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 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 530 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 531 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 532 { "UseMembar", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 533 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 534 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 535 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 536 { "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 537 538 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in: 539 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 540 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 541 { "TLABStats", JDK_Version::jdk(12), JDK_Version::undefined(), JDK_Version::undefined() }, 542 543 // -------------- Obsolete Flags - sorted by expired_in -------------- 544 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 545 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 546 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 547 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 548 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 549 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 550 { "AssumeMP", JDK_Version::jdk(10), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 551 { "UnlinkSymbolsALot", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 552 { "AllowNonVirtualCalls", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 553 { "PrintSafepointStatistics", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 554 { "PrintSafepointStatisticsTimeout",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 555 { "PrintSafepointStatisticsCount", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 556 { "TransmitErrorReport", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 557 { "ErrorReportServer", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 558 { "EmitSync", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 559 { "SyncVerbose", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 560 { "SyncFlags", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 561 { "SyncKnobs", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 562 { "MonitorInUseLists", JDK_Version::jdk(10), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 563 564 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS 565 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() }, 566 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) }, 567 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) }, 568 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) }, 569 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 570 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 571 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() }, 572 #endif 573 574 { NULL, JDK_Version(0), JDK_Version(0) } 575 }; 576 577 // Flags that are aliases for other flags. 578 typedef struct { 579 const char* alias_name; 580 const char* real_name; 581 } AliasedFlag; 582 583 static AliasedFlag const aliased_jvm_flags[] = { 584 { "DefaultMaxRAMFraction", "MaxRAMFraction" }, 585 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" }, 586 { NULL, NULL} 587 }; 588 589 // NOTE: A compatibility request will be necessary for each alias to be removed. 590 static AliasedLoggingFlag const aliased_logging_flags[] = { 591 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) }, 592 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) }, 593 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) }, 594 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) }, 595 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) }, 596 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) }, 597 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) }, 598 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) }, 599 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) }, 600 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) }, 601 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) }, 602 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) }, 603 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) }, 604 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) }, 605 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) } 606 }; 607 608 #ifndef PRODUCT 609 // These options are removed in jdk9. Remove this code for jdk10. 610 static AliasedFlag const removed_develop_logging_flags[] = { 611 { "TraceClassInitialization", "-Xlog:class+init" }, 612 { "TraceClassLoaderData", "-Xlog:class+loader+data" }, 613 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" }, 614 { "TraceItables", "-Xlog:itables=debug" }, 615 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" }, 616 { "TraceSafepoint", "-Xlog:safepoint=debug" }, 617 { "TraceStartupTime", "-Xlog:startuptime" }, 618 { "TraceVMOperation", "-Xlog:vmoperation=debug" }, 619 { "PrintVtables", "-Xlog:vtables=debug" }, 620 { "VerboseVerification", "-Xlog:verification" }, 621 { NULL, NULL } 622 }; 623 #endif //PRODUCT 624 625 // Return true if "v" is less than "other", where "other" may be "undefined". 626 static bool version_less_than(JDK_Version v, JDK_Version other) { 627 assert(!v.is_undefined(), "must be defined"); 628 if (!other.is_undefined() && v.compare(other) >= 0) { 629 return false; 630 } else { 631 return true; 632 } 633 } 634 635 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag); 636 637 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) { 638 // Allow extensions to have priority 639 if (lookup_special_flag_ext(flag_name, flag)) { 640 return true; 641 } 642 643 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 644 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 645 flag = special_jvm_flags[i]; 646 return true; 647 } 648 } 649 return false; 650 } 651 652 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) { 653 assert(version != NULL, "Must provide a version buffer"); 654 SpecialFlag flag; 655 if (lookup_special_flag(flag_name, flag)) { 656 if (!flag.obsolete_in.is_undefined()) { 657 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 658 *version = flag.obsolete_in; 659 return true; 660 } 661 } 662 } 663 return false; 664 } 665 666 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) { 667 assert(version != NULL, "Must provide a version buffer"); 668 SpecialFlag flag; 669 if (lookup_special_flag(flag_name, flag)) { 670 if (!flag.deprecated_in.is_undefined()) { 671 if (version_less_than(JDK_Version::current(), flag.obsolete_in) && 672 version_less_than(JDK_Version::current(), flag.expired_in)) { 673 *version = flag.deprecated_in; 674 return 1; 675 } else { 676 return -1; 677 } 678 } 679 } 680 return 0; 681 } 682 683 #ifndef PRODUCT 684 const char* Arguments::removed_develop_logging_flag_name(const char* name){ 685 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) { 686 const AliasedFlag& flag = removed_develop_logging_flags[i]; 687 if (strcmp(flag.alias_name, name) == 0) { 688 return flag.real_name; 689 } 690 } 691 return NULL; 692 } 693 #endif // PRODUCT 694 695 const char* Arguments::real_flag_name(const char *flag_name) { 696 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) { 697 const AliasedFlag& flag_status = aliased_jvm_flags[i]; 698 if (strcmp(flag_status.alias_name, flag_name) == 0) { 699 return flag_status.real_name; 700 } 701 } 702 return flag_name; 703 } 704 705 #ifdef ASSERT 706 static bool lookup_special_flag(const char *flag_name, size_t skip_index) { 707 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 708 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 709 return true; 710 } 711 } 712 return false; 713 } 714 715 // Verifies the correctness of the entries in the special_jvm_flags table. 716 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion 717 // version being earlier than the deprecation version, then a warning is issued 718 // and verification fails - by returning false. If it is detected that the table 719 // is out of date, with respect to the current version, then a warning is issued 720 // but verification does not fail. This allows the VM to operate when the version 721 // is first updated, without needing to update all the impacted flags at the 722 // same time. 723 static bool verify_special_jvm_flags() { 724 bool success = true; 725 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 726 const SpecialFlag& flag = special_jvm_flags[i]; 727 if (lookup_special_flag(flag.name, i)) { 728 warning("Duplicate special flag declaration \"%s\"", flag.name); 729 success = false; 730 } 731 if (flag.deprecated_in.is_undefined() && 732 flag.obsolete_in.is_undefined()) { 733 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name); 734 success = false; 735 } 736 737 if (!flag.deprecated_in.is_undefined()) { 738 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) { 739 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name); 740 success = false; 741 } 742 743 if (!version_less_than(flag.deprecated_in, flag.expired_in)) { 744 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name); 745 success = false; 746 } 747 } 748 749 if (!flag.obsolete_in.is_undefined()) { 750 if (!version_less_than(flag.obsolete_in, flag.expired_in)) { 751 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name); 752 success = false; 753 } 754 755 // if flag has become obsolete it should not have a "globals" flag defined anymore. 756 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 757 if (JVMFlag::find_flag(flag.name) != NULL) { 758 // Temporarily disable the warning: 8196739 759 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name); 760 } 761 } 762 } 763 764 if (!flag.expired_in.is_undefined()) { 765 // if flag has become expired it should not have a "globals" flag defined anymore. 766 if (!version_less_than(JDK_Version::current(), flag.expired_in)) { 767 if (JVMFlag::find_flag(flag.name) != NULL) { 768 // Temporarily disable the warning: 8196739 769 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name); 770 } 771 } 772 } 773 774 } 775 return success; 776 } 777 #endif 778 779 // Parses a size specification string. 780 bool Arguments::atojulong(const char *s, julong* result) { 781 julong n = 0; 782 783 // First char must be a digit. Don't allow negative numbers or leading spaces. 784 if (!isdigit(*s)) { 785 return false; 786 } 787 788 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); 789 char* remainder; 790 errno = 0; 791 n = strtoull(s, &remainder, (is_hex ? 16 : 10)); 792 if (errno != 0) { 793 return false; 794 } 795 796 // Fail if no number was read at all or if the remainder contains more than a single non-digit character. 797 if (remainder == s || strlen(remainder) > 1) { 798 return false; 799 } 800 801 switch (*remainder) { 802 case 'T': case 't': 803 *result = n * G * K; 804 // Check for overflow. 805 if (*result/((julong)G * K) != n) return false; 806 return true; 807 case 'G': case 'g': 808 *result = n * G; 809 if (*result/G != n) return false; 810 return true; 811 case 'M': case 'm': 812 *result = n * M; 813 if (*result/M != n) return false; 814 return true; 815 case 'K': case 'k': 816 *result = n * K; 817 if (*result/K != n) return false; 818 return true; 819 case '\0': 820 *result = n; 821 return true; 822 default: 823 return false; 824 } 825 } 826 827 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) { 828 if (size < min_size) return arg_too_small; 829 if (size > max_size) return arg_too_big; 830 return arg_in_range; 831 } 832 833 // Describe an argument out of range error 834 void Arguments::describe_range_error(ArgsRange errcode) { 835 switch(errcode) { 836 case arg_too_big: 837 jio_fprintf(defaultStream::error_stream(), 838 "The specified size exceeds the maximum " 839 "representable size.\n"); 840 break; 841 case arg_too_small: 842 case arg_unreadable: 843 case arg_in_range: 844 // do nothing for now 845 break; 846 default: 847 ShouldNotReachHere(); 848 } 849 } 850 851 static bool set_bool_flag(const char* name, bool value, JVMFlag::Flags origin) { 852 if (JVMFlag::boolAtPut(name, &value, origin) == JVMFlag::SUCCESS) { 853 return true; 854 } else { 855 return false; 856 } 857 } 858 859 static bool set_fp_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) { 860 char* end; 861 errno = 0; 862 double v = strtod(value, &end); 863 if ((errno != 0) || (*end != 0)) { 864 return false; 865 } 866 867 if (JVMFlag::doubleAtPut(name, &v, origin) == JVMFlag::SUCCESS) { 868 return true; 869 } 870 return false; 871 } 872 873 static bool set_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) { 874 julong v; 875 int int_v; 876 intx intx_v; 877 bool is_neg = false; 878 JVMFlag* result = JVMFlag::find_flag(name, strlen(name)); 879 880 if (result == NULL) { 881 return false; 882 } 883 884 // Check the sign first since atojulong() parses only unsigned values. 885 if (*value == '-') { 886 if (!result->is_intx() && !result->is_int()) { 887 return false; 888 } 889 value++; 890 is_neg = true; 891 } 892 if (!Arguments::atojulong(value, &v)) { 893 return false; 894 } 895 if (result->is_int()) { 896 int_v = (int) v; 897 if (is_neg) { 898 int_v = -int_v; 899 } 900 return JVMFlag::intAtPut(result, &int_v, origin) == JVMFlag::SUCCESS; 901 } else if (result->is_uint()) { 902 uint uint_v = (uint) v; 903 return JVMFlag::uintAtPut(result, &uint_v, origin) == JVMFlag::SUCCESS; 904 } else if (result->is_intx()) { 905 intx_v = (intx) v; 906 if (is_neg) { 907 intx_v = -intx_v; 908 } 909 return JVMFlag::intxAtPut(result, &intx_v, origin) == JVMFlag::SUCCESS; 910 } else if (result->is_uintx()) { 911 uintx uintx_v = (uintx) v; 912 return JVMFlag::uintxAtPut(result, &uintx_v, origin) == JVMFlag::SUCCESS; 913 } else if (result->is_uint64_t()) { 914 uint64_t uint64_t_v = (uint64_t) v; 915 return JVMFlag::uint64_tAtPut(result, &uint64_t_v, origin) == JVMFlag::SUCCESS; 916 } else if (result->is_size_t()) { 917 size_t size_t_v = (size_t) v; 918 return JVMFlag::size_tAtPut(result, &size_t_v, origin) == JVMFlag::SUCCESS; 919 } else if (result->is_double()) { 920 double double_v = (double) v; 921 return JVMFlag::doubleAtPut(result, &double_v, origin) == JVMFlag::SUCCESS; 922 } else { 923 return false; 924 } 925 } 926 927 static bool set_string_flag(const char* name, const char* value, JVMFlag::Flags origin) { 928 if (JVMFlag::ccstrAtPut(name, &value, origin) != JVMFlag::SUCCESS) return false; 929 // Contract: JVMFlag always returns a pointer that needs freeing. 930 FREE_C_HEAP_ARRAY(char, value); 931 return true; 932 } 933 934 static bool append_to_string_flag(const char* name, const char* new_value, JVMFlag::Flags origin) { 935 const char* old_value = ""; 936 if (JVMFlag::ccstrAt(name, &old_value) != JVMFlag::SUCCESS) return false; 937 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 938 size_t new_len = strlen(new_value); 939 const char* value; 940 char* free_this_too = NULL; 941 if (old_len == 0) { 942 value = new_value; 943 } else if (new_len == 0) { 944 value = old_value; 945 } else { 946 size_t length = old_len + 1 + new_len + 1; 947 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments); 948 // each new setting adds another LINE to the switch: 949 jio_snprintf(buf, length, "%s\n%s", old_value, new_value); 950 value = buf; 951 free_this_too = buf; 952 } 953 (void) JVMFlag::ccstrAtPut(name, &value, origin); 954 // JVMFlag always returns a pointer that needs freeing. 955 FREE_C_HEAP_ARRAY(char, value); 956 if (free_this_too != NULL) { 957 // JVMFlag made its own copy, so I must delete my own temp. buffer. 958 FREE_C_HEAP_ARRAY(char, free_this_too); 959 } 960 return true; 961 } 962 963 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) { 964 const char* real_name = real_flag_name(arg); 965 JDK_Version since = JDK_Version(); 966 switch (is_deprecated_flag(arg, &since)) { 967 case -1: 968 return NULL; // obsolete or expired, don't process normally 969 case 0: 970 return real_name; 971 case 1: { 972 if (warn) { 973 char version[256]; 974 since.to_string(version, sizeof(version)); 975 if (real_name != arg) { 976 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.", 977 arg, version, real_name); 978 } else { 979 warning("Option %s was deprecated in version %s and will likely be removed in a future release.", 980 arg, version); 981 } 982 } 983 return real_name; 984 } 985 } 986 ShouldNotReachHere(); 987 return NULL; 988 } 989 990 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) { 991 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5}; 992 // Set tagset string buffer at max size of 256, large enough for any alias tagset 993 const int max_tagset_size = 256; 994 int max_tagset_len = max_tagset_size - 1; 995 char tagset_buffer[max_tagset_size]; 996 tagset_buffer[0] = '\0'; 997 998 // Write tag-set for aliased logging option, in string list form 999 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]); 1000 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) { 1001 if (i > 0) { 1002 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer)); 1003 } 1004 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer)); 1005 } 1006 if (!alf.exactMatch) { 1007 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer)); 1008 } 1009 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.", 1010 (on) ? "+" : "-", 1011 name, 1012 tagset_buffer, 1013 (on) ? LogLevel::name(alf.level) : "off"); 1014 } 1015 1016 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){ 1017 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) { 1018 const AliasedLoggingFlag& alf = aliased_logging_flags[i]; 1019 if (strcmp(alf.alias_name, name) == 0) { 1020 log_deprecated_flag(name, on, alf); 1021 return alf; 1022 } 1023 } 1024 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)}; 1025 return a; 1026 } 1027 1028 bool Arguments::parse_argument(const char* arg, JVMFlag::Flags origin) { 1029 1030 // range of acceptable characters spelled out for portability reasons 1031 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 1032 #define BUFLEN 255 1033 char name[BUFLEN+1]; 1034 char dummy; 1035 const char* real_name; 1036 bool warn_if_deprecated = true; 1037 1038 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 1039 AliasedLoggingFlag alf = catch_logging_aliases(name, false); 1040 if (alf.alias_name != NULL){ 1041 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1042 return true; 1043 } 1044 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1045 if (real_name == NULL) { 1046 return false; 1047 } 1048 return set_bool_flag(real_name, false, origin); 1049 } 1050 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 1051 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 1052 if (alf.alias_name != NULL){ 1053 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1054 return true; 1055 } 1056 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1057 if (real_name == NULL) { 1058 return false; 1059 } 1060 return set_bool_flag(real_name, true, origin); 1061 } 1062 1063 char punct; 1064 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 1065 const char* value = strchr(arg, '=') + 1; 1066 JVMFlag* flag; 1067 1068 // this scanf pattern matches both strings (handled here) and numbers (handled later)) 1069 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 1070 if (alf.alias_name != NULL) { 1071 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1072 return true; 1073 } 1074 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1075 if (real_name == NULL) { 1076 return false; 1077 } 1078 flag = JVMFlag::find_flag(real_name); 1079 if (flag != NULL && flag->is_ccstr()) { 1080 if (flag->ccstr_accumulates()) { 1081 return append_to_string_flag(real_name, value, origin); 1082 } else { 1083 if (value[0] == '\0') { 1084 value = NULL; 1085 } 1086 return set_string_flag(real_name, value, origin); 1087 } 1088 } else { 1089 warn_if_deprecated = false; // if arg is deprecated, we've already done warning... 1090 } 1091 } 1092 1093 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 1094 const char* value = strchr(arg, '=') + 1; 1095 // -XX:Foo:=xxx will reset the string flag to the given value. 1096 if (value[0] == '\0') { 1097 value = NULL; 1098 } 1099 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1100 if (real_name == NULL) { 1101 return false; 1102 } 1103 return set_string_flag(real_name, value, origin); 1104 } 1105 1106 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]" 1107 #define SIGNED_NUMBER_RANGE "[-0123456789]" 1108 #define NUMBER_RANGE "[0123456789eE+-]" 1109 char value[BUFLEN + 1]; 1110 char value2[BUFLEN + 1]; 1111 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 1112 // Looks like a floating-point number -- try again with more lenient format string 1113 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 1114 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1115 if (real_name == NULL) { 1116 return false; 1117 } 1118 return set_fp_numeric_flag(real_name, value, origin); 1119 } 1120 } 1121 1122 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 1123 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 1124 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1125 if (real_name == NULL) { 1126 return false; 1127 } 1128 return set_numeric_flag(real_name, value, origin); 1129 } 1130 1131 return false; 1132 } 1133 1134 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 1135 assert(bldarray != NULL, "illegal argument"); 1136 1137 if (arg == NULL) { 1138 return; 1139 } 1140 1141 int new_count = *count + 1; 1142 1143 // expand the array and add arg to the last element 1144 if (*bldarray == NULL) { 1145 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments); 1146 } else { 1147 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments); 1148 } 1149 (*bldarray)[*count] = os::strdup_check_oom(arg); 1150 *count = new_count; 1151 } 1152 1153 void Arguments::build_jvm_args(const char* arg) { 1154 add_string(&_jvm_args_array, &_num_jvm_args, arg); 1155 } 1156 1157 void Arguments::build_jvm_flags(const char* arg) { 1158 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 1159 } 1160 1161 // utility function to return a string that concatenates all 1162 // strings in a given char** array 1163 const char* Arguments::build_resource_string(char** args, int count) { 1164 if (args == NULL || count == 0) { 1165 return NULL; 1166 } 1167 size_t length = 0; 1168 for (int i = 0; i < count; i++) { 1169 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character 1170 } 1171 char* s = NEW_RESOURCE_ARRAY(char, length); 1172 char* dst = s; 1173 for (int j = 0; j < count; j++) { 1174 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character 1175 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character 1176 dst += offset; 1177 length -= offset; 1178 } 1179 return (const char*) s; 1180 } 1181 1182 void Arguments::print_on(outputStream* st) { 1183 st->print_cr("VM Arguments:"); 1184 if (num_jvm_flags() > 0) { 1185 st->print("jvm_flags: "); print_jvm_flags_on(st); 1186 st->cr(); 1187 } 1188 if (num_jvm_args() > 0) { 1189 st->print("jvm_args: "); print_jvm_args_on(st); 1190 st->cr(); 1191 } 1192 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 1193 if (_java_class_path != NULL) { 1194 char* path = _java_class_path->value(); 1195 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 1196 } 1197 st->print_cr("Launcher Type: %s", _sun_java_launcher); 1198 } 1199 1200 void Arguments::print_summary_on(outputStream* st) { 1201 // Print the command line. Environment variables that are helpful for 1202 // reproducing the problem are written later in the hs_err file. 1203 // flags are from setting file 1204 if (num_jvm_flags() > 0) { 1205 st->print_raw("Settings File: "); 1206 print_jvm_flags_on(st); 1207 st->cr(); 1208 } 1209 // args are the command line and environment variable arguments. 1210 st->print_raw("Command Line: "); 1211 if (num_jvm_args() > 0) { 1212 print_jvm_args_on(st); 1213 } 1214 // this is the classfile and any arguments to the java program 1215 if (java_command() != NULL) { 1216 st->print("%s", java_command()); 1217 } 1218 st->cr(); 1219 } 1220 1221 void Arguments::print_jvm_flags_on(outputStream* st) { 1222 if (_num_jvm_flags > 0) { 1223 for (int i=0; i < _num_jvm_flags; i++) { 1224 st->print("%s ", _jvm_flags_array[i]); 1225 } 1226 } 1227 } 1228 1229 void Arguments::print_jvm_args_on(outputStream* st) { 1230 if (_num_jvm_args > 0) { 1231 for (int i=0; i < _num_jvm_args; i++) { 1232 st->print("%s ", _jvm_args_array[i]); 1233 } 1234 } 1235 } 1236 1237 bool Arguments::process_argument(const char* arg, 1238 jboolean ignore_unrecognized, 1239 JVMFlag::Flags origin) { 1240 JDK_Version since = JDK_Version(); 1241 1242 if (parse_argument(arg, origin)) { 1243 return true; 1244 } 1245 1246 // Determine if the flag has '+', '-', or '=' characters. 1247 bool has_plus_minus = (*arg == '+' || *arg == '-'); 1248 const char* const argname = has_plus_minus ? arg + 1 : arg; 1249 1250 size_t arg_len; 1251 const char* equal_sign = strchr(argname, '='); 1252 if (equal_sign == NULL) { 1253 arg_len = strlen(argname); 1254 } else { 1255 arg_len = equal_sign - argname; 1256 } 1257 1258 // Only make the obsolete check for valid arguments. 1259 if (arg_len <= BUFLEN) { 1260 // Construct a string which consists only of the argument name without '+', '-', or '='. 1261 char stripped_argname[BUFLEN+1]; // +1 for '\0' 1262 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0' 1263 if (is_obsolete_flag(stripped_argname, &since)) { 1264 char version[256]; 1265 since.to_string(version, sizeof(version)); 1266 warning("Ignoring option %s; support was removed in %s", stripped_argname, version); 1267 return true; 1268 } 1269 #ifndef PRODUCT 1270 else { 1271 const char* replacement; 1272 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){ 1273 log_warning(arguments)("%s has been removed. Please use %s instead.", 1274 stripped_argname, 1275 replacement); 1276 return false; 1277 } 1278 } 1279 #endif //PRODUCT 1280 } 1281 1282 // For locked flags, report a custom error message if available. 1283 // Otherwise, report the standard unrecognized VM option. 1284 JVMFlag* found_flag = JVMFlag::find_flag((const char*)argname, arg_len, true, true); 1285 if (found_flag != NULL) { 1286 char locked_message_buf[BUFLEN]; 1287 JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN); 1288 if (strlen(locked_message_buf) == 0) { 1289 if (found_flag->is_bool() && !has_plus_minus) { 1290 jio_fprintf(defaultStream::error_stream(), 1291 "Missing +/- setting for VM option '%s'\n", argname); 1292 } else if (!found_flag->is_bool() && has_plus_minus) { 1293 jio_fprintf(defaultStream::error_stream(), 1294 "Unexpected +/- setting in VM option '%s'\n", argname); 1295 } else { 1296 jio_fprintf(defaultStream::error_stream(), 1297 "Improperly specified VM option '%s'\n", argname); 1298 } 1299 } else { 1300 #ifdef PRODUCT 1301 bool mismatched = ((msg_type == JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) || 1302 (msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD)); 1303 if (ignore_unrecognized && mismatched) { 1304 return true; 1305 } 1306 #endif 1307 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 1308 } 1309 } else { 1310 if (ignore_unrecognized) { 1311 return true; 1312 } 1313 jio_fprintf(defaultStream::error_stream(), 1314 "Unrecognized VM option '%s'\n", argname); 1315 JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true); 1316 if (fuzzy_matched != NULL) { 1317 jio_fprintf(defaultStream::error_stream(), 1318 "Did you mean '%s%s%s'? ", 1319 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 1320 fuzzy_matched->_name, 1321 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 1322 } 1323 } 1324 1325 // allow for commandline "commenting out" options like -XX:#+Verbose 1326 return arg[0] == '#'; 1327 } 1328 1329 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 1330 FILE* stream = fopen(file_name, "rb"); 1331 if (stream == NULL) { 1332 if (should_exist) { 1333 jio_fprintf(defaultStream::error_stream(), 1334 "Could not open settings file %s\n", file_name); 1335 return false; 1336 } else { 1337 return true; 1338 } 1339 } 1340 1341 char token[1024]; 1342 int pos = 0; 1343 1344 bool in_white_space = true; 1345 bool in_comment = false; 1346 bool in_quote = false; 1347 char quote_c = 0; 1348 bool result = true; 1349 1350 int c = getc(stream); 1351 while(c != EOF && pos < (int)(sizeof(token)-1)) { 1352 if (in_white_space) { 1353 if (in_comment) { 1354 if (c == '\n') in_comment = false; 1355 } else { 1356 if (c == '#') in_comment = true; 1357 else if (!isspace(c)) { 1358 in_white_space = false; 1359 token[pos++] = c; 1360 } 1361 } 1362 } else { 1363 if (c == '\n' || (!in_quote && isspace(c))) { 1364 // token ends at newline, or at unquoted whitespace 1365 // this allows a way to include spaces in string-valued options 1366 token[pos] = '\0'; 1367 logOption(token); 1368 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE); 1369 build_jvm_flags(token); 1370 pos = 0; 1371 in_white_space = true; 1372 in_quote = false; 1373 } else if (!in_quote && (c == '\'' || c == '"')) { 1374 in_quote = true; 1375 quote_c = c; 1376 } else if (in_quote && (c == quote_c)) { 1377 in_quote = false; 1378 } else { 1379 token[pos++] = c; 1380 } 1381 } 1382 c = getc(stream); 1383 } 1384 if (pos > 0) { 1385 token[pos] = '\0'; 1386 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE); 1387 build_jvm_flags(token); 1388 } 1389 fclose(stream); 1390 return result; 1391 } 1392 1393 //============================================================================================================= 1394 // Parsing of properties (-D) 1395 1396 const char* Arguments::get_property(const char* key) { 1397 return PropertyList_get_value(system_properties(), key); 1398 } 1399 1400 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) { 1401 const char* eq = strchr(prop, '='); 1402 const char* key; 1403 const char* value = ""; 1404 1405 if (eq == NULL) { 1406 // property doesn't have a value, thus use passed string 1407 key = prop; 1408 } else { 1409 // property have a value, thus extract it and save to the 1410 // allocated string 1411 size_t key_len = eq - prop; 1412 char* tmp_key = AllocateHeap(key_len + 1, mtArguments); 1413 1414 jio_snprintf(tmp_key, key_len + 1, "%s", prop); 1415 key = tmp_key; 1416 1417 value = &prop[key_len + 1]; 1418 } 1419 1420 if (strcmp(key, "java.compiler") == 0) { 1421 process_java_compiler_argument(value); 1422 // Record value in Arguments, but let it get passed to Java. 1423 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 1424 strcmp(key, "sun.java.launcher.pid") == 0) { 1425 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1426 // private and are processed in process_sun_java_launcher_properties(); 1427 // the sun.java.launcher property is passed on to the java application 1428 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1429 // append is true, writable is true, internal is false 1430 PropertyList_unique_add(&_system_properties, key, value, AppendProperty, 1431 WriteableProperty, ExternalProperty); 1432 } else { 1433 if (strcmp(key, "sun.java.command") == 0) { 1434 char *old_java_command = _java_command; 1435 _java_command = os::strdup_check_oom(value, mtArguments); 1436 if (old_java_command != NULL) { 1437 os::free(old_java_command); 1438 } 1439 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1440 const char* old_java_vendor_url_bug = _java_vendor_url_bug; 1441 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1442 // its value without going through the property list or making a Java call. 1443 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments); 1444 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) { 1445 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL"); 1446 os::free((void *)old_java_vendor_url_bug); 1447 } 1448 } 1449 1450 // Create new property and add at the end of the list 1451 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal); 1452 } 1453 1454 if (key != prop) { 1455 // SystemProperty copy passed value, thus free previously allocated 1456 // memory 1457 FreeHeap((void *)key); 1458 } 1459 1460 return true; 1461 } 1462 1463 #if INCLUDE_CDS 1464 const char* unsupported_properties[] = { "jdk.module.limitmods", 1465 "jdk.module.upgrade.path", 1466 "jdk.module.patch.0" }; 1467 const char* unsupported_options[] = { "--limit-modules", 1468 "--upgrade-module-path", 1469 "--patch-module" 1470 }; 1471 void Arguments::check_unsupported_dumping_properties() { 1472 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump"); 1473 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be"); 1474 // If a vm option is found in the unsupported_options array, vm will exit with an error message. 1475 SystemProperty* sp = system_properties(); 1476 while (sp != NULL) { 1477 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) { 1478 if (strcmp(sp->key(), unsupported_properties[i]) == 0) { 1479 vm_exit_during_initialization( 1480 "Cannot use the following option when dumping the shared archive", unsupported_options[i]); 1481 } 1482 } 1483 sp = sp->next(); 1484 } 1485 1486 // Check for an exploded module build in use with -Xshare:dump. 1487 if (!has_jimage()) { 1488 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build"); 1489 } 1490 } 1491 1492 bool Arguments::check_unsupported_cds_runtime_properties() { 1493 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}"); 1494 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be"); 1495 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) { 1496 if (get_property(unsupported_properties[i]) != NULL) { 1497 if (RequireSharedSpaces) { 1498 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]); 1499 } 1500 return true; 1501 } 1502 } 1503 return false; 1504 } 1505 #endif 1506 1507 //=========================================================================================================== 1508 // Setting int/mixed/comp mode flags 1509 1510 void Arguments::set_mode_flags(Mode mode) { 1511 // Set up default values for all flags. 1512 // If you add a flag to any of the branches below, 1513 // add a default value for it here. 1514 set_java_compiler(false); 1515 _mode = mode; 1516 1517 // Ensure Agent_OnLoad has the correct initial values. 1518 // This may not be the final mode; mode may change later in onload phase. 1519 PropertyList_unique_add(&_system_properties, "java.vm.info", 1520 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty); 1521 1522 UseInterpreter = true; 1523 UseCompiler = true; 1524 UseLoopCounter = true; 1525 1526 // Default values may be platform/compiler dependent - 1527 // use the saved values 1528 ClipInlining = Arguments::_ClipInlining; 1529 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1530 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1531 BackgroundCompilation = Arguments::_BackgroundCompilation; 1532 if (TieredCompilation) { 1533 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) { 1534 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog; 1535 } 1536 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) { 1537 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold; 1538 } 1539 } 1540 1541 // Change from defaults based on mode 1542 switch (mode) { 1543 default: 1544 ShouldNotReachHere(); 1545 break; 1546 case _int: 1547 UseCompiler = false; 1548 UseLoopCounter = false; 1549 AlwaysCompileLoopMethods = false; 1550 UseOnStackReplacement = false; 1551 break; 1552 case _mixed: 1553 // same as default 1554 break; 1555 case _comp: 1556 UseInterpreter = false; 1557 BackgroundCompilation = false; 1558 ClipInlining = false; 1559 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1560 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1561 // compile a level 4 (C2) and then continue executing it. 1562 if (TieredCompilation) { 1563 Tier3InvokeNotifyFreqLog = 0; 1564 Tier4InvocationThreshold = 0; 1565 } 1566 break; 1567 } 1568 } 1569 1570 // Conflict: required to use shared spaces (-Xshare:on), but 1571 // incompatible command line options were chosen. 1572 static void no_shared_spaces(const char* message) { 1573 if (RequireSharedSpaces) { 1574 jio_fprintf(defaultStream::error_stream(), 1575 "Class data sharing is inconsistent with other specified options.\n"); 1576 vm_exit_during_initialization("Unable to use shared archive", message); 1577 } else { 1578 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1579 } 1580 } 1581 1582 void set_object_alignment() { 1583 // Object alignment. 1584 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1585 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1586 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1587 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1588 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1589 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1590 1591 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1592 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1593 1594 // Oop encoding heap max 1595 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1596 1597 if (SurvivorAlignmentInBytes == 0) { 1598 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1599 } 1600 } 1601 1602 size_t Arguments::max_heap_for_compressed_oops() { 1603 // Avoid sign flip. 1604 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1605 // We need to fit both the NULL page and the heap into the memory budget, while 1606 // keeping alignment constraints of the heap. To guarantee the latter, as the 1607 // NULL page is located before the heap, we pad the NULL page to the conservative 1608 // maximum alignment that the GC may ever impose upon the heap. 1609 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(), 1610 _conservative_max_heap_alignment); 1611 1612 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1613 NOT_LP64(ShouldNotReachHere(); return 0); 1614 } 1615 1616 void Arguments::set_use_compressed_oops() { 1617 #ifndef ZERO 1618 #ifdef _LP64 1619 // MaxHeapSize is not set up properly at this point, but 1620 // the only value that can override MaxHeapSize if we are 1621 // to use UseCompressedOops is InitialHeapSize. 1622 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1623 1624 if (max_heap_size <= max_heap_for_compressed_oops()) { 1625 #if !defined(COMPILER1) || defined(TIERED) 1626 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1627 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1628 } 1629 #endif 1630 } else { 1631 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1632 warning("Max heap size too large for Compressed Oops"); 1633 FLAG_SET_DEFAULT(UseCompressedOops, false); 1634 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1635 } 1636 } 1637 #endif // _LP64 1638 #endif // ZERO 1639 } 1640 1641 1642 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1643 // set_use_compressed_oops(). 1644 void Arguments::set_use_compressed_klass_ptrs() { 1645 #ifndef ZERO 1646 #ifdef _LP64 1647 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1648 if (!UseCompressedOops) { 1649 if (UseCompressedClassPointers) { 1650 warning("UseCompressedClassPointers requires UseCompressedOops"); 1651 } 1652 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1653 } else { 1654 // Turn on UseCompressedClassPointers too 1655 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1656 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1657 } 1658 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1659 if (UseCompressedClassPointers) { 1660 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1661 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1662 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1663 } 1664 } 1665 } 1666 #endif // _LP64 1667 #endif // !ZERO 1668 } 1669 1670 void Arguments::set_conservative_max_heap_alignment() { 1671 // The conservative maximum required alignment for the heap is the maximum of 1672 // the alignments imposed by several sources: any requirements from the heap 1673 // itself, the collector policy and the maximum page size we may run the VM 1674 // with. 1675 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment(); 1676 _conservative_max_heap_alignment = MAX4(heap_alignment, 1677 (size_t)os::vm_allocation_granularity(), 1678 os::max_page_size(), 1679 CollectorPolicy::compute_heap_alignment()); 1680 } 1681 1682 jint Arguments::set_ergonomics_flags() { 1683 GCConfig::initialize(); 1684 1685 set_conservative_max_heap_alignment(); 1686 1687 #ifndef ZERO 1688 #ifdef _LP64 1689 set_use_compressed_oops(); 1690 1691 // set_use_compressed_klass_ptrs() must be called after calling 1692 // set_use_compressed_oops(). 1693 set_use_compressed_klass_ptrs(); 1694 1695 // Also checks that certain machines are slower with compressed oops 1696 // in vm_version initialization code. 1697 #endif // _LP64 1698 #endif // !ZERO 1699 1700 return JNI_OK; 1701 } 1702 1703 julong Arguments::limit_by_allocatable_memory(julong limit) { 1704 julong max_allocatable; 1705 julong result = limit; 1706 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1707 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1708 } 1709 return result; 1710 } 1711 1712 // Use static initialization to get the default before parsing 1713 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1714 1715 void Arguments::set_heap_size() { 1716 julong phys_mem = 1717 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1718 : (julong)MaxRAM; 1719 1720 // Convert deprecated flags 1721 if (FLAG_IS_DEFAULT(MaxRAMPercentage) && 1722 !FLAG_IS_DEFAULT(MaxRAMFraction)) 1723 MaxRAMPercentage = 100.0 / MaxRAMFraction; 1724 1725 if (FLAG_IS_DEFAULT(MinRAMPercentage) && 1726 !FLAG_IS_DEFAULT(MinRAMFraction)) 1727 MinRAMPercentage = 100.0 / MinRAMFraction; 1728 1729 if (FLAG_IS_DEFAULT(InitialRAMPercentage) && 1730 !FLAG_IS_DEFAULT(InitialRAMFraction)) 1731 InitialRAMPercentage = 100.0 / InitialRAMFraction; 1732 1733 // If the maximum heap size has not been set with -Xmx, 1734 // then set it as fraction of the size of physical memory, 1735 // respecting the maximum and minimum sizes of the heap. 1736 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1737 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100); 1738 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100); 1739 if (reasonable_min < MaxHeapSize) { 1740 // Small physical memory, so use a minimum fraction of it for the heap 1741 reasonable_max = reasonable_min; 1742 } else { 1743 // Not-small physical memory, so require a heap at least 1744 // as large as MaxHeapSize 1745 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 1746 } 1747 1748 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 1749 // Limit the heap size to ErgoHeapSizeLimit 1750 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 1751 } 1752 if (UseCompressedOops) { 1753 // Limit the heap size to the maximum possible when using compressed oops 1754 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 1755 1756 // HeapBaseMinAddress can be greater than default but not less than. 1757 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 1758 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 1759 // matches compressed oops printing flags 1760 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT 1761 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT, 1762 DefaultHeapBaseMinAddress, 1763 DefaultHeapBaseMinAddress/G, 1764 HeapBaseMinAddress); 1765 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 1766 } 1767 } 1768 1769 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 1770 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 1771 // but it should be not less than default MaxHeapSize. 1772 max_coop_heap -= HeapBaseMinAddress; 1773 } 1774 reasonable_max = MIN2(reasonable_max, max_coop_heap); 1775 } 1776 reasonable_max = limit_by_allocatable_memory(reasonable_max); 1777 1778 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 1779 // An initial heap size was specified on the command line, 1780 // so be sure that the maximum size is consistent. Done 1781 // after call to limit_by_allocatable_memory because that 1782 // method might reduce the allocation size. 1783 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 1784 } 1785 1786 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 1787 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max); 1788 } 1789 1790 // If the minimum or initial heap_size have not been set or requested to be set 1791 // ergonomically, set them accordingly. 1792 if (InitialHeapSize == 0 || min_heap_size() == 0) { 1793 julong reasonable_minimum = (julong)(OldSize + NewSize); 1794 1795 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 1796 1797 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 1798 1799 if (InitialHeapSize == 0) { 1800 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100); 1801 1802 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 1803 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 1804 1805 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 1806 1807 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial); 1808 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial); 1809 } 1810 // If the minimum heap size has not been set (via -Xms), 1811 // synchronize with InitialHeapSize to avoid errors with the default value. 1812 if (min_heap_size() == 0) { 1813 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize)); 1814 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 1815 } 1816 } 1817 } 1818 1819 // This option inspects the machine and attempts to set various 1820 // parameters to be optimal for long-running, memory allocation 1821 // intensive jobs. It is intended for machines with large 1822 // amounts of cpu and memory. 1823 jint Arguments::set_aggressive_heap_flags() { 1824 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 1825 // VM, but we may not be able to represent the total physical memory 1826 // available (like having 8gb of memory on a box but using a 32bit VM). 1827 // Thus, we need to make sure we're using a julong for intermediate 1828 // calculations. 1829 julong initHeapSize; 1830 julong total_memory = os::physical_memory(); 1831 1832 if (total_memory < (julong) 256 * M) { 1833 jio_fprintf(defaultStream::error_stream(), 1834 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 1835 vm_exit(1); 1836 } 1837 1838 // The heap size is half of available memory, or (at most) 1839 // all of possible memory less 160mb (leaving room for the OS 1840 // when using ISM). This is the maximum; because adaptive sizing 1841 // is turned on below, the actual space used may be smaller. 1842 1843 initHeapSize = MIN2(total_memory / (julong) 2, 1844 total_memory - (julong) 160 * M); 1845 1846 initHeapSize = limit_by_allocatable_memory(initHeapSize); 1847 1848 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1849 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) { 1850 return JNI_EINVAL; 1851 } 1852 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) { 1853 return JNI_EINVAL; 1854 } 1855 // Currently the minimum size and the initial heap sizes are the same. 1856 set_min_heap_size(initHeapSize); 1857 } 1858 if (FLAG_IS_DEFAULT(NewSize)) { 1859 // Make the young generation 3/8ths of the total heap. 1860 if (FLAG_SET_CMDLINE(size_t, NewSize, 1861 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) { 1862 return JNI_EINVAL; 1863 } 1864 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != JVMFlag::SUCCESS) { 1865 return JNI_EINVAL; 1866 } 1867 } 1868 1869 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 1870 FLAG_SET_DEFAULT(UseLargePages, true); 1871 #endif 1872 1873 // Increase some data structure sizes for efficiency 1874 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != JVMFlag::SUCCESS) { 1875 return JNI_EINVAL; 1876 } 1877 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != JVMFlag::SUCCESS) { 1878 return JNI_EINVAL; 1879 } 1880 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != JVMFlag::SUCCESS) { 1881 return JNI_EINVAL; 1882 } 1883 1884 // See the OldPLABSize comment below, but replace 'after promotion' 1885 // with 'after copying'. YoungPLABSize is the size of the survivor 1886 // space per-gc-thread buffers. The default is 4kw. 1887 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words 1888 return JNI_EINVAL; 1889 } 1890 1891 // OldPLABSize is the size of the buffers in the old gen that 1892 // UseParallelGC uses to promote live data that doesn't fit in the 1893 // survivor spaces. At any given time, there's one for each gc thread. 1894 // The default size is 1kw. These buffers are rarely used, since the 1895 // survivor spaces are usually big enough. For specjbb, however, there 1896 // are occasions when there's lots of live data in the young gen 1897 // and we end up promoting some of it. We don't have a definite 1898 // explanation for why bumping OldPLABSize helps, but the theory 1899 // is that a bigger PLAB results in retaining something like the 1900 // original allocation order after promotion, which improves mutator 1901 // locality. A minor effect may be that larger PLABs reduce the 1902 // number of PLAB allocation events during gc. The value of 8kw 1903 // was arrived at by experimenting with specjbb. 1904 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words 1905 return JNI_EINVAL; 1906 } 1907 1908 // Enable parallel GC and adaptive generation sizing 1909 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != JVMFlag::SUCCESS) { 1910 return JNI_EINVAL; 1911 } 1912 1913 // Encourage steady state memory management 1914 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != JVMFlag::SUCCESS) { 1915 return JNI_EINVAL; 1916 } 1917 1918 // This appears to improve mutator locality 1919 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) { 1920 return JNI_EINVAL; 1921 } 1922 1923 // Get around early Solaris scheduling bug 1924 // (affinity vs other jobs on system) 1925 // but disallow DR and offlining (5008695). 1926 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != JVMFlag::SUCCESS) { 1927 return JNI_EINVAL; 1928 } 1929 1930 return JNI_OK; 1931 } 1932 1933 // This must be called after ergonomics. 1934 void Arguments::set_bytecode_flags() { 1935 if (!RewriteBytecodes) { 1936 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1937 } 1938 } 1939 1940 // Aggressive optimization flags -XX:+AggressiveOpts 1941 jint Arguments::set_aggressive_opts_flags() { 1942 #ifdef COMPILER2 1943 if (AggressiveUnboxing) { 1944 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1945 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1946 } else if (!EliminateAutoBox) { 1947 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 1948 AggressiveUnboxing = false; 1949 } 1950 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1951 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1952 } else if (!DoEscapeAnalysis) { 1953 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 1954 AggressiveUnboxing = false; 1955 } 1956 } 1957 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1958 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1959 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1960 } 1961 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1962 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1963 } 1964 1965 // Feed the cache size setting into the JDK 1966 char buffer[1024]; 1967 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 1968 if (!add_property(buffer)) { 1969 return JNI_ENOMEM; 1970 } 1971 } 1972 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 1973 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 1974 } 1975 #endif 1976 1977 if (AggressiveOpts) { 1978 // Sample flag setting code 1979 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1980 // FLAG_SET_DEFAULT(EliminateZeroing, true); 1981 // } 1982 } 1983 1984 return JNI_OK; 1985 } 1986 1987 //=========================================================================================================== 1988 // Parsing of java.compiler property 1989 1990 void Arguments::process_java_compiler_argument(const char* arg) { 1991 // For backwards compatibility, Djava.compiler=NONE or "" 1992 // causes us to switch to -Xint mode UNLESS -Xdebug 1993 // is also specified. 1994 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1995 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1996 } 1997 } 1998 1999 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2000 _sun_java_launcher = os::strdup_check_oom(launcher); 2001 } 2002 2003 bool Arguments::created_by_java_launcher() { 2004 assert(_sun_java_launcher != NULL, "property must have value"); 2005 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2006 } 2007 2008 bool Arguments::sun_java_launcher_is_altjvm() { 2009 return _sun_java_launcher_is_altjvm; 2010 } 2011 2012 //=========================================================================================================== 2013 // Parsing of main arguments 2014 2015 unsigned int addreads_count = 0; 2016 unsigned int addexports_count = 0; 2017 unsigned int addopens_count = 0; 2018 unsigned int addmods_count = 0; 2019 unsigned int patch_mod_count = 0; 2020 2021 // Check the consistency of vm_init_args 2022 bool Arguments::check_vm_args_consistency() { 2023 // Method for adding checks for flag consistency. 2024 // The intent is to warn the user of all possible conflicts, 2025 // before returning an error. 2026 // Note: Needs platform-dependent factoring. 2027 bool status = true; 2028 2029 if (TLABRefillWasteFraction == 0) { 2030 jio_fprintf(defaultStream::error_stream(), 2031 "TLABRefillWasteFraction should be a denominator, " 2032 "not " SIZE_FORMAT "\n", 2033 TLABRefillWasteFraction); 2034 status = false; 2035 } 2036 2037 if (PrintNMTStatistics) { 2038 #if INCLUDE_NMT 2039 if (MemTracker::tracking_level() == NMT_off) { 2040 #endif // INCLUDE_NMT 2041 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2042 PrintNMTStatistics = false; 2043 #if INCLUDE_NMT 2044 } 2045 #endif 2046 } 2047 2048 status = CompilerConfig::check_args_consistency(status); 2049 #if INCLUDE_JVMCI 2050 if (status && EnableJVMCI) { 2051 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true", 2052 AddProperty, UnwriteableProperty, InternalProperty); 2053 if (!create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) { 2054 return false; 2055 } 2056 } 2057 #endif 2058 2059 #ifndef SUPPORT_RESERVED_STACK_AREA 2060 if (StackReservedPages != 0) { 2061 FLAG_SET_CMDLINE(intx, StackReservedPages, 0); 2062 warning("Reserved Stack Area not supported on this platform"); 2063 } 2064 #endif 2065 2066 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) { 2067 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) { 2068 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n"); 2069 } 2070 } 2071 2072 if(!FLAG_IS_DEFAULT(AllocateHeapAt) && !FLAG_IS_DEFAULT(AllocateOldGenAt)) { 2073 jio_fprintf(defaultStream::error_stream(), 2074 "AllocateHeapAt and AllocateOldGenAt cannot be used together.\n"); 2075 status = false; 2076 } 2077 2078 if (!FLAG_IS_DEFAULT(AllocateOldGenAt) && (UseSerialGC || UseConcMarkSweepGC || UseEpsilonGC || UseZGC)) { 2079 jio_fprintf(defaultStream::error_stream(), 2080 "AllocateOldGenAt not supported for selected GC.\n"); 2081 status = false; 2082 } 2083 2084 return status; 2085 } 2086 2087 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2088 const char* option_type) { 2089 if (ignore) return false; 2090 2091 const char* spacer = " "; 2092 if (option_type == NULL) { 2093 option_type = ++spacer; // Set both to the empty string. 2094 } 2095 2096 if (os::obsolete_option(option)) { 2097 jio_fprintf(defaultStream::error_stream(), 2098 "Obsolete %s%soption: %s\n", option_type, spacer, 2099 option->optionString); 2100 return false; 2101 } else { 2102 jio_fprintf(defaultStream::error_stream(), 2103 "Unrecognized %s%soption: %s\n", option_type, spacer, 2104 option->optionString); 2105 return true; 2106 } 2107 } 2108 2109 static const char* user_assertion_options[] = { 2110 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2111 }; 2112 2113 static const char* system_assertion_options[] = { 2114 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2115 }; 2116 2117 bool Arguments::parse_uintx(const char* value, 2118 uintx* uintx_arg, 2119 uintx min_size) { 2120 2121 // Check the sign first since atojulong() parses only unsigned values. 2122 bool value_is_positive = !(*value == '-'); 2123 2124 if (value_is_positive) { 2125 julong n; 2126 bool good_return = atojulong(value, &n); 2127 if (good_return) { 2128 bool above_minimum = n >= min_size; 2129 bool value_is_too_large = n > max_uintx; 2130 2131 if (above_minimum && !value_is_too_large) { 2132 *uintx_arg = n; 2133 return true; 2134 } 2135 } 2136 } 2137 return false; 2138 } 2139 2140 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) { 2141 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2; 2142 char* property = AllocateHeap(prop_len, mtArguments); 2143 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value); 2144 if (ret < 0 || ret >= (int)prop_len) { 2145 FreeHeap(property); 2146 return false; 2147 } 2148 bool added = add_property(property, UnwriteableProperty, internal); 2149 FreeHeap(property); 2150 return added; 2151 } 2152 2153 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) { 2154 const unsigned int props_count_limit = 1000; 2155 const int max_digits = 3; 2156 const int extra_symbols_count = 3; // includes '.', '=', '\0' 2157 2158 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small. 2159 if (count < props_count_limit) { 2160 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count; 2161 char* property = AllocateHeap(prop_len, mtArguments); 2162 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value); 2163 if (ret < 0 || ret >= (int)prop_len) { 2164 FreeHeap(property); 2165 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value); 2166 return false; 2167 } 2168 bool added = add_property(property, UnwriteableProperty, InternalProperty); 2169 FreeHeap(property); 2170 return added; 2171 } 2172 2173 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit); 2174 return false; 2175 } 2176 2177 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2178 julong* long_arg, 2179 julong min_size, 2180 julong max_size) { 2181 if (!atojulong(s, long_arg)) return arg_unreadable; 2182 return check_memory_size(*long_arg, min_size, max_size); 2183 } 2184 2185 // Parse JavaVMInitArgs structure 2186 2187 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 2188 const JavaVMInitArgs *java_options_args, 2189 const JavaVMInitArgs *cmd_line_args) { 2190 bool patch_mod_javabase = false; 2191 2192 // Save default settings for some mode flags 2193 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2194 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2195 Arguments::_ClipInlining = ClipInlining; 2196 Arguments::_BackgroundCompilation = BackgroundCompilation; 2197 if (TieredCompilation) { 2198 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 2199 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 2200 } 2201 2202 // Setup flags for mixed which is the default 2203 set_mode_flags(_mixed); 2204 2205 // Parse args structure generated from JAVA_TOOL_OPTIONS environment 2206 // variable (if present). 2207 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR); 2208 if (result != JNI_OK) { 2209 return result; 2210 } 2211 2212 // Parse args structure generated from the command line flags. 2213 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, JVMFlag::COMMAND_LINE); 2214 if (result != JNI_OK) { 2215 return result; 2216 } 2217 2218 // Parse args structure generated from the _JAVA_OPTIONS environment 2219 // variable (if present) (mimics classic VM) 2220 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR); 2221 if (result != JNI_OK) { 2222 return result; 2223 } 2224 2225 // We need to ensure processor and memory resources have been properly 2226 // configured - which may rely on arguments we just processed - before 2227 // doing the final argument processing. Any argument processing that 2228 // needs to know about processor and memory resources must occur after 2229 // this point. 2230 2231 os::init_container_support(); 2232 2233 // Do final processing now that all arguments have been parsed 2234 result = finalize_vm_init_args(patch_mod_javabase); 2235 if (result != JNI_OK) { 2236 return result; 2237 } 2238 2239 return JNI_OK; 2240 } 2241 2242 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2243 // represents a valid JDWP agent. is_path==true denotes that we 2244 // are dealing with -agentpath (case where name is a path), otherwise with 2245 // -agentlib 2246 bool valid_jdwp_agent(char *name, bool is_path) { 2247 char *_name; 2248 const char *_jdwp = "jdwp"; 2249 size_t _len_jdwp, _len_prefix; 2250 2251 if (is_path) { 2252 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2253 return false; 2254 } 2255 2256 _name++; // skip past last path separator 2257 _len_prefix = strlen(JNI_LIB_PREFIX); 2258 2259 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2260 return false; 2261 } 2262 2263 _name += _len_prefix; 2264 _len_jdwp = strlen(_jdwp); 2265 2266 if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2267 _name += _len_jdwp; 2268 } 2269 else { 2270 return false; 2271 } 2272 2273 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2274 return false; 2275 } 2276 2277 return true; 2278 } 2279 2280 if (strcmp(name, _jdwp) == 0) { 2281 return true; 2282 } 2283 2284 return false; 2285 } 2286 2287 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) { 2288 // --patch-module=<module>=<file>(<pathsep><file>)* 2289 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value"); 2290 // Find the equal sign between the module name and the path specification 2291 const char* module_equal = strchr(patch_mod_tail, '='); 2292 if (module_equal == NULL) { 2293 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n"); 2294 return JNI_ERR; 2295 } else { 2296 // Pick out the module name 2297 size_t module_len = module_equal - patch_mod_tail; 2298 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments); 2299 if (module_name != NULL) { 2300 memcpy(module_name, patch_mod_tail, module_len); 2301 *(module_name + module_len) = '\0'; 2302 // The path piece begins one past the module_equal sign 2303 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase); 2304 FREE_C_HEAP_ARRAY(char, module_name); 2305 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) { 2306 return JNI_ENOMEM; 2307 } 2308 } else { 2309 return JNI_ENOMEM; 2310 } 2311 } 2312 return JNI_OK; 2313 } 2314 2315 // Parse -Xss memory string parameter and convert to ThreadStackSize in K. 2316 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) { 2317 // The min and max sizes match the values in globals.hpp, but scaled 2318 // with K. The values have been chosen so that alignment with page 2319 // size doesn't change the max value, which makes the conversions 2320 // back and forth between Xss value and ThreadStackSize value easier. 2321 // The values have also been chosen to fit inside a 32-bit signed type. 2322 const julong min_ThreadStackSize = 0; 2323 const julong max_ThreadStackSize = 1 * M; 2324 2325 const julong min_size = min_ThreadStackSize * K; 2326 const julong max_size = max_ThreadStackSize * K; 2327 2328 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption"); 2329 2330 julong size = 0; 2331 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size); 2332 if (errcode != arg_in_range) { 2333 bool silent = (option == NULL); // Allow testing to silence error messages 2334 if (!silent) { 2335 jio_fprintf(defaultStream::error_stream(), 2336 "Invalid thread stack size: %s\n", option->optionString); 2337 describe_range_error(errcode); 2338 } 2339 return JNI_EINVAL; 2340 } 2341 2342 // Internally track ThreadStackSize in units of 1024 bytes. 2343 const julong size_aligned = align_up(size, K); 2344 assert(size <= size_aligned, 2345 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT, 2346 size, size_aligned); 2347 2348 const julong size_in_K = size_aligned / K; 2349 assert(size_in_K < (julong)max_intx, 2350 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT, 2351 size_in_K); 2352 2353 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow. 2354 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size()); 2355 assert(max_expanded < max_uintx && max_expanded >= size_in_K, 2356 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT, 2357 max_expanded, size_in_K); 2358 2359 *out_ThreadStackSize = (intx)size_in_K; 2360 2361 return JNI_OK; 2362 } 2363 2364 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin) { 2365 // For match_option to return remaining or value part of option string 2366 const char* tail; 2367 2368 // iterate over arguments 2369 for (int index = 0; index < args->nOptions; index++) { 2370 bool is_absolute_path = false; // for -agentpath vs -agentlib 2371 2372 const JavaVMOption* option = args->options + index; 2373 2374 if (!match_option(option, "-Djava.class.path", &tail) && 2375 !match_option(option, "-Dsun.java.command", &tail) && 2376 !match_option(option, "-Dsun.java.launcher", &tail)) { 2377 2378 // add all jvm options to the jvm_args string. This string 2379 // is used later to set the java.vm.args PerfData string constant. 2380 // the -Djava.class.path and the -Dsun.java.command options are 2381 // omitted from jvm_args string as each have their own PerfData 2382 // string constant object. 2383 build_jvm_args(option->optionString); 2384 } 2385 2386 // -verbose:[class/module/gc/jni] 2387 if (match_option(option, "-verbose", &tail)) { 2388 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2389 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load)); 2390 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload)); 2391 } else if (!strcmp(tail, ":module")) { 2392 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load)); 2393 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload)); 2394 } else if (!strcmp(tail, ":gc")) { 2395 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); 2396 } else if (!strcmp(tail, ":jni")) { 2397 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != JVMFlag::SUCCESS) { 2398 return JNI_EINVAL; 2399 } 2400 } 2401 // -da / -ea / -disableassertions / -enableassertions 2402 // These accept an optional class/package name separated by a colon, e.g., 2403 // -da:java.lang.Thread. 2404 } else if (match_option(option, user_assertion_options, &tail, true)) { 2405 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2406 if (*tail == '\0') { 2407 JavaAssertions::setUserClassDefault(enable); 2408 } else { 2409 assert(*tail == ':', "bogus match by match_option()"); 2410 JavaAssertions::addOption(tail + 1, enable); 2411 } 2412 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2413 } else if (match_option(option, system_assertion_options, &tail, false)) { 2414 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2415 JavaAssertions::setSystemClassDefault(enable); 2416 // -bootclasspath: 2417 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2418 jio_fprintf(defaultStream::output_stream(), 2419 "-Xbootclasspath is no longer a supported option.\n"); 2420 return JNI_EINVAL; 2421 // -bootclasspath/a: 2422 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2423 Arguments::append_sysclasspath(tail); 2424 // -bootclasspath/p: 2425 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2426 jio_fprintf(defaultStream::output_stream(), 2427 "-Xbootclasspath/p is no longer a supported option.\n"); 2428 return JNI_EINVAL; 2429 // -Xrun 2430 } else if (match_option(option, "-Xrun", &tail)) { 2431 if (tail != NULL) { 2432 const char* pos = strchr(tail, ':'); 2433 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2434 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments); 2435 jio_snprintf(name, len + 1, "%s", tail); 2436 2437 char *options = NULL; 2438 if(pos != NULL) { 2439 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2440 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2); 2441 } 2442 #if !INCLUDE_JVMTI 2443 if (strcmp(name, "jdwp") == 0) { 2444 jio_fprintf(defaultStream::error_stream(), 2445 "Debugging agents are not supported in this VM\n"); 2446 return JNI_ERR; 2447 } 2448 #endif // !INCLUDE_JVMTI 2449 add_init_library(name, options); 2450 } 2451 } else if (match_option(option, "--add-reads=", &tail)) { 2452 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) { 2453 return JNI_ENOMEM; 2454 } 2455 } else if (match_option(option, "--add-exports=", &tail)) { 2456 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) { 2457 return JNI_ENOMEM; 2458 } 2459 } else if (match_option(option, "--add-opens=", &tail)) { 2460 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) { 2461 return JNI_ENOMEM; 2462 } 2463 } else if (match_option(option, "--add-modules=", &tail)) { 2464 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) { 2465 return JNI_ENOMEM; 2466 } 2467 } else if (match_option(option, "--limit-modules=", &tail)) { 2468 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) { 2469 return JNI_ENOMEM; 2470 } 2471 } else if (match_option(option, "--module-path=", &tail)) { 2472 if (!create_property("jdk.module.path", tail, ExternalProperty)) { 2473 return JNI_ENOMEM; 2474 } 2475 } else if (match_option(option, "--upgrade-module-path=", &tail)) { 2476 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) { 2477 return JNI_ENOMEM; 2478 } 2479 } else if (match_option(option, "--patch-module=", &tail)) { 2480 // --patch-module=<module>=<file>(<pathsep><file>)* 2481 int res = process_patch_mod_option(tail, patch_mod_javabase); 2482 if (res != JNI_OK) { 2483 return res; 2484 } 2485 } else if (match_option(option, "--illegal-access=", &tail)) { 2486 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) { 2487 return JNI_ENOMEM; 2488 } 2489 // -agentlib and -agentpath 2490 } else if (match_option(option, "-agentlib:", &tail) || 2491 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2492 if(tail != NULL) { 2493 const char* pos = strchr(tail, '='); 2494 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2495 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len); 2496 name[len] = '\0'; 2497 2498 char *options = NULL; 2499 if(pos != NULL) { 2500 options = os::strdup_check_oom(pos + 1, mtArguments); 2501 } 2502 #if !INCLUDE_JVMTI 2503 if (valid_jdwp_agent(name, is_absolute_path)) { 2504 jio_fprintf(defaultStream::error_stream(), 2505 "Debugging agents are not supported in this VM\n"); 2506 return JNI_ERR; 2507 } 2508 #endif // !INCLUDE_JVMTI 2509 add_init_agent(name, options, is_absolute_path); 2510 } 2511 // -javaagent 2512 } else if (match_option(option, "-javaagent:", &tail)) { 2513 #if !INCLUDE_JVMTI 2514 jio_fprintf(defaultStream::error_stream(), 2515 "Instrumentation agents are not supported in this VM\n"); 2516 return JNI_ERR; 2517 #else 2518 if (tail != NULL) { 2519 size_t length = strlen(tail) + 1; 2520 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments); 2521 jio_snprintf(options, length, "%s", tail); 2522 add_instrument_agent("instrument", options, false); 2523 // java agents need module java.instrument 2524 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) { 2525 return JNI_ENOMEM; 2526 } 2527 } 2528 #endif // !INCLUDE_JVMTI 2529 // --enable_preview 2530 } else if (match_option(option, "--enable-preview")) { 2531 set_enable_preview(); 2532 // -Xnoclassgc 2533 } else if (match_option(option, "-Xnoclassgc")) { 2534 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != JVMFlag::SUCCESS) { 2535 return JNI_EINVAL; 2536 } 2537 // -Xconcgc 2538 } else if (match_option(option, "-Xconcgc")) { 2539 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != JVMFlag::SUCCESS) { 2540 return JNI_EINVAL; 2541 } 2542 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC"); 2543 // -Xnoconcgc 2544 } else if (match_option(option, "-Xnoconcgc")) { 2545 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != JVMFlag::SUCCESS) { 2546 return JNI_EINVAL; 2547 } 2548 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC"); 2549 // -Xbatch 2550 } else if (match_option(option, "-Xbatch")) { 2551 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) { 2552 return JNI_EINVAL; 2553 } 2554 // -Xmn for compatibility with other JVM vendors 2555 } else if (match_option(option, "-Xmn", &tail)) { 2556 julong long_initial_young_size = 0; 2557 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2558 if (errcode != arg_in_range) { 2559 jio_fprintf(defaultStream::error_stream(), 2560 "Invalid initial young generation size: %s\n", option->optionString); 2561 describe_range_error(errcode); 2562 return JNI_EINVAL; 2563 } 2564 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) { 2565 return JNI_EINVAL; 2566 } 2567 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) { 2568 return JNI_EINVAL; 2569 } 2570 // -Xms 2571 } else if (match_option(option, "-Xms", &tail)) { 2572 julong long_initial_heap_size = 0; 2573 // an initial heap size of 0 means automatically determine 2574 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2575 if (errcode != arg_in_range) { 2576 jio_fprintf(defaultStream::error_stream(), 2577 "Invalid initial heap size: %s\n", option->optionString); 2578 describe_range_error(errcode); 2579 return JNI_EINVAL; 2580 } 2581 set_min_heap_size((size_t)long_initial_heap_size); 2582 // Currently the minimum size and the initial heap sizes are the same. 2583 // Can be overridden with -XX:InitialHeapSize. 2584 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != JVMFlag::SUCCESS) { 2585 return JNI_EINVAL; 2586 } 2587 // -Xmx 2588 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2589 julong long_max_heap_size = 0; 2590 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2591 if (errcode != arg_in_range) { 2592 jio_fprintf(defaultStream::error_stream(), 2593 "Invalid maximum heap size: %s\n", option->optionString); 2594 describe_range_error(errcode); 2595 return JNI_EINVAL; 2596 } 2597 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) { 2598 return JNI_EINVAL; 2599 } 2600 // Xmaxf 2601 } else if (match_option(option, "-Xmaxf", &tail)) { 2602 char* err; 2603 int maxf = (int)(strtod(tail, &err) * 100); 2604 if (*err != '\0' || *tail == '\0') { 2605 jio_fprintf(defaultStream::error_stream(), 2606 "Bad max heap free percentage size: %s\n", 2607 option->optionString); 2608 return JNI_EINVAL; 2609 } else { 2610 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) { 2611 return JNI_EINVAL; 2612 } 2613 } 2614 // Xminf 2615 } else if (match_option(option, "-Xminf", &tail)) { 2616 char* err; 2617 int minf = (int)(strtod(tail, &err) * 100); 2618 if (*err != '\0' || *tail == '\0') { 2619 jio_fprintf(defaultStream::error_stream(), 2620 "Bad min heap free percentage size: %s\n", 2621 option->optionString); 2622 return JNI_EINVAL; 2623 } else { 2624 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) { 2625 return JNI_EINVAL; 2626 } 2627 } 2628 // -Xss 2629 } else if (match_option(option, "-Xss", &tail)) { 2630 intx value = 0; 2631 jint err = parse_xss(option, tail, &value); 2632 if (err != JNI_OK) { 2633 return err; 2634 } 2635 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != JVMFlag::SUCCESS) { 2636 return JNI_EINVAL; 2637 } 2638 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2639 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2640 julong long_ReservedCodeCacheSize = 0; 2641 2642 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2643 if (errcode != arg_in_range) { 2644 jio_fprintf(defaultStream::error_stream(), 2645 "Invalid maximum code cache size: %s.\n", option->optionString); 2646 return JNI_EINVAL; 2647 } 2648 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) { 2649 return JNI_EINVAL; 2650 } 2651 // -green 2652 } else if (match_option(option, "-green")) { 2653 jio_fprintf(defaultStream::error_stream(), 2654 "Green threads support not available\n"); 2655 return JNI_EINVAL; 2656 // -native 2657 } else if (match_option(option, "-native")) { 2658 // HotSpot always uses native threads, ignore silently for compatibility 2659 // -Xrs 2660 } else if (match_option(option, "-Xrs")) { 2661 // Classic/EVM option, new functionality 2662 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != JVMFlag::SUCCESS) { 2663 return JNI_EINVAL; 2664 } 2665 // -Xprof 2666 } else if (match_option(option, "-Xprof")) { 2667 char version[256]; 2668 // Obsolete in JDK 10 2669 JDK_Version::jdk(10).to_string(version, sizeof(version)); 2670 warning("Ignoring option %s; support was removed in %s", option->optionString, version); 2671 // -Xconcurrentio 2672 } else if (match_option(option, "-Xconcurrentio")) { 2673 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != JVMFlag::SUCCESS) { 2674 return JNI_EINVAL; 2675 } 2676 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) { 2677 return JNI_EINVAL; 2678 } 2679 SafepointSynchronize::set_defer_thr_suspend_loop_count(); 2680 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != JVMFlag::SUCCESS) { 2681 return JNI_EINVAL; 2682 } 2683 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != JVMFlag::SUCCESS) { // 20Kb per thread added to new generation 2684 return JNI_EINVAL; 2685 } 2686 2687 // -Xinternalversion 2688 } else if (match_option(option, "-Xinternalversion")) { 2689 jio_fprintf(defaultStream::output_stream(), "%s\n", 2690 VM_Version::internal_vm_info_string()); 2691 vm_exit(0); 2692 #ifndef PRODUCT 2693 // -Xprintflags 2694 } else if (match_option(option, "-Xprintflags")) { 2695 JVMFlag::printFlags(tty, false); 2696 vm_exit(0); 2697 #endif 2698 // -D 2699 } else if (match_option(option, "-D", &tail)) { 2700 const char* value; 2701 if (match_option(option, "-Djava.endorsed.dirs=", &value) && 2702 *value!= '\0' && strcmp(value, "\"\"") != 0) { 2703 // abort if -Djava.endorsed.dirs is set 2704 jio_fprintf(defaultStream::output_stream(), 2705 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n" 2706 "in modular form will be supported via the concept of upgradeable modules.\n", value); 2707 return JNI_EINVAL; 2708 } 2709 if (match_option(option, "-Djava.ext.dirs=", &value) && 2710 *value != '\0' && strcmp(value, "\"\"") != 0) { 2711 // abort if -Djava.ext.dirs is set 2712 jio_fprintf(defaultStream::output_stream(), 2713 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value); 2714 return JNI_EINVAL; 2715 } 2716 // Check for module related properties. They must be set using the modules 2717 // options. For example: use "--add-modules=java.sql", not 2718 // "-Djdk.module.addmods=java.sql" 2719 if (is_internal_module_property(option->optionString + 2)) { 2720 needs_module_property_warning = true; 2721 continue; 2722 } 2723 2724 if (!add_property(tail)) { 2725 return JNI_ENOMEM; 2726 } 2727 // Out of the box management support 2728 if (match_option(option, "-Dcom.sun.management", &tail)) { 2729 #if INCLUDE_MANAGEMENT 2730 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != JVMFlag::SUCCESS) { 2731 return JNI_EINVAL; 2732 } 2733 // management agent in module jdk.management.agent 2734 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) { 2735 return JNI_ENOMEM; 2736 } 2737 #else 2738 jio_fprintf(defaultStream::output_stream(), 2739 "-Dcom.sun.management is not supported in this VM.\n"); 2740 return JNI_ERR; 2741 #endif 2742 } 2743 // -Xint 2744 } else if (match_option(option, "-Xint")) { 2745 set_mode_flags(_int); 2746 // -Xmixed 2747 } else if (match_option(option, "-Xmixed")) { 2748 set_mode_flags(_mixed); 2749 // -Xcomp 2750 } else if (match_option(option, "-Xcomp")) { 2751 // for testing the compiler; turn off all flags that inhibit compilation 2752 set_mode_flags(_comp); 2753 // -Xshare:dump 2754 } else if (match_option(option, "-Xshare:dump")) { 2755 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != JVMFlag::SUCCESS) { 2756 return JNI_EINVAL; 2757 } 2758 set_mode_flags(_int); // Prevent compilation, which creates objects 2759 // -Xshare:on 2760 } else if (match_option(option, "-Xshare:on")) { 2761 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) { 2762 return JNI_EINVAL; 2763 } 2764 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) { 2765 return JNI_EINVAL; 2766 } 2767 // -Xshare:auto 2768 } else if (match_option(option, "-Xshare:auto")) { 2769 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) { 2770 return JNI_EINVAL; 2771 } 2772 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) { 2773 return JNI_EINVAL; 2774 } 2775 // -Xshare:off 2776 } else if (match_option(option, "-Xshare:off")) { 2777 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != JVMFlag::SUCCESS) { 2778 return JNI_EINVAL; 2779 } 2780 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) { 2781 return JNI_EINVAL; 2782 } 2783 // -Xverify 2784 } else if (match_option(option, "-Xverify", &tail)) { 2785 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 2786 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) { 2787 return JNI_EINVAL; 2788 } 2789 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) { 2790 return JNI_EINVAL; 2791 } 2792 } else if (strcmp(tail, ":remote") == 0) { 2793 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) { 2794 return JNI_EINVAL; 2795 } 2796 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) { 2797 return JNI_EINVAL; 2798 } 2799 } else if (strcmp(tail, ":none") == 0) { 2800 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) { 2801 return JNI_EINVAL; 2802 } 2803 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) { 2804 return JNI_EINVAL; 2805 } 2806 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 2807 return JNI_EINVAL; 2808 } 2809 // -Xdebug 2810 } else if (match_option(option, "-Xdebug")) { 2811 // note this flag has been used, then ignore 2812 set_xdebug_mode(true); 2813 // -Xnoagent 2814 } else if (match_option(option, "-Xnoagent")) { 2815 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 2816 } else if (match_option(option, "-Xloggc:", &tail)) { 2817 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename> 2818 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail); 2819 _gc_log_filename = os::strdup_check_oom(tail); 2820 } else if (match_option(option, "-Xlog", &tail)) { 2821 bool ret = false; 2822 if (strcmp(tail, ":help") == 0) { 2823 fileStream stream(defaultStream::output_stream()); 2824 LogConfiguration::print_command_line_help(&stream); 2825 vm_exit(0); 2826 } else if (strcmp(tail, ":disable") == 0) { 2827 LogConfiguration::disable_logging(); 2828 ret = true; 2829 } else if (*tail == '\0') { 2830 ret = LogConfiguration::parse_command_line_arguments(); 2831 assert(ret, "-Xlog without arguments should never fail to parse"); 2832 } else if (*tail == ':') { 2833 ret = LogConfiguration::parse_command_line_arguments(tail + 1); 2834 } 2835 if (ret == false) { 2836 jio_fprintf(defaultStream::error_stream(), 2837 "Invalid -Xlog option '-Xlog%s', see error log for details.\n", 2838 tail); 2839 return JNI_EINVAL; 2840 } 2841 // JNI hooks 2842 } else if (match_option(option, "-Xcheck", &tail)) { 2843 if (!strcmp(tail, ":jni")) { 2844 #if !INCLUDE_JNI_CHECK 2845 warning("JNI CHECKING is not supported in this VM"); 2846 #else 2847 CheckJNICalls = true; 2848 #endif // INCLUDE_JNI_CHECK 2849 } else if (is_bad_option(option, args->ignoreUnrecognized, 2850 "check")) { 2851 return JNI_EINVAL; 2852 } 2853 } else if (match_option(option, "vfprintf")) { 2854 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 2855 } else if (match_option(option, "exit")) { 2856 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 2857 } else if (match_option(option, "abort")) { 2858 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 2859 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 2860 // and the last option wins. 2861 } else if (match_option(option, "-XX:+NeverTenure")) { 2862 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != JVMFlag::SUCCESS) { 2863 return JNI_EINVAL; 2864 } 2865 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) { 2866 return JNI_EINVAL; 2867 } 2868 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != JVMFlag::SUCCESS) { 2869 return JNI_EINVAL; 2870 } 2871 } else if (match_option(option, "-XX:+AlwaysTenure")) { 2872 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) { 2873 return JNI_EINVAL; 2874 } 2875 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) { 2876 return JNI_EINVAL; 2877 } 2878 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) { 2879 return JNI_EINVAL; 2880 } 2881 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 2882 uintx max_tenuring_thresh = 0; 2883 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) { 2884 jio_fprintf(defaultStream::error_stream(), 2885 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail); 2886 return JNI_EINVAL; 2887 } 2888 2889 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) { 2890 return JNI_EINVAL; 2891 } 2892 2893 if (MaxTenuringThreshold == 0) { 2894 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) { 2895 return JNI_EINVAL; 2896 } 2897 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) { 2898 return JNI_EINVAL; 2899 } 2900 } else { 2901 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) { 2902 return JNI_EINVAL; 2903 } 2904 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) { 2905 return JNI_EINVAL; 2906 } 2907 } 2908 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) { 2909 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) { 2910 return JNI_EINVAL; 2911 } 2912 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) { 2913 return JNI_EINVAL; 2914 } 2915 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) { 2916 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) { 2917 return JNI_EINVAL; 2918 } 2919 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) { 2920 return JNI_EINVAL; 2921 } 2922 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) { 2923 #if defined(DTRACE_ENABLED) 2924 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != JVMFlag::SUCCESS) { 2925 return JNI_EINVAL; 2926 } 2927 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != JVMFlag::SUCCESS) { 2928 return JNI_EINVAL; 2929 } 2930 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != JVMFlag::SUCCESS) { 2931 return JNI_EINVAL; 2932 } 2933 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != JVMFlag::SUCCESS) { 2934 return JNI_EINVAL; 2935 } 2936 #else // defined(DTRACE_ENABLED) 2937 jio_fprintf(defaultStream::error_stream(), 2938 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 2939 return JNI_EINVAL; 2940 #endif // defined(DTRACE_ENABLED) 2941 #ifdef ASSERT 2942 } else if (match_option(option, "-XX:+FullGCALot")) { 2943 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != JVMFlag::SUCCESS) { 2944 return JNI_EINVAL; 2945 } 2946 // disable scavenge before parallel mark-compact 2947 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) { 2948 return JNI_EINVAL; 2949 } 2950 #endif 2951 #if !INCLUDE_MANAGEMENT 2952 } else if (match_option(option, "-XX:+ManagementServer")) { 2953 jio_fprintf(defaultStream::error_stream(), 2954 "ManagementServer is not supported in this VM.\n"); 2955 return JNI_ERR; 2956 #endif // INCLUDE_MANAGEMENT 2957 #if INCLUDE_JFR 2958 } else if (match_jfr_option(&option)) { 2959 return JNI_EINVAL; 2960 #endif 2961 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 2962 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have 2963 // already been handled 2964 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) && 2965 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) { 2966 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 2967 return JNI_EINVAL; 2968 } 2969 } 2970 // Unknown option 2971 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 2972 return JNI_ERR; 2973 } 2974 } 2975 2976 // PrintSharedArchiveAndExit will turn on 2977 // -Xshare:on 2978 // -Xlog:class+path=info 2979 if (PrintSharedArchiveAndExit) { 2980 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) { 2981 return JNI_EINVAL; 2982 } 2983 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) { 2984 return JNI_EINVAL; 2985 } 2986 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path)); 2987 } 2988 2989 // Change the default value for flags which have different default values 2990 // when working with older JDKs. 2991 #ifdef LINUX 2992 if (JDK_Version::current().compare_major(6) <= 0 && 2993 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 2994 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 2995 } 2996 #endif // LINUX 2997 fix_appclasspath(); 2998 return JNI_OK; 2999 } 3000 3001 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) { 3002 // For java.base check for duplicate --patch-module options being specified on the command line. 3003 // This check is only required for java.base, all other duplicate module specifications 3004 // will be checked during module system initialization. The module system initialization 3005 // will throw an ExceptionInInitializerError if this situation occurs. 3006 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 3007 if (*patch_mod_javabase) { 3008 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module"); 3009 } else { 3010 *patch_mod_javabase = true; 3011 } 3012 } 3013 3014 // Create GrowableArray lazily, only if --patch-module has been specified 3015 if (_patch_mod_prefix == NULL) { 3016 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true); 3017 } 3018 3019 _patch_mod_prefix->push(new ModulePatchPath(module_name, path)); 3020 } 3021 3022 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3023 // 3024 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3025 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3026 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3027 // path is treated as the current directory. 3028 // 3029 // This causes problems with CDS, which requires that all directories specified in the classpath 3030 // must be empty. In most cases, applications do NOT want to load classes from the current 3031 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3032 // scripts compatible with CDS. 3033 void Arguments::fix_appclasspath() { 3034 if (IgnoreEmptyClassPaths) { 3035 const char separator = *os::path_separator(); 3036 const char* src = _java_class_path->value(); 3037 3038 // skip over all the leading empty paths 3039 while (*src == separator) { 3040 src ++; 3041 } 3042 3043 char* copy = os::strdup_check_oom(src, mtArguments); 3044 3045 // trim all trailing empty paths 3046 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3047 *tail = '\0'; 3048 } 3049 3050 char from[3] = {separator, separator, '\0'}; 3051 char to [2] = {separator, '\0'}; 3052 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3053 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3054 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3055 } 3056 3057 _java_class_path->set_writeable_value(copy); 3058 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3059 } 3060 } 3061 3062 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) { 3063 // check if the default lib/endorsed directory exists; if so, error 3064 char path[JVM_MAXPATHLEN]; 3065 const char* fileSep = os::file_separator(); 3066 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); 3067 3068 DIR* dir = os::opendir(path); 3069 if (dir != NULL) { 3070 jio_fprintf(defaultStream::output_stream(), 3071 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n" 3072 "in modular form will be supported via the concept of upgradeable modules.\n"); 3073 os::closedir(dir); 3074 return JNI_ERR; 3075 } 3076 3077 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); 3078 dir = os::opendir(path); 3079 if (dir != NULL) { 3080 jio_fprintf(defaultStream::output_stream(), 3081 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; " 3082 "Use -classpath instead.\n."); 3083 os::closedir(dir); 3084 return JNI_ERR; 3085 } 3086 3087 // This must be done after all arguments have been processed 3088 // and the container support has been initialized since AggressiveHeap 3089 // relies on the amount of total memory available. 3090 if (AggressiveHeap) { 3091 jint result = set_aggressive_heap_flags(); 3092 if (result != JNI_OK) { 3093 return result; 3094 } 3095 } 3096 3097 // This must be done after all arguments have been processed. 3098 // java_compiler() true means set to "NONE" or empty. 3099 if (java_compiler() && !xdebug_mode()) { 3100 // For backwards compatibility, we switch to interpreted mode if 3101 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3102 // not specified. 3103 set_mode_flags(_int); 3104 } 3105 3106 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode), 3107 // but like -Xint, leave compilation thresholds unaffected. 3108 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well. 3109 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) { 3110 set_mode_flags(_int); 3111 } 3112 3113 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3114 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3115 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3116 } 3117 3118 #if !COMPILER2_OR_JVMCI 3119 // Don't degrade server performance for footprint 3120 if (FLAG_IS_DEFAULT(UseLargePages) && 3121 MaxHeapSize < LargePageHeapSizeThreshold) { 3122 // No need for large granularity pages w/small heaps. 3123 // Note that large pages are enabled/disabled for both the 3124 // Java heap and the code cache. 3125 FLAG_SET_DEFAULT(UseLargePages, false); 3126 } 3127 3128 UNSUPPORTED_OPTION(ProfileInterpreter); 3129 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter)); 3130 #endif 3131 3132 #ifndef TIERED 3133 // Tiered compilation is undefined. 3134 UNSUPPORTED_OPTION(TieredCompilation); 3135 #endif 3136 3137 if (!check_vm_args_consistency()) { 3138 return JNI_ERR; 3139 } 3140 3141 #if INCLUDE_CDS 3142 if (DumpSharedSpaces) { 3143 // Disable biased locking now as it interferes with the clean up of 3144 // the archived Klasses and Java string objects (at dump time only). 3145 UseBiasedLocking = false; 3146 3147 // Always verify non-system classes during CDS dump 3148 if (!BytecodeVerificationRemote) { 3149 BytecodeVerificationRemote = true; 3150 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time."); 3151 } 3152 } 3153 if (UseSharedSpaces && patch_mod_javabase) { 3154 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched."); 3155 } 3156 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) { 3157 FLAG_SET_DEFAULT(UseSharedSpaces, false); 3158 } 3159 #endif 3160 3161 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT 3162 UNSUPPORTED_OPTION(ShowRegistersOnAssert); 3163 #endif // CAN_SHOW_REGISTERS_ON_ASSERT 3164 3165 return JNI_OK; 3166 } 3167 3168 // Helper class for controlling the lifetime of JavaVMInitArgs 3169 // objects. The contents of the JavaVMInitArgs are guaranteed to be 3170 // deleted on the destruction of the ScopedVMInitArgs object. 3171 class ScopedVMInitArgs : public StackObj { 3172 private: 3173 JavaVMInitArgs _args; 3174 char* _container_name; 3175 bool _is_set; 3176 char* _vm_options_file_arg; 3177 3178 public: 3179 ScopedVMInitArgs(const char *container_name) { 3180 _args.version = JNI_VERSION_1_2; 3181 _args.nOptions = 0; 3182 _args.options = NULL; 3183 _args.ignoreUnrecognized = false; 3184 _container_name = (char *)container_name; 3185 _is_set = false; 3186 _vm_options_file_arg = NULL; 3187 } 3188 3189 // Populates the JavaVMInitArgs object represented by this 3190 // ScopedVMInitArgs object with the arguments in options. The 3191 // allocated memory is deleted by the destructor. If this method 3192 // returns anything other than JNI_OK, then this object is in a 3193 // partially constructed state, and should be abandoned. 3194 jint set_args(GrowableArray<JavaVMOption>* options) { 3195 _is_set = true; 3196 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL( 3197 JavaVMOption, options->length(), mtArguments); 3198 if (options_arr == NULL) { 3199 return JNI_ENOMEM; 3200 } 3201 _args.options = options_arr; 3202 3203 for (int i = 0; i < options->length(); i++) { 3204 options_arr[i] = options->at(i); 3205 options_arr[i].optionString = os::strdup(options_arr[i].optionString); 3206 if (options_arr[i].optionString == NULL) { 3207 // Rely on the destructor to do cleanup. 3208 _args.nOptions = i; 3209 return JNI_ENOMEM; 3210 } 3211 } 3212 3213 _args.nOptions = options->length(); 3214 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3215 return JNI_OK; 3216 } 3217 3218 JavaVMInitArgs* get() { return &_args; } 3219 char* container_name() { return _container_name; } 3220 bool is_set() { return _is_set; } 3221 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; } 3222 char* vm_options_file_arg() { return _vm_options_file_arg; } 3223 3224 void set_vm_options_file_arg(const char *vm_options_file_arg) { 3225 if (_vm_options_file_arg != NULL) { 3226 os::free(_vm_options_file_arg); 3227 } 3228 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg); 3229 } 3230 3231 ~ScopedVMInitArgs() { 3232 if (_vm_options_file_arg != NULL) { 3233 os::free(_vm_options_file_arg); 3234 } 3235 if (_args.options == NULL) return; 3236 for (int i = 0; i < _args.nOptions; i++) { 3237 os::free(_args.options[i].optionString); 3238 } 3239 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options); 3240 } 3241 3242 // Insert options into this option list, to replace option at 3243 // vm_options_file_pos (-XX:VMOptionsFile) 3244 jint insert(const JavaVMInitArgs* args, 3245 const JavaVMInitArgs* args_to_insert, 3246 const int vm_options_file_pos) { 3247 assert(_args.options == NULL, "shouldn't be set yet"); 3248 assert(args_to_insert->nOptions != 0, "there should be args to insert"); 3249 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set"); 3250 3251 int length = args->nOptions + args_to_insert->nOptions - 1; 3252 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) 3253 GrowableArray<JavaVMOption>(length, true); // Construct new option array 3254 for (int i = 0; i < args->nOptions; i++) { 3255 if (i == vm_options_file_pos) { 3256 // insert the new options starting at the same place as the 3257 // -XX:VMOptionsFile option 3258 for (int j = 0; j < args_to_insert->nOptions; j++) { 3259 options->push(args_to_insert->options[j]); 3260 } 3261 } else { 3262 options->push(args->options[i]); 3263 } 3264 } 3265 // make into options array 3266 jint result = set_args(options); 3267 delete options; 3268 return result; 3269 } 3270 }; 3271 3272 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) { 3273 return parse_options_environment_variable("_JAVA_OPTIONS", args); 3274 } 3275 3276 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) { 3277 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args); 3278 } 3279 3280 jint Arguments::parse_options_environment_variable(const char* name, 3281 ScopedVMInitArgs* vm_args) { 3282 char *buffer = ::getenv(name); 3283 3284 // Don't check this environment variable if user has special privileges 3285 // (e.g. unix su command). 3286 if (buffer == NULL || os::have_special_privileges()) { 3287 return JNI_OK; 3288 } 3289 3290 if ((buffer = os::strdup(buffer)) == NULL) { 3291 return JNI_ENOMEM; 3292 } 3293 3294 jio_fprintf(defaultStream::error_stream(), 3295 "Picked up %s: %s\n", name, buffer); 3296 3297 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args); 3298 3299 os::free(buffer); 3300 return retcode; 3301 } 3302 3303 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) { 3304 // read file into buffer 3305 int fd = ::open(file_name, O_RDONLY); 3306 if (fd < 0) { 3307 jio_fprintf(defaultStream::error_stream(), 3308 "Could not open options file '%s'\n", 3309 file_name); 3310 return JNI_ERR; 3311 } 3312 3313 struct stat stbuf; 3314 int retcode = os::stat(file_name, &stbuf); 3315 if (retcode != 0) { 3316 jio_fprintf(defaultStream::error_stream(), 3317 "Could not stat options file '%s'\n", 3318 file_name); 3319 os::close(fd); 3320 return JNI_ERR; 3321 } 3322 3323 if (stbuf.st_size == 0) { 3324 // tell caller there is no option data and that is ok 3325 os::close(fd); 3326 return JNI_OK; 3327 } 3328 3329 // '+ 1' for NULL termination even with max bytes 3330 size_t bytes_alloc = stbuf.st_size + 1; 3331 3332 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments); 3333 if (NULL == buf) { 3334 jio_fprintf(defaultStream::error_stream(), 3335 "Could not allocate read buffer for options file parse\n"); 3336 os::close(fd); 3337 return JNI_ENOMEM; 3338 } 3339 3340 memset(buf, 0, bytes_alloc); 3341 3342 // Fill buffer 3343 // Use ::read() instead of os::read because os::read() 3344 // might do a thread state transition 3345 // and it is too early for that here 3346 3347 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc); 3348 os::close(fd); 3349 if (bytes_read < 0) { 3350 FREE_C_HEAP_ARRAY(char, buf); 3351 jio_fprintf(defaultStream::error_stream(), 3352 "Could not read options file '%s'\n", file_name); 3353 return JNI_ERR; 3354 } 3355 3356 if (bytes_read == 0) { 3357 // tell caller there is no option data and that is ok 3358 FREE_C_HEAP_ARRAY(char, buf); 3359 return JNI_OK; 3360 } 3361 3362 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args); 3363 3364 FREE_C_HEAP_ARRAY(char, buf); 3365 return retcode; 3366 } 3367 3368 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) { 3369 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array 3370 3371 // some pointers to help with parsing 3372 char *buffer_end = buffer + buf_len; 3373 char *opt_hd = buffer; 3374 char *wrt = buffer; 3375 char *rd = buffer; 3376 3377 // parse all options 3378 while (rd < buffer_end) { 3379 // skip leading white space from the input string 3380 while (rd < buffer_end && isspace(*rd)) { 3381 rd++; 3382 } 3383 3384 if (rd >= buffer_end) { 3385 break; 3386 } 3387 3388 // Remember this is where we found the head of the token. 3389 opt_hd = wrt; 3390 3391 // Tokens are strings of non white space characters separated 3392 // by one or more white spaces. 3393 while (rd < buffer_end && !isspace(*rd)) { 3394 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3395 int quote = *rd; // matching quote to look for 3396 rd++; // don't copy open quote 3397 while (rd < buffer_end && *rd != quote) { 3398 // include everything (even spaces) 3399 // up until the close quote 3400 *wrt++ = *rd++; // copy to option string 3401 } 3402 3403 if (rd < buffer_end) { 3404 rd++; // don't copy close quote 3405 } else { 3406 // did not see closing quote 3407 jio_fprintf(defaultStream::error_stream(), 3408 "Unmatched quote in %s\n", name); 3409 delete options; 3410 return JNI_ERR; 3411 } 3412 } else { 3413 *wrt++ = *rd++; // copy to option string 3414 } 3415 } 3416 3417 // steal a white space character and set it to NULL 3418 *wrt++ = '\0'; 3419 // We now have a complete token 3420 3421 JavaVMOption option; 3422 option.optionString = opt_hd; 3423 option.extraInfo = NULL; 3424 3425 options->append(option); // Fill in option 3426 3427 rd++; // Advance to next character 3428 } 3429 3430 // Fill out JavaVMInitArgs structure. 3431 jint status = vm_args->set_args(options); 3432 3433 delete options; 3434 return status; 3435 } 3436 3437 void Arguments::set_shared_spaces_flags() { 3438 if (DumpSharedSpaces) { 3439 if (FailOverToOldVerifier) { 3440 // Don't fall back to the old verifier on verification failure. If a 3441 // class fails verification with the split verifier, it might fail the 3442 // CDS runtime verifier constraint check. In that case, we don't want 3443 // to share the class. We only archive classes that pass the split verifier. 3444 FLAG_SET_DEFAULT(FailOverToOldVerifier, false); 3445 } 3446 3447 if (RequireSharedSpaces) { 3448 warning("Cannot dump shared archive while using shared archive"); 3449 } 3450 UseSharedSpaces = false; 3451 #ifdef _LP64 3452 if (!UseCompressedOops || !UseCompressedClassPointers) { 3453 vm_exit_during_initialization( 3454 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3455 } 3456 } else { 3457 if (!UseCompressedOops || !UseCompressedClassPointers) { 3458 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3459 } 3460 #endif 3461 } 3462 } 3463 3464 // Sharing support 3465 // Construct the path to the archive 3466 static char* get_shared_archive_path() { 3467 char *shared_archive_path; 3468 if (SharedArchiveFile == NULL) { 3469 char jvm_path[JVM_MAXPATHLEN]; 3470 os::jvm_path(jvm_path, sizeof(jvm_path)); 3471 char *end = strrchr(jvm_path, *os::file_separator()); 3472 if (end != NULL) *end = '\0'; 3473 size_t jvm_path_len = strlen(jvm_path); 3474 size_t file_sep_len = strlen(os::file_separator()); 3475 const size_t len = jvm_path_len + file_sep_len + 20; 3476 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments); 3477 if (shared_archive_path != NULL) { 3478 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa", 3479 jvm_path, os::file_separator()); 3480 } 3481 } else { 3482 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments); 3483 } 3484 return shared_archive_path; 3485 } 3486 3487 #ifndef PRODUCT 3488 // Determine whether LogVMOutput should be implicitly turned on. 3489 static bool use_vm_log() { 3490 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3491 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3492 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3493 PrintAssembly || TraceDeoptimization || TraceDependencies || 3494 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3495 return true; 3496 } 3497 3498 #ifdef COMPILER1 3499 if (PrintC1Statistics) { 3500 return true; 3501 } 3502 #endif // COMPILER1 3503 3504 #ifdef COMPILER2 3505 if (PrintOptoAssembly || PrintOptoStatistics) { 3506 return true; 3507 } 3508 #endif // COMPILER2 3509 3510 return false; 3511 } 3512 3513 #endif // PRODUCT 3514 3515 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) { 3516 for (int index = 0; index < args->nOptions; index++) { 3517 const JavaVMOption* option = args->options + index; 3518 const char* tail; 3519 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3520 return true; 3521 } 3522 } 3523 return false; 3524 } 3525 3526 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args, 3527 const char* vm_options_file, 3528 const int vm_options_file_pos, 3529 ScopedVMInitArgs* vm_options_file_args, 3530 ScopedVMInitArgs* args_out) { 3531 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args); 3532 if (code != JNI_OK) { 3533 return code; 3534 } 3535 3536 if (vm_options_file_args->get()->nOptions < 1) { 3537 return JNI_OK; 3538 } 3539 3540 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) { 3541 jio_fprintf(defaultStream::error_stream(), 3542 "A VM options file may not refer to a VM options file. " 3543 "Specification of '-XX:VMOptionsFile=<file-name>' in the " 3544 "options file '%s' in options container '%s' is an error.\n", 3545 vm_options_file_args->vm_options_file_arg(), 3546 vm_options_file_args->container_name()); 3547 return JNI_EINVAL; 3548 } 3549 3550 return args_out->insert(args, vm_options_file_args->get(), 3551 vm_options_file_pos); 3552 } 3553 3554 // Expand -XX:VMOptionsFile found in args_in as needed. 3555 // mod_args and args_out parameters may return values as needed. 3556 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 3557 ScopedVMInitArgs* mod_args, 3558 JavaVMInitArgs** args_out) { 3559 jint code = match_special_option_and_act(args_in, mod_args); 3560 if (code != JNI_OK) { 3561 return code; 3562 } 3563 3564 if (mod_args->is_set()) { 3565 // args_in contains -XX:VMOptionsFile and mod_args contains the 3566 // original options from args_in along with the options expanded 3567 // from the VMOptionsFile. Return a short-hand to the caller. 3568 *args_out = mod_args->get(); 3569 } else { 3570 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in 3571 } 3572 return JNI_OK; 3573 } 3574 3575 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args, 3576 ScopedVMInitArgs* args_out) { 3577 // Remaining part of option string 3578 const char* tail; 3579 ScopedVMInitArgs vm_options_file_args(args_out->container_name()); 3580 3581 for (int index = 0; index < args->nOptions; index++) { 3582 const JavaVMOption* option = args->options + index; 3583 if (ArgumentsExt::process_options(option)) { 3584 continue; 3585 } 3586 if (match_option(option, "-XX:Flags=", &tail)) { 3587 Arguments::set_jvm_flags_file(tail); 3588 continue; 3589 } 3590 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3591 if (vm_options_file_args.found_vm_options_file_arg()) { 3592 jio_fprintf(defaultStream::error_stream(), 3593 "The option '%s' is already specified in the options " 3594 "container '%s' so the specification of '%s' in the " 3595 "same options container is an error.\n", 3596 vm_options_file_args.vm_options_file_arg(), 3597 vm_options_file_args.container_name(), 3598 option->optionString); 3599 return JNI_EINVAL; 3600 } 3601 vm_options_file_args.set_vm_options_file_arg(option->optionString); 3602 // If there's a VMOptionsFile, parse that 3603 jint code = insert_vm_options_file(args, tail, index, 3604 &vm_options_file_args, args_out); 3605 if (code != JNI_OK) { 3606 return code; 3607 } 3608 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg()); 3609 if (args_out->is_set()) { 3610 // The VMOptions file inserted some options so switch 'args' 3611 // to the new set of options, and continue processing which 3612 // preserves "last option wins" semantics. 3613 args = args_out->get(); 3614 // The first option from the VMOptionsFile replaces the 3615 // current option. So we back track to process the 3616 // replacement option. 3617 index--; 3618 } 3619 continue; 3620 } 3621 if (match_option(option, "-XX:+PrintVMOptions")) { 3622 PrintVMOptions = true; 3623 continue; 3624 } 3625 if (match_option(option, "-XX:-PrintVMOptions")) { 3626 PrintVMOptions = false; 3627 continue; 3628 } 3629 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) { 3630 IgnoreUnrecognizedVMOptions = true; 3631 continue; 3632 } 3633 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) { 3634 IgnoreUnrecognizedVMOptions = false; 3635 continue; 3636 } 3637 if (match_option(option, "-XX:+PrintFlagsInitial")) { 3638 JVMFlag::printFlags(tty, false); 3639 vm_exit(0); 3640 } 3641 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3642 #if INCLUDE_NMT 3643 // The launcher did not setup nmt environment variable properly. 3644 if (!MemTracker::check_launcher_nmt_support(tail)) { 3645 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 3646 } 3647 3648 // Verify if nmt option is valid. 3649 if (MemTracker::verify_nmt_option()) { 3650 // Late initialization, still in single-threaded mode. 3651 if (MemTracker::tracking_level() >= NMT_summary) { 3652 MemTracker::init(); 3653 } 3654 } else { 3655 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 3656 } 3657 continue; 3658 #else 3659 jio_fprintf(defaultStream::error_stream(), 3660 "Native Memory Tracking is not supported in this VM\n"); 3661 return JNI_ERR; 3662 #endif 3663 } 3664 3665 #ifndef PRODUCT 3666 if (match_option(option, "-XX:+PrintFlagsWithComments")) { 3667 JVMFlag::printFlags(tty, true); 3668 vm_exit(0); 3669 } 3670 #endif 3671 } 3672 return JNI_OK; 3673 } 3674 3675 static void print_options(const JavaVMInitArgs *args) { 3676 const char* tail; 3677 for (int index = 0; index < args->nOptions; index++) { 3678 const JavaVMOption *option = args->options + index; 3679 if (match_option(option, "-XX:", &tail)) { 3680 logOption(tail); 3681 } 3682 } 3683 } 3684 3685 bool Arguments::handle_deprecated_print_gc_flags() { 3686 if (PrintGC) { 3687 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead."); 3688 } 3689 if (PrintGCDetails) { 3690 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead."); 3691 } 3692 3693 if (_gc_log_filename != NULL) { 3694 // -Xloggc was used to specify a filename 3695 const char* gc_conf = PrintGCDetails ? "gc*" : "gc"; 3696 3697 LogTarget(Error, logging) target; 3698 LogStream errstream(target); 3699 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream); 3700 } else if (PrintGC || PrintGCDetails) { 3701 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc)); 3702 } 3703 return true; 3704 } 3705 3706 void Arguments::handle_extra_cms_flags(const char* msg) { 3707 SpecialFlag flag; 3708 const char *flag_name = "UseConcMarkSweepGC"; 3709 if (lookup_special_flag(flag_name, flag)) { 3710 handle_aliases_and_deprecation(flag_name, /* print warning */ true); 3711 warning("%s", msg); 3712 } 3713 } 3714 3715 // Parse entry point called from JNI_CreateJavaVM 3716 3717 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) { 3718 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent"); 3719 3720 // Initialize ranges, constraints and writeables 3721 JVMFlagRangeList::init(); 3722 JVMFlagConstraintList::init(); 3723 JVMFlagWriteableList::init(); 3724 3725 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 3726 const char* hotspotrc = ".hotspotrc"; 3727 bool settings_file_specified = false; 3728 bool needs_hotspotrc_warning = false; 3729 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3730 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'"); 3731 3732 // Pointers to current working set of containers 3733 JavaVMInitArgs* cur_cmd_args; 3734 JavaVMInitArgs* cur_java_options_args; 3735 JavaVMInitArgs* cur_java_tool_options_args; 3736 3737 // Containers for modified/expanded options 3738 ScopedVMInitArgs mod_cmd_args("cmd_line_args"); 3739 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3740 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'"); 3741 3742 3743 jint code = 3744 parse_java_tool_options_environment_variable(&initial_java_tool_options_args); 3745 if (code != JNI_OK) { 3746 return code; 3747 } 3748 3749 code = parse_java_options_environment_variable(&initial_java_options_args); 3750 if (code != JNI_OK) { 3751 return code; 3752 } 3753 3754 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(), 3755 &mod_java_tool_options_args, 3756 &cur_java_tool_options_args); 3757 if (code != JNI_OK) { 3758 return code; 3759 } 3760 3761 code = expand_vm_options_as_needed(initial_cmd_args, 3762 &mod_cmd_args, 3763 &cur_cmd_args); 3764 if (code != JNI_OK) { 3765 return code; 3766 } 3767 3768 code = expand_vm_options_as_needed(initial_java_options_args.get(), 3769 &mod_java_options_args, 3770 &cur_java_options_args); 3771 if (code != JNI_OK) { 3772 return code; 3773 } 3774 3775 const char* flags_file = Arguments::get_jvm_flags_file(); 3776 settings_file_specified = (flags_file != NULL); 3777 3778 if (IgnoreUnrecognizedVMOptions) { 3779 cur_cmd_args->ignoreUnrecognized = true; 3780 cur_java_tool_options_args->ignoreUnrecognized = true; 3781 cur_java_options_args->ignoreUnrecognized = true; 3782 } 3783 3784 // Parse specified settings file 3785 if (settings_file_specified) { 3786 if (!process_settings_file(flags_file, true, 3787 cur_cmd_args->ignoreUnrecognized)) { 3788 return JNI_EINVAL; 3789 } 3790 } else { 3791 #ifdef ASSERT 3792 // Parse default .hotspotrc settings file 3793 if (!process_settings_file(".hotspotrc", false, 3794 cur_cmd_args->ignoreUnrecognized)) { 3795 return JNI_EINVAL; 3796 } 3797 #else 3798 struct stat buf; 3799 if (os::stat(hotspotrc, &buf) == 0) { 3800 needs_hotspotrc_warning = true; 3801 } 3802 #endif 3803 } 3804 3805 if (PrintVMOptions) { 3806 print_options(cur_java_tool_options_args); 3807 print_options(cur_cmd_args); 3808 print_options(cur_java_options_args); 3809 } 3810 3811 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 3812 jint result = parse_vm_init_args(cur_java_tool_options_args, 3813 cur_java_options_args, 3814 cur_cmd_args); 3815 3816 if (result != JNI_OK) { 3817 return result; 3818 } 3819 3820 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 3821 SharedArchivePath = get_shared_archive_path(); 3822 if (SharedArchivePath == NULL) { 3823 return JNI_ENOMEM; 3824 } 3825 3826 // Set up VerifySharedSpaces 3827 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 3828 VerifySharedSpaces = true; 3829 } 3830 3831 // Delay warning until here so that we've had a chance to process 3832 // the -XX:-PrintWarnings flag 3833 if (needs_hotspotrc_warning) { 3834 warning("%s file is present but has been ignored. " 3835 "Run with -XX:Flags=%s to load the file.", 3836 hotspotrc, hotspotrc); 3837 } 3838 3839 if (needs_module_property_warning) { 3840 warning("Ignoring system property options whose names match the '-Djdk.module.*'." 3841 " names that are reserved for internal use."); 3842 } 3843 3844 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 3845 UNSUPPORTED_OPTION(UseLargePages); 3846 #endif 3847 3848 #if defined(AIX) 3849 UNSUPPORTED_OPTION(AllocateHeapAt); 3850 #endif 3851 3852 ArgumentsExt::report_unsupported_options(); 3853 3854 #ifndef PRODUCT 3855 if (TraceBytecodesAt != 0) { 3856 TraceBytecodes = true; 3857 } 3858 if (CountCompiledCalls) { 3859 if (UseCounterDecay) { 3860 warning("UseCounterDecay disabled because CountCalls is set"); 3861 UseCounterDecay = false; 3862 } 3863 } 3864 #endif // PRODUCT 3865 3866 if (ScavengeRootsInCode == 0) { 3867 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 3868 warning("Forcing ScavengeRootsInCode non-zero"); 3869 } 3870 ScavengeRootsInCode = 1; 3871 } 3872 3873 if (!handle_deprecated_print_gc_flags()) { 3874 return JNI_EINVAL; 3875 } 3876 3877 // Set object alignment values. 3878 set_object_alignment(); 3879 3880 #if !INCLUDE_CDS 3881 if (DumpSharedSpaces || RequireSharedSpaces) { 3882 jio_fprintf(defaultStream::error_stream(), 3883 "Shared spaces are not supported in this VM\n"); 3884 return JNI_ERR; 3885 } 3886 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || 3887 log_is_enabled(Info, cds)) { 3888 warning("Shared spaces are not supported in this VM"); 3889 FLAG_SET_DEFAULT(UseSharedSpaces, false); 3890 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds)); 3891 } 3892 no_shared_spaces("CDS Disabled"); 3893 #endif // INCLUDE_CDS 3894 3895 return JNI_OK; 3896 } 3897 3898 jint Arguments::apply_ergo() { 3899 // Set flags based on ergonomics. 3900 jint result = set_ergonomics_flags(); 3901 if (result != JNI_OK) return result; 3902 3903 // Set heap size based on available physical memory 3904 set_heap_size(); 3905 3906 GCConfig::arguments()->initialize(); 3907 3908 set_shared_spaces_flags(); 3909 3910 // Initialize Metaspace flags and alignments 3911 Metaspace::ergo_initialize(); 3912 3913 // Set compiler flags after GC is selected and GC specific 3914 // flags (LoopStripMiningIter) are set. 3915 CompilerConfig::ergo_initialize(); 3916 3917 // Set bytecode rewriting flags 3918 set_bytecode_flags(); 3919 3920 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 3921 jint code = set_aggressive_opts_flags(); 3922 if (code != JNI_OK) { 3923 return code; 3924 } 3925 3926 // Turn off biased locking for locking debug mode flags, 3927 // which are subtly different from each other but neither works with 3928 // biased locking 3929 if (UseHeavyMonitors 3930 #ifdef COMPILER1 3931 || !UseFastLocking 3932 #endif // COMPILER1 3933 #if INCLUDE_JVMCI 3934 || !JVMCIUseFastLocking 3935 #endif 3936 ) { 3937 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 3938 // flag set to true on command line; warn the user that they 3939 // can't enable biased locking here 3940 warning("Biased Locking is not supported with locking debug flags" 3941 "; ignoring UseBiasedLocking flag." ); 3942 } 3943 UseBiasedLocking = false; 3944 } 3945 3946 #ifdef CC_INTERP 3947 // Clear flags not supported on zero. 3948 FLAG_SET_DEFAULT(ProfileInterpreter, false); 3949 FLAG_SET_DEFAULT(UseBiasedLocking, false); 3950 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 3951 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 3952 #endif // CC_INTERP 3953 3954 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 3955 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 3956 DebugNonSafepoints = true; 3957 } 3958 3959 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 3960 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 3961 } 3962 3963 #ifndef PRODUCT 3964 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 3965 if (use_vm_log()) { 3966 LogVMOutput = true; 3967 } 3968 } 3969 #endif // PRODUCT 3970 3971 if (PrintCommandLineFlags) { 3972 JVMFlag::printSetFlags(tty); 3973 } 3974 3975 // Apply CPU specific policy for the BiasedLocking 3976 if (UseBiasedLocking) { 3977 if (!VM_Version::use_biased_locking() && 3978 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 3979 UseBiasedLocking = false; 3980 } 3981 } 3982 #ifdef COMPILER2 3983 if (!UseBiasedLocking) { 3984 UseOptoBiasInlining = false; 3985 } 3986 #endif 3987 3988 #if defined(IA32) 3989 // Only server compiler can optimize safepoints well enough. 3990 if (!is_server_compilation_mode_vm()) { 3991 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false); 3992 } 3993 #endif 3994 3995 // ThreadLocalHandshakesConstraintFunc handles the constraints. 3996 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) { 3997 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled."); 3998 } else { 3999 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled."); 4000 } 4001 4002 return JNI_OK; 4003 } 4004 4005 jint Arguments::adjust_after_os() { 4006 if (UseNUMA) { 4007 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) { 4008 FLAG_SET_ERGO(bool, UseNUMA, false); 4009 } else if (UseParallelGC || UseParallelOldGC) { 4010 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4011 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4012 } 4013 } 4014 // UseNUMAInterleaving is set to ON for all collectors and 4015 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4016 // such as the parallel collector for Linux and Solaris will 4017 // interleave old gen and survivor spaces on top of NUMA 4018 // allocation policy for the eden space. 4019 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4020 // all platforms and ParallelGC on Windows will interleave all 4021 // of the heap spaces across NUMA nodes. 4022 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4023 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4024 } 4025 } 4026 return JNI_OK; 4027 } 4028 4029 int Arguments::PropertyList_count(SystemProperty* pl) { 4030 int count = 0; 4031 while(pl != NULL) { 4032 count++; 4033 pl = pl->next(); 4034 } 4035 return count; 4036 } 4037 4038 // Return the number of readable properties. 4039 int Arguments::PropertyList_readable_count(SystemProperty* pl) { 4040 int count = 0; 4041 while(pl != NULL) { 4042 if (pl->is_readable()) { 4043 count++; 4044 } 4045 pl = pl->next(); 4046 } 4047 return count; 4048 } 4049 4050 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4051 assert(key != NULL, "just checking"); 4052 SystemProperty* prop; 4053 for (prop = pl; prop != NULL; prop = prop->next()) { 4054 if (strcmp(key, prop->key()) == 0) return prop->value(); 4055 } 4056 return NULL; 4057 } 4058 4059 // Return the value of the requested property provided that it is a readable property. 4060 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) { 4061 assert(key != NULL, "just checking"); 4062 SystemProperty* prop; 4063 // Return the property value if the keys match and the property is not internal or 4064 // it's the special internal property "jdk.boot.class.path.append". 4065 for (prop = pl; prop != NULL; prop = prop->next()) { 4066 if (strcmp(key, prop->key()) == 0) { 4067 if (!prop->internal()) { 4068 return prop->value(); 4069 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) { 4070 return prop->value(); 4071 } else { 4072 // Property is internal and not jdk.boot.class.path.append so return NULL. 4073 return NULL; 4074 } 4075 } 4076 } 4077 return NULL; 4078 } 4079 4080 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4081 int count = 0; 4082 const char* ret_val = NULL; 4083 4084 while(pl != NULL) { 4085 if(count >= index) { 4086 ret_val = pl->key(); 4087 break; 4088 } 4089 count++; 4090 pl = pl->next(); 4091 } 4092 4093 return ret_val; 4094 } 4095 4096 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4097 int count = 0; 4098 char* ret_val = NULL; 4099 4100 while(pl != NULL) { 4101 if(count >= index) { 4102 ret_val = pl->value(); 4103 break; 4104 } 4105 count++; 4106 pl = pl->next(); 4107 } 4108 4109 return ret_val; 4110 } 4111 4112 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4113 SystemProperty* p = *plist; 4114 if (p == NULL) { 4115 *plist = new_p; 4116 } else { 4117 while (p->next() != NULL) { 4118 p = p->next(); 4119 } 4120 p->set_next(new_p); 4121 } 4122 } 4123 4124 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v, 4125 bool writeable, bool internal) { 4126 if (plist == NULL) 4127 return; 4128 4129 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal); 4130 PropertyList_add(plist, new_p); 4131 } 4132 4133 void Arguments::PropertyList_add(SystemProperty *element) { 4134 PropertyList_add(&_system_properties, element); 4135 } 4136 4137 // This add maintains unique property key in the list. 4138 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, 4139 PropertyAppendable append, PropertyWriteable writeable, 4140 PropertyInternal internal) { 4141 if (plist == NULL) 4142 return; 4143 4144 // If property key exist then update with new value. 4145 SystemProperty* prop; 4146 for (prop = *plist; prop != NULL; prop = prop->next()) { 4147 if (strcmp(k, prop->key()) == 0) { 4148 if (append == AppendProperty) { 4149 prop->append_value(v); 4150 } else { 4151 prop->set_value(v); 4152 } 4153 return; 4154 } 4155 } 4156 4157 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty); 4158 } 4159 4160 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4161 // Returns true if all of the source pointed by src has been copied over to 4162 // the destination buffer pointed by buf. Otherwise, returns false. 4163 // Notes: 4164 // 1. If the length (buflen) of the destination buffer excluding the 4165 // NULL terminator character is not long enough for holding the expanded 4166 // pid characters, it also returns false instead of returning the partially 4167 // expanded one. 4168 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4169 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4170 char* buf, size_t buflen) { 4171 const char* p = src; 4172 char* b = buf; 4173 const char* src_end = &src[srclen]; 4174 char* buf_end = &buf[buflen - 1]; 4175 4176 while (p < src_end && b < buf_end) { 4177 if (*p == '%') { 4178 switch (*(++p)) { 4179 case '%': // "%%" ==> "%" 4180 *b++ = *p++; 4181 break; 4182 case 'p': { // "%p" ==> current process id 4183 // buf_end points to the character before the last character so 4184 // that we could write '\0' to the end of the buffer. 4185 size_t buf_sz = buf_end - b + 1; 4186 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4187 4188 // if jio_snprintf fails or the buffer is not long enough to hold 4189 // the expanded pid, returns false. 4190 if (ret < 0 || ret >= (int)buf_sz) { 4191 return false; 4192 } else { 4193 b += ret; 4194 assert(*b == '\0', "fail in copy_expand_pid"); 4195 if (p == src_end && b == buf_end + 1) { 4196 // reach the end of the buffer. 4197 return true; 4198 } 4199 } 4200 p++; 4201 break; 4202 } 4203 default : 4204 *b++ = '%'; 4205 } 4206 } else { 4207 *b++ = *p++; 4208 } 4209 } 4210 *b = '\0'; 4211 return (p == src_end); // return false if not all of the source was copied 4212 }