1 /* 2 * Copyright (c) 1997, 2016, 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 "logging/log.hpp" 36 #include "logging/logTag.hpp" 37 #include "logging/logConfiguration.hpp" 38 #include "memory/allocation.inline.hpp" 39 #include "memory/universe.inline.hpp" 40 #include "oops/oop.inline.hpp" 41 #include "prims/jvmtiExport.hpp" 42 #include "runtime/arguments.hpp" 43 #include "runtime/arguments_ext.hpp" 44 #include "runtime/commandLineFlagConstraintList.hpp" 45 #include "runtime/commandLineFlagWriteableList.hpp" 46 #include "runtime/commandLineFlagRangeList.hpp" 47 #include "runtime/globals.hpp" 48 #include "runtime/globals_extension.hpp" 49 #include "runtime/java.hpp" 50 #include "runtime/os.hpp" 51 #include "runtime/vm_version.hpp" 52 #include "services/management.hpp" 53 #include "services/memTracker.hpp" 54 #include "utilities/defaultStream.hpp" 55 #include "utilities/macros.hpp" 56 #include "utilities/stringUtils.hpp" 57 #if INCLUDE_JVMCI 58 #include "jvmci/jvmciRuntime.hpp" 59 #endif 60 #if INCLUDE_ALL_GCS 61 #include "gc/cms/compactibleFreeListSpace.hpp" 62 #include "gc/g1/g1CollectedHeap.inline.hpp" 63 #include "gc/parallel/parallelScavengeHeap.hpp" 64 #endif // INCLUDE_ALL_GCS 65 66 // Note: This is a special bug reporting site for the JVM 67 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp" 68 #define DEFAULT_JAVA_LAUNCHER "generic" 69 70 char* Arguments::_jvm_flags_file = NULL; 71 char** Arguments::_jvm_flags_array = NULL; 72 int Arguments::_num_jvm_flags = 0; 73 char** Arguments::_jvm_args_array = NULL; 74 int Arguments::_num_jvm_args = 0; 75 char* Arguments::_java_command = NULL; 76 SystemProperty* Arguments::_system_properties = NULL; 77 const char* Arguments::_gc_log_filename = NULL; 78 bool Arguments::_has_profile = false; 79 size_t Arguments::_conservative_max_heap_alignment = 0; 80 size_t Arguments::_min_heap_size = 0; 81 Arguments::Mode Arguments::_mode = _mixed; 82 bool Arguments::_java_compiler = false; 83 bool Arguments::_xdebug_mode = false; 84 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 85 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 86 int Arguments::_sun_java_launcher_pid = -1; 87 bool Arguments::_sun_java_launcher_is_altjvm = false; 88 89 // These parameters are reset in method parse_vm_init_args() 90 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 91 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 92 bool Arguments::_BackgroundCompilation = BackgroundCompilation; 93 bool Arguments::_ClipInlining = ClipInlining; 94 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 95 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 96 97 char* Arguments::SharedArchivePath = NULL; 98 99 AgentLibraryList Arguments::_libraryList; 100 AgentLibraryList Arguments::_agentList; 101 102 abort_hook_t Arguments::_abort_hook = NULL; 103 exit_hook_t Arguments::_exit_hook = NULL; 104 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 105 106 107 SystemProperty *Arguments::_sun_boot_library_path = NULL; 108 SystemProperty *Arguments::_java_library_path = NULL; 109 SystemProperty *Arguments::_java_home = NULL; 110 SystemProperty *Arguments::_java_class_path = NULL; 111 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL; 112 113 GrowableArray<ModuleXPatchPath*> *Arguments::_xpatchprefix = NULL; 114 PathString *Arguments::_system_boot_class_path = NULL; 115 bool Arguments::_has_jimage = false; 116 117 char* Arguments::_ext_dirs = NULL; 118 119 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining 120 // part of the option string. 121 static bool match_option(const JavaVMOption *option, const char* name, 122 const char** tail) { 123 size_t len = strlen(name); 124 if (strncmp(option->optionString, name, len) == 0) { 125 *tail = option->optionString + len; 126 return true; 127 } else { 128 return false; 129 } 130 } 131 132 // Check if 'option' matches 'name'. No "tail" is allowed. 133 static bool match_option(const JavaVMOption *option, const char* name) { 134 const char* tail = NULL; 135 bool result = match_option(option, name, &tail); 136 if (tail != NULL && *tail == '\0') { 137 return result; 138 } else { 139 return false; 140 } 141 } 142 143 // Return true if any of the strings in null-terminated array 'names' matches. 144 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 145 // the option must match exactly. 146 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 147 bool tail_allowed) { 148 for (/* empty */; *names != NULL; ++names) { 149 if (match_option(option, *names, tail)) { 150 if (**tail == '\0' || tail_allowed && **tail == ':') { 151 return true; 152 } 153 } 154 } 155 return false; 156 } 157 158 static void logOption(const char* opt) { 159 if (PrintVMOptions) { 160 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 161 } 162 } 163 164 // Process java launcher properties. 165 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 166 // See if sun.java.launcher, sun.java.launcher.is_altjvm or 167 // sun.java.launcher.pid is defined. 168 // Must do this before setting up other system properties, 169 // as some of them may depend on launcher type. 170 for (int index = 0; index < args->nOptions; index++) { 171 const JavaVMOption* option = args->options + index; 172 const char* tail; 173 174 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 175 process_java_launcher_argument(tail, option->extraInfo); 176 continue; 177 } 178 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { 179 if (strcmp(tail, "true") == 0) { 180 _sun_java_launcher_is_altjvm = true; 181 } 182 continue; 183 } 184 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 185 _sun_java_launcher_pid = atoi(tail); 186 continue; 187 } 188 } 189 } 190 191 // Initialize system properties key and value. 192 void Arguments::init_system_properties() { 193 194 // Set up _system_boot_class_path which is not a property but 195 // relies heavily on argument processing and the jdk.boot.class.path.append 196 // property. It is used to store the underlying system boot class path. 197 _system_boot_class_path = new PathString(NULL); 198 199 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 200 "Java Virtual Machine Specification", false)); 201 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 202 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 203 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 204 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false)); 205 206 // Following are JVMTI agent writable properties. 207 // Properties values are set to NULL and they are 208 // os specific they are initialized in os::init_system_properties_values(). 209 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 210 _java_library_path = new SystemProperty("java.library.path", NULL, true); 211 _java_home = new SystemProperty("java.home", NULL, true); 212 _java_class_path = new SystemProperty("java.class.path", "", true); 213 // jdk.boot.class.path.append is a non-writeable, internal property. 214 // It can only be set by either: 215 // - -Xbootclasspath/a: 216 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase 217 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true); 218 219 // Add to System Property list. 220 PropertyList_add(&_system_properties, _sun_boot_library_path); 221 PropertyList_add(&_system_properties, _java_library_path); 222 PropertyList_add(&_system_properties, _java_home); 223 PropertyList_add(&_system_properties, _java_class_path); 224 PropertyList_add(&_system_properties, _jdk_boot_class_path_append); 225 226 // Set OS specific system properties values 227 os::init_system_properties_values(); 228 } 229 230 // Update/Initialize System properties after JDK version number is known 231 void Arguments::init_version_specific_system_properties() { 232 enum { bufsz = 16 }; 233 char buffer[bufsz]; 234 const char* spec_vendor = "Oracle Corporation"; 235 uint32_t spec_version = JDK_Version::current().major_version(); 236 237 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version); 238 239 PropertyList_add(&_system_properties, 240 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); 241 PropertyList_add(&_system_properties, 242 new SystemProperty("java.vm.specification.version", buffer, false)); 243 PropertyList_add(&_system_properties, 244 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 245 } 246 247 /* 248 * -XX argument processing: 249 * 250 * -XX arguments are defined in several places, such as: 251 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp. 252 * -XX arguments are parsed in parse_argument(). 253 * -XX argument bounds checking is done in check_vm_args_consistency(). 254 * 255 * Over time -XX arguments may change. There are mechanisms to handle common cases: 256 * 257 * ALIASED: An option that is simply another name for another option. This is often 258 * part of the process of deprecating a flag, but not all aliases need 259 * to be deprecated. 260 * 261 * Create an alias for an option by adding the old and new option names to the 262 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc). 263 * 264 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that 265 * support may be removed in the future. Both regular and aliased options may be 266 * deprecated. 267 * 268 * Add a deprecation warning for an option (or alias) by adding an entry in the 269 * "special_jvm_flags" table and setting the "deprecated_in" field. 270 * Often an option "deprecated" in one major release will 271 * be made "obsolete" in the next. In this case the entry should also have it's 272 * "obsolete_in" field set. 273 * 274 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted 275 * on the command line. A warning is printed to let the user know that option might not 276 * be accepted in the future. 277 * 278 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags" 279 * table and setting the "obsolete_in" field. 280 * 281 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal 282 * to the current JDK version. The system will flatly refuse to admit the existence of 283 * the flag. This allows a flag to die automatically over JDK releases. 284 * 285 * Note that manual cleanup of expired options should be done at major JDK version upgrades: 286 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables. 287 * - Newly obsolete or expired deprecated options should have their global variable 288 * definitions removed (from globals.hpp, etc) and related implementations removed. 289 * 290 * Recommended approach for removing options: 291 * 292 * To remove options commonly used by customers (e.g. product, commercial -XX options), use 293 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns. 294 * 295 * To remove internal options (e.g. diagnostic, experimental, develop options), use 296 * a 2-step model adding major release numbers to the obsolete and expire columns. 297 * 298 * To change the name of an option, use the alias table as well as a 2-step 299 * model adding major release numbers to the deprecate and expire columns. 300 * Think twice about aliasing commonly used customer options. 301 * 302 * There are times when it is appropriate to leave a future release number as undefined. 303 * 304 * Tests: Aliases should be tested in VMAliasOptions.java. 305 * Deprecated options should be tested in VMDeprecatedOptions.java. 306 */ 307 308 // Obsolete or deprecated -XX flag. 309 typedef struct { 310 const char* name; 311 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined"). 312 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined"). 313 JDK_Version expired_in; // When the option expires (or "undefined"). 314 } SpecialFlag; 315 316 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The 317 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both. 318 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on 319 // the command-line as usual, but will issue a warning. 320 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on 321 // the command-line, while issuing a warning and ignoring the flag value. 322 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the 323 // existence of the flag. 324 // 325 // MANUAL CLEANUP ON JDK VERSION UPDATES: 326 // This table ensures that the handling of options will update automatically when the JDK 327 // version is incremented, but the source code needs to be cleanup up manually: 328 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals" 329 // variable should be removed, as well as users of the variable. 330 // - As "deprecated" options age into "obsolete" options, move the entry into the 331 // "Obsolete Flags" section of the table. 332 // - All expired options should be removed from the table. 333 static SpecialFlag const special_jvm_flags[] = { 334 // -------------- Deprecated Flags -------------- 335 // --- Non-alias flags - sorted by obsolete_in then expired_in: 336 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 337 { "UseParNewGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 338 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 339 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 340 341 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in: 342 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 343 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 344 { "CMSMarkStackSizeMax", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 345 { "CMSMarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 346 { "G1MarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 347 { "ParallelMarkingThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 348 { "ParallelCMSThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, 349 350 // -------------- Obsolete Flags - sorted by expired_in -------------- 351 { "UseOldInlining", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 352 { "SafepointPollOffset", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 353 { "UseBoundThreads", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 354 { "DefaultThreadPriority", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 355 { "NoYieldsInMicrolock", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 356 { "BackEdgeThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 357 { "UseNewReflection", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 358 { "ReflectionWrapResolutionErrors",JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 359 { "VerifyReflectionBytecodes", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 360 { "AutoShutdownNMT", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 361 { "NmethodSweepFraction", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 362 { "NmethodSweepCheckInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 363 { "CodeCacheMinimumFreeSpace", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 364 #ifndef ZERO 365 { "UseFastAccessorMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 366 { "UseFastEmptyMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 367 #endif // ZERO 368 { "UseCompilerSafepoints", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 369 { "AdaptiveSizePausePolicy", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 370 { "ParallelGCRetainPLAB", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 371 { "ThreadSafetyMargin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 372 { "LazyBootClassLoader", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 373 { "StarvationMonitorInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 374 { "PreInflateSpin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 375 { "JNIDetachReleasesMonitors", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 376 { "UseAltSigs", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 377 { "SegmentedHeapDumpThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 378 { "PrintOopAddress", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, 379 380 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS 381 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() }, 382 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) }, 383 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) }, 384 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) }, 385 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 386 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 387 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() }, 388 #endif 389 390 { NULL, JDK_Version(0), JDK_Version(0) } 391 }; 392 393 // Flags that are aliases for other flags. 394 typedef struct { 395 const char* alias_name; 396 const char* real_name; 397 } AliasedFlag; 398 399 static AliasedFlag const aliased_jvm_flags[] = { 400 { "DefaultMaxRAMFraction", "MaxRAMFraction" }, 401 { "CMSMarkStackSizeMax", "MarkStackSizeMax" }, 402 { "CMSMarkStackSize", "MarkStackSize" }, 403 { "G1MarkStackSize", "MarkStackSize" }, 404 { "ParallelMarkingThreads", "ConcGCThreads" }, 405 { "ParallelCMSThreads", "ConcGCThreads" }, 406 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" }, 407 { NULL, NULL} 408 }; 409 410 // NOTE: A compatibility request will be necessary for each alias to be removed. 411 static AliasedLoggingFlag const aliased_logging_flags[] = { 412 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) }, 413 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) }, 414 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) }, 415 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) }, 416 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) }, 417 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) }, 418 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) }, 419 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) }, 420 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) }, 421 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) }, 422 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) }, 423 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) }, 424 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) }, 425 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) } 426 }; 427 428 #ifndef PRODUCT 429 // These options are removed in jdk9. Remove this code for jdk10. 430 static AliasedFlag const removed_develop_logging_flags[] = { 431 { "TraceClassInitialization", "-Xlog:class+init" }, 432 { "TraceClassLoaderData", "-Xlog:class+loader+data" }, 433 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" }, 434 { "TraceItables", "-Xlog:itables=debug" }, 435 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" }, 436 { "TraceSafepoint", "-Xlog:safepoint=debug" }, 437 { "TraceStartupTime", "-Xlog:startuptime" }, 438 { "TraceVMOperation", "-Xlog:vmoperation=debug" }, 439 { "PrintVtables", "-Xlog:vtables=debug" }, 440 { "VerboseVerification", "-Xlog:verification" }, 441 { NULL, NULL } 442 }; 443 #endif //PRODUCT 444 445 // Return true if "v" is less than "other", where "other" may be "undefined". 446 static bool version_less_than(JDK_Version v, JDK_Version other) { 447 assert(!v.is_undefined(), "must be defined"); 448 if (!other.is_undefined() && v.compare(other) >= 0) { 449 return false; 450 } else { 451 return true; 452 } 453 } 454 455 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) { 456 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 457 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 458 flag = special_jvm_flags[i]; 459 return true; 460 } 461 } 462 return false; 463 } 464 465 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) { 466 assert(version != NULL, "Must provide a version buffer"); 467 SpecialFlag flag; 468 if (lookup_special_flag(flag_name, flag)) { 469 if (!flag.obsolete_in.is_undefined()) { 470 if (version_less_than(JDK_Version::current(), flag.expired_in)) { 471 *version = flag.obsolete_in; 472 return true; 473 } 474 } 475 } 476 return false; 477 } 478 479 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) { 480 assert(version != NULL, "Must provide a version buffer"); 481 SpecialFlag flag; 482 if (lookup_special_flag(flag_name, flag)) { 483 if (!flag.deprecated_in.is_undefined()) { 484 if (version_less_than(JDK_Version::current(), flag.obsolete_in) && 485 version_less_than(JDK_Version::current(), flag.expired_in)) { 486 *version = flag.deprecated_in; 487 return 1; 488 } else { 489 return -1; 490 } 491 } 492 } 493 return 0; 494 } 495 496 #ifndef PRODUCT 497 const char* Arguments::removed_develop_logging_flag_name(const char* name){ 498 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) { 499 const AliasedFlag& flag = removed_develop_logging_flags[i]; 500 if (strcmp(flag.alias_name, name) == 0) { 501 return flag.real_name; 502 } 503 } 504 return NULL; 505 } 506 #endif // PRODUCT 507 508 const char* Arguments::real_flag_name(const char *flag_name) { 509 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) { 510 const AliasedFlag& flag_status = aliased_jvm_flags[i]; 511 if (strcmp(flag_status.alias_name, flag_name) == 0) { 512 return flag_status.real_name; 513 } 514 } 515 return flag_name; 516 } 517 518 #ifdef ASSERT 519 static bool lookup_special_flag(const char *flag_name, size_t skip_index) { 520 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 521 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 522 return true; 523 } 524 } 525 return false; 526 } 527 528 static bool verify_special_jvm_flags() { 529 bool success = true; 530 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 531 const SpecialFlag& flag = special_jvm_flags[i]; 532 if (lookup_special_flag(flag.name, i)) { 533 warning("Duplicate special flag declaration \"%s\"", flag.name); 534 success = false; 535 } 536 if (flag.deprecated_in.is_undefined() && 537 flag.obsolete_in.is_undefined()) { 538 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name); 539 success = false; 540 } 541 542 if (!flag.deprecated_in.is_undefined()) { 543 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) { 544 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name); 545 success = false; 546 } 547 548 if (!version_less_than(flag.deprecated_in, flag.expired_in)) { 549 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name); 550 success = false; 551 } 552 } 553 554 if (!flag.obsolete_in.is_undefined()) { 555 if (!version_less_than(flag.obsolete_in, flag.expired_in)) { 556 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name); 557 success = false; 558 } 559 560 // if flag has become obsolete it should not have a "globals" flag defined anymore. 561 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 562 if (Flag::find_flag(flag.name) != NULL) { 563 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name); 564 success = false; 565 } 566 } 567 } 568 569 if (!flag.expired_in.is_undefined()) { 570 // if flag has become expired it should not have a "globals" flag defined anymore. 571 if (!version_less_than(JDK_Version::current(), flag.expired_in)) { 572 if (Flag::find_flag(flag.name) != NULL) { 573 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name); 574 success = false; 575 } 576 } 577 } 578 579 } 580 return success; 581 } 582 #endif 583 584 // Parses a size specification string. 585 bool Arguments::atojulong(const char *s, julong* result) { 586 julong n = 0; 587 588 // First char must be a digit. Don't allow negative numbers or leading spaces. 589 if (!isdigit(*s)) { 590 return false; 591 } 592 593 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); 594 char* remainder; 595 errno = 0; 596 n = strtoull(s, &remainder, (is_hex ? 16 : 10)); 597 if (errno != 0) { 598 return false; 599 } 600 601 // Fail if no number was read at all or if the remainder contains more than a single non-digit character. 602 if (remainder == s || strlen(remainder) > 1) { 603 return false; 604 } 605 606 switch (*remainder) { 607 case 'T': case 't': 608 *result = n * G * K; 609 // Check for overflow. 610 if (*result/((julong)G * K) != n) return false; 611 return true; 612 case 'G': case 'g': 613 *result = n * G; 614 if (*result/G != n) return false; 615 return true; 616 case 'M': case 'm': 617 *result = n * M; 618 if (*result/M != n) return false; 619 return true; 620 case 'K': case 'k': 621 *result = n * K; 622 if (*result/K != n) return false; 623 return true; 624 case '\0': 625 *result = n; 626 return true; 627 default: 628 return false; 629 } 630 } 631 632 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { 633 if (size < min_size) return arg_too_small; 634 // Check that size will fit in a size_t (only relevant on 32-bit) 635 if (size > max_uintx) return arg_too_big; 636 return arg_in_range; 637 } 638 639 // Describe an argument out of range error 640 void Arguments::describe_range_error(ArgsRange errcode) { 641 switch(errcode) { 642 case arg_too_big: 643 jio_fprintf(defaultStream::error_stream(), 644 "The specified size exceeds the maximum " 645 "representable size.\n"); 646 break; 647 case arg_too_small: 648 case arg_unreadable: 649 case arg_in_range: 650 // do nothing for now 651 break; 652 default: 653 ShouldNotReachHere(); 654 } 655 } 656 657 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) { 658 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) { 659 return true; 660 } else { 661 return false; 662 } 663 } 664 665 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) { 666 char* end; 667 errno = 0; 668 double v = strtod(value, &end); 669 if ((errno != 0) || (*end != 0)) { 670 return false; 671 } 672 673 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) { 674 return true; 675 } 676 return false; 677 } 678 679 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) { 680 julong v; 681 int int_v; 682 intx intx_v; 683 bool is_neg = false; 684 Flag* result = Flag::find_flag(name, strlen(name)); 685 686 if (result == NULL) { 687 return false; 688 } 689 690 // Check the sign first since atojulong() parses only unsigned values. 691 if (*value == '-') { 692 if (!result->is_intx() && !result->is_int()) { 693 return false; 694 } 695 value++; 696 is_neg = true; 697 } 698 if (!Arguments::atojulong(value, &v)) { 699 return false; 700 } 701 if (result->is_int()) { 702 int_v = (int) v; 703 if (is_neg) { 704 int_v = -int_v; 705 } 706 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS; 707 } else if (result->is_uint()) { 708 uint uint_v = (uint) v; 709 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS; 710 } else if (result->is_intx()) { 711 intx_v = (intx) v; 712 if (is_neg) { 713 intx_v = -intx_v; 714 } 715 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS; 716 } else if (result->is_uintx()) { 717 uintx uintx_v = (uintx) v; 718 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS; 719 } else if (result->is_uint64_t()) { 720 uint64_t uint64_t_v = (uint64_t) v; 721 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS; 722 } else if (result->is_size_t()) { 723 size_t size_t_v = (size_t) v; 724 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS; 725 } else { 726 return false; 727 } 728 } 729 730 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) { 731 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false; 732 // Contract: CommandLineFlags always returns a pointer that needs freeing. 733 FREE_C_HEAP_ARRAY(char, value); 734 return true; 735 } 736 737 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) { 738 const char* old_value = ""; 739 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false; 740 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 741 size_t new_len = strlen(new_value); 742 const char* value; 743 char* free_this_too = NULL; 744 if (old_len == 0) { 745 value = new_value; 746 } else if (new_len == 0) { 747 value = old_value; 748 } else { 749 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtArguments); 750 // each new setting adds another LINE to the switch: 751 sprintf(buf, "%s\n%s", old_value, new_value); 752 value = buf; 753 free_this_too = buf; 754 } 755 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 756 // CommandLineFlags always returns a pointer that needs freeing. 757 FREE_C_HEAP_ARRAY(char, value); 758 if (free_this_too != NULL) { 759 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 760 FREE_C_HEAP_ARRAY(char, free_this_too); 761 } 762 return true; 763 } 764 765 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) { 766 const char* real_name = real_flag_name(arg); 767 JDK_Version since = JDK_Version(); 768 switch (is_deprecated_flag(arg, &since)) { 769 case -1: 770 return NULL; // obsolete or expired, don't process normally 771 case 0: 772 return real_name; 773 case 1: { 774 if (warn) { 775 char version[256]; 776 since.to_string(version, sizeof(version)); 777 if (real_name != arg) { 778 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.", 779 arg, version, real_name); 780 } else { 781 warning("Option %s was deprecated in version %s and will likely be removed in a future release.", 782 arg, version); 783 } 784 } 785 return real_name; 786 } 787 } 788 ShouldNotReachHere(); 789 return NULL; 790 } 791 792 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) { 793 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5}; 794 // Set tagset string buffer at max size of 256, large enough for any alias tagset 795 const int max_tagset_size = 256; 796 int max_tagset_len = max_tagset_size - 1; 797 char tagset_buffer[max_tagset_size]; 798 tagset_buffer[0] = '\0'; 799 800 // Write tag-set for aliased logging option, in string list form 801 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]); 802 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) { 803 if (i > 0) { 804 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer)); 805 } 806 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer)); 807 } 808 if (!alf.exactMatch) { 809 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer)); 810 } 811 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.", 812 (on) ? "+" : "-", 813 name, 814 tagset_buffer, 815 (on) ? LogLevel::name(alf.level) : "off"); 816 } 817 818 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){ 819 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) { 820 const AliasedLoggingFlag& alf = aliased_logging_flags[i]; 821 if (strcmp(alf.alias_name, name) == 0) { 822 log_deprecated_flag(name, on, alf); 823 return alf; 824 } 825 } 826 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)}; 827 return a; 828 } 829 830 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) { 831 832 // range of acceptable characters spelled out for portability reasons 833 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 834 #define BUFLEN 255 835 char name[BUFLEN+1]; 836 char dummy; 837 const char* real_name; 838 bool warn_if_deprecated = true; 839 840 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 841 AliasedLoggingFlag alf = catch_logging_aliases(name, false); 842 if (alf.alias_name != NULL){ 843 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 844 return true; 845 } 846 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 847 if (real_name == NULL) { 848 return false; 849 } 850 return set_bool_flag(real_name, false, origin); 851 } 852 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 853 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 854 if (alf.alias_name != NULL){ 855 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 856 return true; 857 } 858 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 859 if (real_name == NULL) { 860 return false; 861 } 862 return set_bool_flag(real_name, true, origin); 863 } 864 865 char punct; 866 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 867 const char* value = strchr(arg, '=') + 1; 868 Flag* flag; 869 870 // this scanf pattern matches both strings (handled here) and numbers (handled later)) 871 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 872 if (alf.alias_name != NULL) { 873 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 874 return true; 875 } 876 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 877 if (real_name == NULL) { 878 return false; 879 } 880 flag = Flag::find_flag(real_name); 881 if (flag != NULL && flag->is_ccstr()) { 882 if (flag->ccstr_accumulates()) { 883 return append_to_string_flag(real_name, value, origin); 884 } else { 885 if (value[0] == '\0') { 886 value = NULL; 887 } 888 return set_string_flag(real_name, value, origin); 889 } 890 } else { 891 warn_if_deprecated = false; // if arg is deprecated, we've already done warning... 892 } 893 } 894 895 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 896 const char* value = strchr(arg, '=') + 1; 897 // -XX:Foo:=xxx will reset the string flag to the given value. 898 if (value[0] == '\0') { 899 value = NULL; 900 } 901 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 902 if (real_name == NULL) { 903 return false; 904 } 905 return set_string_flag(real_name, value, origin); 906 } 907 908 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]" 909 #define SIGNED_NUMBER_RANGE "[-0123456789]" 910 #define NUMBER_RANGE "[0123456789eE+-]" 911 char value[BUFLEN + 1]; 912 char value2[BUFLEN + 1]; 913 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 914 // Looks like a floating-point number -- try again with more lenient format string 915 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 916 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 917 if (real_name == NULL) { 918 return false; 919 } 920 return set_fp_numeric_flag(real_name, value, origin); 921 } 922 } 923 924 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 925 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 926 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 927 if (real_name == NULL) { 928 return false; 929 } 930 return set_numeric_flag(real_name, value, origin); 931 } 932 933 return false; 934 } 935 936 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 937 assert(bldarray != NULL, "illegal argument"); 938 939 if (arg == NULL) { 940 return; 941 } 942 943 int new_count = *count + 1; 944 945 // expand the array and add arg to the last element 946 if (*bldarray == NULL) { 947 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments); 948 } else { 949 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments); 950 } 951 (*bldarray)[*count] = os::strdup_check_oom(arg); 952 *count = new_count; 953 } 954 955 void Arguments::build_jvm_args(const char* arg) { 956 add_string(&_jvm_args_array, &_num_jvm_args, arg); 957 } 958 959 void Arguments::build_jvm_flags(const char* arg) { 960 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 961 } 962 963 // utility function to return a string that concatenates all 964 // strings in a given char** array 965 const char* Arguments::build_resource_string(char** args, int count) { 966 if (args == NULL || count == 0) { 967 return NULL; 968 } 969 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator 970 for (int i = 1; i < count; i++) { 971 length += strlen(args[i]) + 1; // add 1 for a space 972 } 973 char* s = NEW_RESOURCE_ARRAY(char, length); 974 strcpy(s, args[0]); 975 for (int j = 1; j < count; j++) { 976 strcat(s, " "); 977 strcat(s, args[j]); 978 } 979 return (const char*) s; 980 } 981 982 void Arguments::print_on(outputStream* st) { 983 st->print_cr("VM Arguments:"); 984 if (num_jvm_flags() > 0) { 985 st->print("jvm_flags: "); print_jvm_flags_on(st); 986 st->cr(); 987 } 988 if (num_jvm_args() > 0) { 989 st->print("jvm_args: "); print_jvm_args_on(st); 990 st->cr(); 991 } 992 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 993 if (_java_class_path != NULL) { 994 char* path = _java_class_path->value(); 995 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 996 } 997 st->print_cr("Launcher Type: %s", _sun_java_launcher); 998 } 999 1000 void Arguments::print_summary_on(outputStream* st) { 1001 // Print the command line. Environment variables that are helpful for 1002 // reproducing the problem are written later in the hs_err file. 1003 // flags are from setting file 1004 if (num_jvm_flags() > 0) { 1005 st->print_raw("Settings File: "); 1006 print_jvm_flags_on(st); 1007 st->cr(); 1008 } 1009 // args are the command line and environment variable arguments. 1010 st->print_raw("Command Line: "); 1011 if (num_jvm_args() > 0) { 1012 print_jvm_args_on(st); 1013 } 1014 // this is the classfile and any arguments to the java program 1015 if (java_command() != NULL) { 1016 st->print("%s", java_command()); 1017 } 1018 st->cr(); 1019 } 1020 1021 void Arguments::print_jvm_flags_on(outputStream* st) { 1022 if (_num_jvm_flags > 0) { 1023 for (int i=0; i < _num_jvm_flags; i++) { 1024 st->print("%s ", _jvm_flags_array[i]); 1025 } 1026 } 1027 } 1028 1029 void Arguments::print_jvm_args_on(outputStream* st) { 1030 if (_num_jvm_args > 0) { 1031 for (int i=0; i < _num_jvm_args; i++) { 1032 st->print("%s ", _jvm_args_array[i]); 1033 } 1034 } 1035 } 1036 1037 bool Arguments::process_argument(const char* arg, 1038 jboolean ignore_unrecognized, 1039 Flag::Flags origin) { 1040 JDK_Version since = JDK_Version(); 1041 1042 if (parse_argument(arg, origin)) { 1043 return true; 1044 } 1045 1046 // Determine if the flag has '+', '-', or '=' characters. 1047 bool has_plus_minus = (*arg == '+' || *arg == '-'); 1048 const char* const argname = has_plus_minus ? arg + 1 : arg; 1049 1050 size_t arg_len; 1051 const char* equal_sign = strchr(argname, '='); 1052 if (equal_sign == NULL) { 1053 arg_len = strlen(argname); 1054 } else { 1055 arg_len = equal_sign - argname; 1056 } 1057 1058 // Only make the obsolete check for valid arguments. 1059 if (arg_len <= BUFLEN) { 1060 // Construct a string which consists only of the argument name without '+', '-', or '='. 1061 char stripped_argname[BUFLEN+1]; 1062 strncpy(stripped_argname, argname, arg_len); 1063 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate. 1064 if (is_obsolete_flag(stripped_argname, &since)) { 1065 char version[256]; 1066 since.to_string(version, sizeof(version)); 1067 warning("Ignoring option %s; support was removed in %s", stripped_argname, version); 1068 return true; 1069 } 1070 #ifndef PRODUCT 1071 else { 1072 const char* replacement; 1073 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){ 1074 log_warning(arguments)("%s has been removed. Please use %s instead.", 1075 stripped_argname, 1076 replacement); 1077 return false; 1078 } 1079 } 1080 #endif //PRODUCT 1081 } 1082 1083 // For locked flags, report a custom error message if available. 1084 // Otherwise, report the standard unrecognized VM option. 1085 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true); 1086 if (found_flag != NULL) { 1087 char locked_message_buf[BUFLEN]; 1088 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN); 1089 if (strlen(locked_message_buf) == 0) { 1090 if (found_flag->is_bool() && !has_plus_minus) { 1091 jio_fprintf(defaultStream::error_stream(), 1092 "Missing +/- setting for VM option '%s'\n", argname); 1093 } else if (!found_flag->is_bool() && has_plus_minus) { 1094 jio_fprintf(defaultStream::error_stream(), 1095 "Unexpected +/- setting in VM option '%s'\n", argname); 1096 } else { 1097 jio_fprintf(defaultStream::error_stream(), 1098 "Improperly specified VM option '%s'\n", argname); 1099 } 1100 } else { 1101 #ifdef PRODUCT 1102 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) || 1103 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD)); 1104 if (ignore_unrecognized && mismatched) { 1105 return true; 1106 } 1107 #endif 1108 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 1109 } 1110 } else { 1111 if (ignore_unrecognized) { 1112 return true; 1113 } 1114 jio_fprintf(defaultStream::error_stream(), 1115 "Unrecognized VM option '%s'\n", argname); 1116 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true); 1117 if (fuzzy_matched != NULL) { 1118 jio_fprintf(defaultStream::error_stream(), 1119 "Did you mean '%s%s%s'? ", 1120 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 1121 fuzzy_matched->_name, 1122 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 1123 } 1124 } 1125 1126 // allow for commandline "commenting out" options like -XX:#+Verbose 1127 return arg[0] == '#'; 1128 } 1129 1130 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 1131 FILE* stream = fopen(file_name, "rb"); 1132 if (stream == NULL) { 1133 if (should_exist) { 1134 jio_fprintf(defaultStream::error_stream(), 1135 "Could not open settings file %s\n", file_name); 1136 return false; 1137 } else { 1138 return true; 1139 } 1140 } 1141 1142 char token[1024]; 1143 int pos = 0; 1144 1145 bool in_white_space = true; 1146 bool in_comment = false; 1147 bool in_quote = false; 1148 char quote_c = 0; 1149 bool result = true; 1150 1151 int c = getc(stream); 1152 while(c != EOF && pos < (int)(sizeof(token)-1)) { 1153 if (in_white_space) { 1154 if (in_comment) { 1155 if (c == '\n') in_comment = false; 1156 } else { 1157 if (c == '#') in_comment = true; 1158 else if (!isspace(c)) { 1159 in_white_space = false; 1160 token[pos++] = c; 1161 } 1162 } 1163 } else { 1164 if (c == '\n' || (!in_quote && isspace(c))) { 1165 // token ends at newline, or at unquoted whitespace 1166 // this allows a way to include spaces in string-valued options 1167 token[pos] = '\0'; 1168 logOption(token); 1169 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1170 build_jvm_flags(token); 1171 pos = 0; 1172 in_white_space = true; 1173 in_quote = false; 1174 } else if (!in_quote && (c == '\'' || c == '"')) { 1175 in_quote = true; 1176 quote_c = c; 1177 } else if (in_quote && (c == quote_c)) { 1178 in_quote = false; 1179 } else { 1180 token[pos++] = c; 1181 } 1182 } 1183 c = getc(stream); 1184 } 1185 if (pos > 0) { 1186 token[pos] = '\0'; 1187 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1188 build_jvm_flags(token); 1189 } 1190 fclose(stream); 1191 return result; 1192 } 1193 1194 //============================================================================================================= 1195 // Parsing of properties (-D) 1196 1197 const char* Arguments::get_property(const char* key) { 1198 return PropertyList_get_value(system_properties(), key); 1199 } 1200 1201 bool Arguments::add_property(const char* prop) { 1202 const char* eq = strchr(prop, '='); 1203 const char* key; 1204 const char* value = ""; 1205 1206 if (eq == NULL) { 1207 // property doesn't have a value, thus use passed string 1208 key = prop; 1209 } else { 1210 // property have a value, thus extract it and save to the 1211 // allocated string 1212 size_t key_len = eq - prop; 1213 char* tmp_key = AllocateHeap(key_len + 1, mtArguments); 1214 1215 strncpy(tmp_key, prop, key_len); 1216 tmp_key[key_len] = '\0'; 1217 key = tmp_key; 1218 1219 value = &prop[key_len + 1]; 1220 } 1221 1222 if (strcmp(key, "java.compiler") == 0) { 1223 process_java_compiler_argument(value); 1224 // Record value in Arguments, but let it get passed to Java. 1225 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 1226 strcmp(key, "sun.java.launcher.pid") == 0) { 1227 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1228 // private and are processed in process_sun_java_launcher_properties(); 1229 // the sun.java.launcher property is passed on to the java application 1230 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1231 PropertyList_unique_add(&_system_properties, key, value, true); 1232 } else { 1233 if (strcmp(key, "sun.java.command") == 0) { 1234 char *old_java_command = _java_command; 1235 _java_command = os::strdup_check_oom(value, mtArguments); 1236 if (old_java_command != NULL) { 1237 os::free(old_java_command); 1238 } 1239 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1240 const char* old_java_vendor_url_bug = _java_vendor_url_bug; 1241 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1242 // its value without going through the property list or making a Java call. 1243 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments); 1244 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) { 1245 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL"); 1246 os::free((void *)old_java_vendor_url_bug); 1247 } 1248 } 1249 1250 // Create new property and add at the end of the list 1251 PropertyList_unique_add(&_system_properties, key, value); 1252 } 1253 1254 if (key != prop) { 1255 // SystemProperty copy passed value, thus free previously allocated 1256 // memory 1257 FreeHeap((void *)key); 1258 } 1259 1260 return true; 1261 } 1262 1263 // sets or adds a module name to the jdk.launcher.addmods property 1264 bool Arguments::append_to_addmods_property(const char* module_name) { 1265 const char* key = "jdk.launcher.addmods"; 1266 const char* old_value = Arguments::get_property(key); 1267 size_t buf_len = strlen(key) + strlen(module_name) + 2; 1268 if (old_value != NULL) { 1269 buf_len += strlen(old_value) + 1; 1270 } 1271 char* new_value = AllocateHeap(buf_len, mtArguments); 1272 if (new_value == NULL) { 1273 return false; 1274 } 1275 if (old_value == NULL) { 1276 jio_snprintf(new_value, buf_len, "%s=%s", key, module_name); 1277 } else { 1278 jio_snprintf(new_value, buf_len, "%s=%s,%s", key, old_value, module_name); 1279 } 1280 bool added = add_property(new_value); 1281 FreeHeap(new_value); 1282 return added; 1283 } 1284 1285 #if INCLUDE_CDS 1286 void Arguments::check_unsupported_dumping_properties() { 1287 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump"); 1288 const char* unsupported_properties[5] = { "jdk.module.main", 1289 "jdk.module.path", 1290 "jdk.upgrade.module.path", 1291 "jdk.launcher.addmods", 1292 "jdk.launcher.limitmods" }; 1293 const char* unsupported_options[5] = { "-m", 1294 "-modulepath", 1295 "-upgrademodulepath", 1296 "-addmods", 1297 "-limitmods" }; 1298 SystemProperty* sp = system_properties(); 1299 while (sp != NULL) { 1300 for (int i = 0; i < 5; i++) { 1301 if (strcmp(sp->key(), unsupported_properties[i]) == 0) { 1302 vm_exit_during_initialization( 1303 "Cannot use the following option when dumping the shared archive", unsupported_options[i]); 1304 } 1305 } 1306 sp = sp->next(); 1307 } 1308 1309 // Check for an exploded module build in use with -Xshare:dump. 1310 if (!has_jimage()) { 1311 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build"); 1312 } 1313 } 1314 #endif 1315 1316 //=========================================================================================================== 1317 // Setting int/mixed/comp mode flags 1318 1319 void Arguments::set_mode_flags(Mode mode) { 1320 // Set up default values for all flags. 1321 // If you add a flag to any of the branches below, 1322 // add a default value for it here. 1323 set_java_compiler(false); 1324 _mode = mode; 1325 1326 // Ensure Agent_OnLoad has the correct initial values. 1327 // This may not be the final mode; mode may change later in onload phase. 1328 PropertyList_unique_add(&_system_properties, "java.vm.info", 1329 VM_Version::vm_info_string(), false); 1330 1331 UseInterpreter = true; 1332 UseCompiler = true; 1333 UseLoopCounter = true; 1334 1335 // Default values may be platform/compiler dependent - 1336 // use the saved values 1337 ClipInlining = Arguments::_ClipInlining; 1338 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1339 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1340 BackgroundCompilation = Arguments::_BackgroundCompilation; 1341 if (TieredCompilation) { 1342 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) { 1343 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog; 1344 } 1345 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) { 1346 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold; 1347 } 1348 } 1349 1350 // Change from defaults based on mode 1351 switch (mode) { 1352 default: 1353 ShouldNotReachHere(); 1354 break; 1355 case _int: 1356 UseCompiler = false; 1357 UseLoopCounter = false; 1358 AlwaysCompileLoopMethods = false; 1359 UseOnStackReplacement = false; 1360 break; 1361 case _mixed: 1362 // same as default 1363 break; 1364 case _comp: 1365 UseInterpreter = false; 1366 BackgroundCompilation = false; 1367 ClipInlining = false; 1368 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1369 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1370 // compile a level 4 (C2) and then continue executing it. 1371 if (TieredCompilation) { 1372 Tier3InvokeNotifyFreqLog = 0; 1373 Tier4InvocationThreshold = 0; 1374 } 1375 break; 1376 } 1377 } 1378 1379 #if defined(COMPILER2) || INCLUDE_JVMCI || defined(_LP64) || !INCLUDE_CDS 1380 // Conflict: required to use shared spaces (-Xshare:on), but 1381 // incompatible command line options were chosen. 1382 1383 static void no_shared_spaces(const char* message) { 1384 if (RequireSharedSpaces) { 1385 jio_fprintf(defaultStream::error_stream(), 1386 "Class data sharing is inconsistent with other specified options.\n"); 1387 vm_exit_during_initialization("Unable to use shared archive.", message); 1388 } else { 1389 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1390 } 1391 } 1392 #endif 1393 1394 // Returns threshold scaled with the value of scale. 1395 // If scale < 0.0, threshold is returned without scaling. 1396 intx Arguments::scaled_compile_threshold(intx threshold, double scale) { 1397 if (scale == 1.0 || scale < 0.0) { 1398 return threshold; 1399 } else { 1400 return (intx)(threshold * scale); 1401 } 1402 } 1403 1404 // Returns freq_log scaled with the value of scale. 1405 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1]. 1406 // If scale < 0.0, freq_log is returned without scaling. 1407 intx Arguments::scaled_freq_log(intx freq_log, double scale) { 1408 // Check if scaling is necessary or if negative value was specified. 1409 if (scale == 1.0 || scale < 0.0) { 1410 return freq_log; 1411 } 1412 // Check values to avoid calculating log2 of 0. 1413 if (scale == 0.0 || freq_log == 0) { 1414 return 0; 1415 } 1416 // Determine the maximum notification frequency value currently supported. 1417 // The largest mask value that the interpreter/C1 can handle is 1418 // of length InvocationCounter::number_of_count_bits. Mask values are always 1419 // one bit shorter then the value of the notification frequency. Set 1420 // max_freq_bits accordingly. 1421 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1; 1422 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale); 1423 if (scaled_freq == 0) { 1424 // Return 0 right away to avoid calculating log2 of 0. 1425 return 0; 1426 } else if (scaled_freq > nth_bit(max_freq_bits)) { 1427 return max_freq_bits; 1428 } else { 1429 return log2_intptr(scaled_freq); 1430 } 1431 } 1432 1433 void Arguments::set_tiered_flags() { 1434 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. 1435 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { 1436 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); 1437 } 1438 if (CompilationPolicyChoice < 2) { 1439 vm_exit_during_initialization( 1440 "Incompatible compilation policy selected", NULL); 1441 } 1442 // Increase the code cache size - tiered compiles a lot more. 1443 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1444 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize, 1445 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5)); 1446 } 1447 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M 1448 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { 1449 FLAG_SET_ERGO(bool, SegmentedCodeCache, true); 1450 } 1451 if (!UseInterpreter) { // -Xcomp 1452 Tier3InvokeNotifyFreqLog = 0; 1453 Tier4InvocationThreshold = 0; 1454 } 1455 1456 if (CompileThresholdScaling < 0) { 1457 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL); 1458 } 1459 1460 // Scale tiered compilation thresholds. 1461 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged. 1462 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 1463 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog)); 1464 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog)); 1465 1466 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold)); 1467 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold)); 1468 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold)); 1469 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold)); 1470 1471 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here 1472 // once these thresholds become supported. 1473 1474 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog)); 1475 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog)); 1476 1477 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog)); 1478 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog)); 1479 1480 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog)); 1481 1482 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold)); 1483 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold)); 1484 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold)); 1485 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold)); 1486 } 1487 } 1488 1489 #if INCLUDE_ALL_GCS 1490 static void disable_adaptive_size_policy(const char* collector_name) { 1491 if (UseAdaptiveSizePolicy) { 1492 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) { 1493 warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.", 1494 collector_name); 1495 } 1496 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 1497 } 1498 } 1499 1500 void Arguments::set_parnew_gc_flags() { 1501 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, 1502 "control point invariant"); 1503 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1504 assert(UseParNewGC, "ParNew should always be used with CMS"); 1505 1506 if (FLAG_IS_DEFAULT(ParallelGCThreads)) { 1507 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1508 assert(ParallelGCThreads > 0, "We should always have at least one thread by default"); 1509 } else if (ParallelGCThreads == 0) { 1510 jio_fprintf(defaultStream::error_stream(), 1511 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n"); 1512 vm_exit(1); 1513 } 1514 1515 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, 1516 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 1517 // we set them to 1024 and 1024. 1518 // See CR 6362902. 1519 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 1520 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 1521 } 1522 if (FLAG_IS_DEFAULT(OldPLABSize)) { 1523 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 1524 } 1525 1526 // When using compressed oops, we use local overflow stacks, 1527 // rather than using a global overflow list chained through 1528 // the klass word of the object's pre-image. 1529 if (UseCompressedOops && !ParGCUseLocalOverflow) { 1530 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { 1531 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); 1532 } 1533 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); 1534 } 1535 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); 1536 } 1537 1538 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on 1539 // sparc/solaris for certain applications, but would gain from 1540 // further optimization and tuning efforts, and would almost 1541 // certainly gain from analysis of platform and environment. 1542 void Arguments::set_cms_and_parnew_gc_flags() { 1543 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); 1544 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1545 assert(UseParNewGC, "ParNew should always be used with CMS"); 1546 1547 // Turn off AdaptiveSizePolicy by default for cms until it is complete. 1548 disable_adaptive_size_policy("UseConcMarkSweepGC"); 1549 1550 set_parnew_gc_flags(); 1551 1552 size_t max_heap = align_size_down(MaxHeapSize, 1553 CardTableRS::ct_max_alignment_constraint()); 1554 1555 // Now make adjustments for CMS 1556 intx tenuring_default = (intx)6; 1557 size_t young_gen_per_worker = CMSYoungGenPerWorker; 1558 1559 // Preferred young gen size for "short" pauses: 1560 // upper bound depends on # of threads and NewRatio. 1561 const size_t preferred_max_new_size_unaligned = 1562 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads)); 1563 size_t preferred_max_new_size = 1564 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1565 1566 // Unless explicitly requested otherwise, size young gen 1567 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads 1568 1569 // If either MaxNewSize or NewRatio is set on the command line, 1570 // assume the user is trying to set the size of the young gen. 1571 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { 1572 1573 // Set MaxNewSize to our calculated preferred_max_new_size unless 1574 // NewSize was set on the command line and it is larger than 1575 // preferred_max_new_size. 1576 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1577 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1578 } else { 1579 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size); 1580 } 1581 log_trace(gc, heap)("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1582 1583 // Code along this path potentially sets NewSize and OldSize 1584 log_trace(gc, heap)("CMS set min_heap_size: " SIZE_FORMAT " initial_heap_size: " SIZE_FORMAT " max_heap: " SIZE_FORMAT, 1585 min_heap_size(), InitialHeapSize, max_heap); 1586 size_t min_new = preferred_max_new_size; 1587 if (FLAG_IS_CMDLINE(NewSize)) { 1588 min_new = NewSize; 1589 } 1590 if (max_heap > min_new && min_heap_size() > min_new) { 1591 // Unless explicitly requested otherwise, make young gen 1592 // at least min_new, and at most preferred_max_new_size. 1593 if (FLAG_IS_DEFAULT(NewSize)) { 1594 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new)); 1595 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize)); 1596 log_trace(gc, heap)("CMS ergo set NewSize: " SIZE_FORMAT, NewSize); 1597 } 1598 // Unless explicitly requested otherwise, size old gen 1599 // so it's NewRatio x of NewSize. 1600 if (FLAG_IS_DEFAULT(OldSize)) { 1601 if (max_heap > NewSize) { 1602 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize)); 1603 log_trace(gc, heap)("CMS ergo set OldSize: " SIZE_FORMAT, OldSize); 1604 } 1605 } 1606 } 1607 } 1608 // Unless explicitly requested otherwise, definitely 1609 // promote all objects surviving "tenuring_default" scavenges. 1610 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1611 FLAG_IS_DEFAULT(SurvivorRatio)) { 1612 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default); 1613 } 1614 // If we decided above (or user explicitly requested) 1615 // `promote all' (via MaxTenuringThreshold := 0), 1616 // prefer minuscule survivor spaces so as not to waste 1617 // space for (non-existent) survivors 1618 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1619 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio)); 1620 } 1621 1622 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words, 1623 // but rather the number of free blocks of a given size that are used when 1624 // replenishing the local per-worker free list caches. 1625 if (FLAG_IS_DEFAULT(OldPLABSize)) { 1626 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { 1627 // OldPLAB sizing manually turned off: Use a larger default setting, 1628 // unless it was manually specified. This is because a too-low value 1629 // will slow down scavenges. 1630 FLAG_SET_ERGO(size_t, OldPLABSize, CompactibleFreeListSpaceLAB::_default_static_old_plab_size); // default value before 6631166 1631 } else { 1632 FLAG_SET_DEFAULT(OldPLABSize, CompactibleFreeListSpaceLAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default 1633 } 1634 } 1635 1636 // If either of the static initialization defaults have changed, note this 1637 // modification. 1638 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) { 1639 CompactibleFreeListSpaceLAB::modify_initialization(OldPLABSize, OldPLABWeight); 1640 } 1641 1642 if (!ClassUnloading) { 1643 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false); 1644 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false); 1645 } 1646 1647 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1648 } 1649 #endif // INCLUDE_ALL_GCS 1650 1651 void set_object_alignment() { 1652 // Object alignment. 1653 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1654 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1655 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1656 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1657 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1658 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1659 1660 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1661 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1662 1663 // Oop encoding heap max 1664 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1665 1666 if (SurvivorAlignmentInBytes == 0) { 1667 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1668 } 1669 1670 #if INCLUDE_ALL_GCS 1671 // Set CMS global values 1672 CompactibleFreeListSpace::set_cms_values(); 1673 #endif // INCLUDE_ALL_GCS 1674 } 1675 1676 size_t Arguments::max_heap_for_compressed_oops() { 1677 // Avoid sign flip. 1678 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1679 // We need to fit both the NULL page and the heap into the memory budget, while 1680 // keeping alignment constraints of the heap. To guarantee the latter, as the 1681 // NULL page is located before the heap, we pad the NULL page to the conservative 1682 // maximum alignment that the GC may ever impose upon the heap. 1683 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(), 1684 _conservative_max_heap_alignment); 1685 1686 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1687 NOT_LP64(ShouldNotReachHere(); return 0); 1688 } 1689 1690 bool Arguments::should_auto_select_low_pause_collector() { 1691 if (UseAutoGCSelectPolicy && 1692 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1693 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1694 log_trace(gc)("Automatic selection of the low pause collector based on pause goal of %d (ms)", (int) MaxGCPauseMillis); 1695 return true; 1696 } 1697 return false; 1698 } 1699 1700 void Arguments::set_use_compressed_oops() { 1701 #ifndef ZERO 1702 #ifdef _LP64 1703 // MaxHeapSize is not set up properly at this point, but 1704 // the only value that can override MaxHeapSize if we are 1705 // to use UseCompressedOops is InitialHeapSize. 1706 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1707 1708 if (max_heap_size <= max_heap_for_compressed_oops()) { 1709 #if !defined(COMPILER1) || defined(TIERED) 1710 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1711 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1712 } 1713 #endif 1714 } else { 1715 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1716 warning("Max heap size too large for Compressed Oops"); 1717 FLAG_SET_DEFAULT(UseCompressedOops, false); 1718 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1719 } 1720 } 1721 #endif // _LP64 1722 #endif // ZERO 1723 } 1724 1725 1726 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1727 // set_use_compressed_oops(). 1728 void Arguments::set_use_compressed_klass_ptrs() { 1729 #ifndef ZERO 1730 #ifdef _LP64 1731 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1732 if (!UseCompressedOops) { 1733 if (UseCompressedClassPointers) { 1734 warning("UseCompressedClassPointers requires UseCompressedOops"); 1735 } 1736 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1737 } else { 1738 // Turn on UseCompressedClassPointers too 1739 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1740 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1741 } 1742 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1743 if (UseCompressedClassPointers) { 1744 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1745 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1746 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1747 } 1748 } 1749 } 1750 #endif // _LP64 1751 #endif // !ZERO 1752 } 1753 1754 void Arguments::set_conservative_max_heap_alignment() { 1755 // The conservative maximum required alignment for the heap is the maximum of 1756 // the alignments imposed by several sources: any requirements from the heap 1757 // itself, the collector policy and the maximum page size we may run the VM 1758 // with. 1759 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment(); 1760 #if INCLUDE_ALL_GCS 1761 if (UseParallelGC) { 1762 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment(); 1763 } else if (UseG1GC) { 1764 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment(); 1765 } 1766 #endif // INCLUDE_ALL_GCS 1767 _conservative_max_heap_alignment = MAX4(heap_alignment, 1768 (size_t)os::vm_allocation_granularity(), 1769 os::max_page_size(), 1770 CollectorPolicy::compute_heap_alignment()); 1771 } 1772 1773 bool Arguments::gc_selected() { 1774 #if INCLUDE_ALL_GCS 1775 return UseSerialGC || UseParallelGC || UseParallelOldGC || UseConcMarkSweepGC || UseG1GC; 1776 #else 1777 return UseSerialGC; 1778 #endif // INCLUDE_ALL_GCS 1779 } 1780 1781 void Arguments::select_gc_ergonomically() { 1782 #if INCLUDE_ALL_GCS 1783 if (os::is_server_class_machine()) { 1784 if (should_auto_select_low_pause_collector()) { 1785 FLAG_SET_ERGO_IF_DEFAULT(bool, UseConcMarkSweepGC, true); 1786 } else { 1787 FLAG_SET_ERGO_IF_DEFAULT(bool, UseG1GC, true); 1788 } 1789 } else { 1790 FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true); 1791 } 1792 #else 1793 UNSUPPORTED_OPTION(UseG1GC); 1794 UNSUPPORTED_OPTION(UseParallelGC); 1795 UNSUPPORTED_OPTION(UseParallelOldGC); 1796 UNSUPPORTED_OPTION(UseConcMarkSweepGC); 1797 UNSUPPORTED_OPTION(UseParNewGC); 1798 FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true); 1799 #endif // INCLUDE_ALL_GCS 1800 } 1801 1802 void Arguments::select_gc() { 1803 if (!gc_selected()) { 1804 select_gc_ergonomically(); 1805 if (!gc_selected()) { 1806 vm_exit_during_initialization("Garbage collector not selected (default collector explicitly disabled)", NULL); 1807 } 1808 } 1809 } 1810 1811 void Arguments::set_ergonomics_flags() { 1812 select_gc(); 1813 1814 #if defined(COMPILER2) || INCLUDE_JVMCI 1815 // Shared spaces work fine with other GCs but causes bytecode rewriting 1816 // to be disabled, which hurts interpreter performance and decreases 1817 // server performance. When -server is specified, keep the default off 1818 // unless it is asked for. Future work: either add bytecode rewriting 1819 // at link time, or rewrite bytecodes in non-shared methods. 1820 if (!DumpSharedSpaces && !RequireSharedSpaces && 1821 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { 1822 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); 1823 } 1824 #endif 1825 1826 set_conservative_max_heap_alignment(); 1827 1828 #ifndef ZERO 1829 #ifdef _LP64 1830 set_use_compressed_oops(); 1831 1832 // set_use_compressed_klass_ptrs() must be called after calling 1833 // set_use_compressed_oops(). 1834 set_use_compressed_klass_ptrs(); 1835 1836 // Also checks that certain machines are slower with compressed oops 1837 // in vm_version initialization code. 1838 #endif // _LP64 1839 #endif // !ZERO 1840 1841 CodeCacheExtensions::set_ergonomics_flags(); 1842 } 1843 1844 void Arguments::set_parallel_gc_flags() { 1845 assert(UseParallelGC || UseParallelOldGC, "Error"); 1846 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file). 1847 if (FLAG_IS_DEFAULT(UseParallelOldGC)) { 1848 FLAG_SET_DEFAULT(UseParallelOldGC, true); 1849 } 1850 FLAG_SET_DEFAULT(UseParallelGC, true); 1851 1852 // If no heap maximum was requested explicitly, use some reasonable fraction 1853 // of the physical memory, up to a maximum of 1GB. 1854 FLAG_SET_DEFAULT(ParallelGCThreads, 1855 Abstract_VM_Version::parallel_worker_threads()); 1856 if (ParallelGCThreads == 0) { 1857 jio_fprintf(defaultStream::error_stream(), 1858 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n"); 1859 vm_exit(1); 1860 } 1861 1862 if (UseAdaptiveSizePolicy) { 1863 // We don't want to limit adaptive heap sizing's freedom to adjust the heap 1864 // unless the user actually sets these flags. 1865 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) { 1866 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0); 1867 } 1868 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) { 1869 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100); 1870 } 1871 } 1872 1873 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1874 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1875 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1876 // See CR 6362902 for details. 1877 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1878 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1879 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1880 } 1881 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1882 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1883 } 1884 } 1885 1886 if (UseParallelOldGC) { 1887 // Par compact uses lower default values since they are treated as 1888 // minimums. These are different defaults because of the different 1889 // interpretation and are not ergonomically set. 1890 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1891 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1892 } 1893 } 1894 } 1895 1896 void Arguments::set_g1_gc_flags() { 1897 assert(UseG1GC, "Error"); 1898 #if defined(COMPILER1) || INCLUDE_JVMCI 1899 FastTLABRefill = false; 1900 #endif 1901 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1902 if (ParallelGCThreads == 0) { 1903 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0."); 1904 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL); 1905 } 1906 1907 #if INCLUDE_ALL_GCS 1908 if (FLAG_IS_DEFAULT(G1ConcRefinementThreads)) { 1909 FLAG_SET_ERGO(uint, G1ConcRefinementThreads, ParallelGCThreads); 1910 } 1911 #endif 1912 1913 // MarkStackSize will be set (if it hasn't been set by the user) 1914 // when concurrent marking is initialized. 1915 // Its value will be based upon the number of parallel marking threads. 1916 // But we do set the maximum mark stack size here. 1917 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) { 1918 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE); 1919 } 1920 1921 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { 1922 // In G1, we want the default GC overhead goal to be higher than 1923 // it is for PS, or the heap might be expanded too aggressively. 1924 // We set it here to ~8%. 1925 FLAG_SET_DEFAULT(GCTimeRatio, 12); 1926 } 1927 1928 // Below, we might need to calculate the pause time interval based on 1929 // the pause target. When we do so we are going to give G1 maximum 1930 // flexibility and allow it to do pauses when it needs to. So, we'll 1931 // arrange that the pause interval to be pause time target + 1 to 1932 // ensure that a) the pause time target is maximized with respect to 1933 // the pause interval and b) we maintain the invariant that pause 1934 // time target < pause interval. If the user does not want this 1935 // maximum flexibility, they will have to set the pause interval 1936 // explicitly. 1937 1938 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) { 1939 // The default pause time target in G1 is 200ms 1940 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200); 1941 } 1942 1943 // Then, if the interval parameter was not set, set it according to 1944 // the pause time target (this will also deal with the case when the 1945 // pause time target is the default value). 1946 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { 1947 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1); 1948 } 1949 1950 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1951 } 1952 1953 void Arguments::set_gc_specific_flags() { 1954 #if INCLUDE_ALL_GCS 1955 // Set per-collector flags 1956 if (UseParallelGC || UseParallelOldGC) { 1957 set_parallel_gc_flags(); 1958 } else if (UseConcMarkSweepGC) { 1959 set_cms_and_parnew_gc_flags(); 1960 } else if (UseG1GC) { 1961 set_g1_gc_flags(); 1962 } 1963 if (AssumeMP && !UseSerialGC) { 1964 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 1965 warning("If the number of processors is expected to increase from one, then" 1966 " you should configure the number of parallel GC threads appropriately" 1967 " using -XX:ParallelGCThreads=N"); 1968 } 1969 } 1970 if (MinHeapFreeRatio == 100) { 1971 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1972 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99); 1973 } 1974 #endif // INCLUDE_ALL_GCS 1975 } 1976 1977 julong Arguments::limit_by_allocatable_memory(julong limit) { 1978 julong max_allocatable; 1979 julong result = limit; 1980 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1981 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1982 } 1983 return result; 1984 } 1985 1986 // Use static initialization to get the default before parsing 1987 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1988 1989 void Arguments::set_heap_size() { 1990 const julong phys_mem = 1991 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1992 : (julong)MaxRAM; 1993 1994 // If the maximum heap size has not been set with -Xmx, 1995 // then set it as fraction of the size of physical memory, 1996 // respecting the maximum and minimum sizes of the heap. 1997 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1998 julong reasonable_max = phys_mem / MaxRAMFraction; 1999 2000 if (phys_mem <= MaxHeapSize * MinRAMFraction) { 2001 // Small physical memory, so use a minimum fraction of it for the heap 2002 reasonable_max = phys_mem / MinRAMFraction; 2003 } else { 2004 // Not-small physical memory, so require a heap at least 2005 // as large as MaxHeapSize 2006 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 2007 } 2008 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 2009 // Limit the heap size to ErgoHeapSizeLimit 2010 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 2011 } 2012 if (UseCompressedOops) { 2013 // Limit the heap size to the maximum possible when using compressed oops 2014 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 2015 2016 // HeapBaseMinAddress can be greater than default but not less than. 2017 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 2018 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 2019 // matches compressed oops printing flags 2020 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT 2021 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT, 2022 DefaultHeapBaseMinAddress, 2023 DefaultHeapBaseMinAddress/G, 2024 HeapBaseMinAddress); 2025 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 2026 } 2027 } 2028 2029 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 2030 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 2031 // but it should be not less than default MaxHeapSize. 2032 max_coop_heap -= HeapBaseMinAddress; 2033 } 2034 reasonable_max = MIN2(reasonable_max, max_coop_heap); 2035 } 2036 reasonable_max = limit_by_allocatable_memory(reasonable_max); 2037 2038 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 2039 // An initial heap size was specified on the command line, 2040 // so be sure that the maximum size is consistent. Done 2041 // after call to limit_by_allocatable_memory because that 2042 // method might reduce the allocation size. 2043 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 2044 } 2045 2046 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 2047 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max); 2048 } 2049 2050 // If the minimum or initial heap_size have not been set or requested to be set 2051 // ergonomically, set them accordingly. 2052 if (InitialHeapSize == 0 || min_heap_size() == 0) { 2053 julong reasonable_minimum = (julong)(OldSize + NewSize); 2054 2055 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 2056 2057 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 2058 2059 if (InitialHeapSize == 0) { 2060 julong reasonable_initial = phys_mem / InitialRAMFraction; 2061 2062 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 2063 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 2064 2065 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 2066 2067 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial); 2068 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial); 2069 } 2070 // If the minimum heap size has not been set (via -Xms), 2071 // synchronize with InitialHeapSize to avoid errors with the default value. 2072 if (min_heap_size() == 0) { 2073 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize)); 2074 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 2075 } 2076 } 2077 } 2078 2079 // This option inspects the machine and attempts to set various 2080 // parameters to be optimal for long-running, memory allocation 2081 // intensive jobs. It is intended for machines with large 2082 // amounts of cpu and memory. 2083 jint Arguments::set_aggressive_heap_flags() { 2084 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 2085 // VM, but we may not be able to represent the total physical memory 2086 // available (like having 8gb of memory on a box but using a 32bit VM). 2087 // Thus, we need to make sure we're using a julong for intermediate 2088 // calculations. 2089 julong initHeapSize; 2090 julong total_memory = os::physical_memory(); 2091 2092 if (total_memory < (julong) 256 * M) { 2093 jio_fprintf(defaultStream::error_stream(), 2094 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 2095 vm_exit(1); 2096 } 2097 2098 // The heap size is half of available memory, or (at most) 2099 // all of possible memory less 160mb (leaving room for the OS 2100 // when using ISM). This is the maximum; because adaptive sizing 2101 // is turned on below, the actual space used may be smaller. 2102 2103 initHeapSize = MIN2(total_memory / (julong) 2, 2104 total_memory - (julong) 160 * M); 2105 2106 initHeapSize = limit_by_allocatable_memory(initHeapSize); 2107 2108 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 2109 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) { 2110 return JNI_EINVAL; 2111 } 2112 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) { 2113 return JNI_EINVAL; 2114 } 2115 // Currently the minimum size and the initial heap sizes are the same. 2116 set_min_heap_size(initHeapSize); 2117 } 2118 if (FLAG_IS_DEFAULT(NewSize)) { 2119 // Make the young generation 3/8ths of the total heap. 2120 if (FLAG_SET_CMDLINE(size_t, NewSize, 2121 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) { 2122 return JNI_EINVAL; 2123 } 2124 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) { 2125 return JNI_EINVAL; 2126 } 2127 } 2128 2129 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 2130 FLAG_SET_DEFAULT(UseLargePages, true); 2131 #endif 2132 2133 // Increase some data structure sizes for efficiency 2134 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) { 2135 return JNI_EINVAL; 2136 } 2137 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) { 2138 return JNI_EINVAL; 2139 } 2140 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) { 2141 return JNI_EINVAL; 2142 } 2143 2144 // See the OldPLABSize comment below, but replace 'after promotion' 2145 // with 'after copying'. YoungPLABSize is the size of the survivor 2146 // space per-gc-thread buffers. The default is 4kw. 2147 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words 2148 return JNI_EINVAL; 2149 } 2150 2151 // OldPLABSize is the size of the buffers in the old gen that 2152 // UseParallelGC uses to promote live data that doesn't fit in the 2153 // survivor spaces. At any given time, there's one for each gc thread. 2154 // The default size is 1kw. These buffers are rarely used, since the 2155 // survivor spaces are usually big enough. For specjbb, however, there 2156 // are occasions when there's lots of live data in the young gen 2157 // and we end up promoting some of it. We don't have a definite 2158 // explanation for why bumping OldPLABSize helps, but the theory 2159 // is that a bigger PLAB results in retaining something like the 2160 // original allocation order after promotion, which improves mutator 2161 // locality. A minor effect may be that larger PLABs reduce the 2162 // number of PLAB allocation events during gc. The value of 8kw 2163 // was arrived at by experimenting with specjbb. 2164 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words 2165 return JNI_EINVAL; 2166 } 2167 2168 // Enable parallel GC and adaptive generation sizing 2169 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) { 2170 return JNI_EINVAL; 2171 } 2172 FLAG_SET_DEFAULT(ParallelGCThreads, 2173 Abstract_VM_Version::parallel_worker_threads()); 2174 2175 // Encourage steady state memory management 2176 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) { 2177 return JNI_EINVAL; 2178 } 2179 2180 // This appears to improve mutator locality 2181 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 2182 return JNI_EINVAL; 2183 } 2184 2185 // Get around early Solaris scheduling bug 2186 // (affinity vs other jobs on system) 2187 // but disallow DR and offlining (5008695). 2188 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) { 2189 return JNI_EINVAL; 2190 } 2191 2192 return JNI_OK; 2193 } 2194 2195 // This must be called after ergonomics. 2196 void Arguments::set_bytecode_flags() { 2197 if (!RewriteBytecodes) { 2198 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 2199 } 2200 } 2201 2202 // Aggressive optimization flags -XX:+AggressiveOpts 2203 jint Arguments::set_aggressive_opts_flags() { 2204 #ifdef COMPILER2 2205 if (AggressiveUnboxing) { 2206 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 2207 FLAG_SET_DEFAULT(EliminateAutoBox, true); 2208 } else if (!EliminateAutoBox) { 2209 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 2210 AggressiveUnboxing = false; 2211 } 2212 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 2213 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 2214 } else if (!DoEscapeAnalysis) { 2215 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 2216 AggressiveUnboxing = false; 2217 } 2218 } 2219 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 2220 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 2221 FLAG_SET_DEFAULT(EliminateAutoBox, true); 2222 } 2223 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 2224 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 2225 } 2226 2227 // Feed the cache size setting into the JDK 2228 char buffer[1024]; 2229 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 2230 if (!add_property(buffer)) { 2231 return JNI_ENOMEM; 2232 } 2233 } 2234 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 2235 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 2236 } 2237 #endif 2238 2239 if (AggressiveOpts) { 2240 // Sample flag setting code 2241 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 2242 // FLAG_SET_DEFAULT(EliminateZeroing, true); 2243 // } 2244 } 2245 2246 return JNI_OK; 2247 } 2248 2249 //=========================================================================================================== 2250 // Parsing of java.compiler property 2251 2252 void Arguments::process_java_compiler_argument(const char* arg) { 2253 // For backwards compatibility, Djava.compiler=NONE or "" 2254 // causes us to switch to -Xint mode UNLESS -Xdebug 2255 // is also specified. 2256 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 2257 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 2258 } 2259 } 2260 2261 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2262 _sun_java_launcher = os::strdup_check_oom(launcher); 2263 } 2264 2265 bool Arguments::created_by_java_launcher() { 2266 assert(_sun_java_launcher != NULL, "property must have value"); 2267 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2268 } 2269 2270 bool Arguments::sun_java_launcher_is_altjvm() { 2271 return _sun_java_launcher_is_altjvm; 2272 } 2273 2274 //=========================================================================================================== 2275 // Parsing of main arguments 2276 2277 #if INCLUDE_JVMCI 2278 // Check consistency of jvmci vm argument settings. 2279 bool Arguments::check_jvmci_args_consistency() { 2280 return JVMCIGlobals::check_jvmci_flags_are_consistent(); 2281 } 2282 #endif //INCLUDE_JVMCI 2283 2284 // Check consistency of GC selection 2285 bool Arguments::check_gc_consistency() { 2286 // Ensure that the user has not selected conflicting sets 2287 // of collectors. 2288 uint i = 0; 2289 if (UseSerialGC) i++; 2290 if (UseConcMarkSweepGC) i++; 2291 if (UseParallelGC || UseParallelOldGC) i++; 2292 if (UseG1GC) i++; 2293 if (i > 1) { 2294 jio_fprintf(defaultStream::error_stream(), 2295 "Conflicting collector combinations in option list; " 2296 "please refer to the release notes for the combinations " 2297 "allowed\n"); 2298 return false; 2299 } 2300 2301 if (UseConcMarkSweepGC && !UseParNewGC) { 2302 jio_fprintf(defaultStream::error_stream(), 2303 "It is not possible to combine the DefNew young collector with the CMS collector.\n"); 2304 return false; 2305 } 2306 2307 if (UseParNewGC && !UseConcMarkSweepGC) { 2308 jio_fprintf(defaultStream::error_stream(), 2309 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n"); 2310 return false; 2311 } 2312 2313 return true; 2314 } 2315 2316 // Check the consistency of vm_init_args 2317 bool Arguments::check_vm_args_consistency() { 2318 // Method for adding checks for flag consistency. 2319 // The intent is to warn the user of all possible conflicts, 2320 // before returning an error. 2321 // Note: Needs platform-dependent factoring. 2322 bool status = true; 2323 2324 if (TLABRefillWasteFraction == 0) { 2325 jio_fprintf(defaultStream::error_stream(), 2326 "TLABRefillWasteFraction should be a denominator, " 2327 "not " SIZE_FORMAT "\n", 2328 TLABRefillWasteFraction); 2329 status = false; 2330 } 2331 2332 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 2333 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 2334 } 2335 2336 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) { 2337 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false); 2338 } 2339 2340 if (GCTimeLimit == 100) { 2341 // Turn off gc-overhead-limit-exceeded checks 2342 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 2343 } 2344 2345 status = status && check_gc_consistency(); 2346 2347 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 2348 // insists that we hold the requisite locks so that the iteration is 2349 // MT-safe. For the verification at start-up and shut-down, we don't 2350 // yet have a good way of acquiring and releasing these locks, 2351 // which are not visible at the CollectedHeap level. We want to 2352 // be able to acquire these locks and then do the iteration rather 2353 // than just disable the lock verification. This will be fixed under 2354 // bug 4788986. 2355 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 2356 if (VerifyDuringStartup) { 2357 warning("Heap verification at start-up disabled " 2358 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2359 VerifyDuringStartup = false; // Disable verification at start-up 2360 } 2361 2362 if (VerifyBeforeExit) { 2363 warning("Heap verification at shutdown disabled " 2364 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2365 VerifyBeforeExit = false; // Disable verification at shutdown 2366 } 2367 } 2368 2369 if (PrintNMTStatistics) { 2370 #if INCLUDE_NMT 2371 if (MemTracker::tracking_level() == NMT_off) { 2372 #endif // INCLUDE_NMT 2373 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2374 PrintNMTStatistics = false; 2375 #if INCLUDE_NMT 2376 } 2377 #endif 2378 } 2379 #if INCLUDE_JVMCI 2380 2381 status = status && check_jvmci_args_consistency(); 2382 2383 if (EnableJVMCI) { 2384 if (!ScavengeRootsInCode) { 2385 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled"); 2386 ScavengeRootsInCode = 1; 2387 } 2388 if (FLAG_IS_DEFAULT(TypeProfileLevel)) { 2389 TypeProfileLevel = 0; 2390 } 2391 if (UseJVMCICompiler) { 2392 if (FLAG_IS_DEFAULT(TypeProfileWidth)) { 2393 TypeProfileWidth = 8; 2394 } 2395 } 2396 } 2397 #endif 2398 2399 // Check lower bounds of the code cache 2400 // Template Interpreter code is approximately 3X larger in debug builds. 2401 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); 2402 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) { 2403 jio_fprintf(defaultStream::error_stream(), 2404 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K, 2405 os::vm_page_size()/K); 2406 status = false; 2407 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) { 2408 jio_fprintf(defaultStream::error_stream(), 2409 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", 2410 ReservedCodeCacheSize/K, InitialCodeCacheSize/K); 2411 status = false; 2412 } else if (ReservedCodeCacheSize < min_code_cache_size) { 2413 jio_fprintf(defaultStream::error_stream(), 2414 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, 2415 min_code_cache_size/K); 2416 status = false; 2417 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) { 2418 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported. 2419 jio_fprintf(defaultStream::error_stream(), 2420 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, 2421 CODE_CACHE_SIZE_LIMIT/M); 2422 status = false; 2423 } else if (NonNMethodCodeHeapSize < min_code_cache_size) { 2424 jio_fprintf(defaultStream::error_stream(), 2425 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, 2426 min_code_cache_size/K); 2427 status = false; 2428 } 2429 2430 #ifdef _LP64 2431 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { 2432 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); 2433 } 2434 #endif 2435 2436 #ifndef SUPPORT_RESERVED_STACK_AREA 2437 if (StackReservedPages != 0) { 2438 FLAG_SET_CMDLINE(intx, StackReservedPages, 0); 2439 warning("Reserved Stack Area not supported on this platform"); 2440 } 2441 #endif 2442 2443 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) { 2444 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) { 2445 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options."); 2446 } 2447 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 2448 } 2449 if (UseCompiler && is_interpreter_only()) { 2450 if (!FLAG_IS_DEFAULT(UseCompiler)) { 2451 warning("UseCompiler disabled due to -Xint."); 2452 } 2453 FLAG_SET_CMDLINE(bool, UseCompiler, false); 2454 } 2455 #ifdef COMPILER2 2456 if (PostLoopMultiversioning && !RangeCheckElimination) { 2457 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) { 2458 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled."); 2459 } 2460 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false); 2461 } 2462 #endif 2463 return status; 2464 } 2465 2466 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2467 const char* option_type) { 2468 if (ignore) return false; 2469 2470 const char* spacer = " "; 2471 if (option_type == NULL) { 2472 option_type = ++spacer; // Set both to the empty string. 2473 } 2474 2475 if (os::obsolete_option(option)) { 2476 jio_fprintf(defaultStream::error_stream(), 2477 "Obsolete %s%soption: %s\n", option_type, spacer, 2478 option->optionString); 2479 return false; 2480 } else { 2481 jio_fprintf(defaultStream::error_stream(), 2482 "Unrecognized %s%soption: %s\n", option_type, spacer, 2483 option->optionString); 2484 return true; 2485 } 2486 } 2487 2488 static const char* user_assertion_options[] = { 2489 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2490 }; 2491 2492 static const char* system_assertion_options[] = { 2493 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2494 }; 2495 2496 bool Arguments::parse_uintx(const char* value, 2497 uintx* uintx_arg, 2498 uintx min_size) { 2499 2500 // Check the sign first since atojulong() parses only unsigned values. 2501 bool value_is_positive = !(*value == '-'); 2502 2503 if (value_is_positive) { 2504 julong n; 2505 bool good_return = atojulong(value, &n); 2506 if (good_return) { 2507 bool above_minimum = n >= min_size; 2508 bool value_is_too_large = n > max_uintx; 2509 2510 if (above_minimum && !value_is_too_large) { 2511 *uintx_arg = n; 2512 return true; 2513 } 2514 } 2515 } 2516 return false; 2517 } 2518 2519 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2520 julong* long_arg, 2521 julong min_size) { 2522 if (!atojulong(s, long_arg)) return arg_unreadable; 2523 return check_memory_size(*long_arg, min_size); 2524 } 2525 2526 // Parse JavaVMInitArgs structure 2527 2528 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 2529 const JavaVMInitArgs *java_options_args, 2530 const JavaVMInitArgs *cmd_line_args) { 2531 bool xpatch_javabase = false; 2532 2533 // Save default settings for some mode flags 2534 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2535 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2536 Arguments::_ClipInlining = ClipInlining; 2537 Arguments::_BackgroundCompilation = BackgroundCompilation; 2538 if (TieredCompilation) { 2539 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 2540 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 2541 } 2542 2543 // Setup flags for mixed which is the default 2544 set_mode_flags(_mixed); 2545 2546 // Parse args structure generated from JAVA_TOOL_OPTIONS environment 2547 // variable (if present). 2548 jint result = parse_each_vm_init_arg(java_tool_options_args, &xpatch_javabase, Flag::ENVIRON_VAR); 2549 if (result != JNI_OK) { 2550 return result; 2551 } 2552 2553 // Parse args structure generated from the command line flags. 2554 result = parse_each_vm_init_arg(cmd_line_args, &xpatch_javabase, Flag::COMMAND_LINE); 2555 if (result != JNI_OK) { 2556 return result; 2557 } 2558 2559 // Parse args structure generated from the _JAVA_OPTIONS environment 2560 // variable (if present) (mimics classic VM) 2561 result = parse_each_vm_init_arg(java_options_args, &xpatch_javabase, Flag::ENVIRON_VAR); 2562 if (result != JNI_OK) { 2563 return result; 2564 } 2565 2566 // Do final processing now that all arguments have been parsed 2567 result = finalize_vm_init_args(); 2568 if (result != JNI_OK) { 2569 return result; 2570 } 2571 2572 return JNI_OK; 2573 } 2574 2575 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2576 // represents a valid JDWP agent. is_path==true denotes that we 2577 // are dealing with -agentpath (case where name is a path), otherwise with 2578 // -agentlib 2579 bool valid_jdwp_agent(char *name, bool is_path) { 2580 char *_name; 2581 const char *_jdwp = "jdwp"; 2582 size_t _len_jdwp, _len_prefix; 2583 2584 if (is_path) { 2585 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2586 return false; 2587 } 2588 2589 _name++; // skip past last path separator 2590 _len_prefix = strlen(JNI_LIB_PREFIX); 2591 2592 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2593 return false; 2594 } 2595 2596 _name += _len_prefix; 2597 _len_jdwp = strlen(_jdwp); 2598 2599 if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2600 _name += _len_jdwp; 2601 } 2602 else { 2603 return false; 2604 } 2605 2606 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2607 return false; 2608 } 2609 2610 return true; 2611 } 2612 2613 if (strcmp(name, _jdwp) == 0) { 2614 return true; 2615 } 2616 2617 return false; 2618 } 2619 2620 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* xpatch_javabase, Flag::Flags origin) { 2621 // For match_option to return remaining or value part of option string 2622 const char* tail; 2623 2624 // iterate over arguments 2625 for (int index = 0; index < args->nOptions; index++) { 2626 bool is_absolute_path = false; // for -agentpath vs -agentlib 2627 2628 const JavaVMOption* option = args->options + index; 2629 2630 if (!match_option(option, "-Djava.class.path", &tail) && 2631 !match_option(option, "-Dsun.java.command", &tail) && 2632 !match_option(option, "-Dsun.java.launcher", &tail)) { 2633 2634 // add all jvm options to the jvm_args string. This string 2635 // is used later to set the java.vm.args PerfData string constant. 2636 // the -Djava.class.path and the -Dsun.java.command options are 2637 // omitted from jvm_args string as each have their own PerfData 2638 // string constant object. 2639 build_jvm_args(option->optionString); 2640 } 2641 2642 // -verbose:[class/gc/jni] 2643 if (match_option(option, "-verbose", &tail)) { 2644 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2645 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load)); 2646 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload)); 2647 } else if (!strcmp(tail, ":gc")) { 2648 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); 2649 } else if (!strcmp(tail, ":jni")) { 2650 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) { 2651 return JNI_EINVAL; 2652 } 2653 } 2654 // -da / -ea / -disableassertions / -enableassertions 2655 // These accept an optional class/package name separated by a colon, e.g., 2656 // -da:java.lang.Thread. 2657 } else if (match_option(option, user_assertion_options, &tail, true)) { 2658 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2659 if (*tail == '\0') { 2660 JavaAssertions::setUserClassDefault(enable); 2661 } else { 2662 assert(*tail == ':', "bogus match by match_option()"); 2663 JavaAssertions::addOption(tail + 1, enable); 2664 } 2665 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2666 } else if (match_option(option, system_assertion_options, &tail, false)) { 2667 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2668 JavaAssertions::setSystemClassDefault(enable); 2669 // -bootclasspath: 2670 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2671 jio_fprintf(defaultStream::output_stream(), 2672 "-Xbootclasspath is no longer a supported option.\n"); 2673 return JNI_EINVAL; 2674 // -bootclasspath/a: 2675 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2676 Arguments::append_sysclasspath(tail); 2677 // -bootclasspath/p: 2678 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2679 jio_fprintf(defaultStream::output_stream(), 2680 "-Xbootclasspath/p is no longer a supported option.\n"); 2681 return JNI_EINVAL; 2682 // -Xrun 2683 } else if (match_option(option, "-Xrun", &tail)) { 2684 if (tail != NULL) { 2685 const char* pos = strchr(tail, ':'); 2686 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2687 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len); 2688 name[len] = '\0'; 2689 2690 char *options = NULL; 2691 if(pos != NULL) { 2692 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2693 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2); 2694 } 2695 #if !INCLUDE_JVMTI 2696 if (strcmp(name, "jdwp") == 0) { 2697 jio_fprintf(defaultStream::error_stream(), 2698 "Debugging agents are not supported in this VM\n"); 2699 return JNI_ERR; 2700 } 2701 #endif // !INCLUDE_JVMTI 2702 add_init_library(name, options); 2703 } 2704 // -agentlib and -agentpath 2705 } else if (match_option(option, "-agentlib:", &tail) || 2706 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2707 if(tail != NULL) { 2708 const char* pos = strchr(tail, '='); 2709 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2710 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len); 2711 name[len] = '\0'; 2712 2713 char *options = NULL; 2714 if(pos != NULL) { 2715 options = os::strdup_check_oom(pos + 1, mtArguments); 2716 } 2717 #if !INCLUDE_JVMTI 2718 if (valid_jdwp_agent(name, is_absolute_path)) { 2719 jio_fprintf(defaultStream::error_stream(), 2720 "Debugging agents are not supported in this VM\n"); 2721 return JNI_ERR; 2722 } 2723 #endif // !INCLUDE_JVMTI 2724 add_init_agent(name, options, is_absolute_path); 2725 } 2726 // -javaagent 2727 } else if (match_option(option, "-javaagent:", &tail)) { 2728 #if !INCLUDE_JVMTI 2729 jio_fprintf(defaultStream::error_stream(), 2730 "Instrumentation agents are not supported in this VM\n"); 2731 return JNI_ERR; 2732 #else 2733 if (tail != NULL) { 2734 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtArguments), tail); 2735 add_init_agent("instrument", options, false); 2736 // java agents need module java.instrument 2737 if (!Arguments::append_to_addmods_property("java.instrument")) { 2738 return JNI_ENOMEM; 2739 } 2740 } 2741 #endif // !INCLUDE_JVMTI 2742 // -Xnoclassgc 2743 } else if (match_option(option, "-Xnoclassgc")) { 2744 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) { 2745 return JNI_EINVAL; 2746 } 2747 // -Xconcgc 2748 } else if (match_option(option, "-Xconcgc")) { 2749 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) { 2750 return JNI_EINVAL; 2751 } 2752 // -Xnoconcgc 2753 } else if (match_option(option, "-Xnoconcgc")) { 2754 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) { 2755 return JNI_EINVAL; 2756 } 2757 // -Xbatch 2758 } else if (match_option(option, "-Xbatch")) { 2759 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 2760 return JNI_EINVAL; 2761 } 2762 // -Xmn for compatibility with other JVM vendors 2763 } else if (match_option(option, "-Xmn", &tail)) { 2764 julong long_initial_young_size = 0; 2765 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2766 if (errcode != arg_in_range) { 2767 jio_fprintf(defaultStream::error_stream(), 2768 "Invalid initial young generation size: %s\n", option->optionString); 2769 describe_range_error(errcode); 2770 return JNI_EINVAL; 2771 } 2772 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2773 return JNI_EINVAL; 2774 } 2775 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2776 return JNI_EINVAL; 2777 } 2778 // -Xms 2779 } else if (match_option(option, "-Xms", &tail)) { 2780 julong long_initial_heap_size = 0; 2781 // an initial heap size of 0 means automatically determine 2782 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2783 if (errcode != arg_in_range) { 2784 jio_fprintf(defaultStream::error_stream(), 2785 "Invalid initial heap size: %s\n", option->optionString); 2786 describe_range_error(errcode); 2787 return JNI_EINVAL; 2788 } 2789 set_min_heap_size((size_t)long_initial_heap_size); 2790 // Currently the minimum size and the initial heap sizes are the same. 2791 // Can be overridden with -XX:InitialHeapSize. 2792 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) { 2793 return JNI_EINVAL; 2794 } 2795 // -Xmx 2796 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2797 julong long_max_heap_size = 0; 2798 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2799 if (errcode != arg_in_range) { 2800 jio_fprintf(defaultStream::error_stream(), 2801 "Invalid maximum heap size: %s\n", option->optionString); 2802 describe_range_error(errcode); 2803 return JNI_EINVAL; 2804 } 2805 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) { 2806 return JNI_EINVAL; 2807 } 2808 // Xmaxf 2809 } else if (match_option(option, "-Xmaxf", &tail)) { 2810 char* err; 2811 int maxf = (int)(strtod(tail, &err) * 100); 2812 if (*err != '\0' || *tail == '\0') { 2813 jio_fprintf(defaultStream::error_stream(), 2814 "Bad max heap free percentage size: %s\n", 2815 option->optionString); 2816 return JNI_EINVAL; 2817 } else { 2818 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) { 2819 return JNI_EINVAL; 2820 } 2821 } 2822 // Xminf 2823 } else if (match_option(option, "-Xminf", &tail)) { 2824 char* err; 2825 int minf = (int)(strtod(tail, &err) * 100); 2826 if (*err != '\0' || *tail == '\0') { 2827 jio_fprintf(defaultStream::error_stream(), 2828 "Bad min heap free percentage size: %s\n", 2829 option->optionString); 2830 return JNI_EINVAL; 2831 } else { 2832 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) { 2833 return JNI_EINVAL; 2834 } 2835 } 2836 // -Xss 2837 } else if (match_option(option, "-Xss", &tail)) { 2838 julong long_ThreadStackSize = 0; 2839 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 2840 if (errcode != arg_in_range) { 2841 jio_fprintf(defaultStream::error_stream(), 2842 "Invalid thread stack size: %s\n", option->optionString); 2843 describe_range_error(errcode); 2844 return JNI_EINVAL; 2845 } 2846 // Internally track ThreadStackSize in units of 1024 bytes. 2847 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, 2848 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) { 2849 return JNI_EINVAL; 2850 } 2851 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads, -Xusealtsigs 2852 } else if (match_option(option, "-Xoss", &tail) || 2853 match_option(option, "-Xsqnopause") || 2854 match_option(option, "-Xoptimize") || 2855 match_option(option, "-Xboundthreads") || 2856 match_option(option, "-Xusealtsigs")) { 2857 // All these options are deprecated in JDK 9 and will be removed in a future release 2858 char version[256]; 2859 JDK_Version::jdk(9).to_string(version, sizeof(version)); 2860 warning("Ignoring option %s; support was removed in %s", option->optionString, version); 2861 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) { 2862 julong long_CodeCacheExpansionSize = 0; 2863 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size()); 2864 if (errcode != arg_in_range) { 2865 jio_fprintf(defaultStream::error_stream(), 2866 "Invalid argument: %s. Must be at least %luK.\n", option->optionString, 2867 os::vm_page_size()/K); 2868 return JNI_EINVAL; 2869 } 2870 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) { 2871 return JNI_EINVAL; 2872 } 2873 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2874 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2875 julong long_ReservedCodeCacheSize = 0; 2876 2877 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2878 if (errcode != arg_in_range) { 2879 jio_fprintf(defaultStream::error_stream(), 2880 "Invalid maximum code cache size: %s.\n", option->optionString); 2881 return JNI_EINVAL; 2882 } 2883 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) { 2884 return JNI_EINVAL; 2885 } 2886 // -XX:NonNMethodCodeHeapSize= 2887 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) { 2888 julong long_NonNMethodCodeHeapSize = 0; 2889 2890 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1); 2891 if (errcode != arg_in_range) { 2892 jio_fprintf(defaultStream::error_stream(), 2893 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString); 2894 return JNI_EINVAL; 2895 } 2896 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) { 2897 return JNI_EINVAL; 2898 } 2899 // -XX:ProfiledCodeHeapSize= 2900 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) { 2901 julong long_ProfiledCodeHeapSize = 0; 2902 2903 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1); 2904 if (errcode != arg_in_range) { 2905 jio_fprintf(defaultStream::error_stream(), 2906 "Invalid maximum profiled code heap size: %s.\n", option->optionString); 2907 return JNI_EINVAL; 2908 } 2909 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) { 2910 return JNI_EINVAL; 2911 } 2912 // -XX:NonProfiledCodeHeapSizee= 2913 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) { 2914 julong long_NonProfiledCodeHeapSize = 0; 2915 2916 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1); 2917 if (errcode != arg_in_range) { 2918 jio_fprintf(defaultStream::error_stream(), 2919 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString); 2920 return JNI_EINVAL; 2921 } 2922 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) { 2923 return JNI_EINVAL; 2924 } 2925 // -green 2926 } else if (match_option(option, "-green")) { 2927 jio_fprintf(defaultStream::error_stream(), 2928 "Green threads support not available\n"); 2929 return JNI_EINVAL; 2930 // -native 2931 } else if (match_option(option, "-native")) { 2932 // HotSpot always uses native threads, ignore silently for compatibility 2933 // -Xrs 2934 } else if (match_option(option, "-Xrs")) { 2935 // Classic/EVM option, new functionality 2936 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) { 2937 return JNI_EINVAL; 2938 } 2939 // -Xprof 2940 } else if (match_option(option, "-Xprof")) { 2941 #if INCLUDE_FPROF 2942 _has_profile = true; 2943 #else // INCLUDE_FPROF 2944 jio_fprintf(defaultStream::error_stream(), 2945 "Flat profiling is not supported in this VM.\n"); 2946 return JNI_ERR; 2947 #endif // INCLUDE_FPROF 2948 // -Xconcurrentio 2949 } else if (match_option(option, "-Xconcurrentio")) { 2950 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) { 2951 return JNI_EINVAL; 2952 } 2953 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 2954 return JNI_EINVAL; 2955 } 2956 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) { 2957 return JNI_EINVAL; 2958 } 2959 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) { 2960 return JNI_EINVAL; 2961 } 2962 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation 2963 return JNI_EINVAL; 2964 } 2965 2966 // -Xinternalversion 2967 } else if (match_option(option, "-Xinternalversion")) { 2968 jio_fprintf(defaultStream::output_stream(), "%s\n", 2969 VM_Version::internal_vm_info_string()); 2970 vm_exit(0); 2971 #ifndef PRODUCT 2972 // -Xprintflags 2973 } else if (match_option(option, "-Xprintflags")) { 2974 CommandLineFlags::printFlags(tty, false); 2975 vm_exit(0); 2976 #endif 2977 // -D 2978 } else if (match_option(option, "-D", &tail)) { 2979 const char* value; 2980 if (match_option(option, "-Djava.endorsed.dirs=", &value) && 2981 *value!= '\0' && strcmp(value, "\"\"") != 0) { 2982 // abort if -Djava.endorsed.dirs is set 2983 jio_fprintf(defaultStream::output_stream(), 2984 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n" 2985 "in modular form will be supported via the concept of upgradeable modules.\n", value); 2986 return JNI_EINVAL; 2987 } 2988 if (match_option(option, "-Djava.ext.dirs=", &value) && 2989 *value != '\0' && strcmp(value, "\"\"") != 0) { 2990 // abort if -Djava.ext.dirs is set 2991 jio_fprintf(defaultStream::output_stream(), 2992 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value); 2993 return JNI_EINVAL; 2994 } 2995 2996 if (!add_property(tail)) { 2997 return JNI_ENOMEM; 2998 } 2999 // Out of the box management support 3000 if (match_option(option, "-Dcom.sun.management", &tail)) { 3001 #if INCLUDE_MANAGEMENT 3002 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) { 3003 return JNI_EINVAL; 3004 } 3005 // management agent in module java.management 3006 if (!Arguments::append_to_addmods_property("java.management")) { 3007 return JNI_ENOMEM; 3008 } 3009 #else 3010 jio_fprintf(defaultStream::output_stream(), 3011 "-Dcom.sun.management is not supported in this VM.\n"); 3012 return JNI_ERR; 3013 #endif 3014 } 3015 if (match_option(option, "-Djdk.launcher.patch.", &tail)) { 3016 // -Djdk.launcher.patch.#=<module>=<file>(<pathsep><file>)* 3017 // The number, #, specified will be increasing with each -Xpatch 3018 // specified on the command line. 3019 // Pick up module name, following the -D property's equal sign. 3020 const char* property_equal = strchr(tail, '='); 3021 if (property_equal == NULL) { 3022 jio_fprintf(defaultStream::output_stream(), "Missing '=' in -Xpatch specification\n"); 3023 return JNI_ERR; 3024 } else { 3025 // Find the equal sign between the module name and the path specification 3026 const char* module_equal = strchr(property_equal + 1, '='); 3027 if (module_equal == NULL) { 3028 jio_fprintf(defaultStream::output_stream(), "Bad value for -Xpatch, no module name specified\n"); 3029 return JNI_ERR; 3030 } else { 3031 // Pick out the module name, in between the two equal signs 3032 size_t module_len = module_equal - property_equal - 1; 3033 char* module_name = NEW_C_HEAP_ARRAY(char, module_len+1, mtArguments); 3034 memcpy(module_name, property_equal + 1, module_len); 3035 *(module_name + module_len) = '\0'; 3036 // The path piece begins one past the module_equal sign 3037 Arguments::add_xpatchprefix(module_name, module_equal + 1, xpatch_javabase); 3038 FREE_C_HEAP_ARRAY(char, module_name); 3039 } 3040 } 3041 } 3042 // -Xint 3043 } else if (match_option(option, "-Xint")) { 3044 set_mode_flags(_int); 3045 // -Xmixed 3046 } else if (match_option(option, "-Xmixed")) { 3047 set_mode_flags(_mixed); 3048 // -Xcomp 3049 } else if (match_option(option, "-Xcomp")) { 3050 // for testing the compiler; turn off all flags that inhibit compilation 3051 set_mode_flags(_comp); 3052 // -Xshare:dump 3053 } else if (match_option(option, "-Xshare:dump")) { 3054 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) { 3055 return JNI_EINVAL; 3056 } 3057 set_mode_flags(_int); // Prevent compilation, which creates objects 3058 // -Xshare:on 3059 } else if (match_option(option, "-Xshare:on")) { 3060 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3061 return JNI_EINVAL; 3062 } 3063 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 3064 return JNI_EINVAL; 3065 } 3066 // -Xshare:auto 3067 } else if (match_option(option, "-Xshare:auto")) { 3068 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3069 return JNI_EINVAL; 3070 } 3071 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 3072 return JNI_EINVAL; 3073 } 3074 // -Xshare:off 3075 } else if (match_option(option, "-Xshare:off")) { 3076 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) { 3077 return JNI_EINVAL; 3078 } 3079 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 3080 return JNI_EINVAL; 3081 } 3082 // -Xverify 3083 } else if (match_option(option, "-Xverify", &tail)) { 3084 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 3085 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) { 3086 return JNI_EINVAL; 3087 } 3088 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 3089 return JNI_EINVAL; 3090 } 3091 } else if (strcmp(tail, ":remote") == 0) { 3092 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 3093 return JNI_EINVAL; 3094 } 3095 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 3096 return JNI_EINVAL; 3097 } 3098 } else if (strcmp(tail, ":none") == 0) { 3099 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 3100 return JNI_EINVAL; 3101 } 3102 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) { 3103 return JNI_EINVAL; 3104 } 3105 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 3106 return JNI_EINVAL; 3107 } 3108 // -Xdebug 3109 } else if (match_option(option, "-Xdebug")) { 3110 // note this flag has been used, then ignore 3111 set_xdebug_mode(true); 3112 // -Xnoagent 3113 } else if (match_option(option, "-Xnoagent")) { 3114 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 3115 } else if (match_option(option, "-Xloggc:", &tail)) { 3116 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename> 3117 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail); 3118 _gc_log_filename = os::strdup_check_oom(tail); 3119 } else if (match_option(option, "-Xlog", &tail)) { 3120 bool ret = false; 3121 if (strcmp(tail, ":help") == 0) { 3122 LogConfiguration::print_command_line_help(defaultStream::output_stream()); 3123 vm_exit(0); 3124 } else if (strcmp(tail, ":disable") == 0) { 3125 LogConfiguration::disable_logging(); 3126 ret = true; 3127 } else if (*tail == '\0') { 3128 ret = LogConfiguration::parse_command_line_arguments(); 3129 assert(ret, "-Xlog without arguments should never fail to parse"); 3130 } else if (*tail == ':') { 3131 ret = LogConfiguration::parse_command_line_arguments(tail + 1); 3132 } 3133 if (ret == false) { 3134 jio_fprintf(defaultStream::error_stream(), 3135 "Invalid -Xlog option '-Xlog%s'\n", 3136 tail); 3137 return JNI_EINVAL; 3138 } 3139 // JNI hooks 3140 } else if (match_option(option, "-Xcheck", &tail)) { 3141 if (!strcmp(tail, ":jni")) { 3142 #if !INCLUDE_JNI_CHECK 3143 warning("JNI CHECKING is not supported in this VM"); 3144 #else 3145 CheckJNICalls = true; 3146 #endif // INCLUDE_JNI_CHECK 3147 } else if (is_bad_option(option, args->ignoreUnrecognized, 3148 "check")) { 3149 return JNI_EINVAL; 3150 } 3151 } else if (match_option(option, "vfprintf")) { 3152 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 3153 } else if (match_option(option, "exit")) { 3154 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 3155 } else if (match_option(option, "abort")) { 3156 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 3157 // -XX:+AggressiveHeap 3158 } else if (match_option(option, "-XX:+AggressiveHeap")) { 3159 jint result = set_aggressive_heap_flags(); 3160 if (result != JNI_OK) { 3161 return result; 3162 } 3163 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 3164 // and the last option wins. 3165 } else if (match_option(option, "-XX:+NeverTenure")) { 3166 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) { 3167 return JNI_EINVAL; 3168 } 3169 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3170 return JNI_EINVAL; 3171 } 3172 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) { 3173 return JNI_EINVAL; 3174 } 3175 } else if (match_option(option, "-XX:+AlwaysTenure")) { 3176 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3177 return JNI_EINVAL; 3178 } 3179 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3180 return JNI_EINVAL; 3181 } 3182 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) { 3183 return JNI_EINVAL; 3184 } 3185 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 3186 uintx max_tenuring_thresh = 0; 3187 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) { 3188 jio_fprintf(defaultStream::error_stream(), 3189 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail); 3190 return JNI_EINVAL; 3191 } 3192 3193 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) { 3194 return JNI_EINVAL; 3195 } 3196 3197 if (MaxTenuringThreshold == 0) { 3198 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3199 return JNI_EINVAL; 3200 } 3201 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3202 return JNI_EINVAL; 3203 } 3204 } else { 3205 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3206 return JNI_EINVAL; 3207 } 3208 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3209 return JNI_EINVAL; 3210 } 3211 } 3212 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) { 3213 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) { 3214 return JNI_EINVAL; 3215 } 3216 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) { 3217 return JNI_EINVAL; 3218 } 3219 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) { 3220 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) { 3221 return JNI_EINVAL; 3222 } 3223 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) { 3224 return JNI_EINVAL; 3225 } 3226 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) { 3227 #if defined(DTRACE_ENABLED) 3228 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) { 3229 return JNI_EINVAL; 3230 } 3231 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) { 3232 return JNI_EINVAL; 3233 } 3234 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) { 3235 return JNI_EINVAL; 3236 } 3237 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) { 3238 return JNI_EINVAL; 3239 } 3240 #else // defined(DTRACE_ENABLED) 3241 jio_fprintf(defaultStream::error_stream(), 3242 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 3243 return JNI_EINVAL; 3244 #endif // defined(DTRACE_ENABLED) 3245 #ifdef ASSERT 3246 } else if (match_option(option, "-XX:+FullGCALot")) { 3247 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) { 3248 return JNI_EINVAL; 3249 } 3250 // disable scavenge before parallel mark-compact 3251 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 3252 return JNI_EINVAL; 3253 } 3254 #endif 3255 #if !INCLUDE_MANAGEMENT 3256 } else if (match_option(option, "-XX:+ManagementServer")) { 3257 jio_fprintf(defaultStream::error_stream(), 3258 "ManagementServer is not supported in this VM.\n"); 3259 return JNI_ERR; 3260 #endif // INCLUDE_MANAGEMENT 3261 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 3262 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have 3263 // already been handled 3264 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) && 3265 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) { 3266 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 3267 return JNI_EINVAL; 3268 } 3269 } 3270 // Unknown option 3271 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 3272 return JNI_ERR; 3273 } 3274 } 3275 3276 // PrintSharedArchiveAndExit will turn on 3277 // -Xshare:on 3278 // -Xlog:class+path=info 3279 if (PrintSharedArchiveAndExit) { 3280 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3281 return JNI_EINVAL; 3282 } 3283 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 3284 return JNI_EINVAL; 3285 } 3286 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path)); 3287 } 3288 3289 // Change the default value for flags which have different default values 3290 // when working with older JDKs. 3291 #ifdef LINUX 3292 if (JDK_Version::current().compare_major(6) <= 0 && 3293 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 3294 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 3295 } 3296 #endif // LINUX 3297 fix_appclasspath(); 3298 return JNI_OK; 3299 } 3300 3301 void Arguments::add_xpatchprefix(const char* module_name, const char* path, bool* xpatch_javabase) { 3302 // For java.base check for duplicate -Xpatch options being specified on the command line. 3303 // This check is only required for java.base, all other duplicate module specifications 3304 // will be checked during module system initialization. The module system initialization 3305 // will throw an ExceptionInInitializerError if this situation occurs. 3306 if (strcmp(module_name, "java.base") == 0) { 3307 if (*xpatch_javabase) { 3308 vm_exit_during_initialization("Cannot specify java.base more than once to -Xpatch"); 3309 } else { 3310 *xpatch_javabase = true; 3311 } 3312 } 3313 3314 // Create GrowableArray lazily, only if -Xpatch has been specified 3315 if (_xpatchprefix == NULL) { 3316 _xpatchprefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModuleXPatchPath*>(10, true); 3317 } 3318 3319 _xpatchprefix->push(new ModuleXPatchPath(module_name, path)); 3320 } 3321 3322 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3323 // 3324 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3325 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3326 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3327 // path is treated as the current directory. 3328 // 3329 // This causes problems with CDS, which requires that all directories specified in the classpath 3330 // must be empty. In most cases, applications do NOT want to load classes from the current 3331 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3332 // scripts compatible with CDS. 3333 void Arguments::fix_appclasspath() { 3334 if (IgnoreEmptyClassPaths) { 3335 const char separator = *os::path_separator(); 3336 const char* src = _java_class_path->value(); 3337 3338 // skip over all the leading empty paths 3339 while (*src == separator) { 3340 src ++; 3341 } 3342 3343 char* copy = os::strdup_check_oom(src, mtArguments); 3344 3345 // trim all trailing empty paths 3346 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3347 *tail = '\0'; 3348 } 3349 3350 char from[3] = {separator, separator, '\0'}; 3351 char to [2] = {separator, '\0'}; 3352 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3353 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3354 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3355 } 3356 3357 _java_class_path->set_writeable_value(copy); 3358 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3359 } 3360 } 3361 3362 static bool has_jar_files(const char* directory) { 3363 DIR* dir = os::opendir(directory); 3364 if (dir == NULL) return false; 3365 3366 struct dirent *entry; 3367 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtArguments); 3368 bool hasJarFile = false; 3369 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 3370 const char* name = entry->d_name; 3371 const char* ext = name + strlen(name) - 4; 3372 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0); 3373 } 3374 FREE_C_HEAP_ARRAY(char, dbuf); 3375 os::closedir(dir); 3376 return hasJarFile ; 3377 } 3378 3379 static int check_non_empty_dirs(const char* path) { 3380 const char separator = *os::path_separator(); 3381 const char* const end = path + strlen(path); 3382 int nonEmptyDirs = 0; 3383 while (path < end) { 3384 const char* tmp_end = strchr(path, separator); 3385 if (tmp_end == NULL) { 3386 if (has_jar_files(path)) { 3387 nonEmptyDirs++; 3388 jio_fprintf(defaultStream::output_stream(), 3389 "Non-empty directory: %s\n", path); 3390 } 3391 path = end; 3392 } else { 3393 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtArguments); 3394 memcpy(dirpath, path, tmp_end - path); 3395 dirpath[tmp_end - path] = '\0'; 3396 if (has_jar_files(dirpath)) { 3397 nonEmptyDirs++; 3398 jio_fprintf(defaultStream::output_stream(), 3399 "Non-empty directory: %s\n", dirpath); 3400 } 3401 FREE_C_HEAP_ARRAY(char, dirpath); 3402 path = tmp_end + 1; 3403 } 3404 } 3405 return nonEmptyDirs; 3406 } 3407 3408 jint Arguments::finalize_vm_init_args() { 3409 // check if the default lib/endorsed directory exists; if so, error 3410 char path[JVM_MAXPATHLEN]; 3411 const char* fileSep = os::file_separator(); 3412 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); 3413 3414 if (CheckEndorsedAndExtDirs) { 3415 int nonEmptyDirs = 0; 3416 // check endorsed directory 3417 nonEmptyDirs += check_non_empty_dirs(path); 3418 // check the extension directories 3419 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs()); 3420 if (nonEmptyDirs > 0) { 3421 return JNI_ERR; 3422 } 3423 } 3424 3425 DIR* dir = os::opendir(path); 3426 if (dir != NULL) { 3427 jio_fprintf(defaultStream::output_stream(), 3428 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n" 3429 "in modular form will be supported via the concept of upgradeable modules.\n"); 3430 os::closedir(dir); 3431 return JNI_ERR; 3432 } 3433 3434 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); 3435 dir = os::opendir(path); 3436 if (dir != NULL) { 3437 jio_fprintf(defaultStream::output_stream(), 3438 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; " 3439 "Use -classpath instead.\n."); 3440 os::closedir(dir); 3441 return JNI_ERR; 3442 } 3443 3444 // This must be done after all arguments have been processed. 3445 // java_compiler() true means set to "NONE" or empty. 3446 if (java_compiler() && !xdebug_mode()) { 3447 // For backwards compatibility, we switch to interpreted mode if 3448 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3449 // not specified. 3450 set_mode_flags(_int); 3451 } 3452 3453 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode), 3454 // but like -Xint, leave compilation thresholds unaffected. 3455 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well. 3456 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) { 3457 set_mode_flags(_int); 3458 } 3459 3460 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3461 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3462 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3463 } 3464 3465 #if !defined(COMPILER2) && !INCLUDE_JVMCI 3466 // Don't degrade server performance for footprint 3467 if (FLAG_IS_DEFAULT(UseLargePages) && 3468 MaxHeapSize < LargePageHeapSizeThreshold) { 3469 // No need for large granularity pages w/small heaps. 3470 // Note that large pages are enabled/disabled for both the 3471 // Java heap and the code cache. 3472 FLAG_SET_DEFAULT(UseLargePages, false); 3473 } 3474 3475 #elif defined(COMPILER2) 3476 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 3477 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 3478 } 3479 #endif 3480 3481 #if !defined(COMPILER2) && !INCLUDE_JVMCI 3482 UNSUPPORTED_OPTION(ProfileInterpreter); 3483 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter)); 3484 #endif 3485 3486 #ifndef TIERED 3487 // Tiered compilation is undefined. 3488 UNSUPPORTED_OPTION(TieredCompilation); 3489 #endif 3490 3491 #if INCLUDE_JVMCI 3492 if (EnableJVMCI && !append_to_addmods_property("jdk.vm.ci")) { 3493 return JNI_ENOMEM; 3494 } 3495 #endif 3496 3497 // If we are running in a headless jre, force java.awt.headless property 3498 // to be true unless the property has already been set. 3499 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. 3500 if (os::is_headless_jre()) { 3501 const char* headless = Arguments::get_property("java.awt.headless"); 3502 if (headless == NULL) { 3503 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS"); 3504 if (headless_env == NULL) { 3505 if (!add_property("java.awt.headless=true")) { 3506 return JNI_ENOMEM; 3507 } 3508 } else { 3509 char buffer[256]; 3510 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env); 3511 if (!add_property(buffer)) { 3512 return JNI_ENOMEM; 3513 } 3514 } 3515 } 3516 } 3517 3518 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) { 3519 // CMS can only be used with ParNew 3520 FLAG_SET_ERGO(bool, UseParNewGC, true); 3521 } 3522 3523 if (!check_vm_args_consistency()) { 3524 return JNI_ERR; 3525 } 3526 3527 return JNI_OK; 3528 } 3529 3530 // Helper class for controlling the lifetime of JavaVMInitArgs 3531 // objects. The contents of the JavaVMInitArgs are guaranteed to be 3532 // deleted on the destruction of the ScopedVMInitArgs object. 3533 class ScopedVMInitArgs : public StackObj { 3534 private: 3535 JavaVMInitArgs _args; 3536 char* _container_name; 3537 bool _is_set; 3538 char* _vm_options_file_arg; 3539 3540 public: 3541 ScopedVMInitArgs(const char *container_name) { 3542 _args.version = JNI_VERSION_1_2; 3543 _args.nOptions = 0; 3544 _args.options = NULL; 3545 _args.ignoreUnrecognized = false; 3546 _container_name = (char *)container_name; 3547 _is_set = false; 3548 _vm_options_file_arg = NULL; 3549 } 3550 3551 // Populates the JavaVMInitArgs object represented by this 3552 // ScopedVMInitArgs object with the arguments in options. The 3553 // allocated memory is deleted by the destructor. If this method 3554 // returns anything other than JNI_OK, then this object is in a 3555 // partially constructed state, and should be abandoned. 3556 jint set_args(GrowableArray<JavaVMOption>* options) { 3557 _is_set = true; 3558 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL( 3559 JavaVMOption, options->length(), mtArguments); 3560 if (options_arr == NULL) { 3561 return JNI_ENOMEM; 3562 } 3563 _args.options = options_arr; 3564 3565 for (int i = 0; i < options->length(); i++) { 3566 options_arr[i] = options->at(i); 3567 options_arr[i].optionString = os::strdup(options_arr[i].optionString); 3568 if (options_arr[i].optionString == NULL) { 3569 // Rely on the destructor to do cleanup. 3570 _args.nOptions = i; 3571 return JNI_ENOMEM; 3572 } 3573 } 3574 3575 _args.nOptions = options->length(); 3576 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3577 return JNI_OK; 3578 } 3579 3580 JavaVMInitArgs* get() { return &_args; } 3581 char* container_name() { return _container_name; } 3582 bool is_set() { return _is_set; } 3583 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; } 3584 char* vm_options_file_arg() { return _vm_options_file_arg; } 3585 3586 void set_vm_options_file_arg(const char *vm_options_file_arg) { 3587 if (_vm_options_file_arg != NULL) { 3588 os::free(_vm_options_file_arg); 3589 } 3590 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg); 3591 } 3592 3593 ~ScopedVMInitArgs() { 3594 if (_vm_options_file_arg != NULL) { 3595 os::free(_vm_options_file_arg); 3596 } 3597 if (_args.options == NULL) return; 3598 for (int i = 0; i < _args.nOptions; i++) { 3599 os::free(_args.options[i].optionString); 3600 } 3601 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options); 3602 } 3603 3604 // Insert options into this option list, to replace option at 3605 // vm_options_file_pos (-XX:VMOptionsFile) 3606 jint insert(const JavaVMInitArgs* args, 3607 const JavaVMInitArgs* args_to_insert, 3608 const int vm_options_file_pos) { 3609 assert(_args.options == NULL, "shouldn't be set yet"); 3610 assert(args_to_insert->nOptions != 0, "there should be args to insert"); 3611 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set"); 3612 3613 int length = args->nOptions + args_to_insert->nOptions - 1; 3614 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) 3615 GrowableArray<JavaVMOption>(length, true); // Construct new option array 3616 for (int i = 0; i < args->nOptions; i++) { 3617 if (i == vm_options_file_pos) { 3618 // insert the new options starting at the same place as the 3619 // -XX:VMOptionsFile option 3620 for (int j = 0; j < args_to_insert->nOptions; j++) { 3621 options->push(args_to_insert->options[j]); 3622 } 3623 } else { 3624 options->push(args->options[i]); 3625 } 3626 } 3627 // make into options array 3628 jint result = set_args(options); 3629 delete options; 3630 return result; 3631 } 3632 }; 3633 3634 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) { 3635 return parse_options_environment_variable("_JAVA_OPTIONS", args); 3636 } 3637 3638 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) { 3639 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args); 3640 } 3641 3642 jint Arguments::parse_options_environment_variable(const char* name, 3643 ScopedVMInitArgs* vm_args) { 3644 char *buffer = ::getenv(name); 3645 3646 // Don't check this environment variable if user has special privileges 3647 // (e.g. unix su command). 3648 if (buffer == NULL || os::have_special_privileges()) { 3649 return JNI_OK; 3650 } 3651 3652 if ((buffer = os::strdup(buffer)) == NULL) { 3653 return JNI_ENOMEM; 3654 } 3655 3656 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args); 3657 3658 os::free(buffer); 3659 return retcode; 3660 } 3661 3662 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) { 3663 // read file into buffer 3664 int fd = ::open(file_name, O_RDONLY); 3665 if (fd < 0) { 3666 jio_fprintf(defaultStream::error_stream(), 3667 "Could not open options file '%s'\n", 3668 file_name); 3669 return JNI_ERR; 3670 } 3671 3672 struct stat stbuf; 3673 int retcode = os::stat(file_name, &stbuf); 3674 if (retcode != 0) { 3675 jio_fprintf(defaultStream::error_stream(), 3676 "Could not stat options file '%s'\n", 3677 file_name); 3678 os::close(fd); 3679 return JNI_ERR; 3680 } 3681 3682 if (stbuf.st_size == 0) { 3683 // tell caller there is no option data and that is ok 3684 os::close(fd); 3685 return JNI_OK; 3686 } 3687 3688 // '+ 1' for NULL termination even with max bytes 3689 size_t bytes_alloc = stbuf.st_size + 1; 3690 3691 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments); 3692 if (NULL == buf) { 3693 jio_fprintf(defaultStream::error_stream(), 3694 "Could not allocate read buffer for options file parse\n"); 3695 os::close(fd); 3696 return JNI_ENOMEM; 3697 } 3698 3699 memset(buf, 0, bytes_alloc); 3700 3701 // Fill buffer 3702 // Use ::read() instead of os::read because os::read() 3703 // might do a thread state transition 3704 // and it is too early for that here 3705 3706 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc); 3707 os::close(fd); 3708 if (bytes_read < 0) { 3709 FREE_C_HEAP_ARRAY(char, buf); 3710 jio_fprintf(defaultStream::error_stream(), 3711 "Could not read options file '%s'\n", file_name); 3712 return JNI_ERR; 3713 } 3714 3715 if (bytes_read == 0) { 3716 // tell caller there is no option data and that is ok 3717 FREE_C_HEAP_ARRAY(char, buf); 3718 return JNI_OK; 3719 } 3720 3721 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args); 3722 3723 FREE_C_HEAP_ARRAY(char, buf); 3724 return retcode; 3725 } 3726 3727 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) { 3728 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array 3729 3730 // some pointers to help with parsing 3731 char *buffer_end = buffer + buf_len; 3732 char *opt_hd = buffer; 3733 char *wrt = buffer; 3734 char *rd = buffer; 3735 3736 // parse all options 3737 while (rd < buffer_end) { 3738 // skip leading white space from the input string 3739 while (rd < buffer_end && isspace(*rd)) { 3740 rd++; 3741 } 3742 3743 if (rd >= buffer_end) { 3744 break; 3745 } 3746 3747 // Remember this is where we found the head of the token. 3748 opt_hd = wrt; 3749 3750 // Tokens are strings of non white space characters separated 3751 // by one or more white spaces. 3752 while (rd < buffer_end && !isspace(*rd)) { 3753 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3754 int quote = *rd; // matching quote to look for 3755 rd++; // don't copy open quote 3756 while (rd < buffer_end && *rd != quote) { 3757 // include everything (even spaces) 3758 // up until the close quote 3759 *wrt++ = *rd++; // copy to option string 3760 } 3761 3762 if (rd < buffer_end) { 3763 rd++; // don't copy close quote 3764 } else { 3765 // did not see closing quote 3766 jio_fprintf(defaultStream::error_stream(), 3767 "Unmatched quote in %s\n", name); 3768 delete options; 3769 return JNI_ERR; 3770 } 3771 } else { 3772 *wrt++ = *rd++; // copy to option string 3773 } 3774 } 3775 3776 // steal a white space character and set it to NULL 3777 *wrt++ = '\0'; 3778 // We now have a complete token 3779 3780 JavaVMOption option; 3781 option.optionString = opt_hd; 3782 option.extraInfo = NULL; 3783 3784 options->append(option); // Fill in option 3785 3786 rd++; // Advance to next character 3787 } 3788 3789 // Fill out JavaVMInitArgs structure. 3790 jint status = vm_args->set_args(options); 3791 3792 delete options; 3793 return status; 3794 } 3795 3796 void Arguments::set_shared_spaces_flags() { 3797 if (DumpSharedSpaces) { 3798 if (Arguments::get_xpatchprefix() != NULL) { 3799 vm_exit_during_initialization( 3800 "Cannot use the following option when dumping the shared archive", "-Xpatch"); 3801 } 3802 3803 if (RequireSharedSpaces) { 3804 warning("Cannot dump shared archive while using shared archive"); 3805 } 3806 UseSharedSpaces = false; 3807 #ifdef _LP64 3808 if (!UseCompressedOops || !UseCompressedClassPointers) { 3809 vm_exit_during_initialization( 3810 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3811 } 3812 } else { 3813 if (!UseCompressedOops || !UseCompressedClassPointers) { 3814 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3815 } 3816 #endif 3817 } 3818 } 3819 3820 // Sharing support 3821 // Construct the path to the archive 3822 static char* get_shared_archive_path() { 3823 char *shared_archive_path; 3824 if (SharedArchiveFile == NULL) { 3825 char jvm_path[JVM_MAXPATHLEN]; 3826 os::jvm_path(jvm_path, sizeof(jvm_path)); 3827 char *end = strrchr(jvm_path, *os::file_separator()); 3828 if (end != NULL) *end = '\0'; 3829 size_t jvm_path_len = strlen(jvm_path); 3830 size_t file_sep_len = strlen(os::file_separator()); 3831 const size_t len = jvm_path_len + file_sep_len + 20; 3832 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments); 3833 if (shared_archive_path != NULL) { 3834 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa", 3835 jvm_path, os::file_separator()); 3836 } 3837 } else { 3838 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments); 3839 } 3840 return shared_archive_path; 3841 } 3842 3843 #ifndef PRODUCT 3844 // Determine whether LogVMOutput should be implicitly turned on. 3845 static bool use_vm_log() { 3846 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3847 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3848 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3849 PrintAssembly || TraceDeoptimization || TraceDependencies || 3850 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3851 return true; 3852 } 3853 3854 #ifdef COMPILER1 3855 if (PrintC1Statistics) { 3856 return true; 3857 } 3858 #endif // COMPILER1 3859 3860 #ifdef COMPILER2 3861 if (PrintOptoAssembly || PrintOptoStatistics) { 3862 return true; 3863 } 3864 #endif // COMPILER2 3865 3866 return false; 3867 } 3868 3869 #endif // PRODUCT 3870 3871 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) { 3872 for (int index = 0; index < args->nOptions; index++) { 3873 const JavaVMOption* option = args->options + index; 3874 const char* tail; 3875 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3876 return true; 3877 } 3878 } 3879 return false; 3880 } 3881 3882 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args, 3883 const char* vm_options_file, 3884 const int vm_options_file_pos, 3885 ScopedVMInitArgs* vm_options_file_args, 3886 ScopedVMInitArgs* args_out) { 3887 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args); 3888 if (code != JNI_OK) { 3889 return code; 3890 } 3891 3892 if (vm_options_file_args->get()->nOptions < 1) { 3893 return JNI_OK; 3894 } 3895 3896 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) { 3897 jio_fprintf(defaultStream::error_stream(), 3898 "A VM options file may not refer to a VM options file. " 3899 "Specification of '-XX:VMOptionsFile=<file-name>' in the " 3900 "options file '%s' in options container '%s' is an error.\n", 3901 vm_options_file_args->vm_options_file_arg(), 3902 vm_options_file_args->container_name()); 3903 return JNI_EINVAL; 3904 } 3905 3906 return args_out->insert(args, vm_options_file_args->get(), 3907 vm_options_file_pos); 3908 } 3909 3910 // Expand -XX:VMOptionsFile found in args_in as needed. 3911 // mod_args and args_out parameters may return values as needed. 3912 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 3913 ScopedVMInitArgs* mod_args, 3914 JavaVMInitArgs** args_out) { 3915 jint code = match_special_option_and_act(args_in, mod_args); 3916 if (code != JNI_OK) { 3917 return code; 3918 } 3919 3920 if (mod_args->is_set()) { 3921 // args_in contains -XX:VMOptionsFile and mod_args contains the 3922 // original options from args_in along with the options expanded 3923 // from the VMOptionsFile. Return a short-hand to the caller. 3924 *args_out = mod_args->get(); 3925 } else { 3926 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in 3927 } 3928 return JNI_OK; 3929 } 3930 3931 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args, 3932 ScopedVMInitArgs* args_out) { 3933 // Remaining part of option string 3934 const char* tail; 3935 ScopedVMInitArgs vm_options_file_args(args_out->container_name()); 3936 3937 for (int index = 0; index < args->nOptions; index++) { 3938 const JavaVMOption* option = args->options + index; 3939 if (ArgumentsExt::process_options(option)) { 3940 continue; 3941 } 3942 if (match_option(option, "-XX:Flags=", &tail)) { 3943 Arguments::set_jvm_flags_file(tail); 3944 continue; 3945 } 3946 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3947 if (vm_options_file_args.found_vm_options_file_arg()) { 3948 jio_fprintf(defaultStream::error_stream(), 3949 "The option '%s' is already specified in the options " 3950 "container '%s' so the specification of '%s' in the " 3951 "same options container is an error.\n", 3952 vm_options_file_args.vm_options_file_arg(), 3953 vm_options_file_args.container_name(), 3954 option->optionString); 3955 return JNI_EINVAL; 3956 } 3957 vm_options_file_args.set_vm_options_file_arg(option->optionString); 3958 // If there's a VMOptionsFile, parse that 3959 jint code = insert_vm_options_file(args, tail, index, 3960 &vm_options_file_args, args_out); 3961 if (code != JNI_OK) { 3962 return code; 3963 } 3964 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg()); 3965 if (args_out->is_set()) { 3966 // The VMOptions file inserted some options so switch 'args' 3967 // to the new set of options, and continue processing which 3968 // preserves "last option wins" semantics. 3969 args = args_out->get(); 3970 // The first option from the VMOptionsFile replaces the 3971 // current option. So we back track to process the 3972 // replacement option. 3973 index--; 3974 } 3975 continue; 3976 } 3977 if (match_option(option, "-XX:+PrintVMOptions")) { 3978 PrintVMOptions = true; 3979 continue; 3980 } 3981 if (match_option(option, "-XX:-PrintVMOptions")) { 3982 PrintVMOptions = false; 3983 continue; 3984 } 3985 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) { 3986 IgnoreUnrecognizedVMOptions = true; 3987 continue; 3988 } 3989 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) { 3990 IgnoreUnrecognizedVMOptions = false; 3991 continue; 3992 } 3993 if (match_option(option, "-XX:+PrintFlagsInitial")) { 3994 CommandLineFlags::printFlags(tty, false); 3995 vm_exit(0); 3996 } 3997 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3998 #if INCLUDE_NMT 3999 // The launcher did not setup nmt environment variable properly. 4000 if (!MemTracker::check_launcher_nmt_support(tail)) { 4001 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 4002 } 4003 4004 // Verify if nmt option is valid. 4005 if (MemTracker::verify_nmt_option()) { 4006 // Late initialization, still in single-threaded mode. 4007 if (MemTracker::tracking_level() >= NMT_summary) { 4008 MemTracker::init(); 4009 } 4010 } else { 4011 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 4012 } 4013 continue; 4014 #else 4015 jio_fprintf(defaultStream::error_stream(), 4016 "Native Memory Tracking is not supported in this VM\n"); 4017 return JNI_ERR; 4018 #endif 4019 } 4020 4021 #ifndef PRODUCT 4022 if (match_option(option, "-XX:+PrintFlagsWithComments")) { 4023 CommandLineFlags::printFlags(tty, true); 4024 vm_exit(0); 4025 } 4026 #endif 4027 } 4028 return JNI_OK; 4029 } 4030 4031 static void print_options(const JavaVMInitArgs *args) { 4032 const char* tail; 4033 for (int index = 0; index < args->nOptions; index++) { 4034 const JavaVMOption *option = args->options + index; 4035 if (match_option(option, "-XX:", &tail)) { 4036 logOption(tail); 4037 } 4038 } 4039 } 4040 4041 bool Arguments::handle_deprecated_print_gc_flags() { 4042 if (PrintGC) { 4043 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead."); 4044 } 4045 if (PrintGCDetails) { 4046 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead."); 4047 } 4048 4049 if (_gc_log_filename != NULL) { 4050 // -Xloggc was used to specify a filename 4051 const char* gc_conf = PrintGCDetails ? "gc*" : "gc"; 4052 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, NULL); 4053 } else if (PrintGC || PrintGCDetails) { 4054 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc)); 4055 } 4056 return true; 4057 } 4058 4059 // Parse entry point called from JNI_CreateJavaVM 4060 4061 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) { 4062 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent"); 4063 4064 // Initialize ranges, constraints and writeables 4065 CommandLineFlagRangeList::init(); 4066 CommandLineFlagConstraintList::init(); 4067 CommandLineFlagWriteableList::init(); 4068 4069 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 4070 const char* hotspotrc = ".hotspotrc"; 4071 bool settings_file_specified = false; 4072 bool needs_hotspotrc_warning = false; 4073 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 4074 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'"); 4075 4076 // Pointers to current working set of containers 4077 JavaVMInitArgs* cur_cmd_args; 4078 JavaVMInitArgs* cur_java_options_args; 4079 JavaVMInitArgs* cur_java_tool_options_args; 4080 4081 // Containers for modified/expanded options 4082 ScopedVMInitArgs mod_cmd_args("cmd_line_args"); 4083 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 4084 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'"); 4085 4086 4087 jint code = 4088 parse_java_tool_options_environment_variable(&initial_java_tool_options_args); 4089 if (code != JNI_OK) { 4090 return code; 4091 } 4092 4093 code = parse_java_options_environment_variable(&initial_java_options_args); 4094 if (code != JNI_OK) { 4095 return code; 4096 } 4097 4098 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(), 4099 &mod_java_tool_options_args, 4100 &cur_java_tool_options_args); 4101 if (code != JNI_OK) { 4102 return code; 4103 } 4104 4105 code = expand_vm_options_as_needed(initial_cmd_args, 4106 &mod_cmd_args, 4107 &cur_cmd_args); 4108 if (code != JNI_OK) { 4109 return code; 4110 } 4111 4112 code = expand_vm_options_as_needed(initial_java_options_args.get(), 4113 &mod_java_options_args, 4114 &cur_java_options_args); 4115 if (code != JNI_OK) { 4116 return code; 4117 } 4118 4119 const char* flags_file = Arguments::get_jvm_flags_file(); 4120 settings_file_specified = (flags_file != NULL); 4121 4122 if (IgnoreUnrecognizedVMOptions) { 4123 cur_cmd_args->ignoreUnrecognized = true; 4124 cur_java_tool_options_args->ignoreUnrecognized = true; 4125 cur_java_options_args->ignoreUnrecognized = true; 4126 } 4127 4128 // Parse specified settings file 4129 if (settings_file_specified) { 4130 if (!process_settings_file(flags_file, true, 4131 cur_cmd_args->ignoreUnrecognized)) { 4132 return JNI_EINVAL; 4133 } 4134 } else { 4135 #ifdef ASSERT 4136 // Parse default .hotspotrc settings file 4137 if (!process_settings_file(".hotspotrc", false, 4138 cur_cmd_args->ignoreUnrecognized)) { 4139 return JNI_EINVAL; 4140 } 4141 #else 4142 struct stat buf; 4143 if (os::stat(hotspotrc, &buf) == 0) { 4144 needs_hotspotrc_warning = true; 4145 } 4146 #endif 4147 } 4148 4149 if (PrintVMOptions) { 4150 print_options(cur_java_tool_options_args); 4151 print_options(cur_cmd_args); 4152 print_options(cur_java_options_args); 4153 } 4154 4155 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 4156 jint result = parse_vm_init_args(cur_java_tool_options_args, 4157 cur_java_options_args, 4158 cur_cmd_args); 4159 4160 if (result != JNI_OK) { 4161 return result; 4162 } 4163 4164 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 4165 SharedArchivePath = get_shared_archive_path(); 4166 if (SharedArchivePath == NULL) { 4167 return JNI_ENOMEM; 4168 } 4169 4170 // Set up VerifySharedSpaces 4171 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 4172 VerifySharedSpaces = true; 4173 } 4174 4175 // Delay warning until here so that we've had a chance to process 4176 // the -XX:-PrintWarnings flag 4177 if (needs_hotspotrc_warning) { 4178 warning("%s file is present but has been ignored. " 4179 "Run with -XX:Flags=%s to load the file.", 4180 hotspotrc, hotspotrc); 4181 } 4182 4183 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 4184 UNSUPPORTED_OPTION(UseLargePages); 4185 #endif 4186 4187 ArgumentsExt::report_unsupported_options(); 4188 4189 #ifndef PRODUCT 4190 if (TraceBytecodesAt != 0) { 4191 TraceBytecodes = true; 4192 } 4193 if (CountCompiledCalls) { 4194 if (UseCounterDecay) { 4195 warning("UseCounterDecay disabled because CountCalls is set"); 4196 UseCounterDecay = false; 4197 } 4198 } 4199 #endif // PRODUCT 4200 4201 if (ScavengeRootsInCode == 0) { 4202 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 4203 warning("Forcing ScavengeRootsInCode non-zero"); 4204 } 4205 ScavengeRootsInCode = 1; 4206 } 4207 4208 if (!handle_deprecated_print_gc_flags()) { 4209 return JNI_EINVAL; 4210 } 4211 4212 // Set object alignment values. 4213 set_object_alignment(); 4214 4215 #if !INCLUDE_CDS 4216 if (DumpSharedSpaces || RequireSharedSpaces) { 4217 jio_fprintf(defaultStream::error_stream(), 4218 "Shared spaces are not supported in this VM\n"); 4219 return JNI_ERR; 4220 } 4221 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) { 4222 warning("Shared spaces are not supported in this VM"); 4223 FLAG_SET_DEFAULT(UseSharedSpaces, false); 4224 FLAG_SET_DEFAULT(PrintSharedSpaces, false); 4225 } 4226 no_shared_spaces("CDS Disabled"); 4227 #endif // INCLUDE_CDS 4228 4229 return JNI_OK; 4230 } 4231 4232 jint Arguments::apply_ergo() { 4233 4234 // Set flags based on ergonomics. 4235 set_ergonomics_flags(); 4236 4237 set_shared_spaces_flags(); 4238 4239 // Check the GC selections again. 4240 if (!check_gc_consistency()) { 4241 return JNI_EINVAL; 4242 } 4243 4244 if (TieredCompilation) { 4245 set_tiered_flags(); 4246 } else { 4247 int max_compilation_policy_choice = 1; 4248 #ifdef COMPILER2 4249 max_compilation_policy_choice = 2; 4250 #endif 4251 // Check if the policy is valid. 4252 if (CompilationPolicyChoice >= max_compilation_policy_choice) { 4253 vm_exit_during_initialization( 4254 "Incompatible compilation policy selected", NULL); 4255 } 4256 // Scale CompileThreshold 4257 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged. 4258 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 4259 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold)); 4260 } 4261 } 4262 4263 #ifdef COMPILER2 4264 #ifndef PRODUCT 4265 if (PrintIdealGraphLevel > 0) { 4266 FLAG_SET_ERGO(bool, PrintIdealGraph, true); 4267 } 4268 #endif 4269 #endif 4270 4271 // Set heap size based on available physical memory 4272 set_heap_size(); 4273 4274 ArgumentsExt::set_gc_specific_flags(); 4275 4276 // Initialize Metaspace flags and alignments 4277 Metaspace::ergo_initialize(); 4278 4279 // Set bytecode rewriting flags 4280 set_bytecode_flags(); 4281 4282 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 4283 jint code = set_aggressive_opts_flags(); 4284 if (code != JNI_OK) { 4285 return code; 4286 } 4287 4288 // Turn off biased locking for locking debug mode flags, 4289 // which are subtly different from each other but neither works with 4290 // biased locking 4291 if (UseHeavyMonitors 4292 #ifdef COMPILER1 4293 || !UseFastLocking 4294 #endif // COMPILER1 4295 #if INCLUDE_JVMCI 4296 || !JVMCIUseFastLocking 4297 #endif 4298 ) { 4299 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 4300 // flag set to true on command line; warn the user that they 4301 // can't enable biased locking here 4302 warning("Biased Locking is not supported with locking debug flags" 4303 "; ignoring UseBiasedLocking flag." ); 4304 } 4305 UseBiasedLocking = false; 4306 } 4307 4308 #ifdef CC_INTERP 4309 // Clear flags not supported on zero. 4310 FLAG_SET_DEFAULT(ProfileInterpreter, false); 4311 FLAG_SET_DEFAULT(UseBiasedLocking, false); 4312 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 4313 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 4314 #endif // CC_INTERP 4315 4316 #ifdef COMPILER2 4317 if (!EliminateLocks) { 4318 EliminateNestedLocks = false; 4319 } 4320 if (!Inline) { 4321 IncrementalInline = false; 4322 } 4323 #ifndef PRODUCT 4324 if (!IncrementalInline) { 4325 AlwaysIncrementalInline = false; 4326 } 4327 #endif 4328 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { 4329 // nothing to use the profiling, turn if off 4330 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 4331 } 4332 #endif 4333 4334 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 4335 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 4336 DebugNonSafepoints = true; 4337 } 4338 4339 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 4340 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 4341 } 4342 4343 if (UseOnStackReplacement && !UseLoopCounter) { 4344 warning("On-stack-replacement requires loop counters; enabling loop counters"); 4345 FLAG_SET_DEFAULT(UseLoopCounter, true); 4346 } 4347 4348 #ifndef PRODUCT 4349 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 4350 if (use_vm_log()) { 4351 LogVMOutput = true; 4352 } 4353 } 4354 #endif // PRODUCT 4355 4356 if (PrintCommandLineFlags) { 4357 CommandLineFlags::printSetFlags(tty); 4358 } 4359 4360 // Apply CPU specific policy for the BiasedLocking 4361 if (UseBiasedLocking) { 4362 if (!VM_Version::use_biased_locking() && 4363 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 4364 UseBiasedLocking = false; 4365 } 4366 } 4367 #ifdef COMPILER2 4368 if (!UseBiasedLocking || EmitSync != 0) { 4369 UseOptoBiasInlining = false; 4370 } 4371 #endif 4372 4373 return JNI_OK; 4374 } 4375 4376 jint Arguments::adjust_after_os() { 4377 if (UseNUMA) { 4378 if (UseParallelGC || UseParallelOldGC) { 4379 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4380 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4381 } 4382 } 4383 // UseNUMAInterleaving is set to ON for all collectors and 4384 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4385 // such as the parallel collector for Linux and Solaris will 4386 // interleave old gen and survivor spaces on top of NUMA 4387 // allocation policy for the eden space. 4388 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4389 // all platforms and ParallelGC on Windows will interleave all 4390 // of the heap spaces across NUMA nodes. 4391 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4392 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4393 } 4394 } 4395 return JNI_OK; 4396 } 4397 4398 int Arguments::PropertyList_count(SystemProperty* pl) { 4399 int count = 0; 4400 while(pl != NULL) { 4401 count++; 4402 pl = pl->next(); 4403 } 4404 return count; 4405 } 4406 4407 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4408 assert(key != NULL, "just checking"); 4409 SystemProperty* prop; 4410 for (prop = pl; prop != NULL; prop = prop->next()) { 4411 if (strcmp(key, prop->key()) == 0) return prop->value(); 4412 } 4413 return NULL; 4414 } 4415 4416 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4417 int count = 0; 4418 const char* ret_val = NULL; 4419 4420 while(pl != NULL) { 4421 if(count >= index) { 4422 ret_val = pl->key(); 4423 break; 4424 } 4425 count++; 4426 pl = pl->next(); 4427 } 4428 4429 return ret_val; 4430 } 4431 4432 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4433 int count = 0; 4434 char* ret_val = NULL; 4435 4436 while(pl != NULL) { 4437 if(count >= index) { 4438 ret_val = pl->value(); 4439 break; 4440 } 4441 count++; 4442 pl = pl->next(); 4443 } 4444 4445 return ret_val; 4446 } 4447 4448 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4449 SystemProperty* p = *plist; 4450 if (p == NULL) { 4451 *plist = new_p; 4452 } else { 4453 while (p->next() != NULL) { 4454 p = p->next(); 4455 } 4456 p->set_next(new_p); 4457 } 4458 } 4459 4460 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) { 4461 if (plist == NULL) 4462 return; 4463 4464 SystemProperty* new_p = new SystemProperty(k, v, true); 4465 PropertyList_add(plist, new_p); 4466 } 4467 4468 void Arguments::PropertyList_add(SystemProperty *element) { 4469 PropertyList_add(&_system_properties, element); 4470 } 4471 4472 // This add maintains unique property key in the list. 4473 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) { 4474 if (plist == NULL) 4475 return; 4476 4477 // If property key exist then update with new value. 4478 SystemProperty* prop; 4479 for (prop = *plist; prop != NULL; prop = prop->next()) { 4480 if (strcmp(k, prop->key()) == 0) { 4481 if (append) { 4482 prop->append_value(v); 4483 } else { 4484 prop->set_writeable_value(v); 4485 } 4486 return; 4487 } 4488 } 4489 4490 PropertyList_add(plist, k, v); 4491 } 4492 4493 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4494 // Returns true if all of the source pointed by src has been copied over to 4495 // the destination buffer pointed by buf. Otherwise, returns false. 4496 // Notes: 4497 // 1. If the length (buflen) of the destination buffer excluding the 4498 // NULL terminator character is not long enough for holding the expanded 4499 // pid characters, it also returns false instead of returning the partially 4500 // expanded one. 4501 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4502 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4503 char* buf, size_t buflen) { 4504 const char* p = src; 4505 char* b = buf; 4506 const char* src_end = &src[srclen]; 4507 char* buf_end = &buf[buflen - 1]; 4508 4509 while (p < src_end && b < buf_end) { 4510 if (*p == '%') { 4511 switch (*(++p)) { 4512 case '%': // "%%" ==> "%" 4513 *b++ = *p++; 4514 break; 4515 case 'p': { // "%p" ==> current process id 4516 // buf_end points to the character before the last character so 4517 // that we could write '\0' to the end of the buffer. 4518 size_t buf_sz = buf_end - b + 1; 4519 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4520 4521 // if jio_snprintf fails or the buffer is not long enough to hold 4522 // the expanded pid, returns false. 4523 if (ret < 0 || ret >= (int)buf_sz) { 4524 return false; 4525 } else { 4526 b += ret; 4527 assert(*b == '\0', "fail in copy_expand_pid"); 4528 if (p == src_end && b == buf_end + 1) { 4529 // reach the end of the buffer. 4530 return true; 4531 } 4532 } 4533 p++; 4534 break; 4535 } 4536 default : 4537 *b++ = '%'; 4538 } 4539 } else { 4540 *b++ = *p++; 4541 } 4542 } 4543 *b = '\0'; 4544 return (p == src_end); // return false if not all of the source was copied 4545 }