arguments.cpp revision 61:5a76ab815e34
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) { 1258// Sample flag setting code 1259// if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1260// FLAG_SET_DEFAULT(EliminateZeroing, true); 1261// } 1262 } 1263} 1264 1265//=========================================================================================================== 1266// Parsing of java.compiler property 1267 1268void Arguments::process_java_compiler_argument(char* arg) { 1269 // For backwards compatibility, Djava.compiler=NONE or "" 1270 // causes us to switch to -Xint mode UNLESS -Xdebug 1271 // is also specified. 1272 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1273 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1274 } 1275} 1276 1277void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 1278 _sun_java_launcher = strdup(launcher); 1279} 1280 1281bool Arguments::created_by_java_launcher() { 1282 assert(_sun_java_launcher != NULL, "property must have value"); 1283 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 1284} 1285 1286//=========================================================================================================== 1287// Parsing of main arguments 1288 1289bool Arguments::verify_percentage(uintx value, const char* name) { 1290 if (value <= 100) { 1291 return true; 1292 } 1293 jio_fprintf(defaultStream::error_stream(), 1294 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 1295 name, value); 1296 return false; 1297} 1298 1299static void set_serial_gc_flags() { 1300 FLAG_SET_DEFAULT(UseSerialGC, true); 1301 FLAG_SET_DEFAULT(UseParNewGC, false); 1302 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); 1303 FLAG_SET_DEFAULT(UseParallelGC, false); 1304 FLAG_SET_DEFAULT(UseParallelOldGC, false); 1305} 1306 1307static bool verify_serial_gc_flags() { 1308 return (UseSerialGC && 1309 !(UseParNewGC || UseConcMarkSweepGC || UseParallelGC || 1310 UseParallelOldGC)); 1311} 1312 1313// Check the consistency of vm_init_args 1314bool Arguments::check_vm_args_consistency() { 1315 // Method for adding checks for flag consistency. 1316 // The intent is to warn the user of all possible conflicts, 1317 // before returning an error. 1318 // Note: Needs platform-dependent factoring. 1319 bool status = true; 1320 1321#if ( (defined(COMPILER2) && defined(SPARC))) 1322 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init 1323 // on sparc doesn't require generation of a stub as is the case on, e.g., 1324 // x86. Normally, VM_Version_init must be called from init_globals in 1325 // init.cpp, which is called by the initial java thread *after* arguments 1326 // have been parsed. VM_Version_init gets called twice on sparc. 1327 extern void VM_Version_init(); 1328 VM_Version_init(); 1329 if (!VM_Version::has_v9()) { 1330 jio_fprintf(defaultStream::error_stream(), 1331 "V8 Machine detected, Server requires V9\n"); 1332 status = false; 1333 } 1334#endif /* COMPILER2 && SPARC */ 1335 1336 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product 1337 // builds so the cost of stack banging can be measured. 1338#if (defined(PRODUCT) && defined(SOLARIS)) 1339 if (!UseBoundThreads && !UseStackBanging) { 1340 jio_fprintf(defaultStream::error_stream(), 1341 "-UseStackBanging conflicts with -UseBoundThreads\n"); 1342 1343 status = false; 1344 } 1345#endif 1346 1347 if (TLABRefillWasteFraction == 0) { 1348 jio_fprintf(defaultStream::error_stream(), 1349 "TLABRefillWasteFraction should be a denominator, " 1350 "not " SIZE_FORMAT "\n", 1351 TLABRefillWasteFraction); 1352 status = false; 1353 } 1354 1355 status &= verify_percentage(MaxLiveObjectEvacuationRatio, 1356 "MaxLiveObjectEvacuationRatio"); 1357 status &= verify_percentage(AdaptiveSizePolicyWeight, 1358 "AdaptiveSizePolicyWeight"); 1359 status &= verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); 1360 status &= verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 1361 status &= verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); 1362 status &= verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); 1363 1364 if (MinHeapFreeRatio > MaxHeapFreeRatio) { 1365 jio_fprintf(defaultStream::error_stream(), 1366 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 1367 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", 1368 MinHeapFreeRatio, MaxHeapFreeRatio); 1369 status = false; 1370 } 1371 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1372 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); 1373 1374 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 1375 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 1376 } 1377 1378 status &= verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1379 status &= verify_percentage(GCTimeLimit, "GCTimeLimit"); 1380 if (GCTimeLimit == 100) { 1381 // Turn off gc-overhead-limit-exceeded checks 1382 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 1383 } 1384 1385 status &= verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 1386 1387 // Check user specified sharing option conflict with Parallel GC 1388 bool cannot_share = (UseConcMarkSweepGC || UseParallelGC || 1389 UseParallelOldGC || UseParNewGC || 1390 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); 1391 1392 if (cannot_share) { 1393 // Either force sharing on by forcing the other options off, or 1394 // force sharing off. 1395 if (DumpSharedSpaces || ForceSharedSpaces) { 1396 set_serial_gc_flags(); 1397 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); 1398 } else { 1399 no_shared_spaces(); 1400 } 1401 } 1402 1403 // Ensure that the user has not selected conflicting sets 1404 // of collectors. [Note: this check is merely a user convenience; 1405 // collectors over-ride each other so that only a non-conflicting 1406 // set is selected; however what the user gets is not what they 1407 // may have expected from the combination they asked for. It's 1408 // better to reduce user confusion by not allowing them to 1409 // select conflicting combinations. 1410 uint i = 0; 1411 if (UseSerialGC) i++; 1412 if (UseConcMarkSweepGC || UseParNewGC) i++; 1413 if (UseParallelGC || UseParallelOldGC) i++; 1414 if (i > 1) { 1415 jio_fprintf(defaultStream::error_stream(), 1416 "Conflicting collector combinations in option list; " 1417 "please refer to the release notes for the combinations " 1418 "allowed\n"); 1419 status = false; 1420 } 1421 1422 if (_has_alloc_profile) { 1423 if (UseParallelGC || UseParallelOldGC) { 1424 jio_fprintf(defaultStream::error_stream(), 1425 "error: invalid argument combination.\n" 1426 "Allocation profiling (-Xaprof) cannot be used together with " 1427 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); 1428 status = false; 1429 } 1430 if (UseConcMarkSweepGC) { 1431 jio_fprintf(defaultStream::error_stream(), 1432 "error: invalid argument combination.\n" 1433 "Allocation profiling (-Xaprof) cannot be used together with " 1434 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); 1435 status = false; 1436 } 1437 } 1438 1439 if (CMSIncrementalMode) { 1440 if (!UseConcMarkSweepGC) { 1441 jio_fprintf(defaultStream::error_stream(), 1442 "error: invalid argument combination.\n" 1443 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 1444 "selected in order\nto use CMSIncrementalMode.\n"); 1445 status = false; 1446 } else if (!UseTLAB) { 1447 jio_fprintf(defaultStream::error_stream(), 1448 "error: CMSIncrementalMode requires thread-local " 1449 "allocation buffers\n(-XX:+UseTLAB).\n"); 1450 status = false; 1451 } else { 1452 status &= verify_percentage(CMSIncrementalDutyCycle, 1453 "CMSIncrementalDutyCycle"); 1454 status &= verify_percentage(CMSIncrementalDutyCycleMin, 1455 "CMSIncrementalDutyCycleMin"); 1456 status &= verify_percentage(CMSIncrementalSafetyFactor, 1457 "CMSIncrementalSafetyFactor"); 1458 status &= verify_percentage(CMSIncrementalOffset, 1459 "CMSIncrementalOffset"); 1460 status &= verify_percentage(CMSExpAvgFactor, 1461 "CMSExpAvgFactor"); 1462 // If it was not set on the command line, set 1463 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 1464 if (CMSInitiatingOccupancyFraction < 0) { 1465 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 1466 } 1467 } 1468 } 1469 1470 if (UseNUMA && !UseTLAB) { 1471 jio_fprintf(defaultStream::error_stream(), 1472 "error: NUMA allocator (-XX:+UseNUMA) requires thread-local " 1473 "allocation\nbuffers (-XX:+UseTLAB).\n"); 1474 status = false; 1475 } 1476 1477 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 1478 // insists that we hold the requisite locks so that the iteration is 1479 // MT-safe. For the verification at start-up and shut-down, we don't 1480 // yet have a good way of acquiring and releasing these locks, 1481 // which are not visible at the CollectedHeap level. We want to 1482 // be able to acquire these locks and then do the iteration rather 1483 // than just disable the lock verification. This will be fixed under 1484 // bug 4788986. 1485 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 1486 if (VerifyGCStartAt == 0) { 1487 warning("Heap verification at start-up disabled " 1488 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1489 VerifyGCStartAt = 1; // Disable verification at start-up 1490 } 1491 if (VerifyBeforeExit) { 1492 warning("Heap verification at shutdown disabled " 1493 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 1494 VerifyBeforeExit = false; // Disable verification at shutdown 1495 } 1496 } 1497 1498 // Note: only executed in non-PRODUCT mode 1499 if (!UseAsyncConcMarkSweepGC && 1500 (ExplicitGCInvokesConcurrent || 1501 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 1502 jio_fprintf(defaultStream::error_stream(), 1503 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" 1504 " with -UseAsyncConcMarkSweepGC"); 1505 status = false; 1506 } 1507 1508 return status; 1509} 1510 1511bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 1512 const char* option_type) { 1513 if (ignore) return false; 1514 1515 const char* spacer = " "; 1516 if (option_type == NULL) { 1517 option_type = ++spacer; // Set both to the empty string. 1518 } 1519 1520 if (os::obsolete_option(option)) { 1521 jio_fprintf(defaultStream::error_stream(), 1522 "Obsolete %s%soption: %s\n", option_type, spacer, 1523 option->optionString); 1524 return false; 1525 } else { 1526 jio_fprintf(defaultStream::error_stream(), 1527 "Unrecognized %s%soption: %s\n", option_type, spacer, 1528 option->optionString); 1529 return true; 1530 } 1531} 1532 1533static const char* user_assertion_options[] = { 1534 "-da", "-ea", "-disableassertions", "-enableassertions", 0 1535}; 1536 1537static const char* system_assertion_options[] = { 1538 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 1539}; 1540 1541// Return true if any of the strings in null-terminated array 'names' matches. 1542// If tail_allowed is true, then the tail must begin with a colon; otherwise, 1543// the option must match exactly. 1544static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 1545 bool tail_allowed) { 1546 for (/* empty */; *names != NULL; ++names) { 1547 if (match_option(option, *names, tail)) { 1548 if (**tail == '\0' || tail_allowed && **tail == ':') { 1549 return true; 1550 } 1551 } 1552 } 1553 return false; 1554} 1555 1556Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 1557 jlong* long_arg, 1558 jlong min_size) { 1559 if (!atomll(s, long_arg)) return arg_unreadable; 1560 return check_memory_size(*long_arg, min_size); 1561} 1562 1563// Parse JavaVMInitArgs structure 1564 1565jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 1566 // For components of the system classpath. 1567 SysClassPath scp(Arguments::get_sysclasspath()); 1568 bool scp_assembly_required = false; 1569 1570 // Save default settings for some mode flags 1571 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 1572 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 1573 Arguments::_ClipInlining = ClipInlining; 1574 Arguments::_BackgroundCompilation = BackgroundCompilation; 1575 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; 1576 1577 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 1578 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 1579 if (result != JNI_OK) { 1580 return result; 1581 } 1582 1583 // Parse JavaVMInitArgs structure passed in 1584 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); 1585 if (result != JNI_OK) { 1586 return result; 1587 } 1588 1589 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 1590 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 1591 if (result != JNI_OK) { 1592 return result; 1593 } 1594 1595 // Do final processing now that all arguments have been parsed 1596 result = finalize_vm_init_args(&scp, scp_assembly_required); 1597 if (result != JNI_OK) { 1598 return result; 1599 } 1600 1601 return JNI_OK; 1602} 1603 1604 1605jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 1606 SysClassPath* scp_p, 1607 bool* scp_assembly_required_p, 1608 FlagValueOrigin origin) { 1609 // Remaining part of option string 1610 const char* tail; 1611 1612 // iterate over arguments 1613 for (int index = 0; index < args->nOptions; index++) { 1614 bool is_absolute_path = false; // for -agentpath vs -agentlib 1615 1616 const JavaVMOption* option = args->options + index; 1617 1618 if (!match_option(option, "-Djava.class.path", &tail) && 1619 !match_option(option, "-Dsun.java.command", &tail) && 1620 !match_option(option, "-Dsun.java.launcher", &tail)) { 1621 1622 // add all jvm options to the jvm_args string. This string 1623 // is used later to set the java.vm.args PerfData string constant. 1624 // the -Djava.class.path and the -Dsun.java.command options are 1625 // omitted from jvm_args string as each have their own PerfData 1626 // string constant object. 1627 build_jvm_args(option->optionString); 1628 } 1629 1630 // -verbose:[class/gc/jni] 1631 if (match_option(option, "-verbose", &tail)) { 1632 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 1633 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 1634 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1635 } else if (!strcmp(tail, ":gc")) { 1636 FLAG_SET_CMDLINE(bool, PrintGC, true); 1637 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1638 } else if (!strcmp(tail, ":jni")) { 1639 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 1640 } 1641 // -da / -ea / -disableassertions / -enableassertions 1642 // These accept an optional class/package name separated by a colon, e.g., 1643 // -da:java.lang.Thread. 1644 } else if (match_option(option, user_assertion_options, &tail, true)) { 1645 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1646 if (*tail == '\0') { 1647 JavaAssertions::setUserClassDefault(enable); 1648 } else { 1649 assert(*tail == ':', "bogus match by match_option()"); 1650 JavaAssertions::addOption(tail + 1, enable); 1651 } 1652 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 1653 } else if (match_option(option, system_assertion_options, &tail, false)) { 1654 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 1655 JavaAssertions::setSystemClassDefault(enable); 1656 // -bootclasspath: 1657 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 1658 scp_p->reset_path(tail); 1659 *scp_assembly_required_p = true; 1660 // -bootclasspath/a: 1661 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 1662 scp_p->add_suffix(tail); 1663 *scp_assembly_required_p = true; 1664 // -bootclasspath/p: 1665 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 1666 scp_p->add_prefix(tail); 1667 *scp_assembly_required_p = true; 1668 // -Xrun 1669 } else if (match_option(option, "-Xrun", &tail)) { 1670 if(tail != NULL) { 1671 const char* pos = strchr(tail, ':'); 1672 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1673 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1674 name[len] = '\0'; 1675 1676 char *options = NULL; 1677 if(pos != NULL) { 1678 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 1679 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); 1680 } 1681#ifdef JVMTI_KERNEL 1682 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1683 warning("profiling and debugging agents are not supported with Kernel VM"); 1684 } else 1685#endif // JVMTI_KERNEL 1686 add_init_library(name, options); 1687 } 1688 // -agentlib and -agentpath 1689 } else if (match_option(option, "-agentlib:", &tail) || 1690 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 1691 if(tail != NULL) { 1692 const char* pos = strchr(tail, '='); 1693 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 1694 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); 1695 name[len] = '\0'; 1696 1697 char *options = NULL; 1698 if(pos != NULL) { 1699 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); 1700 } 1701#ifdef JVMTI_KERNEL 1702 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 1703 warning("profiling and debugging agents are not supported with Kernel VM"); 1704 } else 1705#endif // JVMTI_KERNEL 1706 add_init_agent(name, options, is_absolute_path); 1707 1708 } 1709 // -javaagent 1710 } else if (match_option(option, "-javaagent:", &tail)) { 1711 if(tail != NULL) { 1712 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); 1713 add_init_agent("instrument", options, false); 1714 } 1715 // -Xnoclassgc 1716 } else if (match_option(option, "-Xnoclassgc", &tail)) { 1717 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 1718 // -Xincgc: i-CMS 1719 } else if (match_option(option, "-Xincgc", &tail)) { 1720 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1721 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 1722 // -Xnoincgc: no i-CMS 1723 } else if (match_option(option, "-Xnoincgc", &tail)) { 1724 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1725 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 1726 // -Xconcgc 1727 } else if (match_option(option, "-Xconcgc", &tail)) { 1728 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 1729 // -Xnoconcgc 1730 } else if (match_option(option, "-Xnoconcgc", &tail)) { 1731 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 1732 // -Xbatch 1733 } else if (match_option(option, "-Xbatch", &tail)) { 1734 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1735 // -Xmn for compatibility with other JVM vendors 1736 } else if (match_option(option, "-Xmn", &tail)) { 1737 jlong long_initial_eden_size = 0; 1738 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); 1739 if (errcode != arg_in_range) { 1740 jio_fprintf(defaultStream::error_stream(), 1741 "Invalid initial eden size: %s\n", option->optionString); 1742 describe_range_error(errcode); 1743 return JNI_EINVAL; 1744 } 1745 FLAG_SET_CMDLINE(uintx, MaxNewSize, (size_t) long_initial_eden_size); 1746 FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size); 1747 // -Xms 1748 } else if (match_option(option, "-Xms", &tail)) { 1749 jlong long_initial_heap_size = 0; 1750 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); 1751 if (errcode != arg_in_range) { 1752 jio_fprintf(defaultStream::error_stream(), 1753 "Invalid initial heap size: %s\n", option->optionString); 1754 describe_range_error(errcode); 1755 return JNI_EINVAL; 1756 } 1757 set_initial_heap_size((size_t) long_initial_heap_size); 1758 // Currently the minimum size and the initial heap sizes are the same. 1759 set_min_heap_size(initial_heap_size()); 1760 // -Xmx 1761 } else if (match_option(option, "-Xmx", &tail)) { 1762 jlong long_max_heap_size = 0; 1763 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 1764 if (errcode != arg_in_range) { 1765 jio_fprintf(defaultStream::error_stream(), 1766 "Invalid maximum heap size: %s\n", option->optionString); 1767 describe_range_error(errcode); 1768 return JNI_EINVAL; 1769 } 1770 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (size_t) long_max_heap_size); 1771 // Xmaxf 1772 } else if (match_option(option, "-Xmaxf", &tail)) { 1773 int maxf = (int)(atof(tail) * 100); 1774 if (maxf < 0 || maxf > 100) { 1775 jio_fprintf(defaultStream::error_stream(), 1776 "Bad max heap free percentage size: %s\n", 1777 option->optionString); 1778 return JNI_EINVAL; 1779 } else { 1780 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 1781 } 1782 // Xminf 1783 } else if (match_option(option, "-Xminf", &tail)) { 1784 int minf = (int)(atof(tail) * 100); 1785 if (minf < 0 || minf > 100) { 1786 jio_fprintf(defaultStream::error_stream(), 1787 "Bad min heap free percentage size: %s\n", 1788 option->optionString); 1789 return JNI_EINVAL; 1790 } else { 1791 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 1792 } 1793 // -Xss 1794 } else if (match_option(option, "-Xss", &tail)) { 1795 jlong long_ThreadStackSize = 0; 1796 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 1797 if (errcode != arg_in_range) { 1798 jio_fprintf(defaultStream::error_stream(), 1799 "Invalid thread stack size: %s\n", option->optionString); 1800 describe_range_error(errcode); 1801 return JNI_EINVAL; 1802 } 1803 // Internally track ThreadStackSize in units of 1024 bytes. 1804 FLAG_SET_CMDLINE(intx, ThreadStackSize, 1805 round_to((int)long_ThreadStackSize, K) / K); 1806 // -Xoss 1807 } else if (match_option(option, "-Xoss", &tail)) { 1808 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 1809 // -Xmaxjitcodesize 1810 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { 1811 jlong long_ReservedCodeCacheSize = 0; 1812 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1813 InitialCodeCacheSize); 1814 if (errcode != arg_in_range) { 1815 jio_fprintf(defaultStream::error_stream(), 1816 "Invalid maximum code cache size: %s\n", 1817 option->optionString); 1818 describe_range_error(errcode); 1819 return JNI_EINVAL; 1820 } 1821 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 1822 // -green 1823 } else if (match_option(option, "-green", &tail)) { 1824 jio_fprintf(defaultStream::error_stream(), 1825 "Green threads support not available\n"); 1826 return JNI_EINVAL; 1827 // -native 1828 } else if (match_option(option, "-native", &tail)) { 1829 // HotSpot always uses native threads, ignore silently for compatibility 1830 // -Xsqnopause 1831 } else if (match_option(option, "-Xsqnopause", &tail)) { 1832 // EVM option, ignore silently for compatibility 1833 // -Xrs 1834 } else if (match_option(option, "-Xrs", &tail)) { 1835 // Classic/EVM option, new functionality 1836 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 1837 } else if (match_option(option, "-Xusealtsigs", &tail)) { 1838 // change default internal VM signals used - lower case for back compat 1839 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 1840 // -Xoptimize 1841 } else if (match_option(option, "-Xoptimize", &tail)) { 1842 // EVM option, ignore silently for compatibility 1843 // -Xprof 1844 } else if (match_option(option, "-Xprof", &tail)) { 1845#ifndef FPROF_KERNEL 1846 _has_profile = true; 1847#else // FPROF_KERNEL 1848 // do we have to exit? 1849 warning("Kernel VM does not support flat profiling."); 1850#endif // FPROF_KERNEL 1851 // -Xaprof 1852 } else if (match_option(option, "-Xaprof", &tail)) { 1853 _has_alloc_profile = true; 1854 // -Xconcurrentio 1855 } else if (match_option(option, "-Xconcurrentio", &tail)) { 1856 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 1857 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 1858 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 1859 FLAG_SET_CMDLINE(bool, UseTLAB, false); 1860 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 1861 1862 // -Xinternalversion 1863 } else if (match_option(option, "-Xinternalversion", &tail)) { 1864 jio_fprintf(defaultStream::output_stream(), "%s\n", 1865 VM_Version::internal_vm_info_string()); 1866 vm_exit(0); 1867#ifndef PRODUCT 1868 // -Xprintflags 1869 } else if (match_option(option, "-Xprintflags", &tail)) { 1870 CommandLineFlags::printFlags(); 1871 vm_exit(0); 1872#endif 1873 // -D 1874 } else if (match_option(option, "-D", &tail)) { 1875 if (!add_property(tail)) { 1876 return JNI_ENOMEM; 1877 } 1878 // Out of the box management support 1879 if (match_option(option, "-Dcom.sun.management", &tail)) { 1880 FLAG_SET_CMDLINE(bool, ManagementServer, true); 1881 } 1882 // -Xint 1883 } else if (match_option(option, "-Xint", &tail)) { 1884 set_mode_flags(_int); 1885 // -Xmixed 1886 } else if (match_option(option, "-Xmixed", &tail)) { 1887 set_mode_flags(_mixed); 1888 // -Xcomp 1889 } else if (match_option(option, "-Xcomp", &tail)) { 1890 // for testing the compiler; turn off all flags that inhibit compilation 1891 set_mode_flags(_comp); 1892 1893 // -Xshare:dump 1894 } else if (match_option(option, "-Xshare:dump", &tail)) { 1895#ifdef TIERED 1896 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1897 set_mode_flags(_int); // Prevent compilation, which creates objects 1898#elif defined(COMPILER2) 1899 vm_exit_during_initialization( 1900 "Dumping a shared archive is not supported on the Server JVM.", NULL); 1901#elif defined(KERNEL) 1902 vm_exit_during_initialization( 1903 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); 1904#else 1905 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 1906 set_mode_flags(_int); // Prevent compilation, which creates objects 1907#endif 1908 // -Xshare:on 1909 } else if (match_option(option, "-Xshare:on", &tail)) { 1910 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1911 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 1912#ifdef TIERED 1913 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); 1914#endif // TIERED 1915 // -Xshare:auto 1916 } else if (match_option(option, "-Xshare:auto", &tail)) { 1917 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 1918 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 1919 // -Xshare:off 1920 } else if (match_option(option, "-Xshare:off", &tail)) { 1921 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 1922 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 1923 1924 // -Xverify 1925 } else if (match_option(option, "-Xverify", &tail)) { 1926 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 1927 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 1928 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 1929 } else if (strcmp(tail, ":remote") == 0) { 1930 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 1931 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 1932 } else if (strcmp(tail, ":none") == 0) { 1933 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 1934 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 1935 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 1936 return JNI_EINVAL; 1937 } 1938 // -Xdebug 1939 } else if (match_option(option, "-Xdebug", &tail)) { 1940 // note this flag has been used, then ignore 1941 set_xdebug_mode(true); 1942 // -Xnoagent 1943 } else if (match_option(option, "-Xnoagent", &tail)) { 1944 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 1945 } else if (match_option(option, "-Xboundthreads", &tail)) { 1946 // Bind user level threads to kernel threads (Solaris only) 1947 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 1948 } else if (match_option(option, "-Xloggc:", &tail)) { 1949 // Redirect GC output to the file. -Xloggc:<filename> 1950 // ostream_init_log(), when called will use this filename 1951 // to initialize a fileStream. 1952 _gc_log_filename = strdup(tail); 1953 FLAG_SET_CMDLINE(bool, PrintGC, true); 1954 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 1955 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 1956 1957 // JNI hooks 1958 } else if (match_option(option, "-Xcheck", &tail)) { 1959 if (!strcmp(tail, ":jni")) { 1960 CheckJNICalls = true; 1961 } else if (is_bad_option(option, args->ignoreUnrecognized, 1962 "check")) { 1963 return JNI_EINVAL; 1964 } 1965 } else if (match_option(option, "vfprintf", &tail)) { 1966 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 1967 } else if (match_option(option, "exit", &tail)) { 1968 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 1969 } else if (match_option(option, "abort", &tail)) { 1970 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 1971 // -XX:+AggressiveHeap 1972 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 1973 1974 // This option inspects the machine and attempts to set various 1975 // parameters to be optimal for long-running, memory allocation 1976 // intensive jobs. It is intended for machines with large 1977 // amounts of cpu and memory. 1978 1979 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 1980 // VM, but we may not be able to represent the total physical memory 1981 // available (like having 8gb of memory on a box but using a 32bit VM). 1982 // Thus, we need to make sure we're using a julong for intermediate 1983 // calculations. 1984 julong initHeapSize; 1985 julong total_memory = os::physical_memory(); 1986 1987 if (total_memory < (julong)256*M) { 1988 jio_fprintf(defaultStream::error_stream(), 1989 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 1990 vm_exit(1); 1991 } 1992 1993 // The heap size is half of available memory, or (at most) 1994 // all of possible memory less 160mb (leaving room for the OS 1995 // when using ISM). This is the maximum; because adaptive sizing 1996 // is turned on below, the actual space used may be smaller. 1997 1998 initHeapSize = MIN2(total_memory / (julong)2, 1999 total_memory - (julong)160*M); 2000 2001 // Make sure that if we have a lot of memory we cap the 32 bit 2002 // process space. The 64bit VM version of this function is a nop. 2003 initHeapSize = os::allocatable_physical_memory(initHeapSize); 2004 2005 // The perm gen is separate but contiguous with the 2006 // object heap (and is reserved with it) so subtract it 2007 // from the heap size. 2008 if (initHeapSize > MaxPermSize) { 2009 initHeapSize = initHeapSize - MaxPermSize; 2010 } else { 2011 warning("AggressiveHeap and MaxPermSize values may conflict"); 2012 } 2013 2014 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2015 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 2016 set_initial_heap_size(MaxHeapSize); 2017 // Currently the minimum size and the initial heap sizes are the same. 2018 set_min_heap_size(initial_heap_size()); 2019 } 2020 if (FLAG_IS_DEFAULT(NewSize)) { 2021 // Make the young generation 3/8ths of the total heap. 2022 FLAG_SET_CMDLINE(uintx, NewSize, 2023 ((julong)MaxHeapSize / (julong)8) * (julong)3); 2024 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 2025 } 2026 2027 FLAG_SET_DEFAULT(UseLargePages, true); 2028 2029 // Increase some data structure sizes for efficiency 2030 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 2031 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2032 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 2033 2034 // See the OldPLABSize comment below, but replace 'after promotion' 2035 // with 'after copying'. YoungPLABSize is the size of the survivor 2036 // space per-gc-thread buffers. The default is 4kw. 2037 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 2038 2039 // OldPLABSize is the size of the buffers in the old gen that 2040 // UseParallelGC uses to promote live data that doesn't fit in the 2041 // survivor spaces. At any given time, there's one for each gc thread. 2042 // The default size is 1kw. These buffers are rarely used, since the 2043 // survivor spaces are usually big enough. For specjbb, however, there 2044 // are occasions when there's lots of live data in the young gen 2045 // and we end up promoting some of it. We don't have a definite 2046 // explanation for why bumping OldPLABSize helps, but the theory 2047 // is that a bigger PLAB results in retaining something like the 2048 // original allocation order after promotion, which improves mutator 2049 // locality. A minor effect may be that larger PLABs reduce the 2050 // number of PLAB allocation events during gc. The value of 8kw 2051 // was arrived at by experimenting with specjbb. 2052 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 2053 2054 // CompilationPolicyChoice=0 causes the server compiler to adopt 2055 // a more conservative which-method-do-I-compile policy when one 2056 // of the counters maintained by the interpreter trips. The 2057 // result is reduced startup time and improved specjbb and 2058 // alacrity performance. Zero is the default, but we set it 2059 // explicitly here in case the default changes. 2060 // See runtime/compilationPolicy.*. 2061 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); 2062 2063 // Enable parallel GC and adaptive generation sizing 2064 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 2065 FLAG_SET_DEFAULT(ParallelGCThreads, nof_parallel_gc_threads()); 2066 2067 // Encourage steady state memory management 2068 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 2069 2070 // This appears to improve mutator locality 2071 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2072 2073 // Get around early Solaris scheduling bug 2074 // (affinity vs other jobs on system) 2075 // but disallow DR and offlining (5008695). 2076 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 2077 2078 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 2079 // The last option must always win. 2080 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 2081 FLAG_SET_CMDLINE(bool, NeverTenure, true); 2082 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 2083 // The last option must always win. 2084 FLAG_SET_CMDLINE(bool, NeverTenure, false); 2085 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 2086 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 2087 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 2088 jio_fprintf(defaultStream::error_stream(), 2089 "Please use CMSClassUnloadingEnabled in place of " 2090 "CMSPermGenSweepingEnabled in the future\n"); 2091 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 2092 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 2093 jio_fprintf(defaultStream::error_stream(), 2094 "Please use -XX:+UseGCOverheadLimit in place of " 2095 "-XX:+UseGCTimeLimit in the future\n"); 2096 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 2097 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 2098 jio_fprintf(defaultStream::error_stream(), 2099 "Please use -XX:-UseGCOverheadLimit in place of " 2100 "-XX:-UseGCTimeLimit in the future\n"); 2101 // The TLE options are for compatibility with 1.3 and will be 2102 // removed without notice in a future release. These options 2103 // are not to be documented. 2104 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 2105 // No longer used. 2106 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 2107 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 2108 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 2109 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 2110 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 2111 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 2112 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 2113 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 2114 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 2115 // No longer used. 2116 } else if (match_option(option, "-XX:TLESize=", &tail)) { 2117 jlong long_tlab_size = 0; 2118 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 2119 if (errcode != arg_in_range) { 2120 jio_fprintf(defaultStream::error_stream(), 2121 "Invalid TLAB size: %s\n", option->optionString); 2122 describe_range_error(errcode); 2123 return JNI_EINVAL; 2124 } 2125 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 2126 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 2127 // No longer used. 2128 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 2129 FLAG_SET_CMDLINE(bool, UseTLAB, true); 2130 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 2131 FLAG_SET_CMDLINE(bool, UseTLAB, false); 2132SOLARIS_ONLY( 2133 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { 2134 warning("-XX:+UsePermISM is obsolete."); 2135 FLAG_SET_CMDLINE(bool, UseISM, true); 2136 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { 2137 FLAG_SET_CMDLINE(bool, UseISM, false); 2138) 2139 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 2140 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 2141 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 2142 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 2143 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 2144 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 2145 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 2146#ifdef SOLARIS 2147 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 2148 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 2149 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 2150 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 2151#else // ndef SOLARIS 2152 jio_fprintf(defaultStream::error_stream(), 2153 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); 2154 return JNI_EINVAL; 2155#endif // ndef SOLARIS 2156 } else 2157#ifdef ASSERT 2158 if (match_option(option, "-XX:+FullGCALot", &tail)) { 2159 FLAG_SET_CMDLINE(bool, FullGCALot, true); 2160 // disable scavenge before parallel mark-compact 2161 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2162 } else 2163#endif 2164 if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 2165 julong cms_blocks_to_claim = (julong)atol(tail); 2166 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 2167 jio_fprintf(defaultStream::error_stream(), 2168 "Please use -XX:CMSParPromoteBlocksToClaim in place of " 2169 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 2170 } else 2171 if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 2172 jlong old_plab_size = 0; 2173 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 2174 if (errcode != arg_in_range) { 2175 jio_fprintf(defaultStream::error_stream(), 2176 "Invalid old PLAB size: %s\n", option->optionString); 2177 describe_range_error(errcode); 2178 return JNI_EINVAL; 2179 } 2180 FLAG_SET_CMDLINE(uintx, OldPLABSize, (julong)old_plab_size); 2181 jio_fprintf(defaultStream::error_stream(), 2182 "Please use -XX:OldPLABSize in place of " 2183 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 2184 } else 2185 if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 2186 jlong young_plab_size = 0; 2187 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 2188 if (errcode != arg_in_range) { 2189 jio_fprintf(defaultStream::error_stream(), 2190 "Invalid young PLAB size: %s\n", option->optionString); 2191 describe_range_error(errcode); 2192 return JNI_EINVAL; 2193 } 2194 FLAG_SET_CMDLINE(uintx, YoungPLABSize, (julong)young_plab_size); 2195 jio_fprintf(defaultStream::error_stream(), 2196 "Please use -XX:YoungPLABSize in place of " 2197 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 2198 } else 2199 if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 2200 // Skip -XX:Flags= since that case has already been handled 2201 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 2202 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 2203 return JNI_EINVAL; 2204 } 2205 } 2206 // Unknown option 2207 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 2208 return JNI_ERR; 2209 } 2210 } 2211 2212 return JNI_OK; 2213} 2214 2215jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 2216 // This must be done after all -D arguments have been processed. 2217 scp_p->expand_endorsed(); 2218 2219 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { 2220 // Assemble the bootclasspath elements into the final path. 2221 Arguments::set_sysclasspath(scp_p->combined_path()); 2222 } 2223 2224 // This must be done after all arguments have been processed. 2225 // java_compiler() true means set to "NONE" or empty. 2226 if (java_compiler() && !xdebug_mode()) { 2227 // For backwards compatibility, we switch to interpreted mode if 2228 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 2229 // not specified. 2230 set_mode_flags(_int); 2231 } 2232 if (CompileThreshold == 0) { 2233 set_mode_flags(_int); 2234 } 2235 2236#ifdef TIERED 2237 // If we are using tiered compilation in the tiered vm then c1 will 2238 // do the profiling and we don't want to waste that time in the 2239 // interpreter. 2240 if (TieredCompilation) { 2241 ProfileInterpreter = false; 2242 } else { 2243 // Since we are running vanilla server we must adjust the compile threshold 2244 // unless the user has already adjusted it because the default threshold assumes 2245 // we will run tiered. 2246 2247 if (FLAG_IS_DEFAULT(CompileThreshold)) { 2248 CompileThreshold = Tier2CompileThreshold; 2249 } 2250 } 2251#endif // TIERED 2252 2253#ifndef COMPILER2 2254 // Don't degrade server performance for footprint 2255 if (FLAG_IS_DEFAULT(UseLargePages) && 2256 MaxHeapSize < LargePageHeapSizeThreshold) { 2257 // No need for large granularity pages w/small heaps. 2258 // Note that large pages are enabled/disabled for both the 2259 // Java heap and the code cache. 2260 FLAG_SET_DEFAULT(UseLargePages, false); 2261 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); 2262 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); 2263 } 2264#else 2265 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 2266 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 2267 } 2268#endif 2269 2270 if (!check_vm_args_consistency()) { 2271 return JNI_ERR; 2272 } 2273 2274 return JNI_OK; 2275} 2276 2277jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2278 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 2279 scp_assembly_required_p); 2280} 2281 2282jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 2283 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 2284 scp_assembly_required_p); 2285} 2286 2287jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 2288 const int N_MAX_OPTIONS = 64; 2289 const int OPTION_BUFFER_SIZE = 1024; 2290 char buffer[OPTION_BUFFER_SIZE]; 2291 2292 // The variable will be ignored if it exceeds the length of the buffer. 2293 // Don't check this variable if user has special privileges 2294 // (e.g. unix su command). 2295 if (os::getenv(name, buffer, sizeof(buffer)) && 2296 !os::have_special_privileges()) { 2297 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 2298 jio_fprintf(defaultStream::error_stream(), 2299 "Picked up %s: %s\n", name, buffer); 2300 char* rd = buffer; // pointer to the input string (rd) 2301 int i; 2302 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 2303 while (isspace(*rd)) rd++; // skip whitespace 2304 if (*rd == 0) break; // we re done when the input string is read completely 2305 2306 // The output, option string, overwrites the input string. 2307 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 2308 // input string (rd). 2309 char* wrt = rd; 2310 2311 options[i++].optionString = wrt; // Fill in option 2312 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 2313 if (*rd == '\'' || *rd == '"') { // handle a quoted string 2314 int quote = *rd; // matching quote to look for 2315 rd++; // don't copy open quote 2316 while (*rd != quote) { // include everything (even spaces) up until quote 2317 if (*rd == 0) { // string termination means unmatched string 2318 jio_fprintf(defaultStream::error_stream(), 2319 "Unmatched quote in %s\n", name); 2320 return JNI_ERR; 2321 } 2322 *wrt++ = *rd++; // copy to option string 2323 } 2324 rd++; // don't copy close quote 2325 } else { 2326 *wrt++ = *rd++; // copy to option string 2327 } 2328 } 2329 // Need to check if we're done before writing a NULL, 2330 // because the write could be to the byte that rd is pointing to. 2331 if (*rd++ == 0) { 2332 *wrt = 0; 2333 break; 2334 } 2335 *wrt = 0; // Zero terminate option 2336 } 2337 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 2338 JavaVMInitArgs vm_args; 2339 vm_args.version = JNI_VERSION_1_2; 2340 vm_args.options = options; 2341 vm_args.nOptions = i; 2342 vm_args.ignoreUnrecognized = false; 2343 2344 if (PrintVMOptions) { 2345 const char* tail; 2346 for (int i = 0; i < vm_args.nOptions; i++) { 2347 const JavaVMOption *option = vm_args.options + i; 2348 if (match_option(option, "-XX:", &tail)) { 2349 logOption(tail); 2350 } 2351 } 2352 } 2353 2354 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); 2355 } 2356 return JNI_OK; 2357} 2358 2359// Parse entry point called from JNI_CreateJavaVM 2360 2361jint Arguments::parse(const JavaVMInitArgs* args) { 2362 2363 // Sharing support 2364 // Construct the path to the archive 2365 char jvm_path[JVM_MAXPATHLEN]; 2366 os::jvm_path(jvm_path, sizeof(jvm_path)); 2367#ifdef TIERED 2368 if (strstr(jvm_path, "client") != NULL) { 2369 force_client_mode = true; 2370 } 2371#endif // TIERED 2372 char *end = strrchr(jvm_path, *os::file_separator()); 2373 if (end != NULL) *end = '\0'; 2374 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + 2375 strlen(os::file_separator()) + 20); 2376 if (shared_archive_path == NULL) return JNI_ENOMEM; 2377 strcpy(shared_archive_path, jvm_path); 2378 strcat(shared_archive_path, os::file_separator()); 2379 strcat(shared_archive_path, "classes"); 2380 DEBUG_ONLY(strcat(shared_archive_path, "_g");) 2381 strcat(shared_archive_path, ".jsa"); 2382 SharedArchivePath = shared_archive_path; 2383 2384 // Remaining part of option string 2385 const char* tail; 2386 2387 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 2388 bool settings_file_specified = false; 2389 int index; 2390 for (index = 0; index < args->nOptions; index++) { 2391 const JavaVMOption *option = args->options + index; 2392 if (match_option(option, "-XX:Flags=", &tail)) { 2393 if (!process_settings_file(tail, true, args->ignoreUnrecognized)) { 2394 return JNI_EINVAL; 2395 } 2396 settings_file_specified = true; 2397 } 2398 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 2399 PrintVMOptions = true; 2400 } 2401 } 2402 2403 // Parse default .hotspotrc settings file 2404 if (!settings_file_specified) { 2405 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 2406 return JNI_EINVAL; 2407 } 2408 } 2409 2410 if (PrintVMOptions) { 2411 for (index = 0; index < args->nOptions; index++) { 2412 const JavaVMOption *option = args->options + index; 2413 if (match_option(option, "-XX:", &tail)) { 2414 logOption(tail); 2415 } 2416 } 2417 } 2418 2419 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 2420 jint result = parse_vm_init_args(args); 2421 if (result != JNI_OK) { 2422 return result; 2423 } 2424 2425#ifndef PRODUCT 2426 if (TraceBytecodesAt != 0) { 2427 TraceBytecodes = true; 2428 } 2429 if (CountCompiledCalls) { 2430 if (UseCounterDecay) { 2431 warning("UseCounterDecay disabled because CountCalls is set"); 2432 UseCounterDecay = false; 2433 } 2434 } 2435#endif // PRODUCT 2436 2437 if (PrintGCDetails) { 2438 // Turn on -verbose:gc options as well 2439 PrintGC = true; 2440 if (FLAG_IS_DEFAULT(TraceClassUnloading)) { 2441 TraceClassUnloading = true; 2442 } 2443 } 2444 2445#ifdef SERIALGC 2446 set_serial_gc_flags(); 2447#endif // SERIALGC 2448#ifdef KERNEL 2449 no_shared_spaces(); 2450#endif // KERNEL 2451 2452 // Set some flags for ParallelGC if needed. 2453 set_parallel_gc_flags(); 2454 2455 // Set some flags for CMS and/or ParNew collectors, as needed. 2456 set_cms_and_parnew_gc_flags(); 2457 2458 // Set flags based on ergonomics. 2459 set_ergonomics_flags(); 2460 2461#ifdef SERIALGC 2462 assert(verify_serial_gc_flags(), "SerialGC unset"); 2463#endif // SERIALGC 2464 2465 // Set bytecode rewriting flags 2466 set_bytecode_flags(); 2467 2468 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. 2469 set_aggressive_opts_flags(); 2470 2471#ifdef CC_INTERP 2472 // Biased locking is not implemented with c++ interpreter 2473 FLAG_SET_DEFAULT(UseBiasedLocking, false); 2474#endif /* CC_INTERP */ 2475 2476 if (PrintCommandLineFlags) { 2477 CommandLineFlags::printSetFlags(); 2478 } 2479 2480 return JNI_OK; 2481} 2482 2483int Arguments::PropertyList_count(SystemProperty* pl) { 2484 int count = 0; 2485 while(pl != NULL) { 2486 count++; 2487 pl = pl->next(); 2488 } 2489 return count; 2490} 2491 2492const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 2493 assert(key != NULL, "just checking"); 2494 SystemProperty* prop; 2495 for (prop = pl; prop != NULL; prop = prop->next()) { 2496 if (strcmp(key, prop->key()) == 0) return prop->value(); 2497 } 2498 return NULL; 2499} 2500 2501const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 2502 int count = 0; 2503 const char* ret_val = NULL; 2504 2505 while(pl != NULL) { 2506 if(count >= index) { 2507 ret_val = pl->key(); 2508 break; 2509 } 2510 count++; 2511 pl = pl->next(); 2512 } 2513 2514 return ret_val; 2515} 2516 2517char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 2518 int count = 0; 2519 char* ret_val = NULL; 2520 2521 while(pl != NULL) { 2522 if(count >= index) { 2523 ret_val = pl->value(); 2524 break; 2525 } 2526 count++; 2527 pl = pl->next(); 2528 } 2529 2530 return ret_val; 2531} 2532 2533void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 2534 SystemProperty* p = *plist; 2535 if (p == NULL) { 2536 *plist = new_p; 2537 } else { 2538 while (p->next() != NULL) { 2539 p = p->next(); 2540 } 2541 p->set_next(new_p); 2542 } 2543} 2544 2545void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 2546 if (plist == NULL) 2547 return; 2548 2549 SystemProperty* new_p = new SystemProperty(k, v, true); 2550 PropertyList_add(plist, new_p); 2551} 2552 2553// This add maintains unique property key in the list. 2554void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { 2555 if (plist == NULL) 2556 return; 2557 2558 // If property key exist then update with new value. 2559 SystemProperty* prop; 2560 for (prop = *plist; prop != NULL; prop = prop->next()) { 2561 if (strcmp(k, prop->key()) == 0) { 2562 prop->set_value(v); 2563 return; 2564 } 2565 } 2566 2567 PropertyList_add(plist, k, v); 2568} 2569 2570#ifdef KERNEL 2571char *Arguments::get_kernel_properties() { 2572 // Find properties starting with kernel and append them to string 2573 // We need to find out how long they are first because the URL's that they 2574 // might point to could get long. 2575 int length = 0; 2576 SystemProperty* prop; 2577 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2578 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2579 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" 2580 } 2581 } 2582 // Add one for null terminator. 2583 char *props = AllocateHeap(length + 1, "get_kernel_properties"); 2584 if (length != 0) { 2585 int pos = 0; 2586 for (prop = _system_properties; prop != NULL; prop = prop->next()) { 2587 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { 2588 jio_snprintf(&props[pos], length-pos, 2589 "-D%s=%s ", prop->key(), prop->value()); 2590 pos = strlen(props); 2591 } 2592 } 2593 } 2594 // null terminate props in case of null 2595 props[length] = '\0'; 2596 return props; 2597} 2598#endif // KERNEL 2599 2600// Copies src into buf, replacing "%%" with "%" and "%p" with pid 2601// Returns true if all of the source pointed by src has been copied over to 2602// the destination buffer pointed by buf. Otherwise, returns false. 2603// Notes: 2604// 1. If the length (buflen) of the destination buffer excluding the 2605// NULL terminator character is not long enough for holding the expanded 2606// pid characters, it also returns false instead of returning the partially 2607// expanded one. 2608// 2. The passed in "buflen" should be large enough to hold the null terminator. 2609bool Arguments::copy_expand_pid(const char* src, size_t srclen, 2610 char* buf, size_t buflen) { 2611 const char* p = src; 2612 char* b = buf; 2613 const char* src_end = &src[srclen]; 2614 char* buf_end = &buf[buflen - 1]; 2615 2616 while (p < src_end && b < buf_end) { 2617 if (*p == '%') { 2618 switch (*(++p)) { 2619 case '%': // "%%" ==> "%" 2620 *b++ = *p++; 2621 break; 2622 case 'p': { // "%p" ==> current process id 2623 // buf_end points to the character before the last character so 2624 // that we could write '\0' to the end of the buffer. 2625 size_t buf_sz = buf_end - b + 1; 2626 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 2627 2628 // if jio_snprintf fails or the buffer is not long enough to hold 2629 // the expanded pid, returns false. 2630 if (ret < 0 || ret >= (int)buf_sz) { 2631 return false; 2632 } else { 2633 b += ret; 2634 assert(*b == '\0', "fail in copy_expand_pid"); 2635 if (p == src_end && b == buf_end + 1) { 2636 // reach the end of the buffer. 2637 return true; 2638 } 2639 } 2640 p++; 2641 break; 2642 } 2643 default : 2644 *b++ = '%'; 2645 } 2646 } else { 2647 *b++ = *p++; 2648 } 2649 } 2650 *b = '\0'; 2651 return (p == src_end); // return false if not all of the source was copied 2652} 2653