1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "jvm.h" 27 #include "classfile/classLoader.hpp" 28 #include "classfile/javaAssertions.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/symbolTable.hpp" 32 #include "gc/shared/collectorPolicy.hpp" 33 #include "gc/shared/gcArguments.hpp" 34 #include "gc/shared/gcConfig.hpp" 35 #include "logging/log.hpp" 36 #include "logging/logConfiguration.hpp" 37 #include "logging/logStream.hpp" 38 #include "logging/logTag.hpp" 39 #include "memory/allocation.inline.hpp" 40 #include "memory/universe.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "prims/jvmtiExport.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/arguments_ext.hpp" 45 #include "runtime/flags/jvmFlag.hpp" 46 #include "runtime/flags/jvmFlagConstraintList.hpp" 47 #include "runtime/flags/jvmFlagWriteableList.hpp" 48 #include "runtime/flags/jvmFlagRangeList.hpp" 49 #include "runtime/globals_extension.hpp" 50 #include "runtime/java.hpp" 51 #include "runtime/os.inline.hpp" 52 #include "runtime/safepoint.hpp" 53 #include "runtime/safepointMechanism.hpp" 54 #include "runtime/vm_version.hpp" 55 #include "services/management.hpp" 56 #include "services/memTracker.hpp" 57 #include "utilities/align.hpp" 58 #include "utilities/defaultStream.hpp" 59 #include "utilities/macros.hpp" 60 #include "utilities/stringUtils.hpp" 61 #if INCLUDE_JVMCI 62 #include "jvmci/jvmciRuntime.hpp" 63 #endif 64 #if INCLUDE_JFR 65 #include "jfr/jfr.hpp" 66 #endif 67 68 // Note: This is a special bug reporting site for the JVM 69 #ifdef VENDOR_URL_VM_BUG 70 # define DEFAULT_VENDOR_URL_BUG VENDOR_URL_VM_BUG 71 #else 72 # define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp" 73 #endif 74 #define DEFAULT_JAVA_LAUNCHER "generic" 75 76 char* Arguments::_jvm_flags_file = NULL; 77 char** Arguments::_jvm_flags_array = NULL; 78 int Arguments::_num_jvm_flags = 0; 79 char** Arguments::_jvm_args_array = NULL; 80 int Arguments::_num_jvm_args = 0; 81 char* Arguments::_java_command = NULL; 82 SystemProperty* Arguments::_system_properties = NULL; 83 const char* Arguments::_gc_log_filename = NULL; 84 size_t Arguments::_conservative_max_heap_alignment = 0; 85 size_t Arguments::_min_heap_size = 0; 86 Arguments::Mode Arguments::_mode = _mixed; 87 bool Arguments::_java_compiler = false; 88 bool Arguments::_xdebug_mode = false; 89 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 90 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 91 int Arguments::_sun_java_launcher_pid = -1; 92 bool Arguments::_sun_java_launcher_is_altjvm = false; 93 94 // These parameters are reset in method parse_vm_init_args() 95 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 96 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 97 bool Arguments::_BackgroundCompilation = BackgroundCompilation; 98 bool Arguments::_ClipInlining = ClipInlining; 99 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 100 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 101 102 bool Arguments::_enable_preview = false; 103 104 char* Arguments::SharedArchivePath = NULL; 105 106 AgentLibraryList Arguments::_libraryList; 107 AgentLibraryList Arguments::_agentList; 108 109 abort_hook_t Arguments::_abort_hook = NULL; 110 exit_hook_t Arguments::_exit_hook = NULL; 111 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 112 113 114 SystemProperty *Arguments::_sun_boot_library_path = NULL; 115 SystemProperty *Arguments::_java_library_path = NULL; 116 SystemProperty *Arguments::_java_home = NULL; 117 SystemProperty *Arguments::_java_class_path = NULL; 118 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL; 119 SystemProperty *Arguments::_vm_info = NULL; 120 121 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL; 122 PathString *Arguments::_system_boot_class_path = NULL; 123 bool Arguments::_has_jimage = false; 124 125 char* Arguments::_ext_dirs = NULL; 126 127 bool PathString::set_value(const char *value) { 128 if (_value != NULL) { 129 FreeHeap(_value); 130 } 131 _value = AllocateHeap(strlen(value)+1, mtArguments); 132 assert(_value != NULL, "Unable to allocate space for new path value"); 133 if (_value != NULL) { 134 strcpy(_value, value); 135 } else { 136 // not able to allocate 137 return false; 138 } 139 return true; 140 } 141 142 void PathString::append_value(const char *value) { 143 char *sp; 144 size_t len = 0; 145 if (value != NULL) { 146 len = strlen(value); 147 if (_value != NULL) { 148 len += strlen(_value); 149 } 150 sp = AllocateHeap(len+2, mtArguments); 151 assert(sp != NULL, "Unable to allocate space for new append path value"); 152 if (sp != NULL) { 153 if (_value != NULL) { 154 strcpy(sp, _value); 155 strcat(sp, os::path_separator()); 156 strcat(sp, value); 157 FreeHeap(_value); 158 } else { 159 strcpy(sp, value); 160 } 161 _value = sp; 162 } 163 } 164 } 165 166 PathString::PathString(const char* value) { 167 if (value == NULL) { 168 _value = NULL; 169 } else { 170 _value = AllocateHeap(strlen(value)+1, mtArguments); 171 strcpy(_value, value); 172 } 173 } 174 175 PathString::~PathString() { 176 if (_value != NULL) { 177 FreeHeap(_value); 178 _value = NULL; 179 } 180 } 181 182 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) { 183 assert(module_name != NULL && path != NULL, "Invalid module name or path value"); 184 size_t len = strlen(module_name) + 1; 185 _module_name = AllocateHeap(len, mtInternal); 186 strncpy(_module_name, module_name, len); // copy the trailing null 187 _path = new PathString(path); 188 } 189 190 ModulePatchPath::~ModulePatchPath() { 191 if (_module_name != NULL) { 192 FreeHeap(_module_name); 193 _module_name = NULL; 194 } 195 if (_path != NULL) { 196 delete _path; 197 _path = NULL; 198 } 199 } 200 201 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) { 202 if (key == NULL) { 203 _key = NULL; 204 } else { 205 _key = AllocateHeap(strlen(key)+1, mtArguments); 206 strcpy(_key, key); 207 } 208 _next = NULL; 209 _internal = internal; 210 _writeable = writeable; 211 } 212 213 AgentLibrary::AgentLibrary(const char* name, const char* options, 214 bool is_absolute_path, void* os_lib, 215 bool instrument_lib) { 216 _name = AllocateHeap(strlen(name)+1, mtArguments); 217 strcpy(_name, name); 218 if (options == NULL) { 219 _options = NULL; 220 } else { 221 _options = AllocateHeap(strlen(options)+1, mtArguments); 222 strcpy(_options, options); 223 } 224 _is_absolute_path = is_absolute_path; 225 _os_lib = os_lib; 226 _next = NULL; 227 _state = agent_invalid; 228 _is_static_lib = false; 229 _is_instrument_lib = instrument_lib; 230 } 231 232 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining 233 // part of the option string. 234 static bool match_option(const JavaVMOption *option, const char* name, 235 const char** tail) { 236 size_t len = strlen(name); 237 if (strncmp(option->optionString, name, len) == 0) { 238 *tail = option->optionString + len; 239 return true; 240 } else { 241 return false; 242 } 243 } 244 245 // Check if 'option' matches 'name'. No "tail" is allowed. 246 static bool match_option(const JavaVMOption *option, const char* name) { 247 const char* tail = NULL; 248 bool result = match_option(option, name, &tail); 249 if (tail != NULL && *tail == '\0') { 250 return result; 251 } else { 252 return false; 253 } 254 } 255 256 // Return true if any of the strings in null-terminated array 'names' matches. 257 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 258 // the option must match exactly. 259 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 260 bool tail_allowed) { 261 for (/* empty */; *names != NULL; ++names) { 262 if (match_option(option, *names, tail)) { 263 if (**tail == '\0' || (tail_allowed && **tail == ':')) { 264 return true; 265 } 266 } 267 } 268 return false; 269 } 270 271 #if INCLUDE_JFR 272 // return true on failure 273 static bool match_jfr_option(const JavaVMOption** option) { 274 assert((*option)->optionString != NULL, "invariant"); 275 char* tail = NULL; 276 if (match_option(*option, "-XX:StartFlightRecording", (const char**)&tail)) { 277 return Jfr::on_start_flight_recording_option(option, tail); 278 } else if (match_option(*option, "-XX:FlightRecorderOptions", (const char**)&tail)) { 279 return Jfr::on_flight_recorder_option(option, tail); 280 } 281 return false; 282 } 283 #endif 284 285 static void logOption(const char* opt) { 286 if (PrintVMOptions) { 287 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 288 } 289 } 290 291 bool needs_module_property_warning = false; 292 293 #define MODULE_PROPERTY_PREFIX "jdk.module." 294 #define MODULE_PROPERTY_PREFIX_LEN 11 295 #define ADDEXPORTS "addexports" 296 #define ADDEXPORTS_LEN 10 297 #define ADDREADS "addreads" 298 #define ADDREADS_LEN 8 299 #define ADDOPENS "addopens" 300 #define ADDOPENS_LEN 8 301 #define PATCH "patch" 302 #define PATCH_LEN 5 303 #define ADDMODS "addmods" 304 #define ADDMODS_LEN 7 305 #define LIMITMODS "limitmods" 306 #define LIMITMODS_LEN 9 307 #define PATH "path" 308 #define PATH_LEN 4 309 #define UPGRADE_PATH "upgrade.path" 310 #define UPGRADE_PATH_LEN 12 311 312 void Arguments::add_init_library(const char* name, char* options) { 313 _libraryList.add(new AgentLibrary(name, options, false, NULL)); 314 } 315 316 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) { 317 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); 318 } 319 320 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) { 321 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true)); 322 } 323 324 // Late-binding agents not started via arguments 325 void Arguments::add_loaded_agent(AgentLibrary *agentLib) { 326 _agentList.add(agentLib); 327 } 328 329 void Arguments::add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) { 330 _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); 331 } 332 333 // Return TRUE if option matches 'property', or 'property=', or 'property.'. 334 static bool matches_property_suffix(const char* option, const char* property, size_t len) { 335 return ((strncmp(option, property, len) == 0) && 336 (option[len] == '=' || option[len] == '.' || option[len] == '\0')); 337 } 338 339 // Return true if property starts with "jdk.module." and its ensuing chars match 340 // any of the reserved module properties. 341 // property should be passed without the leading "-D". 342 bool Arguments::is_internal_module_property(const char* property) { 343 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D"); 344 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) { 345 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN; 346 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) || 347 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) || 348 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) || 349 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) || 350 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) || 351 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) || 352 matches_property_suffix(property_suffix, PATH, PATH_LEN) || 353 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) { 354 return true; 355 } 356 } 357 return false; 358 } 359 360 // Process java launcher properties. 361 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 362 // See if sun.java.launcher, sun.java.launcher.is_altjvm or 363 // sun.java.launcher.pid is defined. 364 // Must do this before setting up other system properties, 365 // as some of them may depend on launcher type. 366 for (int index = 0; index < args->nOptions; index++) { 367 const JavaVMOption* option = args->options + index; 368 const char* tail; 369 370 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 371 process_java_launcher_argument(tail, option->extraInfo); 372 continue; 373 } 374 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { 375 if (strcmp(tail, "true") == 0) { 376 _sun_java_launcher_is_altjvm = true; 377 } 378 continue; 379 } 380 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 381 _sun_java_launcher_pid = atoi(tail); 382 continue; 383 } 384 } 385 } 386 387 // Initialize system properties key and value. 388 void Arguments::init_system_properties() { 389 390 // Set up _system_boot_class_path which is not a property but 391 // relies heavily on argument processing and the jdk.boot.class.path.append 392 // property. It is used to store the underlying system boot class path. 393 _system_boot_class_path = new PathString(NULL); 394 395 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 396 "Java Virtual Machine Specification", false)); 397 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 398 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 399 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false)); 400 401 // Initialize the vm.info now, but it will need updating after argument parsing. 402 _vm_info = new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true); 403 404 // Following are JVMTI agent writable properties. 405 // Properties values are set to NULL and they are 406 // os specific they are initialized in os::init_system_properties_values(). 407 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 408 _java_library_path = new SystemProperty("java.library.path", NULL, true); 409 _java_home = new SystemProperty("java.home", NULL, true); 410 _java_class_path = new SystemProperty("java.class.path", "", true); 411 // jdk.boot.class.path.append is a non-writeable, internal property. 412 // It can only be set by either: 413 // - -Xbootclasspath/a: 414 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase 415 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true); 416 417 // Add to System Property list. 418 PropertyList_add(&_system_properties, _sun_boot_library_path); 419 PropertyList_add(&_system_properties, _java_library_path); 420 PropertyList_add(&_system_properties, _java_home); 421 PropertyList_add(&_system_properties, _java_class_path); 422 PropertyList_add(&_system_properties, _jdk_boot_class_path_append); 423 PropertyList_add(&_system_properties, _vm_info); 424 425 // Set OS specific system properties values 426 os::init_system_properties_values(); 427 } 428 429 // Update/Initialize System properties after JDK version number is known 430 void Arguments::init_version_specific_system_properties() { 431 enum { bufsz = 16 }; 432 char buffer[bufsz]; 433 const char* spec_vendor = "Oracle Corporation"; 434 uint32_t spec_version = JDK_Version::current().major_version(); 435 436 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version); 437 438 PropertyList_add(&_system_properties, 439 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); 440 PropertyList_add(&_system_properties, 441 new SystemProperty("java.vm.specification.version", buffer, false)); 442 PropertyList_add(&_system_properties, 443 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 444 } 445 446 /* 447 * -XX argument processing: 448 * 449 * -XX arguments are defined in several places, such as: 450 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp. 451 * -XX arguments are parsed in parse_argument(). 452 * -XX argument bounds checking is done in check_vm_args_consistency(). 453 * 454 * Over time -XX arguments may change. There are mechanisms to handle common cases: 455 * 456 * ALIASED: An option that is simply another name for another option. This is often 457 * part of the process of deprecating a flag, but not all aliases need 458 * to be deprecated. 459 * 460 * Create an alias for an option by adding the old and new option names to the 461 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc). 462 * 463 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that 464 * support may be removed in the future. Both regular and aliased options may be 465 * deprecated. 466 * 467 * Add a deprecation warning for an option (or alias) by adding an entry in the 468 * "special_jvm_flags" table and setting the "deprecated_in" field. 469 * Often an option "deprecated" in one major release will 470 * be made "obsolete" in the next. In this case the entry should also have its 471 * "obsolete_in" field set. 472 * 473 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted 474 * on the command line. A warning is printed to let the user know that option might not 475 * be accepted in the future. 476 * 477 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags" 478 * table and setting the "obsolete_in" field. 479 * 480 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal 481 * to the current JDK version. The system will flatly refuse to admit the existence of 482 * the flag. This allows a flag to die automatically over JDK releases. 483 * 484 * Note that manual cleanup of expired options should be done at major JDK version upgrades: 485 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables. 486 * - Newly obsolete or expired deprecated options should have their global variable 487 * definitions removed (from globals.hpp, etc) and related implementations removed. 488 * 489 * Recommended approach for removing options: 490 * 491 * To remove options commonly used by customers (e.g. product -XX options), use 492 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns. 493 * 494 * To remove internal options (e.g. diagnostic, experimental, develop options), use 495 * a 2-step model adding major release numbers to the obsolete and expire columns. 496 * 497 * To change the name of an option, use the alias table as well as a 2-step 498 * model adding major release numbers to the deprecate and expire columns. 499 * Think twice about aliasing commonly used customer options. 500 * 501 * There are times when it is appropriate to leave a future release number as undefined. 502 * 503 * Tests: Aliases should be tested in VMAliasOptions.java. 504 * Deprecated options should be tested in VMDeprecatedOptions.java. 505 */ 506 507 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The 508 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both. 509 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on 510 // the command-line as usual, but will issue a warning. 511 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on 512 // the command-line, while issuing a warning and ignoring the flag value. 513 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the 514 // existence of the flag. 515 // 516 // MANUAL CLEANUP ON JDK VERSION UPDATES: 517 // This table ensures that the handling of options will update automatically when the JDK 518 // version is incremented, but the source code needs to be cleanup up manually: 519 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals" 520 // variable should be removed, as well as users of the variable. 521 // - As "deprecated" options age into "obsolete" options, move the entry into the 522 // "Obsolete Flags" section of the table. 523 // - All expired options should be removed from the table. 524 static SpecialFlag const special_jvm_flags[] = { 525 // -------------- Deprecated Flags -------------- 526 // --- Non-alias flags - sorted by obsolete_in then expired_in: 527 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 528 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 529 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() }, 530 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() }, 531 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 532 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 533 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 534 { "UseMembar", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 535 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 536 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 537 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 538 { "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 539 540 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in: 541 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 542 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 543 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 544 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 545 546 // -------------- Obsolete Flags - sorted by expired_in -------------- 547 { "CheckAssertionStatusDirectives",JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 548 { "PrintMallocFree", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 549 { "PrintMalloc", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 550 { "ShowSafepointMsgs", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 551 { "FastTLABRefill", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 552 { "SafepointSpinBeforeYield", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 553 { "CheckEndorsedAndExtDirs", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 554 { "DeferThrSuspendLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 555 { "DeferPollingPageLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 556 { "TraceScavenge", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 557 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 558 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 559 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 560 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 561 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 562 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 563 { "UseUTCFileTimestamp", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 564 { "InlineNotify", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 565 { "EnableTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 566 { "UseLockedTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 567 { "NativeMonitorTimeout", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 568 { "NativeMonitorSpinLimit", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 569 { "NativeMonitorFlags", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 570 { "UnlinkSymbolsALot", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 571 { "AllowNonVirtualCalls", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 572 { "PrintSafepointStatistics", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 573 { "PrintSafepointStatisticsTimeout",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 574 { "PrintSafepointStatisticsCount", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 575 { "TransmitErrorReport", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 576 { "ErrorReportServer", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 577 { "EmitSync", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 578 { "SyncVerbose", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 579 580 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS 581 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() }, 582 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) }, 583 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) }, 584 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) }, 585 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 586 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 587 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() }, 588 #endif 589 590 { NULL, JDK_Version(0), JDK_Version(0) } 591 }; 592 593 // Flags that are aliases for other flags. 594 typedef struct { 595 const char* alias_name; 596 const char* real_name; 597 } AliasedFlag; 598 599 static AliasedFlag const aliased_jvm_flags[] = { 600 { "DefaultMaxRAMFraction", "MaxRAMFraction" }, 601 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" }, 602 { NULL, NULL} 603 }; 604 605 // NOTE: A compatibility request will be necessary for each alias to be removed. 606 static AliasedLoggingFlag const aliased_logging_flags[] = { 607 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) }, 608 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) }, 609 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) }, 610 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) }, 611 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) }, 612 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) }, 613 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) }, 614 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) }, 615 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) }, 616 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) }, 617 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) }, 618 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) }, 619 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) }, 620 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) }, 621 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) } 622 }; 623 624 #ifndef PRODUCT 625 // These options are removed in jdk9. Remove this code for jdk10. 626 static AliasedFlag const removed_develop_logging_flags[] = { 627 { "TraceClassInitialization", "-Xlog:class+init" }, 628 { "TraceClassLoaderData", "-Xlog:class+loader+data" }, 629 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" }, 630 { "TraceItables", "-Xlog:itables=debug" }, 631 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" }, 632 { "TraceSafepoint", "-Xlog:safepoint=debug" }, 633 { "TraceStartupTime", "-Xlog:startuptime" }, 634 { "TraceVMOperation", "-Xlog:vmoperation=debug" }, 635 { "PrintVtables", "-Xlog:vtables=debug" }, 636 { "VerboseVerification", "-Xlog:verification" }, 637 { NULL, NULL } 638 }; 639 #endif //PRODUCT 640 641 // Return true if "v" is less than "other", where "other" may be "undefined". 642 static bool version_less_than(JDK_Version v, JDK_Version other) { 643 assert(!v.is_undefined(), "must be defined"); 644 if (!other.is_undefined() && v.compare(other) >= 0) { 645 return false; 646 } else { 647 return true; 648 } 649 } 650 651 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag); 652 653 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) { 654 // Allow extensions to have priority 655 if (lookup_special_flag_ext(flag_name, flag)) { 656 return true; 657 } 658 659 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 660 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 661 flag = special_jvm_flags[i]; 662 return true; 663 } 664 } 665 return false; 666 } 667 668 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) { 669 assert(version != NULL, "Must provide a version buffer"); 670 SpecialFlag flag; 671 if (lookup_special_flag(flag_name, flag)) { 672 if (!flag.obsolete_in.is_undefined()) { 673 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 674 *version = flag.obsolete_in; 675 return true; 676 } 677 } 678 } 679 return false; 680 } 681 682 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) { 683 assert(version != NULL, "Must provide a version buffer"); 684 SpecialFlag flag; 685 if (lookup_special_flag(flag_name, flag)) { 686 if (!flag.deprecated_in.is_undefined()) { 687 if (version_less_than(JDK_Version::current(), flag.obsolete_in) && 688 version_less_than(JDK_Version::current(), flag.expired_in)) { 689 *version = flag.deprecated_in; 690 return 1; 691 } else { 692 return -1; 693 } 694 } 695 } 696 return 0; 697 } 698 699 #ifndef PRODUCT 700 const char* Arguments::removed_develop_logging_flag_name(const char* name){ 701 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) { 702 const AliasedFlag& flag = removed_develop_logging_flags[i]; 703 if (strcmp(flag.alias_name, name) == 0) { 704 return flag.real_name; 705 } 706 } 707 return NULL; 708 } 709 #endif // PRODUCT 710 711 const char* Arguments::real_flag_name(const char *flag_name) { 712 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) { 713 const AliasedFlag& flag_status = aliased_jvm_flags[i]; 714 if (strcmp(flag_status.alias_name, flag_name) == 0) { 715 return flag_status.real_name; 716 } 717 } 718 return flag_name; 719 } 720 721 #ifdef ASSERT 722 static bool lookup_special_flag(const char *flag_name, size_t skip_index) { 723 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 724 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 725 return true; 726 } 727 } 728 return false; 729 } 730 731 // Verifies the correctness of the entries in the special_jvm_flags table. 732 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion 733 // version being earlier than the deprecation version, then a warning is issued 734 // and verification fails - by returning false. If it is detected that the table 735 // is out of date, with respect to the current version, then a warning is issued 736 // but verification does not fail. This allows the VM to operate when the version 737 // is first updated, without needing to update all the impacted flags at the 738 // same time. 739 static bool verify_special_jvm_flags() { 740 bool success = true; 741 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 742 const SpecialFlag& flag = special_jvm_flags[i]; 743 if (lookup_special_flag(flag.name, i)) { 744 warning("Duplicate special flag declaration \"%s\"", flag.name); 745 success = false; 746 } 747 if (flag.deprecated_in.is_undefined() && 748 flag.obsolete_in.is_undefined()) { 749 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name); 750 success = false; 751 } 752 753 if (!flag.deprecated_in.is_undefined()) { 754 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) { 755 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name); 756 success = false; 757 } 758 759 if (!version_less_than(flag.deprecated_in, flag.expired_in)) { 760 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name); 761 success = false; 762 } 763 } 764 765 if (!flag.obsolete_in.is_undefined()) { 766 if (!version_less_than(flag.obsolete_in, flag.expired_in)) { 767 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name); 768 success = false; 769 } 770 771 // if flag has become obsolete it should not have a "globals" flag defined anymore. 772 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 773 if (JVMFlag::find_flag(flag.name) != NULL) { 774 // Temporarily disable the warning: 8196739 775 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name); 776 } 777 } 778 } 779 780 if (!flag.expired_in.is_undefined()) { 781 // if flag has become expired it should not have a "globals" flag defined anymore. 782 if (!version_less_than(JDK_Version::current(), flag.expired_in)) { 783 if (JVMFlag::find_flag(flag.name) != NULL) { 784 // Temporarily disable the warning: 8196739 785 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name); 786 } 787 } 788 } 789 790 } 791 return success; 792 } 793 #endif 794 795 // Parses a size specification string. 796 bool Arguments::atojulong(const char *s, julong* result) { 797 julong n = 0; 798 799 // First char must be a digit. Don't allow negative numbers or leading spaces. 800 if (!isdigit(*s)) { 801 return false; 802 } 803 804 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); 805 char* remainder; 806 errno = 0; 807 n = strtoull(s, &remainder, (is_hex ? 16 : 10)); 808 if (errno != 0) { 809 return false; 810 } 811 812 // Fail if no number was read at all or if the remainder contains more than a single non-digit character. 813 if (remainder == s || strlen(remainder) > 1) { 814 return false; 815 } 816 817 switch (*remainder) { 818 case 'T': case 't': 819 *result = n * G * K; 820 // Check for overflow. 821 if (*result/((julong)G * K) != n) return false; 822 return true; 823 case 'G': case 'g': 824 *result = n * G; 825 if (*result/G != n) return false; 826 return true; 827 case 'M': case 'm': 828 *result = n * M; 829 if (*result/M != n) return false; 830 return true; 831 case 'K': case 'k': 832 *result = n * K; 833 if (*result/K != n) return false; 834 return true; 835 case '\0': 836 *result = n; 837 return true; 838 default: 839 return false; 840 } 841 } 842 843 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) { 844 if (size < min_size) return arg_too_small; 845 if (size > max_size) return arg_too_big; 846 return arg_in_range; 847 } 848 849 // Describe an argument out of range error 850 void Arguments::describe_range_error(ArgsRange errcode) { 851 switch(errcode) { 852 case arg_too_big: 853 jio_fprintf(defaultStream::error_stream(), 854 "The specified size exceeds the maximum " 855 "representable size.\n"); 856 break; 857 case arg_too_small: 858 case arg_unreadable: 859 case arg_in_range: 860 // do nothing for now 861 break; 862 default: 863 ShouldNotReachHere(); 864 } 865 } 866 867 static bool set_bool_flag(const char* name, bool value, JVMFlag::Flags origin) { 868 if (JVMFlag::boolAtPut(name, &value, origin) == JVMFlag::SUCCESS) { 869 return true; 870 } else { 871 return false; 872 } 873 } 874 875 static bool set_fp_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) { 876 char* end; 877 errno = 0; 878 double v = strtod(value, &end); 879 if ((errno != 0) || (*end != 0)) { 880 return false; 881 } 882 883 if (JVMFlag::doubleAtPut(name, &v, origin) == JVMFlag::SUCCESS) { 884 return true; 885 } 886 return false; 887 } 888 889 static bool set_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) { 890 julong v; 891 int int_v; 892 intx intx_v; 893 bool is_neg = false; 894 JVMFlag* result = JVMFlag::find_flag(name, strlen(name)); 895 896 if (result == NULL) { 897 return false; 898 } 899 900 // Check the sign first since atojulong() parses only unsigned values. 901 if (*value == '-') { 902 if (!result->is_intx() && !result->is_int()) { 903 return false; 904 } 905 value++; 906 is_neg = true; 907 } 908 if (!Arguments::atojulong(value, &v)) { 909 return false; 910 } 911 if (result->is_int()) { 912 int_v = (int) v; 913 if (is_neg) { 914 int_v = -int_v; 915 } 916 return JVMFlag::intAtPut(result, &int_v, origin) == JVMFlag::SUCCESS; 917 } else if (result->is_uint()) { 918 uint uint_v = (uint) v; 919 return JVMFlag::uintAtPut(result, &uint_v, origin) == JVMFlag::SUCCESS; 920 } else if (result->is_intx()) { 921 intx_v = (intx) v; 922 if (is_neg) { 923 intx_v = -intx_v; 924 } 925 return JVMFlag::intxAtPut(result, &intx_v, origin) == JVMFlag::SUCCESS; 926 } else if (result->is_uintx()) { 927 uintx uintx_v = (uintx) v; 928 return JVMFlag::uintxAtPut(result, &uintx_v, origin) == JVMFlag::SUCCESS; 929 } else if (result->is_uint64_t()) { 930 uint64_t uint64_t_v = (uint64_t) v; 931 return JVMFlag::uint64_tAtPut(result, &uint64_t_v, origin) == JVMFlag::SUCCESS; 932 } else if (result->is_size_t()) { 933 size_t size_t_v = (size_t) v; 934 return JVMFlag::size_tAtPut(result, &size_t_v, origin) == JVMFlag::SUCCESS; 935 } else if (result->is_double()) { 936 double double_v = (double) v; 937 return JVMFlag::doubleAtPut(result, &double_v, origin) == JVMFlag::SUCCESS; 938 } else { 939 return false; 940 } 941 } 942 943 static bool set_string_flag(const char* name, const char* value, JVMFlag::Flags origin) { 944 if (JVMFlag::ccstrAtPut(name, &value, origin) != JVMFlag::SUCCESS) return false; 945 // Contract: JVMFlag always returns a pointer that needs freeing. 946 FREE_C_HEAP_ARRAY(char, value); 947 return true; 948 } 949 950 static bool append_to_string_flag(const char* name, const char* new_value, JVMFlag::Flags origin) { 951 const char* old_value = ""; 952 if (JVMFlag::ccstrAt(name, &old_value) != JVMFlag::SUCCESS) return false; 953 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 954 size_t new_len = strlen(new_value); 955 const char* value; 956 char* free_this_too = NULL; 957 if (old_len == 0) { 958 value = new_value; 959 } else if (new_len == 0) { 960 value = old_value; 961 } else { 962 size_t length = old_len + 1 + new_len + 1; 963 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments); 964 // each new setting adds another LINE to the switch: 965 jio_snprintf(buf, length, "%s\n%s", old_value, new_value); 966 value = buf; 967 free_this_too = buf; 968 } 969 (void) JVMFlag::ccstrAtPut(name, &value, origin); 970 // JVMFlag always returns a pointer that needs freeing. 971 FREE_C_HEAP_ARRAY(char, value); 972 if (free_this_too != NULL) { 973 // JVMFlag made its own copy, so I must delete my own temp. buffer. 974 FREE_C_HEAP_ARRAY(char, free_this_too); 975 } 976 return true; 977 } 978 979 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) { 980 const char* real_name = real_flag_name(arg); 981 JDK_Version since = JDK_Version(); 982 switch (is_deprecated_flag(arg, &since)) { 983 case -1: 984 return NULL; // obsolete or expired, don't process normally 985 case 0: 986 return real_name; 987 case 1: { 988 if (warn) { 989 char version[256]; 990 since.to_string(version, sizeof(version)); 991 if (real_name != arg) { 992 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.", 993 arg, version, real_name); 994 } else { 995 warning("Option %s was deprecated in version %s and will likely be removed in a future release.", 996 arg, version); 997 } 998 } 999 return real_name; 1000 } 1001 } 1002 ShouldNotReachHere(); 1003 return NULL; 1004 } 1005 1006 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) { 1007 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5}; 1008 // Set tagset string buffer at max size of 256, large enough for any alias tagset 1009 const int max_tagset_size = 256; 1010 int max_tagset_len = max_tagset_size - 1; 1011 char tagset_buffer[max_tagset_size]; 1012 tagset_buffer[0] = '\0'; 1013 1014 // Write tag-set for aliased logging option, in string list form 1015 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]); 1016 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) { 1017 if (i > 0) { 1018 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer)); 1019 } 1020 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer)); 1021 } 1022 if (!alf.exactMatch) { 1023 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer)); 1024 } 1025 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.", 1026 (on) ? "+" : "-", 1027 name, 1028 tagset_buffer, 1029 (on) ? LogLevel::name(alf.level) : "off"); 1030 } 1031 1032 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){ 1033 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) { 1034 const AliasedLoggingFlag& alf = aliased_logging_flags[i]; 1035 if (strcmp(alf.alias_name, name) == 0) { 1036 log_deprecated_flag(name, on, alf); 1037 return alf; 1038 } 1039 } 1040 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)}; 1041 return a; 1042 } 1043 1044 bool Arguments::parse_argument(const char* arg, JVMFlag::Flags origin) { 1045 1046 // range of acceptable characters spelled out for portability reasons 1047 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 1048 #define BUFLEN 255 1049 char name[BUFLEN+1]; 1050 char dummy; 1051 const char* real_name; 1052 bool warn_if_deprecated = true; 1053 1054 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 1055 AliasedLoggingFlag alf = catch_logging_aliases(name, false); 1056 if (alf.alias_name != NULL){ 1057 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1058 return true; 1059 } 1060 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1061 if (real_name == NULL) { 1062 return false; 1063 } 1064 return set_bool_flag(real_name, false, origin); 1065 } 1066 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 1067 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 1068 if (alf.alias_name != NULL){ 1069 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1070 return true; 1071 } 1072 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1073 if (real_name == NULL) { 1074 return false; 1075 } 1076 return set_bool_flag(real_name, true, origin); 1077 } 1078 1079 char punct; 1080 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 1081 const char* value = strchr(arg, '=') + 1; 1082 JVMFlag* flag; 1083 1084 // this scanf pattern matches both strings (handled here) and numbers (handled later)) 1085 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 1086 if (alf.alias_name != NULL) { 1087 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1088 return true; 1089 } 1090 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1091 if (real_name == NULL) { 1092 return false; 1093 } 1094 flag = JVMFlag::find_flag(real_name); 1095 if (flag != NULL && flag->is_ccstr()) { 1096 if (flag->ccstr_accumulates()) { 1097 return append_to_string_flag(real_name, value, origin); 1098 } else { 1099 if (value[0] == '\0') { 1100 value = NULL; 1101 } 1102 return set_string_flag(real_name, value, origin); 1103 } 1104 } else { 1105 warn_if_deprecated = false; // if arg is deprecated, we've already done warning... 1106 } 1107 } 1108 1109 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 1110 const char* value = strchr(arg, '=') + 1; 1111 // -XX:Foo:=xxx will reset the string flag to the given value. 1112 if (value[0] == '\0') { 1113 value = NULL; 1114 } 1115 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1116 if (real_name == NULL) { 1117 return false; 1118 } 1119 return set_string_flag(real_name, value, origin); 1120 } 1121 1122 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]" 1123 #define SIGNED_NUMBER_RANGE "[-0123456789]" 1124 #define NUMBER_RANGE "[0123456789eE+-]" 1125 char value[BUFLEN + 1]; 1126 char value2[BUFLEN + 1]; 1127 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 1128 // Looks like a floating-point number -- try again with more lenient format string 1129 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 1130 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1131 if (real_name == NULL) { 1132 return false; 1133 } 1134 return set_fp_numeric_flag(real_name, value, origin); 1135 } 1136 } 1137 1138 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 1139 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 1140 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1141 if (real_name == NULL) { 1142 return false; 1143 } 1144 return set_numeric_flag(real_name, value, origin); 1145 } 1146 1147 return false; 1148 } 1149 1150 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 1151 assert(bldarray != NULL, "illegal argument"); 1152 1153 if (arg == NULL) { 1154 return; 1155 } 1156 1157 int new_count = *count + 1; 1158 1159 // expand the array and add arg to the last element 1160 if (*bldarray == NULL) { 1161 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments); 1162 } else { 1163 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments); 1164 } 1165 (*bldarray)[*count] = os::strdup_check_oom(arg); 1166 *count = new_count; 1167 } 1168 1169 void Arguments::build_jvm_args(const char* arg) { 1170 add_string(&_jvm_args_array, &_num_jvm_args, arg); 1171 } 1172 1173 void Arguments::build_jvm_flags(const char* arg) { 1174 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 1175 } 1176 1177 // utility function to return a string that concatenates all 1178 // strings in a given char** array 1179 const char* Arguments::build_resource_string(char** args, int count) { 1180 if (args == NULL || count == 0) { 1181 return NULL; 1182 } 1183 size_t length = 0; 1184 for (int i = 0; i < count; i++) { 1185 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character 1186 } 1187 char* s = NEW_RESOURCE_ARRAY(char, length); 1188 char* dst = s; 1189 for (int j = 0; j < count; j++) { 1190 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character 1191 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character 1192 dst += offset; 1193 length -= offset; 1194 } 1195 return (const char*) s; 1196 } 1197 1198 void Arguments::print_on(outputStream* st) { 1199 st->print_cr("VM Arguments:"); 1200 if (num_jvm_flags() > 0) { 1201 st->print("jvm_flags: "); print_jvm_flags_on(st); 1202 st->cr(); 1203 } 1204 if (num_jvm_args() > 0) { 1205 st->print("jvm_args: "); print_jvm_args_on(st); 1206 st->cr(); 1207 } 1208 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 1209 if (_java_class_path != NULL) { 1210 char* path = _java_class_path->value(); 1211 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 1212 } 1213 st->print_cr("Launcher Type: %s", _sun_java_launcher); 1214 } 1215 1216 void Arguments::print_summary_on(outputStream* st) { 1217 // Print the command line. Environment variables that are helpful for 1218 // reproducing the problem are written later in the hs_err file. 1219 // flags are from setting file 1220 if (num_jvm_flags() > 0) { 1221 st->print_raw("Settings File: "); 1222 print_jvm_flags_on(st); 1223 st->cr(); 1224 } 1225 // args are the command line and environment variable arguments. 1226 st->print_raw("Command Line: "); 1227 if (num_jvm_args() > 0) { 1228 print_jvm_args_on(st); 1229 } 1230 // this is the classfile and any arguments to the java program 1231 if (java_command() != NULL) { 1232 st->print("%s", java_command()); 1233 } 1234 st->cr(); 1235 } 1236 1237 void Arguments::print_jvm_flags_on(outputStream* st) { 1238 if (_num_jvm_flags > 0) { 1239 for (int i=0; i < _num_jvm_flags; i++) { 1240 st->print("%s ", _jvm_flags_array[i]); 1241 } 1242 } 1243 } 1244 1245 void Arguments::print_jvm_args_on(outputStream* st) { 1246 if (_num_jvm_args > 0) { 1247 for (int i=0; i < _num_jvm_args; i++) { 1248 st->print("%s ", _jvm_args_array[i]); 1249 } 1250 } 1251 } 1252 1253 bool Arguments::process_argument(const char* arg, 1254 jboolean ignore_unrecognized, 1255 JVMFlag::Flags origin) { 1256 JDK_Version since = JDK_Version(); 1257 1258 if (parse_argument(arg, origin)) { 1259 return true; 1260 } 1261 1262 // Determine if the flag has '+', '-', or '=' characters. 1263 bool has_plus_minus = (*arg == '+' || *arg == '-'); 1264 const char* const argname = has_plus_minus ? arg + 1 : arg; 1265 1266 size_t arg_len; 1267 const char* equal_sign = strchr(argname, '='); 1268 if (equal_sign == NULL) { 1269 arg_len = strlen(argname); 1270 } else { 1271 arg_len = equal_sign - argname; 1272 } 1273 1274 // Only make the obsolete check for valid arguments. 1275 if (arg_len <= BUFLEN) { 1276 // Construct a string which consists only of the argument name without '+', '-', or '='. 1277 char stripped_argname[BUFLEN+1]; // +1 for '\0' 1278 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0' 1279 if (is_obsolete_flag(stripped_argname, &since)) { 1280 char version[256]; 1281 since.to_string(version, sizeof(version)); 1282 warning("Ignoring option %s; support was removed in %s", stripped_argname, version); 1283 return true; 1284 } 1285 #ifndef PRODUCT 1286 else { 1287 const char* replacement; 1288 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){ 1289 log_warning(arguments)("%s has been removed. Please use %s instead.", 1290 stripped_argname, 1291 replacement); 1292 return false; 1293 } 1294 } 1295 #endif //PRODUCT 1296 } 1297 1298 // For locked flags, report a custom error message if available. 1299 // Otherwise, report the standard unrecognized VM option. 1300 JVMFlag* found_flag = JVMFlag::find_flag((const char*)argname, arg_len, true, true); 1301 if (found_flag != NULL) { 1302 char locked_message_buf[BUFLEN]; 1303 JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN); 1304 if (strlen(locked_message_buf) == 0) { 1305 if (found_flag->is_bool() && !has_plus_minus) { 1306 jio_fprintf(defaultStream::error_stream(), 1307 "Missing +/- setting for VM option '%s'\n", argname); 1308 } else if (!found_flag->is_bool() && has_plus_minus) { 1309 jio_fprintf(defaultStream::error_stream(), 1310 "Unexpected +/- setting in VM option '%s'\n", argname); 1311 } else { 1312 jio_fprintf(defaultStream::error_stream(), 1313 "Improperly specified VM option '%s'\n", argname); 1314 } 1315 } else { 1316 #ifdef PRODUCT 1317 bool mismatched = ((msg_type == JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) || 1318 (msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD)); 1319 if (ignore_unrecognized && mismatched) { 1320 return true; 1321 } 1322 #endif 1323 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 1324 } 1325 } else { 1326 if (ignore_unrecognized) { 1327 return true; 1328 } 1329 jio_fprintf(defaultStream::error_stream(), 1330 "Unrecognized VM option '%s'\n", argname); 1331 JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true); 1332 if (fuzzy_matched != NULL) { 1333 jio_fprintf(defaultStream::error_stream(), 1334 "Did you mean '%s%s%s'? ", 1335 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 1336 fuzzy_matched->_name, 1337 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 1338 } 1339 } 1340 1341 // allow for commandline "commenting out" options like -XX:#+Verbose 1342 return arg[0] == '#'; 1343 } 1344 1345 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 1346 FILE* stream = fopen(file_name, "rb"); 1347 if (stream == NULL) { 1348 if (should_exist) { 1349 jio_fprintf(defaultStream::error_stream(), 1350 "Could not open settings file %s\n", file_name); 1351 return false; 1352 } else { 1353 return true; 1354 } 1355 } 1356 1357 char token[1024]; 1358 int pos = 0; 1359 1360 bool in_white_space = true; 1361 bool in_comment = false; 1362 bool in_quote = false; 1363 char quote_c = 0; 1364 bool result = true; 1365 1366 int c = getc(stream); 1367 while(c != EOF && pos < (int)(sizeof(token)-1)) { 1368 if (in_white_space) { 1369 if (in_comment) { 1370 if (c == '\n') in_comment = false; 1371 } else { 1372 if (c == '#') in_comment = true; 1373 else if (!isspace(c)) { 1374 in_white_space = false; 1375 token[pos++] = c; 1376 } 1377 } 1378 } else { 1379 if (c == '\n' || (!in_quote && isspace(c))) { 1380 // token ends at newline, or at unquoted whitespace 1381 // this allows a way to include spaces in string-valued options 1382 token[pos] = '\0'; 1383 logOption(token); 1384 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE); 1385 build_jvm_flags(token); 1386 pos = 0; 1387 in_white_space = true; 1388 in_quote = false; 1389 } else if (!in_quote && (c == '\'' || c == '"')) { 1390 in_quote = true; 1391 quote_c = c; 1392 } else if (in_quote && (c == quote_c)) { 1393 in_quote = false; 1394 } else { 1395 token[pos++] = c; 1396 } 1397 } 1398 c = getc(stream); 1399 } 1400 if (pos > 0) { 1401 token[pos] = '\0'; 1402 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE); 1403 build_jvm_flags(token); 1404 } 1405 fclose(stream); 1406 return result; 1407 } 1408 1409 //============================================================================================================= 1410 // Parsing of properties (-D) 1411 1412 const char* Arguments::get_property(const char* key) { 1413 return PropertyList_get_value(system_properties(), key); 1414 } 1415 1416 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) { 1417 const char* eq = strchr(prop, '='); 1418 const char* key; 1419 const char* value = ""; 1420 1421 if (eq == NULL) { 1422 // property doesn't have a value, thus use passed string 1423 key = prop; 1424 } else { 1425 // property have a value, thus extract it and save to the 1426 // allocated string 1427 size_t key_len = eq - prop; 1428 char* tmp_key = AllocateHeap(key_len + 1, mtArguments); 1429 1430 jio_snprintf(tmp_key, key_len + 1, "%s", prop); 1431 key = tmp_key; 1432 1433 value = &prop[key_len + 1]; 1434 } 1435 1436 if (strcmp(key, "java.compiler") == 0) { 1437 process_java_compiler_argument(value); 1438 // Record value in Arguments, but let it get passed to Java. 1439 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 1440 strcmp(key, "sun.java.launcher.pid") == 0) { 1441 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1442 // private and are processed in process_sun_java_launcher_properties(); 1443 // the sun.java.launcher property is passed on to the java application 1444 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1445 // append is true, writable is true, internal is false 1446 PropertyList_unique_add(&_system_properties, key, value, AppendProperty, 1447 WriteableProperty, ExternalProperty); 1448 } else { 1449 if (strcmp(key, "sun.java.command") == 0) { 1450 char *old_java_command = _java_command; 1451 _java_command = os::strdup_check_oom(value, mtArguments); 1452 if (old_java_command != NULL) { 1453 os::free(old_java_command); 1454 } 1455 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1456 const char* old_java_vendor_url_bug = _java_vendor_url_bug; 1457 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1458 // its value without going through the property list or making a Java call. 1459 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments); 1460 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) { 1461 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL"); 1462 os::free((void *)old_java_vendor_url_bug); 1463 } 1464 } 1465 1466 // Create new property and add at the end of the list 1467 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal); 1468 } 1469 1470 if (key != prop) { 1471 // SystemProperty copy passed value, thus free previously allocated 1472 // memory 1473 FreeHeap((void *)key); 1474 } 1475 1476 return true; 1477 } 1478 1479 #if INCLUDE_CDS 1480 const char* unsupported_properties[] = { "jdk.module.limitmods", 1481 "jdk.module.upgrade.path", 1482 "jdk.module.patch.0" }; 1483 const char* unsupported_options[] = { "--limit-modules", 1484 "--upgrade-module-path", 1485 "--patch-module" 1486 }; 1487 void Arguments::check_unsupported_dumping_properties() { 1488 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump"); 1489 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be"); 1490 // If a vm option is found in the unsupported_options array, vm will exit with an error message. 1491 SystemProperty* sp = system_properties(); 1492 while (sp != NULL) { 1493 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) { 1494 if (strcmp(sp->key(), unsupported_properties[i]) == 0) { 1495 vm_exit_during_initialization( 1496 "Cannot use the following option when dumping the shared archive", unsupported_options[i]); 1497 } 1498 } 1499 sp = sp->next(); 1500 } 1501 1502 // Check for an exploded module build in use with -Xshare:dump. 1503 if (!has_jimage()) { 1504 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build"); 1505 } 1506 } 1507 1508 bool Arguments::check_unsupported_cds_runtime_properties() { 1509 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}"); 1510 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be"); 1511 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) { 1512 if (get_property(unsupported_properties[i]) != NULL) { 1513 if (RequireSharedSpaces) { 1514 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]); 1515 } 1516 return true; 1517 } 1518 } 1519 return false; 1520 } 1521 #endif 1522 1523 //=========================================================================================================== 1524 // Setting int/mixed/comp mode flags 1525 1526 void Arguments::set_mode_flags(Mode mode) { 1527 // Set up default values for all flags. 1528 // If you add a flag to any of the branches below, 1529 // add a default value for it here. 1530 set_java_compiler(false); 1531 _mode = mode; 1532 1533 // Ensure Agent_OnLoad has the correct initial values. 1534 // This may not be the final mode; mode may change later in onload phase. 1535 PropertyList_unique_add(&_system_properties, "java.vm.info", 1536 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty); 1537 1538 UseInterpreter = true; 1539 UseCompiler = true; 1540 UseLoopCounter = true; 1541 1542 // Default values may be platform/compiler dependent - 1543 // use the saved values 1544 ClipInlining = Arguments::_ClipInlining; 1545 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1546 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1547 BackgroundCompilation = Arguments::_BackgroundCompilation; 1548 if (TieredCompilation) { 1549 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) { 1550 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog; 1551 } 1552 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) { 1553 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold; 1554 } 1555 } 1556 1557 // Change from defaults based on mode 1558 switch (mode) { 1559 default: 1560 ShouldNotReachHere(); 1561 break; 1562 case _int: 1563 UseCompiler = false; 1564 UseLoopCounter = false; 1565 AlwaysCompileLoopMethods = false; 1566 UseOnStackReplacement = false; 1567 break; 1568 case _mixed: 1569 // same as default 1570 break; 1571 case _comp: 1572 UseInterpreter = false; 1573 BackgroundCompilation = false; 1574 ClipInlining = false; 1575 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1576 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1577 // compile a level 4 (C2) and then continue executing it. 1578 if (TieredCompilation) { 1579 Tier3InvokeNotifyFreqLog = 0; 1580 Tier4InvocationThreshold = 0; 1581 } 1582 break; 1583 } 1584 } 1585 1586 // Conflict: required to use shared spaces (-Xshare:on), but 1587 // incompatible command line options were chosen. 1588 static void no_shared_spaces(const char* message) { 1589 if (RequireSharedSpaces) { 1590 jio_fprintf(defaultStream::error_stream(), 1591 "Class data sharing is inconsistent with other specified options.\n"); 1592 vm_exit_during_initialization("Unable to use shared archive", message); 1593 } else { 1594 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1595 } 1596 } 1597 1598 void set_object_alignment() { 1599 // Object alignment. 1600 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1601 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1602 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1603 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1604 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1605 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1606 1607 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1608 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1609 1610 // Oop encoding heap max 1611 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1612 1613 if (SurvivorAlignmentInBytes == 0) { 1614 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1615 } 1616 } 1617 1618 size_t Arguments::max_heap_for_compressed_oops() { 1619 // Avoid sign flip. 1620 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1621 // We need to fit both the NULL page and the heap into the memory budget, while 1622 // keeping alignment constraints of the heap. To guarantee the latter, as the 1623 // NULL page is located before the heap, we pad the NULL page to the conservative 1624 // maximum alignment that the GC may ever impose upon the heap. 1625 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(), 1626 _conservative_max_heap_alignment); 1627 1628 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1629 NOT_LP64(ShouldNotReachHere(); return 0); 1630 } 1631 1632 void Arguments::set_use_compressed_oops() { 1633 #ifndef ZERO 1634 #ifdef _LP64 1635 // MaxHeapSize is not set up properly at this point, but 1636 // the only value that can override MaxHeapSize if we are 1637 // to use UseCompressedOops is InitialHeapSize. 1638 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1639 1640 if (max_heap_size <= max_heap_for_compressed_oops()) { 1641 #if !defined(COMPILER1) || defined(TIERED) 1642 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1643 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1644 } 1645 #endif 1646 } else { 1647 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1648 warning("Max heap size too large for Compressed Oops"); 1649 FLAG_SET_DEFAULT(UseCompressedOops, false); 1650 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1651 } 1652 } 1653 #endif // _LP64 1654 #endif // ZERO 1655 } 1656 1657 1658 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1659 // set_use_compressed_oops(). 1660 void Arguments::set_use_compressed_klass_ptrs() { 1661 #ifndef ZERO 1662 #ifdef _LP64 1663 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1664 if (!UseCompressedOops) { 1665 if (UseCompressedClassPointers) { 1666 warning("UseCompressedClassPointers requires UseCompressedOops"); 1667 } 1668 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1669 } else { 1670 // Turn on UseCompressedClassPointers too 1671 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1672 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1673 } 1674 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1675 if (UseCompressedClassPointers) { 1676 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1677 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1678 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1679 } 1680 } 1681 } 1682 #endif // _LP64 1683 #endif // !ZERO 1684 } 1685 1686 void Arguments::set_conservative_max_heap_alignment() { 1687 // The conservative maximum required alignment for the heap is the maximum of 1688 // the alignments imposed by several sources: any requirements from the heap 1689 // itself, the collector policy and the maximum page size we may run the VM 1690 // with. 1691 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment(); 1692 _conservative_max_heap_alignment = MAX4(heap_alignment, 1693 (size_t)os::vm_allocation_granularity(), 1694 os::max_page_size(), 1695 CollectorPolicy::compute_heap_alignment()); 1696 } 1697 1698 jint Arguments::set_ergonomics_flags() { 1699 GCConfig::initialize(); 1700 1701 set_conservative_max_heap_alignment(); 1702 1703 #ifndef ZERO 1704 #ifdef _LP64 1705 set_use_compressed_oops(); 1706 1707 // set_use_compressed_klass_ptrs() must be called after calling 1708 // set_use_compressed_oops(). 1709 set_use_compressed_klass_ptrs(); 1710 1711 // Also checks that certain machines are slower with compressed oops 1712 // in vm_version initialization code. 1713 #endif // _LP64 1714 #endif // !ZERO 1715 1716 return JNI_OK; 1717 } 1718 1719 julong Arguments::limit_by_allocatable_memory(julong limit) { 1720 julong max_allocatable; 1721 julong result = limit; 1722 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1723 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1724 } 1725 return result; 1726 } 1727 1728 // Use static initialization to get the default before parsing 1729 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1730 1731 void Arguments::set_heap_size() { 1732 julong phys_mem = 1733 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1734 : (julong)MaxRAM; 1735 1736 // Convert deprecated flags 1737 if (FLAG_IS_DEFAULT(MaxRAMPercentage) && 1738 !FLAG_IS_DEFAULT(MaxRAMFraction)) 1739 MaxRAMPercentage = 100.0 / MaxRAMFraction; 1740 1741 if (FLAG_IS_DEFAULT(MinRAMPercentage) && 1742 !FLAG_IS_DEFAULT(MinRAMFraction)) 1743 MinRAMPercentage = 100.0 / MinRAMFraction; 1744 1745 if (FLAG_IS_DEFAULT(InitialRAMPercentage) && 1746 !FLAG_IS_DEFAULT(InitialRAMFraction)) 1747 InitialRAMPercentage = 100.0 / InitialRAMFraction; 1748 1749 // If the maximum heap size has not been set with -Xmx, 1750 // then set it as fraction of the size of physical memory, 1751 // respecting the maximum and minimum sizes of the heap. 1752 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1753 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100); 1754 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100); 1755 if (reasonable_min < MaxHeapSize) { 1756 // Small physical memory, so use a minimum fraction of it for the heap 1757 reasonable_max = reasonable_min; 1758 } else { 1759 // Not-small physical memory, so require a heap at least 1760 // as large as MaxHeapSize 1761 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 1762 } 1763 1764 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 1765 // Limit the heap size to ErgoHeapSizeLimit 1766 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 1767 } 1768 if (UseCompressedOops) { 1769 // Limit the heap size to the maximum possible when using compressed oops 1770 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 1771 1772 // HeapBaseMinAddress can be greater than default but not less than. 1773 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 1774 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 1775 // matches compressed oops printing flags 1776 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT 1777 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT, 1778 DefaultHeapBaseMinAddress, 1779 DefaultHeapBaseMinAddress/G, 1780 HeapBaseMinAddress); 1781 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 1782 } 1783 } 1784 1785 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 1786 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 1787 // but it should be not less than default MaxHeapSize. 1788 max_coop_heap -= HeapBaseMinAddress; 1789 } 1790 reasonable_max = MIN2(reasonable_max, max_coop_heap); 1791 } 1792 reasonable_max = limit_by_allocatable_memory(reasonable_max); 1793 1794 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 1795 // An initial heap size was specified on the command line, 1796 // so be sure that the maximum size is consistent. Done 1797 // after call to limit_by_allocatable_memory because that 1798 // method might reduce the allocation size. 1799 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 1800 } 1801 1802 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 1803 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max); 1804 } 1805 1806 // If the minimum or initial heap_size have not been set or requested to be set 1807 // ergonomically, set them accordingly. 1808 if (InitialHeapSize == 0 || min_heap_size() == 0) { 1809 julong reasonable_minimum = (julong)(OldSize + NewSize); 1810 1811 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 1812 1813 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 1814 1815 if (InitialHeapSize == 0) { 1816 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100); 1817 1818 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 1819 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 1820 1821 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 1822 1823 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial); 1824 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial); 1825 } 1826 // If the minimum heap size has not been set (via -Xms), 1827 // synchronize with InitialHeapSize to avoid errors with the default value. 1828 if (min_heap_size() == 0) { 1829 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize)); 1830 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 1831 } 1832 } 1833 } 1834 1835 // This option inspects the machine and attempts to set various 1836 // parameters to be optimal for long-running, memory allocation 1837 // intensive jobs. It is intended for machines with large 1838 // amounts of cpu and memory. 1839 jint Arguments::set_aggressive_heap_flags() { 1840 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 1841 // VM, but we may not be able to represent the total physical memory 1842 // available (like having 8gb of memory on a box but using a 32bit VM). 1843 // Thus, we need to make sure we're using a julong for intermediate 1844 // calculations. 1845 julong initHeapSize; 1846 julong total_memory = os::physical_memory(); 1847 1848 if (total_memory < (julong) 256 * M) { 1849 jio_fprintf(defaultStream::error_stream(), 1850 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 1851 vm_exit(1); 1852 } 1853 1854 // The heap size is half of available memory, or (at most) 1855 // all of possible memory less 160mb (leaving room for the OS 1856 // when using ISM). This is the maximum; because adaptive sizing 1857 // is turned on below, the actual space used may be smaller. 1858 1859 initHeapSize = MIN2(total_memory / (julong) 2, 1860 total_memory - (julong) 160 * M); 1861 1862 initHeapSize = limit_by_allocatable_memory(initHeapSize); 1863 1864 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1865 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) { 1866 return JNI_EINVAL; 1867 } 1868 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) { 1869 return JNI_EINVAL; 1870 } 1871 // Currently the minimum size and the initial heap sizes are the same. 1872 set_min_heap_size(initHeapSize); 1873 } 1874 if (FLAG_IS_DEFAULT(NewSize)) { 1875 // Make the young generation 3/8ths of the total heap. 1876 if (FLAG_SET_CMDLINE(size_t, NewSize, 1877 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) { 1878 return JNI_EINVAL; 1879 } 1880 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != JVMFlag::SUCCESS) { 1881 return JNI_EINVAL; 1882 } 1883 } 1884 1885 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 1886 FLAG_SET_DEFAULT(UseLargePages, true); 1887 #endif 1888 1889 // Increase some data structure sizes for efficiency 1890 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != JVMFlag::SUCCESS) { 1891 return JNI_EINVAL; 1892 } 1893 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != JVMFlag::SUCCESS) { 1894 return JNI_EINVAL; 1895 } 1896 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != JVMFlag::SUCCESS) { 1897 return JNI_EINVAL; 1898 } 1899 1900 // See the OldPLABSize comment below, but replace 'after promotion' 1901 // with 'after copying'. YoungPLABSize is the size of the survivor 1902 // space per-gc-thread buffers. The default is 4kw. 1903 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words 1904 return JNI_EINVAL; 1905 } 1906 1907 // OldPLABSize is the size of the buffers in the old gen that 1908 // UseParallelGC uses to promote live data that doesn't fit in the 1909 // survivor spaces. At any given time, there's one for each gc thread. 1910 // The default size is 1kw. These buffers are rarely used, since the 1911 // survivor spaces are usually big enough. For specjbb, however, there 1912 // are occasions when there's lots of live data in the young gen 1913 // and we end up promoting some of it. We don't have a definite 1914 // explanation for why bumping OldPLABSize helps, but the theory 1915 // is that a bigger PLAB results in retaining something like the 1916 // original allocation order after promotion, which improves mutator 1917 // locality. A minor effect may be that larger PLABs reduce the 1918 // number of PLAB allocation events during gc. The value of 8kw 1919 // was arrived at by experimenting with specjbb. 1920 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words 1921 return JNI_EINVAL; 1922 } 1923 1924 // Enable parallel GC and adaptive generation sizing 1925 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != JVMFlag::SUCCESS) { 1926 return JNI_EINVAL; 1927 } 1928 1929 // Encourage steady state memory management 1930 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != JVMFlag::SUCCESS) { 1931 return JNI_EINVAL; 1932 } 1933 1934 // This appears to improve mutator locality 1935 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) { 1936 return JNI_EINVAL; 1937 } 1938 1939 // Get around early Solaris scheduling bug 1940 // (affinity vs other jobs on system) 1941 // but disallow DR and offlining (5008695). 1942 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != JVMFlag::SUCCESS) { 1943 return JNI_EINVAL; 1944 } 1945 1946 return JNI_OK; 1947 } 1948 1949 // This must be called after ergonomics. 1950 void Arguments::set_bytecode_flags() { 1951 if (!RewriteBytecodes) { 1952 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1953 } 1954 } 1955 1956 // Aggressive optimization flags -XX:+AggressiveOpts 1957 jint Arguments::set_aggressive_opts_flags() { 1958 #ifdef COMPILER2 1959 if (AggressiveUnboxing) { 1960 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1961 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1962 } else if (!EliminateAutoBox) { 1963 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 1964 AggressiveUnboxing = false; 1965 } 1966 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1967 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1968 } else if (!DoEscapeAnalysis) { 1969 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 1970 AggressiveUnboxing = false; 1971 } 1972 } 1973 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1974 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1975 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1976 } 1977 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1978 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1979 } 1980 1981 // Feed the cache size setting into the JDK 1982 char buffer[1024]; 1983 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 1984 if (!add_property(buffer)) { 1985 return JNI_ENOMEM; 1986 } 1987 } 1988 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 1989 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 1990 } 1991 #endif 1992 1993 if (AggressiveOpts) { 1994 // Sample flag setting code 1995 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1996 // FLAG_SET_DEFAULT(EliminateZeroing, true); 1997 // } 1998 } 1999 2000 return JNI_OK; 2001 } 2002 2003 //=========================================================================================================== 2004 // Parsing of java.compiler property 2005 2006 void Arguments::process_java_compiler_argument(const char* arg) { 2007 // For backwards compatibility, Djava.compiler=NONE or "" 2008 // causes us to switch to -Xint mode UNLESS -Xdebug 2009 // is also specified. 2010 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 2011 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 2012 } 2013 } 2014 2015 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2016 _sun_java_launcher = os::strdup_check_oom(launcher); 2017 } 2018 2019 bool Arguments::created_by_java_launcher() { 2020 assert(_sun_java_launcher != NULL, "property must have value"); 2021 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2022 } 2023 2024 bool Arguments::sun_java_launcher_is_altjvm() { 2025 return _sun_java_launcher_is_altjvm; 2026 } 2027 2028 //=========================================================================================================== 2029 // Parsing of main arguments 2030 2031 unsigned int addreads_count = 0; 2032 unsigned int addexports_count = 0; 2033 unsigned int addopens_count = 0; 2034 unsigned int addmods_count = 0; 2035 unsigned int patch_mod_count = 0; 2036 2037 // Check the consistency of vm_init_args 2038 bool Arguments::check_vm_args_consistency() { 2039 // Method for adding checks for flag consistency. 2040 // The intent is to warn the user of all possible conflicts, 2041 // before returning an error. 2042 // Note: Needs platform-dependent factoring. 2043 bool status = true; 2044 2045 if (TLABRefillWasteFraction == 0) { 2046 jio_fprintf(defaultStream::error_stream(), 2047 "TLABRefillWasteFraction should be a denominator, " 2048 "not " SIZE_FORMAT "\n", 2049 TLABRefillWasteFraction); 2050 status = false; 2051 } 2052 2053 if (PrintNMTStatistics) { 2054 #if INCLUDE_NMT 2055 if (MemTracker::tracking_level() == NMT_off) { 2056 #endif // INCLUDE_NMT 2057 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2058 PrintNMTStatistics = false; 2059 #if INCLUDE_NMT 2060 } 2061 #endif 2062 } 2063 2064 status = CompilerConfig::check_args_consistency(status); 2065 #if INCLUDE_JVMCI 2066 if (status && EnableJVMCI) { 2067 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true", 2068 AddProperty, UnwriteableProperty, InternalProperty); 2069 if (!create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) { 2070 return false; 2071 } 2072 } 2073 #endif 2074 2075 #ifndef SUPPORT_RESERVED_STACK_AREA 2076 if (StackReservedPages != 0) { 2077 FLAG_SET_CMDLINE(intx, StackReservedPages, 0); 2078 warning("Reserved Stack Area not supported on this platform"); 2079 } 2080 #endif 2081 2082 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) { 2083 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) { 2084 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n"); 2085 } 2086 } 2087 return status; 2088 } 2089 2090 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2091 const char* option_type) { 2092 if (ignore) return false; 2093 2094 const char* spacer = " "; 2095 if (option_type == NULL) { 2096 option_type = ++spacer; // Set both to the empty string. 2097 } 2098 2099 if (os::obsolete_option(option)) { 2100 jio_fprintf(defaultStream::error_stream(), 2101 "Obsolete %s%soption: %s\n", option_type, spacer, 2102 option->optionString); 2103 return false; 2104 } else { 2105 jio_fprintf(defaultStream::error_stream(), 2106 "Unrecognized %s%soption: %s\n", option_type, spacer, 2107 option->optionString); 2108 return true; 2109 } 2110 } 2111 2112 static const char* user_assertion_options[] = { 2113 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2114 }; 2115 2116 static const char* system_assertion_options[] = { 2117 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2118 }; 2119 2120 bool Arguments::parse_uintx(const char* value, 2121 uintx* uintx_arg, 2122 uintx min_size) { 2123 2124 // Check the sign first since atojulong() parses only unsigned values. 2125 bool value_is_positive = !(*value == '-'); 2126 2127 if (value_is_positive) { 2128 julong n; 2129 bool good_return = atojulong(value, &n); 2130 if (good_return) { 2131 bool above_minimum = n >= min_size; 2132 bool value_is_too_large = n > max_uintx; 2133 2134 if (above_minimum && !value_is_too_large) { 2135 *uintx_arg = n; 2136 return true; 2137 } 2138 } 2139 } 2140 return false; 2141 } 2142 2143 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) { 2144 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2; 2145 char* property = AllocateHeap(prop_len, mtArguments); 2146 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value); 2147 if (ret < 0 || ret >= (int)prop_len) { 2148 FreeHeap(property); 2149 return false; 2150 } 2151 bool added = add_property(property, UnwriteableProperty, internal); 2152 FreeHeap(property); 2153 return added; 2154 } 2155 2156 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) { 2157 const unsigned int props_count_limit = 1000; 2158 const int max_digits = 3; 2159 const int extra_symbols_count = 3; // includes '.', '=', '\0' 2160 2161 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small. 2162 if (count < props_count_limit) { 2163 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count; 2164 char* property = AllocateHeap(prop_len, mtArguments); 2165 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value); 2166 if (ret < 0 || ret >= (int)prop_len) { 2167 FreeHeap(property); 2168 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value); 2169 return false; 2170 } 2171 bool added = add_property(property, UnwriteableProperty, InternalProperty); 2172 FreeHeap(property); 2173 return added; 2174 } 2175 2176 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit); 2177 return false; 2178 } 2179 2180 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2181 julong* long_arg, 2182 julong min_size, 2183 julong max_size) { 2184 if (!atojulong(s, long_arg)) return arg_unreadable; 2185 return check_memory_size(*long_arg, min_size, max_size); 2186 } 2187 2188 // Parse JavaVMInitArgs structure 2189 2190 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 2191 const JavaVMInitArgs *java_options_args, 2192 const JavaVMInitArgs *cmd_line_args) { 2193 bool patch_mod_javabase = false; 2194 2195 // Save default settings for some mode flags 2196 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2197 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2198 Arguments::_ClipInlining = ClipInlining; 2199 Arguments::_BackgroundCompilation = BackgroundCompilation; 2200 if (TieredCompilation) { 2201 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 2202 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 2203 } 2204 2205 // Setup flags for mixed which is the default 2206 set_mode_flags(_mixed); 2207 2208 // Parse args structure generated from JAVA_TOOL_OPTIONS environment 2209 // variable (if present). 2210 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR); 2211 if (result != JNI_OK) { 2212 return result; 2213 } 2214 2215 // Parse args structure generated from the command line flags. 2216 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, JVMFlag::COMMAND_LINE); 2217 if (result != JNI_OK) { 2218 return result; 2219 } 2220 2221 // Parse args structure generated from the _JAVA_OPTIONS environment 2222 // variable (if present) (mimics classic VM) 2223 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR); 2224 if (result != JNI_OK) { 2225 return result; 2226 } 2227 2228 // We need to ensure processor and memory resources have been properly 2229 // configured - which may rely on arguments we just processed - before 2230 // doing the final argument processing. Any argument processing that 2231 // needs to know about processor and memory resources must occur after 2232 // this point. 2233 2234 os::init_container_support(); 2235 2236 // Do final processing now that all arguments have been parsed 2237 result = finalize_vm_init_args(patch_mod_javabase); 2238 if (result != JNI_OK) { 2239 return result; 2240 } 2241 2242 return JNI_OK; 2243 } 2244 2245 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2246 // represents a valid JDWP agent. is_path==true denotes that we 2247 // are dealing with -agentpath (case where name is a path), otherwise with 2248 // -agentlib 2249 bool valid_jdwp_agent(char *name, bool is_path) { 2250 char *_name; 2251 const char *_jdwp = "jdwp"; 2252 size_t _len_jdwp, _len_prefix; 2253 2254 if (is_path) { 2255 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2256 return false; 2257 } 2258 2259 _name++; // skip past last path separator 2260 _len_prefix = strlen(JNI_LIB_PREFIX); 2261 2262 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2263 return false; 2264 } 2265 2266 _name += _len_prefix; 2267 _len_jdwp = strlen(_jdwp); 2268 2269 if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2270 _name += _len_jdwp; 2271 } 2272 else { 2273 return false; 2274 } 2275 2276 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2277 return false; 2278 } 2279 2280 return true; 2281 } 2282 2283 if (strcmp(name, _jdwp) == 0) { 2284 return true; 2285 } 2286 2287 return false; 2288 } 2289 2290 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) { 2291 // --patch-module=<module>=<file>(<pathsep><file>)* 2292 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value"); 2293 // Find the equal sign between the module name and the path specification 2294 const char* module_equal = strchr(patch_mod_tail, '='); 2295 if (module_equal == NULL) { 2296 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n"); 2297 return JNI_ERR; 2298 } else { 2299 // Pick out the module name 2300 size_t module_len = module_equal - patch_mod_tail; 2301 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments); 2302 if (module_name != NULL) { 2303 memcpy(module_name, patch_mod_tail, module_len); 2304 *(module_name + module_len) = '\0'; 2305 // The path piece begins one past the module_equal sign 2306 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase); 2307 FREE_C_HEAP_ARRAY(char, module_name); 2308 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) { 2309 return JNI_ENOMEM; 2310 } 2311 } else { 2312 return JNI_ENOMEM; 2313 } 2314 } 2315 return JNI_OK; 2316 } 2317 2318 // Parse -Xss memory string parameter and convert to ThreadStackSize in K. 2319 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) { 2320 // The min and max sizes match the values in globals.hpp, but scaled 2321 // with K. The values have been chosen so that alignment with page 2322 // size doesn't change the max value, which makes the conversions 2323 // back and forth between Xss value and ThreadStackSize value easier. 2324 // The values have also been chosen to fit inside a 32-bit signed type. 2325 const julong min_ThreadStackSize = 0; 2326 const julong max_ThreadStackSize = 1 * M; 2327 2328 const julong min_size = min_ThreadStackSize * K; 2329 const julong max_size = max_ThreadStackSize * K; 2330 2331 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption"); 2332 2333 julong size = 0; 2334 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size); 2335 if (errcode != arg_in_range) { 2336 bool silent = (option == NULL); // Allow testing to silence error messages 2337 if (!silent) { 2338 jio_fprintf(defaultStream::error_stream(), 2339 "Invalid thread stack size: %s\n", option->optionString); 2340 describe_range_error(errcode); 2341 } 2342 return JNI_EINVAL; 2343 } 2344 2345 // Internally track ThreadStackSize in units of 1024 bytes. 2346 const julong size_aligned = align_up(size, K); 2347 assert(size <= size_aligned, 2348 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT, 2349 size, size_aligned); 2350 2351 const julong size_in_K = size_aligned / K; 2352 assert(size_in_K < (julong)max_intx, 2353 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT, 2354 size_in_K); 2355 2356 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow. 2357 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size()); 2358 assert(max_expanded < max_uintx && max_expanded >= size_in_K, 2359 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT, 2360 max_expanded, size_in_K); 2361 2362 *out_ThreadStackSize = (intx)size_in_K; 2363 2364 return JNI_OK; 2365 } 2366 2367 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin) { 2368 // For match_option to return remaining or value part of option string 2369 const char* tail; 2370 2371 // iterate over arguments 2372 for (int index = 0; index < args->nOptions; index++) { 2373 bool is_absolute_path = false; // for -agentpath vs -agentlib 2374 2375 const JavaVMOption* option = args->options + index; 2376 2377 if (!match_option(option, "-Djava.class.path", &tail) && 2378 !match_option(option, "-Dsun.java.command", &tail) && 2379 !match_option(option, "-Dsun.java.launcher", &tail)) { 2380 2381 // add all jvm options to the jvm_args string. This string 2382 // is used later to set the java.vm.args PerfData string constant. 2383 // the -Djava.class.path and the -Dsun.java.command options are 2384 // omitted from jvm_args string as each have their own PerfData 2385 // string constant object. 2386 build_jvm_args(option->optionString); 2387 } 2388 2389 // -verbose:[class/module/gc/jni] 2390 if (match_option(option, "-verbose", &tail)) { 2391 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2392 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load)); 2393 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload)); 2394 } else if (!strcmp(tail, ":module")) { 2395 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load)); 2396 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload)); 2397 } else if (!strcmp(tail, ":gc")) { 2398 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); 2399 } else if (!strcmp(tail, ":jni")) { 2400 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != JVMFlag::SUCCESS) { 2401 return JNI_EINVAL; 2402 } 2403 } 2404 // -da / -ea / -disableassertions / -enableassertions 2405 // These accept an optional class/package name separated by a colon, e.g., 2406 // -da:java.lang.Thread. 2407 } else if (match_option(option, user_assertion_options, &tail, true)) { 2408 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2409 if (*tail == '\0') { 2410 JavaAssertions::setUserClassDefault(enable); 2411 } else { 2412 assert(*tail == ':', "bogus match by match_option()"); 2413 JavaAssertions::addOption(tail + 1, enable); 2414 } 2415 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2416 } else if (match_option(option, system_assertion_options, &tail, false)) { 2417 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2418 JavaAssertions::setSystemClassDefault(enable); 2419 // -bootclasspath: 2420 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2421 jio_fprintf(defaultStream::output_stream(), 2422 "-Xbootclasspath is no longer a supported option.\n"); 2423 return JNI_EINVAL; 2424 // -bootclasspath/a: 2425 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2426 Arguments::append_sysclasspath(tail); 2427 // -bootclasspath/p: 2428 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2429 jio_fprintf(defaultStream::output_stream(), 2430 "-Xbootclasspath/p is no longer a supported option.\n"); 2431 return JNI_EINVAL; 2432 // -Xrun 2433 } else if (match_option(option, "-Xrun", &tail)) { 2434 if (tail != NULL) { 2435 const char* pos = strchr(tail, ':'); 2436 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2437 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments); 2438 jio_snprintf(name, len + 1, "%s", tail); 2439 2440 char *options = NULL; 2441 if(pos != NULL) { 2442 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2443 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2); 2444 } 2445 #if !INCLUDE_JVMTI 2446 if (strcmp(name, "jdwp") == 0) { 2447 jio_fprintf(defaultStream::error_stream(), 2448 "Debugging agents are not supported in this VM\n"); 2449 return JNI_ERR; 2450 } 2451 #endif // !INCLUDE_JVMTI 2452 add_init_library(name, options); 2453 } 2454 } else if (match_option(option, "--add-reads=", &tail)) { 2455 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) { 2456 return JNI_ENOMEM; 2457 } 2458 } else if (match_option(option, "--add-exports=", &tail)) { 2459 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) { 2460 return JNI_ENOMEM; 2461 } 2462 } else if (match_option(option, "--add-opens=", &tail)) { 2463 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) { 2464 return JNI_ENOMEM; 2465 } 2466 } else if (match_option(option, "--add-modules=", &tail)) { 2467 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) { 2468 return JNI_ENOMEM; 2469 } 2470 } else if (match_option(option, "--limit-modules=", &tail)) { 2471 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) { 2472 return JNI_ENOMEM; 2473 } 2474 } else if (match_option(option, "--module-path=", &tail)) { 2475 if (!create_property("jdk.module.path", tail, ExternalProperty)) { 2476 return JNI_ENOMEM; 2477 } 2478 } else if (match_option(option, "--upgrade-module-path=", &tail)) { 2479 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) { 2480 return JNI_ENOMEM; 2481 } 2482 } else if (match_option(option, "--patch-module=", &tail)) { 2483 // --patch-module=<module>=<file>(<pathsep><file>)* 2484 int res = process_patch_mod_option(tail, patch_mod_javabase); 2485 if (res != JNI_OK) { 2486 return res; 2487 } 2488 } else if (match_option(option, "--illegal-access=", &tail)) { 2489 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) { 2490 return JNI_ENOMEM; 2491 } 2492 // -agentlib and -agentpath 2493 } else if (match_option(option, "-agentlib:", &tail) || 2494 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2495 if(tail != NULL) { 2496 const char* pos = strchr(tail, '='); 2497 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2498 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len); 2499 name[len] = '\0'; 2500 2501 char *options = NULL; 2502 if(pos != NULL) { 2503 options = os::strdup_check_oom(pos + 1, mtArguments); 2504 } 2505 #if !INCLUDE_JVMTI 2506 if (valid_jdwp_agent(name, is_absolute_path)) { 2507 jio_fprintf(defaultStream::error_stream(), 2508 "Debugging agents are not supported in this VM\n"); 2509 return JNI_ERR; 2510 } 2511 #endif // !INCLUDE_JVMTI 2512 add_init_agent(name, options, is_absolute_path); 2513 } 2514 // -javaagent 2515 } else if (match_option(option, "-javaagent:", &tail)) { 2516 #if !INCLUDE_JVMTI 2517 jio_fprintf(defaultStream::error_stream(), 2518 "Instrumentation agents are not supported in this VM\n"); 2519 return JNI_ERR; 2520 #else 2521 if (tail != NULL) { 2522 size_t length = strlen(tail) + 1; 2523 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments); 2524 jio_snprintf(options, length, "%s", tail); 2525 add_instrument_agent("instrument", options, false); 2526 // java agents need module java.instrument 2527 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) { 2528 return JNI_ENOMEM; 2529 } 2530 } 2531 #endif // !INCLUDE_JVMTI 2532 // --enable_preview 2533 } else if (match_option(option, "--enable-preview")) { 2534 set_enable_preview(); 2535 // -Xnoclassgc 2536 } else if (match_option(option, "-Xnoclassgc")) { 2537 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != JVMFlag::SUCCESS) { 2538 return JNI_EINVAL; 2539 } 2540 // -Xconcgc 2541 } else if (match_option(option, "-Xconcgc")) { 2542 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != JVMFlag::SUCCESS) { 2543 return JNI_EINVAL; 2544 } 2545 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC"); 2546 // -Xnoconcgc 2547 } else if (match_option(option, "-Xnoconcgc")) { 2548 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != JVMFlag::SUCCESS) { 2549 return JNI_EINVAL; 2550 } 2551 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC"); 2552 // -Xbatch 2553 } else if (match_option(option, "-Xbatch")) { 2554 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) { 2555 return JNI_EINVAL; 2556 } 2557 // -Xmn for compatibility with other JVM vendors 2558 } else if (match_option(option, "-Xmn", &tail)) { 2559 julong long_initial_young_size = 0; 2560 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2561 if (errcode != arg_in_range) { 2562 jio_fprintf(defaultStream::error_stream(), 2563 "Invalid initial young generation size: %s\n", option->optionString); 2564 describe_range_error(errcode); 2565 return JNI_EINVAL; 2566 } 2567 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) { 2568 return JNI_EINVAL; 2569 } 2570 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) { 2571 return JNI_EINVAL; 2572 } 2573 // -Xms 2574 } else if (match_option(option, "-Xms", &tail)) { 2575 julong long_initial_heap_size = 0; 2576 // an initial heap size of 0 means automatically determine 2577 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2578 if (errcode != arg_in_range) { 2579 jio_fprintf(defaultStream::error_stream(), 2580 "Invalid initial heap size: %s\n", option->optionString); 2581 describe_range_error(errcode); 2582 return JNI_EINVAL; 2583 } 2584 set_min_heap_size((size_t)long_initial_heap_size); 2585 // Currently the minimum size and the initial heap sizes are the same. 2586 // Can be overridden with -XX:InitialHeapSize. 2587 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != JVMFlag::SUCCESS) { 2588 return JNI_EINVAL; 2589 } 2590 // -Xmx 2591 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2592 julong long_max_heap_size = 0; 2593 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2594 if (errcode != arg_in_range) { 2595 jio_fprintf(defaultStream::error_stream(), 2596 "Invalid maximum heap size: %s\n", option->optionString); 2597 describe_range_error(errcode); 2598 return JNI_EINVAL; 2599 } 2600 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) { 2601 return JNI_EINVAL; 2602 } 2603 // Xmaxf 2604 } else if (match_option(option, "-Xmaxf", &tail)) { 2605 char* err; 2606 int maxf = (int)(strtod(tail, &err) * 100); 2607 if (*err != '\0' || *tail == '\0') { 2608 jio_fprintf(defaultStream::error_stream(), 2609 "Bad max heap free percentage size: %s\n", 2610 option->optionString); 2611 return JNI_EINVAL; 2612 } else { 2613 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) { 2614 return JNI_EINVAL; 2615 } 2616 } 2617 // Xminf 2618 } else if (match_option(option, "-Xminf", &tail)) { 2619 char* err; 2620 int minf = (int)(strtod(tail, &err) * 100); 2621 if (*err != '\0' || *tail == '\0') { 2622 jio_fprintf(defaultStream::error_stream(), 2623 "Bad min heap free percentage size: %s\n", 2624 option->optionString); 2625 return JNI_EINVAL; 2626 } else { 2627 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) { 2628 return JNI_EINVAL; 2629 } 2630 } 2631 // -Xss 2632 } else if (match_option(option, "-Xss", &tail)) { 2633 intx value = 0; 2634 jint err = parse_xss(option, tail, &value); 2635 if (err != JNI_OK) { 2636 return err; 2637 } 2638 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != JVMFlag::SUCCESS) { 2639 return JNI_EINVAL; 2640 } 2641 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2642 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2643 julong long_ReservedCodeCacheSize = 0; 2644 2645 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2646 if (errcode != arg_in_range) { 2647 jio_fprintf(defaultStream::error_stream(), 2648 "Invalid maximum code cache size: %s.\n", option->optionString); 2649 return JNI_EINVAL; 2650 } 2651 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) { 2652 return JNI_EINVAL; 2653 } 2654 // -green 2655 } else if (match_option(option, "-green")) { 2656 jio_fprintf(defaultStream::error_stream(), 2657 "Green threads support not available\n"); 2658 return JNI_EINVAL; 2659 // -native 2660 } else if (match_option(option, "-native")) { 2661 // HotSpot always uses native threads, ignore silently for compatibility 2662 // -Xrs 2663 } else if (match_option(option, "-Xrs")) { 2664 // Classic/EVM option, new functionality 2665 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != JVMFlag::SUCCESS) { 2666 return JNI_EINVAL; 2667 } 2668 // -Xprof 2669 } else if (match_option(option, "-Xprof")) { 2670 char version[256]; 2671 // Obsolete in JDK 10 2672 JDK_Version::jdk(10).to_string(version, sizeof(version)); 2673 warning("Ignoring option %s; support was removed in %s", option->optionString, version); 2674 // -Xconcurrentio 2675 } else if (match_option(option, "-Xconcurrentio")) { 2676 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != JVMFlag::SUCCESS) { 2677 return JNI_EINVAL; 2678 } 2679 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) { 2680 return JNI_EINVAL; 2681 } 2682 SafepointSynchronize::set_defer_thr_suspend_loop_count(); 2683 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != JVMFlag::SUCCESS) { 2684 return JNI_EINVAL; 2685 } 2686 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != JVMFlag::SUCCESS) { // 20Kb per thread added to new generation 2687 return JNI_EINVAL; 2688 } 2689 2690 // -Xinternalversion 2691 } else if (match_option(option, "-Xinternalversion")) { 2692 jio_fprintf(defaultStream::output_stream(), "%s\n", 2693 VM_Version::internal_vm_info_string()); 2694 vm_exit(0); 2695 #ifndef PRODUCT 2696 // -Xprintflags 2697 } else if (match_option(option, "-Xprintflags")) { 2698 JVMFlag::printFlags(tty, false); 2699 vm_exit(0); 2700 #endif 2701 // -D 2702 } else if (match_option(option, "-D", &tail)) { 2703 const char* value; 2704 if (match_option(option, "-Djava.endorsed.dirs=", &value) && 2705 *value!= '\0' && strcmp(value, "\"\"") != 0) { 2706 // abort if -Djava.endorsed.dirs is set 2707 jio_fprintf(defaultStream::output_stream(), 2708 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n" 2709 "in modular form will be supported via the concept of upgradeable modules.\n", value); 2710 return JNI_EINVAL; 2711 } 2712 if (match_option(option, "-Djava.ext.dirs=", &value) && 2713 *value != '\0' && strcmp(value, "\"\"") != 0) { 2714 // abort if -Djava.ext.dirs is set 2715 jio_fprintf(defaultStream::output_stream(), 2716 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value); 2717 return JNI_EINVAL; 2718 } 2719 // Check for module related properties. They must be set using the modules 2720 // options. For example: use "--add-modules=java.sql", not 2721 // "-Djdk.module.addmods=java.sql" 2722 if (is_internal_module_property(option->optionString + 2)) { 2723 needs_module_property_warning = true; 2724 continue; 2725 } 2726 2727 if (!add_property(tail)) { 2728 return JNI_ENOMEM; 2729 } 2730 // Out of the box management support 2731 if (match_option(option, "-Dcom.sun.management", &tail)) { 2732 #if INCLUDE_MANAGEMENT 2733 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != JVMFlag::SUCCESS) { 2734 return JNI_EINVAL; 2735 } 2736 // management agent in module jdk.management.agent 2737 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) { 2738 return JNI_ENOMEM; 2739 } 2740 #else 2741 jio_fprintf(defaultStream::output_stream(), 2742 "-Dcom.sun.management is not supported in this VM.\n"); 2743 return JNI_ERR; 2744 #endif 2745 } 2746 // -Xint 2747 } else if (match_option(option, "-Xint")) { 2748 set_mode_flags(_int); 2749 // -Xmixed 2750 } else if (match_option(option, "-Xmixed")) { 2751 set_mode_flags(_mixed); 2752 // -Xcomp 2753 } else if (match_option(option, "-Xcomp")) { 2754 // for testing the compiler; turn off all flags that inhibit compilation 2755 set_mode_flags(_comp); 2756 // -Xshare:dump 2757 } else if (match_option(option, "-Xshare:dump")) { 2758 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != JVMFlag::SUCCESS) { 2759 return JNI_EINVAL; 2760 } 2761 set_mode_flags(_int); // Prevent compilation, which creates objects 2762 // -Xshare:on 2763 } else if (match_option(option, "-Xshare:on")) { 2764 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) { 2765 return JNI_EINVAL; 2766 } 2767 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) { 2768 return JNI_EINVAL; 2769 } 2770 // -Xshare:auto 2771 } else if (match_option(option, "-Xshare:auto")) { 2772 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) { 2773 return JNI_EINVAL; 2774 } 2775 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) { 2776 return JNI_EINVAL; 2777 } 2778 // -Xshare:off 2779 } else if (match_option(option, "-Xshare:off")) { 2780 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != JVMFlag::SUCCESS) { 2781 return JNI_EINVAL; 2782 } 2783 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) { 2784 return JNI_EINVAL; 2785 } 2786 // -Xverify 2787 } else if (match_option(option, "-Xverify", &tail)) { 2788 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 2789 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) { 2790 return JNI_EINVAL; 2791 } 2792 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) { 2793 return JNI_EINVAL; 2794 } 2795 } else if (strcmp(tail, ":remote") == 0) { 2796 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) { 2797 return JNI_EINVAL; 2798 } 2799 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) { 2800 return JNI_EINVAL; 2801 } 2802 } else if (strcmp(tail, ":none") == 0) { 2803 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) { 2804 return JNI_EINVAL; 2805 } 2806 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) { 2807 return JNI_EINVAL; 2808 } 2809 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 2810 return JNI_EINVAL; 2811 } 2812 // -Xdebug 2813 } else if (match_option(option, "-Xdebug")) { 2814 // note this flag has been used, then ignore 2815 set_xdebug_mode(true); 2816 // -Xnoagent 2817 } else if (match_option(option, "-Xnoagent")) { 2818 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 2819 } else if (match_option(option, "-Xloggc:", &tail)) { 2820 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename> 2821 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail); 2822 _gc_log_filename = os::strdup_check_oom(tail); 2823 } else if (match_option(option, "-Xlog", &tail)) { 2824 bool ret = false; 2825 if (strcmp(tail, ":help") == 0) { 2826 fileStream stream(defaultStream::output_stream()); 2827 LogConfiguration::print_command_line_help(&stream); 2828 vm_exit(0); 2829 } else if (strcmp(tail, ":disable") == 0) { 2830 LogConfiguration::disable_logging(); 2831 ret = true; 2832 } else if (*tail == '\0') { 2833 ret = LogConfiguration::parse_command_line_arguments(); 2834 assert(ret, "-Xlog without arguments should never fail to parse"); 2835 } else if (*tail == ':') { 2836 ret = LogConfiguration::parse_command_line_arguments(tail + 1); 2837 } 2838 if (ret == false) { 2839 jio_fprintf(defaultStream::error_stream(), 2840 "Invalid -Xlog option '-Xlog%s', see error log for details.\n", 2841 tail); 2842 return JNI_EINVAL; 2843 } 2844 // JNI hooks 2845 } else if (match_option(option, "-Xcheck", &tail)) { 2846 if (!strcmp(tail, ":jni")) { 2847 #if !INCLUDE_JNI_CHECK 2848 warning("JNI CHECKING is not supported in this VM"); 2849 #else 2850 CheckJNICalls = true; 2851 #endif // INCLUDE_JNI_CHECK 2852 } else if (is_bad_option(option, args->ignoreUnrecognized, 2853 "check")) { 2854 return JNI_EINVAL; 2855 } 2856 } else if (match_option(option, "vfprintf")) { 2857 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 2858 } else if (match_option(option, "exit")) { 2859 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 2860 } else if (match_option(option, "abort")) { 2861 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 2862 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 2863 // and the last option wins. 2864 } else if (match_option(option, "-XX:+NeverTenure")) { 2865 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != JVMFlag::SUCCESS) { 2866 return JNI_EINVAL; 2867 } 2868 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) { 2869 return JNI_EINVAL; 2870 } 2871 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != JVMFlag::SUCCESS) { 2872 return JNI_EINVAL; 2873 } 2874 } else if (match_option(option, "-XX:+AlwaysTenure")) { 2875 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) { 2876 return JNI_EINVAL; 2877 } 2878 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) { 2879 return JNI_EINVAL; 2880 } 2881 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) { 2882 return JNI_EINVAL; 2883 } 2884 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 2885 uintx max_tenuring_thresh = 0; 2886 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) { 2887 jio_fprintf(defaultStream::error_stream(), 2888 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail); 2889 return JNI_EINVAL; 2890 } 2891 2892 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) { 2893 return JNI_EINVAL; 2894 } 2895 2896 if (MaxTenuringThreshold == 0) { 2897 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) { 2898 return JNI_EINVAL; 2899 } 2900 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) { 2901 return JNI_EINVAL; 2902 } 2903 } else { 2904 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) { 2905 return JNI_EINVAL; 2906 } 2907 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) { 2908 return JNI_EINVAL; 2909 } 2910 } 2911 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) { 2912 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) { 2913 return JNI_EINVAL; 2914 } 2915 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) { 2916 return JNI_EINVAL; 2917 } 2918 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) { 2919 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) { 2920 return JNI_EINVAL; 2921 } 2922 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) { 2923 return JNI_EINVAL; 2924 } 2925 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) { 2926 #if defined(DTRACE_ENABLED) 2927 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != JVMFlag::SUCCESS) { 2928 return JNI_EINVAL; 2929 } 2930 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != JVMFlag::SUCCESS) { 2931 return JNI_EINVAL; 2932 } 2933 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != JVMFlag::SUCCESS) { 2934 return JNI_EINVAL; 2935 } 2936 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != JVMFlag::SUCCESS) { 2937 return JNI_EINVAL; 2938 } 2939 #else // defined(DTRACE_ENABLED) 2940 jio_fprintf(defaultStream::error_stream(), 2941 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 2942 return JNI_EINVAL; 2943 #endif // defined(DTRACE_ENABLED) 2944 #ifdef ASSERT 2945 } else if (match_option(option, "-XX:+FullGCALot")) { 2946 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != JVMFlag::SUCCESS) { 2947 return JNI_EINVAL; 2948 } 2949 // disable scavenge before parallel mark-compact 2950 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) { 2951 return JNI_EINVAL; 2952 } 2953 #endif 2954 #if !INCLUDE_MANAGEMENT 2955 } else if (match_option(option, "-XX:+ManagementServer")) { 2956 jio_fprintf(defaultStream::error_stream(), 2957 "ManagementServer is not supported in this VM.\n"); 2958 return JNI_ERR; 2959 #endif // INCLUDE_MANAGEMENT 2960 #if INCLUDE_JFR 2961 } else if (match_jfr_option(&option)) { 2962 return JNI_EINVAL; 2963 #endif 2964 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 2965 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have 2966 // already been handled 2967 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) && 2968 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) { 2969 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 2970 return JNI_EINVAL; 2971 } 2972 } 2973 // Unknown option 2974 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 2975 return JNI_ERR; 2976 } 2977 } 2978 2979 // PrintSharedArchiveAndExit will turn on 2980 // -Xshare:on 2981 // -Xlog:class+path=info 2982 if (PrintSharedArchiveAndExit) { 2983 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) { 2984 return JNI_EINVAL; 2985 } 2986 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) { 2987 return JNI_EINVAL; 2988 } 2989 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path)); 2990 } 2991 2992 // Change the default value for flags which have different default values 2993 // when working with older JDKs. 2994 #ifdef LINUX 2995 if (JDK_Version::current().compare_major(6) <= 0 && 2996 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 2997 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 2998 } 2999 #endif // LINUX 3000 fix_appclasspath(); 3001 return JNI_OK; 3002 } 3003 3004 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) { 3005 // For java.base check for duplicate --patch-module options being specified on the command line. 3006 // This check is only required for java.base, all other duplicate module specifications 3007 // will be checked during module system initialization. The module system initialization 3008 // will throw an ExceptionInInitializerError if this situation occurs. 3009 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 3010 if (*patch_mod_javabase) { 3011 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module"); 3012 } else { 3013 *patch_mod_javabase = true; 3014 } 3015 } 3016 3017 // Create GrowableArray lazily, only if --patch-module has been specified 3018 if (_patch_mod_prefix == NULL) { 3019 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true); 3020 } 3021 3022 _patch_mod_prefix->push(new ModulePatchPath(module_name, path)); 3023 } 3024 3025 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3026 // 3027 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3028 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3029 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3030 // path is treated as the current directory. 3031 // 3032 // This causes problems with CDS, which requires that all directories specified in the classpath 3033 // must be empty. In most cases, applications do NOT want to load classes from the current 3034 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3035 // scripts compatible with CDS. 3036 void Arguments::fix_appclasspath() { 3037 if (IgnoreEmptyClassPaths) { 3038 const char separator = *os::path_separator(); 3039 const char* src = _java_class_path->value(); 3040 3041 // skip over all the leading empty paths 3042 while (*src == separator) { 3043 src ++; 3044 } 3045 3046 char* copy = os::strdup_check_oom(src, mtArguments); 3047 3048 // trim all trailing empty paths 3049 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3050 *tail = '\0'; 3051 } 3052 3053 char from[3] = {separator, separator, '\0'}; 3054 char to [2] = {separator, '\0'}; 3055 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3056 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3057 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3058 } 3059 3060 _java_class_path->set_writeable_value(copy); 3061 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3062 } 3063 } 3064 3065 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) { 3066 // check if the default lib/endorsed directory exists; if so, error 3067 char path[JVM_MAXPATHLEN]; 3068 const char* fileSep = os::file_separator(); 3069 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); 3070 3071 DIR* dir = os::opendir(path); 3072 if (dir != NULL) { 3073 jio_fprintf(defaultStream::output_stream(), 3074 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n" 3075 "in modular form will be supported via the concept of upgradeable modules.\n"); 3076 os::closedir(dir); 3077 return JNI_ERR; 3078 } 3079 3080 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); 3081 dir = os::opendir(path); 3082 if (dir != NULL) { 3083 jio_fprintf(defaultStream::output_stream(), 3084 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; " 3085 "Use -classpath instead.\n."); 3086 os::closedir(dir); 3087 return JNI_ERR; 3088 } 3089 3090 // This must be done after all arguments have been processed 3091 // and the container support has been initialized since AggressiveHeap 3092 // relies on the amount of total memory available. 3093 if (AggressiveHeap) { 3094 jint result = set_aggressive_heap_flags(); 3095 if (result != JNI_OK) { 3096 return result; 3097 } 3098 } 3099 3100 // This must be done after all arguments have been processed. 3101 // java_compiler() true means set to "NONE" or empty. 3102 if (java_compiler() && !xdebug_mode()) { 3103 // For backwards compatibility, we switch to interpreted mode if 3104 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3105 // not specified. 3106 set_mode_flags(_int); 3107 } 3108 3109 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode), 3110 // but like -Xint, leave compilation thresholds unaffected. 3111 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well. 3112 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) { 3113 set_mode_flags(_int); 3114 } 3115 3116 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3117 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3118 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3119 } 3120 3121 #if !COMPILER2_OR_JVMCI 3122 // Don't degrade server performance for footprint 3123 if (FLAG_IS_DEFAULT(UseLargePages) && 3124 MaxHeapSize < LargePageHeapSizeThreshold) { 3125 // No need for large granularity pages w/small heaps. 3126 // Note that large pages are enabled/disabled for both the 3127 // Java heap and the code cache. 3128 FLAG_SET_DEFAULT(UseLargePages, false); 3129 } 3130 3131 UNSUPPORTED_OPTION(ProfileInterpreter); 3132 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter)); 3133 #endif 3134 3135 #ifndef TIERED 3136 // Tiered compilation is undefined. 3137 UNSUPPORTED_OPTION(TieredCompilation); 3138 #endif 3139 3140 if (!check_vm_args_consistency()) { 3141 return JNI_ERR; 3142 } 3143 3144 #if INCLUDE_CDS 3145 if (DumpSharedSpaces) { 3146 // Disable biased locking now as it interferes with the clean up of 3147 // the archived Klasses and Java string objects (at dump time only). 3148 UseBiasedLocking = false; 3149 3150 // Always verify non-system classes during CDS dump 3151 if (!BytecodeVerificationRemote) { 3152 BytecodeVerificationRemote = true; 3153 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time."); 3154 } 3155 } 3156 if (UseSharedSpaces && patch_mod_javabase) { 3157 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched."); 3158 } 3159 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) { 3160 FLAG_SET_DEFAULT(UseSharedSpaces, false); 3161 } 3162 #endif 3163 3164 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT 3165 UNSUPPORTED_OPTION(ShowRegistersOnAssert); 3166 #endif // CAN_SHOW_REGISTERS_ON_ASSERT 3167 3168 return JNI_OK; 3169 } 3170 3171 // Helper class for controlling the lifetime of JavaVMInitArgs 3172 // objects. The contents of the JavaVMInitArgs are guaranteed to be 3173 // deleted on the destruction of the ScopedVMInitArgs object. 3174 class ScopedVMInitArgs : public StackObj { 3175 private: 3176 JavaVMInitArgs _args; 3177 char* _container_name; 3178 bool _is_set; 3179 char* _vm_options_file_arg; 3180 3181 public: 3182 ScopedVMInitArgs(const char *container_name) { 3183 _args.version = JNI_VERSION_1_2; 3184 _args.nOptions = 0; 3185 _args.options = NULL; 3186 _args.ignoreUnrecognized = false; 3187 _container_name = (char *)container_name; 3188 _is_set = false; 3189 _vm_options_file_arg = NULL; 3190 } 3191 3192 // Populates the JavaVMInitArgs object represented by this 3193 // ScopedVMInitArgs object with the arguments in options. The 3194 // allocated memory is deleted by the destructor. If this method 3195 // returns anything other than JNI_OK, then this object is in a 3196 // partially constructed state, and should be abandoned. 3197 jint set_args(GrowableArray<JavaVMOption>* options) { 3198 _is_set = true; 3199 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL( 3200 JavaVMOption, options->length(), mtArguments); 3201 if (options_arr == NULL) { 3202 return JNI_ENOMEM; 3203 } 3204 _args.options = options_arr; 3205 3206 for (int i = 0; i < options->length(); i++) { 3207 options_arr[i] = options->at(i); 3208 options_arr[i].optionString = os::strdup(options_arr[i].optionString); 3209 if (options_arr[i].optionString == NULL) { 3210 // Rely on the destructor to do cleanup. 3211 _args.nOptions = i; 3212 return JNI_ENOMEM; 3213 } 3214 } 3215 3216 _args.nOptions = options->length(); 3217 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3218 return JNI_OK; 3219 } 3220 3221 JavaVMInitArgs* get() { return &_args; } 3222 char* container_name() { return _container_name; } 3223 bool is_set() { return _is_set; } 3224 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; } 3225 char* vm_options_file_arg() { return _vm_options_file_arg; } 3226 3227 void set_vm_options_file_arg(const char *vm_options_file_arg) { 3228 if (_vm_options_file_arg != NULL) { 3229 os::free(_vm_options_file_arg); 3230 } 3231 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg); 3232 } 3233 3234 ~ScopedVMInitArgs() { 3235 if (_vm_options_file_arg != NULL) { 3236 os::free(_vm_options_file_arg); 3237 } 3238 if (_args.options == NULL) return; 3239 for (int i = 0; i < _args.nOptions; i++) { 3240 os::free(_args.options[i].optionString); 3241 } 3242 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options); 3243 } 3244 3245 // Insert options into this option list, to replace option at 3246 // vm_options_file_pos (-XX:VMOptionsFile) 3247 jint insert(const JavaVMInitArgs* args, 3248 const JavaVMInitArgs* args_to_insert, 3249 const int vm_options_file_pos) { 3250 assert(_args.options == NULL, "shouldn't be set yet"); 3251 assert(args_to_insert->nOptions != 0, "there should be args to insert"); 3252 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set"); 3253 3254 int length = args->nOptions + args_to_insert->nOptions - 1; 3255 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) 3256 GrowableArray<JavaVMOption>(length, true); // Construct new option array 3257 for (int i = 0; i < args->nOptions; i++) { 3258 if (i == vm_options_file_pos) { 3259 // insert the new options starting at the same place as the 3260 // -XX:VMOptionsFile option 3261 for (int j = 0; j < args_to_insert->nOptions; j++) { 3262 options->push(args_to_insert->options[j]); 3263 } 3264 } else { 3265 options->push(args->options[i]); 3266 } 3267 } 3268 // make into options array 3269 jint result = set_args(options); 3270 delete options; 3271 return result; 3272 } 3273 }; 3274 3275 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) { 3276 return parse_options_environment_variable("_JAVA_OPTIONS", args); 3277 } 3278 3279 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) { 3280 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args); 3281 } 3282 3283 jint Arguments::parse_options_environment_variable(const char* name, 3284 ScopedVMInitArgs* vm_args) { 3285 char *buffer = ::getenv(name); 3286 3287 // Don't check this environment variable if user has special privileges 3288 // (e.g. unix su command). 3289 if (buffer == NULL || os::have_special_privileges()) { 3290 return JNI_OK; 3291 } 3292 3293 if ((buffer = os::strdup(buffer)) == NULL) { 3294 return JNI_ENOMEM; 3295 } 3296 3297 jio_fprintf(defaultStream::error_stream(), 3298 "Picked up %s: %s\n", name, buffer); 3299 3300 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args); 3301 3302 os::free(buffer); 3303 return retcode; 3304 } 3305 3306 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) { 3307 // read file into buffer 3308 int fd = ::open(file_name, O_RDONLY); 3309 if (fd < 0) { 3310 jio_fprintf(defaultStream::error_stream(), 3311 "Could not open options file '%s'\n", 3312 file_name); 3313 return JNI_ERR; 3314 } 3315 3316 struct stat stbuf; 3317 int retcode = os::stat(file_name, &stbuf); 3318 if (retcode != 0) { 3319 jio_fprintf(defaultStream::error_stream(), 3320 "Could not stat options file '%s'\n", 3321 file_name); 3322 os::close(fd); 3323 return JNI_ERR; 3324 } 3325 3326 if (stbuf.st_size == 0) { 3327 // tell caller there is no option data and that is ok 3328 os::close(fd); 3329 return JNI_OK; 3330 } 3331 3332 // '+ 1' for NULL termination even with max bytes 3333 size_t bytes_alloc = stbuf.st_size + 1; 3334 3335 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments); 3336 if (NULL == buf) { 3337 jio_fprintf(defaultStream::error_stream(), 3338 "Could not allocate read buffer for options file parse\n"); 3339 os::close(fd); 3340 return JNI_ENOMEM; 3341 } 3342 3343 memset(buf, 0, bytes_alloc); 3344 3345 // Fill buffer 3346 // Use ::read() instead of os::read because os::read() 3347 // might do a thread state transition 3348 // and it is too early for that here 3349 3350 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc); 3351 os::close(fd); 3352 if (bytes_read < 0) { 3353 FREE_C_HEAP_ARRAY(char, buf); 3354 jio_fprintf(defaultStream::error_stream(), 3355 "Could not read options file '%s'\n", file_name); 3356 return JNI_ERR; 3357 } 3358 3359 if (bytes_read == 0) { 3360 // tell caller there is no option data and that is ok 3361 FREE_C_HEAP_ARRAY(char, buf); 3362 return JNI_OK; 3363 } 3364 3365 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args); 3366 3367 FREE_C_HEAP_ARRAY(char, buf); 3368 return retcode; 3369 } 3370 3371 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) { 3372 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array 3373 3374 // some pointers to help with parsing 3375 char *buffer_end = buffer + buf_len; 3376 char *opt_hd = buffer; 3377 char *wrt = buffer; 3378 char *rd = buffer; 3379 3380 // parse all options 3381 while (rd < buffer_end) { 3382 // skip leading white space from the input string 3383 while (rd < buffer_end && isspace(*rd)) { 3384 rd++; 3385 } 3386 3387 if (rd >= buffer_end) { 3388 break; 3389 } 3390 3391 // Remember this is where we found the head of the token. 3392 opt_hd = wrt; 3393 3394 // Tokens are strings of non white space characters separated 3395 // by one or more white spaces. 3396 while (rd < buffer_end && !isspace(*rd)) { 3397 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3398 int quote = *rd; // matching quote to look for 3399 rd++; // don't copy open quote 3400 while (rd < buffer_end && *rd != quote) { 3401 // include everything (even spaces) 3402 // up until the close quote 3403 *wrt++ = *rd++; // copy to option string 3404 } 3405 3406 if (rd < buffer_end) { 3407 rd++; // don't copy close quote 3408 } else { 3409 // did not see closing quote 3410 jio_fprintf(defaultStream::error_stream(), 3411 "Unmatched quote in %s\n", name); 3412 delete options; 3413 return JNI_ERR; 3414 } 3415 } else { 3416 *wrt++ = *rd++; // copy to option string 3417 } 3418 } 3419 3420 // steal a white space character and set it to NULL 3421 *wrt++ = '\0'; 3422 // We now have a complete token 3423 3424 JavaVMOption option; 3425 option.optionString = opt_hd; 3426 option.extraInfo = NULL; 3427 3428 options->append(option); // Fill in option 3429 3430 rd++; // Advance to next character 3431 } 3432 3433 // Fill out JavaVMInitArgs structure. 3434 jint status = vm_args->set_args(options); 3435 3436 delete options; 3437 return status; 3438 } 3439 3440 void Arguments::set_shared_spaces_flags() { 3441 if (DumpSharedSpaces) { 3442 if (FailOverToOldVerifier) { 3443 // Don't fall back to the old verifier on verification failure. If a 3444 // class fails verification with the split verifier, it might fail the 3445 // CDS runtime verifier constraint check. In that case, we don't want 3446 // to share the class. We only archive classes that pass the split verifier. 3447 FLAG_SET_DEFAULT(FailOverToOldVerifier, false); 3448 } 3449 3450 if (RequireSharedSpaces) { 3451 warning("Cannot dump shared archive while using shared archive"); 3452 } 3453 UseSharedSpaces = false; 3454 #ifdef _LP64 3455 if (!UseCompressedOops || !UseCompressedClassPointers) { 3456 vm_exit_during_initialization( 3457 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3458 } 3459 } else { 3460 if (!UseCompressedOops || !UseCompressedClassPointers) { 3461 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3462 } 3463 #endif 3464 } 3465 } 3466 3467 // Sharing support 3468 // Construct the path to the archive 3469 static char* get_shared_archive_path() { 3470 char *shared_archive_path; 3471 if (SharedArchiveFile == NULL) { 3472 char jvm_path[JVM_MAXPATHLEN]; 3473 os::jvm_path(jvm_path, sizeof(jvm_path)); 3474 char *end = strrchr(jvm_path, *os::file_separator()); 3475 if (end != NULL) *end = '\0'; 3476 size_t jvm_path_len = strlen(jvm_path); 3477 size_t file_sep_len = strlen(os::file_separator()); 3478 const size_t len = jvm_path_len + file_sep_len + 20; 3479 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments); 3480 if (shared_archive_path != NULL) { 3481 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa", 3482 jvm_path, os::file_separator()); 3483 } 3484 } else { 3485 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments); 3486 } 3487 return shared_archive_path; 3488 } 3489 3490 #ifndef PRODUCT 3491 // Determine whether LogVMOutput should be implicitly turned on. 3492 static bool use_vm_log() { 3493 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3494 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3495 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3496 PrintAssembly || TraceDeoptimization || TraceDependencies || 3497 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3498 return true; 3499 } 3500 3501 #ifdef COMPILER1 3502 if (PrintC1Statistics) { 3503 return true; 3504 } 3505 #endif // COMPILER1 3506 3507 #ifdef COMPILER2 3508 if (PrintOptoAssembly || PrintOptoStatistics) { 3509 return true; 3510 } 3511 #endif // COMPILER2 3512 3513 return false; 3514 } 3515 3516 #endif // PRODUCT 3517 3518 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) { 3519 for (int index = 0; index < args->nOptions; index++) { 3520 const JavaVMOption* option = args->options + index; 3521 const char* tail; 3522 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3523 return true; 3524 } 3525 } 3526 return false; 3527 } 3528 3529 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args, 3530 const char* vm_options_file, 3531 const int vm_options_file_pos, 3532 ScopedVMInitArgs* vm_options_file_args, 3533 ScopedVMInitArgs* args_out) { 3534 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args); 3535 if (code != JNI_OK) { 3536 return code; 3537 } 3538 3539 if (vm_options_file_args->get()->nOptions < 1) { 3540 return JNI_OK; 3541 } 3542 3543 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) { 3544 jio_fprintf(defaultStream::error_stream(), 3545 "A VM options file may not refer to a VM options file. " 3546 "Specification of '-XX:VMOptionsFile=<file-name>' in the " 3547 "options file '%s' in options container '%s' is an error.\n", 3548 vm_options_file_args->vm_options_file_arg(), 3549 vm_options_file_args->container_name()); 3550 return JNI_EINVAL; 3551 } 3552 3553 return args_out->insert(args, vm_options_file_args->get(), 3554 vm_options_file_pos); 3555 } 3556 3557 // Expand -XX:VMOptionsFile found in args_in as needed. 3558 // mod_args and args_out parameters may return values as needed. 3559 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 3560 ScopedVMInitArgs* mod_args, 3561 JavaVMInitArgs** args_out) { 3562 jint code = match_special_option_and_act(args_in, mod_args); 3563 if (code != JNI_OK) { 3564 return code; 3565 } 3566 3567 if (mod_args->is_set()) { 3568 // args_in contains -XX:VMOptionsFile and mod_args contains the 3569 // original options from args_in along with the options expanded 3570 // from the VMOptionsFile. Return a short-hand to the caller. 3571 *args_out = mod_args->get(); 3572 } else { 3573 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in 3574 } 3575 return JNI_OK; 3576 } 3577 3578 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args, 3579 ScopedVMInitArgs* args_out) { 3580 // Remaining part of option string 3581 const char* tail; 3582 ScopedVMInitArgs vm_options_file_args(args_out->container_name()); 3583 3584 for (int index = 0; index < args->nOptions; index++) { 3585 const JavaVMOption* option = args->options + index; 3586 if (ArgumentsExt::process_options(option)) { 3587 continue; 3588 } 3589 if (match_option(option, "-XX:Flags=", &tail)) { 3590 Arguments::set_jvm_flags_file(tail); 3591 continue; 3592 } 3593 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3594 if (vm_options_file_args.found_vm_options_file_arg()) { 3595 jio_fprintf(defaultStream::error_stream(), 3596 "The option '%s' is already specified in the options " 3597 "container '%s' so the specification of '%s' in the " 3598 "same options container is an error.\n", 3599 vm_options_file_args.vm_options_file_arg(), 3600 vm_options_file_args.container_name(), 3601 option->optionString); 3602 return JNI_EINVAL; 3603 } 3604 vm_options_file_args.set_vm_options_file_arg(option->optionString); 3605 // If there's a VMOptionsFile, parse that 3606 jint code = insert_vm_options_file(args, tail, index, 3607 &vm_options_file_args, args_out); 3608 if (code != JNI_OK) { 3609 return code; 3610 } 3611 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg()); 3612 if (args_out->is_set()) { 3613 // The VMOptions file inserted some options so switch 'args' 3614 // to the new set of options, and continue processing which 3615 // preserves "last option wins" semantics. 3616 args = args_out->get(); 3617 // The first option from the VMOptionsFile replaces the 3618 // current option. So we back track to process the 3619 // replacement option. 3620 index--; 3621 } 3622 continue; 3623 } 3624 if (match_option(option, "-XX:+PrintVMOptions")) { 3625 PrintVMOptions = true; 3626 continue; 3627 } 3628 if (match_option(option, "-XX:-PrintVMOptions")) { 3629 PrintVMOptions = false; 3630 continue; 3631 } 3632 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) { 3633 IgnoreUnrecognizedVMOptions = true; 3634 continue; 3635 } 3636 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) { 3637 IgnoreUnrecognizedVMOptions = false; 3638 continue; 3639 } 3640 if (match_option(option, "-XX:+PrintFlagsInitial")) { 3641 JVMFlag::printFlags(tty, false); 3642 vm_exit(0); 3643 } 3644 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3645 #if INCLUDE_NMT 3646 // The launcher did not setup nmt environment variable properly. 3647 if (!MemTracker::check_launcher_nmt_support(tail)) { 3648 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 3649 } 3650 3651 // Verify if nmt option is valid. 3652 if (MemTracker::verify_nmt_option()) { 3653 // Late initialization, still in single-threaded mode. 3654 if (MemTracker::tracking_level() >= NMT_summary) { 3655 MemTracker::init(); 3656 } 3657 } else { 3658 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 3659 } 3660 continue; 3661 #else 3662 jio_fprintf(defaultStream::error_stream(), 3663 "Native Memory Tracking is not supported in this VM\n"); 3664 return JNI_ERR; 3665 #endif 3666 } 3667 3668 #ifndef PRODUCT 3669 if (match_option(option, "-XX:+PrintFlagsWithComments")) { 3670 JVMFlag::printFlags(tty, true); 3671 vm_exit(0); 3672 } 3673 #endif 3674 } 3675 return JNI_OK; 3676 } 3677 3678 static void print_options(const JavaVMInitArgs *args) { 3679 const char* tail; 3680 for (int index = 0; index < args->nOptions; index++) { 3681 const JavaVMOption *option = args->options + index; 3682 if (match_option(option, "-XX:", &tail)) { 3683 logOption(tail); 3684 } 3685 } 3686 } 3687 3688 bool Arguments::handle_deprecated_print_gc_flags() { 3689 if (PrintGC) { 3690 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead."); 3691 } 3692 if (PrintGCDetails) { 3693 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead."); 3694 } 3695 3696 if (_gc_log_filename != NULL) { 3697 // -Xloggc was used to specify a filename 3698 const char* gc_conf = PrintGCDetails ? "gc*" : "gc"; 3699 3700 LogTarget(Error, logging) target; 3701 LogStream errstream(target); 3702 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream); 3703 } else if (PrintGC || PrintGCDetails) { 3704 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc)); 3705 } 3706 return true; 3707 } 3708 3709 void Arguments::handle_extra_cms_flags(const char* msg) { 3710 SpecialFlag flag; 3711 const char *flag_name = "UseConcMarkSweepGC"; 3712 if (lookup_special_flag(flag_name, flag)) { 3713 handle_aliases_and_deprecation(flag_name, /* print warning */ true); 3714 warning("%s", msg); 3715 } 3716 } 3717 3718 // Parse entry point called from JNI_CreateJavaVM 3719 3720 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) { 3721 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent"); 3722 3723 // Initialize ranges, constraints and writeables 3724 JVMFlagRangeList::init(); 3725 JVMFlagConstraintList::init(); 3726 JVMFlagWriteableList::init(); 3727 3728 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 3729 const char* hotspotrc = ".hotspotrc"; 3730 bool settings_file_specified = false; 3731 bool needs_hotspotrc_warning = false; 3732 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3733 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'"); 3734 3735 // Pointers to current working set of containers 3736 JavaVMInitArgs* cur_cmd_args; 3737 JavaVMInitArgs* cur_java_options_args; 3738 JavaVMInitArgs* cur_java_tool_options_args; 3739 3740 // Containers for modified/expanded options 3741 ScopedVMInitArgs mod_cmd_args("cmd_line_args"); 3742 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3743 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'"); 3744 3745 3746 jint code = 3747 parse_java_tool_options_environment_variable(&initial_java_tool_options_args); 3748 if (code != JNI_OK) { 3749 return code; 3750 } 3751 3752 code = parse_java_options_environment_variable(&initial_java_options_args); 3753 if (code != JNI_OK) { 3754 return code; 3755 } 3756 3757 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(), 3758 &mod_java_tool_options_args, 3759 &cur_java_tool_options_args); 3760 if (code != JNI_OK) { 3761 return code; 3762 } 3763 3764 code = expand_vm_options_as_needed(initial_cmd_args, 3765 &mod_cmd_args, 3766 &cur_cmd_args); 3767 if (code != JNI_OK) { 3768 return code; 3769 } 3770 3771 code = expand_vm_options_as_needed(initial_java_options_args.get(), 3772 &mod_java_options_args, 3773 &cur_java_options_args); 3774 if (code != JNI_OK) { 3775 return code; 3776 } 3777 3778 const char* flags_file = Arguments::get_jvm_flags_file(); 3779 settings_file_specified = (flags_file != NULL); 3780 3781 if (IgnoreUnrecognizedVMOptions) { 3782 cur_cmd_args->ignoreUnrecognized = true; 3783 cur_java_tool_options_args->ignoreUnrecognized = true; 3784 cur_java_options_args->ignoreUnrecognized = true; 3785 } 3786 3787 // Parse specified settings file 3788 if (settings_file_specified) { 3789 if (!process_settings_file(flags_file, true, 3790 cur_cmd_args->ignoreUnrecognized)) { 3791 return JNI_EINVAL; 3792 } 3793 } else { 3794 #ifdef ASSERT 3795 // Parse default .hotspotrc settings file 3796 if (!process_settings_file(".hotspotrc", false, 3797 cur_cmd_args->ignoreUnrecognized)) { 3798 return JNI_EINVAL; 3799 } 3800 #else 3801 struct stat buf; 3802 if (os::stat(hotspotrc, &buf) == 0) { 3803 needs_hotspotrc_warning = true; 3804 } 3805 #endif 3806 } 3807 3808 if (PrintVMOptions) { 3809 print_options(cur_java_tool_options_args); 3810 print_options(cur_cmd_args); 3811 print_options(cur_java_options_args); 3812 } 3813 3814 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 3815 jint result = parse_vm_init_args(cur_java_tool_options_args, 3816 cur_java_options_args, 3817 cur_cmd_args); 3818 3819 if (result != JNI_OK) { 3820 return result; 3821 } 3822 3823 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 3824 SharedArchivePath = get_shared_archive_path(); 3825 if (SharedArchivePath == NULL) { 3826 return JNI_ENOMEM; 3827 } 3828 3829 // Set up VerifySharedSpaces 3830 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 3831 VerifySharedSpaces = true; 3832 } 3833 3834 // Delay warning until here so that we've had a chance to process 3835 // the -XX:-PrintWarnings flag 3836 if (needs_hotspotrc_warning) { 3837 warning("%s file is present but has been ignored. " 3838 "Run with -XX:Flags=%s to load the file.", 3839 hotspotrc, hotspotrc); 3840 } 3841 3842 if (needs_module_property_warning) { 3843 warning("Ignoring system property options whose names match the '-Djdk.module.*'." 3844 " names that are reserved for internal use."); 3845 } 3846 3847 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 3848 UNSUPPORTED_OPTION(UseLargePages); 3849 #endif 3850 3851 ArgumentsExt::report_unsupported_options(); 3852 3853 #ifndef PRODUCT 3854 if (TraceBytecodesAt != 0) { 3855 TraceBytecodes = true; 3856 } 3857 if (CountCompiledCalls) { 3858 if (UseCounterDecay) { 3859 warning("UseCounterDecay disabled because CountCalls is set"); 3860 UseCounterDecay = false; 3861 } 3862 } 3863 #endif // PRODUCT 3864 3865 if (ScavengeRootsInCode == 0) { 3866 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 3867 warning("Forcing ScavengeRootsInCode non-zero"); 3868 } 3869 ScavengeRootsInCode = 1; 3870 } 3871 3872 if (!handle_deprecated_print_gc_flags()) { 3873 return JNI_EINVAL; 3874 } 3875 3876 // Set object alignment values. 3877 set_object_alignment(); 3878 3879 #if !INCLUDE_CDS 3880 if (DumpSharedSpaces || RequireSharedSpaces) { 3881 jio_fprintf(defaultStream::error_stream(), 3882 "Shared spaces are not supported in this VM\n"); 3883 return JNI_ERR; 3884 } 3885 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || 3886 log_is_enabled(Info, cds)) { 3887 warning("Shared spaces are not supported in this VM"); 3888 FLAG_SET_DEFAULT(UseSharedSpaces, false); 3889 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds)); 3890 } 3891 no_shared_spaces("CDS Disabled"); 3892 #endif // INCLUDE_CDS 3893 3894 return JNI_OK; 3895 } 3896 3897 jint Arguments::apply_ergo() { 3898 // Set flags based on ergonomics. 3899 jint result = set_ergonomics_flags(); 3900 if (result != JNI_OK) return result; 3901 3902 // Set heap size based on available physical memory 3903 set_heap_size(); 3904 3905 GCConfig::arguments()->initialize(); 3906 3907 set_shared_spaces_flags(); 3908 3909 // Initialize Metaspace flags and alignments 3910 Metaspace::ergo_initialize(); 3911 3912 // Set compiler flags after GC is selected and GC specific 3913 // flags (LoopStripMiningIter) are set. 3914 CompilerConfig::ergo_initialize(); 3915 3916 // Set bytecode rewriting flags 3917 set_bytecode_flags(); 3918 3919 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 3920 jint code = set_aggressive_opts_flags(); 3921 if (code != JNI_OK) { 3922 return code; 3923 } 3924 3925 // Turn off biased locking for locking debug mode flags, 3926 // which are subtly different from each other but neither works with 3927 // biased locking 3928 if (UseHeavyMonitors 3929 #ifdef COMPILER1 3930 || !UseFastLocking 3931 #endif // COMPILER1 3932 #if INCLUDE_JVMCI 3933 || !JVMCIUseFastLocking 3934 #endif 3935 ) { 3936 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 3937 // flag set to true on command line; warn the user that they 3938 // can't enable biased locking here 3939 warning("Biased Locking is not supported with locking debug flags" 3940 "; ignoring UseBiasedLocking flag." ); 3941 } 3942 UseBiasedLocking = false; 3943 } 3944 3945 #ifdef CC_INTERP 3946 // Clear flags not supported on zero. 3947 FLAG_SET_DEFAULT(ProfileInterpreter, false); 3948 FLAG_SET_DEFAULT(UseBiasedLocking, false); 3949 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 3950 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 3951 #endif // CC_INTERP 3952 3953 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 3954 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 3955 DebugNonSafepoints = true; 3956 } 3957 3958 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 3959 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 3960 } 3961 3962 #ifndef PRODUCT 3963 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 3964 if (use_vm_log()) { 3965 LogVMOutput = true; 3966 } 3967 } 3968 #endif // PRODUCT 3969 3970 if (PrintCommandLineFlags) { 3971 JVMFlag::printSetFlags(tty); 3972 } 3973 3974 // Apply CPU specific policy for the BiasedLocking 3975 if (UseBiasedLocking) { 3976 if (!VM_Version::use_biased_locking() && 3977 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 3978 UseBiasedLocking = false; 3979 } 3980 } 3981 #ifdef COMPILER2 3982 if (!UseBiasedLocking) { 3983 UseOptoBiasInlining = false; 3984 } 3985 #endif 3986 3987 #if defined(IA32) 3988 // Only server compiler can optimize safepoints well enough. 3989 if (!is_server_compilation_mode_vm()) { 3990 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false); 3991 } 3992 #endif 3993 3994 // ThreadLocalHandshakesConstraintFunc handles the constraints. 3995 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) { 3996 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled."); 3997 } else { 3998 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled."); 3999 } 4000 4001 return JNI_OK; 4002 } 4003 4004 jint Arguments::adjust_after_os() { 4005 if (UseNUMA) { 4006 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) { 4007 FLAG_SET_ERGO(bool, UseNUMA, false); 4008 } else if (UseParallelGC || UseParallelOldGC) { 4009 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4010 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4011 } 4012 } 4013 // UseNUMAInterleaving is set to ON for all collectors and 4014 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4015 // such as the parallel collector for Linux and Solaris will 4016 // interleave old gen and survivor spaces on top of NUMA 4017 // allocation policy for the eden space. 4018 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4019 // all platforms and ParallelGC on Windows will interleave all 4020 // of the heap spaces across NUMA nodes. 4021 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4022 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4023 } 4024 } 4025 return JNI_OK; 4026 } 4027 4028 int Arguments::PropertyList_count(SystemProperty* pl) { 4029 int count = 0; 4030 while(pl != NULL) { 4031 count++; 4032 pl = pl->next(); 4033 } 4034 return count; 4035 } 4036 4037 // Return the number of readable properties. 4038 int Arguments::PropertyList_readable_count(SystemProperty* pl) { 4039 int count = 0; 4040 while(pl != NULL) { 4041 if (pl->is_readable()) { 4042 count++; 4043 } 4044 pl = pl->next(); 4045 } 4046 return count; 4047 } 4048 4049 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4050 assert(key != NULL, "just checking"); 4051 SystemProperty* prop; 4052 for (prop = pl; prop != NULL; prop = prop->next()) { 4053 if (strcmp(key, prop->key()) == 0) return prop->value(); 4054 } 4055 return NULL; 4056 } 4057 4058 // Return the value of the requested property provided that it is a readable property. 4059 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) { 4060 assert(key != NULL, "just checking"); 4061 SystemProperty* prop; 4062 // Return the property value if the keys match and the property is not internal or 4063 // it's the special internal property "jdk.boot.class.path.append". 4064 for (prop = pl; prop != NULL; prop = prop->next()) { 4065 if (strcmp(key, prop->key()) == 0) { 4066 if (!prop->internal()) { 4067 return prop->value(); 4068 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) { 4069 return prop->value(); 4070 } else { 4071 // Property is internal and not jdk.boot.class.path.append so return NULL. 4072 return NULL; 4073 } 4074 } 4075 } 4076 return NULL; 4077 } 4078 4079 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4080 int count = 0; 4081 const char* ret_val = NULL; 4082 4083 while(pl != NULL) { 4084 if(count >= index) { 4085 ret_val = pl->key(); 4086 break; 4087 } 4088 count++; 4089 pl = pl->next(); 4090 } 4091 4092 return ret_val; 4093 } 4094 4095 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4096 int count = 0; 4097 char* ret_val = NULL; 4098 4099 while(pl != NULL) { 4100 if(count >= index) { 4101 ret_val = pl->value(); 4102 break; 4103 } 4104 count++; 4105 pl = pl->next(); 4106 } 4107 4108 return ret_val; 4109 } 4110 4111 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4112 SystemProperty* p = *plist; 4113 if (p == NULL) { 4114 *plist = new_p; 4115 } else { 4116 while (p->next() != NULL) { 4117 p = p->next(); 4118 } 4119 p->set_next(new_p); 4120 } 4121 } 4122 4123 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v, 4124 bool writeable, bool internal) { 4125 if (plist == NULL) 4126 return; 4127 4128 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal); 4129 PropertyList_add(plist, new_p); 4130 } 4131 4132 void Arguments::PropertyList_add(SystemProperty *element) { 4133 PropertyList_add(&_system_properties, element); 4134 } 4135 4136 // This add maintains unique property key in the list. 4137 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, 4138 PropertyAppendable append, PropertyWriteable writeable, 4139 PropertyInternal internal) { 4140 if (plist == NULL) 4141 return; 4142 4143 // If property key exist then update with new value. 4144 SystemProperty* prop; 4145 for (prop = *plist; prop != NULL; prop = prop->next()) { 4146 if (strcmp(k, prop->key()) == 0) { 4147 if (append == AppendProperty) { 4148 prop->append_value(v); 4149 } else { 4150 prop->set_value(v); 4151 } 4152 return; 4153 } 4154 } 4155 4156 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty); 4157 } 4158 4159 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4160 // Returns true if all of the source pointed by src has been copied over to 4161 // the destination buffer pointed by buf. Otherwise, returns false. 4162 // Notes: 4163 // 1. If the length (buflen) of the destination buffer excluding the 4164 // NULL terminator character is not long enough for holding the expanded 4165 // pid characters, it also returns false instead of returning the partially 4166 // expanded one. 4167 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4168 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4169 char* buf, size_t buflen) { 4170 const char* p = src; 4171 char* b = buf; 4172 const char* src_end = &src[srclen]; 4173 char* buf_end = &buf[buflen - 1]; 4174 4175 while (p < src_end && b < buf_end) { 4176 if (*p == '%') { 4177 switch (*(++p)) { 4178 case '%': // "%%" ==> "%" 4179 *b++ = *p++; 4180 break; 4181 case 'p': { // "%p" ==> current process id 4182 // buf_end points to the character before the last character so 4183 // that we could write '\0' to the end of the buffer. 4184 size_t buf_sz = buf_end - b + 1; 4185 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4186 4187 // if jio_snprintf fails or the buffer is not long enough to hold 4188 // the expanded pid, returns false. 4189 if (ret < 0 || ret >= (int)buf_sz) { 4190 return false; 4191 } else { 4192 b += ret; 4193 assert(*b == '\0', "fail in copy_expand_pid"); 4194 if (p == src_end && b == buf_end + 1) { 4195 // reach the end of the buffer. 4196 return true; 4197 } 4198 } 4199 p++; 4200 break; 4201 } 4202 default : 4203 *b++ = '%'; 4204 } 4205 } else { 4206 *b++ = *p++; 4207 } 4208 } 4209 *b = '\0'; 4210 return (p == src_end); // return false if not all of the source was copied 4211 }