properties. 132 // Properties values are set to NULL and they are 133 // os specific they are initialized in os::init_system_properties_values(). 134 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); 135 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); 136 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 137 _java_library_path = new SystemProperty("java.library.path", NULL, true); 138 _java_home = new SystemProperty("java.home", NULL, true); 139 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); 140 141 _java_class_path = new SystemProperty("java.class.path", "", true); 142 143 // Add to System Property list. 144 PropertyList_add(&_system_properties, _java_ext_dirs); 145 PropertyList_add(&_system_properties, _java_endorsed_dirs); 146 PropertyList_add(&_system_properties, _sun_boot_library_path); 147 PropertyList_add(&_system_properties, _java_library_path); 148 PropertyList_add(&_system_properties, _java_home); 149 PropertyList_add(&_system_properties, _java_class_path); 150 PropertyList_add(&_system_properties, _sun_boot_class_path); 151 152 // Set OS specific system properties values 153 os::init_system_properties_values(); 154} 155 156// String containing commands that will be ignored and cause a 157// warning to be issued. These commands should be accepted 158// for 1.6 but not 1.7. The string should be cleared at the 159// beginning of 1.7. 160static const char* obsolete_jvm_flags_1_5_0[] = { 161 "UseTrainGC", 162 "UseSpecialLargeObjectHandling", 163 "UseOversizedCarHandling", 164 "TraceCarAllocation", 165 "PrintTrainGCProcessingStats", 166 "LogOfCarSpaceSize", 167 "OversizedCarThreshold", 168 "MinTickInterval", 169 "DefaultTickInterval", 170 "MaxTickInterval", 171 "DelayTickAdjustment", 172 "ProcessingToTenuringRatio", 173 "MinTrainLength", 174 0}; 175 176bool Arguments::made_obsolete_in_1_5_0(const char *s) { 177 int i = 0; 178 while (obsolete_jvm_flags_1_5_0[i] != NULL) { 179 // <flag>=xxx form 180 // [-|+]<flag> form 181 if ((strncmp(obsolete_jvm_flags_1_5_0[i], s, 182 strlen(obsolete_jvm_flags_1_5_0[i])) == 0) || 183 ((s[0] == '+' || s[0] == '-') && 184 (strncmp(obsolete_jvm_flags_1_5_0[i], &s[1], 185 strlen(obsolete_jvm_flags_1_5_0[i])) == 0))) { 186 return true; 187 } 188 i++; 189 } 190 return false; 191} 192 193// Constructs the system class path (aka boot class path) from the following 194// components, in order: 195// 196// prefix // from -Xbootclasspath/p:... 197// endorsed // the expansion of -Djava.endorsed.dirs=... 198// base // from os::get_system_properties() or -Xbootclasspath= 199// suffix // from -Xbootclasspath/a:... 200// 201// java.endorsed.dirs is a list of directories; any jar or zip files in the 202// directories are added to the sysclasspath just before the base. 203// 204// This could be AllStatic, but it isn't needed after argument processing is 205// complete. 206class SysClassPath: public StackObj { 207public: 208 SysClassPath(const char* base); 209 ~SysClassPath(); 210 211 inline void set_base(const char* base); 212 inline void add_prefix(const char* prefix); 213 inline void add_suffix(const char* suffix); 214 inline void reset_path(const char* base); 215 216 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs 217 // property. Must be called after all command-line arguments have been 218 // processed (in particular, -Djava.endorsed.dirs=...) and before calling 219 // combined_path(). 220 void expand_endorsed(); 221 222 inline const char* get_base() const { return _items[_scp_base]; } 223 inline const char* get_prefix() const { return _items[_scp_prefix]; } 224 inline const char* get_suffix() const { return _items[_scp_suffix]; } 225 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } 226 227 // Combine all the components into a single c-heap-allocated string; caller 228 // must free the string if/when no longer needed. 229 char* combined_path(); 230 231private: 232 // Utility routines. 233 static char* add_to_path(const char* path, const char* str, bool prepend); 234 static char* add_jars_to_path(char* path, const char* directory); 235 236 inline void reset_item_at(int index); 237 238 // Array indices for the items that make up the sysclasspath. All except the 239 // base are allocated in the C heap and freed by this class. 240 enum { 241 _scp_prefix, // from -Xbootclasspath/p:... 242 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... 243 _scp_base, // the default sysclasspath 244 _scp_suffix, // from -Xbootclasspath/a:... 245 _scp_nitems // the number of items, must be last. 246 }; 247 248 const char* _items[_scp_nitems]; 249 DEBUG_ONLY(bool _expansion_done;) 250}; 251 252SysClassPath::SysClassPath(const char* base) { 253 memset(_items, 0, sizeof(_items)); 254 _items[_scp_base] = base; 255 DEBUG_ONLY(_expansion_done = false;) 256} 257 258SysClassPath::~SysClassPath() { 259 // Free everything except the base. 260 for (int i = 0; i < _scp_nitems; ++i) { 261 if (i != _scp_base) reset_item_at(i); 262 } 263 DEBUG_ONLY(_expansion_done = false;) 264} 265 266inline void SysClassPath::set_base(const char* base) { 267 _items[_scp_base] = base; 268} 269 270inline void SysClassPath::add_prefix(const char* prefix) { 271 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); 272} 273 274inline void SysClassPath::add_suffix(const char* suffix) { 275 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); 276} 277 278inline void SysClassPath::reset_item_at(int index) { 279 assert(index < _scp_nitems && index != _scp_base, "just checking"); 280 if (_items[index] != NULL) { 281 FREE_C_HEAP_ARRAY(char, _items[index]); 282 _items[index] = NULL; 283 } 284} 285 286inline void SysClassPath::reset_path(const char* base) { 287 // Clear the prefix and suffix. 288 reset_item_at(_scp_prefix); 289 reset_item_at(_scp_suffix); 290 set_base(base); 291} 292 293//------------------------------------------------------------------------------ 294 295void SysClassPath::expand_endorsed() { 296 assert(_items[_scp_endorsed] == NULL, "can only be called once."); 297 298 const char* path = Arguments::get_property("java.endorsed.dirs"); 299 if (path == NULL) { 300 path = Arguments::get_endorsed_dir(); 301 assert(path != NULL, "no default for java.endorsed.dirs"); 302 } 303 304 char* expanded_path = NULL; 305 const char separator = *os::path_separator(); 306 const char* const end = path + strlen(path); 307 while (path < end) { 308 const char* tmp_end = strchr(path, separator); 309 if (tmp_end == NULL) { 310 expanded_path = add_jars_to_path(expanded_path, path); 311 path = end; 312 } else { 313 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); 314 memcpy(dirpath, path, tmp_end - path); 315 dirpath[tmp_end - path] = '\0'; 316 expanded_path = add_jars_to_path(expanded_path, dirpath); 317 FREE_C_HEAP_ARRAY(char, dirpath); 318 path = tmp_end + 1; 319 } 320 } 321 _items[_scp_endorsed] = expanded_path; 322 DEBUG_ONLY(_expansion_done = true;) 323} 324 325// Combine the bootclasspath elements, some of which may be null, into a single 326// c-heap-allocated string. 327char* SysClassPath::combined_path() { 328 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); 329 assert(_expansion_done, "must call expand_endorsed() first."); 330 331 size_t lengths[_scp_nitems]; 332 size_t total_len = 0; 333 334 const char separator = *os::path_separator(); 335 336 // Get the lengths. 337 int i; 338 for (i = 0; i < _scp_nitems; ++i) { 339 if (_items[i] != NULL) { 340 lengths[i] = strlen(_items[i]); 341 // Include space for the separator char (or a NULL for the last item). 342 total_len += lengths[i] + 1; 343 } 344 } 345 assert(total_len > 0, "empty sysclasspath not allowed"); 346 347 // Copy the _items to a single string. 348 char* cp = NEW_C_HEAP_ARRAY(char, total_len); 349 char* cp_tmp = cp; 350 for (i = 0; i < _scp_nitems; ++i) { 351 if (_items[i] != NULL) { 352 memcpy(cp_tmp, _items[i], lengths[i]); 353 cp_tmp += lengths[i]; 354 *cp_tmp++ = separator; 355 } 356 } 357 *--cp_tmp = '\0'; // Replace the extra separator. 358 return cp; 359} 360 361// Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 362char* 363SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { 364 char *cp; 365 366 assert(str != NULL, "just checking"); 367 if (path == NULL) { 368 size_t len = strlen(str) + 1; 369 cp = NEW_C_HEAP_ARRAY(char, len); 370 memcpy(cp, str, len); // copy the trailing null 371 } else { 372 const char separator = *os::path_separator(); 373 size_t old_len = strlen(path); 374 size_t str_len = strlen(str); 375 size_t len = old_len + str_len + 2; 376 377 if (prepend) { 378 cp = NEW_C_HEAP_ARRAY(char, len); 379 char* cp_tmp = cp; 380 memcpy(cp_tmp, str, str_len); 381 cp_tmp += str_len; 382 *cp_tmp = separator; 383 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null 384 FREE_C_HEAP_ARRAY(char, path); 385 } else { 386 cp = REALLOC_C_HEAP_ARRAY(char, path, len); 387 char* cp_tmp = cp + old_len; 388 *cp_tmp = separator; 389 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null 390 } 391 } 392 return cp; 393} 394 395// Scan the directory and append any jar or zip files found to path. 396// Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 397char* SysClassPath::add_jars_to_path(char* path, const char* directory) { 398 DIR* dir = os::opendir(directory); 399 if (dir == NULL) return path; 400 401 char dir_sep[2] = { '\0', '\0' }; 402 size_t directory_len = strlen(directory); 403 const char fileSep = *os::file_separator(); 404 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; 405 406 /* Scan the directory for jars/zips, appending them to path. */ 407 struct dirent *entry; 408 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); 409 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 410 const char* name = entry->d_name; 411 const char* ext = name + strlen(name) - 4; 412 bool isJarOrZip = ext > name && 413 (os::file_name_strcmp(ext, ".jar") == 0 || 414 os::file_name_strcmp(ext, ".zip") == 0); 415 if (isJarOrZip) { 416 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); 417 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); 418 path = add_to_path(path, jarpath, false); 419 FREE_C_HEAP_ARRAY(char, jarpath); 420 } 421 } 422 FREE_C_HEAP_ARRAY(char, dbuf); 423 os::closedir(dir); 424 return path; 425} 426 427// Parses a memory size specification string. 428static bool atomll(const char *s, jlong* result) { 429 jlong n = 0; 430 int args_read = sscanf(s, os::jlong_format_specifier(), &n); 431 if (args_read != 1) { 432 return false; 433 } 434 while (*s != '\0' && isdigit(*s)) { 435 s++; 436 } 437 // 4705540: illegal if more characters are found after the first non-digit 438 if (strlen(s) > 1) { 439 return false; 440 } 441 switch (*s) { 442 case 'T': case 't': 443 *result = n * G * K; 444 return true; 445 case 'G': case 'g': 446 *result = n * G; 447 return true; 448 case 'M': case 'm': 449 *result = n * M; 450 return true; 451 case 'K': case 'k': 452 *result = n * K; 453 return true; 454 case '\0': 455 *result = n; 456 return true; 457 default: 458 return false; 459 } 460} 461 462Arguments::ArgsRange Arguments::check_memory_size(jlong size, jlong min_size) { 463 if (size < min_size) return arg_too_small; 464 // Check that size will fit in a size_t (only relevant on 32-bit) 465 if ((julong) size > max_uintx) return arg_too_big; 466 return arg_in_range; 467} 468 469// Describe an argument out of range error 470void Arguments::describe_range_error(ArgsRange errcode) { 471 switch(errcode) { 472 case arg_too_big: 473 jio_fprintf(defaultStream::error_stream(), 474 "The specified size exceeds the maximum " 475 "representable size.\n"); 476 break; 477 case arg_too_small: 478 case arg_unreadable: 479 case arg_in_range: 480 // do nothing for now 481 break; 482 default: 483 ShouldNotReachHere(); 484 } 485} 486 487static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { 488 return CommandLineFlags::boolAtPut(name, &value, origin); 489} 490 491 492static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { 493 double v; 494 if (sscanf(value, "%lf", &v) != 1) { 495 return false; 496 } 497 498 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { 499 return true; 500 } 501 return false; 502} 503 504 505static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { 506 jlong v; 507 intx intx_v; 508 bool is_neg = false; 509 // Check the sign first since atomll() parses only unsigned values. 510 if (*value == '-') { 511 if (!CommandLineFlags::intxAt(name, &intx_v)) { 512 return false; 513 } 514 value++; 515 is_neg = true; 516 } 517 if (!atomll(value, &v)) { 518 return false; 519 } 520 intx_v = (intx) v; 521 if (is_neg) { 522 intx_v = -intx_v; 523 } 524 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { 525 return true; 526 } 527 uintx uintx_v = (uintx) v; 528 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { 529 return true; 530 } 531 return false; 532} 533 534 535static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { 536 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; 537 // Contract: CommandLineFlags always returns a pointer that needs freeing. 538 FREE_C_HEAP_ARRAY(char, value); 539 return true; 540} 541 542static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { 543 const char* old_value = ""; 544 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; 545 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 546 size_t new_len = strlen(new_value); 547 const char* value; 548 char* free_this_too = NULL; 549 if (old_len == 0) { 550 value = new_value; 551 } else if (new_len == 0) { 552 value = old_value; 553 } else { 554 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); 555 // each new setting adds another LINE to the switch: 556 sprintf(buf, "%s\n%s", old_value, new_value); 557 value = buf; 558 free_this_too = buf; 559 } 560 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 561 // CommandLineFlags always returns a pointer that needs freeing. 562 FREE_C_HEAP_ARRAY(char, value); 563 if (free_this_too != NULL) { 564 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 565 FREE_C_HEAP_ARRAY(char, free_this_too); 566 } 567 return true; 568} 569 570 571bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { 572 573 // range of acceptable characters spelled out for portability reasons 574#define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 575#define BUFLEN 255 576 char name[BUFLEN+1]; 577 char dummy; 578 579 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 580 return set_bool_flag(name, false, origin); 581 } 582 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 583 return set_bool_flag(name, true, origin); 584 } 585 586 char punct; 587 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 588 const char* value = strchr(arg, '=') + 1; 589 Flag* flag = Flag::find_flag(name, strlen(name)); 590 if (flag != NULL && flag->is_ccstr()) { 591 if (flag->ccstr_accumulates()) { 592 return append_to_string_flag(name, value, origin); 593 } else { 594 if (value[0] == '\0') { 595 value = NULL; 596 } 597 return set_string_flag(name, value, origin); 598 } 599 } 600 } 601 602 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 603 const char* value = strchr(arg, '=') + 1; 604 // -XX:Foo:=xxx will reset the string flag to the given value. 605 if (value[0] == '\0') { 606 value = NULL; 607 } 608 return set_string_flag(name, value, origin); 609 } 610 611#define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" 612#define SIGNED_NUMBER_RANGE "[-0123456789]" 613#define NUMBER_RANGE "[0123456789]" 614 char value[BUFLEN + 1]; 615 char value2[BUFLEN + 1]; 616 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 617 // Looks like a floating-point number -- try again with more lenient format string 618 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 619 return set_fp_numeric_flag(name, value, origin); 620 } 621 } 622 623#define VALUE_RANGE "[-kmgtKMGT0123456789]" 624 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 625 return set_numeric_flag(name, value, origin); 626 } 627 628 return false; 629} 630 631 632void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 633 assert(bldarray != NULL, "illegal argument"); 634 635 if (arg == NULL) { 636 return; 637 } 638 639 int index = *count; 640 641 // expand the array and add arg to the last element 642 (*count)++; 643 if (*bldarray == NULL) { 644 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); 645 } else { 646 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); 647 } 648 (*bldarray)[index] = strdup(arg); 649} 650 651void Arguments::build_jvm_args(const char* arg) { 652 add_string(&_jvm_args_array, &_num_jvm_args, arg); 653} 654 655void Arguments::build_jvm_flags(const char* arg) { 656 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 657} 658 659// utility function to return a string that concatenates all 660// strings in a given char** array 661const char* Arguments::build_resource_string(char** args, int count) { 662 if (args == NULL || count == 0) { 663 return NULL; 664 } 665 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator 666 for (int i = 1; i < count; i++) { 667 length += strlen(args[i]) + 1; // add 1 for a space 668 } 669 char* s = NEW_RESOURCE_ARRAY(char, length); 670 strcpy(s, args[0]); 671 for (int j = 1; j < count; j++) { 672 strcat(s, " "); 673 strcat(s, args[j]); 674 } 675 return (const char*) s; 676} 677 678void Arguments::print_on(outputStream* st) { 679 st->print_cr("VM Arguments:"); 680 if (num_jvm_flags() > 0) { 681 st->print("jvm_flags: "); print_jvm_flags_on(st); 682 } 683 if (num_jvm_args() > 0) { 684 st->print("jvm_args: "); print_jvm_args_on(st); 685 } 686 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 687 st->print_cr("Launcher Type: %s", _sun_java_launcher); 688} 689 690void Arguments::print_jvm_flags_on(outputStream* st) { 691 if (_num_jvm_flags > 0) { 692 for (int i=0; i < _num_jvm_flags; i++) { 693 st->print("%s ", _jvm_flags_array[i]); 694 } 695 st->print_cr(""); 696 } 697} 698 699void Arguments::print_jvm_args_on(outputStream* st) { 700 if (_num_jvm_args > 0) { 701 for (int i=0; i < _num_jvm_args; i++) { 702 st->print("%s ", _jvm_args_array[i]); 703 } 704 st->print_cr(""); 705 } 706} 707 708bool Arguments::process_argument(const char* arg, jboolean ignore_unrecognized, FlagValueOrigin origin) { 709 710 if (parse_argument(arg, origin)) { 711 // do nothing 712 } else if (made_obsolete_in_1_5_0(arg)) { 713 jio_fprintf(defaultStream::error_stream(), 714 "Warning: The flag %s has been EOL'd as of 1.5.0 and will" 715 " be ignored\n", arg); 716 } else { 717 if (!ignore_unrecognized) { 718 jio_fprintf(defaultStream::error_stream(), 719 "Unrecognized VM option '%s'\n", arg); 720 // allow for commandline "commenting out" options like -XX:#+Verbose 721 if (strlen(arg) == 0 || arg[0] != '#') { 722 return false; 723 } 724 } 725 } 726 return true; 727} 728 729 730bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 731 FILE* stream = fopen(file_name, "rb"); 732 if (stream == NULL) { 733 if (should_exist) { 734 jio_fprintf(defaultStream::error_stream(), 735 "Could not open settings file %s\n", file_name); 736 return false; 737 } else { 738 return true; 739 } 740 } 741 742 char token[1024]; 743 int pos = 0; 744 745 bool in_white_space = true; 746 bool in_comment = false; 747 bool in_quote = false; 748 char quote_c = 0; 749 bool result = true; 750 751 int c = getc(stream); 752 while(c != EOF) { 753 if (in_white_space) { 754 if (in_comment) { 755 if (c == '\n') in_comment = false; 756 } else { 757 if (c == '#') in_comment = true; 758 else if (!isspace(c)) { 759 in_white_space = false; 760 token[pos++] = c; 761 } 762 } 763 } else { 764 if (c == '\n' || (!in_quote && isspace(c))) { 765 // token ends at newline, or at unquoted whitespace 766 // this allows a way to include spaces in string-valued options 767 token[pos] = '\0'; 768 logOption(token); 769 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); 770 build_jvm_flags(token); 771 pos = 0; 772 in_white_space = true; 773 in_quote = false; 774 } else if (!in_quote && (c == '\'' || c == '"')) { 775 in_quote = true; 776 quote_c = c; 777 } else if (in_quote && (c == quote_c)) { 778 in_quote = false; 779 } else { 780 token[pos++] = c; 781 } 782 } 783 c = getc(stream); 784 } 785 if (pos > 0) { 786 token[pos] = '\0'; 787 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); 788 build_jvm_flags(token); 789 } 790 fclose(stream); 791 return result; 792} 793 794//============================================================================================================= 795// Parsing of properties (-D) 796 797const char* Arguments::get_property(const char* key) { 798 return PropertyList_get_value(system_properties(), key); 799} 800 801bool Arguments::add_property(const char* prop) { 802 const char* eq = strchr(prop, '='); 803 char* key; 804 // ns must be static--its address may be stored in a SystemProperty object. 805 const static char ns[1] = {0}; 806 char* value = (char *)ns; 807 808 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); 809 key = AllocateHeap(key_len + 1, "add_property"); 810 strncpy(key, prop, key_len); 811 key[key_len] = '\0'; 812 813 if (eq != NULL) { 814 size_t value_len = strlen(prop) - key_len - 1; 815 value = AllocateHeap(value_len + 1, "add_property"); 816 strncpy(value, &prop[key_len + 1], value_len + 1); 817 } 818 819 if (strcmp(key, "java.compiler") == 0) { 820 process_java_compiler_argument(value); 821 FreeHeap(key); 822 if (eq != NULL) { 823 FreeHeap(value); 824 } 825 return true; 826 } 827 else if (strcmp(key, "sun.java.command") == 0) { 828 829 _java_command = value; 830 831 // don't add this property to the properties exposed to the java application 832 FreeHeap(key); 833 return true; 834 } 835 else if (strcmp(key, "sun.java.launcher.pid") == 0) { 836 // launcher.pid property is private and is processed 837 // in process_sun_java_launcher_properties(); 838 // the sun.java.launcher property is passed on to the java application 839 FreeHeap(key); 840 if (eq != NULL) { 841 FreeHeap(value); 842 } 843 return true; 844 } 845 else if (strcmp(key, "java.vendor.url.bug") == 0) { 846 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 847 // its value without going through the property list or making a Java call. 848 _java_vendor_url_bug = value; 849 } 850 851 // Create new property and add at the end of the list 852 PropertyList_unique_add(&_system_properties, key, value); 853 return true; 854} 855 856//=========================================================================================================== 857// Setting int/mixed/comp mode flags 858 859void Arguments::set_mode_flags(Mode mode) { 860 // Set up default values for all flags. 861 // If you add a flag to any of the branches below, 862 // add a default value for it here. 863 set_java_compiler(false); 864 _mode = mode; 865 866 // Ensure Agent_OnLoad has the correct initial values. 867 // This may not be the final mode; mode may change later in onload phase. 868 PropertyList_unique_add(&_system_properties, "java.vm.info", 869 (char*)Abstract_VM_Version::vm_info_string()); 870 871 UseInterpreter = true; 872 UseCompiler = true; 873 UseLoopCounter = true; 874 875 // Default values may be platform/compiler dependent - 876 // use the saved values 877 ClipInlining = Arguments::_ClipInlining; 878 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 879 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 880 BackgroundCompilation = Arguments::_BackgroundCompilation; 881 Tier2CompileThreshold = Arguments::_Tier2CompileThreshold; 882 883 // Change from defaults based on mode 884 switch (mode) { 885 default: 886 ShouldNotReachHere(); 887 break; 888 case _int: 889 UseCompiler = false; 890 UseLoopCounter = false; 891 AlwaysCompileLoopMethods = false; 892 UseOnStackReplacement = false; 893 break; 894 case _mixed: 895 // same as default 896 break; 897 case _comp: 898 UseInterpreter = false; 899 BackgroundCompilation = false; 900 ClipInlining = false; 901 break; 902 } 903} 904 905 906// Conflict: required to use shared spaces (-Xshare:on), but 907// incompatible command line options were chosen. 908 909static void no_shared_spaces() { 910 if (RequireSharedSpaces) { 911 jio_fprintf(defaultStream::error_stream(), 912 "Class data sharing is inconsistent with other specified options.\n"); 913 vm_exit_during_initialization("Unable to use shared archive.", NULL); 914 } else { 915 FLAG_SET_DEFAULT(UseSharedSpaces, false); 916 } 917} 918 919 920// If the user has chosen ParallelGCThreads > 0, we set UseParNewGC 921// if it's not explictly set or unset. If the user has chosen 922// UseParNewGC and not explicitly set ParallelGCThreads we 923// set it, unless this is a single cpu machine. 924void Arguments::set_parnew_gc_flags() { 925 assert(!UseSerialGC && !UseParallelGC, "control point invariant"); 926 927 if (FLAG_IS_DEFAULT(UseParNewGC) && ParallelGCThreads > 1) { 928 FLAG_SET_DEFAULT(UseParNewGC, true); 929 } else if (UseParNewGC && ParallelGCThreads == 0) { 930 FLAG_SET_DEFAULT(ParallelGCThreads, nof_parallel_gc_threads()); 931 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 932 FLAG_SET_DEFAULT(UseParNewGC, false); 933 } 934 } 935 if (!UseParNewGC) { 936 FLAG_SET_DEFAULT(ParallelGCThreads, 0); 937 } else { 938 no_shared_spaces(); 939 940 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 correspondinly, 941 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 942 // we set them to 1024 and 1024. 943 // See CR 6362902. 944 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 945 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 946 } 947 if (FLAG_IS_DEFAULT(OldPLABSize)) { 948 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 949 } 950 951 // AlwaysTenure flag should make ParNew to promote all at first collection. 952 // See CR 6362902. 953 if (AlwaysTenure) { 954 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); 955 } 956 } 957} 958 959// CAUTION: this code is currently shared by UseParallelGC, UseParNewGC and 960// UseconcMarkSweepGC. Further tuning of individual collectors might 961// dictate refinement on a per-collector basis. 962int Arguments::nof_parallel_gc_threads() { 963 if (FLAG_IS_DEFAULT(ParallelGCThreads)) { 964 // For very large machines, there are diminishing returns 965 // for large numbers of worker threads. Instead of 966 // hogging the whole system, use 5/8ths of a worker for every 967 // processor after the first 8. For example, on a 72 cpu 968 // machine use 8 + (72 - 8) * (5/8) == 48 worker threads. 969 // This is just a start and needs further tuning and study in 970 // Tiger. 971 int ncpus = os::active_processor_count(); 972 return (ncpus <= 8) ? ncpus : 3 + ((ncpus * 5) / 8); 973 } else { 974 return ParallelGCThreads; 975 } 976} 977 978// Adjust some sizes to suit CMS and/or ParNew needs; these work well on 979// sparc/solaris for certain applications, but would gain from 980// further optimization and tuning efforts, and would almost 981// certainly gain from analysis of platform and environment. 982void Arguments::set_cms_and_parnew_gc_flags() { 983 if (UseSerialGC || UseParallelGC) { 984 return; 985 } 986 987 // If we are using CMS, we prefer to UseParNewGC, 988 // unless explicitly forbidden. 989 if (UseConcMarkSweepGC && !UseParNewGC && FLAG_IS_DEFAULT(UseParNewGC)) { 990 FLAG_SET_DEFAULT(UseParNewGC, true); 991 } 992 993 // Turn off AdaptiveSizePolicy by default for cms until it is 994 // complete. Also turn it off in general if the 995 // parnew collector has been selected. 996 if ((UseConcMarkSweepGC || UseParNewGC) && 997 FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { 998 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 999 } 1000 1001 // In either case, adjust ParallelGCThreads and/or UseParNewGC 1002 // as needed. 1003 set_parnew_gc_flags(); 1004 1005 if (!UseConcMarkSweepGC) { 1006 return; 1007 } 1008 1009 // Now make adjustments for CMS 1010 size_t young_gen_per_worker; 1011 intx new_ratio; 1012 size_t min_new_default; 1013 intx tenuring_default; 1014 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 1015 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { 1016 FLAG_SET_DEFAULT(CMSYoungGenPerWorker, 4*M); 1017 } 1018 young_gen_per_worker = 4*M; 1019 new_ratio = (intx)15; 1020 min_new_default = 4*M; 1021 tenuring_default = (intx)0; 1022 } else { // new defaults: "new" as of 6.0 1023 young_gen_per_worker = CMSYoungGenPerWorker; 1024 new_ratio = (intx)7; 1025 min_new_default = 16*M; 1026 tenuring_default = (intx)4; 1027 } 1028 1029 // Preferred young gen size for "short" pauses 1030 const uintx parallel_gc_threads = 1031 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); 1032 const size_t preferred_max_new_size_unaligned = 1033 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); 1034 const size_t preferred_max_new_size = 1035 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1036 1037 // Unless explicitly requested otherwise, size young gen 1038 // for "short" pauses ~ 4M*ParallelGCThreads 1039 if (FLAG_IS_DEFAULT(MaxNewSize)) { // MaxNewSize not set at command-line 1040 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1041 FLAG_SET_DEFAULT(MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1042 } else { 1043 FLAG_SET_DEFAULT(MaxNewSize, preferred_max_new_size); 1044 } 1045 } 1046 // Unless explicitly requested otherwise, prefer a large 1047 // Old to Young gen size so as to shift the collection load 1048 // to the old generation concurrent collector 1049 if (FLAG_IS_DEFAULT(NewRatio)) { 1050 FLAG_SET_DEFAULT(NewRatio, MAX2(NewRatio, new_ratio)); 1051 1052 size_t min_new = align_size_up(ScaleForWordSize(min_new_default), os::vm_page_size()); 1053 size_t prev_initial_size = initial_heap_size(); 1054 if (prev_initial_size != 0 && prev_initial_size < min_new+OldSize) { 1055 set_initial_heap_size(min_new+OldSize); 1056 // Currently minimum size and the initial heap sizes are the same. 1057 set_min_heap_size(initial_heap_size()); 1058 if (PrintGCDetails && Verbose) { 1059 warning("Initial heap size increased to " SIZE_FORMAT " M from " 1060 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", 1061 initial_heap_size()/M, prev_initial_size/M); 1062 } 1063 } 1064 // MaxHeapSize is aligned down in collectorPolicy 1065 size_t max_heap = align_size_down(MaxHeapSize, 1066 CardTableRS::ct_max_alignment_constraint()); 1067 1068 if (max_heap > min_new) { 1069 // Unless explicitly requested otherwise, make young gen 1070 // at least min_new, and at most preferred_max_new_size. 1071 if (FLAG_IS_DEFAULT(NewSize)) { 1072 FLAG_SET_DEFAULT(NewSize, MAX2(NewSize, min_new)); 1073 FLAG_SET_DEFAULT(NewSize, MIN2(preferred_max_new_size, NewSize)); 1074 } 1075 // Unless explicitly requested otherwise, size old gen 1076 // so that it's at least 3X of NewSize to begin with; 1077 // later NewRatio will decide how it grows; see above. 1078 if (FLAG_IS_DEFAULT(OldSize)) { 1079 if (max_heap > NewSize) { 1080 FLAG_SET_DEFAULT(OldSize, MIN2(3*NewSize, max_heap - NewSize)); 1081 } 1082 } 1083 } 1084 } 1085 // Unless explicitly requested otherwise, definitely 1086 // promote all objects surviving "tenuring_default" scavenges. 1087 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1088 FLAG_IS_DEFAULT(SurvivorRatio)) { 1089 FLAG_SET_DEFAULT(MaxTenuringThreshold, tenuring_default); 1090 } 1091 // If we decided above (or user explicitly requested) 1092 // `promote all' (via MaxTenuringThreshold := 0), 1093 // prefer minuscule survivor spaces so as not to waste 1094 // space for (non-existent) survivors 1095 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1096 FLAG_SET_DEFAULT(SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); 1097 } 1098 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, 1099 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. 1100 // This is done in order to make ParNew+CMS configuration to work 1101 // with YoungPLABSize and OldPLABSize options. 1102 // See CR 6362902. 1103 if (!FLAG_IS_DEFAULT(OldPLABSize)) { 1104 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1105 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); 1106 } 1107 else { 1108 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. 1109 // CMSParPromoteBlocksToClaim is a collector-specific flag, so 1110 // we'll let it to take precedence. 1111 jio_fprintf(defaultStream::error_stream(), 1112 "Both OldPLABSize and CMSParPromoteBlocksToClaim options are specified " 1113 "for the CMS collector. CMSParPromoteBlocksToClaim will take precedence.\n"); 1114 } 1115 } 1116} 1117 1118bool Arguments::should_auto_select_low_pause_collector() { 1119 if (UseAutoGCSelectPolicy && 1120 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1121 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1122 if (PrintGCDetails) { 1123 // Cannot use gclog_or_tty yet. 1124 tty->print_cr("Automatic selection of the low pause collector" 1125 " based on pause goal of %d (ms)", MaxGCPauseMillis); 1126 } 1127 return true; 1128 } 1129 return false; 1130} 1131 1132void Arguments::set_ergonomics_flags() { 1133 // Parallel GC is not compatible with sharing. If one specifies 1134 // that they want sharing explicitly, do not set ergonmics flags. 1135 if (DumpSharedSpaces || ForceSharedSpaces) { 1136 return; 1137 } 1138 1139 if (os::is_server_class_machine() && !force_client_mode ) { 1140 // If no other collector is requested explicitly, 1141 // let the VM select the collector based on 1142 // machine class and automatic selection policy. 1143 if (!UseSerialGC && 1144 !UseConcMarkSweepGC && 1145 !UseParNewGC && 1146 !DumpSharedSpaces && 1147 FLAG_IS_DEFAULT(UseParallelGC)) { 1148 if (should_auto_select_low_pause_collector()) { 1149 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1150 set_cms_and_parnew_gc_flags(); 1151 } else { 1152 FLAG_SET_ERGO(bool, UseParallelGC, true); 1153 } 1154 no_shared_spaces(); 1155 } 1156 1157 // This is here because the parallel collector could 1158 // have been selected so this initialization should 1159 // still be done. 1160 set_parallel_gc_flags(); 1161 } 1162} 1163 1164void Arguments::set_parallel_gc_flags() { 1165 // If parallel old was requested, automatically enable parallel scavenge. 1166 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { 1167 FLAG_SET_DEFAULT(UseParallelGC, true); 1168 } 1169 1170 // If no heap maximum was requested explicitly, use some reasonable fraction 1171 // of the physical memory, up to a maximum of 1GB. 1172 if (UseParallelGC) { 1173 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1174 const uint64_t reasonable_fraction = 1175 os::physical_memory() / DefaultMaxRAMFraction; 1176 const uint64_t maximum_size = (uint64_t) DefaultMaxRAM; 1177 size_t reasonable_max = 1178 (size_t) os::allocatable_physical_memory(reasonable_fraction); 1179 if (reasonable_max > maximum_size) { 1180 reasonable_max = maximum_size; 1181 } 1182 if (PrintGCDetails && Verbose) { 1183 // Cannot use gclog_or_tty yet. 1184 tty->print_cr(" Max heap size for server class platform " 1185 SIZE_FORMAT, reasonable_max); 1186 } 1187 // If the initial_heap_size has not been set with -Xms, 1188 // then set it as fraction of size of physical memory 1189 // respecting the maximum and minimum sizes of the heap. 1190 if (initial_heap_size() == 0) { 1191 const uint64_t reasonable_initial_fraction = 1192 os::physical_memory() / DefaultInitialRAMFraction; 1193 const size_t reasonable_initial = 1194 (size_t) os::allocatable_physical_memory(reasonable_initial_fraction); 1195 const size_t minimum_size = NewSize + OldSize; 1196 set_initial_heap_size(MAX2(MIN2(reasonable_initial, reasonable_max), 1197 minimum_size)); 1198 // Currently the minimum size and the initial heap sizes are the same. 1199 set_min_heap_size(initial_heap_size()); 1200 if (PrintGCDetails && Verbose) { 1201 // Cannot use gclog_or_tty yet. 1202 tty->print_cr(" Initial heap size for server class platform " 1203 SIZE_FORMAT, initial_heap_size()); 1204 } 1205 } else { 1206 // An minimum size was specified on the command line. Be sure 1207 // that the maximum size is consistent. 1208 if (initial_heap_size() > reasonable_max) { 1209 reasonable_max = initial_heap_size(); 1210 } 1211 } 1212 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx) reasonable_max); 1213 } 1214 1215 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1216 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1217 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1218 // See CR 6362902 for details. 1219 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1220 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1221 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1222 } 1223 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1224 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1225 } 1226 } 1227 1228 if (UseParallelOldGC) { 1229 // Par compact uses lower default values since they are treated as 1230 // minimums. 1231 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1232 MarkSweepDeadRatio = 1; 1233 } 1234 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { 1235 PermMarkSweepDeadRatio = 5; 1236 } 1237 } 1238 } 1239} 1240 1241// This must be called after ergonomics because we want bytecode rewriting 1242// if the server compiler is used, or if UseSharedSpaces is disabled. 1243void Arguments::set_bytecode_flags() { 1244 // Better not attempt to store into a read-only space. 1245 if (UseSharedSpaces) { 1246 FLAG_SET_DEFAULT(RewriteBytecodes, false); 1247 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1248 } 1249 1250 if (!RewriteBytecodes) { 1251 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1252 } 1253} 1254 1255// Aggressive optimization flags -XX:+AggressiveOpts 1256void Arguments::set_aggressive_opts_flags() { 1257 if (AggressiveOpts) { 1258NOT_WINDOWS( 1259 // No measured benefit on Windows 1260 if (FLAG_IS_DEFAULT(CacheTimeMillis)) { 1261 FLAG_SET_DEFAULT(CacheTimeMillis, true); 1262 } 1263) 1264 } 1265} 1266 1267//=========================================================================================================== 1268// Parsing of java.compiler property 1269 1270void Arguments::process_java_compiler_argument(char* arg) { 1271 // For backwards compatibility, Djava.compiler=NONE or "" 1272 // causes us to switch to -Xint mode UNLESS -Xdebug 1273 // is also specified. 1274 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1275 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1276 } 1277} 1278 1279void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 1280 _sun_java_launcher = strdup(launcher); 1281} 1282 1283bool Arguments::created_by_java_launcher() { 1284 assert(_sun_java_launcher != NULL, "property must have value"); 1285 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 1286} 1287 1288//=========================================================================================================== 1289// Parsing of main arguments 1290 1291bool Arguments::verify_percentage(uintx value, const char* name) { 1292 if (value <= 100) { 1293 return true; 1294 } 1295 jio_fprintf(defaultStream::error_stream(), 1296 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 1297 name, value); 1298 return false; 1299} 1300 1301static void set_serial_gc_flags() { 1302 FLAG_SET_DEFAULT(UseSerialGC, true); 1303 FLAG_SET_DEFAULT(UseParNewGC, false); 1304 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); 1305 FLAG_SET_DEFAULT(UseParallelGC, false); 1306 FLAG_SET_DEFAULT(UseParallelOldGC, false); 1307} 1308 1309static bool verify_serial_gc_flags() { 1310 return (UseSerialGC && 1311 !(UseParNewGC || UseConcMarkSweepGC || UseParallelGC || 1312 UseParallelOldGC)); 1313} 1314 1315// Check the consistency of vm_init_args 1316bool Arguments::check_vm_args_consistency() { 1317 // Method for adding checks for flag consistency. 1318 // The intent is to warn the user of all possible conflicts, 1319 // before returning an error. 1320 // Note: Needs platform-dependent factoring. 1321 bool status = true; 1322 1323#if ( (defined(COMPILER2) && defined(SPARC))) 1324 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init 1325 // on sparc doesn't require generation of a stub as is the case on, e.g., 1326 // x86. Normally, VM_Version_init must be called from init_globals in 1327 // init.cpp, which is called by the initial java thread *after* arguments 1328 // have been parsed. VM_Version_init gets called twice on sparc. 1329 extern void VM_Version_init(); 1330 VM_Version_init(); 1331 if (!VM_Version::has_v9()) { 1332 jio_fprintf(defaultStream::error_stream(), 1333 "V8 Machine detected, Server requires V9\n"); 1334 status = false; 1335 } 1336#endif /* COMPILER2 && SPARC */ 1337 1338 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product 1339 // builds so the cost of stack banging can be measured. 1340#if (defined(PRODUCT) && defined(SOLARIS)) 1341 if (!UseBoundThreads && !UseStackBanging) { 1342 jio_fprintf(defaultStream::error_stream(), 1343 "-UseStackBanging conflicts with -UseBoundThreads\n"); 1344 1345 status = false; 1346 } 1347#endif 1348 1349 if (TLABRefillWasteFraction == 0) { 1350 jio_fprintf(defaultStream::error_stream(), 1351 "TLABRefillWasteFraction should be a denominator, " 1352 "not " SIZE_FORMAT "\n", 1353 TLABRefillWasteFraction); 1354 status = false; 1355 } 1356 1357 status &= verify_percentage(MaxLiveObjectEvacuationRatio, 1358 "MaxLiveObjectEvacuationRatio"); 1359 status &= verify_percentage(AdaptiveSizePolicyWeight, 1360 "AdaptiveSizePolicyWeight"); 1361 status &= verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); 1362 status &= verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 1363 status &= verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); 1364 status &= verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); 1365 1366 if (MinHeapFreeRatio > MaxHeapFreeRatio) { 1367 jio_fprintf(defaultStream::error_stream(), 1368 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 1369 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", 1370 MinHeapFreeRatio, MaxHeapFreeRatio); 1371 status = false; 1372 } 1373 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1374 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); 1375 1376 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 1377 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 1378 } 1379 1380 status &= verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1381 status &= verify_percentage(GCTimeLimit, "GCTimeLimit"); 1382 if (GCTimeLimit == 100) { 1383 // Turn off gc-overhead-limit-exceeded checks 1384 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 1385 } 1386 1387 status &= verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1388 1389 // Check user specified sharing option conflict with Parallel GC 1390 bool cannot_share = (UseConcMarkSweepGC || UseParallelGC || 1391 UseParallelOldGC || UseParNewGC || 1392 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); 1393 1394 if (cannot_share) { 1395 // Either force sharing on by forcing the other options off, or 1396 // force sharing off. 1397 if (DumpSharedSpaces || ForceSharedSpaces) { 1398 set_serial_gc_flags(); 1399 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); 1400 } else { 1401 no_shared_spaces(); 1402 } 1403 } 1404 1405 // Ensure that the user has not selected conflicting sets 1406 // of collectors. [Note: this check is merely a user convenience; 1407 // collectors over-ride each other so that only a non-conflicting 1408 // set is selected; however what the user gets is not what they 1409 // may have expected from the combination they asked for. It's 1410 // better to reduce user confusion by not allowing them to 1411 // select conflicting combinations. 1412 uint i = 0; 1413 if (UseSerialGC) i++; 1414 if (UseConcMarkSweepGC || UseParNewGC) i++; 1415 if (UseParallelGC || UseParallelOldGC) i++; 1416 if (i > 1) { 1417 jio_fprintf(defaultStream::error_stream(), 1418 "Conflicting collector combinations in option list; " 1419 "please refer to the release notes for the combinations " 1420 "allowed\n"); 1421 status = false; 1422 } 1423 1424 if (_has_alloc_profile) { 1425 if (UseParallelGC || UseParallelOldGC) { 1426 jio_fprintf(defaultStream::error_stream(), 1427 "error: invalid argument combination.\n" 1428 "Allocation profiling (-Xaprof) cannot be used together with " 1429 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); 1430 status = false; 1431 } 1432 if (UseConcMarkSweepGC) { 1433 jio_fprintf(defaultStream::error_stream(), 1434 "error: invalid argument combination.\n" 1435 "Allocation profiling (-Xaprof) cannot be used together with " 1436 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); 1437 status = false; 1438 } 1439 } 1440 1441 if (CMSIncrementalMode) { 1442 if (!UseConcMarkSweepGC) { 1443 jio_fprintf(defaultStream::error_stream(), 1444 "error: invalid argument combination.\n" 1445 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 1446 "selected in order\nto use CMSIncrementalMode.\n"); 1447 status = false; 1448 } else if (!UseTLAB) { 1449 jio_fprintf(defaultStream::error_stream(), 1450 "error: CMSIncrementalMode requires thread-local " 1451 "allocation buffers\n(-XX:+UseTLAB).\n"); 1452 status = false; 1453 } else { 1454 status &= verify_percentage(CMSIncrementalDutyCycle, 1455 "CMSIncrementalDutyCycle"); 1456 status &= verify_percentage(CMSIncrementalDutyCycleMin, 1457 "CMSIncrementalDutyCycleMin"); 1458 status &= verify_percentage(CMSIncrementalSafetyFactor, 1459 "CMSIncrementalSafetyFactor"); 1460 status &= verify_percentage(CMSIncrementalOffset, 1461 "CMSIncrementalOffset"); 1462 status &= verify_percentage(CMSExpAvgFactor, 1463 "CMSExpAvgFactor"); 1464 // If it was not set on the command line, set 1465 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 1466 if (CMSInitiatingOccupancyFraction < 0) { 1467 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 1468 } 1469 } 1470 } 1471 1472 if (UseNUMA && !UseTLAB) { 1473 jio_fprintf(defaultStream::error_stream(), 1474 "error: NUMA allocator (-XX:+UseNUMA) requires thread-local " 1475 "allocation\nbuffers (-XX:+UseTLAB).\n"); 1476 status = false; 1477 } 1478 1479 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 1480 // insists that we hold the requisite locks so that the iteration is 1481 // MT-safe. For the verification at start-up and shut-down, we don't 1482 // yet have a good way of acquiring and releasing these locks, 1483 // which are not visible at the CollectedHeap level. We want to 1484 // be able to acquire these locks and then do the iteration rather 1485 // than just disable the lock verification. This will be fixed under 1486 // bug 4788986. 1487 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 1488 if (VerifyGCStartAt == 0) { 1489 warning("Heap verification at start-up disabled " 1490 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1491 VerifyGCStartAt = 1; // Disable verification at start-up 1492 } 1493 if (VerifyBeforeExit) { 1494 warning("Heap verification at shutdown disabled " 1495 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1496 VerifyBeforeExit = false; // Disable verification at shutdown 1497 } 1498 } 1499 1500 // Note: only executed in non-PRODUCT mode 1501 if (!UseAsyncConcMarkSweepGC && 1502 (ExplicitGCInvokesConcurrent || 1503 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 1504 jio_fprintf(defaultStream::error_stream(), 1505 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" 1506 " with -UseAsyncConcMarkSweepGC"); 1507 status = false; 1508 } 1509 1510 return status; 1511} 1512 1513bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 1514 const char* option_type) { 1515 if (ignore) return false; 1516 1517 const char* spacer = " "; 1518 if (option_type == NULL) { 1519 option_type = ++spacer; // Set both to the empty string. 1520 } 1521 1522 if (os::obsolete_option(option)) { 1523 jio_fprintf(defaultStream::error_stream(), 1524 "Obsolete %s%soption: %s\n", option_type, spacer, 1525 option->optionString); 1526 return false; 1527 } else { 1528 jio_fprintf(defaultStream::error_stream(), 1529 "Unrecognized %s%soption: %s\n", option_type, spacer, 1530 option->optionString); 1531 return true; 1532 } 1533} 1534 1535static const char* user_assertion_options[] = { 1536 "-da", "-ea", "-disableassertions", "-enableassertions", 0 1537}; 1538 1539static const char* system_assertion_options[] = { 1540 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 1541}; 1542 1543// Return true if any of the strings in null-terminated array 'names' matches. 1544// If tail_allowed is true, then the tail must begin with a colon; otherwise, 1545// the option must match exactly. 1546static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 1547 bool tail_allowed) { 1548 for (/* empty */; *names != NULL; ++names) { 1549 if (match_option(option, *names, tail)) { 1550 if (**tail == '\0' || tail_allowed && **tail == ':') { 1551 return true; 1552 } 1553 } 1554 } 1555 return false; 1556} 1557 1558Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 1559 jlong* long_arg, 1560 jlong min_size) { 1561 if (!atomll(s, long_arg)) return arg_unreadable; 1562 return check_memory_size(*long_arg, min_size); 1563} 1564 1565// Parse JavaVMInitArgs structure 1566 1567jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 1568 // For components of the system classpath. 1569 SysClassPath scp(Arguments::get_sysclasspath()); 1570 bool scp_assembly_required = false; 1571 1572 // Save default settings for some mode flags 1573 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 1574 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 1575 Arguments::_ClipInlining = ClipInlining; 1576 Arguments::_BackgroundCompilation = BackgroundCompilation; 1577 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 1578 1579 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 1580 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 1581 if (result != JNI_OK) { 1582 return result; 1583 } 1584 1585 // Parse JavaVMInitArgs structure passed in 1586 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); 1587 if (result != JNI_OK) { 1588 return result; 1589 } 1590 1591 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 1592 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 1593 if (result != JNI_OK) { 1594 return result; 1595 } 1596 1597 // Do final processing now that all arguments have been parsed 1598 result = finalize_vm_init_args(&scp, scp_assembly_required); 1599 if (result != JNI_OK) { 1600 return result; 1601 } 1602 1603 return JNI_OK; 1604} 1605 1606 1607jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 1608 SysClassPath* scp_p, 1609 bool* scp_assembly_required_p, 1610 FlagValueOrigin origin) { 1611 // Remaining part of option string 1612 const char* tail; 1613 1614 // iterate over arguments 1615 for (int index = 0; index < args->nOptions; index++) { 1616 bool is_absolute_path = false; // for -agentpath vs -agentlib 1617 1618 const JavaVMOption* option = args->options + index; 1619 1620 if (!match_option(option, "-Djava.class.path", &tail) && 1621 !match_option(option, "-Dsun.java.command", &tail) && 1622 !match_option(option, "-Dsun.java.launcher", &tail)) { 1623 1624 // add all jvm options to the jvm_args string. This string 1625 // is used later to set the java.vm.args PerfData string constant. 1626 // the -Djava.class.path and the -Dsun.java.command options are 1627 // omitted from jvm_args string as each have their own PerfData 1628 // string constant object. 1629 build_jvm_args(option->optionString); 1630 } 1631 1632 // -verbose:[class/gc/jni] 1633 if (match_option(option, "-verbose", &tail)) { 1634 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 1635 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 1636 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1637 } else if (!strcmp(tail, ":gc")) { 1638 FLAG_SET_CMDLINE(bool, PrintGC, true); 1639 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1640 } else if (!strcmp(tail, ":jni")) { 1641 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 1642 } 1643 // -da / -ea / -disableassertions / -enableassertions 1644 // These accept an optional class/package name separated by a colon, e.g., 1645 // -da:java.lang.Thread. 1646 } else if (match_option(option, user_assertion_options, &tail, true)) { 1647 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1648 if (*tail == '\0') { 1649 JavaAssertions::setUserClassDefault(enable); 1650 } else { 1651 assert(*tail == ':', "bogus match by match_option()"); 1652 JavaAssertions::addOption(tail + 1, enable); 1653 } 1654 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 1655 } else if (match_option(option, system_assertion_options, &tail, false)) { 1656 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1657 JavaAssertions::setSystemClassDefault(enable); 1658 // -bootclasspath: 1659 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 1660 scp_p->reset_path(tail); 1661 *scp_assembly_required_p = true; 1662 // -bootclasspath/a: 1663 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 1664 scp_p->add_suffix(tail); 1665 *scp_assembly_required_p = true; 1666 // -bootclasspath/p: 1667 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 1668 scp_p->add_prefix(tail); 1669 *scp_assembly_required_p = true; 1670 // -Xrun 1671 } else if (match_option(option, "-Xrun", &tail)) { 1672 if(tail != NULL) { 1673 const char* pos = strchr(tail, ':'); 1674 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1675 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1676 name[len] = '\0'; 1677 1678 char *options = NULL; 1679 if(pos != NULL) { 1680 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 1681 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); 1682 } 1683#ifdef JVMTI_KERNEL 1684 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1685 warning("profiling and debugging agents are not supported with Kernel VM"); 1686 } else 1687#endif // JVMTI_KERNEL 1688 add_init_library(name, options); 1689 } 1690 // -agentlib and -agentpath 1691 } else if (match_option(option, "-agentlib:", &tail) || 1692 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 1693 if(tail != NULL) { 1694 const char* pos = strchr(tail, '='); 1695 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1696 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1697 name[len] = '\0'; 1698 1699 char *options = NULL; 1700 if(pos != NULL) { 1701 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); 1702 } 1703#ifdef JVMTI_KERNEL 1704 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1705 warning("profiling and debugging agents are not supported with Kernel VM"); 1706 } else 1707#endif // JVMTI_KERNEL 1708 add_init_agent(name, options, is_absolute_path); 1709 1710 } 1711 // -javaagent 1712 } else if (match_option(option, "-javaagent:", &tail)) { 1713 if(tail != NULL) { 1714 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); 1715 add_init_agent("instrument", options, false); 1716 } 1717 // -Xnoclassgc 1718 } else if (match_option(option, "-Xnoclassgc", &tail)) { 1719 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 1720 // -Xincgc: i-CMS 1721 } else if (match_option(option, "-Xincgc", &tail)) { 1722 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1723 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 1724 // -Xnoincgc: no i-CMS 1725 } else if (match_option(option, "-Xnoincgc", &tail)) { 1726 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1727 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 1728 // -Xconcgc 1729 } else if (match_option(option, "-Xconcgc", &tail)) { 1730 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1731 // -Xnoconcgc 1732 } else if (match_option(option, "-Xnoconcgc", &tail)) { 1733 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1734 // -Xbatch 1735 } else if (match_option(option, "-Xbatch", &tail)) { 1736 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1737 // -Xmn for compatibility with other JVM vendors 1738 } else if (match_option(option, "-Xmn", &tail)) { 1739 jlong long_initial_eden_size = 0; 1740 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); 1741 if (errcode != arg_in_range) { 1742 jio_fprintf(defaultStream::error_stream(), 1743 "Invalid initial eden size: %s\n", option->optionString); 1744 describe_range_error(errcode); 1745 return JNI_EINVAL; 1746 } 1747 FLAG_SET_CMDLINE(uintx, MaxNewSize, (size_t) long_initial_eden_size); 1748 FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size); 1749 // -Xms 1750 } else if (match_option(option, "-Xms", &tail)) { 1751 jlong long_initial_heap_size = 0; 1752 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); 1753 if (errcode != arg_in_range) { 1754 jio_fprintf(defaultStream::error_stream(), 1755 "Invalid initial heap size: %s\n", option->optionString); 1756 describe_range_error(errcode); 1757 return JNI_EINVAL; 1758 } 1759 set_initial_heap_size((size_t) long_initial_heap_size); 1760 // Currently the minimum size and the initial heap sizes are the same. 1761 set_min_heap_size(initial_heap_size()); 1762 // -Xmx 1763 } else if (match_option(option, "-Xmx", &tail)) { 1764 jlong long_max_heap_size = 0; 1765 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 1766 if (errcode != arg_in_range) { 1767 jio_fprintf(defaultStream::error_stream(), 1768 "Invalid maximum heap size: %s\n", option->optionString); 1769 describe_range_error(errcode); 1770 return JNI_EINVAL; 1771 } 1772 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (size_t) long_max_heap_size); 1773 // Xmaxf 1774 } else if (match_option(option, "-Xmaxf", &tail)) { 1775 int maxf = (int)(atof(tail) * 100); 1776 if (maxf < 0 || maxf > 100) { 1777 jio_fprintf(defaultStream::error_stream(), 1778 "Bad max heap free percentage size: %s\n", 1779 option->optionString); 1780 return JNI_EINVAL; 1781 } else { 1782 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 1783 } 1784 // Xminf 1785 } else if (match_option(option, "-Xminf", &tail)) { 1786 int minf = (int)(atof(tail) * 100); 1787 if (minf < 0 || minf > 100) { 1788 jio_fprintf(defaultStream::error_stream(), 1789 "Bad min heap free percentage size: %s\n", 1790 option->optionString); 1791 return JNI_EINVAL; 1792 } else { 1793 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 1794 } 1795 // -Xss 1796 } else if (match_option(option, "-Xss", &tail)) { 1797 jlong long_ThreadStackSize = 0; 1798 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 1799 if (errcode != arg_in_range) { 1800 jio_fprintf(defaultStream::error_stream(), 1801 "Invalid thread stack size: %s\n", option->optionString); 1802 describe_range_error(errcode); 1803 return JNI_EINVAL; 1804 } 1805 // Internally track ThreadStackSize in units of 1024 bytes. 1806 FLAG_SET_CMDLINE(intx, ThreadStackSize, 1807 round_to((int)long_ThreadStackSize, K) / K); 1808 // -Xoss 1809 } else if (match_option(option, "-Xoss", &tail)) { 1810 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 1811 // -Xmaxjitcodesize 1812 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { 1813 jlong long_ReservedCodeCacheSize = 0; 1814 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1815 InitialCodeCacheSize); 1816 if (errcode != arg_in_range) { 1817 jio_fprintf(defaultStream::error_stream(), 1818 "Invalid maximum code cache size: %s\n", 1819 option->optionString); 1820 describe_range_error(errcode); 1821 return JNI_EINVAL; 1822 } 1823 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 1824 // -green 1825 } else if (match_option(option, "-green", &tail)) { 1826 jio_fprintf(defaultStream::error_stream(), 1827 "Green threads support not available\n"); 1828 return JNI_EINVAL; 1829 // -native 1830 } else if (match_option(option, "-native", &tail)) { 1831 // HotSpot always uses native threads, ignore silently for compatibility 1832 // -Xsqnopause 1833 } else if (match_option(option, "-Xsqnopause", &tail)) { 1834 // EVM option, ignore silently for compatibility 1835 // -Xrs 1836 } else if (match_option(option, "-Xrs", &tail)) { 1837 // Classic/EVM option, new functionality 1838 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 1839 } else if (match_option(option, "-Xusealtsigs", &tail)) { 1840 // change default internal VM signals used - lower case for back compat 1841 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 1842 // -Xoptimize 1843 } else if (match_option(option, "-Xoptimize", &tail)) { 1844 // EVM option, ignore silently for compatibility 1845 // -Xprof 1846 } else if (match_option(option, "-Xprof", &tail)) { 1847#ifndef FPROF_KERNEL 1848 _has_profile = true; 1849#else // FPROF_KERNEL 1850 // do we have to exit? 1851 warning("Kernel VM does not support flat profiling."); 1852#endif // FPROF_KERNEL 1853 // -Xaprof 1854 } else if (match_option(option, "-Xaprof", &tail)) { 1855 _has_alloc_profile = true; 1856 // -Xconcurrentio 1857 } else if (match_option(option, "-Xconcurrentio", &tail)) { 1858 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 1859 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1860 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 1861 FLAG_SET_CMDLINE(bool, UseTLAB, false); 1862 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 1863 1864 // -Xinternalversion 1865 } else if (match_option(option, "-Xinternalversion", &tail)) { 1866 jio_fprintf(defaultStream::output_stream(), "%s\n", 1867 VM_Version::internal_vm_info_string()); 1868 vm_exit(0); 1869#ifndef PRODUCT 1870 // -Xprintflags 1871 } else if (match_option(option, "-Xprintflags", &tail)) { 1872 CommandLineFlags::printFlags(); 1873 vm_exit(0); 1874#endif 1875 // -D 1876 } else if (match_option(option, "-D", &tail)) { 1877 if (!add_property(tail)) { 1878 return JNI_ENOMEM; 1879 } 1880 // Out of the box management support 1881 if (match_option(option, "-Dcom.sun.management", &tail)) { 1882 FLAG_SET_CMDLINE(bool, ManagementServer, true); 1883 } 1884 // -Xint 1885 } else if (match_option(option, "-Xint", &tail)) { 1886 set_mode_flags(_int); 1887 // -Xmixed 1888 } else if (match_option(option, "-Xmixed", &tail)) { 1889 set_mode_flags(_mixed); 1890 // -Xcomp 1891 } else if (match_option(option, "-Xcomp", &tail)) { 1892 // for testing the compiler; turn off all flags that inhibit compilation 1893 set_mode_flags(_comp); 1894 1895 // -Xshare:dump 1896 } else if (match_option(option, "-Xshare:dump", &tail)) { 1897#ifdef TIERED 1898 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1899 set_mode_flags(_int); // Prevent compilation, which creates objects 1900#elif defined(COMPILER2) 1901 vm_exit_during_initialization( 1902 "Dumping a shared archive is not supported on the Server JVM.", NULL); 1903#elif defined(KERNEL) 1904 vm_exit_during_initialization( 1905 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); 1906#else 1907 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1908 set_mode_flags(_int); // Prevent compilation, which creates objects 1909#endif 1910 // -Xshare:on 1911 } else if (match_option(option, "-Xshare:on", &tail)) { 1912 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1913 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 1914#ifdef TIERED 1915 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); 1916#endif // TIERED 1917 // -Xshare:auto 1918 } else if (match_option(option, "-Xshare:auto", &tail)) { 1919 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1920 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 1921 // -Xshare:off 1922 } else if (match_option(option, "-Xshare:off", &tail)) { 1923 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 1924 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 1925 1926 // -Xverify 1927 } else if (match_option(option, "-Xverify", &tail)) { 1928 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 1929 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 1930 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 1931 } else if (strcmp(tail, ":remote") == 0) { 1932 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 1933 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 1934 } else if (strcmp(tail, ":none") == 0) { 1935 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 1936 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 1937 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 1938 return JNI_EINVAL; 1939 } 1940 // -Xdebug 1941 } else if (match_option(option, "-Xdebug", &tail)) { 1942 // note this flag has been used, then ignore 1943 set_xdebug_mode(true); 1944 // -Xnoagent 1945 } else if (match_option(option, "-Xnoagent", &tail)) { 1946 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 1947 } else if (match_option(option, "-Xboundthreads", &tail)) { 1948 // Bind user level threads to kernel threads (Solaris only) 1949 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 1950 } else if (match_option(option, "-Xloggc:", &tail)) { 1951 // Redirect GC output to the file. -Xloggc:<filename> 1952 // ostream_init_log(), when called will use this filename 1953 // to initialize a fileStream. 1954 _gc_log_filename = strdup(tail); 1955 FLAG_SET_CMDLINE(bool, PrintGC, true); 1956 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 1957 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1958 1959 // JNI hooks 1960 } else if (match_option(option, "-Xcheck", &tail)) { 1961 if (!strcmp(tail, ":jni")) { 1962 CheckJNICalls = true; 1963 } else if (is_bad_option(option, args->ignoreUnrecognized, 1964 "check")) { 1965 return JNI_EINVAL; 1966 } 1967 } else if (match_option(option, "vfprintf", &tail)) { 1968 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 1969 } else if (match_option(option, "exit", &tail)) { 1970 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 1971 } else if (match_option(option, "abort", &tail)) { 1972 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 1973 // -XX:+AggressiveHeap 1974 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 1975 1976 // This option inspects the machine and attempts to set various 1977 // parameters to be optimal for long-running, memory allocation 1978 // intensive jobs. It is intended for machines with large 1979 // amounts of cpu and memory. 1980 1981 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 1982 // VM, but we may not be able to represent the total physical memory 1983 // available (like having 8gb of memory on a box but using a 32bit VM). 1984 // Thus, we need to make sure we're using a julong for intermediate 1985 // calculations. 1986 julong initHeapSize; 1987 julong total_memory = os::physical_memory(); 1988 1989 if (total_memory < (julong)256*M) { 1990 jio_fprintf(defaultStream::error_stream(), 1991 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 1992 vm_exit(1); 1993 } 1994 1995 // The heap size is half of available memory, or (at most) 1996 // all of possible memory less 160mb (leaving room for the OS 1997 // when using ISM). This is the maximum; because adaptive sizing 1998 // is turned on below, the actual space used may be smaller. 1999 2000 initHeapSize = MIN2(total_memory / (julong)2, 2001 total_memory - (julong)160*M); 2002 2003 // Make sure that if we have a lot of memory we cap the 32 bit 2004 // process space. The 64bit VM version of this function is a nop. 2005 initHeapSize = os::allocatable_physical_memory(initHeapSize); 2006 2007 // The perm gen is separate but contiguous with the 2008 // object heap (and is reserved with it) so subtract it 2009 // from the heap size. 2010 if (initHeapSize > MaxPermSize) { 2011 initHeapSize = initHeapSize - MaxPermSize; 2012 } else { 2013 warning("AggressiveHeap and MaxPermSize values may conflict"); 2014 } 2015 2016 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2017 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 2018 set_initial_heap_size(MaxHeapSize); 2019 // Currently the minimum size and the initial heap sizes are the same. 2020 set_min_heap_size(initial_heap_size()); 2021 } 2022 if (FLAG_IS_DEFAULT(NewSize)) { 2023 // Make the young generation 3/8ths of the total heap. 2024 FLAG_SET_CMDLINE(uintx, NewSize, 2025 ((julong)MaxHeapSize / (julong)8) * (julong)3); 2026 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 2027 } 2028 2029 FLAG_SET_DEFAULT(UseLargePages, true); 2030 2031 // Increase some data structure sizes for efficiency 2032 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 2033 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2034 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 2035 2036 // See the OldPLABSize comment below, but replace 'after promotion' 2037 // with 'after copying'. YoungPLABSize is the size of the survivor 2038 // space per-gc-thread buffers. The default is 4kw. 2039 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 2040 2041 // OldPLABSize is the size of the buffers in the old gen that 2042 // UseParallelGC uses to promote live data that doesn't fit in the 2043 // survivor spaces. At any given time, there's one for each gc thread. 2044 // The default size is 1kw. These buffers are rarely used, since the 2045 // survivor spaces are usually big enough. For specjbb, however, there 2046 // are occasions when there's lots of live data in the young gen 2047 // and we end up promoting some of it. We don't have a definite 2048 // explanation for why bumping OldPLABSize helps, but the theory 2049 // is that a bigger PLAB results in retaining something like the 2050 // original allocation order after promotion, which improves mutator 2051 // locality. A minor effect may be that larger PLABs reduce the 2052 // number of PLAB allocation events during gc. The value of 8kw 2053 // was arrived at by experimenting with specjbb. 2054 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 2055 2056 // CompilationPolicyChoice=0 causes the server compiler to adopt 2057 // a more conservative which-method-do-I-compile policy when one 2058 // of the counters maintained by the interpreter trips. The 2059 // result is reduced startup time and improved specjbb and 2060 // alacrity performance. Zero is the default, but we set it 2061 // explicitly here in case the default changes. 2062 // See runtime/compilationPolicy.*. 2063 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); 2064 2065 // Enable parallel GC and adaptive generation sizing 2066 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 2067 FLAG_SET_DEFAULT(ParallelGCThreads, nof_parallel_gc_threads()); 2068 2069 // Encourage steady state memory management 2070 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 2071 2072 // This appears to improve mutator locality 2073 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2074 2075 // Get around early Solaris scheduling bug 2076 // (affinity vs other jobs on system) 2077 // but disallow DR and offlining (5008695). 2078 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 2079 2080 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 2081 // The last option must always win. 2082 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 2083 FLAG_SET_CMDLINE(bool, NeverTenure, true); 2084 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 2085 // The last option must always win. 2086 FLAG_SET_CMDLINE(bool, NeverTenure, false); 2087 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 2088 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 2089 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 2090 jio_fprintf(defaultStream::error_stream(), 2091 "Please use CMSClassUnloadingEnabled in place of " 2092 "CMSPermGenSweepingEnabled in the future\n"); 2093 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 2094 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 2095 jio_fprintf(defaultStream::error_stream(), 2096 "Please use -XX:+UseGCOverheadLimit in place of " 2097 "-XX:+UseGCTimeLimit in the future\n"); 2098 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 2099 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 2100 jio_fprintf(defaultStream::error_stream(), 2101 "Please use -XX:-UseGCOverheadLimit in place of " 2102 "-XX:-UseGCTimeLimit in the future\n"); 2103 // The TLE options are for compatibility with 1.3 and will be 2104 // removed without notice in a future release. These options 2105 // are not to be documented. 2106 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 2107 // No longer used. 2108 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 2109 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 2110 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 2111 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2112 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 2113 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 2114 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 2115 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 2116 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 2117 // No longer used. 2118 } else if (match_option(option, "-XX:TLESize=", &tail)) { 2119 jlong long_tlab_size = 0; 2120 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 2121 if (errcode != arg_in_range) { 2122 jio_fprintf(defaultStream::error_stream(), 2123 "Invalid TLAB size: %s\n", option->optionString); 2124 describe_range_error(errcode); 2125 return JNI_EINVAL; 2126 } 2127 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 2128 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 2129 // No longer used. 2130 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 2131 FLAG_SET_CMDLINE(bool, UseTLAB, true); 2132 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 2133 FLAG_SET_CMDLINE(bool, UseTLAB, false); 2134SOLARIS_ONLY( 2135 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { 2136 warning("-XX:+UsePermISM is obsolete."); 2137 FLAG_SET_CMDLINE(bool, UseISM, true); 2138 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { 2139 FLAG_SET_CMDLINE(bool, UseISM, false); 2140) 2141 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 2142 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 2143 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 2144 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 2145 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 2146 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 2147 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 2148#ifdef SOLARIS 2149 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 2150 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 2151 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 2152 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 2153#else // ndef SOLARIS 2154 jio_fprintf(defaultStream::error_stream(), 2155 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); 2156 return JNI_EINVAL; 2157#endif // ndef SOLARIS 2158 } else 2159#ifdef ASSERT 2160 if (match_option(option, "-XX:+FullGCALot", &tail)) { 2161 FLAG_SET_CMDLINE(bool, FullGCALot, true); 2162 // disable scavenge before parallel mark-compact 2163 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2164 } else 2165#endif 2166 if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 2167 julong cms_blocks_to_claim = (julong)atol(tail); 2168 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 2169 jio_fprintf(defaultStream::error_stream(), 2170 "Please use -XX:CMSParPromoteBlocksToClaim in place of " 2171 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 2172 } else 2173 if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 2174 jlong old_plab_size = 0; 2175 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 2176 if (errcode != arg_in_range) { 2177 jio_fprintf(defaultStream::error_stream(), 2178 "Invalid old PLAB size: %s\n", option->optionString); 2179 describe_range_error(errcode); 2180 return JNI_EINVAL; 2181 } 2182 FLAG_SET_CMDLINE(uintx, OldPLABSize, (julong)old_plab_size); 2183 jio_fprintf(defaultStream::error_stream(), 2184 "Please use -XX:OldPLABSize in place of " 2185 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 2186 } else 2187 if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 2188 jlong young_plab_size = 0; 2189 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 2190 if (errcode != arg_in_range) { 2191 jio_fprintf(defaultStream::error_stream(), 2192 "Invalid young PLAB size: %s\n", option->optionString); 2193 describe_range_error(errcode); 2194 return JNI_EINVAL; 2195 } 2196 FLAG_SET_CMDLINE(uintx, YoungPLABSize, (julong)young_plab_size); 2197 jio_fprintf(defaultStream::error_stream(), 2198 "Please use -XX:YoungPLABSize in place of " 2199 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 2200 } else 2201 if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 2202 // Skip -XX:Flags= since that case has already been handled 2203 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 2204 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 2205 return JNI_EINVAL; 2206 } 2207 } 2208 // Unknown option 2209 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 2210 return JNI_ERR; 2211 } 2212 } 2213 2214 return JNI_OK; 2215} 2216 2217jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 2218 // This must be done after all -D arguments have been processed. 2219 scp_p->expand_endorsed(); 2220 2221 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { 2222 // Assemble the bootclasspath elements into the final path. 2223 Arguments::set_sysclasspath(scp_p->combined_path()); 2224 } 2225 2226 // This must be done after all arguments have been processed. 2227 // java_compiler() true means set to "NONE" or empty. 2228 if (java_compiler() && !xdebug_mode()) { 2229 // For backwards compatibility, we switch to interpreted mode if 2230 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 2231 // not specified. 2232 set_mode_flags(_int); 2233 } 2234 if (CompileThreshold == 0) { 2235 set_mode_flags(_int); 2236 } 2237 2238#ifdef TIERED 2239 // If we are using tiered compilation in the tiered vm then c1 will 2240 // do the profiling and we don't want to waste that time in the 2241 // interpreter. 2242 if (TieredCompilation) { 2243 ProfileInterpreter = false; 2244 } else { 2245 // Since we are running vanilla server we must adjust the compile threshold 2246 // unless the user has already adjusted it because the default threshold assumes 2247 // we will run tiered. 2248 2249 if (FLAG_IS_DEFAULT(CompileThreshold)) { 2250 CompileThreshold = Tier2CompileThreshold; 2251 } 2252 } 2253#endif // TIERED 2254 2255#ifndef COMPILER2 2256 // Don't degrade server performance for footprint 2257 if (FLAG_IS_DEFAULT(UseLargePages) && 2258 MaxHeapSize < LargePageHeapSizeThreshold) { 2259 // No need for large granularity pages w/small heaps. 2260 // Note that large pages are enabled/disabled for both the 2261 // Java heap and the code cache. 2262 FLAG_SET_DEFAULT(UseLargePages, false); 2263 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); 2264 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); 2265 } 2266#else 2267 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 2268 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 2269 } 2270#endif 2271 2272 if (!check_vm_args_consistency()) { 2273 return JNI_ERR; 2274 } 2275 2276 return JNI_OK; 2277} 2278 2279jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2280 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 2281 scp_assembly_required_p); 2282} 2283 2284jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2285 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 2286 scp_assembly_required_p); 2287} 2288 2289jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 2290 const int N_MAX_OPTIONS = 64; 2291 const int OPTION_BUFFER_SIZE = 1024; 2292 char buffer[OPTION_BUFFER_SIZE]; 2293 2294 // The variable will be ignored if it exceeds the length of the buffer. 2295 // Don't check this variable if user has special privileges 2296 // (e.g. unix su command). 2297 if (os::getenv(name, buffer, sizeof(buffer)) && 2298 !os::have_special_privileges()) { 2299 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 2300 jio_fprintf(defaultStream::error_stream(), 2301 "Picked up %s: %s\n", name, buffer); 2302 char* rd = buffer; // pointer to the input string (rd) 2303 int i; 2304 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 2305 while (isspace(*rd)) rd++; // skip whitespace 2306 if (*rd == 0) break; // we re done when the input string is read completely 2307 2308 // The output, option string, overwrites the input string. 2309 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 2310 // input string (rd). 2311 char* wrt = rd; 2312 2313 options[i++].optionString = wrt; // Fill in option 2314 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 2315 if (*rd == '\'' || *rd == '"') { // handle a quoted string 2316 int quote = *rd; // matching quote to look for 2317 rd++; // don't copy open quote 2318 while (*rd != quote) { // include everything (even spaces) up until quote 2319 if (*rd == 0) { // string termination means unmatched string 2320 jio_fprintf(defaultStream::error_stream(), 2321 "Unmatched quote in %s\n", name); 2322 return JNI_ERR; 2323 } 2324 *wrt++ = *rd++; // copy to option string 2325 } 2326 rd++; // don't copy close quote 2327 } else { 2328 *wrt++ = *rd++; // copy to option string 2329 } 2330 } 2331 // Need to check if we're done before writing a NULL, 2332 // because the write could be to the byte that rd is pointing to. 2333 if (*rd++ == 0) { 2334 *wrt = 0; 2335 break; 2336 } 2337 *wrt = 0; // Zero terminate option 2338 } 2339 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 2340 JavaVMInitArgs vm_args; 2341 vm_args.version = JNI_VERSION_1_2; 2342 vm_args.options = options; 2343 vm_args.nOptions = i; 2344 vm_args.ignoreUnrecognized = false; 2345 2346 if (PrintVMOptions) { 2347 const char* tail; 2348 for (int i = 0; i < vm_args.nOptions; i++) { 2349 const JavaVMOption *option = vm_args.options + i; 2350 if (match_option(option, "-XX:", &tail)) { 2351 logOption(tail); 2352 } 2353 } 2354 } 2355 2356 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); 2357 } 2358 return JNI_OK; 2359} 2360 2361// Parse entry point called from JNI_CreateJavaVM 2362 2363jint Arguments::parse(const JavaVMInitArgs* args) { 2364 2365 // Sharing support 2366 // Construct the path to the archive 2367 char jvm_path[JVM_MAXPATHLEN]; 2368 os::jvm_path(jvm_path, sizeof(jvm_path)); 2369#ifdef TIERED 2370 if (strstr(jvm_path, "client") != NULL) { 2371 force_client_mode = true; 2372 } 2373#endif // TIERED 2374 char *end = strrchr(jvm_path, *os::file_separator()); 2375 if (end != NULL) *end = '\0'; 2376 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + 2377 strlen(os::file_separator()) + 20); 2378 if (shared_archive_path == NULL) return JNI_ENOMEM; 2379 strcpy(shared_archive_path, jvm_path); 2380 strcat(shared_archive_path, os::file_separator()); 2381 strcat(shared_archive_path, "classes"); 2382 DEBUG_ONLY(strcat(shared_archive_path, "_g");) 2383 strcat(shared_archive_path, ".jsa"); 2384 SharedArchivePath = shared_archive_path; 2385 2386 // Remaining part of option string 2387 const char* tail; 2388 2389 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 2390 bool settings_file_specified = false; 2391 int index; 2392 for (index = 0; index < args->nOptions; index++) { 2393 const JavaVMOption *option = args->options + index; 2394 if (match_option(option, "-XX:Flags=", &tail)) { 2395 if (!process_settings_file(tail, true, args->ignoreUnrecognized)) { 2396 return JNI_EINVAL; 2397 } 2398 settings_file_specified = true; 2399 } 2400 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 2401 PrintVMOptions = true; 2402 } 2403 } 2404 2405 // Parse default .hotspotrc settings file 2406 if (!settings_file_specified) { 2407 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 2408 return JNI_EINVAL; 2409 } 2410 } 2411 2412 if (PrintVMOptions) { 2413 for (index = 0; index < args->nOptions; index++) { 2414 const JavaVMOption *option = args->options + index; 2415 if (match_option(option, "-XX:", &tail)) { 2416 logOption(tail); 2417 } 2418 } 2419 } 2420 2421 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 2422 jint result = parse_vm_init_args(args); 2423 if (result != JNI_OK) { 2424 return result; 2425 } 2426 2427#ifndef PRODUCT 2428 if (TraceBytecodesAt != 0) { 2429 TraceBytecodes = true; 2430 } 2431 if (CountCompiledCalls) { 2432 if (UseCounterDecay) { 2433 warning("UseCounterDecay disabled because CountCalls is set"); 2434 UseCounterDecay = false; 2435 } 2436 } 2437#endif // PRODUCT 2438 2439 if (PrintGCDetails) { 2440 // Turn on -verbose:gc options as well 2441 PrintGC = true; 2442 if (FLAG_IS_DEFAULT(TraceClassUnloading)) { 2443 TraceClassUnloading = true; 2444 } 2445 } 2446 2447#ifdef SERIALGC 2448 set_serial_gc_flags(); 2449#endif // SERIALGC 2450#ifdef KERNEL 2451 no_shared_spaces(); 2452#endif // KERNEL 2453 2454 // Set some flags for ParallelGC if needed. 2455 set_parallel_gc_flags(); 2456 2457 // Set some flags for CMS and/or ParNew collectors, as needed. 2458 set_cms_and_parnew_gc_flags(); 2459 2460 // Set flags based on ergonomics. 2461 set_ergonomics_flags(); 2462 2463#ifdef SERIALGC 2464 assert(verify_serial_gc_flags(), "SerialGC unset"); 2465#endif // SERIALGC 2466 2467 // Set bytecode rewriting flags 2468 set_bytecode_flags(); 2469 2470 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. 2471 set_aggressive_opts_flags(); 2472 2473#ifdef CC_INTERP 2474 // Biased locking is not implemented with c++ interpreter 2475 FLAG_SET_DEFAULT(UseBiasedLocking, false); 2476#endif /* CC_INTERP */ 2477 2478 if (PrintCommandLineFlags) { 2479 CommandLineFlags::printSetFlags(); 2480 } 2481 2482 return JNI_OK; 2483} 2484 2485int Arguments::PropertyList_count(SystemProperty* pl) { 2486 int count = 0; 2487 while(pl != NULL) { 2488 count++; 2489 pl = pl->next(); 2490 } 2491 return count; 2492} 2493 2494const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 2495 assert(key != NULL, "just checking"); 2496 SystemProperty* prop; 2497 for (prop = pl; prop != NULL; prop = prop->next()) { 2498 if (strcmp(key, prop->key()) == 0) return prop->value(); 2499 } 2500 return NULL; 2501} 2502 2503const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 2504 int count = 0; 2505 const char* ret_val = NULL; 2506 2507 while(pl != NULL) { 2508 if(count >= index) { 2509 ret_val = pl->key(); 2510 break; 2511 } 2512 count++; 2513 pl = pl->next(); 2514 } 2515 2516 return ret_val; 2517} 2518 2519char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 2520 int count = 0; 2521 char* ret_val = NULL; 2522 2523 while(pl != NULL) { 2524 if(count >= index) { 2525 ret_val = pl->value(); 2526 break; 2527 } 2528 count++; 2529 pl = pl->next(); 2530 } 2531 2532 return ret_val; 2533} 2534 2535void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 2536 SystemProperty* p = *plist; 2537 if (p == NULL) { 2538 *plist = new_p; 2539 } else { 2540 while (p->next() != NULL) { 2541 p = p->next(); 2542 } 2543 p->set_next(new_p); 2544 } 2545} 2546 2547void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 2548 if (plist == NULL) 2549 return; 2550 2551 SystemProperty* new_p = new SystemProperty(k, v, true); 2552 PropertyList_add(plist, new_p); 2553} 2554 2555// This add maintains unique property key in the list. 2556void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 2557 if (plist == NULL) 2558 return; 2559 2560 // If property key exist then update with new value. 2561 SystemProperty* prop; 2562 for (prop = *plist; prop != NULL; prop = prop->next()) { 2563 if (strcmp(k, prop->key()) == 0) { 2564 prop->set_value(v); 2565 return; 2566 } 2567 } 2568 2569 PropertyList_add(plist, k, v); 2570} 2571 2572#ifdef KERNEL 2573char *Arguments::get_kernel_properties() { 2574 // Find properties starting with kernel and append them to string 2575 // We need to find out how long they are first because the URL's that they 2576 // might point to could get long. 2577 int length = 0; 2578 SystemProperty* prop; 2579 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2580 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2581 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" 2582 } 2583 } 2584 // Add one for null terminator. 2585 char *props = AllocateHeap(length + 1, "get_kernel_properties"); 2586 if (length != 0) { 2587 int pos = 0; 2588 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2589 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2590 jio_snprintf(&props[pos], length-pos, 2591 "-D%s=%s ", prop->key(), prop->value()); 2592 pos = strlen(props); 2593 } 2594 } 2595 } 2596 // null terminate props in case of null 2597 props[length] = '\0'; 2598 return props; 2599} 2600#endif // KERNEL 2601 2602// Copies src into buf, replacing "%%" with "%" and "%p" with pid 2603// Returns true if all of the source pointed by src has been copied over to 2604// the destination buffer pointed by buf. Otherwise, returns false. 2605// Notes: 2606// 1. If the length (buflen) of the destination buffer excluding the 2607// NULL terminator character is not long enough for holding the expanded 2608// pid characters, it also returns false instead of returning the partially 2609// expanded one. 2610// 2. The passed in "buflen" should be large enough to hold the null terminator. 2611bool Arguments::copy_expand_pid(const char* src, size_t srclen, 2612 char* buf, size_t buflen) { 2613 const char* p = src; 2614 char* b = buf; 2615 const char* src_end = &src[srclen]; 2616 char* buf_end = &buf[buflen - 1]; 2617 2618 while (p < src_end && b < buf_end) { 2619 if (*p == '%') { 2620 switch (*(++p)) { 2621 case '%': // "%%" ==> "%" 2622 *b++ = *p++; 2623 break; 2624 case 'p': { // "%p" ==> current process id 2625 // buf_end points to the character before the last character so 2626 // that we could write '\0' to the end of the buffer. 2627 size_t buf_sz = buf_end - b + 1; 2628 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 2629 2630 // if jio_snprintf fails or the buffer is not long enough to hold 2631 // the expanded pid, returns false. 2632 if (ret < 0 || ret >= (int)buf_sz) { 2633 return false; 2634 } else { 2635 b += ret; 2636 assert(*b == '\0', "fail in copy_expand_pid"); 2637 if (p == src_end && b == buf_end + 1) { 2638 // reach the end of the buffer. 2639 return true; 2640 } 2641 } 2642 p++; 2643 break; 2644 } 2645 default : 2646 *b++ = '%'; 2647 } 2648 } else { 2649 *b++ = *p++; 2650 } 2651 } 2652 *b = '\0'; 2653 return (p == src_end); // return false if not all of the source was copied 2654} 2655