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