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