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/commandLineFlagConstraintList.hpp" 46 #include "runtime/commandLineFlagWriteableList.hpp" 47 #include "runtime/commandLineFlagRangeList.hpp" 48 #include "runtime/globals.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 char* Arguments::SharedArchivePath = NULL; 100 101 AgentLibraryList Arguments::_libraryList; 102 AgentLibraryList Arguments::_agentList; 103 104 abort_hook_t Arguments::_abort_hook = NULL; 105 exit_hook_t Arguments::_exit_hook = NULL; 106 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 107 108 109 SystemProperty *Arguments::_sun_boot_library_path = NULL; 110 SystemProperty *Arguments::_java_library_path = NULL; 111 SystemProperty *Arguments::_java_home = NULL; 112 SystemProperty *Arguments::_java_class_path = NULL; 113 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL; 114 115 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL; 116 PathString *Arguments::_system_boot_class_path = NULL; 117 bool Arguments::_has_jimage = false; 118 119 char* Arguments::_ext_dirs = NULL; 120 121 bool PathString::set_value(const char *value) { 122 if (_value != NULL) { 123 FreeHeap(_value); 124 } 125 _value = AllocateHeap(strlen(value)+1, mtArguments); 126 assert(_value != NULL, "Unable to allocate space for new path value"); 127 if (_value != NULL) { 128 strcpy(_value, value); 129 } else { 130 // not able to allocate 131 return false; 132 } 133 return true; 134 } 135 136 void PathString::append_value(const char *value) { 137 char *sp; 138 size_t len = 0; 139 if (value != NULL) { 140 len = strlen(value); 141 if (_value != NULL) { 142 len += strlen(_value); 143 } 144 sp = AllocateHeap(len+2, mtArguments); 145 assert(sp != NULL, "Unable to allocate space for new append path value"); 146 if (sp != NULL) { 147 if (_value != NULL) { 148 strcpy(sp, _value); 149 strcat(sp, os::path_separator()); 150 strcat(sp, value); 151 FreeHeap(_value); 152 } else { 153 strcpy(sp, value); 154 } 155 _value = sp; 156 } 157 } 158 } 159 160 PathString::PathString(const char* value) { 161 if (value == NULL) { 162 _value = NULL; 163 } else { 164 _value = AllocateHeap(strlen(value)+1, mtArguments); 165 strcpy(_value, value); 166 } 167 } 168 169 PathString::~PathString() { 170 if (_value != NULL) { 171 FreeHeap(_value); 172 _value = NULL; 173 } 174 } 175 176 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) { 177 assert(module_name != NULL && path != NULL, "Invalid module name or path value"); 178 size_t len = strlen(module_name) + 1; 179 _module_name = AllocateHeap(len, mtInternal); 180 strncpy(_module_name, module_name, len); // copy the trailing null 181 _path = new PathString(path); 182 } 183 184 ModulePatchPath::~ModulePatchPath() { 185 if (_module_name != NULL) { 186 FreeHeap(_module_name); 187 _module_name = NULL; 188 } 189 if (_path != NULL) { 190 delete _path; 191 _path = NULL; 192 } 193 } 194 195 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) { 196 if (key == NULL) { 197 _key = NULL; 198 } else { 199 _key = AllocateHeap(strlen(key)+1, mtArguments); 200 strcpy(_key, key); 201 } 202 _next = NULL; 203 _internal = internal; 204 _writeable = writeable; 205 } 206 207 AgentLibrary::AgentLibrary(const char* name, const char* options, 208 bool is_absolute_path, void* os_lib, 209 bool instrument_lib) { 210 _name = AllocateHeap(strlen(name)+1, mtArguments); 211 strcpy(_name, name); 212 if (options == NULL) { 213 _options = NULL; 214 } else { 215 _options = AllocateHeap(strlen(options)+1, mtArguments); 216 strcpy(_options, options); 217 } 218 _is_absolute_path = is_absolute_path; 219 _os_lib = os_lib; 220 _next = NULL; 221 _state = agent_invalid; 222 _is_static_lib = false; 223 _is_instrument_lib = instrument_lib; 224 } 225 226 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining 227 // part of the option string. 228 static bool match_option(const JavaVMOption *option, const char* name, 229 const char** tail) { 230 size_t len = strlen(name); 231 if (strncmp(option->optionString, name, len) == 0) { 232 *tail = option->optionString + len; 233 return true; 234 } else { 235 return false; 236 } 237 } 238 239 // Check if 'option' matches 'name'. No "tail" is allowed. 240 static bool match_option(const JavaVMOption *option, const char* name) { 241 const char* tail = NULL; 242 bool result = match_option(option, name, &tail); 243 if (tail != NULL && *tail == '\0') { 244 return result; 245 } else { 246 return false; 247 } 248 } 249 250 // Return true if any of the strings in null-terminated array 'names' matches. 251 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 252 // the option must match exactly. 253 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 254 bool tail_allowed) { 255 for (/* empty */; *names != NULL; ++names) { 256 if (match_option(option, *names, tail)) { 257 if (**tail == '\0' || (tail_allowed && **tail == ':')) { 258 return true; 259 } 260 } 261 } 262 return false; 263 } 264 265 static void logOption(const char* opt) { 266 if (PrintVMOptions) { 267 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 268 } 269 } 270 271 bool needs_module_property_warning = false; 272 273 #define MODULE_PROPERTY_PREFIX "jdk.module." 274 #define MODULE_PROPERTY_PREFIX_LEN 11 275 #define ADDEXPORTS "addexports" 276 #define ADDEXPORTS_LEN 10 277 #define ADDREADS "addreads" 278 #define ADDREADS_LEN 8 279 #define ADDOPENS "addopens" 280 #define ADDOPENS_LEN 8 281 #define PATCH "patch" 282 #define PATCH_LEN 5 283 #define ADDMODS "addmods" 284 #define ADDMODS_LEN 7 285 #define LIMITMODS "limitmods" 286 #define LIMITMODS_LEN 9 287 #define PATH "path" 288 #define PATH_LEN 4 289 #define UPGRADE_PATH "upgrade.path" 290 #define UPGRADE_PATH_LEN 12 291 292 void Arguments::add_init_library(const char* name, char* options) { 293 _libraryList.add(new AgentLibrary(name, options, false, NULL)); 294 } 295 296 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) { 297 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); 298 } 299 300 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) { 301 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true)); 302 } 303 304 // Late-binding agents not started via arguments 305 void Arguments::add_loaded_agent(AgentLibrary *agentLib) { 306 _agentList.add(agentLib); 307 } 308 309 void Arguments::add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) { 310 _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); 311 } 312 313 // Return TRUE if option matches 'property', or 'property=', or 'property.'. 314 static bool matches_property_suffix(const char* option, const char* property, size_t len) { 315 return ((strncmp(option, property, len) == 0) && 316 (option[len] == '=' || option[len] == '.' || option[len] == '\0')); 317 } 318 319 // Return true if property starts with "jdk.module." and its ensuing chars match 320 // any of the reserved module properties. 321 // property should be passed without the leading "-D". 322 bool Arguments::is_internal_module_property(const char* property) { 323 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D"); 324 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) { 325 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN; 326 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) || 327 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) || 328 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) || 329 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) || 330 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) || 331 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) || 332 matches_property_suffix(property_suffix, PATH, PATH_LEN) || 333 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) { 334 return true; 335 } 336 } 337 return false; 338 } 339 340 // Process java launcher properties. 341 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 342 // See if sun.java.launcher, sun.java.launcher.is_altjvm or 343 // sun.java.launcher.pid is defined. 344 // Must do this before setting up other system properties, 345 // as some of them may depend on launcher type. 346 for (int index = 0; index < args->nOptions; index++) { 347 const JavaVMOption* option = args->options + index; 348 const char* tail; 349 350 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 351 process_java_launcher_argument(tail, option->extraInfo); 352 continue; 353 } 354 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { 355 if (strcmp(tail, "true") == 0) { 356 _sun_java_launcher_is_altjvm = true; 357 } 358 continue; 359 } 360 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 361 _sun_java_launcher_pid = atoi(tail); 362 continue; 363 } 364 } 365 } 366 367 // Initialize system properties key and value. 368 void Arguments::init_system_properties() { 369 370 // Set up _system_boot_class_path which is not a property but 371 // relies heavily on argument processing and the jdk.boot.class.path.append 372 // property. It is used to store the underlying system boot class path. 373 _system_boot_class_path = new PathString(NULL); 374 375 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 376 "Java Virtual Machine Specification", false)); 377 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 378 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 379 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 380 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false)); 381 382 // Following are JVMTI agent writable properties. 383 // Properties values are set to NULL and they are 384 // os specific they are initialized in os::init_system_properties_values(). 385 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 386 _java_library_path = new SystemProperty("java.library.path", NULL, true); 387 _java_home = new SystemProperty("java.home", NULL, true); 388 _java_class_path = new SystemProperty("java.class.path", "", true); 389 // jdk.boot.class.path.append is a non-writeable, internal property. 390 // It can only be set by either: 391 // - -Xbootclasspath/a: 392 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase 393 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true); 394 395 // Add to System Property list. 396 PropertyList_add(&_system_properties, _sun_boot_library_path); 397 PropertyList_add(&_system_properties, _java_library_path); 398 PropertyList_add(&_system_properties, _java_home); 399 PropertyList_add(&_system_properties, _java_class_path); 400 PropertyList_add(&_system_properties, _jdk_boot_class_path_append); 401 402 // Set OS specific system properties values 403 os::init_system_properties_values(); 404 } 405 406 // Update/Initialize System properties after JDK version number is known 407 void Arguments::init_version_specific_system_properties() { 408 enum { bufsz = 16 }; 409 char buffer[bufsz]; 410 const char* spec_vendor = "Oracle Corporation"; 411 uint32_t spec_version = JDK_Version::current().major_version(); 412 413 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version); 414 415 PropertyList_add(&_system_properties, 416 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); 417 PropertyList_add(&_system_properties, 418 new SystemProperty("java.vm.specification.version", buffer, false)); 419 PropertyList_add(&_system_properties, 420 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 421 } 422 423 /* 424 * -XX argument processing: 425 * 426 * -XX arguments are defined in several places, such as: 427 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp. 428 * -XX arguments are parsed in parse_argument(). 429 * -XX argument bounds checking is done in check_vm_args_consistency(). 430 * 431 * Over time -XX arguments may change. There are mechanisms to handle common cases: 432 * 433 * ALIASED: An option that is simply another name for another option. This is often 434 * part of the process of deprecating a flag, but not all aliases need 435 * to be deprecated. 436 * 437 * Create an alias for an option by adding the old and new option names to the 438 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc). 439 * 440 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that 441 * support may be removed in the future. Both regular and aliased options may be 442 * deprecated. 443 * 444 * Add a deprecation warning for an option (or alias) by adding an entry in the 445 * "special_jvm_flags" table and setting the "deprecated_in" field. 446 * Often an option "deprecated" in one major release will 447 * be made "obsolete" in the next. In this case the entry should also have its 448 * "obsolete_in" field set. 449 * 450 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted 451 * on the command line. A warning is printed to let the user know that option might not 452 * be accepted in the future. 453 * 454 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags" 455 * table and setting the "obsolete_in" field. 456 * 457 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal 458 * to the current JDK version. The system will flatly refuse to admit the existence of 459 * the flag. This allows a flag to die automatically over JDK releases. 460 * 461 * Note that manual cleanup of expired options should be done at major JDK version upgrades: 462 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables. 463 * - Newly obsolete or expired deprecated options should have their global variable 464 * definitions removed (from globals.hpp, etc) and related implementations removed. 465 * 466 * Recommended approach for removing options: 467 * 468 * To remove options commonly used by customers (e.g. product, commercial -XX options), use 469 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns. 470 * 471 * To remove internal options (e.g. diagnostic, experimental, develop options), use 472 * a 2-step model adding major release numbers to the obsolete and expire columns. 473 * 474 * To change the name of an option, use the alias table as well as a 2-step 475 * model adding major release numbers to the deprecate and expire columns. 476 * Think twice about aliasing commonly used customer options. 477 * 478 * There are times when it is appropriate to leave a future release number as undefined. 479 * 480 * Tests: Aliases should be tested in VMAliasOptions.java. 481 * Deprecated options should be tested in VMDeprecatedOptions.java. 482 */ 483 484 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The 485 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both. 486 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on 487 // the command-line as usual, but will issue a warning. 488 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on 489 // the command-line, while issuing a warning and ignoring the flag value. 490 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the 491 // existence of the flag. 492 // 493 // MANUAL CLEANUP ON JDK VERSION UPDATES: 494 // This table ensures that the handling of options will update automatically when the JDK 495 // version is incremented, but the source code needs to be cleanup up manually: 496 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals" 497 // variable should be removed, as well as users of the variable. 498 // - As "deprecated" options age into "obsolete" options, move the entry into the 499 // "Obsolete Flags" section of the table. 500 // - All expired options should be removed from the table. 501 static SpecialFlag const special_jvm_flags[] = { 502 // -------------- Deprecated Flags -------------- 503 // --- Non-alias flags - sorted by obsolete_in then expired_in: 504 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 505 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 506 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() }, 507 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() }, 508 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 509 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 510 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 511 { "UseMembar", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 512 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 513 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 514 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 515 { "PrintSafepointStatistics", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 516 { "PrintSafepointStatisticsTimeout", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 517 { "PrintSafepointStatisticsCount",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 518 { "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) }, 519 520 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in: 521 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 522 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 523 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 524 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 525 526 // -------------- Obsolete Flags - sorted by expired_in -------------- 527 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 528 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 529 { "MinSleepInterval", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 530 { "CheckAssertionStatusDirectives",JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 531 { "PrintMallocFree", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 532 { "PrintMalloc", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 533 { "ShowSafepointMsgs", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 534 { "FastTLABRefill", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 535 { "SafepointSpinBeforeYield", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 536 { "CheckEndorsedAndExtDirs", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 537 { "DeferThrSuspendLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 538 { "DeferPollingPageLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 539 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 540 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 541 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 542 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 543 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 544 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() }, 545 { "UseUTCFileTimestamp", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) }, 546 547 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS 548 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() }, 549 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) }, 550 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) }, 551 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) }, 552 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 553 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 554 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() }, 555 #endif 556 557 { NULL, JDK_Version(0), JDK_Version(0) } 558 }; 559 560 // Flags that are aliases for other flags. 561 typedef struct { 562 const char* alias_name; 563 const char* real_name; 564 } AliasedFlag; 565 566 static AliasedFlag const aliased_jvm_flags[] = { 567 { "DefaultMaxRAMFraction", "MaxRAMFraction" }, 568 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" }, 569 { NULL, NULL} 570 }; 571 572 // NOTE: A compatibility request will be necessary for each alias to be removed. 573 static AliasedLoggingFlag const aliased_logging_flags[] = { 574 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) }, 575 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) }, 576 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) }, 577 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) }, 578 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) }, 579 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) }, 580 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) }, 581 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) }, 582 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) }, 583 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) }, 584 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) }, 585 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) }, 586 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) }, 587 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) }, 588 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) } 589 }; 590 591 #ifndef PRODUCT 592 // These options are removed in jdk9. Remove this code for jdk10. 593 static AliasedFlag const removed_develop_logging_flags[] = { 594 { "TraceClassInitialization", "-Xlog:class+init" }, 595 { "TraceClassLoaderData", "-Xlog:class+loader+data" }, 596 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" }, 597 { "TraceItables", "-Xlog:itables=debug" }, 598 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" }, 599 { "TraceSafepoint", "-Xlog:safepoint=debug" }, 600 { "TraceStartupTime", "-Xlog:startuptime" }, 601 { "TraceVMOperation", "-Xlog:vmoperation=debug" }, 602 { "PrintVtables", "-Xlog:vtables=debug" }, 603 { "VerboseVerification", "-Xlog:verification" }, 604 { NULL, NULL } 605 }; 606 #endif //PRODUCT 607 608 // Return true if "v" is less than "other", where "other" may be "undefined". 609 static bool version_less_than(JDK_Version v, JDK_Version other) { 610 assert(!v.is_undefined(), "must be defined"); 611 if (!other.is_undefined() && v.compare(other) >= 0) { 612 return false; 613 } else { 614 return true; 615 } 616 } 617 618 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag); 619 620 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) { 621 // Allow extensions to have priority 622 if (lookup_special_flag_ext(flag_name, flag)) { 623 return true; 624 } 625 626 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 627 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 628 flag = special_jvm_flags[i]; 629 return true; 630 } 631 } 632 return false; 633 } 634 635 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) { 636 assert(version != NULL, "Must provide a version buffer"); 637 SpecialFlag flag; 638 if (lookup_special_flag(flag_name, flag)) { 639 if (!flag.obsolete_in.is_undefined()) { 640 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 641 *version = flag.obsolete_in; 642 return true; 643 } 644 } 645 } 646 return false; 647 } 648 649 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) { 650 assert(version != NULL, "Must provide a version buffer"); 651 SpecialFlag flag; 652 if (lookup_special_flag(flag_name, flag)) { 653 if (!flag.deprecated_in.is_undefined()) { 654 if (version_less_than(JDK_Version::current(), flag.obsolete_in) && 655 version_less_than(JDK_Version::current(), flag.expired_in)) { 656 *version = flag.deprecated_in; 657 return 1; 658 } else { 659 return -1; 660 } 661 } 662 } 663 return 0; 664 } 665 666 #ifndef PRODUCT 667 const char* Arguments::removed_develop_logging_flag_name(const char* name){ 668 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) { 669 const AliasedFlag& flag = removed_develop_logging_flags[i]; 670 if (strcmp(flag.alias_name, name) == 0) { 671 return flag.real_name; 672 } 673 } 674 return NULL; 675 } 676 #endif // PRODUCT 677 678 const char* Arguments::real_flag_name(const char *flag_name) { 679 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) { 680 const AliasedFlag& flag_status = aliased_jvm_flags[i]; 681 if (strcmp(flag_status.alias_name, flag_name) == 0) { 682 return flag_status.real_name; 683 } 684 } 685 return flag_name; 686 } 687 688 #ifdef ASSERT 689 static bool lookup_special_flag(const char *flag_name, size_t skip_index) { 690 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 691 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 692 return true; 693 } 694 } 695 return false; 696 } 697 698 // Verifies the correctness of the entries in the special_jvm_flags table. 699 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion 700 // version being earlier than the deprecation version, then a warning is issued 701 // and verification fails - by returning false. If it is detected that the table 702 // is out of date, with respect to the current version, then a warning is issued 703 // but verification does not fail. This allows the VM to operate when the version 704 // is first updated, without needing to update all the impacted flags at the 705 // same time. 706 static bool verify_special_jvm_flags() { 707 bool success = true; 708 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 709 const SpecialFlag& flag = special_jvm_flags[i]; 710 if (lookup_special_flag(flag.name, i)) { 711 warning("Duplicate special flag declaration \"%s\"", flag.name); 712 success = false; 713 } 714 if (flag.deprecated_in.is_undefined() && 715 flag.obsolete_in.is_undefined()) { 716 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name); 717 success = false; 718 } 719 720 if (!flag.deprecated_in.is_undefined()) { 721 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) { 722 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name); 723 success = false; 724 } 725 726 if (!version_less_than(flag.deprecated_in, flag.expired_in)) { 727 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name); 728 success = false; 729 } 730 } 731 732 if (!flag.obsolete_in.is_undefined()) { 733 if (!version_less_than(flag.obsolete_in, flag.expired_in)) { 734 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name); 735 success = false; 736 } 737 738 // if flag has become obsolete it should not have a "globals" flag defined anymore. 739 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 740 if (Flag::find_flag(flag.name) != NULL) { 741 // Temporarily disable the warning: 8196739 742 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name); 743 } 744 } 745 } 746 747 if (!flag.expired_in.is_undefined()) { 748 // if flag has become expired it should not have a "globals" flag defined anymore. 749 if (!version_less_than(JDK_Version::current(), flag.expired_in)) { 750 if (Flag::find_flag(flag.name) != NULL) { 751 // Temporarily disable the warning: 8196739 752 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name); 753 } 754 } 755 } 756 757 } 758 return success; 759 } 760 #endif 761 762 // Parses a size specification string. 763 bool Arguments::atojulong(const char *s, julong* result) { 764 julong n = 0; 765 766 // First char must be a digit. Don't allow negative numbers or leading spaces. 767 if (!isdigit(*s)) { 768 return false; 769 } 770 771 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); 772 char* remainder; 773 errno = 0; 774 n = strtoull(s, &remainder, (is_hex ? 16 : 10)); 775 if (errno != 0) { 776 return false; 777 } 778 779 // Fail if no number was read at all or if the remainder contains more than a single non-digit character. 780 if (remainder == s || strlen(remainder) > 1) { 781 return false; 782 } 783 784 switch (*remainder) { 785 case 'T': case 't': 786 *result = n * G * K; 787 // Check for overflow. 788 if (*result/((julong)G * K) != n) return false; 789 return true; 790 case 'G': case 'g': 791 *result = n * G; 792 if (*result/G != n) return false; 793 return true; 794 case 'M': case 'm': 795 *result = n * M; 796 if (*result/M != n) return false; 797 return true; 798 case 'K': case 'k': 799 *result = n * K; 800 if (*result/K != n) return false; 801 return true; 802 case '\0': 803 *result = n; 804 return true; 805 default: 806 return false; 807 } 808 } 809 810 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) { 811 if (size < min_size) return arg_too_small; 812 if (size > max_size) return arg_too_big; 813 return arg_in_range; 814 } 815 816 // Describe an argument out of range error 817 void Arguments::describe_range_error(ArgsRange errcode) { 818 switch(errcode) { 819 case arg_too_big: 820 jio_fprintf(defaultStream::error_stream(), 821 "The specified size exceeds the maximum " 822 "representable size.\n"); 823 break; 824 case arg_too_small: 825 case arg_unreadable: 826 case arg_in_range: 827 // do nothing for now 828 break; 829 default: 830 ShouldNotReachHere(); 831 } 832 } 833 834 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) { 835 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) { 836 return true; 837 } else { 838 return false; 839 } 840 } 841 842 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) { 843 char* end; 844 errno = 0; 845 double v = strtod(value, &end); 846 if ((errno != 0) || (*end != 0)) { 847 return false; 848 } 849 850 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) { 851 return true; 852 } 853 return false; 854 } 855 856 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) { 857 julong v; 858 int int_v; 859 intx intx_v; 860 bool is_neg = false; 861 Flag* result = Flag::find_flag(name, strlen(name)); 862 863 if (result == NULL) { 864 return false; 865 } 866 867 // Check the sign first since atojulong() parses only unsigned values. 868 if (*value == '-') { 869 if (!result->is_intx() && !result->is_int()) { 870 return false; 871 } 872 value++; 873 is_neg = true; 874 } 875 if (!Arguments::atojulong(value, &v)) { 876 return false; 877 } 878 if (result->is_int()) { 879 int_v = (int) v; 880 if (is_neg) { 881 int_v = -int_v; 882 } 883 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS; 884 } else if (result->is_uint()) { 885 uint uint_v = (uint) v; 886 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS; 887 } else if (result->is_intx()) { 888 intx_v = (intx) v; 889 if (is_neg) { 890 intx_v = -intx_v; 891 } 892 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS; 893 } else if (result->is_uintx()) { 894 uintx uintx_v = (uintx) v; 895 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS; 896 } else if (result->is_uint64_t()) { 897 uint64_t uint64_t_v = (uint64_t) v; 898 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS; 899 } else if (result->is_size_t()) { 900 size_t size_t_v = (size_t) v; 901 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS; 902 } else if (result->is_double()) { 903 double double_v = (double) v; 904 return CommandLineFlags::doubleAtPut(result, &double_v, origin) == Flag::SUCCESS; 905 } else { 906 return false; 907 } 908 } 909 910 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) { 911 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false; 912 // Contract: CommandLineFlags always returns a pointer that needs freeing. 913 FREE_C_HEAP_ARRAY(char, value); 914 return true; 915 } 916 917 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) { 918 const char* old_value = ""; 919 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false; 920 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 921 size_t new_len = strlen(new_value); 922 const char* value; 923 char* free_this_too = NULL; 924 if (old_len == 0) { 925 value = new_value; 926 } else if (new_len == 0) { 927 value = old_value; 928 } else { 929 size_t length = old_len + 1 + new_len + 1; 930 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments); 931 // each new setting adds another LINE to the switch: 932 jio_snprintf(buf, length, "%s\n%s", old_value, new_value); 933 value = buf; 934 free_this_too = buf; 935 } 936 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 937 // CommandLineFlags always returns a pointer that needs freeing. 938 FREE_C_HEAP_ARRAY(char, value); 939 if (free_this_too != NULL) { 940 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 941 FREE_C_HEAP_ARRAY(char, free_this_too); 942 } 943 return true; 944 } 945 946 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) { 947 const char* real_name = real_flag_name(arg); 948 JDK_Version since = JDK_Version(); 949 switch (is_deprecated_flag(arg, &since)) { 950 case -1: 951 return NULL; // obsolete or expired, don't process normally 952 case 0: 953 return real_name; 954 case 1: { 955 if (warn) { 956 char version[256]; 957 since.to_string(version, sizeof(version)); 958 if (real_name != arg) { 959 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.", 960 arg, version, real_name); 961 } else { 962 warning("Option %s was deprecated in version %s and will likely be removed in a future release.", 963 arg, version); 964 } 965 } 966 return real_name; 967 } 968 } 969 ShouldNotReachHere(); 970 return NULL; 971 } 972 973 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) { 974 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5}; 975 // Set tagset string buffer at max size of 256, large enough for any alias tagset 976 const int max_tagset_size = 256; 977 int max_tagset_len = max_tagset_size - 1; 978 char tagset_buffer[max_tagset_size]; 979 tagset_buffer[0] = '\0'; 980 981 // Write tag-set for aliased logging option, in string list form 982 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]); 983 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) { 984 if (i > 0) { 985 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer)); 986 } 987 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer)); 988 } 989 if (!alf.exactMatch) { 990 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer)); 991 } 992 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.", 993 (on) ? "+" : "-", 994 name, 995 tagset_buffer, 996 (on) ? LogLevel::name(alf.level) : "off"); 997 } 998 999 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){ 1000 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) { 1001 const AliasedLoggingFlag& alf = aliased_logging_flags[i]; 1002 if (strcmp(alf.alias_name, name) == 0) { 1003 log_deprecated_flag(name, on, alf); 1004 return alf; 1005 } 1006 } 1007 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)}; 1008 return a; 1009 } 1010 1011 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) { 1012 1013 // range of acceptable characters spelled out for portability reasons 1014 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 1015 #define BUFLEN 255 1016 char name[BUFLEN+1]; 1017 char dummy; 1018 const char* real_name; 1019 bool warn_if_deprecated = true; 1020 1021 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 1022 AliasedLoggingFlag alf = catch_logging_aliases(name, false); 1023 if (alf.alias_name != NULL){ 1024 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1025 return true; 1026 } 1027 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1028 if (real_name == NULL) { 1029 return false; 1030 } 1031 return set_bool_flag(real_name, false, origin); 1032 } 1033 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 1034 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 1035 if (alf.alias_name != NULL){ 1036 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1037 return true; 1038 } 1039 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1040 if (real_name == NULL) { 1041 return false; 1042 } 1043 return set_bool_flag(real_name, true, origin); 1044 } 1045 1046 char punct; 1047 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 1048 const char* value = strchr(arg, '=') + 1; 1049 Flag* flag; 1050 1051 // this scanf pattern matches both strings (handled here) and numbers (handled later)) 1052 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 1053 if (alf.alias_name != NULL) { 1054 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 1055 return true; 1056 } 1057 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1058 if (real_name == NULL) { 1059 return false; 1060 } 1061 flag = Flag::find_flag(real_name); 1062 if (flag != NULL && flag->is_ccstr()) { 1063 if (flag->ccstr_accumulates()) { 1064 return append_to_string_flag(real_name, value, origin); 1065 } else { 1066 if (value[0] == '\0') { 1067 value = NULL; 1068 } 1069 return set_string_flag(real_name, value, origin); 1070 } 1071 } else { 1072 warn_if_deprecated = false; // if arg is deprecated, we've already done warning... 1073 } 1074 } 1075 1076 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 1077 const char* value = strchr(arg, '=') + 1; 1078 // -XX:Foo:=xxx will reset the string flag to the given value. 1079 if (value[0] == '\0') { 1080 value = NULL; 1081 } 1082 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1083 if (real_name == NULL) { 1084 return false; 1085 } 1086 return set_string_flag(real_name, value, origin); 1087 } 1088 1089 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]" 1090 #define SIGNED_NUMBER_RANGE "[-0123456789]" 1091 #define NUMBER_RANGE "[0123456789eE+-]" 1092 char value[BUFLEN + 1]; 1093 char value2[BUFLEN + 1]; 1094 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 1095 // Looks like a floating-point number -- try again with more lenient format string 1096 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 1097 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1098 if (real_name == NULL) { 1099 return false; 1100 } 1101 return set_fp_numeric_flag(real_name, value, origin); 1102 } 1103 } 1104 1105 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 1106 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 1107 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1108 if (real_name == NULL) { 1109 return false; 1110 } 1111 return set_numeric_flag(real_name, value, origin); 1112 } 1113 1114 return false; 1115 } 1116 1117 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 1118 assert(bldarray != NULL, "illegal argument"); 1119 1120 if (arg == NULL) { 1121 return; 1122 } 1123 1124 int new_count = *count + 1; 1125 1126 // expand the array and add arg to the last element 1127 if (*bldarray == NULL) { 1128 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments); 1129 } else { 1130 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments); 1131 } 1132 (*bldarray)[*count] = os::strdup_check_oom(arg); 1133 *count = new_count; 1134 } 1135 1136 void Arguments::build_jvm_args(const char* arg) { 1137 add_string(&_jvm_args_array, &_num_jvm_args, arg); 1138 } 1139 1140 void Arguments::build_jvm_flags(const char* arg) { 1141 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 1142 } 1143 1144 // utility function to return a string that concatenates all 1145 // strings in a given char** array 1146 const char* Arguments::build_resource_string(char** args, int count) { 1147 if (args == NULL || count == 0) { 1148 return NULL; 1149 } 1150 size_t length = 0; 1151 for (int i = 0; i < count; i++) { 1152 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character 1153 } 1154 char* s = NEW_RESOURCE_ARRAY(char, length); 1155 char* dst = s; 1156 for (int j = 0; j < count; j++) { 1157 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character 1158 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character 1159 dst += offset; 1160 length -= offset; 1161 } 1162 return (const char*) s; 1163 } 1164 1165 void Arguments::print_on(outputStream* st) { 1166 st->print_cr("VM Arguments:"); 1167 if (num_jvm_flags() > 0) { 1168 st->print("jvm_flags: "); print_jvm_flags_on(st); 1169 st->cr(); 1170 } 1171 if (num_jvm_args() > 0) { 1172 st->print("jvm_args: "); print_jvm_args_on(st); 1173 st->cr(); 1174 } 1175 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 1176 if (_java_class_path != NULL) { 1177 char* path = _java_class_path->value(); 1178 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 1179 } 1180 st->print_cr("Launcher Type: %s", _sun_java_launcher); 1181 } 1182 1183 void Arguments::print_summary_on(outputStream* st) { 1184 // Print the command line. Environment variables that are helpful for 1185 // reproducing the problem are written later in the hs_err file. 1186 // flags are from setting file 1187 if (num_jvm_flags() > 0) { 1188 st->print_raw("Settings File: "); 1189 print_jvm_flags_on(st); 1190 st->cr(); 1191 } 1192 // args are the command line and environment variable arguments. 1193 st->print_raw("Command Line: "); 1194 if (num_jvm_args() > 0) { 1195 print_jvm_args_on(st); 1196 } 1197 // this is the classfile and any arguments to the java program 1198 if (java_command() != NULL) { 1199 st->print("%s", java_command()); 1200 } 1201 st->cr(); 1202 } 1203 1204 void Arguments::print_jvm_flags_on(outputStream* st) { 1205 if (_num_jvm_flags > 0) { 1206 for (int i=0; i < _num_jvm_flags; i++) { 1207 st->print("%s ", _jvm_flags_array[i]); 1208 } 1209 } 1210 } 1211 1212 void Arguments::print_jvm_args_on(outputStream* st) { 1213 if (_num_jvm_args > 0) { 1214 for (int i=0; i < _num_jvm_args; i++) { 1215 st->print("%s ", _jvm_args_array[i]); 1216 } 1217 } 1218 } 1219 1220 bool Arguments::process_argument(const char* arg, 1221 jboolean ignore_unrecognized, 1222 Flag::Flags origin) { 1223 JDK_Version since = JDK_Version(); 1224 1225 if (parse_argument(arg, origin)) { 1226 return true; 1227 } 1228 1229 // Determine if the flag has '+', '-', or '=' characters. 1230 bool has_plus_minus = (*arg == '+' || *arg == '-'); 1231 const char* const argname = has_plus_minus ? arg + 1 : arg; 1232 1233 size_t arg_len; 1234 const char* equal_sign = strchr(argname, '='); 1235 if (equal_sign == NULL) { 1236 arg_len = strlen(argname); 1237 } else { 1238 arg_len = equal_sign - argname; 1239 } 1240 1241 // Only make the obsolete check for valid arguments. 1242 if (arg_len <= BUFLEN) { 1243 // Construct a string which consists only of the argument name without '+', '-', or '='. 1244 char stripped_argname[BUFLEN+1]; // +1 for '\0' 1245 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0' 1246 if (is_obsolete_flag(stripped_argname, &since)) { 1247 char version[256]; 1248 since.to_string(version, sizeof(version)); 1249 warning("Ignoring option %s; support was removed in %s", stripped_argname, version); 1250 return true; 1251 } 1252 #ifndef PRODUCT 1253 else { 1254 const char* replacement; 1255 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){ 1256 log_warning(arguments)("%s has been removed. Please use %s instead.", 1257 stripped_argname, 1258 replacement); 1259 return false; 1260 } 1261 } 1262 #endif //PRODUCT 1263 } 1264 1265 // For locked flags, report a custom error message if available. 1266 // Otherwise, report the standard unrecognized VM option. 1267 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true); 1268 if (found_flag != NULL) { 1269 char locked_message_buf[BUFLEN]; 1270 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN); 1271 if (strlen(locked_message_buf) == 0) { 1272 if (found_flag->is_bool() && !has_plus_minus) { 1273 jio_fprintf(defaultStream::error_stream(), 1274 "Missing +/- setting for VM option '%s'\n", argname); 1275 } else if (!found_flag->is_bool() && has_plus_minus) { 1276 jio_fprintf(defaultStream::error_stream(), 1277 "Unexpected +/- setting in VM option '%s'\n", argname); 1278 } else { 1279 jio_fprintf(defaultStream::error_stream(), 1280 "Improperly specified VM option '%s'\n", argname); 1281 } 1282 } else { 1283 #ifdef PRODUCT 1284 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) || 1285 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD)); 1286 if (ignore_unrecognized && mismatched) { 1287 return true; 1288 } 1289 #endif 1290 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 1291 } 1292 } else { 1293 if (ignore_unrecognized) { 1294 return true; 1295 } 1296 jio_fprintf(defaultStream::error_stream(), 1297 "Unrecognized VM option '%s'\n", argname); 1298 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true); 1299 if (fuzzy_matched != NULL) { 1300 jio_fprintf(defaultStream::error_stream(), 1301 "Did you mean '%s%s%s'? ", 1302 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 1303 fuzzy_matched->_name, 1304 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 1305 } 1306 } 1307 1308 // allow for commandline "commenting out" options like -XX:#+Verbose 1309 return arg[0] == '#'; 1310 } 1311 1312 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 1313 FILE* stream = fopen(file_name, "rb"); 1314 if (stream == NULL) { 1315 if (should_exist) { 1316 jio_fprintf(defaultStream::error_stream(), 1317 "Could not open settings file %s\n", file_name); 1318 return false; 1319 } else { 1320 return true; 1321 } 1322 } 1323 1324 char token[1024]; 1325 int pos = 0; 1326 1327 bool in_white_space = true; 1328 bool in_comment = false; 1329 bool in_quote = false; 1330 char quote_c = 0; 1331 bool result = true; 1332 1333 int c = getc(stream); 1334 while(c != EOF && pos < (int)(sizeof(token)-1)) { 1335 if (in_white_space) { 1336 if (in_comment) { 1337 if (c == '\n') in_comment = false; 1338 } else { 1339 if (c == '#') in_comment = true; 1340 else if (!isspace(c)) { 1341 in_white_space = false; 1342 token[pos++] = c; 1343 } 1344 } 1345 } else { 1346 if (c == '\n' || (!in_quote && isspace(c))) { 1347 // token ends at newline, or at unquoted whitespace 1348 // this allows a way to include spaces in string-valued options 1349 token[pos] = '\0'; 1350 logOption(token); 1351 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1352 build_jvm_flags(token); 1353 pos = 0; 1354 in_white_space = true; 1355 in_quote = false; 1356 } else if (!in_quote && (c == '\'' || c == '"')) { 1357 in_quote = true; 1358 quote_c = c; 1359 } else if (in_quote && (c == quote_c)) { 1360 in_quote = false; 1361 } else { 1362 token[pos++] = c; 1363 } 1364 } 1365 c = getc(stream); 1366 } 1367 if (pos > 0) { 1368 token[pos] = '\0'; 1369 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1370 build_jvm_flags(token); 1371 } 1372 fclose(stream); 1373 return result; 1374 } 1375 1376 //============================================================================================================= 1377 // Parsing of properties (-D) 1378 1379 const char* Arguments::get_property(const char* key) { 1380 return PropertyList_get_value(system_properties(), key); 1381 } 1382 1383 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) { 1384 const char* eq = strchr(prop, '='); 1385 const char* key; 1386 const char* value = ""; 1387 1388 if (eq == NULL) { 1389 // property doesn't have a value, thus use passed string 1390 key = prop; 1391 } else { 1392 // property have a value, thus extract it and save to the 1393 // allocated string 1394 size_t key_len = eq - prop; 1395 char* tmp_key = AllocateHeap(key_len + 1, mtArguments); 1396 1397 jio_snprintf(tmp_key, key_len + 1, "%s", prop); 1398 key = tmp_key; 1399 1400 value = &prop[key_len + 1]; 1401 } 1402 1403 if (strcmp(key, "java.compiler") == 0) { 1404 process_java_compiler_argument(value); 1405 // Record value in Arguments, but let it get passed to Java. 1406 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 1407 strcmp(key, "sun.java.launcher.pid") == 0) { 1408 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1409 // private and are processed in process_sun_java_launcher_properties(); 1410 // the sun.java.launcher property is passed on to the java application 1411 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1412 // append is true, writable is true, internal is false 1413 PropertyList_unique_add(&_system_properties, key, value, AppendProperty, 1414 WriteableProperty, ExternalProperty); 1415 } else { 1416 if (strcmp(key, "sun.java.command") == 0) { 1417 char *old_java_command = _java_command; 1418 _java_command = os::strdup_check_oom(value, mtArguments); 1419 if (old_java_command != NULL) { 1420 os::free(old_java_command); 1421 } 1422 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1423 const char* old_java_vendor_url_bug = _java_vendor_url_bug; 1424 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1425 // its value without going through the property list or making a Java call. 1426 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments); 1427 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) { 1428 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL"); 1429 os::free((void *)old_java_vendor_url_bug); 1430 } 1431 } 1432 1433 // Create new property and add at the end of the list 1434 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal); 1435 } 1436 1437 if (key != prop) { 1438 // SystemProperty copy passed value, thus free previously allocated 1439 // memory 1440 FreeHeap((void *)key); 1441 } 1442 1443 return true; 1444 } 1445 1446 #if INCLUDE_CDS 1447 void Arguments::check_unsupported_dumping_properties() { 1448 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump"); 1449 const char* unsupported_properties[] = { "jdk.module.main", 1450 "jdk.module.limitmods", 1451 "jdk.module.path", 1452 "jdk.module.upgrade.path", 1453 "jdk.module.patch.0" }; 1454 const char* unsupported_options[] = { "-m", // cannot use at dump time 1455 "--limit-modules", // ignored at dump time 1456 "--module-path", // ignored at dump time 1457 "--upgrade-module-path", // ignored at dump time 1458 "--patch-module" // ignored at dump time 1459 }; 1460 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be"); 1461 // If a vm option is found in the unsupported_options array with index less than the info_idx, 1462 // vm will exit with an error message. Otherwise, it will print an informational message if 1463 // -Xlog:cds is enabled. 1464 uint info_idx = 1; 1465 SystemProperty* sp = system_properties(); 1466 while (sp != NULL) { 1467 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) { 1468 if (strcmp(sp->key(), unsupported_properties[i]) == 0) { 1469 if (i < info_idx) { 1470 vm_exit_during_initialization( 1471 "Cannot use the following option when dumping the shared archive", unsupported_options[i]); 1472 } else { 1473 log_info(cds)("Info: the %s option is ignored when dumping the shared archive", 1474 unsupported_options[i]); 1475 } 1476 } 1477 } 1478 sp = sp->next(); 1479 } 1480 1481 // Check for an exploded module build in use with -Xshare:dump. 1482 if (!has_jimage()) { 1483 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build"); 1484 } 1485 } 1486 #endif 1487 1488 //=========================================================================================================== 1489 // Setting int/mixed/comp mode flags 1490 1491 void Arguments::set_mode_flags(Mode mode) { 1492 // Set up default values for all flags. 1493 // If you add a flag to any of the branches below, 1494 // add a default value for it here. 1495 set_java_compiler(false); 1496 _mode = mode; 1497 1498 // Ensure Agent_OnLoad has the correct initial values. 1499 // This may not be the final mode; mode may change later in onload phase. 1500 PropertyList_unique_add(&_system_properties, "java.vm.info", 1501 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty); 1502 1503 UseInterpreter = true; 1504 UseCompiler = true; 1505 UseLoopCounter = true; 1506 1507 // Default values may be platform/compiler dependent - 1508 // use the saved values 1509 ClipInlining = Arguments::_ClipInlining; 1510 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1511 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1512 BackgroundCompilation = Arguments::_BackgroundCompilation; 1513 if (TieredCompilation) { 1514 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) { 1515 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog; 1516 } 1517 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) { 1518 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold; 1519 } 1520 } 1521 1522 // Change from defaults based on mode 1523 switch (mode) { 1524 default: 1525 ShouldNotReachHere(); 1526 break; 1527 case _int: 1528 UseCompiler = false; 1529 UseLoopCounter = false; 1530 AlwaysCompileLoopMethods = false; 1531 UseOnStackReplacement = false; 1532 break; 1533 case _mixed: 1534 // same as default 1535 break; 1536 case _comp: 1537 UseInterpreter = false; 1538 BackgroundCompilation = false; 1539 ClipInlining = false; 1540 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1541 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1542 // compile a level 4 (C2) and then continue executing it. 1543 if (TieredCompilation) { 1544 Tier3InvokeNotifyFreqLog = 0; 1545 Tier4InvocationThreshold = 0; 1546 } 1547 break; 1548 } 1549 } 1550 1551 // Conflict: required to use shared spaces (-Xshare:on), but 1552 // incompatible command line options were chosen. 1553 static void no_shared_spaces(const char* message) { 1554 if (RequireSharedSpaces) { 1555 jio_fprintf(defaultStream::error_stream(), 1556 "Class data sharing is inconsistent with other specified options.\n"); 1557 vm_exit_during_initialization("Unable to use shared archive.", message); 1558 } else { 1559 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1560 } 1561 } 1562 1563 // Returns threshold scaled with the value of scale. 1564 // If scale < 0.0, threshold is returned without scaling. 1565 intx Arguments::scaled_compile_threshold(intx threshold, double scale) { 1566 if (scale == 1.0 || scale < 0.0) { 1567 return threshold; 1568 } else { 1569 return (intx)(threshold * scale); 1570 } 1571 } 1572 1573 // Returns freq_log scaled with the value of scale. 1574 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1]. 1575 // If scale < 0.0, freq_log is returned without scaling. 1576 intx Arguments::scaled_freq_log(intx freq_log, double scale) { 1577 // Check if scaling is necessary or if negative value was specified. 1578 if (scale == 1.0 || scale < 0.0) { 1579 return freq_log; 1580 } 1581 // Check values to avoid calculating log2 of 0. 1582 if (scale == 0.0 || freq_log == 0) { 1583 return 0; 1584 } 1585 // Determine the maximum notification frequency value currently supported. 1586 // The largest mask value that the interpreter/C1 can handle is 1587 // of length InvocationCounter::number_of_count_bits. Mask values are always 1588 // one bit shorter then the value of the notification frequency. Set 1589 // max_freq_bits accordingly. 1590 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1; 1591 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale); 1592 if (scaled_freq == 0) { 1593 // Return 0 right away to avoid calculating log2 of 0. 1594 return 0; 1595 } else if (scaled_freq > nth_bit(max_freq_bits)) { 1596 return max_freq_bits; 1597 } else { 1598 return log2_intptr(scaled_freq); 1599 } 1600 } 1601 1602 void Arguments::set_tiered_flags() { 1603 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. 1604 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { 1605 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); 1606 } 1607 if (CompilationPolicyChoice < 2) { 1608 vm_exit_during_initialization( 1609 "Incompatible compilation policy selected", NULL); 1610 } 1611 // Increase the code cache size - tiered compiles a lot more. 1612 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1613 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize, 1614 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5)); 1615 } 1616 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M 1617 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { 1618 FLAG_SET_ERGO(bool, SegmentedCodeCache, true); 1619 } 1620 if (!UseInterpreter) { // -Xcomp 1621 Tier3InvokeNotifyFreqLog = 0; 1622 Tier4InvocationThreshold = 0; 1623 } 1624 1625 if (CompileThresholdScaling < 0) { 1626 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL); 1627 } 1628 1629 // Scale tiered compilation thresholds. 1630 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged. 1631 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 1632 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog)); 1633 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog)); 1634 1635 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold)); 1636 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold)); 1637 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold)); 1638 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold)); 1639 1640 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here 1641 // once these thresholds become supported. 1642 1643 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog)); 1644 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog)); 1645 1646 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog)); 1647 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog)); 1648 1649 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog)); 1650 1651 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold)); 1652 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold)); 1653 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold)); 1654 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold)); 1655 } 1656 } 1657 1658 void set_object_alignment() { 1659 // Object alignment. 1660 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1661 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1662 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1663 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1664 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1665 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1666 1667 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1668 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1669 1670 // Oop encoding heap max 1671 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1672 1673 if (SurvivorAlignmentInBytes == 0) { 1674 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1675 } 1676 } 1677 1678 size_t Arguments::max_heap_for_compressed_oops() { 1679 // Avoid sign flip. 1680 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1681 // We need to fit both the NULL page and the heap into the memory budget, while 1682 // keeping alignment constraints of the heap. To guarantee the latter, as the 1683 // NULL page is located before the heap, we pad the NULL page to the conservative 1684 // maximum alignment that the GC may ever impose upon the heap. 1685 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(), 1686 _conservative_max_heap_alignment); 1687 1688 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1689 NOT_LP64(ShouldNotReachHere(); return 0); 1690 } 1691 1692 void Arguments::set_use_compressed_oops() { 1693 #ifndef ZERO 1694 #ifdef _LP64 1695 // MaxHeapSize is not set up properly at this point, but 1696 // the only value that can override MaxHeapSize if we are 1697 // to use UseCompressedOops is InitialHeapSize. 1698 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1699 1700 if (max_heap_size <= max_heap_for_compressed_oops()) { 1701 #if !defined(COMPILER1) || defined(TIERED) 1702 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1703 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1704 } 1705 #endif 1706 } else { 1707 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1708 warning("Max heap size too large for Compressed Oops"); 1709 FLAG_SET_DEFAULT(UseCompressedOops, false); 1710 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1711 } 1712 } 1713 #endif // _LP64 1714 #endif // ZERO 1715 } 1716 1717 1718 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1719 // set_use_compressed_oops(). 1720 void Arguments::set_use_compressed_klass_ptrs() { 1721 #ifndef ZERO 1722 #ifdef _LP64 1723 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1724 if (!UseCompressedOops) { 1725 if (UseCompressedClassPointers) { 1726 warning("UseCompressedClassPointers requires UseCompressedOops"); 1727 } 1728 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1729 } else { 1730 // Turn on UseCompressedClassPointers too 1731 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1732 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1733 } 1734 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1735 if (UseCompressedClassPointers) { 1736 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1737 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1738 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1739 } 1740 } 1741 } 1742 #endif // _LP64 1743 #endif // !ZERO 1744 } 1745 1746 void Arguments::set_conservative_max_heap_alignment() { 1747 // The conservative maximum required alignment for the heap is the maximum of 1748 // the alignments imposed by several sources: any requirements from the heap 1749 // itself, the collector policy and the maximum page size we may run the VM 1750 // with. 1751 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment(); 1752 _conservative_max_heap_alignment = MAX4(heap_alignment, 1753 (size_t)os::vm_allocation_granularity(), 1754 os::max_page_size(), 1755 CollectorPolicy::compute_heap_alignment()); 1756 } 1757 1758 #ifdef TIERED 1759 bool Arguments::compilation_mode_selected() { 1760 return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) || 1761 !FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler)); 1762 1763 } 1764 1765 void Arguments::select_compilation_mode_ergonomically() { 1766 #if defined(_WINDOWS) && !defined(_LP64) 1767 if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) { 1768 FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true); 1769 } 1770 #endif 1771 if (NeverActAsServerClassMachine) { 1772 set_client_compilation_mode(); 1773 } 1774 } 1775 #endif //TIERED 1776 1777 #if INCLUDE_JVMCI 1778 void Arguments::set_jvmci_specific_flags() { 1779 if (UseJVMCICompiler) { 1780 if (FLAG_IS_DEFAULT(TypeProfileWidth)) { 1781 FLAG_SET_DEFAULT(TypeProfileWidth, 8); 1782 } 1783 if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) { 1784 FLAG_SET_DEFAULT(OnStackReplacePercentage, 933); 1785 } 1786 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1787 FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M); 1788 } 1789 if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) { 1790 FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M); 1791 } 1792 if (FLAG_IS_DEFAULT(MetaspaceSize)) { 1793 FLAG_SET_DEFAULT(MetaspaceSize, 12*M); 1794 } 1795 if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) { 1796 FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K); 1797 } 1798 if (TieredStopAtLevel != CompLevel_full_optimization) { 1799 // Currently JVMCI compiler can only work at the full optimization level 1800 warning("forcing TieredStopAtLevel to full optimization because JVMCI is enabled"); 1801 TieredStopAtLevel = CompLevel_full_optimization; 1802 } 1803 if (FLAG_IS_DEFAULT(TypeProfileLevel)) { 1804 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 1805 } 1806 } 1807 } 1808 #endif 1809 1810 jint Arguments::set_ergonomics_flags() { 1811 #ifdef TIERED 1812 if (!compilation_mode_selected()) { 1813 select_compilation_mode_ergonomically(); 1814 } 1815 #endif 1816 1817 GCConfig::initialize(); 1818 1819 #if COMPILER2_OR_JVMCI 1820 // Shared spaces work fine with other GCs but causes bytecode rewriting 1821 // to be disabled, which hurts interpreter performance and decreases 1822 // server performance. When -server is specified, keep the default off 1823 // unless it is asked for. Future work: either add bytecode rewriting 1824 // at link time, or rewrite bytecodes in non-shared methods. 1825 if (is_server_compilation_mode_vm() && !DumpSharedSpaces && !RequireSharedSpaces && 1826 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { 1827 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); 1828 } 1829 #endif 1830 1831 #if defined(IA32) 1832 // Only server compiler can optimize safepoints well enough. 1833 if (!is_server_compilation_mode_vm()) { 1834 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false); 1835 } 1836 #endif 1837 1838 set_conservative_max_heap_alignment(); 1839 1840 #ifndef ZERO 1841 #ifdef _LP64 1842 set_use_compressed_oops(); 1843 1844 // set_use_compressed_klass_ptrs() must be called after calling 1845 // set_use_compressed_oops(). 1846 set_use_compressed_klass_ptrs(); 1847 1848 // Also checks that certain machines are slower with compressed oops 1849 // in vm_version initialization code. 1850 #endif // _LP64 1851 #endif // !ZERO 1852 1853 return JNI_OK; 1854 } 1855 1856 julong Arguments::limit_by_allocatable_memory(julong limit) { 1857 julong max_allocatable; 1858 julong result = limit; 1859 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1860 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1861 } 1862 return result; 1863 } 1864 1865 // Use static initialization to get the default before parsing 1866 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1867 1868 void Arguments::set_heap_size() { 1869 julong phys_mem = 1870 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1871 : (julong)MaxRAM; 1872 1873 // Convert deprecated flags 1874 if (FLAG_IS_DEFAULT(MaxRAMPercentage) && 1875 !FLAG_IS_DEFAULT(MaxRAMFraction)) 1876 MaxRAMPercentage = 100.0 / MaxRAMFraction; 1877 1878 if (FLAG_IS_DEFAULT(MinRAMPercentage) && 1879 !FLAG_IS_DEFAULT(MinRAMFraction)) 1880 MinRAMPercentage = 100.0 / MinRAMFraction; 1881 1882 if (FLAG_IS_DEFAULT(InitialRAMPercentage) && 1883 !FLAG_IS_DEFAULT(InitialRAMFraction)) 1884 InitialRAMPercentage = 100.0 / InitialRAMFraction; 1885 1886 // If the maximum heap size has not been set with -Xmx, 1887 // then set it as fraction of the size of physical memory, 1888 // respecting the maximum and minimum sizes of the heap. 1889 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1890 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100); 1891 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100); 1892 if (reasonable_min < MaxHeapSize) { 1893 // Small physical memory, so use a minimum fraction of it for the heap 1894 reasonable_max = reasonable_min; 1895 } else { 1896 // Not-small physical memory, so require a heap at least 1897 // as large as MaxHeapSize 1898 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 1899 } 1900 1901 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 1902 // Limit the heap size to ErgoHeapSizeLimit 1903 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 1904 } 1905 if (UseCompressedOops) { 1906 // Limit the heap size to the maximum possible when using compressed oops 1907 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 1908 1909 // HeapBaseMinAddress can be greater than default but not less than. 1910 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 1911 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 1912 // matches compressed oops printing flags 1913 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT 1914 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT, 1915 DefaultHeapBaseMinAddress, 1916 DefaultHeapBaseMinAddress/G, 1917 HeapBaseMinAddress); 1918 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 1919 } 1920 } 1921 1922 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 1923 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 1924 // but it should be not less than default MaxHeapSize. 1925 max_coop_heap -= HeapBaseMinAddress; 1926 } 1927 reasonable_max = MIN2(reasonable_max, max_coop_heap); 1928 } 1929 reasonable_max = limit_by_allocatable_memory(reasonable_max); 1930 1931 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 1932 // An initial heap size was specified on the command line, 1933 // so be sure that the maximum size is consistent. Done 1934 // after call to limit_by_allocatable_memory because that 1935 // method might reduce the allocation size. 1936 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 1937 } 1938 1939 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 1940 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max); 1941 } 1942 1943 // If the minimum or initial heap_size have not been set or requested to be set 1944 // ergonomically, set them accordingly. 1945 if (InitialHeapSize == 0 || min_heap_size() == 0) { 1946 julong reasonable_minimum = (julong)(OldSize + NewSize); 1947 1948 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 1949 1950 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 1951 1952 if (InitialHeapSize == 0) { 1953 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100); 1954 1955 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 1956 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 1957 1958 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 1959 1960 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial); 1961 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial); 1962 } 1963 // If the minimum heap size has not been set (via -Xms), 1964 // synchronize with InitialHeapSize to avoid errors with the default value. 1965 if (min_heap_size() == 0) { 1966 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize)); 1967 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 1968 } 1969 } 1970 } 1971 1972 // This option inspects the machine and attempts to set various 1973 // parameters to be optimal for long-running, memory allocation 1974 // intensive jobs. It is intended for machines with large 1975 // amounts of cpu and memory. 1976 jint Arguments::set_aggressive_heap_flags() { 1977 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 1978 // VM, but we may not be able to represent the total physical memory 1979 // available (like having 8gb of memory on a box but using a 32bit VM). 1980 // Thus, we need to make sure we're using a julong for intermediate 1981 // calculations. 1982 julong initHeapSize; 1983 julong total_memory = os::physical_memory(); 1984 1985 if (total_memory < (julong) 256 * M) { 1986 jio_fprintf(defaultStream::error_stream(), 1987 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 1988 vm_exit(1); 1989 } 1990 1991 // The heap size is half of available memory, or (at most) 1992 // all of possible memory less 160mb (leaving room for the OS 1993 // when using ISM). This is the maximum; because adaptive sizing 1994 // is turned on below, the actual space used may be smaller. 1995 1996 initHeapSize = MIN2(total_memory / (julong) 2, 1997 total_memory - (julong) 160 * M); 1998 1999 initHeapSize = limit_by_allocatable_memory(initHeapSize); 2000 2001 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2002 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) { 2003 return JNI_EINVAL; 2004 } 2005 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) { 2006 return JNI_EINVAL; 2007 } 2008 // Currently the minimum size and the initial heap sizes are the same. 2009 set_min_heap_size(initHeapSize); 2010 } 2011 if (FLAG_IS_DEFAULT(NewSize)) { 2012 // Make the young generation 3/8ths of the total heap. 2013 if (FLAG_SET_CMDLINE(size_t, NewSize, 2014 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) { 2015 return JNI_EINVAL; 2016 } 2017 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) { 2018 return JNI_EINVAL; 2019 } 2020 } 2021 2022 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 2023 FLAG_SET_DEFAULT(UseLargePages, true); 2024 #endif 2025 2026 // Increase some data structure sizes for efficiency 2027 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) { 2028 return JNI_EINVAL; 2029 } 2030 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) { 2031 return JNI_EINVAL; 2032 } 2033 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) { 2034 return JNI_EINVAL; 2035 } 2036 2037 // See the OldPLABSize comment below, but replace 'after promotion' 2038 // with 'after copying'. YoungPLABSize is the size of the survivor 2039 // space per-gc-thread buffers. The default is 4kw. 2040 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words 2041 return JNI_EINVAL; 2042 } 2043 2044 // OldPLABSize is the size of the buffers in the old gen that 2045 // UseParallelGC uses to promote live data that doesn't fit in the 2046 // survivor spaces. At any given time, there's one for each gc thread. 2047 // The default size is 1kw. These buffers are rarely used, since the 2048 // survivor spaces are usually big enough. For specjbb, however, there 2049 // are occasions when there's lots of live data in the young gen 2050 // and we end up promoting some of it. We don't have a definite 2051 // explanation for why bumping OldPLABSize helps, but the theory 2052 // is that a bigger PLAB results in retaining something like the 2053 // original allocation order after promotion, which improves mutator 2054 // locality. A minor effect may be that larger PLABs reduce the 2055 // number of PLAB allocation events during gc. The value of 8kw 2056 // was arrived at by experimenting with specjbb. 2057 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words 2058 return JNI_EINVAL; 2059 } 2060 2061 // Enable parallel GC and adaptive generation sizing 2062 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) { 2063 return JNI_EINVAL; 2064 } 2065 2066 // Encourage steady state memory management 2067 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) { 2068 return JNI_EINVAL; 2069 } 2070 2071 // This appears to improve mutator locality 2072 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 2073 return JNI_EINVAL; 2074 } 2075 2076 // Get around early Solaris scheduling bug 2077 // (affinity vs other jobs on system) 2078 // but disallow DR and offlining (5008695). 2079 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) { 2080 return JNI_EINVAL; 2081 } 2082 2083 return JNI_OK; 2084 } 2085 2086 // This must be called after ergonomics. 2087 void Arguments::set_bytecode_flags() { 2088 if (!RewriteBytecodes) { 2089 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 2090 } 2091 } 2092 2093 // Aggressive optimization flags -XX:+AggressiveOpts 2094 jint Arguments::set_aggressive_opts_flags() { 2095 #ifdef COMPILER2 2096 if (AggressiveUnboxing) { 2097 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 2098 FLAG_SET_DEFAULT(EliminateAutoBox, true); 2099 } else if (!EliminateAutoBox) { 2100 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 2101 AggressiveUnboxing = false; 2102 } 2103 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 2104 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 2105 } else if (!DoEscapeAnalysis) { 2106 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 2107 AggressiveUnboxing = false; 2108 } 2109 } 2110 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 2111 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 2112 FLAG_SET_DEFAULT(EliminateAutoBox, true); 2113 } 2114 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 2115 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 2116 } 2117 2118 // Feed the cache size setting into the JDK 2119 char buffer[1024]; 2120 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 2121 if (!add_property(buffer)) { 2122 return JNI_ENOMEM; 2123 } 2124 } 2125 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 2126 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 2127 } 2128 #endif 2129 2130 if (AggressiveOpts) { 2131 // Sample flag setting code 2132 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 2133 // FLAG_SET_DEFAULT(EliminateZeroing, true); 2134 // } 2135 } 2136 2137 return JNI_OK; 2138 } 2139 2140 //=========================================================================================================== 2141 // Parsing of java.compiler property 2142 2143 void Arguments::process_java_compiler_argument(const char* arg) { 2144 // For backwards compatibility, Djava.compiler=NONE or "" 2145 // causes us to switch to -Xint mode UNLESS -Xdebug 2146 // is also specified. 2147 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 2148 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 2149 } 2150 } 2151 2152 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2153 _sun_java_launcher = os::strdup_check_oom(launcher); 2154 } 2155 2156 bool Arguments::created_by_java_launcher() { 2157 assert(_sun_java_launcher != NULL, "property must have value"); 2158 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2159 } 2160 2161 bool Arguments::sun_java_launcher_is_altjvm() { 2162 return _sun_java_launcher_is_altjvm; 2163 } 2164 2165 //=========================================================================================================== 2166 // Parsing of main arguments 2167 2168 #if INCLUDE_JVMCI 2169 // Check consistency of jvmci vm argument settings. 2170 bool Arguments::check_jvmci_args_consistency() { 2171 return JVMCIGlobals::check_jvmci_flags_are_consistent(); 2172 } 2173 #endif //INCLUDE_JVMCI 2174 2175 // Check the consistency of vm_init_args 2176 bool Arguments::check_vm_args_consistency() { 2177 // Method for adding checks for flag consistency. 2178 // The intent is to warn the user of all possible conflicts, 2179 // before returning an error. 2180 // Note: Needs platform-dependent factoring. 2181 bool status = true; 2182 2183 if (TLABRefillWasteFraction == 0) { 2184 jio_fprintf(defaultStream::error_stream(), 2185 "TLABRefillWasteFraction should be a denominator, " 2186 "not " SIZE_FORMAT "\n", 2187 TLABRefillWasteFraction); 2188 status = false; 2189 } 2190 2191 if (PrintNMTStatistics) { 2192 #if INCLUDE_NMT 2193 if (MemTracker::tracking_level() == NMT_off) { 2194 #endif // INCLUDE_NMT 2195 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2196 PrintNMTStatistics = false; 2197 #if INCLUDE_NMT 2198 } 2199 #endif 2200 } 2201 2202 #if INCLUDE_JVMCI 2203 status = status && check_jvmci_args_consistency(); 2204 2205 if (EnableJVMCI) { 2206 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true", 2207 AddProperty, UnwriteableProperty, InternalProperty); 2208 2209 if (!ScavengeRootsInCode) { 2210 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled"); 2211 ScavengeRootsInCode = 1; 2212 } 2213 } 2214 #endif 2215 2216 // Check lower bounds of the code cache 2217 // Template Interpreter code is approximately 3X larger in debug builds. 2218 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); 2219 if (ReservedCodeCacheSize < InitialCodeCacheSize) { 2220 jio_fprintf(defaultStream::error_stream(), 2221 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", 2222 ReservedCodeCacheSize/K, InitialCodeCacheSize/K); 2223 status = false; 2224 } else if (ReservedCodeCacheSize < min_code_cache_size) { 2225 jio_fprintf(defaultStream::error_stream(), 2226 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, 2227 min_code_cache_size/K); 2228 status = false; 2229 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) { 2230 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported. 2231 jio_fprintf(defaultStream::error_stream(), 2232 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, 2233 CODE_CACHE_SIZE_LIMIT/M); 2234 status = false; 2235 } else if (NonNMethodCodeHeapSize < min_code_cache_size) { 2236 jio_fprintf(defaultStream::error_stream(), 2237 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, 2238 min_code_cache_size/K); 2239 status = false; 2240 } 2241 2242 #ifdef _LP64 2243 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { 2244 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); 2245 } 2246 #endif 2247 2248 #ifndef SUPPORT_RESERVED_STACK_AREA 2249 if (StackReservedPages != 0) { 2250 FLAG_SET_CMDLINE(intx, StackReservedPages, 0); 2251 warning("Reserved Stack Area not supported on this platform"); 2252 } 2253 #endif 2254 2255 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) { 2256 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) { 2257 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options."); 2258 } 2259 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 2260 } 2261 if (UseCompiler && is_interpreter_only()) { 2262 if (!FLAG_IS_DEFAULT(UseCompiler)) { 2263 warning("UseCompiler disabled due to -Xint."); 2264 } 2265 FLAG_SET_CMDLINE(bool, UseCompiler, false); 2266 } 2267 #ifdef COMPILER2 2268 if (PostLoopMultiversioning && !RangeCheckElimination) { 2269 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) { 2270 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled."); 2271 } 2272 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false); 2273 } 2274 if (UseCountedLoopSafepoints && LoopStripMiningIter == 0) { 2275 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) { 2276 warning("When counted loop safepoints are enabled, LoopStripMiningIter must be at least 1 (a safepoint every 1 iteration): setting it to 1"); 2277 } 2278 LoopStripMiningIter = 1; 2279 } else if (!UseCountedLoopSafepoints && LoopStripMiningIter > 0) { 2280 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) { 2281 warning("Disabling counted safepoints implies no loop strip mining: setting LoopStripMiningIter to 0"); 2282 } 2283 LoopStripMiningIter = 0; 2284 } 2285 #endif 2286 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) { 2287 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) { 2288 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n"); 2289 } 2290 } 2291 return status; 2292 } 2293 2294 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2295 const char* option_type) { 2296 if (ignore) return false; 2297 2298 const char* spacer = " "; 2299 if (option_type == NULL) { 2300 option_type = ++spacer; // Set both to the empty string. 2301 } 2302 2303 if (os::obsolete_option(option)) { 2304 jio_fprintf(defaultStream::error_stream(), 2305 "Obsolete %s%soption: %s\n", option_type, spacer, 2306 option->optionString); 2307 return false; 2308 } else { 2309 jio_fprintf(defaultStream::error_stream(), 2310 "Unrecognized %s%soption: %s\n", option_type, spacer, 2311 option->optionString); 2312 return true; 2313 } 2314 } 2315 2316 static const char* user_assertion_options[] = { 2317 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2318 }; 2319 2320 static const char* system_assertion_options[] = { 2321 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2322 }; 2323 2324 bool Arguments::parse_uintx(const char* value, 2325 uintx* uintx_arg, 2326 uintx min_size) { 2327 2328 // Check the sign first since atojulong() parses only unsigned values. 2329 bool value_is_positive = !(*value == '-'); 2330 2331 if (value_is_positive) { 2332 julong n; 2333 bool good_return = atojulong(value, &n); 2334 if (good_return) { 2335 bool above_minimum = n >= min_size; 2336 bool value_is_too_large = n > max_uintx; 2337 2338 if (above_minimum && !value_is_too_large) { 2339 *uintx_arg = n; 2340 return true; 2341 } 2342 } 2343 } 2344 return false; 2345 } 2346 2347 unsigned int addreads_count = 0; 2348 unsigned int addexports_count = 0; 2349 unsigned int addopens_count = 0; 2350 unsigned int addmods_count = 0; 2351 unsigned int patch_mod_count = 0; 2352 2353 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) { 2354 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2; 2355 char* property = AllocateHeap(prop_len, mtArguments); 2356 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value); 2357 if (ret < 0 || ret >= (int)prop_len) { 2358 FreeHeap(property); 2359 return false; 2360 } 2361 bool added = add_property(property, UnwriteableProperty, internal); 2362 FreeHeap(property); 2363 return added; 2364 } 2365 2366 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) { 2367 const unsigned int props_count_limit = 1000; 2368 const int max_digits = 3; 2369 const int extra_symbols_count = 3; // includes '.', '=', '\0' 2370 2371 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small. 2372 if (count < props_count_limit) { 2373 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count; 2374 char* property = AllocateHeap(prop_len, mtArguments); 2375 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value); 2376 if (ret < 0 || ret >= (int)prop_len) { 2377 FreeHeap(property); 2378 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value); 2379 return false; 2380 } 2381 bool added = add_property(property, UnwriteableProperty, InternalProperty); 2382 FreeHeap(property); 2383 return added; 2384 } 2385 2386 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit); 2387 return false; 2388 } 2389 2390 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2391 julong* long_arg, 2392 julong min_size, 2393 julong max_size) { 2394 if (!atojulong(s, long_arg)) return arg_unreadable; 2395 return check_memory_size(*long_arg, min_size, max_size); 2396 } 2397 2398 // Parse JavaVMInitArgs structure 2399 2400 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 2401 const JavaVMInitArgs *java_options_args, 2402 const JavaVMInitArgs *cmd_line_args) { 2403 bool patch_mod_javabase = false; 2404 2405 // Save default settings for some mode flags 2406 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2407 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2408 Arguments::_ClipInlining = ClipInlining; 2409 Arguments::_BackgroundCompilation = BackgroundCompilation; 2410 if (TieredCompilation) { 2411 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 2412 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 2413 } 2414 2415 // Setup flags for mixed which is the default 2416 set_mode_flags(_mixed); 2417 2418 // Parse args structure generated from JAVA_TOOL_OPTIONS environment 2419 // variable (if present). 2420 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR); 2421 if (result != JNI_OK) { 2422 return result; 2423 } 2424 2425 // Parse args structure generated from the command line flags. 2426 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, Flag::COMMAND_LINE); 2427 if (result != JNI_OK) { 2428 return result; 2429 } 2430 2431 // Parse args structure generated from the _JAVA_OPTIONS environment 2432 // variable (if present) (mimics classic VM) 2433 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR); 2434 if (result != JNI_OK) { 2435 return result; 2436 } 2437 2438 // We need to ensure processor and memory resources have been properly 2439 // configured - which may rely on arguments we just processed - before 2440 // doing the final argument processing. Any argument processing that 2441 // needs to know about processor and memory resources must occur after 2442 // this point. 2443 2444 os::init_container_support(); 2445 2446 // Do final processing now that all arguments have been parsed 2447 result = finalize_vm_init_args(patch_mod_javabase); 2448 if (result != JNI_OK) { 2449 return result; 2450 } 2451 2452 return JNI_OK; 2453 } 2454 2455 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2456 // represents a valid JDWP agent. is_path==true denotes that we 2457 // are dealing with -agentpath (case where name is a path), otherwise with 2458 // -agentlib 2459 bool valid_jdwp_agent(char *name, bool is_path) { 2460 char *_name; 2461 const char *_jdwp = "jdwp"; 2462 size_t _len_jdwp, _len_prefix; 2463 2464 if (is_path) { 2465 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2466 return false; 2467 } 2468 2469 _name++; // skip past last path separator 2470 _len_prefix = strlen(JNI_LIB_PREFIX); 2471 2472 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2473 return false; 2474 } 2475 2476 _name += _len_prefix; 2477 _len_jdwp = strlen(_jdwp); 2478 2479 if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2480 _name += _len_jdwp; 2481 } 2482 else { 2483 return false; 2484 } 2485 2486 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2487 return false; 2488 } 2489 2490 return true; 2491 } 2492 2493 if (strcmp(name, _jdwp) == 0) { 2494 return true; 2495 } 2496 2497 return false; 2498 } 2499 2500 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) { 2501 // --patch-module=<module>=<file>(<pathsep><file>)* 2502 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value"); 2503 // Find the equal sign between the module name and the path specification 2504 const char* module_equal = strchr(patch_mod_tail, '='); 2505 if (module_equal == NULL) { 2506 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n"); 2507 return JNI_ERR; 2508 } else { 2509 // Pick out the module name 2510 size_t module_len = module_equal - patch_mod_tail; 2511 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments); 2512 if (module_name != NULL) { 2513 memcpy(module_name, patch_mod_tail, module_len); 2514 *(module_name + module_len) = '\0'; 2515 // The path piece begins one past the module_equal sign 2516 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase); 2517 FREE_C_HEAP_ARRAY(char, module_name); 2518 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) { 2519 return JNI_ENOMEM; 2520 } 2521 } else { 2522 return JNI_ENOMEM; 2523 } 2524 } 2525 return JNI_OK; 2526 } 2527 2528 // Parse -Xss memory string parameter and convert to ThreadStackSize in K. 2529 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) { 2530 // The min and max sizes match the values in globals.hpp, but scaled 2531 // with K. The values have been chosen so that alignment with page 2532 // size doesn't change the max value, which makes the conversions 2533 // back and forth between Xss value and ThreadStackSize value easier. 2534 // The values have also been chosen to fit inside a 32-bit signed type. 2535 const julong min_ThreadStackSize = 0; 2536 const julong max_ThreadStackSize = 1 * M; 2537 2538 const julong min_size = min_ThreadStackSize * K; 2539 const julong max_size = max_ThreadStackSize * K; 2540 2541 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption"); 2542 2543 julong size = 0; 2544 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size); 2545 if (errcode != arg_in_range) { 2546 bool silent = (option == NULL); // Allow testing to silence error messages 2547 if (!silent) { 2548 jio_fprintf(defaultStream::error_stream(), 2549 "Invalid thread stack size: %s\n", option->optionString); 2550 describe_range_error(errcode); 2551 } 2552 return JNI_EINVAL; 2553 } 2554 2555 // Internally track ThreadStackSize in units of 1024 bytes. 2556 const julong size_aligned = align_up(size, K); 2557 assert(size <= size_aligned, 2558 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT, 2559 size, size_aligned); 2560 2561 const julong size_in_K = size_aligned / K; 2562 assert(size_in_K < (julong)max_intx, 2563 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT, 2564 size_in_K); 2565 2566 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow. 2567 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size()); 2568 assert(max_expanded < max_uintx && max_expanded >= size_in_K, 2569 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT, 2570 max_expanded, size_in_K); 2571 2572 *out_ThreadStackSize = (intx)size_in_K; 2573 2574 return JNI_OK; 2575 } 2576 2577 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin) { 2578 // For match_option to return remaining or value part of option string 2579 const char* tail; 2580 2581 // iterate over arguments 2582 for (int index = 0; index < args->nOptions; index++) { 2583 bool is_absolute_path = false; // for -agentpath vs -agentlib 2584 2585 const JavaVMOption* option = args->options + index; 2586 2587 if (!match_option(option, "-Djava.class.path", &tail) && 2588 !match_option(option, "-Dsun.java.command", &tail) && 2589 !match_option(option, "-Dsun.java.launcher", &tail)) { 2590 2591 // add all jvm options to the jvm_args string. This string 2592 // is used later to set the java.vm.args PerfData string constant. 2593 // the -Djava.class.path and the -Dsun.java.command options are 2594 // omitted from jvm_args string as each have their own PerfData 2595 // string constant object. 2596 build_jvm_args(option->optionString); 2597 } 2598 2599 // -verbose:[class/module/gc/jni] 2600 if (match_option(option, "-verbose", &tail)) { 2601 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2602 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load)); 2603 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload)); 2604 } else if (!strcmp(tail, ":module")) { 2605 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load)); 2606 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload)); 2607 } else if (!strcmp(tail, ":gc")) { 2608 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); 2609 } else if (!strcmp(tail, ":jni")) { 2610 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) { 2611 return JNI_EINVAL; 2612 } 2613 } 2614 // -da / -ea / -disableassertions / -enableassertions 2615 // These accept an optional class/package name separated by a colon, e.g., 2616 // -da:java.lang.Thread. 2617 } else if (match_option(option, user_assertion_options, &tail, true)) { 2618 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2619 if (*tail == '\0') { 2620 JavaAssertions::setUserClassDefault(enable); 2621 } else { 2622 assert(*tail == ':', "bogus match by match_option()"); 2623 JavaAssertions::addOption(tail + 1, enable); 2624 } 2625 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2626 } else if (match_option(option, system_assertion_options, &tail, false)) { 2627 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2628 JavaAssertions::setSystemClassDefault(enable); 2629 // -bootclasspath: 2630 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2631 jio_fprintf(defaultStream::output_stream(), 2632 "-Xbootclasspath is no longer a supported option.\n"); 2633 return JNI_EINVAL; 2634 // -bootclasspath/a: 2635 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2636 Arguments::append_sysclasspath(tail); 2637 // -bootclasspath/p: 2638 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2639 jio_fprintf(defaultStream::output_stream(), 2640 "-Xbootclasspath/p is no longer a supported option.\n"); 2641 return JNI_EINVAL; 2642 // -Xrun 2643 } else if (match_option(option, "-Xrun", &tail)) { 2644 if (tail != NULL) { 2645 const char* pos = strchr(tail, ':'); 2646 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2647 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments); 2648 jio_snprintf(name, len + 1, "%s", tail); 2649 2650 char *options = NULL; 2651 if(pos != NULL) { 2652 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2653 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2); 2654 } 2655 #if !INCLUDE_JVMTI 2656 if (strcmp(name, "jdwp") == 0) { 2657 jio_fprintf(defaultStream::error_stream(), 2658 "Debugging agents are not supported in this VM\n"); 2659 return JNI_ERR; 2660 } 2661 #endif // !INCLUDE_JVMTI 2662 add_init_library(name, options); 2663 } 2664 } else if (match_option(option, "--add-reads=", &tail)) { 2665 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) { 2666 return JNI_ENOMEM; 2667 } 2668 } else if (match_option(option, "--add-exports=", &tail)) { 2669 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) { 2670 return JNI_ENOMEM; 2671 } 2672 } else if (match_option(option, "--add-opens=", &tail)) { 2673 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) { 2674 return JNI_ENOMEM; 2675 } 2676 } else if (match_option(option, "--add-modules=", &tail)) { 2677 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) { 2678 return JNI_ENOMEM; 2679 } 2680 } else if (match_option(option, "--limit-modules=", &tail)) { 2681 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) { 2682 return JNI_ENOMEM; 2683 } 2684 } else if (match_option(option, "--module-path=", &tail)) { 2685 if (!create_property("jdk.module.path", tail, ExternalProperty)) { 2686 return JNI_ENOMEM; 2687 } 2688 } else if (match_option(option, "--upgrade-module-path=", &tail)) { 2689 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) { 2690 return JNI_ENOMEM; 2691 } 2692 } else if (match_option(option, "--patch-module=", &tail)) { 2693 // --patch-module=<module>=<file>(<pathsep><file>)* 2694 int res = process_patch_mod_option(tail, patch_mod_javabase); 2695 if (res != JNI_OK) { 2696 return res; 2697 } 2698 } else if (match_option(option, "--illegal-access=", &tail)) { 2699 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) { 2700 return JNI_ENOMEM; 2701 } 2702 // -agentlib and -agentpath 2703 } else if (match_option(option, "-agentlib:", &tail) || 2704 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2705 if(tail != NULL) { 2706 const char* pos = strchr(tail, '='); 2707 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2708 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len); 2709 name[len] = '\0'; 2710 2711 char *options = NULL; 2712 if(pos != NULL) { 2713 options = os::strdup_check_oom(pos + 1, mtArguments); 2714 } 2715 #if !INCLUDE_JVMTI 2716 if (valid_jdwp_agent(name, is_absolute_path)) { 2717 jio_fprintf(defaultStream::error_stream(), 2718 "Debugging agents are not supported in this VM\n"); 2719 return JNI_ERR; 2720 } 2721 #endif // !INCLUDE_JVMTI 2722 add_init_agent(name, options, is_absolute_path); 2723 } 2724 // -javaagent 2725 } else if (match_option(option, "-javaagent:", &tail)) { 2726 #if !INCLUDE_JVMTI 2727 jio_fprintf(defaultStream::error_stream(), 2728 "Instrumentation agents are not supported in this VM\n"); 2729 return JNI_ERR; 2730 #else 2731 if (tail != NULL) { 2732 size_t length = strlen(tail) + 1; 2733 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments); 2734 jio_snprintf(options, length, "%s", tail); 2735 add_instrument_agent("instrument", options, false); 2736 // java agents need module java.instrument 2737 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) { 2738 return JNI_ENOMEM; 2739 } 2740 } 2741 #endif // !INCLUDE_JVMTI 2742 // -Xnoclassgc 2743 } else if (match_option(option, "-Xnoclassgc")) { 2744 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) { 2745 return JNI_EINVAL; 2746 } 2747 // -Xconcgc 2748 } else if (match_option(option, "-Xconcgc")) { 2749 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) { 2750 return JNI_EINVAL; 2751 } 2752 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC"); 2753 // -Xnoconcgc 2754 } else if (match_option(option, "-Xnoconcgc")) { 2755 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) { 2756 return JNI_EINVAL; 2757 } 2758 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC"); 2759 // -Xbatch 2760 } else if (match_option(option, "-Xbatch")) { 2761 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 2762 return JNI_EINVAL; 2763 } 2764 // -Xmn for compatibility with other JVM vendors 2765 } else if (match_option(option, "-Xmn", &tail)) { 2766 julong long_initial_young_size = 0; 2767 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2768 if (errcode != arg_in_range) { 2769 jio_fprintf(defaultStream::error_stream(), 2770 "Invalid initial young generation size: %s\n", option->optionString); 2771 describe_range_error(errcode); 2772 return JNI_EINVAL; 2773 } 2774 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2775 return JNI_EINVAL; 2776 } 2777 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2778 return JNI_EINVAL; 2779 } 2780 // -Xms 2781 } else if (match_option(option, "-Xms", &tail)) { 2782 julong long_initial_heap_size = 0; 2783 // an initial heap size of 0 means automatically determine 2784 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2785 if (errcode != arg_in_range) { 2786 jio_fprintf(defaultStream::error_stream(), 2787 "Invalid initial heap size: %s\n", option->optionString); 2788 describe_range_error(errcode); 2789 return JNI_EINVAL; 2790 } 2791 set_min_heap_size((size_t)long_initial_heap_size); 2792 // Currently the minimum size and the initial heap sizes are the same. 2793 // Can be overridden with -XX:InitialHeapSize. 2794 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) { 2795 return JNI_EINVAL; 2796 } 2797 // -Xmx 2798 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2799 julong long_max_heap_size = 0; 2800 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2801 if (errcode != arg_in_range) { 2802 jio_fprintf(defaultStream::error_stream(), 2803 "Invalid maximum heap size: %s\n", option->optionString); 2804 describe_range_error(errcode); 2805 return JNI_EINVAL; 2806 } 2807 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) { 2808 return JNI_EINVAL; 2809 } 2810 // Xmaxf 2811 } else if (match_option(option, "-Xmaxf", &tail)) { 2812 char* err; 2813 int maxf = (int)(strtod(tail, &err) * 100); 2814 if (*err != '\0' || *tail == '\0') { 2815 jio_fprintf(defaultStream::error_stream(), 2816 "Bad max heap free percentage size: %s\n", 2817 option->optionString); 2818 return JNI_EINVAL; 2819 } else { 2820 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) { 2821 return JNI_EINVAL; 2822 } 2823 } 2824 // Xminf 2825 } else if (match_option(option, "-Xminf", &tail)) { 2826 char* err; 2827 int minf = (int)(strtod(tail, &err) * 100); 2828 if (*err != '\0' || *tail == '\0') { 2829 jio_fprintf(defaultStream::error_stream(), 2830 "Bad min heap free percentage size: %s\n", 2831 option->optionString); 2832 return JNI_EINVAL; 2833 } else { 2834 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) { 2835 return JNI_EINVAL; 2836 } 2837 } 2838 // -Xss 2839 } else if (match_option(option, "-Xss", &tail)) { 2840 intx value = 0; 2841 jint err = parse_xss(option, tail, &value); 2842 if (err != JNI_OK) { 2843 return err; 2844 } 2845 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != Flag::SUCCESS) { 2846 return JNI_EINVAL; 2847 } 2848 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2849 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2850 julong long_ReservedCodeCacheSize = 0; 2851 2852 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2853 if (errcode != arg_in_range) { 2854 jio_fprintf(defaultStream::error_stream(), 2855 "Invalid maximum code cache size: %s.\n", option->optionString); 2856 return JNI_EINVAL; 2857 } 2858 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) { 2859 return JNI_EINVAL; 2860 } 2861 // -green 2862 } else if (match_option(option, "-green")) { 2863 jio_fprintf(defaultStream::error_stream(), 2864 "Green threads support not available\n"); 2865 return JNI_EINVAL; 2866 // -native 2867 } else if (match_option(option, "-native")) { 2868 // HotSpot always uses native threads, ignore silently for compatibility 2869 // -Xrs 2870 } else if (match_option(option, "-Xrs")) { 2871 // Classic/EVM option, new functionality 2872 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) { 2873 return JNI_EINVAL; 2874 } 2875 // -Xprof 2876 } else if (match_option(option, "-Xprof")) { 2877 char version[256]; 2878 // Obsolete in JDK 10 2879 JDK_Version::jdk(10).to_string(version, sizeof(version)); 2880 warning("Ignoring option %s; support was removed in %s", option->optionString, version); 2881 // -Xconcurrentio 2882 } else if (match_option(option, "-Xconcurrentio")) { 2883 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) { 2884 return JNI_EINVAL; 2885 } 2886 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 2887 return JNI_EINVAL; 2888 } 2889 SafepointSynchronize::set_defer_thr_suspend_loop_count(); 2890 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) { 2891 return JNI_EINVAL; 2892 } 2893 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation 2894 return JNI_EINVAL; 2895 } 2896 2897 // -Xinternalversion 2898 } else if (match_option(option, "-Xinternalversion")) { 2899 jio_fprintf(defaultStream::output_stream(), "%s\n", 2900 VM_Version::internal_vm_info_string()); 2901 vm_exit(0); 2902 #ifndef PRODUCT 2903 // -Xprintflags 2904 } else if (match_option(option, "-Xprintflags")) { 2905 CommandLineFlags::printFlags(tty, false); 2906 vm_exit(0); 2907 #endif 2908 // -D 2909 } else if (match_option(option, "-D", &tail)) { 2910 const char* value; 2911 if (match_option(option, "-Djava.endorsed.dirs=", &value) && 2912 *value!= '\0' && strcmp(value, "\"\"") != 0) { 2913 // abort if -Djava.endorsed.dirs is set 2914 jio_fprintf(defaultStream::output_stream(), 2915 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n" 2916 "in modular form will be supported via the concept of upgradeable modules.\n", value); 2917 return JNI_EINVAL; 2918 } 2919 if (match_option(option, "-Djava.ext.dirs=", &value) && 2920 *value != '\0' && strcmp(value, "\"\"") != 0) { 2921 // abort if -Djava.ext.dirs is set 2922 jio_fprintf(defaultStream::output_stream(), 2923 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value); 2924 return JNI_EINVAL; 2925 } 2926 // Check for module related properties. They must be set using the modules 2927 // options. For example: use "--add-modules=java.sql", not 2928 // "-Djdk.module.addmods=java.sql" 2929 if (is_internal_module_property(option->optionString + 2)) { 2930 needs_module_property_warning = true; 2931 continue; 2932 } 2933 2934 if (!add_property(tail)) { 2935 return JNI_ENOMEM; 2936 } 2937 // Out of the box management support 2938 if (match_option(option, "-Dcom.sun.management", &tail)) { 2939 #if INCLUDE_MANAGEMENT 2940 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) { 2941 return JNI_EINVAL; 2942 } 2943 // management agent in module jdk.management.agent 2944 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) { 2945 return JNI_ENOMEM; 2946 } 2947 #else 2948 jio_fprintf(defaultStream::output_stream(), 2949 "-Dcom.sun.management is not supported in this VM.\n"); 2950 return JNI_ERR; 2951 #endif 2952 } 2953 // -Xint 2954 } else if (match_option(option, "-Xint")) { 2955 set_mode_flags(_int); 2956 // -Xmixed 2957 } else if (match_option(option, "-Xmixed")) { 2958 set_mode_flags(_mixed); 2959 // -Xcomp 2960 } else if (match_option(option, "-Xcomp")) { 2961 // for testing the compiler; turn off all flags that inhibit compilation 2962 set_mode_flags(_comp); 2963 // -Xshare:dump 2964 } else if (match_option(option, "-Xshare:dump")) { 2965 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) { 2966 return JNI_EINVAL; 2967 } 2968 set_mode_flags(_int); // Prevent compilation, which creates objects 2969 // -Xshare:on 2970 } else if (match_option(option, "-Xshare:on")) { 2971 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 2972 return JNI_EINVAL; 2973 } 2974 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 2975 return JNI_EINVAL; 2976 } 2977 // -Xshare:auto 2978 } else if (match_option(option, "-Xshare:auto")) { 2979 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 2980 return JNI_EINVAL; 2981 } 2982 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 2983 return JNI_EINVAL; 2984 } 2985 // -Xshare:off 2986 } else if (match_option(option, "-Xshare:off")) { 2987 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) { 2988 return JNI_EINVAL; 2989 } 2990 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 2991 return JNI_EINVAL; 2992 } 2993 // -Xverify 2994 } else if (match_option(option, "-Xverify", &tail)) { 2995 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 2996 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) { 2997 return JNI_EINVAL; 2998 } 2999 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 3000 return JNI_EINVAL; 3001 } 3002 } else if (strcmp(tail, ":remote") == 0) { 3003 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 3004 return JNI_EINVAL; 3005 } 3006 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 3007 return JNI_EINVAL; 3008 } 3009 } else if (strcmp(tail, ":none") == 0) { 3010 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 3011 return JNI_EINVAL; 3012 } 3013 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) { 3014 return JNI_EINVAL; 3015 } 3016 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 3017 return JNI_EINVAL; 3018 } 3019 // -Xdebug 3020 } else if (match_option(option, "-Xdebug")) { 3021 // note this flag has been used, then ignore 3022 set_xdebug_mode(true); 3023 // -Xnoagent 3024 } else if (match_option(option, "-Xnoagent")) { 3025 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 3026 } else if (match_option(option, "-Xloggc:", &tail)) { 3027 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename> 3028 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail); 3029 _gc_log_filename = os::strdup_check_oom(tail); 3030 } else if (match_option(option, "-Xlog", &tail)) { 3031 bool ret = false; 3032 if (strcmp(tail, ":help") == 0) { 3033 fileStream stream(defaultStream::output_stream()); 3034 LogConfiguration::print_command_line_help(&stream); 3035 vm_exit(0); 3036 } else if (strcmp(tail, ":disable") == 0) { 3037 LogConfiguration::disable_logging(); 3038 ret = true; 3039 } else if (*tail == '\0') { 3040 ret = LogConfiguration::parse_command_line_arguments(); 3041 assert(ret, "-Xlog without arguments should never fail to parse"); 3042 } else if (*tail == ':') { 3043 ret = LogConfiguration::parse_command_line_arguments(tail + 1); 3044 } 3045 if (ret == false) { 3046 jio_fprintf(defaultStream::error_stream(), 3047 "Invalid -Xlog option '-Xlog%s', see error log for details.\n", 3048 tail); 3049 return JNI_EINVAL; 3050 } 3051 // JNI hooks 3052 } else if (match_option(option, "-Xcheck", &tail)) { 3053 if (!strcmp(tail, ":jni")) { 3054 #if !INCLUDE_JNI_CHECK 3055 warning("JNI CHECKING is not supported in this VM"); 3056 #else 3057 CheckJNICalls = true; 3058 #endif // INCLUDE_JNI_CHECK 3059 } else if (is_bad_option(option, args->ignoreUnrecognized, 3060 "check")) { 3061 return JNI_EINVAL; 3062 } 3063 } else if (match_option(option, "vfprintf")) { 3064 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 3065 } else if (match_option(option, "exit")) { 3066 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 3067 } else if (match_option(option, "abort")) { 3068 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 3069 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 3070 // and the last option wins. 3071 } else if (match_option(option, "-XX:+NeverTenure")) { 3072 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) { 3073 return JNI_EINVAL; 3074 } 3075 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3076 return JNI_EINVAL; 3077 } 3078 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) { 3079 return JNI_EINVAL; 3080 } 3081 } else if (match_option(option, "-XX:+AlwaysTenure")) { 3082 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3083 return JNI_EINVAL; 3084 } 3085 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3086 return JNI_EINVAL; 3087 } 3088 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) { 3089 return JNI_EINVAL; 3090 } 3091 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 3092 uintx max_tenuring_thresh = 0; 3093 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) { 3094 jio_fprintf(defaultStream::error_stream(), 3095 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail); 3096 return JNI_EINVAL; 3097 } 3098 3099 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) { 3100 return JNI_EINVAL; 3101 } 3102 3103 if (MaxTenuringThreshold == 0) { 3104 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3105 return JNI_EINVAL; 3106 } 3107 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3108 return JNI_EINVAL; 3109 } 3110 } else { 3111 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3112 return JNI_EINVAL; 3113 } 3114 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3115 return JNI_EINVAL; 3116 } 3117 } 3118 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) { 3119 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) { 3120 return JNI_EINVAL; 3121 } 3122 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) { 3123 return JNI_EINVAL; 3124 } 3125 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) { 3126 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) { 3127 return JNI_EINVAL; 3128 } 3129 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) { 3130 return JNI_EINVAL; 3131 } 3132 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) { 3133 #if defined(DTRACE_ENABLED) 3134 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) { 3135 return JNI_EINVAL; 3136 } 3137 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) { 3138 return JNI_EINVAL; 3139 } 3140 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) { 3141 return JNI_EINVAL; 3142 } 3143 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) { 3144 return JNI_EINVAL; 3145 } 3146 #else // defined(DTRACE_ENABLED) 3147 jio_fprintf(defaultStream::error_stream(), 3148 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 3149 return JNI_EINVAL; 3150 #endif // defined(DTRACE_ENABLED) 3151 #ifdef ASSERT 3152 } else if (match_option(option, "-XX:+FullGCALot")) { 3153 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) { 3154 return JNI_EINVAL; 3155 } 3156 // disable scavenge before parallel mark-compact 3157 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 3158 return JNI_EINVAL; 3159 } 3160 #endif 3161 #if !INCLUDE_MANAGEMENT 3162 } else if (match_option(option, "-XX:+ManagementServer")) { 3163 jio_fprintf(defaultStream::error_stream(), 3164 "ManagementServer is not supported in this VM.\n"); 3165 return JNI_ERR; 3166 #endif // INCLUDE_MANAGEMENT 3167 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 3168 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have 3169 // already been handled 3170 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) && 3171 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) { 3172 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 3173 return JNI_EINVAL; 3174 } 3175 } 3176 // Unknown option 3177 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 3178 return JNI_ERR; 3179 } 3180 } 3181 3182 // PrintSharedArchiveAndExit will turn on 3183 // -Xshare:on 3184 // -Xlog:class+path=info 3185 if (PrintSharedArchiveAndExit) { 3186 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3187 return JNI_EINVAL; 3188 } 3189 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 3190 return JNI_EINVAL; 3191 } 3192 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path)); 3193 } 3194 3195 // Change the default value for flags which have different default values 3196 // when working with older JDKs. 3197 #ifdef LINUX 3198 if (JDK_Version::current().compare_major(6) <= 0 && 3199 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 3200 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 3201 } 3202 #endif // LINUX 3203 fix_appclasspath(); 3204 return JNI_OK; 3205 } 3206 3207 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) { 3208 // For java.base check for duplicate --patch-module options being specified on the command line. 3209 // This check is only required for java.base, all other duplicate module specifications 3210 // will be checked during module system initialization. The module system initialization 3211 // will throw an ExceptionInInitializerError if this situation occurs. 3212 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 3213 if (*patch_mod_javabase) { 3214 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module"); 3215 } else { 3216 *patch_mod_javabase = true; 3217 } 3218 } 3219 3220 // Create GrowableArray lazily, only if --patch-module has been specified 3221 if (_patch_mod_prefix == NULL) { 3222 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true); 3223 } 3224 3225 _patch_mod_prefix->push(new ModulePatchPath(module_name, path)); 3226 } 3227 3228 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3229 // 3230 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3231 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3232 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3233 // path is treated as the current directory. 3234 // 3235 // This causes problems with CDS, which requires that all directories specified in the classpath 3236 // must be empty. In most cases, applications do NOT want to load classes from the current 3237 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3238 // scripts compatible with CDS. 3239 void Arguments::fix_appclasspath() { 3240 if (IgnoreEmptyClassPaths) { 3241 const char separator = *os::path_separator(); 3242 const char* src = _java_class_path->value(); 3243 3244 // skip over all the leading empty paths 3245 while (*src == separator) { 3246 src ++; 3247 } 3248 3249 char* copy = os::strdup_check_oom(src, mtArguments); 3250 3251 // trim all trailing empty paths 3252 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3253 *tail = '\0'; 3254 } 3255 3256 char from[3] = {separator, separator, '\0'}; 3257 char to [2] = {separator, '\0'}; 3258 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3259 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3260 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3261 } 3262 3263 _java_class_path->set_writeable_value(copy); 3264 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3265 } 3266 } 3267 3268 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) { 3269 // check if the default lib/endorsed directory exists; if so, error 3270 char path[JVM_MAXPATHLEN]; 3271 const char* fileSep = os::file_separator(); 3272 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); 3273 3274 DIR* dir = os::opendir(path); 3275 if (dir != NULL) { 3276 jio_fprintf(defaultStream::output_stream(), 3277 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n" 3278 "in modular form will be supported via the concept of upgradeable modules.\n"); 3279 os::closedir(dir); 3280 return JNI_ERR; 3281 } 3282 3283 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); 3284 dir = os::opendir(path); 3285 if (dir != NULL) { 3286 jio_fprintf(defaultStream::output_stream(), 3287 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; " 3288 "Use -classpath instead.\n."); 3289 os::closedir(dir); 3290 return JNI_ERR; 3291 } 3292 3293 // This must be done after all arguments have been processed 3294 // and the container support has been initialized since AggressiveHeap 3295 // relies on the amount of total memory available. 3296 if (AggressiveHeap) { 3297 jint result = set_aggressive_heap_flags(); 3298 if (result != JNI_OK) { 3299 return result; 3300 } 3301 } 3302 3303 // This must be done after all arguments have been processed. 3304 // java_compiler() true means set to "NONE" or empty. 3305 if (java_compiler() && !xdebug_mode()) { 3306 // For backwards compatibility, we switch to interpreted mode if 3307 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3308 // not specified. 3309 set_mode_flags(_int); 3310 } 3311 3312 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode), 3313 // but like -Xint, leave compilation thresholds unaffected. 3314 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well. 3315 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) { 3316 set_mode_flags(_int); 3317 } 3318 3319 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3320 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3321 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3322 } 3323 3324 #if !defined(COMPILER2) && !INCLUDE_JVMCI 3325 // Don't degrade server performance for footprint 3326 if (FLAG_IS_DEFAULT(UseLargePages) && 3327 MaxHeapSize < LargePageHeapSizeThreshold) { 3328 // No need for large granularity pages w/small heaps. 3329 // Note that large pages are enabled/disabled for both the 3330 // Java heap and the code cache. 3331 FLAG_SET_DEFAULT(UseLargePages, false); 3332 } 3333 3334 #elif defined(COMPILER2) 3335 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 3336 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 3337 } 3338 #endif 3339 3340 #if !defined(COMPILER2) && !INCLUDE_JVMCI 3341 UNSUPPORTED_OPTION(ProfileInterpreter); 3342 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter)); 3343 #endif 3344 3345 #ifndef TIERED 3346 // Tiered compilation is undefined. 3347 UNSUPPORTED_OPTION(TieredCompilation); 3348 #endif 3349 3350 #if INCLUDE_JVMCI 3351 if (EnableJVMCI && 3352 !create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) { 3353 return JNI_ENOMEM; 3354 } 3355 #endif 3356 3357 if (!check_vm_args_consistency()) { 3358 return JNI_ERR; 3359 } 3360 3361 #if INCLUDE_JVMCI 3362 if (UseJVMCICompiler) { 3363 Compilation_mode = CompMode_server; 3364 } 3365 #endif 3366 3367 #if INCLUDE_CDS 3368 if (DumpSharedSpaces) { 3369 // Disable biased locking now as it interferes with the clean up of 3370 // the archived Klasses and Java string objects (at dump time only). 3371 UseBiasedLocking = false; 3372 } 3373 if (UseSharedSpaces && patch_mod_javabase) { 3374 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched."); 3375 } 3376 #endif 3377 3378 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT 3379 UNSUPPORTED_OPTION(ShowRegistersOnAssert); 3380 #endif // CAN_SHOW_REGISTERS_ON_ASSERT 3381 3382 return JNI_OK; 3383 } 3384 3385 // Helper class for controlling the lifetime of JavaVMInitArgs 3386 // objects. The contents of the JavaVMInitArgs are guaranteed to be 3387 // deleted on the destruction of the ScopedVMInitArgs object. 3388 class ScopedVMInitArgs : public StackObj { 3389 private: 3390 JavaVMInitArgs _args; 3391 char* _container_name; 3392 bool _is_set; 3393 char* _vm_options_file_arg; 3394 3395 public: 3396 ScopedVMInitArgs(const char *container_name) { 3397 _args.version = JNI_VERSION_1_2; 3398 _args.nOptions = 0; 3399 _args.options = NULL; 3400 _args.ignoreUnrecognized = false; 3401 _container_name = (char *)container_name; 3402 _is_set = false; 3403 _vm_options_file_arg = NULL; 3404 } 3405 3406 // Populates the JavaVMInitArgs object represented by this 3407 // ScopedVMInitArgs object with the arguments in options. The 3408 // allocated memory is deleted by the destructor. If this method 3409 // returns anything other than JNI_OK, then this object is in a 3410 // partially constructed state, and should be abandoned. 3411 jint set_args(GrowableArray<JavaVMOption>* options) { 3412 _is_set = true; 3413 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL( 3414 JavaVMOption, options->length(), mtArguments); 3415 if (options_arr == NULL) { 3416 return JNI_ENOMEM; 3417 } 3418 _args.options = options_arr; 3419 3420 for (int i = 0; i < options->length(); i++) { 3421 options_arr[i] = options->at(i); 3422 options_arr[i].optionString = os::strdup(options_arr[i].optionString); 3423 if (options_arr[i].optionString == NULL) { 3424 // Rely on the destructor to do cleanup. 3425 _args.nOptions = i; 3426 return JNI_ENOMEM; 3427 } 3428 } 3429 3430 _args.nOptions = options->length(); 3431 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3432 return JNI_OK; 3433 } 3434 3435 JavaVMInitArgs* get() { return &_args; } 3436 char* container_name() { return _container_name; } 3437 bool is_set() { return _is_set; } 3438 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; } 3439 char* vm_options_file_arg() { return _vm_options_file_arg; } 3440 3441 void set_vm_options_file_arg(const char *vm_options_file_arg) { 3442 if (_vm_options_file_arg != NULL) { 3443 os::free(_vm_options_file_arg); 3444 } 3445 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg); 3446 } 3447 3448 ~ScopedVMInitArgs() { 3449 if (_vm_options_file_arg != NULL) { 3450 os::free(_vm_options_file_arg); 3451 } 3452 if (_args.options == NULL) return; 3453 for (int i = 0; i < _args.nOptions; i++) { 3454 os::free(_args.options[i].optionString); 3455 } 3456 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options); 3457 } 3458 3459 // Insert options into this option list, to replace option at 3460 // vm_options_file_pos (-XX:VMOptionsFile) 3461 jint insert(const JavaVMInitArgs* args, 3462 const JavaVMInitArgs* args_to_insert, 3463 const int vm_options_file_pos) { 3464 assert(_args.options == NULL, "shouldn't be set yet"); 3465 assert(args_to_insert->nOptions != 0, "there should be args to insert"); 3466 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set"); 3467 3468 int length = args->nOptions + args_to_insert->nOptions - 1; 3469 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) 3470 GrowableArray<JavaVMOption>(length, true); // Construct new option array 3471 for (int i = 0; i < args->nOptions; i++) { 3472 if (i == vm_options_file_pos) { 3473 // insert the new options starting at the same place as the 3474 // -XX:VMOptionsFile option 3475 for (int j = 0; j < args_to_insert->nOptions; j++) { 3476 options->push(args_to_insert->options[j]); 3477 } 3478 } else { 3479 options->push(args->options[i]); 3480 } 3481 } 3482 // make into options array 3483 jint result = set_args(options); 3484 delete options; 3485 return result; 3486 } 3487 }; 3488 3489 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) { 3490 return parse_options_environment_variable("_JAVA_OPTIONS", args); 3491 } 3492 3493 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) { 3494 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args); 3495 } 3496 3497 jint Arguments::parse_options_environment_variable(const char* name, 3498 ScopedVMInitArgs* vm_args) { 3499 char *buffer = ::getenv(name); 3500 3501 // Don't check this environment variable if user has special privileges 3502 // (e.g. unix su command). 3503 if (buffer == NULL || os::have_special_privileges()) { 3504 return JNI_OK; 3505 } 3506 3507 if ((buffer = os::strdup(buffer)) == NULL) { 3508 return JNI_ENOMEM; 3509 } 3510 3511 jio_fprintf(defaultStream::error_stream(), 3512 "Picked up %s: %s\n", name, buffer); 3513 3514 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args); 3515 3516 os::free(buffer); 3517 return retcode; 3518 } 3519 3520 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) { 3521 // read file into buffer 3522 int fd = ::open(file_name, O_RDONLY); 3523 if (fd < 0) { 3524 jio_fprintf(defaultStream::error_stream(), 3525 "Could not open options file '%s'\n", 3526 file_name); 3527 return JNI_ERR; 3528 } 3529 3530 struct stat stbuf; 3531 int retcode = os::stat(file_name, &stbuf); 3532 if (retcode != 0) { 3533 jio_fprintf(defaultStream::error_stream(), 3534 "Could not stat options file '%s'\n", 3535 file_name); 3536 os::close(fd); 3537 return JNI_ERR; 3538 } 3539 3540 if (stbuf.st_size == 0) { 3541 // tell caller there is no option data and that is ok 3542 os::close(fd); 3543 return JNI_OK; 3544 } 3545 3546 // '+ 1' for NULL termination even with max bytes 3547 size_t bytes_alloc = stbuf.st_size + 1; 3548 3549 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments); 3550 if (NULL == buf) { 3551 jio_fprintf(defaultStream::error_stream(), 3552 "Could not allocate read buffer for options file parse\n"); 3553 os::close(fd); 3554 return JNI_ENOMEM; 3555 } 3556 3557 memset(buf, 0, bytes_alloc); 3558 3559 // Fill buffer 3560 // Use ::read() instead of os::read because os::read() 3561 // might do a thread state transition 3562 // and it is too early for that here 3563 3564 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc); 3565 os::close(fd); 3566 if (bytes_read < 0) { 3567 FREE_C_HEAP_ARRAY(char, buf); 3568 jio_fprintf(defaultStream::error_stream(), 3569 "Could not read options file '%s'\n", file_name); 3570 return JNI_ERR; 3571 } 3572 3573 if (bytes_read == 0) { 3574 // tell caller there is no option data and that is ok 3575 FREE_C_HEAP_ARRAY(char, buf); 3576 return JNI_OK; 3577 } 3578 3579 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args); 3580 3581 FREE_C_HEAP_ARRAY(char, buf); 3582 return retcode; 3583 } 3584 3585 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) { 3586 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array 3587 3588 // some pointers to help with parsing 3589 char *buffer_end = buffer + buf_len; 3590 char *opt_hd = buffer; 3591 char *wrt = buffer; 3592 char *rd = buffer; 3593 3594 // parse all options 3595 while (rd < buffer_end) { 3596 // skip leading white space from the input string 3597 while (rd < buffer_end && isspace(*rd)) { 3598 rd++; 3599 } 3600 3601 if (rd >= buffer_end) { 3602 break; 3603 } 3604 3605 // Remember this is where we found the head of the token. 3606 opt_hd = wrt; 3607 3608 // Tokens are strings of non white space characters separated 3609 // by one or more white spaces. 3610 while (rd < buffer_end && !isspace(*rd)) { 3611 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3612 int quote = *rd; // matching quote to look for 3613 rd++; // don't copy open quote 3614 while (rd < buffer_end && *rd != quote) { 3615 // include everything (even spaces) 3616 // up until the close quote 3617 *wrt++ = *rd++; // copy to option string 3618 } 3619 3620 if (rd < buffer_end) { 3621 rd++; // don't copy close quote 3622 } else { 3623 // did not see closing quote 3624 jio_fprintf(defaultStream::error_stream(), 3625 "Unmatched quote in %s\n", name); 3626 delete options; 3627 return JNI_ERR; 3628 } 3629 } else { 3630 *wrt++ = *rd++; // copy to option string 3631 } 3632 } 3633 3634 // steal a white space character and set it to NULL 3635 *wrt++ = '\0'; 3636 // We now have a complete token 3637 3638 JavaVMOption option; 3639 option.optionString = opt_hd; 3640 option.extraInfo = NULL; 3641 3642 options->append(option); // Fill in option 3643 3644 rd++; // Advance to next character 3645 } 3646 3647 // Fill out JavaVMInitArgs structure. 3648 jint status = vm_args->set_args(options); 3649 3650 delete options; 3651 return status; 3652 } 3653 3654 void Arguments::set_shared_spaces_flags() { 3655 if (DumpSharedSpaces) { 3656 if (FailOverToOldVerifier) { 3657 // Don't fall back to the old verifier on verification failure. If a 3658 // class fails verification with the split verifier, it might fail the 3659 // CDS runtime verifier constraint check. In that case, we don't want 3660 // to share the class. We only archive classes that pass the split verifier. 3661 FLAG_SET_DEFAULT(FailOverToOldVerifier, false); 3662 } 3663 3664 if (RequireSharedSpaces) { 3665 warning("Cannot dump shared archive while using shared archive"); 3666 } 3667 UseSharedSpaces = false; 3668 #ifdef _LP64 3669 if (!UseCompressedOops || !UseCompressedClassPointers) { 3670 vm_exit_during_initialization( 3671 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3672 } 3673 } else { 3674 if (!UseCompressedOops || !UseCompressedClassPointers) { 3675 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3676 } 3677 #endif 3678 } 3679 } 3680 3681 // Sharing support 3682 // Construct the path to the archive 3683 static char* get_shared_archive_path() { 3684 char *shared_archive_path; 3685 if (SharedArchiveFile == NULL) { 3686 char jvm_path[JVM_MAXPATHLEN]; 3687 os::jvm_path(jvm_path, sizeof(jvm_path)); 3688 char *end = strrchr(jvm_path, *os::file_separator()); 3689 if (end != NULL) *end = '\0'; 3690 size_t jvm_path_len = strlen(jvm_path); 3691 size_t file_sep_len = strlen(os::file_separator()); 3692 const size_t len = jvm_path_len + file_sep_len + 20; 3693 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments); 3694 if (shared_archive_path != NULL) { 3695 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa", 3696 jvm_path, os::file_separator()); 3697 } 3698 } else { 3699 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments); 3700 } 3701 return shared_archive_path; 3702 } 3703 3704 #ifndef PRODUCT 3705 // Determine whether LogVMOutput should be implicitly turned on. 3706 static bool use_vm_log() { 3707 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3708 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3709 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3710 PrintAssembly || TraceDeoptimization || TraceDependencies || 3711 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3712 return true; 3713 } 3714 3715 #ifdef COMPILER1 3716 if (PrintC1Statistics) { 3717 return true; 3718 } 3719 #endif // COMPILER1 3720 3721 #ifdef COMPILER2 3722 if (PrintOptoAssembly || PrintOptoStatistics) { 3723 return true; 3724 } 3725 #endif // COMPILER2 3726 3727 return false; 3728 } 3729 3730 #endif // PRODUCT 3731 3732 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) { 3733 for (int index = 0; index < args->nOptions; index++) { 3734 const JavaVMOption* option = args->options + index; 3735 const char* tail; 3736 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3737 return true; 3738 } 3739 } 3740 return false; 3741 } 3742 3743 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args, 3744 const char* vm_options_file, 3745 const int vm_options_file_pos, 3746 ScopedVMInitArgs* vm_options_file_args, 3747 ScopedVMInitArgs* args_out) { 3748 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args); 3749 if (code != JNI_OK) { 3750 return code; 3751 } 3752 3753 if (vm_options_file_args->get()->nOptions < 1) { 3754 return JNI_OK; 3755 } 3756 3757 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) { 3758 jio_fprintf(defaultStream::error_stream(), 3759 "A VM options file may not refer to a VM options file. " 3760 "Specification of '-XX:VMOptionsFile=<file-name>' in the " 3761 "options file '%s' in options container '%s' is an error.\n", 3762 vm_options_file_args->vm_options_file_arg(), 3763 vm_options_file_args->container_name()); 3764 return JNI_EINVAL; 3765 } 3766 3767 return args_out->insert(args, vm_options_file_args->get(), 3768 vm_options_file_pos); 3769 } 3770 3771 // Expand -XX:VMOptionsFile found in args_in as needed. 3772 // mod_args and args_out parameters may return values as needed. 3773 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 3774 ScopedVMInitArgs* mod_args, 3775 JavaVMInitArgs** args_out) { 3776 jint code = match_special_option_and_act(args_in, mod_args); 3777 if (code != JNI_OK) { 3778 return code; 3779 } 3780 3781 if (mod_args->is_set()) { 3782 // args_in contains -XX:VMOptionsFile and mod_args contains the 3783 // original options from args_in along with the options expanded 3784 // from the VMOptionsFile. Return a short-hand to the caller. 3785 *args_out = mod_args->get(); 3786 } else { 3787 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in 3788 } 3789 return JNI_OK; 3790 } 3791 3792 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args, 3793 ScopedVMInitArgs* args_out) { 3794 // Remaining part of option string 3795 const char* tail; 3796 ScopedVMInitArgs vm_options_file_args(args_out->container_name()); 3797 3798 for (int index = 0; index < args->nOptions; index++) { 3799 const JavaVMOption* option = args->options + index; 3800 if (ArgumentsExt::process_options(option)) { 3801 continue; 3802 } 3803 if (match_option(option, "-XX:Flags=", &tail)) { 3804 Arguments::set_jvm_flags_file(tail); 3805 continue; 3806 } 3807 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3808 if (vm_options_file_args.found_vm_options_file_arg()) { 3809 jio_fprintf(defaultStream::error_stream(), 3810 "The option '%s' is already specified in the options " 3811 "container '%s' so the specification of '%s' in the " 3812 "same options container is an error.\n", 3813 vm_options_file_args.vm_options_file_arg(), 3814 vm_options_file_args.container_name(), 3815 option->optionString); 3816 return JNI_EINVAL; 3817 } 3818 vm_options_file_args.set_vm_options_file_arg(option->optionString); 3819 // If there's a VMOptionsFile, parse that 3820 jint code = insert_vm_options_file(args, tail, index, 3821 &vm_options_file_args, args_out); 3822 if (code != JNI_OK) { 3823 return code; 3824 } 3825 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg()); 3826 if (args_out->is_set()) { 3827 // The VMOptions file inserted some options so switch 'args' 3828 // to the new set of options, and continue processing which 3829 // preserves "last option wins" semantics. 3830 args = args_out->get(); 3831 // The first option from the VMOptionsFile replaces the 3832 // current option. So we back track to process the 3833 // replacement option. 3834 index--; 3835 } 3836 continue; 3837 } 3838 if (match_option(option, "-XX:+PrintVMOptions")) { 3839 PrintVMOptions = true; 3840 continue; 3841 } 3842 if (match_option(option, "-XX:-PrintVMOptions")) { 3843 PrintVMOptions = false; 3844 continue; 3845 } 3846 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) { 3847 IgnoreUnrecognizedVMOptions = true; 3848 continue; 3849 } 3850 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) { 3851 IgnoreUnrecognizedVMOptions = false; 3852 continue; 3853 } 3854 if (match_option(option, "-XX:+PrintFlagsInitial")) { 3855 CommandLineFlags::printFlags(tty, false); 3856 vm_exit(0); 3857 } 3858 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3859 #if INCLUDE_NMT 3860 // The launcher did not setup nmt environment variable properly. 3861 if (!MemTracker::check_launcher_nmt_support(tail)) { 3862 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 3863 } 3864 3865 // Verify if nmt option is valid. 3866 if (MemTracker::verify_nmt_option()) { 3867 // Late initialization, still in single-threaded mode. 3868 if (MemTracker::tracking_level() >= NMT_summary) { 3869 MemTracker::init(); 3870 } 3871 } else { 3872 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 3873 } 3874 continue; 3875 #else 3876 jio_fprintf(defaultStream::error_stream(), 3877 "Native Memory Tracking is not supported in this VM\n"); 3878 return JNI_ERR; 3879 #endif 3880 } 3881 3882 #ifndef PRODUCT 3883 if (match_option(option, "-XX:+PrintFlagsWithComments")) { 3884 CommandLineFlags::printFlags(tty, true); 3885 vm_exit(0); 3886 } 3887 #endif 3888 3889 if (match_option(option, "-XX:+UseAppCDS")) { 3890 Flag* flag = Flag::find_flag("SharedArchiveFile", 17, true, true); 3891 if (flag->is_diagnostic()) { 3892 flag->clear_diagnostic(); 3893 } 3894 continue; 3895 } 3896 } 3897 return JNI_OK; 3898 } 3899 3900 static void print_options(const JavaVMInitArgs *args) { 3901 const char* tail; 3902 for (int index = 0; index < args->nOptions; index++) { 3903 const JavaVMOption *option = args->options + index; 3904 if (match_option(option, "-XX:", &tail)) { 3905 logOption(tail); 3906 } 3907 } 3908 } 3909 3910 bool Arguments::handle_deprecated_print_gc_flags() { 3911 if (PrintGC) { 3912 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead."); 3913 } 3914 if (PrintGCDetails) { 3915 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead."); 3916 } 3917 3918 if (_gc_log_filename != NULL) { 3919 // -Xloggc was used to specify a filename 3920 const char* gc_conf = PrintGCDetails ? "gc*" : "gc"; 3921 3922 LogTarget(Error, logging) target; 3923 LogStream errstream(target); 3924 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream); 3925 } else if (PrintGC || PrintGCDetails) { 3926 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc)); 3927 } 3928 return true; 3929 } 3930 3931 void Arguments::handle_extra_cms_flags(const char* msg) { 3932 SpecialFlag flag; 3933 const char *flag_name = "UseConcMarkSweepGC"; 3934 if (lookup_special_flag(flag_name, flag)) { 3935 handle_aliases_and_deprecation(flag_name, /* print warning */ true); 3936 warning("%s", msg); 3937 } 3938 } 3939 3940 // Parse entry point called from JNI_CreateJavaVM 3941 3942 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) { 3943 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent"); 3944 3945 // Initialize ranges, constraints and writeables 3946 CommandLineFlagRangeList::init(); 3947 CommandLineFlagConstraintList::init(); 3948 CommandLineFlagWriteableList::init(); 3949 3950 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 3951 const char* hotspotrc = ".hotspotrc"; 3952 bool settings_file_specified = false; 3953 bool needs_hotspotrc_warning = false; 3954 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3955 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'"); 3956 3957 // Pointers to current working set of containers 3958 JavaVMInitArgs* cur_cmd_args; 3959 JavaVMInitArgs* cur_java_options_args; 3960 JavaVMInitArgs* cur_java_tool_options_args; 3961 3962 // Containers for modified/expanded options 3963 ScopedVMInitArgs mod_cmd_args("cmd_line_args"); 3964 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3965 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'"); 3966 3967 3968 jint code = 3969 parse_java_tool_options_environment_variable(&initial_java_tool_options_args); 3970 if (code != JNI_OK) { 3971 return code; 3972 } 3973 3974 code = parse_java_options_environment_variable(&initial_java_options_args); 3975 if (code != JNI_OK) { 3976 return code; 3977 } 3978 3979 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(), 3980 &mod_java_tool_options_args, 3981 &cur_java_tool_options_args); 3982 if (code != JNI_OK) { 3983 return code; 3984 } 3985 3986 code = expand_vm_options_as_needed(initial_cmd_args, 3987 &mod_cmd_args, 3988 &cur_cmd_args); 3989 if (code != JNI_OK) { 3990 return code; 3991 } 3992 3993 code = expand_vm_options_as_needed(initial_java_options_args.get(), 3994 &mod_java_options_args, 3995 &cur_java_options_args); 3996 if (code != JNI_OK) { 3997 return code; 3998 } 3999 4000 const char* flags_file = Arguments::get_jvm_flags_file(); 4001 settings_file_specified = (flags_file != NULL); 4002 4003 if (IgnoreUnrecognizedVMOptions) { 4004 cur_cmd_args->ignoreUnrecognized = true; 4005 cur_java_tool_options_args->ignoreUnrecognized = true; 4006 cur_java_options_args->ignoreUnrecognized = true; 4007 } 4008 4009 // Parse specified settings file 4010 if (settings_file_specified) { 4011 if (!process_settings_file(flags_file, true, 4012 cur_cmd_args->ignoreUnrecognized)) { 4013 return JNI_EINVAL; 4014 } 4015 } else { 4016 #ifdef ASSERT 4017 // Parse default .hotspotrc settings file 4018 if (!process_settings_file(".hotspotrc", false, 4019 cur_cmd_args->ignoreUnrecognized)) { 4020 return JNI_EINVAL; 4021 } 4022 #else 4023 struct stat buf; 4024 if (os::stat(hotspotrc, &buf) == 0) { 4025 needs_hotspotrc_warning = true; 4026 } 4027 #endif 4028 } 4029 4030 if (PrintVMOptions) { 4031 print_options(cur_java_tool_options_args); 4032 print_options(cur_cmd_args); 4033 print_options(cur_java_options_args); 4034 } 4035 4036 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 4037 jint result = parse_vm_init_args(cur_java_tool_options_args, 4038 cur_java_options_args, 4039 cur_cmd_args); 4040 4041 if (result != JNI_OK) { 4042 return result; 4043 } 4044 4045 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 4046 SharedArchivePath = get_shared_archive_path(); 4047 if (SharedArchivePath == NULL) { 4048 return JNI_ENOMEM; 4049 } 4050 4051 // Set up VerifySharedSpaces 4052 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 4053 VerifySharedSpaces = true; 4054 } 4055 4056 // Delay warning until here so that we've had a chance to process 4057 // the -XX:-PrintWarnings flag 4058 if (needs_hotspotrc_warning) { 4059 warning("%s file is present but has been ignored. " 4060 "Run with -XX:Flags=%s to load the file.", 4061 hotspotrc, hotspotrc); 4062 } 4063 4064 if (needs_module_property_warning) { 4065 warning("Ignoring system property options whose names match the '-Djdk.module.*'." 4066 " names that are reserved for internal use."); 4067 } 4068 4069 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 4070 UNSUPPORTED_OPTION(UseLargePages); 4071 #endif 4072 4073 ArgumentsExt::report_unsupported_options(); 4074 4075 #ifndef PRODUCT 4076 if (TraceBytecodesAt != 0) { 4077 TraceBytecodes = true; 4078 } 4079 if (CountCompiledCalls) { 4080 if (UseCounterDecay) { 4081 warning("UseCounterDecay disabled because CountCalls is set"); 4082 UseCounterDecay = false; 4083 } 4084 } 4085 #endif // PRODUCT 4086 4087 if (ScavengeRootsInCode == 0) { 4088 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 4089 warning("Forcing ScavengeRootsInCode non-zero"); 4090 } 4091 ScavengeRootsInCode = 1; 4092 } 4093 4094 if (!handle_deprecated_print_gc_flags()) { 4095 return JNI_EINVAL; 4096 } 4097 4098 // Set object alignment values. 4099 set_object_alignment(); 4100 4101 #if !INCLUDE_CDS 4102 if (DumpSharedSpaces || RequireSharedSpaces) { 4103 jio_fprintf(defaultStream::error_stream(), 4104 "Shared spaces are not supported in this VM\n"); 4105 return JNI_ERR; 4106 } 4107 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || 4108 log_is_enabled(Info, cds)) { 4109 warning("Shared spaces are not supported in this VM"); 4110 FLAG_SET_DEFAULT(UseSharedSpaces, false); 4111 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds)); 4112 } 4113 no_shared_spaces("CDS Disabled"); 4114 #endif // INCLUDE_CDS 4115 4116 return JNI_OK; 4117 } 4118 4119 jint Arguments::apply_ergo() { 4120 // Set flags based on ergonomics. 4121 jint result = set_ergonomics_flags(); 4122 if (result != JNI_OK) return result; 4123 4124 #if INCLUDE_JVMCI 4125 set_jvmci_specific_flags(); 4126 #endif 4127 4128 set_shared_spaces_flags(); 4129 4130 if (TieredCompilation) { 4131 set_tiered_flags(); 4132 } else { 4133 int max_compilation_policy_choice = 1; 4134 #ifdef COMPILER2 4135 if (is_server_compilation_mode_vm()) { 4136 max_compilation_policy_choice = 2; 4137 } 4138 #endif 4139 // Check if the policy is valid. 4140 if (CompilationPolicyChoice >= max_compilation_policy_choice) { 4141 vm_exit_during_initialization( 4142 "Incompatible compilation policy selected", NULL); 4143 } 4144 // Scale CompileThreshold 4145 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged. 4146 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 4147 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold)); 4148 } 4149 } 4150 4151 #ifdef COMPILER2 4152 #ifndef PRODUCT 4153 if (PrintIdealGraphLevel > 0) { 4154 FLAG_SET_ERGO(bool, PrintIdealGraph, true); 4155 } 4156 #endif 4157 #endif 4158 4159 // Set heap size based on available physical memory 4160 set_heap_size(); 4161 4162 GCConfig::arguments()->initialize(); 4163 4164 // Initialize Metaspace flags and alignments 4165 Metaspace::ergo_initialize(); 4166 4167 // Set bytecode rewriting flags 4168 set_bytecode_flags(); 4169 4170 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 4171 jint code = set_aggressive_opts_flags(); 4172 if (code != JNI_OK) { 4173 return code; 4174 } 4175 4176 // Turn off biased locking for locking debug mode flags, 4177 // which are subtly different from each other but neither works with 4178 // biased locking 4179 if (UseHeavyMonitors 4180 #ifdef COMPILER1 4181 || !UseFastLocking 4182 #endif // COMPILER1 4183 #if INCLUDE_JVMCI 4184 || !JVMCIUseFastLocking 4185 #endif 4186 ) { 4187 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 4188 // flag set to true on command line; warn the user that they 4189 // can't enable biased locking here 4190 warning("Biased Locking is not supported with locking debug flags" 4191 "; ignoring UseBiasedLocking flag." ); 4192 } 4193 UseBiasedLocking = false; 4194 } 4195 4196 #ifdef CC_INTERP 4197 // Clear flags not supported on zero. 4198 FLAG_SET_DEFAULT(ProfileInterpreter, false); 4199 FLAG_SET_DEFAULT(UseBiasedLocking, false); 4200 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 4201 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 4202 #endif // CC_INTERP 4203 4204 #ifdef COMPILER2 4205 if (!EliminateLocks) { 4206 EliminateNestedLocks = false; 4207 } 4208 if (!Inline) { 4209 IncrementalInline = false; 4210 } 4211 #ifndef PRODUCT 4212 if (!IncrementalInline) { 4213 AlwaysIncrementalInline = false; 4214 } 4215 #endif 4216 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { 4217 // nothing to use the profiling, turn if off 4218 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 4219 } 4220 if (FLAG_IS_DEFAULT(LoopStripMiningIterShortLoop)) { 4221 // blind guess 4222 LoopStripMiningIterShortLoop = LoopStripMiningIter / 10; 4223 } 4224 #endif 4225 4226 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 4227 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 4228 DebugNonSafepoints = true; 4229 } 4230 4231 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 4232 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 4233 } 4234 4235 if (UseOnStackReplacement && !UseLoopCounter) { 4236 warning("On-stack-replacement requires loop counters; enabling loop counters"); 4237 FLAG_SET_DEFAULT(UseLoopCounter, true); 4238 } 4239 4240 #ifndef PRODUCT 4241 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 4242 if (use_vm_log()) { 4243 LogVMOutput = true; 4244 } 4245 } 4246 #endif // PRODUCT 4247 4248 if (PrintCommandLineFlags) { 4249 CommandLineFlags::printSetFlags(tty); 4250 } 4251 4252 // Apply CPU specific policy for the BiasedLocking 4253 if (UseBiasedLocking) { 4254 if (!VM_Version::use_biased_locking() && 4255 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 4256 UseBiasedLocking = false; 4257 } 4258 } 4259 #ifdef COMPILER2 4260 if (!UseBiasedLocking || EmitSync != 0) { 4261 UseOptoBiasInlining = false; 4262 } 4263 #endif 4264 4265 // ThreadLocalHandshakesConstraintFunc handles the constraints. 4266 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) { 4267 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled."); 4268 } else { 4269 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled."); 4270 } 4271 4272 return JNI_OK; 4273 } 4274 4275 jint Arguments::adjust_after_os() { 4276 if (UseNUMA) { 4277 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) { 4278 FLAG_SET_ERGO(bool, UseNUMA, false); 4279 } else if (UseParallelGC || UseParallelOldGC) { 4280 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4281 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4282 } 4283 } 4284 // UseNUMAInterleaving is set to ON for all collectors and 4285 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4286 // such as the parallel collector for Linux and Solaris will 4287 // interleave old gen and survivor spaces on top of NUMA 4288 // allocation policy for the eden space. 4289 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4290 // all platforms and ParallelGC on Windows will interleave all 4291 // of the heap spaces across NUMA nodes. 4292 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4293 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4294 } 4295 } 4296 return JNI_OK; 4297 } 4298 4299 int Arguments::PropertyList_count(SystemProperty* pl) { 4300 int count = 0; 4301 while(pl != NULL) { 4302 count++; 4303 pl = pl->next(); 4304 } 4305 return count; 4306 } 4307 4308 // Return the number of readable properties. 4309 int Arguments::PropertyList_readable_count(SystemProperty* pl) { 4310 int count = 0; 4311 while(pl != NULL) { 4312 if (pl->is_readable()) { 4313 count++; 4314 } 4315 pl = pl->next(); 4316 } 4317 return count; 4318 } 4319 4320 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4321 assert(key != NULL, "just checking"); 4322 SystemProperty* prop; 4323 for (prop = pl; prop != NULL; prop = prop->next()) { 4324 if (strcmp(key, prop->key()) == 0) return prop->value(); 4325 } 4326 return NULL; 4327 } 4328 4329 // Return the value of the requested property provided that it is a readable property. 4330 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) { 4331 assert(key != NULL, "just checking"); 4332 SystemProperty* prop; 4333 // Return the property value if the keys match and the property is not internal or 4334 // it's the special internal property "jdk.boot.class.path.append". 4335 for (prop = pl; prop != NULL; prop = prop->next()) { 4336 if (strcmp(key, prop->key()) == 0) { 4337 if (!prop->internal()) { 4338 return prop->value(); 4339 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) { 4340 return prop->value(); 4341 } else { 4342 // Property is internal and not jdk.boot.class.path.append so return NULL. 4343 return NULL; 4344 } 4345 } 4346 } 4347 return NULL; 4348 } 4349 4350 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4351 int count = 0; 4352 const char* ret_val = NULL; 4353 4354 while(pl != NULL) { 4355 if(count >= index) { 4356 ret_val = pl->key(); 4357 break; 4358 } 4359 count++; 4360 pl = pl->next(); 4361 } 4362 4363 return ret_val; 4364 } 4365 4366 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4367 int count = 0; 4368 char* ret_val = NULL; 4369 4370 while(pl != NULL) { 4371 if(count >= index) { 4372 ret_val = pl->value(); 4373 break; 4374 } 4375 count++; 4376 pl = pl->next(); 4377 } 4378 4379 return ret_val; 4380 } 4381 4382 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4383 SystemProperty* p = *plist; 4384 if (p == NULL) { 4385 *plist = new_p; 4386 } else { 4387 while (p->next() != NULL) { 4388 p = p->next(); 4389 } 4390 p->set_next(new_p); 4391 } 4392 } 4393 4394 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v, 4395 bool writeable, bool internal) { 4396 if (plist == NULL) 4397 return; 4398 4399 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal); 4400 PropertyList_add(plist, new_p); 4401 } 4402 4403 void Arguments::PropertyList_add(SystemProperty *element) { 4404 PropertyList_add(&_system_properties, element); 4405 } 4406 4407 // This add maintains unique property key in the list. 4408 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, 4409 PropertyAppendable append, PropertyWriteable writeable, 4410 PropertyInternal internal) { 4411 if (plist == NULL) 4412 return; 4413 4414 // If property key exist then update with new value. 4415 SystemProperty* prop; 4416 for (prop = *plist; prop != NULL; prop = prop->next()) { 4417 if (strcmp(k, prop->key()) == 0) { 4418 if (append == AppendProperty) { 4419 prop->append_value(v); 4420 } else { 4421 prop->set_value(v); 4422 } 4423 return; 4424 } 4425 } 4426 4427 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty); 4428 } 4429 4430 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4431 // Returns true if all of the source pointed by src has been copied over to 4432 // the destination buffer pointed by buf. Otherwise, returns false. 4433 // Notes: 4434 // 1. If the length (buflen) of the destination buffer excluding the 4435 // NULL terminator character is not long enough for holding the expanded 4436 // pid characters, it also returns false instead of returning the partially 4437 // expanded one. 4438 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4439 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4440 char* buf, size_t buflen) { 4441 const char* p = src; 4442 char* b = buf; 4443 const char* src_end = &src[srclen]; 4444 char* buf_end = &buf[buflen - 1]; 4445 4446 while (p < src_end && b < buf_end) { 4447 if (*p == '%') { 4448 switch (*(++p)) { 4449 case '%': // "%%" ==> "%" 4450 *b++ = *p++; 4451 break; 4452 case 'p': { // "%p" ==> current process id 4453 // buf_end points to the character before the last character so 4454 // that we could write '\0' to the end of the buffer. 4455 size_t buf_sz = buf_end - b + 1; 4456 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4457 4458 // if jio_snprintf fails or the buffer is not long enough to hold 4459 // the expanded pid, returns false. 4460 if (ret < 0 || ret >= (int)buf_sz) { 4461 return false; 4462 } else { 4463 b += ret; 4464 assert(*b == '\0', "fail in copy_expand_pid"); 4465 if (p == src_end && b == buf_end + 1) { 4466 // reach the end of the buffer. 4467 return true; 4468 } 4469 } 4470 p++; 4471 break; 4472 } 4473 default : 4474 *b++ = '%'; 4475 } 4476 } else { 4477 *b++ = *p++; 4478 } 4479 } 4480 *b = '\0'; 4481 return (p == src_end); // return false if not all of the source was copied 4482 }