1 /* 2 * Copyright (c) 1997, 2015, 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 "classfile/classLoader.hpp" 27 #include "classfile/javaAssertions.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/symbolTable.hpp" 30 #include "code/codeCacheExtensions.hpp" 31 #include "gc/shared/cardTableRS.hpp" 32 #include "gc/shared/genCollectedHeap.hpp" 33 #include "gc/shared/referenceProcessor.hpp" 34 #include "gc/shared/taskqueue.hpp" 35 #include "memory/allocation.inline.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "prims/jvmtiExport.hpp" 39 #include "runtime/arguments.hpp" 40 #include "runtime/arguments_ext.hpp" 41 #include "runtime/commandLineFlagConstraintList.hpp" 42 #include "runtime/commandLineFlagRangeList.hpp" 43 #include "runtime/globals.hpp" 44 #include "runtime/globals_extension.hpp" 45 #include "runtime/java.hpp" 46 #include "runtime/os.hpp" 47 #include "runtime/vm_version.hpp" 48 #include "services/management.hpp" 49 #include "services/memTracker.hpp" 50 #include "utilities/defaultStream.hpp" 51 #include "utilities/macros.hpp" 52 #include "utilities/stringUtils.hpp" 53 #if INCLUDE_ALL_GCS 54 #include "gc/cms/compactibleFreeListSpace.hpp" 55 #include "gc/g1/g1CollectedHeap.inline.hpp" 56 #include "gc/parallel/parallelScavengeHeap.hpp" 57 #endif // INCLUDE_ALL_GCS 58 59 // Note: This is a special bug reporting site for the JVM 60 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp" 61 #define DEFAULT_JAVA_LAUNCHER "generic" 62 63 #define UNSUPPORTED_GC_OPTION(gc) \ 64 do { \ 65 if (gc) { \ 66 if (FLAG_IS_CMDLINE(gc)) { \ 67 warning(#gc " is not supported in this VM. Using Serial GC."); \ 68 } \ 69 FLAG_SET_DEFAULT(gc, false); \ 70 } \ 71 } while(0) 72 73 char** Arguments::_jvm_flags_array = NULL; 74 int Arguments::_num_jvm_flags = 0; 75 char** Arguments::_jvm_args_array = NULL; 76 int Arguments::_num_jvm_args = 0; 77 char* Arguments::_java_command = NULL; 78 SystemProperty* Arguments::_system_properties = NULL; 79 const char* Arguments::_gc_log_filename = NULL; 80 bool Arguments::_has_profile = false; 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::_sun_boot_class_path = NULL; 114 115 char* Arguments::_ext_dirs = NULL; 116 117 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining 118 // part of the option string. 119 static bool match_option(const JavaVMOption *option, const char* name, 120 const char** tail) { 121 size_t len = strlen(name); 122 if (strncmp(option->optionString, name, len) == 0) { 123 *tail = option->optionString + len; 124 return true; 125 } else { 126 return false; 127 } 128 } 129 130 // Check if 'option' matches 'name'. No "tail" is allowed. 131 static bool match_option(const JavaVMOption *option, const char* name) { 132 const char* tail = NULL; 133 bool result = match_option(option, name, &tail); 134 if (tail != NULL && *tail == '\0') { 135 return result; 136 } else { 137 return false; 138 } 139 } 140 141 // Return true if any of the strings in null-terminated array 'names' matches. 142 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 143 // the option must match exactly. 144 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 145 bool tail_allowed) { 146 for (/* empty */; *names != NULL; ++names) { 147 if (match_option(option, *names, tail)) { 148 if (**tail == '\0' || tail_allowed && **tail == ':') { 149 return true; 150 } 151 } 152 } 153 return false; 154 } 155 156 static void logOption(const char* opt) { 157 if (PrintVMOptions) { 158 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 159 } 160 } 161 162 // Process java launcher properties. 163 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 164 // See if sun.java.launcher, sun.java.launcher.is_altjvm or 165 // sun.java.launcher.pid is defined. 166 // Must do this before setting up other system properties, 167 // as some of them may depend on launcher type. 168 for (int index = 0; index < args->nOptions; index++) { 169 const JavaVMOption* option = args->options + index; 170 const char* tail; 171 172 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 173 process_java_launcher_argument(tail, option->extraInfo); 174 continue; 175 } 176 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { 177 if (strcmp(tail, "true") == 0) { 178 _sun_java_launcher_is_altjvm = true; 179 } 180 continue; 181 } 182 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 183 _sun_java_launcher_pid = atoi(tail); 184 continue; 185 } 186 } 187 } 188 189 // Initialize system properties key and value. 190 void Arguments::init_system_properties() { 191 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 192 "Java Virtual Machine Specification", false)); 193 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 194 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 195 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 196 197 // Following are JVMTI agent writable properties. 198 // Properties values are set to NULL and they are 199 // os specific they are initialized in os::init_system_properties_values(). 200 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 201 _java_library_path = new SystemProperty("java.library.path", NULL, true); 202 _java_home = new SystemProperty("java.home", NULL, true); 203 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); 204 205 _java_class_path = new SystemProperty("java.class.path", "", true); 206 207 // Add to System Property list. 208 PropertyList_add(&_system_properties, _sun_boot_library_path); 209 PropertyList_add(&_system_properties, _java_library_path); 210 PropertyList_add(&_system_properties, _java_home); 211 PropertyList_add(&_system_properties, _java_class_path); 212 PropertyList_add(&_system_properties, _sun_boot_class_path); 213 214 // Set OS specific system properties values 215 os::init_system_properties_values(); 216 } 217 218 // Update/Initialize System properties after JDK version number is known 219 void Arguments::init_version_specific_system_properties() { 220 enum { bufsz = 16 }; 221 char buffer[bufsz]; 222 const char* spec_vendor = "Oracle Corporation"; 223 uint32_t spec_version = JDK_Version::current().major_version(); 224 225 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version); 226 227 PropertyList_add(&_system_properties, 228 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); 229 PropertyList_add(&_system_properties, 230 new SystemProperty("java.vm.specification.version", buffer, false)); 231 PropertyList_add(&_system_properties, 232 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 233 } 234 235 /* 236 * -XX argument processing: 237 * 238 * -XX arguments are defined in several places, such as: 239 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp. 240 * -XX arguments are parsed in parse_argument(). 241 * -XX argument bounds checking is done in check_vm_args_consistency(). 242 * 243 * Over time -XX arguments may change. There are mechanisms to handle common cases: 244 * 245 * ALIASED: An option that is simply another name for another option. This is often 246 * part of the process of deprecating a flag, but not all aliases need 247 * to be deprecated. 248 * 249 * Create an alias for an option by adding the old and new option names to the 250 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc). 251 * 252 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that 253 * support may be removed in the future. Both regular and aliased options may be 254 * deprecated. 255 * 256 * Add a deprecation warning for an option (or alias) by adding an entry in the 257 * "special_jvm_flags" table and setting the "deprecated_in" field. 258 * Often an option "deprecated" in one major release will 259 * be made "obsolete" in the next. In this case the entry should also have it's 260 * "obsolete_in" field set. 261 * 262 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted 263 * on the command line. A warning is printed to let the user know that option might not 264 * be accepted in the future. 265 * 266 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags" 267 * table and setting the "obsolete_in" field. 268 * 269 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal 270 * to the current JDK version. The system will flatly refuse to admit the existence of 271 * the flag. This allows a flag to die automatically over JDK releases. 272 * 273 * Note that manual cleanup of expired options should be done at major JDK version upgrades: 274 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables. 275 * - Newly obsolete or expired deprecated options should have their global variable 276 * definitions removed (from globals.hpp, etc) and related implementations removed. 277 * 278 * Recommended approach for removing options: 279 * 280 * To remove options commonly used by customers (e.g. product, commercial -XX options), use 281 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns. 282 * 283 * To remove internal options (e.g. diagnostic, experimental, develop options), use 284 * a 2-step model adding major release numbers to the obsolete and expire columns. 285 * 286 * To change the name of an option, use the alias table as well as a 2-step 287 * model adding major release numbers to the deprecate and expire columns. 288 * Think twice about aliasing commonly used customer options. 289 * 290 * There are times when it is appropriate to leave a future release number as undefined. 291 * 292 * Tests: Aliases should be tested in VMAliasOptions.java. 293 * Deprecated options should be tested in VMDeprecatedOptions.java. 294 */ 295 296 // Obsolete or deprecated -XX flag. 297 typedef struct { 298 const char* name; 299 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined"). 300 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined"). 301 JDK_Version expired_in; // When the option expires (or "undefined"). 302 } SpecialFlag; 303 304 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The 305 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both. 306 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on 307 // the command-line as usual, but will issue a warning. 308 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on 309 // the command-line, while issuing a warning and ignoring the flag value. 310 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the 311 // existence of the flag. 312 // 313 // MANUAL CLEANUP ON JDK VERSION UPDATES: 314 // This table ensures that the handling of options will update automatically when the JDK 315 // version is incremented, but the source code needs to be cleanup up manually: 316 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals" 317 // variable should be removed, as well as users of the variable. 318 // - As "deprecated" options age into "obsolete" options, move the entry into the 319 // "Obsolete Flags" section of the table. 320 // - All expired options should be removed from the table. 321 static SpecialFlag const special_jvm_flags[] = { 322 // -------------- Deprecated Flags -------------- 323 // --- Non-alias flags - sorted by obsolete_in then expired_in: 324 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 325 { "UseParNewGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 326 327 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in: 328 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 329 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 330 { "CMSMarkStackSizeMax", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 331 { "CMSMarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 332 { "G1MarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 333 { "ParallelMarkingThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 334 { "ParallelCMSThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 335 336 // -------------- Obsolete Flags - sorted by expired_in -------------- 337 { "UseOldInlining", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 338 { "SafepointPollOffset", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 339 { "UseBoundThreads", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 340 { "DefaultThreadPriority", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 341 { "NoYieldsInMicrolock", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 342 { "BackEdgeThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 343 { "UseNewReflection", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 344 { "ReflectionWrapResolutionErrors",JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 345 { "VerifyReflectionBytecodes", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 346 { "AutoShutdownNMT", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 347 { "NmethodSweepFraction", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 348 { "NmethodSweepCheckInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 349 { "CodeCacheMinimumFreeSpace", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 350 #ifndef ZERO 351 { "UseFastAccessorMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 352 { "UseFastEmptyMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 353 #endif // ZERO 354 { "UseCompilerSafepoints", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 355 { "AdaptiveSizePausePolicy", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 356 { "ParallelGCRetainPLAB", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 357 { "ThreadSafetyMargin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 358 { "LazyBootClassLoader", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 359 { "StarvationMonitorInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 360 { "PreInflateSpin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 361 362 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS 363 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() }, 364 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) }, 365 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) }, 366 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) }, 367 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 368 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 369 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() }, 370 #endif 371 372 { NULL, JDK_Version(0), JDK_Version(0) } 373 }; 374 375 // Flags that are aliases for other flags. 376 typedef struct { 377 const char* alias_name; 378 const char* real_name; 379 } AliasedFlag; 380 381 static AliasedFlag const aliased_jvm_flags[] = { 382 { "DefaultMaxRAMFraction", "MaxRAMFraction" }, 383 { "CMSMarkStackSizeMax", "MarkStackSizeMax" }, 384 { "CMSMarkStackSize", "MarkStackSize" }, 385 { "G1MarkStackSize", "MarkStackSize" }, 386 { "ParallelMarkingThreads", "ConcGCThreads" }, 387 { "ParallelCMSThreads", "ConcGCThreads" }, 388 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" }, 389 { NULL, NULL} 390 }; 391 392 // Return true if "v" is less than "other", where "other" may be "undefined". 393 static bool version_less_than(JDK_Version v, JDK_Version other) { 394 assert(!v.is_undefined(), "must be defined"); 395 if (!other.is_undefined() && v.compare(other) >= 0) { 396 return false; 397 } else { 398 return true; 399 } 400 } 401 402 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) { 403 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 404 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 405 flag = special_jvm_flags[i]; 406 return true; 407 } 408 } 409 return false; 410 } 411 412 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) { 413 assert(version != NULL, "Must provide a version buffer"); 414 SpecialFlag flag; 415 if (lookup_special_flag(flag_name, flag)) { 416 if (!flag.obsolete_in.is_undefined()) { 417 if (version_less_than(JDK_Version::current(), flag.expired_in)) { 418 *version = flag.obsolete_in; 419 return true; 420 } 421 } 422 } 423 return false; 424 } 425 426 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) { 427 assert(version != NULL, "Must provide a version buffer"); 428 SpecialFlag flag; 429 if (lookup_special_flag(flag_name, flag)) { 430 if (!flag.deprecated_in.is_undefined()) { 431 if (version_less_than(JDK_Version::current(), flag.obsolete_in) && 432 version_less_than(JDK_Version::current(), flag.expired_in)) { 433 *version = flag.deprecated_in; 434 return 1; 435 } else { 436 return -1; 437 } 438 } 439 } 440 return 0; 441 } 442 443 const char* Arguments::real_flag_name(const char *flag_name) { 444 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) { 445 const AliasedFlag& flag_status = aliased_jvm_flags[i]; 446 if (strcmp(flag_status.alias_name, flag_name) == 0) { 447 return flag_status.real_name; 448 } 449 } 450 return flag_name; 451 } 452 453 #ifndef PRODUCT 454 static bool lookup_special_flag(const char *flag_name, size_t skip_index) { 455 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 456 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 457 return true; 458 } 459 } 460 return false; 461 } 462 463 static bool verify_special_jvm_flags() { 464 bool success = true; 465 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 466 const SpecialFlag& flag = special_jvm_flags[i]; 467 if (lookup_special_flag(flag.name, i)) { 468 warning("Duplicate special flag declaration \"%s\"", flag.name); 469 success = false; 470 } 471 if (flag.deprecated_in.is_undefined() && 472 flag.obsolete_in.is_undefined()) { 473 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name); 474 success = false; 475 } 476 477 if (!flag.deprecated_in.is_undefined()) { 478 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) { 479 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name); 480 success = false; 481 } 482 483 if (!version_less_than(flag.deprecated_in, flag.expired_in)) { 484 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name); 485 success = false; 486 } 487 } 488 489 if (!flag.obsolete_in.is_undefined()) { 490 if (!version_less_than(flag.obsolete_in, flag.expired_in)) { 491 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name); 492 success = false; 493 } 494 495 // if flag has become obsolete it should not have a "globals" flag defined anymore. 496 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 497 if (Flag::find_flag(flag.name) != NULL) { 498 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name); 499 success = false; 500 } 501 } 502 } 503 504 if (!flag.expired_in.is_undefined()) { 505 // if flag has become expired it should not have a "globals" flag defined anymore. 506 if (!version_less_than(JDK_Version::current(), flag.expired_in)) { 507 if (Flag::find_flag(flag.name) != NULL) { 508 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name); 509 success = false; 510 } 511 } 512 } 513 514 } 515 return success; 516 } 517 #endif 518 519 // Constructs the system class path (aka boot class path) from the following 520 // components, in order: 521 // 522 // prefix // from -Xbootclasspath/p:... 523 // base // from os::get_system_properties() or -Xbootclasspath= 524 // suffix // from -Xbootclasspath/a:... 525 // 526 // This could be AllStatic, but it isn't needed after argument processing is 527 // complete. 528 class SysClassPath: public StackObj { 529 public: 530 SysClassPath(const char* base); 531 ~SysClassPath(); 532 533 inline void set_base(const char* base); 534 inline void add_prefix(const char* prefix); 535 inline void add_suffix_to_prefix(const char* suffix); 536 inline void add_suffix(const char* suffix); 537 inline void reset_path(const char* base); 538 539 inline const char* get_base() const { return _items[_scp_base]; } 540 inline const char* get_prefix() const { return _items[_scp_prefix]; } 541 inline const char* get_suffix() const { return _items[_scp_suffix]; } 542 543 // Combine all the components into a single c-heap-allocated string; caller 544 // must free the string if/when no longer needed. 545 char* combined_path(); 546 547 private: 548 // Utility routines. 549 static char* add_to_path(const char* path, const char* str, bool prepend); 550 static char* add_jars_to_path(char* path, const char* directory); 551 552 inline void reset_item_at(int index); 553 554 // Array indices for the items that make up the sysclasspath. All except the 555 // base are allocated in the C heap and freed by this class. 556 enum { 557 _scp_prefix, // from -Xbootclasspath/p:... 558 _scp_base, // the default sysclasspath 559 _scp_suffix, // from -Xbootclasspath/a:... 560 _scp_nitems // the number of items, must be last. 561 }; 562 563 const char* _items[_scp_nitems]; 564 }; 565 566 SysClassPath::SysClassPath(const char* base) { 567 memset(_items, 0, sizeof(_items)); 568 _items[_scp_base] = base; 569 } 570 571 SysClassPath::~SysClassPath() { 572 // Free everything except the base. 573 for (int i = 0; i < _scp_nitems; ++i) { 574 if (i != _scp_base) reset_item_at(i); 575 } 576 } 577 578 inline void SysClassPath::set_base(const char* base) { 579 _items[_scp_base] = base; 580 } 581 582 inline void SysClassPath::add_prefix(const char* prefix) { 583 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); 584 } 585 586 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { 587 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); 588 } 589 590 inline void SysClassPath::add_suffix(const char* suffix) { 591 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); 592 } 593 594 inline void SysClassPath::reset_item_at(int index) { 595 assert(index < _scp_nitems && index != _scp_base, "just checking"); 596 if (_items[index] != NULL) { 597 FREE_C_HEAP_ARRAY(char, _items[index]); 598 _items[index] = NULL; 599 } 600 } 601 602 inline void SysClassPath::reset_path(const char* base) { 603 // Clear the prefix and suffix. 604 reset_item_at(_scp_prefix); 605 reset_item_at(_scp_suffix); 606 set_base(base); 607 } 608 609 //------------------------------------------------------------------------------ 610 611 612 // Combine the bootclasspath elements, some of which may be null, into a single 613 // c-heap-allocated string. 614 char* SysClassPath::combined_path() { 615 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); 616 617 size_t lengths[_scp_nitems]; 618 size_t total_len = 0; 619 620 const char separator = *os::path_separator(); 621 622 // Get the lengths. 623 int i; 624 for (i = 0; i < _scp_nitems; ++i) { 625 if (_items[i] != NULL) { 626 lengths[i] = strlen(_items[i]); 627 // Include space for the separator char (or a NULL for the last item). 628 total_len += lengths[i] + 1; 629 } 630 } 631 assert(total_len > 0, "empty sysclasspath not allowed"); 632 633 // Copy the _items to a single string. 634 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal); 635 char* cp_tmp = cp; 636 for (i = 0; i < _scp_nitems; ++i) { 637 if (_items[i] != NULL) { 638 memcpy(cp_tmp, _items[i], lengths[i]); 639 cp_tmp += lengths[i]; 640 *cp_tmp++ = separator; 641 } 642 } 643 *--cp_tmp = '\0'; // Replace the extra separator. 644 return cp; 645 } 646 647 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 648 char* 649 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { 650 char *cp; 651 652 assert(str != NULL, "just checking"); 653 if (path == NULL) { 654 size_t len = strlen(str) + 1; 655 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); 656 memcpy(cp, str, len); // copy the trailing null 657 } else { 658 const char separator = *os::path_separator(); 659 size_t old_len = strlen(path); 660 size_t str_len = strlen(str); 661 size_t len = old_len + str_len + 2; 662 663 if (prepend) { 664 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); 665 char* cp_tmp = cp; 666 memcpy(cp_tmp, str, str_len); 667 cp_tmp += str_len; 668 *cp_tmp = separator; 669 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null 670 FREE_C_HEAP_ARRAY(char, path); 671 } else { 672 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal); 673 char* cp_tmp = cp + old_len; 674 *cp_tmp = separator; 675 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null 676 } 677 } 678 return cp; 679 } 680 681 // Scan the directory and append any jar or zip files found to path. 682 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 683 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { 684 DIR* dir = os::opendir(directory); 685 if (dir == NULL) return path; 686 687 char dir_sep[2] = { '\0', '\0' }; 688 size_t directory_len = strlen(directory); 689 const char fileSep = *os::file_separator(); 690 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; 691 692 /* Scan the directory for jars/zips, appending them to path. */ 693 struct dirent *entry; 694 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal); 695 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 696 const char* name = entry->d_name; 697 const char* ext = name + strlen(name) - 4; 698 bool isJarOrZip = ext > name && 699 (os::file_name_strcmp(ext, ".jar") == 0 || 700 os::file_name_strcmp(ext, ".zip") == 0); 701 if (isJarOrZip) { 702 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal); 703 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); 704 path = add_to_path(path, jarpath, false); 705 FREE_C_HEAP_ARRAY(char, jarpath); 706 } 707 } 708 FREE_C_HEAP_ARRAY(char, dbuf); 709 os::closedir(dir); 710 return path; 711 } 712 713 // Parses a memory size specification string. 714 static bool atomull(const char *s, julong* result) { 715 julong n = 0; 716 int args_read = 0; 717 bool is_hex = false; 718 // Skip leading 0[xX] for hexadecimal 719 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) { 720 s += 2; 721 is_hex = true; 722 args_read = sscanf(s, JULONG_FORMAT_X, &n); 723 } else { 724 args_read = sscanf(s, JULONG_FORMAT, &n); 725 } 726 if (args_read != 1) { 727 return false; 728 } 729 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) { 730 s++; 731 } 732 // 4705540: illegal if more characters are found after the first non-digit 733 if (strlen(s) > 1) { 734 return false; 735 } 736 switch (*s) { 737 case 'T': case 't': 738 *result = n * G * K; 739 // Check for overflow. 740 if (*result/((julong)G * K) != n) return false; 741 return true; 742 case 'G': case 'g': 743 *result = n * G; 744 if (*result/G != n) return false; 745 return true; 746 case 'M': case 'm': 747 *result = n * M; 748 if (*result/M != n) return false; 749 return true; 750 case 'K': case 'k': 751 *result = n * K; 752 if (*result/K != n) return false; 753 return true; 754 case '\0': 755 *result = n; 756 return true; 757 default: 758 return false; 759 } 760 } 761 762 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { 763 if (size < min_size) return arg_too_small; 764 // Check that size will fit in a size_t (only relevant on 32-bit) 765 if (size > max_uintx) return arg_too_big; 766 return arg_in_range; 767 } 768 769 // Describe an argument out of range error 770 void Arguments::describe_range_error(ArgsRange errcode) { 771 switch(errcode) { 772 case arg_too_big: 773 jio_fprintf(defaultStream::error_stream(), 774 "The specified size exceeds the maximum " 775 "representable size.\n"); 776 break; 777 case arg_too_small: 778 case arg_unreadable: 779 case arg_in_range: 780 // do nothing for now 781 break; 782 default: 783 ShouldNotReachHere(); 784 } 785 } 786 787 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) { 788 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) { 789 return true; 790 } else { 791 return false; 792 } 793 } 794 795 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) { 796 double v; 797 if (sscanf(value, "%lf", &v) != 1) { 798 return false; 799 } 800 801 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) { 802 return true; 803 } 804 return false; 805 } 806 807 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) { 808 julong v; 809 int int_v; 810 intx intx_v; 811 bool is_neg = false; 812 // Check the sign first since atomull() parses only unsigned values. 813 if (*value == '-') { 814 if ((CommandLineFlags::intxAt(name, &intx_v) != Flag::SUCCESS) && (CommandLineFlags::intAt(name, &int_v) != Flag::SUCCESS)) { 815 return false; 816 } 817 value++; 818 is_neg = true; 819 } 820 if (!atomull(value, &v)) { 821 return false; 822 } 823 int_v = (int) v; 824 if (is_neg) { 825 int_v = -int_v; 826 } 827 if (CommandLineFlags::intAtPut(name, &int_v, origin) == Flag::SUCCESS) { 828 return true; 829 } 830 uint uint_v = (uint) v; 831 if (!is_neg && CommandLineFlags::uintAtPut(name, &uint_v, origin) == Flag::SUCCESS) { 832 return true; 833 } 834 intx_v = (intx) v; 835 if (is_neg) { 836 intx_v = -intx_v; 837 } 838 if (CommandLineFlags::intxAtPut(name, &intx_v, origin) == Flag::SUCCESS) { 839 return true; 840 } 841 uintx uintx_v = (uintx) v; 842 if (!is_neg && (CommandLineFlags::uintxAtPut(name, &uintx_v, origin) == Flag::SUCCESS)) { 843 return true; 844 } 845 uint64_t uint64_t_v = (uint64_t) v; 846 if (!is_neg && (CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin) == Flag::SUCCESS)) { 847 return true; 848 } 849 size_t size_t_v = (size_t) v; 850 if (!is_neg && (CommandLineFlags::size_tAtPut(name, &size_t_v, origin) == Flag::SUCCESS)) { 851 return true; 852 } 853 return false; 854 } 855 856 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) { 857 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false; 858 // Contract: CommandLineFlags always returns a pointer that needs freeing. 859 FREE_C_HEAP_ARRAY(char, value); 860 return true; 861 } 862 863 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) { 864 const char* old_value = ""; 865 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false; 866 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 867 size_t new_len = strlen(new_value); 868 const char* value; 869 char* free_this_too = NULL; 870 if (old_len == 0) { 871 value = new_value; 872 } else if (new_len == 0) { 873 value = old_value; 874 } else { 875 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal); 876 // each new setting adds another LINE to the switch: 877 sprintf(buf, "%s\n%s", old_value, new_value); 878 value = buf; 879 free_this_too = buf; 880 } 881 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 882 // CommandLineFlags always returns a pointer that needs freeing. 883 FREE_C_HEAP_ARRAY(char, value); 884 if (free_this_too != NULL) { 885 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 886 FREE_C_HEAP_ARRAY(char, free_this_too); 887 } 888 return true; 889 } 890 891 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) { 892 const char* real_name = real_flag_name(arg); 893 JDK_Version since = JDK_Version(); 894 switch (is_deprecated_flag(arg, &since)) { 895 case -1: 896 return NULL; // obsolete or expired, don't process normally 897 case 0: 898 return real_name; 899 case 1: { 900 if (warn) { 901 char version[256]; 902 since.to_string(version, sizeof(version)); 903 if (real_name != arg) { 904 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.", 905 arg, version, real_name); 906 } else { 907 warning("Option %s was deprecated in version %s and will likely be removed in a future release.", 908 arg, version); 909 } 910 } 911 return real_name; 912 } 913 } 914 ShouldNotReachHere(); 915 return NULL; 916 } 917 918 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) { 919 920 // range of acceptable characters spelled out for portability reasons 921 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 922 #define BUFLEN 255 923 char name[BUFLEN+1]; 924 char dummy; 925 const char* real_name; 926 bool warn_if_deprecated = true; 927 928 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 929 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 930 if (real_name == NULL) { 931 return false; 932 } 933 return set_bool_flag(real_name, false, origin); 934 } 935 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 936 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 937 if (real_name == NULL) { 938 return false; 939 } 940 return set_bool_flag(real_name, true, origin); 941 } 942 943 char punct; 944 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 945 const char* value = strchr(arg, '=') + 1; 946 Flag* flag; 947 948 // this scanf pattern matches both strings (handled here) and numbers (handled later)) 949 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 950 if (real_name == NULL) { 951 return false; 952 } 953 flag = Flag::find_flag(real_name); 954 if (flag != NULL && flag->is_ccstr()) { 955 if (flag->ccstr_accumulates()) { 956 return append_to_string_flag(real_name, value, origin); 957 } else { 958 if (value[0] == '\0') { 959 value = NULL; 960 } 961 return set_string_flag(real_name, value, origin); 962 } 963 } else { 964 warn_if_deprecated = false; // if arg is deprecated, we've already done warning... 965 } 966 } 967 968 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 969 const char* value = strchr(arg, '=') + 1; 970 // -XX:Foo:=xxx will reset the string flag to the given value. 971 if (value[0] == '\0') { 972 value = NULL; 973 } 974 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 975 if (real_name == NULL) { 976 return false; 977 } 978 return set_string_flag(real_name, value, origin); 979 } 980 981 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" 982 #define SIGNED_NUMBER_RANGE "[-0123456789]" 983 #define NUMBER_RANGE "[0123456789]" 984 char value[BUFLEN + 1]; 985 char value2[BUFLEN + 1]; 986 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 987 // Looks like a floating-point number -- try again with more lenient format string 988 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 989 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 990 if (real_name == NULL) { 991 return false; 992 } 993 return set_fp_numeric_flag(real_name, value, origin); 994 } 995 } 996 997 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 998 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 999 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 1000 if (real_name == NULL) { 1001 return false; 1002 } 1003 return set_numeric_flag(real_name, value, origin); 1004 } 1005 1006 return false; 1007 } 1008 1009 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 1010 assert(bldarray != NULL, "illegal argument"); 1011 1012 if (arg == NULL) { 1013 return; 1014 } 1015 1016 int new_count = *count + 1; 1017 1018 // expand the array and add arg to the last element 1019 if (*bldarray == NULL) { 1020 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal); 1021 } else { 1022 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal); 1023 } 1024 (*bldarray)[*count] = os::strdup_check_oom(arg); 1025 *count = new_count; 1026 } 1027 1028 void Arguments::build_jvm_args(const char* arg) { 1029 add_string(&_jvm_args_array, &_num_jvm_args, arg); 1030 } 1031 1032 void Arguments::build_jvm_flags(const char* arg) { 1033 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 1034 } 1035 1036 // utility function to return a string that concatenates all 1037 // strings in a given char** array 1038 const char* Arguments::build_resource_string(char** args, int count) { 1039 if (args == NULL || count == 0) { 1040 return NULL; 1041 } 1042 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator 1043 for (int i = 1; i < count; i++) { 1044 length += strlen(args[i]) + 1; // add 1 for a space 1045 } 1046 char* s = NEW_RESOURCE_ARRAY(char, length); 1047 strcpy(s, args[0]); 1048 for (int j = 1; j < count; j++) { 1049 strcat(s, " "); 1050 strcat(s, args[j]); 1051 } 1052 return (const char*) s; 1053 } 1054 1055 void Arguments::print_on(outputStream* st) { 1056 st->print_cr("VM Arguments:"); 1057 if (num_jvm_flags() > 0) { 1058 st->print("jvm_flags: "); print_jvm_flags_on(st); 1059 st->cr(); 1060 } 1061 if (num_jvm_args() > 0) { 1062 st->print("jvm_args: "); print_jvm_args_on(st); 1063 st->cr(); 1064 } 1065 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 1066 if (_java_class_path != NULL) { 1067 char* path = _java_class_path->value(); 1068 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 1069 } 1070 st->print_cr("Launcher Type: %s", _sun_java_launcher); 1071 } 1072 1073 void Arguments::print_summary_on(outputStream* st) { 1074 // Print the command line. Environment variables that are helpful for 1075 // reproducing the problem are written later in the hs_err file. 1076 // flags are from setting file 1077 if (num_jvm_flags() > 0) { 1078 st->print_raw("Settings File: "); 1079 print_jvm_flags_on(st); 1080 st->cr(); 1081 } 1082 // args are the command line and environment variable arguments. 1083 st->print_raw("Command Line: "); 1084 if (num_jvm_args() > 0) { 1085 print_jvm_args_on(st); 1086 } 1087 // this is the classfile and any arguments to the java program 1088 if (java_command() != NULL) { 1089 st->print("%s", java_command()); 1090 } 1091 st->cr(); 1092 } 1093 1094 void Arguments::print_jvm_flags_on(outputStream* st) { 1095 if (_num_jvm_flags > 0) { 1096 for (int i=0; i < _num_jvm_flags; i++) { 1097 st->print("%s ", _jvm_flags_array[i]); 1098 } 1099 } 1100 } 1101 1102 void Arguments::print_jvm_args_on(outputStream* st) { 1103 if (_num_jvm_args > 0) { 1104 for (int i=0; i < _num_jvm_args; i++) { 1105 st->print("%s ", _jvm_args_array[i]); 1106 } 1107 } 1108 } 1109 1110 bool Arguments::process_argument(const char* arg, 1111 jboolean ignore_unrecognized, 1112 Flag::Flags origin) { 1113 JDK_Version since = JDK_Version(); 1114 1115 if (parse_argument(arg, origin) || ignore_unrecognized) { 1116 return true; 1117 } 1118 1119 // Determine if the flag has '+', '-', or '=' characters. 1120 bool has_plus_minus = (*arg == '+' || *arg == '-'); 1121 const char* const argname = has_plus_minus ? arg + 1 : arg; 1122 1123 size_t arg_len; 1124 const char* equal_sign = strchr(argname, '='); 1125 if (equal_sign == NULL) { 1126 arg_len = strlen(argname); 1127 } else { 1128 arg_len = equal_sign - argname; 1129 } 1130 1131 // Only make the obsolete check for valid arguments. 1132 if (arg_len <= BUFLEN) { 1133 // Construct a string which consists only of the argument name without '+', '-', or '='. 1134 char stripped_argname[BUFLEN+1]; 1135 strncpy(stripped_argname, argname, arg_len); 1136 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate. 1137 1138 if (is_obsolete_flag(stripped_argname, &since)) { 1139 char version[256]; 1140 since.to_string(version, sizeof(version)); 1141 warning("Ignoring option %s; support was removed in %s", stripped_argname, version); 1142 return true; 1143 } 1144 } 1145 1146 // For locked flags, report a custom error message if available. 1147 // Otherwise, report the standard unrecognized VM option. 1148 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true); 1149 if (found_flag != NULL) { 1150 char locked_message_buf[BUFLEN]; 1151 found_flag->get_locked_message(locked_message_buf, BUFLEN); 1152 if (strlen(locked_message_buf) == 0) { 1153 if (found_flag->is_bool() && !has_plus_minus) { 1154 jio_fprintf(defaultStream::error_stream(), 1155 "Missing +/- setting for VM option '%s'\n", argname); 1156 } else if (!found_flag->is_bool() && has_plus_minus) { 1157 jio_fprintf(defaultStream::error_stream(), 1158 "Unexpected +/- setting in VM option '%s'\n", argname); 1159 } else { 1160 jio_fprintf(defaultStream::error_stream(), 1161 "Improperly specified VM option '%s'\n", argname); 1162 } 1163 } else { 1164 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 1165 } 1166 } else { 1167 jio_fprintf(defaultStream::error_stream(), 1168 "Unrecognized VM option '%s'\n", argname); 1169 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true); 1170 if (fuzzy_matched != NULL) { 1171 jio_fprintf(defaultStream::error_stream(), 1172 "Did you mean '%s%s%s'? ", 1173 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 1174 fuzzy_matched->_name, 1175 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 1176 } 1177 } 1178 1179 // allow for commandline "commenting out" options like -XX:#+Verbose 1180 return arg[0] == '#'; 1181 } 1182 1183 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 1184 FILE* stream = fopen(file_name, "rb"); 1185 if (stream == NULL) { 1186 if (should_exist) { 1187 jio_fprintf(defaultStream::error_stream(), 1188 "Could not open settings file %s\n", file_name); 1189 return false; 1190 } else { 1191 return true; 1192 } 1193 } 1194 1195 char token[1024]; 1196 int pos = 0; 1197 1198 bool in_white_space = true; 1199 bool in_comment = false; 1200 bool in_quote = false; 1201 char quote_c = 0; 1202 bool result = true; 1203 1204 int c = getc(stream); 1205 while(c != EOF && pos < (int)(sizeof(token)-1)) { 1206 if (in_white_space) { 1207 if (in_comment) { 1208 if (c == '\n') in_comment = false; 1209 } else { 1210 if (c == '#') in_comment = true; 1211 else if (!isspace(c)) { 1212 in_white_space = false; 1213 token[pos++] = c; 1214 } 1215 } 1216 } else { 1217 if (c == '\n' || (!in_quote && isspace(c))) { 1218 // token ends at newline, or at unquoted whitespace 1219 // this allows a way to include spaces in string-valued options 1220 token[pos] = '\0'; 1221 logOption(token); 1222 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1223 build_jvm_flags(token); 1224 pos = 0; 1225 in_white_space = true; 1226 in_quote = false; 1227 } else if (!in_quote && (c == '\'' || c == '"')) { 1228 in_quote = true; 1229 quote_c = c; 1230 } else if (in_quote && (c == quote_c)) { 1231 in_quote = false; 1232 } else { 1233 token[pos++] = c; 1234 } 1235 } 1236 c = getc(stream); 1237 } 1238 if (pos > 0) { 1239 token[pos] = '\0'; 1240 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1241 build_jvm_flags(token); 1242 } 1243 fclose(stream); 1244 return result; 1245 } 1246 1247 //============================================================================================================= 1248 // Parsing of properties (-D) 1249 1250 const char* Arguments::get_property(const char* key) { 1251 return PropertyList_get_value(system_properties(), key); 1252 } 1253 1254 bool Arguments::add_property(const char* prop) { 1255 const char* eq = strchr(prop, '='); 1256 const char* key; 1257 const char* value = ""; 1258 1259 if (eq == NULL) { 1260 // property doesn't have a value, thus use passed string 1261 key = prop; 1262 } else { 1263 // property have a value, thus extract it and save to the 1264 // allocated string 1265 size_t key_len = eq - prop; 1266 char* tmp_key = AllocateHeap(key_len + 1, mtInternal); 1267 1268 strncpy(tmp_key, prop, key_len); 1269 tmp_key[key_len] = '\0'; 1270 key = tmp_key; 1271 1272 value = &prop[key_len + 1]; 1273 } 1274 1275 if (strcmp(key, "java.compiler") == 0) { 1276 process_java_compiler_argument(value); 1277 // Record value in Arguments, but let it get passed to Java. 1278 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 1279 strcmp(key, "sun.java.launcher.pid") == 0) { 1280 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1281 // private and are processed in process_sun_java_launcher_properties(); 1282 // the sun.java.launcher property is passed on to the java application 1283 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1284 PropertyList_unique_add(&_system_properties, key, value, true); 1285 } else { 1286 if (strcmp(key, "sun.java.command") == 0) { 1287 if (_java_command != NULL) { 1288 os::free(_java_command); 1289 } 1290 _java_command = os::strdup_check_oom(value, mtInternal); 1291 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1292 if (_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) { 1293 assert(_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL"); 1294 os::free((void *)_java_vendor_url_bug); 1295 } 1296 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1297 // its value without going through the property list or making a Java call. 1298 _java_vendor_url_bug = os::strdup_check_oom(value, mtInternal); 1299 } 1300 1301 // Create new property and add at the end of the list 1302 PropertyList_unique_add(&_system_properties, key, value); 1303 } 1304 1305 if (key != prop) { 1306 // SystemProperty copy passed value, thus free previously allocated 1307 // memory 1308 FreeHeap((void *)key); 1309 } 1310 1311 return true; 1312 } 1313 1314 //=========================================================================================================== 1315 // Setting int/mixed/comp mode flags 1316 1317 void Arguments::set_mode_flags(Mode mode) { 1318 // Set up default values for all flags. 1319 // If you add a flag to any of the branches below, 1320 // add a default value for it here. 1321 set_java_compiler(false); 1322 _mode = mode; 1323 1324 // Ensure Agent_OnLoad has the correct initial values. 1325 // This may not be the final mode; mode may change later in onload phase. 1326 PropertyList_unique_add(&_system_properties, "java.vm.info", 1327 VM_Version::vm_info_string(), false); 1328 1329 UseInterpreter = true; 1330 UseCompiler = true; 1331 UseLoopCounter = true; 1332 1333 // Default values may be platform/compiler dependent - 1334 // use the saved values 1335 ClipInlining = Arguments::_ClipInlining; 1336 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1337 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1338 BackgroundCompilation = Arguments::_BackgroundCompilation; 1339 if (TieredCompilation) { 1340 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) { 1341 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog; 1342 } 1343 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) { 1344 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold; 1345 } 1346 } 1347 1348 // Change from defaults based on mode 1349 switch (mode) { 1350 default: 1351 ShouldNotReachHere(); 1352 break; 1353 case _int: 1354 UseCompiler = false; 1355 UseLoopCounter = false; 1356 AlwaysCompileLoopMethods = false; 1357 UseOnStackReplacement = false; 1358 break; 1359 case _mixed: 1360 // same as default 1361 break; 1362 case _comp: 1363 UseInterpreter = false; 1364 BackgroundCompilation = false; 1365 ClipInlining = false; 1366 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1367 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1368 // compile a level 4 (C2) and then continue executing it. 1369 if (TieredCompilation) { 1370 Tier3InvokeNotifyFreqLog = 0; 1371 Tier4InvocationThreshold = 0; 1372 } 1373 break; 1374 } 1375 } 1376 1377 #if defined(COMPILER2) || defined(_LP64) || !INCLUDE_CDS 1378 // Conflict: required to use shared spaces (-Xshare:on), but 1379 // incompatible command line options were chosen. 1380 1381 static void no_shared_spaces(const char* message) { 1382 if (RequireSharedSpaces) { 1383 jio_fprintf(defaultStream::error_stream(), 1384 "Class data sharing is inconsistent with other specified options.\n"); 1385 vm_exit_during_initialization("Unable to use shared archive.", message); 1386 } else { 1387 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1388 } 1389 } 1390 #endif 1391 1392 // Returns threshold scaled with the value of scale. 1393 // If scale < 0.0, threshold is returned without scaling. 1394 intx Arguments::scaled_compile_threshold(intx threshold, double scale) { 1395 if (scale == 1.0 || scale < 0.0) { 1396 return threshold; 1397 } else { 1398 return (intx)(threshold * scale); 1399 } 1400 } 1401 1402 // Returns freq_log scaled with the value of scale. 1403 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1]. 1404 // If scale < 0.0, freq_log is returned without scaling. 1405 intx Arguments::scaled_freq_log(intx freq_log, double scale) { 1406 // Check if scaling is necessary or if negative value was specified. 1407 if (scale == 1.0 || scale < 0.0) { 1408 return freq_log; 1409 } 1410 // Check values to avoid calculating log2 of 0. 1411 if (scale == 0.0 || freq_log == 0) { 1412 return 0; 1413 } 1414 // Determine the maximum notification frequency value currently supported. 1415 // The largest mask value that the interpreter/C1 can handle is 1416 // of length InvocationCounter::number_of_count_bits. Mask values are always 1417 // one bit shorter then the value of the notification frequency. Set 1418 // max_freq_bits accordingly. 1419 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1; 1420 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale); 1421 if (scaled_freq == 0) { 1422 // Return 0 right away to avoid calculating log2 of 0. 1423 return 0; 1424 } else if (scaled_freq > nth_bit(max_freq_bits)) { 1425 return max_freq_bits; 1426 } else { 1427 return log2_intptr(scaled_freq); 1428 } 1429 } 1430 1431 void Arguments::set_tiered_flags() { 1432 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. 1433 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { 1434 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); 1435 } 1436 if (CompilationPolicyChoice < 2) { 1437 vm_exit_during_initialization( 1438 "Incompatible compilation policy selected", NULL); 1439 } 1440 // Increase the code cache size - tiered compiles a lot more. 1441 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1442 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize, 1443 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5)); 1444 } 1445 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M 1446 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { 1447 FLAG_SET_ERGO(bool, SegmentedCodeCache, true); 1448 1449 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1450 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap) 1451 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) { 1452 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1453 } 1454 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) { 1455 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1456 } 1457 // Check consistency of code heap sizes 1458 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 1459 jio_fprintf(defaultStream::error_stream(), 1460 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 1461 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 1462 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 1463 vm_exit(1); 1464 } 1465 } 1466 } 1467 if (!UseInterpreter) { // -Xcomp 1468 Tier3InvokeNotifyFreqLog = 0; 1469 Tier4InvocationThreshold = 0; 1470 } 1471 1472 if (CompileThresholdScaling < 0) { 1473 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL); 1474 } 1475 1476 // Scale tiered compilation thresholds. 1477 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged. 1478 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 1479 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog)); 1480 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog)); 1481 1482 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold)); 1483 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold)); 1484 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold)); 1485 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold)); 1486 1487 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here 1488 // once these thresholds become supported. 1489 1490 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog)); 1491 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog)); 1492 1493 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog)); 1494 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog)); 1495 1496 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog)); 1497 1498 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold)); 1499 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold)); 1500 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold)); 1501 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold)); 1502 } 1503 } 1504 1505 #if INCLUDE_ALL_GCS 1506 static void disable_adaptive_size_policy(const char* collector_name) { 1507 if (UseAdaptiveSizePolicy) { 1508 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) { 1509 warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.", 1510 collector_name); 1511 } 1512 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 1513 } 1514 } 1515 1516 void Arguments::set_parnew_gc_flags() { 1517 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, 1518 "control point invariant"); 1519 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1520 assert(UseParNewGC, "ParNew should always be used with CMS"); 1521 1522 if (FLAG_IS_DEFAULT(ParallelGCThreads)) { 1523 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1524 assert(ParallelGCThreads > 0, "We should always have at least one thread by default"); 1525 } else if (ParallelGCThreads == 0) { 1526 jio_fprintf(defaultStream::error_stream(), 1527 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n"); 1528 vm_exit(1); 1529 } 1530 1531 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, 1532 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 1533 // we set them to 1024 and 1024. 1534 // See CR 6362902. 1535 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 1536 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 1537 } 1538 if (FLAG_IS_DEFAULT(OldPLABSize)) { 1539 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 1540 } 1541 1542 // When using compressed oops, we use local overflow stacks, 1543 // rather than using a global overflow list chained through 1544 // the klass word of the object's pre-image. 1545 if (UseCompressedOops && !ParGCUseLocalOverflow) { 1546 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { 1547 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); 1548 } 1549 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); 1550 } 1551 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); 1552 } 1553 1554 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on 1555 // sparc/solaris for certain applications, but would gain from 1556 // further optimization and tuning efforts, and would almost 1557 // certainly gain from analysis of platform and environment. 1558 void Arguments::set_cms_and_parnew_gc_flags() { 1559 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); 1560 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1561 assert(UseParNewGC, "ParNew should always be used with CMS"); 1562 1563 // Turn off AdaptiveSizePolicy by default for cms until it is complete. 1564 disable_adaptive_size_policy("UseConcMarkSweepGC"); 1565 1566 set_parnew_gc_flags(); 1567 1568 size_t max_heap = align_size_down(MaxHeapSize, 1569 CardTableRS::ct_max_alignment_constraint()); 1570 1571 // Now make adjustments for CMS 1572 intx tenuring_default = (intx)6; 1573 size_t young_gen_per_worker = CMSYoungGenPerWorker; 1574 1575 // Preferred young gen size for "short" pauses: 1576 // upper bound depends on # of threads and NewRatio. 1577 const size_t preferred_max_new_size_unaligned = 1578 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads)); 1579 size_t preferred_max_new_size = 1580 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1581 1582 // Unless explicitly requested otherwise, size young gen 1583 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads 1584 1585 // If either MaxNewSize or NewRatio is set on the command line, 1586 // assume the user is trying to set the size of the young gen. 1587 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { 1588 1589 // Set MaxNewSize to our calculated preferred_max_new_size unless 1590 // NewSize was set on the command line and it is larger than 1591 // preferred_max_new_size. 1592 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1593 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1594 } else { 1595 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size); 1596 } 1597 if (PrintGCDetails && Verbose) { 1598 // Too early to use gclog_or_tty 1599 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1600 } 1601 1602 // Code along this path potentially sets NewSize and OldSize 1603 if (PrintGCDetails && Verbose) { 1604 // Too early to use gclog_or_tty 1605 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT 1606 " initial_heap_size: " SIZE_FORMAT 1607 " max_heap: " SIZE_FORMAT, 1608 min_heap_size(), InitialHeapSize, max_heap); 1609 } 1610 size_t min_new = preferred_max_new_size; 1611 if (FLAG_IS_CMDLINE(NewSize)) { 1612 min_new = NewSize; 1613 } 1614 if (max_heap > min_new && min_heap_size() > min_new) { 1615 // Unless explicitly requested otherwise, make young gen 1616 // at least min_new, and at most preferred_max_new_size. 1617 if (FLAG_IS_DEFAULT(NewSize)) { 1618 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new)); 1619 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize)); 1620 if (PrintGCDetails && Verbose) { 1621 // Too early to use gclog_or_tty 1622 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize); 1623 } 1624 } 1625 // Unless explicitly requested otherwise, size old gen 1626 // so it's NewRatio x of NewSize. 1627 if (FLAG_IS_DEFAULT(OldSize)) { 1628 if (max_heap > NewSize) { 1629 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize)); 1630 if (PrintGCDetails && Verbose) { 1631 // Too early to use gclog_or_tty 1632 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize); 1633 } 1634 } 1635 } 1636 } 1637 } 1638 // Unless explicitly requested otherwise, definitely 1639 // promote all objects surviving "tenuring_default" scavenges. 1640 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1641 FLAG_IS_DEFAULT(SurvivorRatio)) { 1642 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default); 1643 } 1644 // If we decided above (or user explicitly requested) 1645 // `promote all' (via MaxTenuringThreshold := 0), 1646 // prefer minuscule survivor spaces so as not to waste 1647 // space for (non-existent) survivors 1648 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1649 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio)); 1650 } 1651 1652 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words, 1653 // but rather the number of free blocks of a given size that are used when 1654 // replenishing the local per-worker free list caches. 1655 if (FLAG_IS_DEFAULT(OldPLABSize)) { 1656 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { 1657 // OldPLAB sizing manually turned off: Use a larger default setting, 1658 // unless it was manually specified. This is because a too-low value 1659 // will slow down scavenges. 1660 FLAG_SET_ERGO(size_t, OldPLABSize, CFLS_LAB::_default_static_old_plab_size); // default value before 6631166 1661 } else { 1662 FLAG_SET_DEFAULT(OldPLABSize, CFLS_LAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default 1663 } 1664 } 1665 1666 // If either of the static initialization defaults have changed, note this 1667 // modification. 1668 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) { 1669 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); 1670 } 1671 1672 if (!ClassUnloading) { 1673 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false); 1674 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false); 1675 } 1676 1677 if (PrintGCDetails && Verbose) { 1678 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1679 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1680 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); 1681 } 1682 } 1683 #endif // INCLUDE_ALL_GCS 1684 1685 void set_object_alignment() { 1686 // Object alignment. 1687 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1688 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1689 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1690 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1691 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1692 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1693 1694 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1695 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1696 1697 // Oop encoding heap max 1698 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1699 1700 if (SurvivorAlignmentInBytes == 0) { 1701 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1702 } 1703 1704 #if INCLUDE_ALL_GCS 1705 // Set CMS global values 1706 CompactibleFreeListSpace::set_cms_values(); 1707 #endif // INCLUDE_ALL_GCS 1708 } 1709 1710 size_t Arguments::max_heap_for_compressed_oops() { 1711 // Avoid sign flip. 1712 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1713 // We need to fit both the NULL page and the heap into the memory budget, while 1714 // keeping alignment constraints of the heap. To guarantee the latter, as the 1715 // NULL page is located before the heap, we pad the NULL page to the conservative 1716 // maximum alignment that the GC may ever impose upon the heap. 1717 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(), 1718 _conservative_max_heap_alignment); 1719 1720 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1721 NOT_LP64(ShouldNotReachHere(); return 0); 1722 } 1723 1724 bool Arguments::should_auto_select_low_pause_collector() { 1725 if (UseAutoGCSelectPolicy && 1726 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1727 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1728 if (PrintGCDetails) { 1729 // Cannot use gclog_or_tty yet. 1730 tty->print_cr("Automatic selection of the low pause collector" 1731 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis); 1732 } 1733 return true; 1734 } 1735 return false; 1736 } 1737 1738 void Arguments::set_use_compressed_oops() { 1739 #ifndef ZERO 1740 #ifdef _LP64 1741 // MaxHeapSize is not set up properly at this point, but 1742 // the only value that can override MaxHeapSize if we are 1743 // to use UseCompressedOops is InitialHeapSize. 1744 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1745 1746 if (max_heap_size <= max_heap_for_compressed_oops()) { 1747 #if !defined(COMPILER1) || defined(TIERED) 1748 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1749 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1750 } 1751 #endif 1752 } else { 1753 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1754 warning("Max heap size too large for Compressed Oops"); 1755 FLAG_SET_DEFAULT(UseCompressedOops, false); 1756 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1757 } 1758 } 1759 #endif // _LP64 1760 #endif // ZERO 1761 } 1762 1763 1764 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1765 // set_use_compressed_oops(). 1766 void Arguments::set_use_compressed_klass_ptrs() { 1767 #ifndef ZERO 1768 #ifdef _LP64 1769 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1770 if (!UseCompressedOops) { 1771 if (UseCompressedClassPointers) { 1772 warning("UseCompressedClassPointers requires UseCompressedOops"); 1773 } 1774 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1775 } else { 1776 // Turn on UseCompressedClassPointers too 1777 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1778 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1779 } 1780 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1781 if (UseCompressedClassPointers) { 1782 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1783 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1784 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1785 } 1786 } 1787 } 1788 #endif // _LP64 1789 #endif // !ZERO 1790 } 1791 1792 void Arguments::set_conservative_max_heap_alignment() { 1793 // The conservative maximum required alignment for the heap is the maximum of 1794 // the alignments imposed by several sources: any requirements from the heap 1795 // itself, the collector policy and the maximum page size we may run the VM 1796 // with. 1797 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment(); 1798 #if INCLUDE_ALL_GCS 1799 if (UseParallelGC) { 1800 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment(); 1801 } else if (UseG1GC) { 1802 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment(); 1803 } 1804 #endif // INCLUDE_ALL_GCS 1805 _conservative_max_heap_alignment = MAX4(heap_alignment, 1806 (size_t)os::vm_allocation_granularity(), 1807 os::max_page_size(), 1808 CollectorPolicy::compute_heap_alignment()); 1809 } 1810 1811 void Arguments::select_gc_ergonomically() { 1812 if (os::is_server_class_machine()) { 1813 if (should_auto_select_low_pause_collector()) { 1814 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1815 } else { 1816 #if defined(JAVASE_EMBEDDED) 1817 FLAG_SET_ERGO(bool, UseParallelGC, true); 1818 #else 1819 FLAG_SET_ERGO(bool, UseG1GC, true); 1820 #endif 1821 } 1822 } else { 1823 FLAG_SET_ERGO(bool, UseSerialGC, true); 1824 } 1825 } 1826 1827 void Arguments::select_gc() { 1828 if (!gc_selected()) { 1829 select_gc_ergonomically(); 1830 guarantee(gc_selected(), "No GC selected"); 1831 } 1832 } 1833 1834 void Arguments::set_ergonomics_flags() { 1835 select_gc(); 1836 1837 #ifdef COMPILER2 1838 // Shared spaces work fine with other GCs but causes bytecode rewriting 1839 // to be disabled, which hurts interpreter performance and decreases 1840 // server performance. When -server is specified, keep the default off 1841 // unless it is asked for. Future work: either add bytecode rewriting 1842 // at link time, or rewrite bytecodes in non-shared methods. 1843 if (!DumpSharedSpaces && !RequireSharedSpaces && 1844 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { 1845 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); 1846 } 1847 #endif 1848 1849 set_conservative_max_heap_alignment(); 1850 1851 #ifndef ZERO 1852 #ifdef _LP64 1853 set_use_compressed_oops(); 1854 1855 // set_use_compressed_klass_ptrs() must be called after calling 1856 // set_use_compressed_oops(). 1857 set_use_compressed_klass_ptrs(); 1858 1859 // Also checks that certain machines are slower with compressed oops 1860 // in vm_version initialization code. 1861 #endif // _LP64 1862 #endif // !ZERO 1863 1864 CodeCacheExtensions::set_ergonomics_flags(); 1865 } 1866 1867 void Arguments::set_parallel_gc_flags() { 1868 assert(UseParallelGC || UseParallelOldGC, "Error"); 1869 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file). 1870 if (FLAG_IS_DEFAULT(UseParallelOldGC)) { 1871 FLAG_SET_DEFAULT(UseParallelOldGC, true); 1872 } 1873 FLAG_SET_DEFAULT(UseParallelGC, true); 1874 1875 // If no heap maximum was requested explicitly, use some reasonable fraction 1876 // of the physical memory, up to a maximum of 1GB. 1877 FLAG_SET_DEFAULT(ParallelGCThreads, 1878 Abstract_VM_Version::parallel_worker_threads()); 1879 if (ParallelGCThreads == 0) { 1880 jio_fprintf(defaultStream::error_stream(), 1881 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n"); 1882 vm_exit(1); 1883 } 1884 1885 if (UseAdaptiveSizePolicy) { 1886 // We don't want to limit adaptive heap sizing's freedom to adjust the heap 1887 // unless the user actually sets these flags. 1888 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) { 1889 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0); 1890 } 1891 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) { 1892 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100); 1893 } 1894 } 1895 1896 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1897 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1898 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1899 // See CR 6362902 for details. 1900 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1901 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1902 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1903 } 1904 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1905 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1906 } 1907 } 1908 1909 if (UseParallelOldGC) { 1910 // Par compact uses lower default values since they are treated as 1911 // minimums. These are different defaults because of the different 1912 // interpretation and are not ergonomically set. 1913 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1914 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1915 } 1916 } 1917 } 1918 1919 void Arguments::set_g1_gc_flags() { 1920 assert(UseG1GC, "Error"); 1921 #ifdef COMPILER1 1922 FastTLABRefill = false; 1923 #endif 1924 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1925 if (ParallelGCThreads == 0) { 1926 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0."); 1927 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL); 1928 } 1929 1930 #if INCLUDE_ALL_GCS 1931 if (G1ConcRefinementThreads == 0) { 1932 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads); 1933 } 1934 #endif 1935 1936 // MarkStackSize will be set (if it hasn't been set by the user) 1937 // when concurrent marking is initialized. 1938 // Its value will be based upon the number of parallel marking threads. 1939 // But we do set the maximum mark stack size here. 1940 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) { 1941 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE); 1942 } 1943 1944 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { 1945 // In G1, we want the default GC overhead goal to be higher than 1946 // say in PS. So we set it here to 10%. Otherwise the heap might 1947 // be expanded more aggressively than we would like it to. In 1948 // fact, even 10% seems to not be high enough in some cases 1949 // (especially small GC stress tests that the main thing they do 1950 // is allocation). We might consider increase it further. 1951 FLAG_SET_DEFAULT(GCTimeRatio, 9); 1952 } 1953 1954 if (PrintGCDetails && Verbose) { 1955 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1956 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1957 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); 1958 } 1959 } 1960 1961 #if !INCLUDE_ALL_GCS 1962 #ifdef ASSERT 1963 static bool verify_serial_gc_flags() { 1964 return (UseSerialGC && 1965 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC || 1966 UseParallelGC || UseParallelOldGC)); 1967 } 1968 #endif // ASSERT 1969 #endif // INCLUDE_ALL_GCS 1970 1971 void Arguments::set_gc_specific_flags() { 1972 #if INCLUDE_ALL_GCS 1973 // Set per-collector flags 1974 if (UseParallelGC || UseParallelOldGC) { 1975 set_parallel_gc_flags(); 1976 } else if (UseConcMarkSweepGC) { 1977 set_cms_and_parnew_gc_flags(); 1978 } else if (UseG1GC) { 1979 set_g1_gc_flags(); 1980 } 1981 if (AssumeMP && !UseSerialGC) { 1982 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 1983 warning("If the number of processors is expected to increase from one, then" 1984 " you should configure the number of parallel GC threads appropriately" 1985 " using -XX:ParallelGCThreads=N"); 1986 } 1987 } 1988 if (MinHeapFreeRatio == 100) { 1989 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1990 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99); 1991 } 1992 #else // INCLUDE_ALL_GCS 1993 assert(verify_serial_gc_flags(), "SerialGC unset"); 1994 #endif // INCLUDE_ALL_GCS 1995 } 1996 1997 julong Arguments::limit_by_allocatable_memory(julong limit) { 1998 julong max_allocatable; 1999 julong result = limit; 2000 if (os::has_allocatable_memory_limit(&max_allocatable)) { 2001 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 2002 } 2003 return result; 2004 } 2005 2006 // Use static initialization to get the default before parsing 2007 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress; 2008 2009 void Arguments::set_heap_size() { 2010 const julong phys_mem = 2011 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 2012 : (julong)MaxRAM; 2013 2014 // If the maximum heap size has not been set with -Xmx, 2015 // then set it as fraction of the size of physical memory, 2016 // respecting the maximum and minimum sizes of the heap. 2017 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2018 julong reasonable_max = phys_mem / MaxRAMFraction; 2019 2020 if (phys_mem <= MaxHeapSize * MinRAMFraction) { 2021 // Small physical memory, so use a minimum fraction of it for the heap 2022 reasonable_max = phys_mem / MinRAMFraction; 2023 } else { 2024 // Not-small physical memory, so require a heap at least 2025 // as large as MaxHeapSize 2026 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 2027 } 2028 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 2029 // Limit the heap size to ErgoHeapSizeLimit 2030 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 2031 } 2032 if (UseCompressedOops) { 2033 // Limit the heap size to the maximum possible when using compressed oops 2034 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 2035 2036 // HeapBaseMinAddress can be greater than default but not less than. 2037 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 2038 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 2039 // matches compressed oops printing flags 2040 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { 2041 jio_fprintf(defaultStream::error_stream(), 2042 "HeapBaseMinAddress must be at least " SIZE_FORMAT 2043 " (" SIZE_FORMAT "G) which is greater than value given " 2044 SIZE_FORMAT "\n", 2045 DefaultHeapBaseMinAddress, 2046 DefaultHeapBaseMinAddress/G, 2047 HeapBaseMinAddress); 2048 } 2049 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 2050 } 2051 } 2052 2053 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 2054 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 2055 // but it should be not less than default MaxHeapSize. 2056 max_coop_heap -= HeapBaseMinAddress; 2057 } 2058 reasonable_max = MIN2(reasonable_max, max_coop_heap); 2059 } 2060 reasonable_max = limit_by_allocatable_memory(reasonable_max); 2061 2062 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 2063 // An initial heap size was specified on the command line, 2064 // so be sure that the maximum size is consistent. Done 2065 // after call to limit_by_allocatable_memory because that 2066 // method might reduce the allocation size. 2067 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 2068 } 2069 2070 if (PrintGCDetails && Verbose) { 2071 // Cannot use gclog_or_tty yet. 2072 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 2073 } 2074 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max); 2075 } 2076 2077 // If the minimum or initial heap_size have not been set or requested to be set 2078 // ergonomically, set them accordingly. 2079 if (InitialHeapSize == 0 || min_heap_size() == 0) { 2080 julong reasonable_minimum = (julong)(OldSize + NewSize); 2081 2082 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 2083 2084 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 2085 2086 if (InitialHeapSize == 0) { 2087 julong reasonable_initial = phys_mem / InitialRAMFraction; 2088 2089 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 2090 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 2091 2092 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 2093 2094 if (PrintGCDetails && Verbose) { 2095 // Cannot use gclog_or_tty yet. 2096 tty->print_cr(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial); 2097 } 2098 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial); 2099 } 2100 // If the minimum heap size has not been set (via -Xms), 2101 // synchronize with InitialHeapSize to avoid errors with the default value. 2102 if (min_heap_size() == 0) { 2103 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize)); 2104 if (PrintGCDetails && Verbose) { 2105 // Cannot use gclog_or_tty yet. 2106 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 2107 } 2108 } 2109 } 2110 } 2111 2112 // This option inspects the machine and attempts to set various 2113 // parameters to be optimal for long-running, memory allocation 2114 // intensive jobs. It is intended for machines with large 2115 // amounts of cpu and memory. 2116 jint Arguments::set_aggressive_heap_flags() { 2117 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 2118 // VM, but we may not be able to represent the total physical memory 2119 // available (like having 8gb of memory on a box but using a 32bit VM). 2120 // Thus, we need to make sure we're using a julong for intermediate 2121 // calculations. 2122 julong initHeapSize; 2123 julong total_memory = os::physical_memory(); 2124 2125 if (total_memory < (julong) 256 * M) { 2126 jio_fprintf(defaultStream::error_stream(), 2127 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 2128 vm_exit(1); 2129 } 2130 2131 // The heap size is half of available memory, or (at most) 2132 // all of possible memory less 160mb (leaving room for the OS 2133 // when using ISM). This is the maximum; because adaptive sizing 2134 // is turned on below, the actual space used may be smaller. 2135 2136 initHeapSize = MIN2(total_memory / (julong) 2, 2137 total_memory - (julong) 160 * M); 2138 2139 initHeapSize = limit_by_allocatable_memory(initHeapSize); 2140 2141 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2142 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) { 2143 return JNI_EINVAL; 2144 } 2145 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) { 2146 return JNI_EINVAL; 2147 } 2148 // Currently the minimum size and the initial heap sizes are the same. 2149 set_min_heap_size(initHeapSize); 2150 } 2151 if (FLAG_IS_DEFAULT(NewSize)) { 2152 // Make the young generation 3/8ths of the total heap. 2153 if (FLAG_SET_CMDLINE(size_t, NewSize, 2154 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) { 2155 return JNI_EINVAL; 2156 } 2157 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) { 2158 return JNI_EINVAL; 2159 } 2160 } 2161 2162 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 2163 FLAG_SET_DEFAULT(UseLargePages, true); 2164 #endif 2165 2166 // Increase some data structure sizes for efficiency 2167 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) { 2168 return JNI_EINVAL; 2169 } 2170 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) { 2171 return JNI_EINVAL; 2172 } 2173 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) { 2174 return JNI_EINVAL; 2175 } 2176 2177 // See the OldPLABSize comment below, but replace 'after promotion' 2178 // with 'after copying'. YoungPLABSize is the size of the survivor 2179 // space per-gc-thread buffers. The default is 4kw. 2180 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words 2181 return JNI_EINVAL; 2182 } 2183 2184 // OldPLABSize is the size of the buffers in the old gen that 2185 // UseParallelGC uses to promote live data that doesn't fit in the 2186 // survivor spaces. At any given time, there's one for each gc thread. 2187 // The default size is 1kw. These buffers are rarely used, since the 2188 // survivor spaces are usually big enough. For specjbb, however, there 2189 // are occasions when there's lots of live data in the young gen 2190 // and we end up promoting some of it. We don't have a definite 2191 // explanation for why bumping OldPLABSize helps, but the theory 2192 // is that a bigger PLAB results in retaining something like the 2193 // original allocation order after promotion, which improves mutator 2194 // locality. A minor effect may be that larger PLABs reduce the 2195 // number of PLAB allocation events during gc. The value of 8kw 2196 // was arrived at by experimenting with specjbb. 2197 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words 2198 return JNI_EINVAL; 2199 } 2200 2201 // Enable parallel GC and adaptive generation sizing 2202 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) { 2203 return JNI_EINVAL; 2204 } 2205 FLAG_SET_DEFAULT(ParallelGCThreads, 2206 Abstract_VM_Version::parallel_worker_threads()); 2207 2208 // Encourage steady state memory management 2209 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) { 2210 return JNI_EINVAL; 2211 } 2212 2213 // This appears to improve mutator locality 2214 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 2215 return JNI_EINVAL; 2216 } 2217 2218 // Get around early Solaris scheduling bug 2219 // (affinity vs other jobs on system) 2220 // but disallow DR and offlining (5008695). 2221 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) { 2222 return JNI_EINVAL; 2223 } 2224 2225 return JNI_OK; 2226 } 2227 2228 // This must be called after ergonomics. 2229 void Arguments::set_bytecode_flags() { 2230 if (!RewriteBytecodes) { 2231 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 2232 } 2233 } 2234 2235 // Aggressive optimization flags -XX:+AggressiveOpts 2236 jint Arguments::set_aggressive_opts_flags() { 2237 #ifdef COMPILER2 2238 if (AggressiveUnboxing) { 2239 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 2240 FLAG_SET_DEFAULT(EliminateAutoBox, true); 2241 } else if (!EliminateAutoBox) { 2242 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 2243 AggressiveUnboxing = false; 2244 } 2245 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 2246 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 2247 } else if (!DoEscapeAnalysis) { 2248 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 2249 AggressiveUnboxing = false; 2250 } 2251 } 2252 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 2253 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 2254 FLAG_SET_DEFAULT(EliminateAutoBox, true); 2255 } 2256 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 2257 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 2258 } 2259 2260 // Feed the cache size setting into the JDK 2261 char buffer[1024]; 2262 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 2263 if (!add_property(buffer)) { 2264 return JNI_ENOMEM; 2265 } 2266 } 2267 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 2268 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 2269 } 2270 #endif 2271 2272 if (AggressiveOpts) { 2273 // Sample flag setting code 2274 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 2275 // FLAG_SET_DEFAULT(EliminateZeroing, true); 2276 // } 2277 } 2278 2279 return JNI_OK; 2280 } 2281 2282 //=========================================================================================================== 2283 // Parsing of java.compiler property 2284 2285 void Arguments::process_java_compiler_argument(const char* arg) { 2286 // For backwards compatibility, Djava.compiler=NONE or "" 2287 // causes us to switch to -Xint mode UNLESS -Xdebug 2288 // is also specified. 2289 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 2290 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 2291 } 2292 } 2293 2294 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2295 _sun_java_launcher = os::strdup_check_oom(launcher); 2296 } 2297 2298 bool Arguments::created_by_java_launcher() { 2299 assert(_sun_java_launcher != NULL, "property must have value"); 2300 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2301 } 2302 2303 bool Arguments::sun_java_launcher_is_altjvm() { 2304 return _sun_java_launcher_is_altjvm; 2305 } 2306 2307 //=========================================================================================================== 2308 // Parsing of main arguments 2309 2310 // check if do gclog rotation 2311 // +UseGCLogFileRotation is a must, 2312 // no gc log rotation when log file not supplied or 2313 // NumberOfGCLogFiles is 0 2314 void check_gclog_consistency() { 2315 if (UseGCLogFileRotation) { 2316 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) { 2317 jio_fprintf(defaultStream::output_stream(), 2318 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n" 2319 "where num_of_file > 0\n" 2320 "GC log rotation is turned off\n"); 2321 UseGCLogFileRotation = false; 2322 } 2323 } 2324 2325 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) { 2326 if (FLAG_SET_CMDLINE(size_t, GCLogFileSize, 8*K) == Flag::SUCCESS) { 2327 jio_fprintf(defaultStream::output_stream(), 2328 "GCLogFileSize changed to minimum 8K\n"); 2329 } 2330 } 2331 } 2332 2333 // This function is called for -Xloggc:<filename>, it can be used 2334 // to check if a given file name(or string) conforms to the following 2335 // specification: 2336 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]" 2337 // %p and %t only allowed once. We only limit usage of filename not path 2338 bool is_filename_valid(const char *file_name) { 2339 const char* p = file_name; 2340 char file_sep = os::file_separator()[0]; 2341 const char* cp; 2342 // skip prefix path 2343 for (cp = file_name; *cp != '\0'; cp++) { 2344 if (*cp == '/' || *cp == file_sep) { 2345 p = cp + 1; 2346 } 2347 } 2348 2349 int count_p = 0; 2350 int count_t = 0; 2351 while (*p != '\0') { 2352 if ((*p >= '0' && *p <= '9') || 2353 (*p >= 'A' && *p <= 'Z') || 2354 (*p >= 'a' && *p <= 'z') || 2355 *p == '-' || 2356 *p == '_' || 2357 *p == '.') { 2358 p++; 2359 continue; 2360 } 2361 if (*p == '%') { 2362 if(*(p + 1) == 'p') { 2363 p += 2; 2364 count_p ++; 2365 continue; 2366 } 2367 if (*(p + 1) == 't') { 2368 p += 2; 2369 count_t ++; 2370 continue; 2371 } 2372 } 2373 return false; 2374 } 2375 return count_p < 2 && count_t < 2; 2376 } 2377 2378 // Check consistency of GC selection 2379 bool Arguments::check_gc_consistency() { 2380 check_gclog_consistency(); 2381 // Ensure that the user has not selected conflicting sets 2382 // of collectors. 2383 uint i = 0; 2384 if (UseSerialGC) i++; 2385 if (UseConcMarkSweepGC) i++; 2386 if (UseParallelGC || UseParallelOldGC) i++; 2387 if (UseG1GC) i++; 2388 if (i > 1) { 2389 jio_fprintf(defaultStream::error_stream(), 2390 "Conflicting collector combinations in option list; " 2391 "please refer to the release notes for the combinations " 2392 "allowed\n"); 2393 return false; 2394 } 2395 2396 if (UseConcMarkSweepGC && !UseParNewGC) { 2397 jio_fprintf(defaultStream::error_stream(), 2398 "It is not possible to combine the DefNew young collector with the CMS collector.\n"); 2399 return false; 2400 } 2401 2402 if (UseParNewGC && !UseConcMarkSweepGC) { 2403 jio_fprintf(defaultStream::error_stream(), 2404 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n"); 2405 return false; 2406 } 2407 2408 return true; 2409 } 2410 2411 // Check the consistency of vm_init_args 2412 bool Arguments::check_vm_args_consistency() { 2413 // Method for adding checks for flag consistency. 2414 // The intent is to warn the user of all possible conflicts, 2415 // before returning an error. 2416 // Note: Needs platform-dependent factoring. 2417 bool status = true; 2418 2419 if (TLABRefillWasteFraction == 0) { 2420 jio_fprintf(defaultStream::error_stream(), 2421 "TLABRefillWasteFraction should be a denominator, " 2422 "not " SIZE_FORMAT "\n", 2423 TLABRefillWasteFraction); 2424 status = false; 2425 } 2426 2427 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 2428 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 2429 } 2430 2431 if (UseParallelOldGC && ParallelOldGCSplitALot) { 2432 // Settings to encourage splitting. 2433 if (!FLAG_IS_CMDLINE(NewRatio)) { 2434 if (FLAG_SET_CMDLINE(uintx, NewRatio, 2) != Flag::SUCCESS) { 2435 status = false; 2436 } 2437 } 2438 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { 2439 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 2440 status = false; 2441 } 2442 } 2443 } 2444 2445 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) { 2446 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false); 2447 } 2448 2449 if (GCTimeLimit == 100) { 2450 // Turn off gc-overhead-limit-exceeded checks 2451 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 2452 } 2453 2454 status = status && check_gc_consistency(); 2455 2456 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 2457 // insists that we hold the requisite locks so that the iteration is 2458 // MT-safe. For the verification at start-up and shut-down, we don't 2459 // yet have a good way of acquiring and releasing these locks, 2460 // which are not visible at the CollectedHeap level. We want to 2461 // be able to acquire these locks and then do the iteration rather 2462 // than just disable the lock verification. This will be fixed under 2463 // bug 4788986. 2464 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 2465 if (VerifyDuringStartup) { 2466 warning("Heap verification at start-up disabled " 2467 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2468 VerifyDuringStartup = false; // Disable verification at start-up 2469 } 2470 2471 if (VerifyBeforeExit) { 2472 warning("Heap verification at shutdown disabled " 2473 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2474 VerifyBeforeExit = false; // Disable verification at shutdown 2475 } 2476 } 2477 2478 // Note: only executed in non-PRODUCT mode 2479 if (!UseAsyncConcMarkSweepGC && 2480 (ExplicitGCInvokesConcurrent || 2481 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 2482 jio_fprintf(defaultStream::error_stream(), 2483 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts" 2484 " with -UseAsyncConcMarkSweepGC"); 2485 status = false; 2486 } 2487 2488 if (PrintNMTStatistics) { 2489 #if INCLUDE_NMT 2490 if (MemTracker::tracking_level() == NMT_off) { 2491 #endif // INCLUDE_NMT 2492 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2493 PrintNMTStatistics = false; 2494 #if INCLUDE_NMT 2495 } 2496 #endif 2497 } 2498 2499 // Check lower bounds of the code cache 2500 // Template Interpreter code is approximately 3X larger in debug builds. 2501 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); 2502 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) { 2503 jio_fprintf(defaultStream::error_stream(), 2504 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K, 2505 os::vm_page_size()/K); 2506 status = false; 2507 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) { 2508 jio_fprintf(defaultStream::error_stream(), 2509 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", 2510 ReservedCodeCacheSize/K, InitialCodeCacheSize/K); 2511 status = false; 2512 } else if (ReservedCodeCacheSize < min_code_cache_size) { 2513 jio_fprintf(defaultStream::error_stream(), 2514 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, 2515 min_code_cache_size/K); 2516 status = false; 2517 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) { 2518 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported. 2519 jio_fprintf(defaultStream::error_stream(), 2520 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, 2521 CODE_CACHE_SIZE_LIMIT/M); 2522 status = false; 2523 } else if (NonNMethodCodeHeapSize < min_code_cache_size){ 2524 jio_fprintf(defaultStream::error_stream(), 2525 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, 2526 min_code_cache_size/K); 2527 status = false; 2528 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) 2529 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 2530 jio_fprintf(defaultStream::error_stream(), 2531 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 2532 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 2533 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 2534 status = false; 2535 } 2536 2537 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { 2538 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); 2539 } 2540 2541 return status; 2542 } 2543 2544 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2545 const char* option_type) { 2546 if (ignore) return false; 2547 2548 const char* spacer = " "; 2549 if (option_type == NULL) { 2550 option_type = ++spacer; // Set both to the empty string. 2551 } 2552 2553 if (os::obsolete_option(option)) { 2554 jio_fprintf(defaultStream::error_stream(), 2555 "Obsolete %s%soption: %s\n", option_type, spacer, 2556 option->optionString); 2557 return false; 2558 } else { 2559 jio_fprintf(defaultStream::error_stream(), 2560 "Unrecognized %s%soption: %s\n", option_type, spacer, 2561 option->optionString); 2562 return true; 2563 } 2564 } 2565 2566 static const char* user_assertion_options[] = { 2567 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2568 }; 2569 2570 static const char* system_assertion_options[] = { 2571 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2572 }; 2573 2574 bool Arguments::parse_uintx(const char* value, 2575 uintx* uintx_arg, 2576 uintx min_size) { 2577 2578 // Check the sign first since atomull() parses only unsigned values. 2579 bool value_is_positive = !(*value == '-'); 2580 2581 if (value_is_positive) { 2582 julong n; 2583 bool good_return = atomull(value, &n); 2584 if (good_return) { 2585 bool above_minimum = n >= min_size; 2586 bool value_is_too_large = n > max_uintx; 2587 2588 if (above_minimum && !value_is_too_large) { 2589 *uintx_arg = n; 2590 return true; 2591 } 2592 } 2593 } 2594 return false; 2595 } 2596 2597 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2598 julong* long_arg, 2599 julong min_size) { 2600 if (!atomull(s, long_arg)) return arg_unreadable; 2601 return check_memory_size(*long_arg, min_size); 2602 } 2603 2604 // Parse JavaVMInitArgs structure 2605 2606 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 2607 const JavaVMInitArgs *java_options_args, 2608 const JavaVMInitArgs *cmd_line_args) { 2609 // For components of the system classpath. 2610 SysClassPath scp(Arguments::get_sysclasspath()); 2611 bool scp_assembly_required = false; 2612 2613 // Save default settings for some mode flags 2614 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2615 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2616 Arguments::_ClipInlining = ClipInlining; 2617 Arguments::_BackgroundCompilation = BackgroundCompilation; 2618 if (TieredCompilation) { 2619 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 2620 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 2621 } 2622 2623 // Setup flags for mixed which is the default 2624 set_mode_flags(_mixed); 2625 2626 // Parse args structure generated from JAVA_TOOL_OPTIONS environment 2627 // variable (if present). 2628 jint result = parse_each_vm_init_arg( 2629 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR); 2630 if (result != JNI_OK) { 2631 return result; 2632 } 2633 2634 // Parse args structure generated from the command line flags. 2635 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required, 2636 Flag::COMMAND_LINE); 2637 if (result != JNI_OK) { 2638 return result; 2639 } 2640 2641 // Parse args structure generated from the _JAVA_OPTIONS environment 2642 // variable (if present) (mimics classic VM) 2643 result = parse_each_vm_init_arg( 2644 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR); 2645 if (result != JNI_OK) { 2646 return result; 2647 } 2648 2649 // Do final processing now that all arguments have been parsed 2650 result = finalize_vm_init_args(&scp, scp_assembly_required); 2651 if (result != JNI_OK) { 2652 return result; 2653 } 2654 2655 return JNI_OK; 2656 } 2657 2658 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2659 // represents a valid JDWP agent. is_path==true denotes that we 2660 // are dealing with -agentpath (case where name is a path), otherwise with 2661 // -agentlib 2662 bool valid_jdwp_agent(char *name, bool is_path) { 2663 char *_name; 2664 const char *_jdwp = "jdwp"; 2665 size_t _len_jdwp, _len_prefix; 2666 2667 if (is_path) { 2668 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2669 return false; 2670 } 2671 2672 _name++; // skip past last path separator 2673 _len_prefix = strlen(JNI_LIB_PREFIX); 2674 2675 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2676 return false; 2677 } 2678 2679 _name += _len_prefix; 2680 _len_jdwp = strlen(_jdwp); 2681 2682 if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2683 _name += _len_jdwp; 2684 } 2685 else { 2686 return false; 2687 } 2688 2689 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2690 return false; 2691 } 2692 2693 return true; 2694 } 2695 2696 if (strcmp(name, _jdwp) == 0) { 2697 return true; 2698 } 2699 2700 return false; 2701 } 2702 2703 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 2704 SysClassPath* scp_p, 2705 bool* scp_assembly_required_p, 2706 Flag::Flags origin) { 2707 // Remaining part of option string 2708 const char* tail; 2709 2710 // iterate over arguments 2711 for (int index = 0; index < args->nOptions; index++) { 2712 bool is_absolute_path = false; // for -agentpath vs -agentlib 2713 2714 const JavaVMOption* option = args->options + index; 2715 2716 if (!match_option(option, "-Djava.class.path", &tail) && 2717 !match_option(option, "-Dsun.java.command", &tail) && 2718 !match_option(option, "-Dsun.java.launcher", &tail)) { 2719 2720 // add all jvm options to the jvm_args string. This string 2721 // is used later to set the java.vm.args PerfData string constant. 2722 // the -Djava.class.path and the -Dsun.java.command options are 2723 // omitted from jvm_args string as each have their own PerfData 2724 // string constant object. 2725 build_jvm_args(option->optionString); 2726 } 2727 2728 // -verbose:[class/gc/jni] 2729 if (match_option(option, "-verbose", &tail)) { 2730 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2731 if (FLAG_SET_CMDLINE(bool, TraceClassLoading, true) != Flag::SUCCESS) { 2732 return JNI_EINVAL; 2733 } 2734 if (FLAG_SET_CMDLINE(bool, TraceClassUnloading, true) != Flag::SUCCESS) { 2735 return JNI_EINVAL; 2736 } 2737 } else if (!strcmp(tail, ":gc")) { 2738 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) { 2739 return JNI_EINVAL; 2740 } 2741 } else if (!strcmp(tail, ":jni")) { 2742 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) { 2743 return JNI_EINVAL; 2744 } 2745 } 2746 // -da / -ea / -disableassertions / -enableassertions 2747 // These accept an optional class/package name separated by a colon, e.g., 2748 // -da:java.lang.Thread. 2749 } else if (match_option(option, user_assertion_options, &tail, true)) { 2750 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2751 if (*tail == '\0') { 2752 JavaAssertions::setUserClassDefault(enable); 2753 } else { 2754 assert(*tail == ':', "bogus match by match_option()"); 2755 JavaAssertions::addOption(tail + 1, enable); 2756 } 2757 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2758 } else if (match_option(option, system_assertion_options, &tail, false)) { 2759 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2760 JavaAssertions::setSystemClassDefault(enable); 2761 // -bootclasspath: 2762 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2763 scp_p->reset_path(tail); 2764 *scp_assembly_required_p = true; 2765 // -bootclasspath/a: 2766 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2767 scp_p->add_suffix(tail); 2768 *scp_assembly_required_p = true; 2769 // -bootclasspath/p: 2770 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2771 scp_p->add_prefix(tail); 2772 *scp_assembly_required_p = true; 2773 // -Xrun 2774 } else if (match_option(option, "-Xrun", &tail)) { 2775 if (tail != NULL) { 2776 const char* pos = strchr(tail, ':'); 2777 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2778 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2779 name[len] = '\0'; 2780 2781 char *options = NULL; 2782 if(pos != NULL) { 2783 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2784 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2); 2785 } 2786 #if !INCLUDE_JVMTI 2787 if (strcmp(name, "jdwp") == 0) { 2788 jio_fprintf(defaultStream::error_stream(), 2789 "Debugging agents are not supported in this VM\n"); 2790 return JNI_ERR; 2791 } 2792 #endif // !INCLUDE_JVMTI 2793 add_init_library(name, options); 2794 } 2795 // -agentlib and -agentpath 2796 } else if (match_option(option, "-agentlib:", &tail) || 2797 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2798 if(tail != NULL) { 2799 const char* pos = strchr(tail, '='); 2800 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2801 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2802 name[len] = '\0'; 2803 2804 char *options = NULL; 2805 if(pos != NULL) { 2806 options = os::strdup_check_oom(pos + 1, mtInternal); 2807 } 2808 #if !INCLUDE_JVMTI 2809 if (valid_jdwp_agent(name, is_absolute_path)) { 2810 jio_fprintf(defaultStream::error_stream(), 2811 "Debugging agents are not supported in this VM\n"); 2812 return JNI_ERR; 2813 } 2814 #endif // !INCLUDE_JVMTI 2815 add_init_agent(name, options, is_absolute_path); 2816 } 2817 // -javaagent 2818 } else if (match_option(option, "-javaagent:", &tail)) { 2819 #if !INCLUDE_JVMTI 2820 jio_fprintf(defaultStream::error_stream(), 2821 "Instrumentation agents are not supported in this VM\n"); 2822 return JNI_ERR; 2823 #else 2824 if(tail != NULL) { 2825 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail); 2826 add_init_agent("instrument", options, false); 2827 } 2828 #endif // !INCLUDE_JVMTI 2829 // -Xnoclassgc 2830 } else if (match_option(option, "-Xnoclassgc")) { 2831 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) { 2832 return JNI_EINVAL; 2833 } 2834 // -Xconcgc 2835 } else if (match_option(option, "-Xconcgc")) { 2836 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) { 2837 return JNI_EINVAL; 2838 } 2839 // -Xnoconcgc 2840 } else if (match_option(option, "-Xnoconcgc")) { 2841 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) { 2842 return JNI_EINVAL; 2843 } 2844 // -Xbatch 2845 } else if (match_option(option, "-Xbatch")) { 2846 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 2847 return JNI_EINVAL; 2848 } 2849 // -Xmn for compatibility with other JVM vendors 2850 } else if (match_option(option, "-Xmn", &tail)) { 2851 julong long_initial_young_size = 0; 2852 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2853 if (errcode != arg_in_range) { 2854 jio_fprintf(defaultStream::error_stream(), 2855 "Invalid initial young generation size: %s\n", option->optionString); 2856 describe_range_error(errcode); 2857 return JNI_EINVAL; 2858 } 2859 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2860 return JNI_EINVAL; 2861 } 2862 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2863 return JNI_EINVAL; 2864 } 2865 // -Xms 2866 } else if (match_option(option, "-Xms", &tail)) { 2867 julong long_initial_heap_size = 0; 2868 // an initial heap size of 0 means automatically determine 2869 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2870 if (errcode != arg_in_range) { 2871 jio_fprintf(defaultStream::error_stream(), 2872 "Invalid initial heap size: %s\n", option->optionString); 2873 describe_range_error(errcode); 2874 return JNI_EINVAL; 2875 } 2876 set_min_heap_size((size_t)long_initial_heap_size); 2877 // Currently the minimum size and the initial heap sizes are the same. 2878 // Can be overridden with -XX:InitialHeapSize. 2879 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) { 2880 return JNI_EINVAL; 2881 } 2882 // -Xmx 2883 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2884 julong long_max_heap_size = 0; 2885 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2886 if (errcode != arg_in_range) { 2887 jio_fprintf(defaultStream::error_stream(), 2888 "Invalid maximum heap size: %s\n", option->optionString); 2889 describe_range_error(errcode); 2890 return JNI_EINVAL; 2891 } 2892 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) { 2893 return JNI_EINVAL; 2894 } 2895 // Xmaxf 2896 } else if (match_option(option, "-Xmaxf", &tail)) { 2897 char* err; 2898 int maxf = (int)(strtod(tail, &err) * 100); 2899 if (*err != '\0' || *tail == '\0') { 2900 jio_fprintf(defaultStream::error_stream(), 2901 "Bad max heap free percentage size: %s\n", 2902 option->optionString); 2903 return JNI_EINVAL; 2904 } else { 2905 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) { 2906 return JNI_EINVAL; 2907 } 2908 } 2909 // Xminf 2910 } else if (match_option(option, "-Xminf", &tail)) { 2911 char* err; 2912 int minf = (int)(strtod(tail, &err) * 100); 2913 if (*err != '\0' || *tail == '\0') { 2914 jio_fprintf(defaultStream::error_stream(), 2915 "Bad min heap free percentage size: %s\n", 2916 option->optionString); 2917 return JNI_EINVAL; 2918 } else { 2919 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) { 2920 return JNI_EINVAL; 2921 } 2922 } 2923 // -Xss 2924 } else if (match_option(option, "-Xss", &tail)) { 2925 julong long_ThreadStackSize = 0; 2926 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 2927 if (errcode != arg_in_range) { 2928 jio_fprintf(defaultStream::error_stream(), 2929 "Invalid thread stack size: %s\n", option->optionString); 2930 describe_range_error(errcode); 2931 return JNI_EINVAL; 2932 } 2933 // Internally track ThreadStackSize in units of 1024 bytes. 2934 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, 2935 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) { 2936 return JNI_EINVAL; 2937 } 2938 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads 2939 } else if (match_option(option, "-Xoss", &tail) || 2940 match_option(option, "-Xsqnopause") || 2941 match_option(option, "-Xoptimize") || 2942 match_option(option, "-Xboundthreads")) { 2943 // All these options are deprecated in JDK 9 and will be removed in a future release 2944 char version[256]; 2945 JDK_Version::jdk(9).to_string(version, sizeof(version)); 2946 warning("Ignoring option %s; support was removed in %s", option->optionString, version); 2947 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) { 2948 julong long_CodeCacheExpansionSize = 0; 2949 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size()); 2950 if (errcode != arg_in_range) { 2951 jio_fprintf(defaultStream::error_stream(), 2952 "Invalid argument: %s. Must be at least %luK.\n", option->optionString, 2953 os::vm_page_size()/K); 2954 return JNI_EINVAL; 2955 } 2956 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) { 2957 return JNI_EINVAL; 2958 } 2959 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2960 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2961 julong long_ReservedCodeCacheSize = 0; 2962 2963 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2964 if (errcode != arg_in_range) { 2965 jio_fprintf(defaultStream::error_stream(), 2966 "Invalid maximum code cache size: %s.\n", option->optionString); 2967 return JNI_EINVAL; 2968 } 2969 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) { 2970 return JNI_EINVAL; 2971 } 2972 // -XX:NonNMethodCodeHeapSize= 2973 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) { 2974 julong long_NonNMethodCodeHeapSize = 0; 2975 2976 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1); 2977 if (errcode != arg_in_range) { 2978 jio_fprintf(defaultStream::error_stream(), 2979 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString); 2980 return JNI_EINVAL; 2981 } 2982 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) { 2983 return JNI_EINVAL; 2984 } 2985 // -XX:ProfiledCodeHeapSize= 2986 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) { 2987 julong long_ProfiledCodeHeapSize = 0; 2988 2989 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1); 2990 if (errcode != arg_in_range) { 2991 jio_fprintf(defaultStream::error_stream(), 2992 "Invalid maximum profiled code heap size: %s.\n", option->optionString); 2993 return JNI_EINVAL; 2994 } 2995 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) { 2996 return JNI_EINVAL; 2997 } 2998 // -XX:NonProfiledCodeHeapSizee= 2999 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) { 3000 julong long_NonProfiledCodeHeapSize = 0; 3001 3002 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1); 3003 if (errcode != arg_in_range) { 3004 jio_fprintf(defaultStream::error_stream(), 3005 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString); 3006 return JNI_EINVAL; 3007 } 3008 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) { 3009 return JNI_EINVAL; 3010 } 3011 // -green 3012 } else if (match_option(option, "-green")) { 3013 jio_fprintf(defaultStream::error_stream(), 3014 "Green threads support not available\n"); 3015 return JNI_EINVAL; 3016 // -native 3017 } else if (match_option(option, "-native")) { 3018 // HotSpot always uses native threads, ignore silently for compatibility 3019 // -Xrs 3020 } else if (match_option(option, "-Xrs")) { 3021 // Classic/EVM option, new functionality 3022 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) { 3023 return JNI_EINVAL; 3024 } 3025 } else if (match_option(option, "-Xusealtsigs")) { 3026 // change default internal VM signals used - lower case for back compat 3027 if (FLAG_SET_CMDLINE(bool, UseAltSigs, true) != Flag::SUCCESS) { 3028 return JNI_EINVAL; 3029 } 3030 // -Xprof 3031 } else if (match_option(option, "-Xprof")) { 3032 #if INCLUDE_FPROF 3033 _has_profile = true; 3034 #else // INCLUDE_FPROF 3035 jio_fprintf(defaultStream::error_stream(), 3036 "Flat profiling is not supported in this VM.\n"); 3037 return JNI_ERR; 3038 #endif // INCLUDE_FPROF 3039 // -Xconcurrentio 3040 } else if (match_option(option, "-Xconcurrentio")) { 3041 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) { 3042 return JNI_EINVAL; 3043 } 3044 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 3045 return JNI_EINVAL; 3046 } 3047 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) { 3048 return JNI_EINVAL; 3049 } 3050 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) { 3051 return JNI_EINVAL; 3052 } 3053 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation 3054 return JNI_EINVAL; 3055 } 3056 3057 // -Xinternalversion 3058 } else if (match_option(option, "-Xinternalversion")) { 3059 jio_fprintf(defaultStream::output_stream(), "%s\n", 3060 VM_Version::internal_vm_info_string()); 3061 vm_exit(0); 3062 #ifndef PRODUCT 3063 // -Xprintflags 3064 } else if (match_option(option, "-Xprintflags")) { 3065 CommandLineFlags::printFlags(tty, false); 3066 vm_exit(0); 3067 #endif 3068 // -D 3069 } else if (match_option(option, "-D", &tail)) { 3070 const char* value; 3071 if (match_option(option, "-Djava.endorsed.dirs=", &value) && 3072 *value!= '\0' && strcmp(value, "\"\"") != 0) { 3073 // abort if -Djava.endorsed.dirs is set 3074 jio_fprintf(defaultStream::output_stream(), 3075 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n" 3076 "in modular form will be supported via the concept of upgradeable modules.\n", value); 3077 return JNI_EINVAL; 3078 } 3079 if (match_option(option, "-Djava.ext.dirs=", &value) && 3080 *value != '\0' && strcmp(value, "\"\"") != 0) { 3081 // abort if -Djava.ext.dirs is set 3082 jio_fprintf(defaultStream::output_stream(), 3083 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value); 3084 return JNI_EINVAL; 3085 } 3086 3087 if (!add_property(tail)) { 3088 return JNI_ENOMEM; 3089 } 3090 // Out of the box management support 3091 if (match_option(option, "-Dcom.sun.management", &tail)) { 3092 #if INCLUDE_MANAGEMENT 3093 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) { 3094 return JNI_EINVAL; 3095 } 3096 #else 3097 jio_fprintf(defaultStream::output_stream(), 3098 "-Dcom.sun.management is not supported in this VM.\n"); 3099 return JNI_ERR; 3100 #endif 3101 } 3102 // -Xint 3103 } else if (match_option(option, "-Xint")) { 3104 set_mode_flags(_int); 3105 // -Xmixed 3106 } else if (match_option(option, "-Xmixed")) { 3107 set_mode_flags(_mixed); 3108 // -Xcomp 3109 } else if (match_option(option, "-Xcomp")) { 3110 // for testing the compiler; turn off all flags that inhibit compilation 3111 set_mode_flags(_comp); 3112 // -Xshare:dump 3113 } else if (match_option(option, "-Xshare:dump")) { 3114 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) { 3115 return JNI_EINVAL; 3116 } 3117 set_mode_flags(_int); // Prevent compilation, which creates objects 3118 // -Xshare:on 3119 } else if (match_option(option, "-Xshare:on")) { 3120 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3121 return JNI_EINVAL; 3122 } 3123 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 3124 return JNI_EINVAL; 3125 } 3126 // -Xshare:auto 3127 } else if (match_option(option, "-Xshare:auto")) { 3128 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3129 return JNI_EINVAL; 3130 } 3131 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 3132 return JNI_EINVAL; 3133 } 3134 // -Xshare:off 3135 } else if (match_option(option, "-Xshare:off")) { 3136 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) { 3137 return JNI_EINVAL; 3138 } 3139 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 3140 return JNI_EINVAL; 3141 } 3142 // -Xverify 3143 } else if (match_option(option, "-Xverify", &tail)) { 3144 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 3145 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) { 3146 return JNI_EINVAL; 3147 } 3148 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 3149 return JNI_EINVAL; 3150 } 3151 } else if (strcmp(tail, ":remote") == 0) { 3152 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 3153 return JNI_EINVAL; 3154 } 3155 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 3156 return JNI_EINVAL; 3157 } 3158 } else if (strcmp(tail, ":none") == 0) { 3159 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 3160 return JNI_EINVAL; 3161 } 3162 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) { 3163 return JNI_EINVAL; 3164 } 3165 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 3166 return JNI_EINVAL; 3167 } 3168 // -Xdebug 3169 } else if (match_option(option, "-Xdebug")) { 3170 // note this flag has been used, then ignore 3171 set_xdebug_mode(true); 3172 // -Xnoagent 3173 } else if (match_option(option, "-Xnoagent")) { 3174 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 3175 } else if (match_option(option, "-Xloggc:", &tail)) { 3176 // Redirect GC output to the file. -Xloggc:<filename> 3177 // ostream_init_log(), when called will use this filename 3178 // to initialize a fileStream. 3179 _gc_log_filename = os::strdup_check_oom(tail); 3180 if (!is_filename_valid(_gc_log_filename)) { 3181 jio_fprintf(defaultStream::output_stream(), 3182 "Invalid file name for use with -Xloggc: Filename can only contain the " 3183 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n" 3184 "Note %%p or %%t can only be used once\n", _gc_log_filename); 3185 return JNI_EINVAL; 3186 } 3187 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) { 3188 return JNI_EINVAL; 3189 } 3190 if (FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true) != Flag::SUCCESS) { 3191 return JNI_EINVAL; 3192 } 3193 // JNI hooks 3194 } else if (match_option(option, "-Xcheck", &tail)) { 3195 if (!strcmp(tail, ":jni")) { 3196 #if !INCLUDE_JNI_CHECK 3197 warning("JNI CHECKING is not supported in this VM"); 3198 #else 3199 CheckJNICalls = true; 3200 #endif // INCLUDE_JNI_CHECK 3201 } else if (is_bad_option(option, args->ignoreUnrecognized, 3202 "check")) { 3203 return JNI_EINVAL; 3204 } 3205 } else if (match_option(option, "vfprintf")) { 3206 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 3207 } else if (match_option(option, "exit")) { 3208 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 3209 } else if (match_option(option, "abort")) { 3210 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 3211 // -XX:+AggressiveHeap 3212 } else if (match_option(option, "-XX:+AggressiveHeap")) { 3213 jint result = set_aggressive_heap_flags(); 3214 if (result != JNI_OK) { 3215 return result; 3216 } 3217 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 3218 // and the last option wins. 3219 } else if (match_option(option, "-XX:+NeverTenure")) { 3220 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) { 3221 return JNI_EINVAL; 3222 } 3223 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3224 return JNI_EINVAL; 3225 } 3226 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) { 3227 return JNI_EINVAL; 3228 } 3229 } else if (match_option(option, "-XX:+AlwaysTenure")) { 3230 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3231 return JNI_EINVAL; 3232 } 3233 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3234 return JNI_EINVAL; 3235 } 3236 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) { 3237 return JNI_EINVAL; 3238 } 3239 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 3240 uintx max_tenuring_thresh = 0; 3241 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) { 3242 jio_fprintf(defaultStream::error_stream(), 3243 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail); 3244 return JNI_EINVAL; 3245 } 3246 3247 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) { 3248 return JNI_EINVAL; 3249 } 3250 3251 if (MaxTenuringThreshold == 0) { 3252 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3253 return JNI_EINVAL; 3254 } 3255 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3256 return JNI_EINVAL; 3257 } 3258 } else { 3259 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3260 return JNI_EINVAL; 3261 } 3262 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3263 return JNI_EINVAL; 3264 } 3265 } 3266 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) { 3267 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) { 3268 return JNI_EINVAL; 3269 } 3270 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) { 3271 return JNI_EINVAL; 3272 } 3273 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) { 3274 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) { 3275 return JNI_EINVAL; 3276 } 3277 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) { 3278 return JNI_EINVAL; 3279 } 3280 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) { 3281 #if defined(DTRACE_ENABLED) 3282 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) { 3283 return JNI_EINVAL; 3284 } 3285 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) { 3286 return JNI_EINVAL; 3287 } 3288 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) { 3289 return JNI_EINVAL; 3290 } 3291 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) { 3292 return JNI_EINVAL; 3293 } 3294 #else // defined(DTRACE_ENABLED) 3295 jio_fprintf(defaultStream::error_stream(), 3296 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 3297 return JNI_EINVAL; 3298 #endif // defined(DTRACE_ENABLED) 3299 #ifdef ASSERT 3300 } else if (match_option(option, "-XX:+FullGCALot")) { 3301 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) { 3302 return JNI_EINVAL; 3303 } 3304 // disable scavenge before parallel mark-compact 3305 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 3306 return JNI_EINVAL; 3307 } 3308 #endif 3309 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) { 3310 julong max_direct_memory_size = 0; 3311 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0); 3312 if (errcode != arg_in_range) { 3313 jio_fprintf(defaultStream::error_stream(), 3314 "Invalid maximum direct memory size: %s\n", 3315 option->optionString); 3316 describe_range_error(errcode); 3317 return JNI_EINVAL; 3318 } 3319 if (FLAG_SET_CMDLINE(size_t, MaxDirectMemorySize, max_direct_memory_size) != Flag::SUCCESS) { 3320 return JNI_EINVAL; 3321 } 3322 #if !INCLUDE_MANAGEMENT 3323 } else if (match_option(option, "-XX:+ManagementServer")) { 3324 jio_fprintf(defaultStream::error_stream(), 3325 "ManagementServer is not supported in this VM.\n"); 3326 return JNI_ERR; 3327 #endif // INCLUDE_MANAGEMENT 3328 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 3329 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have 3330 // already been handled 3331 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) && 3332 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) { 3333 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 3334 return JNI_EINVAL; 3335 } 3336 } 3337 // Unknown option 3338 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 3339 return JNI_ERR; 3340 } 3341 } 3342 3343 // PrintSharedArchiveAndExit will turn on 3344 // -Xshare:on 3345 // -XX:+TraceClassPaths 3346 if (PrintSharedArchiveAndExit) { 3347 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3348 return JNI_EINVAL; 3349 } 3350 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 3351 return JNI_EINVAL; 3352 } 3353 if (FLAG_SET_CMDLINE(bool, TraceClassPaths, true) != Flag::SUCCESS) { 3354 return JNI_EINVAL; 3355 } 3356 } 3357 3358 // Change the default value for flags which have different default values 3359 // when working with older JDKs. 3360 #ifdef LINUX 3361 if (JDK_Version::current().compare_major(6) <= 0 && 3362 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 3363 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 3364 } 3365 #endif // LINUX 3366 fix_appclasspath(); 3367 return JNI_OK; 3368 } 3369 3370 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3371 // 3372 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3373 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3374 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3375 // path is treated as the current directory. 3376 // 3377 // This causes problems with CDS, which requires that all directories specified in the classpath 3378 // must be empty. In most cases, applications do NOT want to load classes from the current 3379 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3380 // scripts compatible with CDS. 3381 void Arguments::fix_appclasspath() { 3382 if (IgnoreEmptyClassPaths) { 3383 const char separator = *os::path_separator(); 3384 const char* src = _java_class_path->value(); 3385 3386 // skip over all the leading empty paths 3387 while (*src == separator) { 3388 src ++; 3389 } 3390 3391 char* copy = os::strdup_check_oom(src, mtInternal); 3392 3393 // trim all trailing empty paths 3394 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3395 *tail = '\0'; 3396 } 3397 3398 char from[3] = {separator, separator, '\0'}; 3399 char to [2] = {separator, '\0'}; 3400 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3401 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3402 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3403 } 3404 3405 _java_class_path->set_value(copy); 3406 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3407 } 3408 3409 if (!PrintSharedArchiveAndExit) { 3410 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value()); 3411 } 3412 } 3413 3414 static bool has_jar_files(const char* directory) { 3415 DIR* dir = os::opendir(directory); 3416 if (dir == NULL) return false; 3417 3418 struct dirent *entry; 3419 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal); 3420 bool hasJarFile = false; 3421 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 3422 const char* name = entry->d_name; 3423 const char* ext = name + strlen(name) - 4; 3424 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0); 3425 } 3426 FREE_C_HEAP_ARRAY(char, dbuf); 3427 os::closedir(dir); 3428 return hasJarFile ; 3429 } 3430 3431 static int check_non_empty_dirs(const char* path) { 3432 const char separator = *os::path_separator(); 3433 const char* const end = path + strlen(path); 3434 int nonEmptyDirs = 0; 3435 while (path < end) { 3436 const char* tmp_end = strchr(path, separator); 3437 if (tmp_end == NULL) { 3438 if (has_jar_files(path)) { 3439 nonEmptyDirs++; 3440 jio_fprintf(defaultStream::output_stream(), 3441 "Non-empty directory: %s\n", path); 3442 } 3443 path = end; 3444 } else { 3445 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal); 3446 memcpy(dirpath, path, tmp_end - path); 3447 dirpath[tmp_end - path] = '\0'; 3448 if (has_jar_files(dirpath)) { 3449 nonEmptyDirs++; 3450 jio_fprintf(defaultStream::output_stream(), 3451 "Non-empty directory: %s\n", dirpath); 3452 } 3453 FREE_C_HEAP_ARRAY(char, dirpath); 3454 path = tmp_end + 1; 3455 } 3456 } 3457 return nonEmptyDirs; 3458 } 3459 3460 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 3461 // check if the default lib/endorsed directory exists; if so, error 3462 char path[JVM_MAXPATHLEN]; 3463 const char* fileSep = os::file_separator(); 3464 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); 3465 3466 if (CheckEndorsedAndExtDirs) { 3467 int nonEmptyDirs = 0; 3468 // check endorsed directory 3469 nonEmptyDirs += check_non_empty_dirs(path); 3470 // check the extension directories 3471 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs()); 3472 if (nonEmptyDirs > 0) { 3473 return JNI_ERR; 3474 } 3475 } 3476 3477 DIR* dir = os::opendir(path); 3478 if (dir != NULL) { 3479 jio_fprintf(defaultStream::output_stream(), 3480 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n" 3481 "in modular form will be supported via the concept of upgradeable modules.\n"); 3482 os::closedir(dir); 3483 return JNI_ERR; 3484 } 3485 3486 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); 3487 dir = os::opendir(path); 3488 if (dir != NULL) { 3489 jio_fprintf(defaultStream::output_stream(), 3490 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; " 3491 "Use -classpath instead.\n."); 3492 os::closedir(dir); 3493 return JNI_ERR; 3494 } 3495 3496 if (scp_assembly_required) { 3497 // Assemble the bootclasspath elements into the final path. 3498 char *combined_path = scp_p->combined_path(); 3499 Arguments::set_sysclasspath(combined_path); 3500 FREE_C_HEAP_ARRAY(char, combined_path); 3501 } 3502 3503 // This must be done after all arguments have been processed. 3504 // java_compiler() true means set to "NONE" or empty. 3505 if (java_compiler() && !xdebug_mode()) { 3506 // For backwards compatibility, we switch to interpreted mode if 3507 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3508 // not specified. 3509 set_mode_flags(_int); 3510 } 3511 3512 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode), 3513 // but like -Xint, leave compilation thresholds unaffected. 3514 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well. 3515 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) { 3516 set_mode_flags(_int); 3517 } 3518 3519 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3520 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3521 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3522 } 3523 3524 #ifndef COMPILER2 3525 // Don't degrade server performance for footprint 3526 if (FLAG_IS_DEFAULT(UseLargePages) && 3527 MaxHeapSize < LargePageHeapSizeThreshold) { 3528 // No need for large granularity pages w/small heaps. 3529 // Note that large pages are enabled/disabled for both the 3530 // Java heap and the code cache. 3531 FLAG_SET_DEFAULT(UseLargePages, false); 3532 } 3533 3534 #else 3535 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 3536 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 3537 } 3538 #endif 3539 3540 #ifndef TIERED 3541 // Tiered compilation is undefined. 3542 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation"); 3543 #endif 3544 3545 // If we are running in a headless jre, force java.awt.headless property 3546 // to be true unless the property has already been set. 3547 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. 3548 if (os::is_headless_jre()) { 3549 const char* headless = Arguments::get_property("java.awt.headless"); 3550 if (headless == NULL) { 3551 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS"); 3552 if (headless_env == NULL) { 3553 if (!add_property("java.awt.headless=true")) { 3554 return JNI_ENOMEM; 3555 } 3556 } else { 3557 char buffer[256]; 3558 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env); 3559 if (!add_property(buffer)) { 3560 return JNI_ENOMEM; 3561 } 3562 } 3563 } 3564 } 3565 3566 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) { 3567 // CMS can only be used with ParNew 3568 FLAG_SET_ERGO(bool, UseParNewGC, true); 3569 } 3570 3571 if (!check_vm_args_consistency()) { 3572 return JNI_ERR; 3573 } 3574 3575 return JNI_OK; 3576 } 3577 3578 // Helper class for controlling the lifetime of JavaVMInitArgs 3579 // objects. The contents of the JavaVMInitArgs are guaranteed to be 3580 // deleted on the destruction of the ScopedVMInitArgs object. 3581 class ScopedVMInitArgs : public StackObj { 3582 private: 3583 JavaVMInitArgs _args; 3584 bool _is_set; 3585 3586 public: 3587 ScopedVMInitArgs() { 3588 _args.version = JNI_VERSION_1_2; 3589 _args.nOptions = 0; 3590 _args.options = NULL; 3591 _args.ignoreUnrecognized = false; 3592 _is_set = false; 3593 } 3594 3595 // Populates the JavaVMInitArgs object represented by this 3596 // ScopedVMInitArgs object with the arguments in options. The 3597 // allocated memory is deleted by the destructor. If this method 3598 // returns anything other than JNI_OK, then this object is in a 3599 // partially constructed state, and should be abandoned. 3600 jint set_args(GrowableArray<JavaVMOption>* options) { 3601 _is_set = true; 3602 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL( 3603 JavaVMOption, options->length(), mtInternal); 3604 if (options_arr == NULL) { 3605 return JNI_ENOMEM; 3606 } 3607 _args.options = options_arr; 3608 3609 for (int i = 0; i < options->length(); i++) { 3610 options_arr[i] = options->at(i); 3611 options_arr[i].optionString = os::strdup(options_arr[i].optionString); 3612 if (options_arr[i].optionString == NULL) { 3613 // Rely on the destructor to do cleanup. 3614 _args.nOptions = i; 3615 return JNI_ENOMEM; 3616 } 3617 } 3618 3619 _args.nOptions = options->length(); 3620 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3621 return JNI_OK; 3622 } 3623 3624 JavaVMInitArgs* get() { return &_args; } 3625 bool is_set() { return _is_set; } 3626 3627 ~ScopedVMInitArgs() { 3628 if (_args.options == NULL) return; 3629 for (int i = 0; i < _args.nOptions; i++) { 3630 os::free(_args.options[i].optionString); 3631 } 3632 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options); 3633 } 3634 3635 // Insert options into this option list, to replace option at 3636 // vm_options_file_pos (-XX:VMOptionsFile) 3637 jint insert(const JavaVMInitArgs* args, 3638 const JavaVMInitArgs* args_to_insert, 3639 const int vm_options_file_pos) { 3640 assert(_args.options == NULL, "shouldn't be set yet"); 3641 assert(args_to_insert->nOptions != 0, "there should be args to insert"); 3642 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set"); 3643 3644 int length = args->nOptions + args_to_insert->nOptions - 1; 3645 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) 3646 GrowableArray<JavaVMOption>(length, true); // Construct new option array 3647 for (int i = 0; i < args->nOptions; i++) { 3648 if (i == vm_options_file_pos) { 3649 // insert the new options starting at the same place as the 3650 // -XX:VMOptionsFile option 3651 for (int j = 0; j < args_to_insert->nOptions; j++) { 3652 options->push(args_to_insert->options[j]); 3653 } 3654 } else { 3655 options->push(args->options[i]); 3656 } 3657 } 3658 // make into options array 3659 jint result = set_args(options); 3660 delete options; 3661 return result; 3662 } 3663 }; 3664 3665 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) { 3666 return parse_options_environment_variable("_JAVA_OPTIONS", args); 3667 } 3668 3669 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) { 3670 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args); 3671 } 3672 3673 jint Arguments::parse_options_environment_variable(const char* name, 3674 ScopedVMInitArgs* vm_args) { 3675 char *buffer = ::getenv(name); 3676 3677 // Don't check this environment variable if user has special privileges 3678 // (e.g. unix su command). 3679 if (buffer == NULL || os::have_special_privileges()) { 3680 return JNI_OK; 3681 } 3682 3683 if ((buffer = os::strdup(buffer)) == NULL) { 3684 return JNI_ENOMEM; 3685 } 3686 3687 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args); 3688 3689 os::free(buffer); 3690 return retcode; 3691 } 3692 3693 const int OPTION_BUFFER_SIZE = 1024; 3694 3695 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) { 3696 // read file into buffer 3697 int fd = ::open(file_name, O_RDONLY); 3698 if (fd < 0) { 3699 jio_fprintf(defaultStream::error_stream(), 3700 "Could not open options file '%s'\n", 3701 file_name); 3702 return JNI_ERR; 3703 } 3704 3705 // '+ 1' for NULL termination even with max bytes 3706 int bytes_alloc = OPTION_BUFFER_SIZE + 1; 3707 3708 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtInternal); 3709 if (NULL == buf) { 3710 jio_fprintf(defaultStream::error_stream(), 3711 "Could not allocate read buffer for options file parse\n"); 3712 os::close(fd); 3713 return JNI_ENOMEM; 3714 } 3715 3716 memset(buf, 0, (unsigned)bytes_alloc); 3717 3718 // Fill buffer 3719 // Use ::read() instead of os::read because os::read() 3720 // might do a thread state transition 3721 // and it is too early for that here 3722 3723 int bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc); 3724 os::close(fd); 3725 if (bytes_read < 0) { 3726 FREE_C_HEAP_ARRAY(char, buf); 3727 jio_fprintf(defaultStream::error_stream(), 3728 "Could not read options file '%s'\n", file_name); 3729 return JNI_ERR; 3730 } 3731 3732 if (bytes_read == 0) { 3733 // tell caller there is no option data and that is ok 3734 FREE_C_HEAP_ARRAY(char, buf); 3735 return JNI_OK; 3736 } 3737 3738 // file is larger than OPTION_BUFFER_SIZE 3739 if (bytes_read > bytes_alloc - 1) { 3740 FREE_C_HEAP_ARRAY(char, buf); 3741 jio_fprintf(defaultStream::error_stream(), 3742 "Options file '%s' is larger than %d bytes.\n", 3743 file_name, bytes_alloc - 1); 3744 return JNI_EINVAL; 3745 } 3746 3747 int retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args); 3748 3749 FREE_C_HEAP_ARRAY(char, buf); 3750 return retcode; 3751 } 3752 3753 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) { 3754 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array 3755 3756 // some pointers to help with parsing 3757 char *buffer_end = buffer + buf_len; 3758 char *opt_hd = buffer; 3759 char *wrt = buffer; 3760 char *rd = buffer; 3761 3762 // parse all options 3763 while (rd < buffer_end) { 3764 // skip leading white space from the input string 3765 while (rd < buffer_end && isspace(*rd)) { 3766 rd++; 3767 } 3768 3769 if (rd >= buffer_end) { 3770 break; 3771 } 3772 3773 // Remember this is where we found the head of the token. 3774 opt_hd = wrt; 3775 3776 // Tokens are strings of non white space characters separated 3777 // by one or more white spaces. 3778 while (rd < buffer_end && !isspace(*rd)) { 3779 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3780 int quote = *rd; // matching quote to look for 3781 rd++; // don't copy open quote 3782 while (rd < buffer_end && *rd != quote) { 3783 // include everything (even spaces) 3784 // up until the close quote 3785 *wrt++ = *rd++; // copy to option string 3786 } 3787 3788 if (rd < buffer_end) { 3789 rd++; // don't copy close quote 3790 } else { 3791 // did not see closing quote 3792 jio_fprintf(defaultStream::error_stream(), 3793 "Unmatched quote in %s\n", name); 3794 delete options; 3795 return JNI_ERR; 3796 } 3797 } else { 3798 *wrt++ = *rd++; // copy to option string 3799 } 3800 } 3801 3802 // steal a white space character and set it to NULL 3803 *wrt++ = '\0'; 3804 // We now have a complete token 3805 3806 JavaVMOption option; 3807 option.optionString = opt_hd; 3808 3809 options->append(option); // Fill in option 3810 3811 rd++; // Advance to next character 3812 } 3813 3814 // Fill out JavaVMInitArgs structure. 3815 jint status = vm_args->set_args(options); 3816 3817 delete options; 3818 return status; 3819 } 3820 3821 void Arguments::set_shared_spaces_flags() { 3822 if (DumpSharedSpaces) { 3823 if (RequireSharedSpaces) { 3824 warning("Cannot dump shared archive while using shared archive"); 3825 } 3826 UseSharedSpaces = false; 3827 #ifdef _LP64 3828 if (!UseCompressedOops || !UseCompressedClassPointers) { 3829 vm_exit_during_initialization( 3830 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3831 } 3832 } else { 3833 if (!UseCompressedOops || !UseCompressedClassPointers) { 3834 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3835 } 3836 #endif 3837 } 3838 } 3839 3840 #if !INCLUDE_ALL_GCS 3841 static void force_serial_gc() { 3842 FLAG_SET_DEFAULT(UseSerialGC, true); 3843 UNSUPPORTED_GC_OPTION(UseG1GC); 3844 UNSUPPORTED_GC_OPTION(UseParallelGC); 3845 UNSUPPORTED_GC_OPTION(UseParallelOldGC); 3846 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC); 3847 UNSUPPORTED_GC_OPTION(UseParNewGC); 3848 } 3849 #endif // INCLUDE_ALL_GCS 3850 3851 // Sharing support 3852 // Construct the path to the archive 3853 static char* get_shared_archive_path() { 3854 char *shared_archive_path; 3855 if (SharedArchiveFile == NULL) { 3856 char jvm_path[JVM_MAXPATHLEN]; 3857 os::jvm_path(jvm_path, sizeof(jvm_path)); 3858 char *end = strrchr(jvm_path, *os::file_separator()); 3859 if (end != NULL) *end = '\0'; 3860 size_t jvm_path_len = strlen(jvm_path); 3861 size_t file_sep_len = strlen(os::file_separator()); 3862 const size_t len = jvm_path_len + file_sep_len + 20; 3863 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal); 3864 if (shared_archive_path != NULL) { 3865 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa", 3866 jvm_path, os::file_separator()); 3867 } 3868 } else { 3869 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal); 3870 } 3871 return shared_archive_path; 3872 } 3873 3874 #ifndef PRODUCT 3875 // Determine whether LogVMOutput should be implicitly turned on. 3876 static bool use_vm_log() { 3877 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3878 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3879 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3880 PrintAssembly || TraceDeoptimization || TraceDependencies || 3881 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3882 return true; 3883 } 3884 3885 #ifdef COMPILER1 3886 if (PrintC1Statistics) { 3887 return true; 3888 } 3889 #endif // COMPILER1 3890 3891 #ifdef COMPILER2 3892 if (PrintOptoAssembly || PrintOptoStatistics) { 3893 return true; 3894 } 3895 #endif // COMPILER2 3896 3897 return false; 3898 } 3899 3900 #endif // PRODUCT 3901 3902 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args, 3903 char** flags_file, 3904 char** vm_options_file, 3905 const int vm_options_file_pos, 3906 ScopedVMInitArgs *vm_options_file_args, 3907 ScopedVMInitArgs* args_out) { 3908 jint code = parse_vm_options_file(*vm_options_file, vm_options_file_args); 3909 if (code != JNI_OK) { 3910 return code; 3911 } 3912 3913 // Now set global settings from the vm_option file, giving an error if 3914 // it has VMOptionsFile in it 3915 code = match_special_option_and_act(vm_options_file_args->get(), flags_file, 3916 NULL, NULL, NULL); 3917 if (code != JNI_OK) { 3918 return code; 3919 } 3920 3921 if (vm_options_file_args->get()->nOptions < 1) { 3922 return 0; 3923 } 3924 3925 return args_out->insert(args, vm_options_file_args->get(), 3926 vm_options_file_pos); 3927 } 3928 3929 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args, 3930 char ** flags_file, 3931 char ** vm_options_file, 3932 ScopedVMInitArgs* vm_options_file_args, 3933 ScopedVMInitArgs* args_out) { 3934 // Remaining part of option string 3935 const char* tail; 3936 int vm_options_file_pos = -1; 3937 3938 for (int index = 0; index < args->nOptions; index++) { 3939 const JavaVMOption* option = args->options + index; 3940 if (ArgumentsExt::process_options(option)) { 3941 continue; 3942 } 3943 if (match_option(option, "-XX:Flags=", &tail)) { 3944 *flags_file = (char *) tail; 3945 if (*flags_file == NULL) { 3946 jio_fprintf(defaultStream::error_stream(), 3947 "Cannot copy flags_file name.\n"); 3948 return JNI_ENOMEM; 3949 } 3950 continue; 3951 } 3952 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3953 if (vm_options_file != NULL) { 3954 // The caller accepts -XX:VMOptionsFile 3955 if (*vm_options_file != NULL) { 3956 jio_fprintf(defaultStream::error_stream(), 3957 "Only one VM Options file is supported " 3958 "on the command line\n"); 3959 return JNI_EINVAL; 3960 } 3961 3962 *vm_options_file = (char *) tail; 3963 vm_options_file_pos = index; // save position of -XX:VMOptionsFile 3964 if (*vm_options_file == NULL) { 3965 jio_fprintf(defaultStream::error_stream(), 3966 "Cannot copy vm_options_file name.\n"); 3967 return JNI_ENOMEM; 3968 } 3969 } else { 3970 jio_fprintf(defaultStream::error_stream(), 3971 "VM options file is only supported on the command line\n"); 3972 return JNI_EINVAL; 3973 } 3974 continue; 3975 } 3976 if (match_option(option, "-XX:+PrintVMOptions")) { 3977 PrintVMOptions = true; 3978 continue; 3979 } 3980 if (match_option(option, "-XX:-PrintVMOptions")) { 3981 PrintVMOptions = false; 3982 continue; 3983 } 3984 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) { 3985 IgnoreUnrecognizedVMOptions = true; 3986 continue; 3987 } 3988 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) { 3989 IgnoreUnrecognizedVMOptions = false; 3990 continue; 3991 } 3992 if (match_option(option, "-XX:+PrintFlagsInitial")) { 3993 CommandLineFlags::printFlags(tty, false); 3994 vm_exit(0); 3995 } 3996 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3997 #if INCLUDE_NMT 3998 // The launcher did not setup nmt environment variable properly. 3999 if (!MemTracker::check_launcher_nmt_support(tail)) { 4000 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 4001 } 4002 4003 // Verify if nmt option is valid. 4004 if (MemTracker::verify_nmt_option()) { 4005 // Late initialization, still in single-threaded mode. 4006 if (MemTracker::tracking_level() >= NMT_summary) { 4007 MemTracker::init(); 4008 } 4009 } else { 4010 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 4011 } 4012 continue; 4013 #else 4014 jio_fprintf(defaultStream::error_stream(), 4015 "Native Memory Tracking is not supported in this VM\n"); 4016 return JNI_ERR; 4017 #endif 4018 } 4019 4020 #ifndef PRODUCT 4021 if (match_option(option, "-XX:+PrintFlagsWithComments")) { 4022 CommandLineFlags::printFlags(tty, true); 4023 vm_exit(0); 4024 } 4025 #endif 4026 } 4027 4028 // If there's a VMOptionsFile, parse that (also can set flags_file) 4029 if ((vm_options_file != NULL) && (*vm_options_file != NULL)) { 4030 return insert_vm_options_file(args, flags_file, vm_options_file, 4031 vm_options_file_pos, vm_options_file_args, args_out); 4032 } 4033 return JNI_OK; 4034 } 4035 4036 static void print_options(const JavaVMInitArgs *args) { 4037 const char* tail; 4038 for (int index = 0; index < args->nOptions; index++) { 4039 const JavaVMOption *option = args->options + index; 4040 if (match_option(option, "-XX:", &tail)) { 4041 logOption(tail); 4042 } 4043 } 4044 } 4045 4046 // Parse entry point called from JNI_CreateJavaVM 4047 4048 jint Arguments::parse(const JavaVMInitArgs* args) { 4049 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent"); 4050 4051 // Initialize ranges and constraints 4052 CommandLineFlagRangeList::init(); 4053 CommandLineFlagConstraintList::init(); 4054 4055 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 4056 const char* hotspotrc = ".hotspotrc"; 4057 char* flags_file = NULL; 4058 char* vm_options_file = NULL; 4059 bool settings_file_specified = false; 4060 bool needs_hotspotrc_warning = false; 4061 ScopedVMInitArgs java_tool_options_args; 4062 ScopedVMInitArgs java_options_args; 4063 ScopedVMInitArgs modified_cmd_line_args; 4064 // Pass in vm_options_file_args to keep memory for flags_file from being 4065 // deallocated if found in the vm options file. 4066 ScopedVMInitArgs vm_options_file_args; 4067 4068 jint code = 4069 parse_java_tool_options_environment_variable(&java_tool_options_args); 4070 if (code != JNI_OK) { 4071 return code; 4072 } 4073 4074 code = parse_java_options_environment_variable(&java_options_args); 4075 if (code != JNI_OK) { 4076 return code; 4077 } 4078 4079 code = match_special_option_and_act(java_tool_options_args.get(), 4080 &flags_file, NULL, NULL, NULL); 4081 if (code != JNI_OK) { 4082 return code; 4083 } 4084 4085 code = match_special_option_and_act(args, &flags_file, &vm_options_file, 4086 &vm_options_file_args, 4087 &modified_cmd_line_args); 4088 if (code != JNI_OK) { 4089 return code; 4090 } 4091 4092 4093 // The command line arguments have been modified to include VMOptionsFile arguments. 4094 if (modified_cmd_line_args.is_set()) { 4095 args = modified_cmd_line_args.get(); 4096 } 4097 4098 code = match_special_option_and_act(java_options_args.get(), &flags_file, 4099 NULL, NULL, NULL); 4100 if (code != JNI_OK) { 4101 return code; 4102 } 4103 4104 settings_file_specified = (flags_file != NULL); 4105 4106 if (IgnoreUnrecognizedVMOptions) { 4107 // uncast const to modify the flag args->ignoreUnrecognized 4108 *(jboolean*)(&args->ignoreUnrecognized) = true; 4109 java_tool_options_args.get()->ignoreUnrecognized = true; 4110 java_options_args.get()->ignoreUnrecognized = true; 4111 } 4112 4113 // Parse specified settings file 4114 if (settings_file_specified) { 4115 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { 4116 return JNI_EINVAL; 4117 } 4118 } else { 4119 #ifdef ASSERT 4120 // Parse default .hotspotrc settings file 4121 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 4122 return JNI_EINVAL; 4123 } 4124 #else 4125 struct stat buf; 4126 if (os::stat(hotspotrc, &buf) == 0) { 4127 needs_hotspotrc_warning = true; 4128 } 4129 #endif 4130 } 4131 4132 if (PrintVMOptions) { 4133 print_options(java_tool_options_args.get()); 4134 print_options(args); 4135 print_options(java_options_args.get()); 4136 } 4137 4138 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 4139 jint result = parse_vm_init_args(java_tool_options_args.get(), 4140 java_options_args.get(), 4141 args); // command line arguments 4142 4143 if (result != JNI_OK) { 4144 return result; 4145 } 4146 4147 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 4148 SharedArchivePath = get_shared_archive_path(); 4149 if (SharedArchivePath == NULL) { 4150 return JNI_ENOMEM; 4151 } 4152 4153 // Set up VerifySharedSpaces 4154 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 4155 VerifySharedSpaces = true; 4156 } 4157 4158 // Delay warning until here so that we've had a chance to process 4159 // the -XX:-PrintWarnings flag 4160 if (needs_hotspotrc_warning) { 4161 warning("%s file is present but has been ignored. " 4162 "Run with -XX:Flags=%s to load the file.", 4163 hotspotrc, hotspotrc); 4164 } 4165 4166 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 4167 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages"); 4168 #endif 4169 4170 ArgumentsExt::report_unsupported_options(); 4171 4172 #ifndef PRODUCT 4173 if (TraceBytecodesAt != 0) { 4174 TraceBytecodes = true; 4175 } 4176 if (CountCompiledCalls) { 4177 if (UseCounterDecay) { 4178 warning("UseCounterDecay disabled because CountCalls is set"); 4179 UseCounterDecay = false; 4180 } 4181 } 4182 #endif // PRODUCT 4183 4184 if (ScavengeRootsInCode == 0) { 4185 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 4186 warning("Forcing ScavengeRootsInCode non-zero"); 4187 } 4188 ScavengeRootsInCode = 1; 4189 } 4190 4191 if (PrintGCDetails) { 4192 // Turn on -verbose:gc options as well 4193 PrintGC = true; 4194 } 4195 4196 // Set object alignment values. 4197 set_object_alignment(); 4198 4199 #if !INCLUDE_ALL_GCS 4200 force_serial_gc(); 4201 #endif // INCLUDE_ALL_GCS 4202 #if !INCLUDE_CDS 4203 if (DumpSharedSpaces || RequireSharedSpaces) { 4204 jio_fprintf(defaultStream::error_stream(), 4205 "Shared spaces are not supported in this VM\n"); 4206 return JNI_ERR; 4207 } 4208 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) { 4209 warning("Shared spaces are not supported in this VM"); 4210 FLAG_SET_DEFAULT(UseSharedSpaces, false); 4211 FLAG_SET_DEFAULT(PrintSharedSpaces, false); 4212 } 4213 no_shared_spaces("CDS Disabled"); 4214 #endif // INCLUDE_CDS 4215 4216 return JNI_OK; 4217 } 4218 4219 jint Arguments::apply_ergo() { 4220 4221 // Set flags based on ergonomics. 4222 set_ergonomics_flags(); 4223 4224 set_shared_spaces_flags(); 4225 4226 // Check the GC selections again. 4227 if (!check_gc_consistency()) { 4228 return JNI_EINVAL; 4229 } 4230 4231 if (TieredCompilation) { 4232 set_tiered_flags(); 4233 } else { 4234 int max_compilation_policy_choice = 1; 4235 #ifdef COMPILER2 4236 max_compilation_policy_choice = 2; 4237 #endif 4238 // Check if the policy is valid. 4239 if (CompilationPolicyChoice >= max_compilation_policy_choice) { 4240 vm_exit_during_initialization( 4241 "Incompatible compilation policy selected", NULL); 4242 } 4243 // Scale CompileThreshold 4244 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged. 4245 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 4246 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold)); 4247 } 4248 } 4249 4250 #ifdef COMPILER2 4251 #ifndef PRODUCT 4252 if (PrintIdealGraphLevel > 0) { 4253 FLAG_SET_ERGO(bool, PrintIdealGraph, true); 4254 } 4255 #endif 4256 #endif 4257 4258 // Set heap size based on available physical memory 4259 set_heap_size(); 4260 4261 ArgumentsExt::set_gc_specific_flags(); 4262 4263 // Initialize Metaspace flags and alignments 4264 Metaspace::ergo_initialize(); 4265 4266 // Set bytecode rewriting flags 4267 set_bytecode_flags(); 4268 4269 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 4270 jint code = set_aggressive_opts_flags(); 4271 if (code != JNI_OK) { 4272 return code; 4273 } 4274 4275 // Turn off biased locking for locking debug mode flags, 4276 // which are subtly different from each other but neither works with 4277 // biased locking 4278 if (UseHeavyMonitors 4279 #ifdef COMPILER1 4280 || !UseFastLocking 4281 #endif // COMPILER1 4282 ) { 4283 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 4284 // flag set to true on command line; warn the user that they 4285 // can't enable biased locking here 4286 warning("Biased Locking is not supported with locking debug flags" 4287 "; ignoring UseBiasedLocking flag." ); 4288 } 4289 UseBiasedLocking = false; 4290 } 4291 4292 #ifdef ZERO 4293 // Clear flags not supported on zero. 4294 FLAG_SET_DEFAULT(ProfileInterpreter, false); 4295 FLAG_SET_DEFAULT(UseBiasedLocking, false); 4296 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 4297 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 4298 #endif // CC_INTERP 4299 4300 #ifdef COMPILER2 4301 if (!EliminateLocks) { 4302 EliminateNestedLocks = false; 4303 } 4304 if (!Inline) { 4305 IncrementalInline = false; 4306 } 4307 #ifndef PRODUCT 4308 if (!IncrementalInline) { 4309 AlwaysIncrementalInline = false; 4310 } 4311 #endif 4312 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { 4313 // nothing to use the profiling, turn if off 4314 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 4315 } 4316 #endif 4317 4318 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 4319 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 4320 DebugNonSafepoints = true; 4321 } 4322 4323 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 4324 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 4325 } 4326 4327 #ifndef PRODUCT 4328 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 4329 if (use_vm_log()) { 4330 LogVMOutput = true; 4331 } 4332 } 4333 #endif // PRODUCT 4334 4335 if (PrintCommandLineFlags) { 4336 CommandLineFlags::printSetFlags(tty); 4337 } 4338 4339 // Apply CPU specific policy for the BiasedLocking 4340 if (UseBiasedLocking) { 4341 if (!VM_Version::use_biased_locking() && 4342 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 4343 UseBiasedLocking = false; 4344 } 4345 } 4346 #ifdef COMPILER2 4347 if (!UseBiasedLocking || EmitSync != 0) { 4348 UseOptoBiasInlining = false; 4349 } 4350 #endif 4351 4352 return JNI_OK; 4353 } 4354 4355 jint Arguments::adjust_after_os() { 4356 if (UseNUMA) { 4357 if (UseParallelGC || UseParallelOldGC) { 4358 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4359 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4360 } 4361 } 4362 // UseNUMAInterleaving is set to ON for all collectors and 4363 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4364 // such as the parallel collector for Linux and Solaris will 4365 // interleave old gen and survivor spaces on top of NUMA 4366 // allocation policy for the eden space. 4367 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4368 // all platforms and ParallelGC on Windows will interleave all 4369 // of the heap spaces across NUMA nodes. 4370 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4371 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4372 } 4373 } 4374 return JNI_OK; 4375 } 4376 4377 int Arguments::PropertyList_count(SystemProperty* pl) { 4378 int count = 0; 4379 while(pl != NULL) { 4380 count++; 4381 pl = pl->next(); 4382 } 4383 return count; 4384 } 4385 4386 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4387 assert(key != NULL, "just checking"); 4388 SystemProperty* prop; 4389 for (prop = pl; prop != NULL; prop = prop->next()) { 4390 if (strcmp(key, prop->key()) == 0) return prop->value(); 4391 } 4392 return NULL; 4393 } 4394 4395 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4396 int count = 0; 4397 const char* ret_val = NULL; 4398 4399 while(pl != NULL) { 4400 if(count >= index) { 4401 ret_val = pl->key(); 4402 break; 4403 } 4404 count++; 4405 pl = pl->next(); 4406 } 4407 4408 return ret_val; 4409 } 4410 4411 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4412 int count = 0; 4413 char* ret_val = NULL; 4414 4415 while(pl != NULL) { 4416 if(count >= index) { 4417 ret_val = pl->value(); 4418 break; 4419 } 4420 count++; 4421 pl = pl->next(); 4422 } 4423 4424 return ret_val; 4425 } 4426 4427 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4428 SystemProperty* p = *plist; 4429 if (p == NULL) { 4430 *plist = new_p; 4431 } else { 4432 while (p->next() != NULL) { 4433 p = p->next(); 4434 } 4435 p->set_next(new_p); 4436 } 4437 } 4438 4439 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) { 4440 if (plist == NULL) 4441 return; 4442 4443 SystemProperty* new_p = new SystemProperty(k, v, true); 4444 PropertyList_add(plist, new_p); 4445 } 4446 4447 void Arguments::PropertyList_add(SystemProperty *element) { 4448 PropertyList_add(&_system_properties, element); 4449 } 4450 4451 // This add maintains unique property key in the list. 4452 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) { 4453 if (plist == NULL) 4454 return; 4455 4456 // If property key exist then update with new value. 4457 SystemProperty* prop; 4458 for (prop = *plist; prop != NULL; prop = prop->next()) { 4459 if (strcmp(k, prop->key()) == 0) { 4460 if (append) { 4461 prop->append_value(v); 4462 } else { 4463 prop->set_value(v); 4464 } 4465 return; 4466 } 4467 } 4468 4469 PropertyList_add(plist, k, v); 4470 } 4471 4472 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4473 // Returns true if all of the source pointed by src has been copied over to 4474 // the destination buffer pointed by buf. Otherwise, returns false. 4475 // Notes: 4476 // 1. If the length (buflen) of the destination buffer excluding the 4477 // NULL terminator character is not long enough for holding the expanded 4478 // pid characters, it also returns false instead of returning the partially 4479 // expanded one. 4480 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4481 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4482 char* buf, size_t buflen) { 4483 const char* p = src; 4484 char* b = buf; 4485 const char* src_end = &src[srclen]; 4486 char* buf_end = &buf[buflen - 1]; 4487 4488 while (p < src_end && b < buf_end) { 4489 if (*p == '%') { 4490 switch (*(++p)) { 4491 case '%': // "%%" ==> "%" 4492 *b++ = *p++; 4493 break; 4494 case 'p': { // "%p" ==> current process id 4495 // buf_end points to the character before the last character so 4496 // that we could write '\0' to the end of the buffer. 4497 size_t buf_sz = buf_end - b + 1; 4498 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4499 4500 // if jio_snprintf fails or the buffer is not long enough to hold 4501 // the expanded pid, returns false. 4502 if (ret < 0 || ret >= (int)buf_sz) { 4503 return false; 4504 } else { 4505 b += ret; 4506 assert(*b == '\0', "fail in copy_expand_pid"); 4507 if (p == src_end && b == buf_end + 1) { 4508 // reach the end of the buffer. 4509 return true; 4510 } 4511 } 4512 p++; 4513 break; 4514 } 4515 default : 4516 *b++ = '%'; 4517 } 4518 } else { 4519 *b++ = *p++; 4520 } 4521 } 4522 *b = '\0'; 4523 return (p == src_end); // return false if not all of the source was copied 4524 }