1 /* 2 * Copyright (c) 1997, 2017, 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/moduleEntry.hpp" 29 #include "classfile/stringTable.hpp" 30 #include "classfile/symbolTable.hpp" 31 #include "gc/shared/gc.hpp" 32 #include "gc/shared/gcFactory.hpp" 33 #include "gc/shared/genCollectedHeap.hpp" 34 #include "gc/shared/referenceProcessor.hpp" 35 #include "gc/shared/taskqueue.hpp" 36 #include "logging/log.hpp" 37 #include "logging/logConfiguration.hpp" 38 #include "logging/logStream.hpp" 39 #include "logging/logTag.hpp" 40 #include "memory/allocation.inline.hpp" 41 #include "memory/universe.inline.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "prims/jvm.h" 44 #include "prims/jvmtiExport.hpp" 45 #include "runtime/arguments.hpp" 46 #include "runtime/arguments_ext.hpp" 47 #include "runtime/commandLineFlagConstraintList.hpp" 48 #include "runtime/commandLineFlagWriteableList.hpp" 49 #include "runtime/commandLineFlagRangeList.hpp" 50 #include "runtime/globals.hpp" 51 #include "runtime/globals_extension.hpp" 52 #include "runtime/java.hpp" 53 #include "runtime/os.hpp" 54 #include "runtime/vm_version.hpp" 55 #include "services/management.hpp" 56 #include "services/memTracker.hpp" 57 #include "utilities/align.hpp" 58 #include "utilities/defaultStream.hpp" 59 #include "utilities/macros.hpp" 60 #include "utilities/stringUtils.hpp" 61 #if INCLUDE_JVMCI 62 #include "jvmci/jvmciRuntime.hpp" 63 #endif 64 65 // Note: This is a special bug reporting site for the JVM 66 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp" 67 #define DEFAULT_JAVA_LAUNCHER "generic" 68 69 char* Arguments::_jvm_flags_file = NULL; 70 char** Arguments::_jvm_flags_array = NULL; 71 int Arguments::_num_jvm_flags = 0; 72 char** Arguments::_jvm_args_array = NULL; 73 int Arguments::_num_jvm_args = 0; 74 char* Arguments::_java_command = NULL; 75 SystemProperty* Arguments::_system_properties = NULL; 76 const char* Arguments::_gc_log_filename = NULL; 77 size_t Arguments::_conservative_max_heap_alignment = 0; 78 size_t Arguments::_min_heap_size = 0; 79 Arguments::Mode Arguments::_mode = _mixed; 80 bool Arguments::_java_compiler = false; 81 bool Arguments::_xdebug_mode = false; 82 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 83 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 84 int Arguments::_sun_java_launcher_pid = -1; 85 bool Arguments::_sun_java_launcher_is_altjvm = false; 86 87 // These parameters are reset in method parse_vm_init_args() 88 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 89 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 90 bool Arguments::_BackgroundCompilation = BackgroundCompilation; 91 bool Arguments::_ClipInlining = ClipInlining; 92 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 93 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 94 95 char* Arguments::SharedArchivePath = NULL; 96 97 AgentLibraryList Arguments::_libraryList; 98 AgentLibraryList Arguments::_agentList; 99 100 abort_hook_t Arguments::_abort_hook = NULL; 101 exit_hook_t Arguments::_exit_hook = NULL; 102 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 103 104 105 SystemProperty *Arguments::_sun_boot_library_path = NULL; 106 SystemProperty *Arguments::_java_library_path = NULL; 107 SystemProperty *Arguments::_java_home = NULL; 108 SystemProperty *Arguments::_java_class_path = NULL; 109 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL; 110 111 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL; 112 PathString *Arguments::_system_boot_class_path = NULL; 113 bool Arguments::_has_jimage = false; 114 115 char* Arguments::_ext_dirs = NULL; 116 117 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining 118 // part of the option string. 119 static bool match_option(const JavaVMOption *option, const char* name, 120 const char** tail) { 121 size_t len = strlen(name); 122 if (strncmp(option->optionString, name, len) == 0) { 123 *tail = option->optionString + len; 124 return true; 125 } else { 126 return false; 127 } 128 } 129 130 // Check if 'option' matches 'name'. No "tail" is allowed. 131 static bool match_option(const JavaVMOption *option, const char* name) { 132 const char* tail = NULL; 133 bool result = match_option(option, name, &tail); 134 if (tail != NULL && *tail == '\0') { 135 return result; 136 } else { 137 return false; 138 } 139 } 140 141 // Return true if any of the strings in null-terminated array 'names' matches. 142 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 143 // the option must match exactly. 144 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 145 bool tail_allowed) { 146 for (/* empty */; *names != NULL; ++names) { 147 if (match_option(option, *names, tail)) { 148 if (**tail == '\0' || (tail_allowed && **tail == ':')) { 149 return true; 150 } 151 } 152 } 153 return false; 154 } 155 156 static void logOption(const char* opt) { 157 if (PrintVMOptions) { 158 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 159 } 160 } 161 162 bool needs_module_property_warning = false; 163 164 #define MODULE_PROPERTY_PREFIX "jdk.module." 165 #define MODULE_PROPERTY_PREFIX_LEN 11 166 #define ADDEXPORTS "addexports" 167 #define ADDEXPORTS_LEN 10 168 #define ADDREADS "addreads" 169 #define ADDREADS_LEN 8 170 #define ADDOPENS "addopens" 171 #define ADDOPENS_LEN 8 172 #define PATCH "patch" 173 #define PATCH_LEN 5 174 #define ADDMODS "addmods" 175 #define ADDMODS_LEN 7 176 #define LIMITMODS "limitmods" 177 #define LIMITMODS_LEN 9 178 #define PATH "path" 179 #define PATH_LEN 4 180 #define UPGRADE_PATH "upgrade.path" 181 #define UPGRADE_PATH_LEN 12 182 183 // Return TRUE if option matches 'property', or 'property=', or 'property.'. 184 static bool matches_property_suffix(const char* option, const char* property, size_t len) { 185 return ((strncmp(option, property, len) == 0) && 186 (option[len] == '=' || option[len] == '.' || option[len] == '\0')); 187 } 188 189 // Return true if property starts with "jdk.module." and its ensuing chars match 190 // any of the reserved module properties. 191 // property should be passed without the leading "-D". 192 bool Arguments::is_internal_module_property(const char* property) { 193 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D"); 194 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) { 195 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN; 196 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) || 197 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) || 198 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) || 199 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) || 200 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) || 201 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) || 202 matches_property_suffix(property_suffix, PATH, PATH_LEN) || 203 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) { 204 return true; 205 } 206 } 207 return false; 208 } 209 210 // Process java launcher properties. 211 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 212 // See if sun.java.launcher, sun.java.launcher.is_altjvm or 213 // sun.java.launcher.pid is defined. 214 // Must do this before setting up other system properties, 215 // as some of them may depend on launcher type. 216 for (int index = 0; index < args->nOptions; index++) { 217 const JavaVMOption* option = args->options + index; 218 const char* tail; 219 220 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 221 process_java_launcher_argument(tail, option->extraInfo); 222 continue; 223 } 224 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { 225 if (strcmp(tail, "true") == 0) { 226 _sun_java_launcher_is_altjvm = true; 227 } 228 continue; 229 } 230 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 231 _sun_java_launcher_pid = atoi(tail); 232 continue; 233 } 234 } 235 } 236 237 // Initialize system properties key and value. 238 void Arguments::init_system_properties() { 239 240 // Set up _system_boot_class_path which is not a property but 241 // relies heavily on argument processing and the jdk.boot.class.path.append 242 // property. It is used to store the underlying system boot class path. 243 _system_boot_class_path = new PathString(NULL); 244 245 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 246 "Java Virtual Machine Specification", false)); 247 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 248 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 249 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 250 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false)); 251 252 // Following are JVMTI agent writable properties. 253 // Properties values are set to NULL and they are 254 // os specific they are initialized in os::init_system_properties_values(). 255 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 256 _java_library_path = new SystemProperty("java.library.path", NULL, true); 257 _java_home = new SystemProperty("java.home", NULL, true); 258 _java_class_path = new SystemProperty("java.class.path", "", true); 259 // jdk.boot.class.path.append is a non-writeable, internal property. 260 // It can only be set by either: 261 // - -Xbootclasspath/a: 262 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase 263 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true); 264 265 // Add to System Property list. 266 PropertyList_add(&_system_properties, _sun_boot_library_path); 267 PropertyList_add(&_system_properties, _java_library_path); 268 PropertyList_add(&_system_properties, _java_home); 269 PropertyList_add(&_system_properties, _java_class_path); 270 PropertyList_add(&_system_properties, _jdk_boot_class_path_append); 271 272 // Set OS specific system properties values 273 os::init_system_properties_values(); 274 } 275 276 // Update/Initialize System properties after JDK version number is known 277 void Arguments::init_version_specific_system_properties() { 278 enum { bufsz = 16 }; 279 char buffer[bufsz]; 280 const char* spec_vendor = "Oracle Corporation"; 281 uint32_t spec_version = JDK_Version::current().major_version(); 282 283 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version); 284 285 PropertyList_add(&_system_properties, 286 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); 287 PropertyList_add(&_system_properties, 288 new SystemProperty("java.vm.specification.version", buffer, false)); 289 PropertyList_add(&_system_properties, 290 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 291 } 292 293 /* 294 * -XX argument processing: 295 * 296 * -XX arguments are defined in several places, such as: 297 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp. 298 * -XX arguments are parsed in parse_argument(). 299 * -XX argument bounds checking is done in check_vm_args_consistency(). 300 * 301 * Over time -XX arguments may change. There are mechanisms to handle common cases: 302 * 303 * ALIASED: An option that is simply another name for another option. This is often 304 * part of the process of deprecating a flag, but not all aliases need 305 * to be deprecated. 306 * 307 * Create an alias for an option by adding the old and new option names to the 308 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc). 309 * 310 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that 311 * support may be removed in the future. Both regular and aliased options may be 312 * deprecated. 313 * 314 * Add a deprecation warning for an option (or alias) by adding an entry in the 315 * "special_jvm_flags" table and setting the "deprecated_in" field. 316 * Often an option "deprecated" in one major release will 317 * be made "obsolete" in the next. In this case the entry should also have its 318 * "obsolete_in" field set. 319 * 320 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted 321 * on the command line. A warning is printed to let the user know that option might not 322 * be accepted in the future. 323 * 324 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags" 325 * table and setting the "obsolete_in" field. 326 * 327 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal 328 * to the current JDK version. The system will flatly refuse to admit the existence of 329 * the flag. This allows a flag to die automatically over JDK releases. 330 * 331 * Note that manual cleanup of expired options should be done at major JDK version upgrades: 332 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables. 333 * - Newly obsolete or expired deprecated options should have their global variable 334 * definitions removed (from globals.hpp, etc) and related implementations removed. 335 * 336 * Recommended approach for removing options: 337 * 338 * To remove options commonly used by customers (e.g. product, commercial -XX options), use 339 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns. 340 * 341 * To remove internal options (e.g. diagnostic, experimental, develop options), use 342 * a 2-step model adding major release numbers to the obsolete and expire columns. 343 * 344 * To change the name of an option, use the alias table as well as a 2-step 345 * model adding major release numbers to the deprecate and expire columns. 346 * Think twice about aliasing commonly used customer options. 347 * 348 * There are times when it is appropriate to leave a future release number as undefined. 349 * 350 * Tests: Aliases should be tested in VMAliasOptions.java. 351 * Deprecated options should be tested in VMDeprecatedOptions.java. 352 */ 353 354 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The 355 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both. 356 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on 357 // the command-line as usual, but will issue a warning. 358 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on 359 // the command-line, while issuing a warning and ignoring the flag value. 360 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the 361 // existence of the flag. 362 // 363 // MANUAL CLEANUP ON JDK VERSION UPDATES: 364 // This table ensures that the handling of options will update automatically when the JDK 365 // version is incremented, but the source code needs to be cleanup up manually: 366 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals" 367 // variable should be removed, as well as users of the variable. 368 // - As "deprecated" options age into "obsolete" options, move the entry into the 369 // "Obsolete Flags" section of the table. 370 // - All expired options should be removed from the table. 371 static SpecialFlag const special_jvm_flags[] = { 372 // -------------- Deprecated Flags -------------- 373 // --- Non-alias flags - sorted by obsolete_in then expired_in: 374 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 375 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 376 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() }, 377 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() }, 378 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 379 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 380 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 381 382 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in: 383 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, 384 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 385 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 386 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() }, 387 388 // -------------- Obsolete Flags - sorted by expired_in -------------- 389 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 390 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 391 { "MinSleepInterval", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, 392 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 393 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() }, 394 395 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS 396 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() }, 397 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) }, 398 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) }, 399 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) }, 400 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 401 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, 402 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() }, 403 #endif 404 405 { NULL, JDK_Version(0), JDK_Version(0) } 406 }; 407 408 // Flags that are aliases for other flags. 409 typedef struct { 410 const char* alias_name; 411 const char* real_name; 412 } AliasedFlag; 413 414 static AliasedFlag const aliased_jvm_flags[] = { 415 { "DefaultMaxRAMFraction", "MaxRAMFraction" }, 416 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" }, 417 { NULL, NULL} 418 }; 419 420 // NOTE: A compatibility request will be necessary for each alias to be removed. 421 static AliasedLoggingFlag const aliased_logging_flags[] = { 422 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) }, 423 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) }, 424 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) }, 425 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) }, 426 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) }, 427 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) }, 428 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) }, 429 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) }, 430 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) }, 431 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) }, 432 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) }, 433 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) }, 434 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) }, 435 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) }, 436 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) } 437 }; 438 439 #ifndef PRODUCT 440 // These options are removed in jdk9. Remove this code for jdk10. 441 static AliasedFlag const removed_develop_logging_flags[] = { 442 { "TraceClassInitialization", "-Xlog:class+init" }, 443 { "TraceClassLoaderData", "-Xlog:class+loader+data" }, 444 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" }, 445 { "TraceItables", "-Xlog:itables=debug" }, 446 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" }, 447 { "TraceSafepoint", "-Xlog:safepoint=debug" }, 448 { "TraceStartupTime", "-Xlog:startuptime" }, 449 { "TraceVMOperation", "-Xlog:vmoperation=debug" }, 450 { "PrintVtables", "-Xlog:vtables=debug" }, 451 { "VerboseVerification", "-Xlog:verification" }, 452 { NULL, NULL } 453 }; 454 #endif //PRODUCT 455 456 // Return true if "v" is less than "other", where "other" may be "undefined". 457 static bool version_less_than(JDK_Version v, JDK_Version other) { 458 assert(!v.is_undefined(), "must be defined"); 459 if (!other.is_undefined() && v.compare(other) >= 0) { 460 return false; 461 } else { 462 return true; 463 } 464 } 465 466 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag); 467 468 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) { 469 // Allow extensions to have priority 470 if (lookup_special_flag_ext(flag_name, flag)) { 471 return true; 472 } 473 474 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 475 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 476 flag = special_jvm_flags[i]; 477 return true; 478 } 479 } 480 return false; 481 } 482 483 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) { 484 assert(version != NULL, "Must provide a version buffer"); 485 SpecialFlag flag; 486 if (lookup_special_flag(flag_name, flag)) { 487 if (!flag.obsolete_in.is_undefined()) { 488 if (version_less_than(JDK_Version::current(), flag.expired_in)) { 489 *version = flag.obsolete_in; 490 return true; 491 } 492 } 493 } 494 return false; 495 } 496 497 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) { 498 assert(version != NULL, "Must provide a version buffer"); 499 SpecialFlag flag; 500 if (lookup_special_flag(flag_name, flag)) { 501 if (!flag.deprecated_in.is_undefined()) { 502 if (version_less_than(JDK_Version::current(), flag.obsolete_in) && 503 version_less_than(JDK_Version::current(), flag.expired_in)) { 504 *version = flag.deprecated_in; 505 return 1; 506 } else { 507 return -1; 508 } 509 } 510 } 511 return 0; 512 } 513 514 #ifndef PRODUCT 515 const char* Arguments::removed_develop_logging_flag_name(const char* name){ 516 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) { 517 const AliasedFlag& flag = removed_develop_logging_flags[i]; 518 if (strcmp(flag.alias_name, name) == 0) { 519 return flag.real_name; 520 } 521 } 522 return NULL; 523 } 524 #endif // PRODUCT 525 526 const char* Arguments::real_flag_name(const char *flag_name) { 527 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) { 528 const AliasedFlag& flag_status = aliased_jvm_flags[i]; 529 if (strcmp(flag_status.alias_name, flag_name) == 0) { 530 return flag_status.real_name; 531 } 532 } 533 return flag_name; 534 } 535 536 #ifdef ASSERT 537 static bool lookup_special_flag(const char *flag_name, size_t skip_index) { 538 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 539 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) { 540 return true; 541 } 542 } 543 return false; 544 } 545 546 static bool verify_special_jvm_flags() { 547 bool success = true; 548 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) { 549 const SpecialFlag& flag = special_jvm_flags[i]; 550 if (lookup_special_flag(flag.name, i)) { 551 warning("Duplicate special flag declaration \"%s\"", flag.name); 552 success = false; 553 } 554 if (flag.deprecated_in.is_undefined() && 555 flag.obsolete_in.is_undefined()) { 556 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name); 557 success = false; 558 } 559 560 if (!flag.deprecated_in.is_undefined()) { 561 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) { 562 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name); 563 success = false; 564 } 565 566 if (!version_less_than(flag.deprecated_in, flag.expired_in)) { 567 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name); 568 success = false; 569 } 570 } 571 572 if (!flag.obsolete_in.is_undefined()) { 573 if (!version_less_than(flag.obsolete_in, flag.expired_in)) { 574 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name); 575 success = false; 576 } 577 578 // if flag has become obsolete it should not have a "globals" flag defined anymore. 579 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { 580 if (Flag::find_flag(flag.name) != NULL) { 581 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name); 582 success = false; 583 } 584 } 585 } 586 587 if (!flag.expired_in.is_undefined()) { 588 // if flag has become expired it should not have a "globals" flag defined anymore. 589 if (!version_less_than(JDK_Version::current(), flag.expired_in)) { 590 if (Flag::find_flag(flag.name) != NULL) { 591 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name); 592 success = false; 593 } 594 } 595 } 596 597 } 598 return success; 599 } 600 #endif 601 602 // Parses a size specification string. 603 bool Arguments::atojulong(const char *s, julong* result) { 604 julong n = 0; 605 606 // First char must be a digit. Don't allow negative numbers or leading spaces. 607 if (!isdigit(*s)) { 608 return false; 609 } 610 611 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); 612 char* remainder; 613 errno = 0; 614 n = strtoull(s, &remainder, (is_hex ? 16 : 10)); 615 if (errno != 0) { 616 return false; 617 } 618 619 // Fail if no number was read at all or if the remainder contains more than a single non-digit character. 620 if (remainder == s || strlen(remainder) > 1) { 621 return false; 622 } 623 624 switch (*remainder) { 625 case 'T': case 't': 626 *result = n * G * K; 627 // Check for overflow. 628 if (*result/((julong)G * K) != n) return false; 629 return true; 630 case 'G': case 'g': 631 *result = n * G; 632 if (*result/G != n) return false; 633 return true; 634 case 'M': case 'm': 635 *result = n * M; 636 if (*result/M != n) return false; 637 return true; 638 case 'K': case 'k': 639 *result = n * K; 640 if (*result/K != n) return false; 641 return true; 642 case '\0': 643 *result = n; 644 return true; 645 default: 646 return false; 647 } 648 } 649 650 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) { 651 if (size < min_size) return arg_too_small; 652 if (size > max_size) return arg_too_big; 653 return arg_in_range; 654 } 655 656 // Describe an argument out of range error 657 void Arguments::describe_range_error(ArgsRange errcode) { 658 switch(errcode) { 659 case arg_too_big: 660 jio_fprintf(defaultStream::error_stream(), 661 "The specified size exceeds the maximum " 662 "representable size.\n"); 663 break; 664 case arg_too_small: 665 case arg_unreadable: 666 case arg_in_range: 667 // do nothing for now 668 break; 669 default: 670 ShouldNotReachHere(); 671 } 672 } 673 674 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) { 675 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) { 676 return true; 677 } else { 678 return false; 679 } 680 } 681 682 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) { 683 char* end; 684 errno = 0; 685 double v = strtod(value, &end); 686 if ((errno != 0) || (*end != 0)) { 687 return false; 688 } 689 690 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) { 691 return true; 692 } 693 return false; 694 } 695 696 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) { 697 julong v; 698 int int_v; 699 intx intx_v; 700 bool is_neg = false; 701 Flag* result = Flag::find_flag(name, strlen(name)); 702 703 if (result == NULL) { 704 return false; 705 } 706 707 // Check the sign first since atojulong() parses only unsigned values. 708 if (*value == '-') { 709 if (!result->is_intx() && !result->is_int()) { 710 return false; 711 } 712 value++; 713 is_neg = true; 714 } 715 if (!Arguments::atojulong(value, &v)) { 716 return false; 717 } 718 if (result->is_int()) { 719 int_v = (int) v; 720 if (is_neg) { 721 int_v = -int_v; 722 } 723 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS; 724 } else if (result->is_uint()) { 725 uint uint_v = (uint) v; 726 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS; 727 } else if (result->is_intx()) { 728 intx_v = (intx) v; 729 if (is_neg) { 730 intx_v = -intx_v; 731 } 732 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS; 733 } else if (result->is_uintx()) { 734 uintx uintx_v = (uintx) v; 735 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS; 736 } else if (result->is_uint64_t()) { 737 uint64_t uint64_t_v = (uint64_t) v; 738 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS; 739 } else if (result->is_size_t()) { 740 size_t size_t_v = (size_t) v; 741 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS; 742 } else if (result->is_double()) { 743 double double_v = (double) v; 744 return CommandLineFlags::doubleAtPut(result, &double_v, origin) == Flag::SUCCESS; 745 } else { 746 return false; 747 } 748 } 749 750 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) { 751 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false; 752 // Contract: CommandLineFlags always returns a pointer that needs freeing. 753 FREE_C_HEAP_ARRAY(char, value); 754 return true; 755 } 756 757 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) { 758 const char* old_value = ""; 759 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false; 760 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 761 size_t new_len = strlen(new_value); 762 const char* value; 763 char* free_this_too = NULL; 764 if (old_len == 0) { 765 value = new_value; 766 } else if (new_len == 0) { 767 value = old_value; 768 } else { 769 size_t length = old_len + 1 + new_len + 1; 770 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments); 771 // each new setting adds another LINE to the switch: 772 jio_snprintf(buf, length, "%s\n%s", old_value, new_value); 773 value = buf; 774 free_this_too = buf; 775 } 776 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 777 // CommandLineFlags always returns a pointer that needs freeing. 778 FREE_C_HEAP_ARRAY(char, value); 779 if (free_this_too != NULL) { 780 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 781 FREE_C_HEAP_ARRAY(char, free_this_too); 782 } 783 return true; 784 } 785 786 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) { 787 const char* real_name = real_flag_name(arg); 788 JDK_Version since = JDK_Version(); 789 switch (is_deprecated_flag(arg, &since)) { 790 case -1: 791 return NULL; // obsolete or expired, don't process normally 792 case 0: 793 return real_name; 794 case 1: { 795 if (warn) { 796 char version[256]; 797 since.to_string(version, sizeof(version)); 798 if (real_name != arg) { 799 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.", 800 arg, version, real_name); 801 } else { 802 warning("Option %s was deprecated in version %s and will likely be removed in a future release.", 803 arg, version); 804 } 805 } 806 return real_name; 807 } 808 } 809 ShouldNotReachHere(); 810 return NULL; 811 } 812 813 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) { 814 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5}; 815 // Set tagset string buffer at max size of 256, large enough for any alias tagset 816 const int max_tagset_size = 256; 817 int max_tagset_len = max_tagset_size - 1; 818 char tagset_buffer[max_tagset_size]; 819 tagset_buffer[0] = '\0'; 820 821 // Write tag-set for aliased logging option, in string list form 822 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]); 823 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) { 824 if (i > 0) { 825 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer)); 826 } 827 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer)); 828 } 829 if (!alf.exactMatch) { 830 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer)); 831 } 832 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.", 833 (on) ? "+" : "-", 834 name, 835 tagset_buffer, 836 (on) ? LogLevel::name(alf.level) : "off"); 837 } 838 839 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){ 840 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) { 841 const AliasedLoggingFlag& alf = aliased_logging_flags[i]; 842 if (strcmp(alf.alias_name, name) == 0) { 843 log_deprecated_flag(name, on, alf); 844 return alf; 845 } 846 } 847 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)}; 848 return a; 849 } 850 851 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) { 852 853 // range of acceptable characters spelled out for portability reasons 854 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 855 #define BUFLEN 255 856 char name[BUFLEN+1]; 857 char dummy; 858 const char* real_name; 859 bool warn_if_deprecated = true; 860 861 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 862 AliasedLoggingFlag alf = catch_logging_aliases(name, false); 863 if (alf.alias_name != NULL){ 864 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 865 return true; 866 } 867 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 868 if (real_name == NULL) { 869 return false; 870 } 871 return set_bool_flag(real_name, false, origin); 872 } 873 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 874 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 875 if (alf.alias_name != NULL){ 876 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 877 return true; 878 } 879 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 880 if (real_name == NULL) { 881 return false; 882 } 883 return set_bool_flag(real_name, true, origin); 884 } 885 886 char punct; 887 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 888 const char* value = strchr(arg, '=') + 1; 889 Flag* flag; 890 891 // this scanf pattern matches both strings (handled here) and numbers (handled later)) 892 AliasedLoggingFlag alf = catch_logging_aliases(name, true); 893 if (alf.alias_name != NULL) { 894 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5); 895 return true; 896 } 897 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 898 if (real_name == NULL) { 899 return false; 900 } 901 flag = Flag::find_flag(real_name); 902 if (flag != NULL && flag->is_ccstr()) { 903 if (flag->ccstr_accumulates()) { 904 return append_to_string_flag(real_name, value, origin); 905 } else { 906 if (value[0] == '\0') { 907 value = NULL; 908 } 909 return set_string_flag(real_name, value, origin); 910 } 911 } else { 912 warn_if_deprecated = false; // if arg is deprecated, we've already done warning... 913 } 914 } 915 916 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 917 const char* value = strchr(arg, '=') + 1; 918 // -XX:Foo:=xxx will reset the string flag to the given value. 919 if (value[0] == '\0') { 920 value = NULL; 921 } 922 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 923 if (real_name == NULL) { 924 return false; 925 } 926 return set_string_flag(real_name, value, origin); 927 } 928 929 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]" 930 #define SIGNED_NUMBER_RANGE "[-0123456789]" 931 #define NUMBER_RANGE "[0123456789eE+-]" 932 char value[BUFLEN + 1]; 933 char value2[BUFLEN + 1]; 934 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 935 // Looks like a floating-point number -- try again with more lenient format string 936 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 937 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 938 if (real_name == NULL) { 939 return false; 940 } 941 return set_fp_numeric_flag(real_name, value, origin); 942 } 943 } 944 945 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 946 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 947 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); 948 if (real_name == NULL) { 949 return false; 950 } 951 return set_numeric_flag(real_name, value, origin); 952 } 953 954 return false; 955 } 956 957 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 958 assert(bldarray != NULL, "illegal argument"); 959 960 if (arg == NULL) { 961 return; 962 } 963 964 int new_count = *count + 1; 965 966 // expand the array and add arg to the last element 967 if (*bldarray == NULL) { 968 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments); 969 } else { 970 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments); 971 } 972 (*bldarray)[*count] = os::strdup_check_oom(arg); 973 *count = new_count; 974 } 975 976 void Arguments::build_jvm_args(const char* arg) { 977 add_string(&_jvm_args_array, &_num_jvm_args, arg); 978 } 979 980 void Arguments::build_jvm_flags(const char* arg) { 981 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 982 } 983 984 // utility function to return a string that concatenates all 985 // strings in a given char** array 986 const char* Arguments::build_resource_string(char** args, int count) { 987 if (args == NULL || count == 0) { 988 return NULL; 989 } 990 size_t length = 0; 991 for (int i = 0; i < count; i++) { 992 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character 993 } 994 char* s = NEW_RESOURCE_ARRAY(char, length); 995 char* dst = s; 996 for (int j = 0; j < count; j++) { 997 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character 998 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character 999 dst += offset; 1000 length -= offset; 1001 } 1002 return (const char*) s; 1003 } 1004 1005 void Arguments::print_on(outputStream* st) { 1006 st->print_cr("VM Arguments:"); 1007 if (num_jvm_flags() > 0) { 1008 st->print("jvm_flags: "); print_jvm_flags_on(st); 1009 st->cr(); 1010 } 1011 if (num_jvm_args() > 0) { 1012 st->print("jvm_args: "); print_jvm_args_on(st); 1013 st->cr(); 1014 } 1015 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 1016 if (_java_class_path != NULL) { 1017 char* path = _java_class_path->value(); 1018 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 1019 } 1020 st->print_cr("Launcher Type: %s", _sun_java_launcher); 1021 } 1022 1023 void Arguments::print_summary_on(outputStream* st) { 1024 // Print the command line. Environment variables that are helpful for 1025 // reproducing the problem are written later in the hs_err file. 1026 // flags are from setting file 1027 if (num_jvm_flags() > 0) { 1028 st->print_raw("Settings File: "); 1029 print_jvm_flags_on(st); 1030 st->cr(); 1031 } 1032 // args are the command line and environment variable arguments. 1033 st->print_raw("Command Line: "); 1034 if (num_jvm_args() > 0) { 1035 print_jvm_args_on(st); 1036 } 1037 // this is the classfile and any arguments to the java program 1038 if (java_command() != NULL) { 1039 st->print("%s", java_command()); 1040 } 1041 st->cr(); 1042 } 1043 1044 void Arguments::print_jvm_flags_on(outputStream* st) { 1045 if (_num_jvm_flags > 0) { 1046 for (int i=0; i < _num_jvm_flags; i++) { 1047 st->print("%s ", _jvm_flags_array[i]); 1048 } 1049 } 1050 } 1051 1052 void Arguments::print_jvm_args_on(outputStream* st) { 1053 if (_num_jvm_args > 0) { 1054 for (int i=0; i < _num_jvm_args; i++) { 1055 st->print("%s ", _jvm_args_array[i]); 1056 } 1057 } 1058 } 1059 1060 bool Arguments::process_argument(const char* arg, 1061 jboolean ignore_unrecognized, 1062 Flag::Flags origin) { 1063 JDK_Version since = JDK_Version(); 1064 1065 if (parse_argument(arg, origin)) { 1066 return true; 1067 } 1068 1069 // Determine if the flag has '+', '-', or '=' characters. 1070 bool has_plus_minus = (*arg == '+' || *arg == '-'); 1071 const char* const argname = has_plus_minus ? arg + 1 : arg; 1072 1073 size_t arg_len; 1074 const char* equal_sign = strchr(argname, '='); 1075 if (equal_sign == NULL) { 1076 arg_len = strlen(argname); 1077 } else { 1078 arg_len = equal_sign - argname; 1079 } 1080 1081 // Only make the obsolete check for valid arguments. 1082 if (arg_len <= BUFLEN) { 1083 // Construct a string which consists only of the argument name without '+', '-', or '='. 1084 char stripped_argname[BUFLEN+1]; // +1 for '\0' 1085 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0' 1086 if (is_obsolete_flag(stripped_argname, &since)) { 1087 char version[256]; 1088 since.to_string(version, sizeof(version)); 1089 warning("Ignoring option %s; support was removed in %s", stripped_argname, version); 1090 return true; 1091 } 1092 #ifndef PRODUCT 1093 else { 1094 const char* replacement; 1095 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){ 1096 log_warning(arguments)("%s has been removed. Please use %s instead.", 1097 stripped_argname, 1098 replacement); 1099 return false; 1100 } 1101 } 1102 #endif //PRODUCT 1103 } 1104 1105 // For locked flags, report a custom error message if available. 1106 // Otherwise, report the standard unrecognized VM option. 1107 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true); 1108 if (found_flag != NULL) { 1109 char locked_message_buf[BUFLEN]; 1110 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN); 1111 if (strlen(locked_message_buf) == 0) { 1112 if (found_flag->is_bool() && !has_plus_minus) { 1113 jio_fprintf(defaultStream::error_stream(), 1114 "Missing +/- setting for VM option '%s'\n", argname); 1115 } else if (!found_flag->is_bool() && has_plus_minus) { 1116 jio_fprintf(defaultStream::error_stream(), 1117 "Unexpected +/- setting in VM option '%s'\n", argname); 1118 } else { 1119 jio_fprintf(defaultStream::error_stream(), 1120 "Improperly specified VM option '%s'\n", argname); 1121 } 1122 } else { 1123 #ifdef PRODUCT 1124 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) || 1125 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD)); 1126 if (ignore_unrecognized && mismatched) { 1127 return true; 1128 } 1129 #endif 1130 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 1131 } 1132 } else { 1133 if (ignore_unrecognized) { 1134 return true; 1135 } 1136 jio_fprintf(defaultStream::error_stream(), 1137 "Unrecognized VM option '%s'\n", argname); 1138 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true); 1139 if (fuzzy_matched != NULL) { 1140 jio_fprintf(defaultStream::error_stream(), 1141 "Did you mean '%s%s%s'? ", 1142 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 1143 fuzzy_matched->_name, 1144 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 1145 } 1146 } 1147 1148 // allow for commandline "commenting out" options like -XX:#+Verbose 1149 return arg[0] == '#'; 1150 } 1151 1152 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 1153 FILE* stream = fopen(file_name, "rb"); 1154 if (stream == NULL) { 1155 if (should_exist) { 1156 jio_fprintf(defaultStream::error_stream(), 1157 "Could not open settings file %s\n", file_name); 1158 return false; 1159 } else { 1160 return true; 1161 } 1162 } 1163 1164 char token[1024]; 1165 int pos = 0; 1166 1167 bool in_white_space = true; 1168 bool in_comment = false; 1169 bool in_quote = false; 1170 char quote_c = 0; 1171 bool result = true; 1172 1173 int c = getc(stream); 1174 while(c != EOF && pos < (int)(sizeof(token)-1)) { 1175 if (in_white_space) { 1176 if (in_comment) { 1177 if (c == '\n') in_comment = false; 1178 } else { 1179 if (c == '#') in_comment = true; 1180 else if (!isspace(c)) { 1181 in_white_space = false; 1182 token[pos++] = c; 1183 } 1184 } 1185 } else { 1186 if (c == '\n' || (!in_quote && isspace(c))) { 1187 // token ends at newline, or at unquoted whitespace 1188 // this allows a way to include spaces in string-valued options 1189 token[pos] = '\0'; 1190 logOption(token); 1191 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1192 build_jvm_flags(token); 1193 pos = 0; 1194 in_white_space = true; 1195 in_quote = false; 1196 } else if (!in_quote && (c == '\'' || c == '"')) { 1197 in_quote = true; 1198 quote_c = c; 1199 } else if (in_quote && (c == quote_c)) { 1200 in_quote = false; 1201 } else { 1202 token[pos++] = c; 1203 } 1204 } 1205 c = getc(stream); 1206 } 1207 if (pos > 0) { 1208 token[pos] = '\0'; 1209 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1210 build_jvm_flags(token); 1211 } 1212 fclose(stream); 1213 return result; 1214 } 1215 1216 //============================================================================================================= 1217 // Parsing of properties (-D) 1218 1219 const char* Arguments::get_property(const char* key) { 1220 return PropertyList_get_value(system_properties(), key); 1221 } 1222 1223 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) { 1224 const char* eq = strchr(prop, '='); 1225 const char* key; 1226 const char* value = ""; 1227 1228 if (eq == NULL) { 1229 // property doesn't have a value, thus use passed string 1230 key = prop; 1231 } else { 1232 // property have a value, thus extract it and save to the 1233 // allocated string 1234 size_t key_len = eq - prop; 1235 char* tmp_key = AllocateHeap(key_len + 1, mtArguments); 1236 1237 jio_snprintf(tmp_key, key_len + 1, "%s", prop); 1238 key = tmp_key; 1239 1240 value = &prop[key_len + 1]; 1241 } 1242 1243 if (strcmp(key, "java.compiler") == 0) { 1244 process_java_compiler_argument(value); 1245 // Record value in Arguments, but let it get passed to Java. 1246 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 1247 strcmp(key, "sun.java.launcher.pid") == 0) { 1248 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1249 // private and are processed in process_sun_java_launcher_properties(); 1250 // the sun.java.launcher property is passed on to the java application 1251 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1252 // append is true, writable is true, internal is false 1253 PropertyList_unique_add(&_system_properties, key, value, AppendProperty, 1254 WriteableProperty, ExternalProperty); 1255 } else { 1256 if (strcmp(key, "sun.java.command") == 0) { 1257 char *old_java_command = _java_command; 1258 _java_command = os::strdup_check_oom(value, mtArguments); 1259 if (old_java_command != NULL) { 1260 os::free(old_java_command); 1261 } 1262 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1263 const char* old_java_vendor_url_bug = _java_vendor_url_bug; 1264 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1265 // its value without going through the property list or making a Java call. 1266 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments); 1267 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) { 1268 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL"); 1269 os::free((void *)old_java_vendor_url_bug); 1270 } 1271 } 1272 1273 // Create new property and add at the end of the list 1274 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal); 1275 } 1276 1277 if (key != prop) { 1278 // SystemProperty copy passed value, thus free previously allocated 1279 // memory 1280 FreeHeap((void *)key); 1281 } 1282 1283 return true; 1284 } 1285 1286 #if INCLUDE_CDS 1287 void Arguments::check_unsupported_dumping_properties() { 1288 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump"); 1289 const char* unsupported_properties[] = { "jdk.module.main", 1290 "jdk.module.limitmods", 1291 "jdk.module.path", 1292 "jdk.module.upgrade.path", 1293 "jdk.module.patch.0" }; 1294 const char* unsupported_options[] = { "-m", // cannot use at dump time 1295 "--limit-modules", // ignored at dump time 1296 "--module-path", // ignored at dump time 1297 "--upgrade-module-path", // ignored at dump time 1298 "--patch-module" // ignored at dump time 1299 }; 1300 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be"); 1301 // If a vm option is found in the unsupported_options array with index less than the info_idx, 1302 // vm will exit with an error message. Otherwise, it will print an informational message if 1303 // -Xlog:cds is enabled. 1304 uint info_idx = 1; 1305 SystemProperty* sp = system_properties(); 1306 while (sp != NULL) { 1307 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) { 1308 if (strcmp(sp->key(), unsupported_properties[i]) == 0) { 1309 if (i < info_idx) { 1310 vm_exit_during_initialization( 1311 "Cannot use the following option when dumping the shared archive", unsupported_options[i]); 1312 } else { 1313 log_info(cds)("Info: the %s option is ignored when dumping the shared archive", 1314 unsupported_options[i]); 1315 } 1316 } 1317 } 1318 sp = sp->next(); 1319 } 1320 1321 // Check for an exploded module build in use with -Xshare:dump. 1322 if (!has_jimage()) { 1323 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build"); 1324 } 1325 } 1326 #endif 1327 1328 //=========================================================================================================== 1329 // Setting int/mixed/comp mode flags 1330 1331 void Arguments::set_mode_flags(Mode mode) { 1332 // Set up default values for all flags. 1333 // If you add a flag to any of the branches below, 1334 // add a default value for it here. 1335 set_java_compiler(false); 1336 _mode = mode; 1337 1338 // Ensure Agent_OnLoad has the correct initial values. 1339 // This may not be the final mode; mode may change later in onload phase. 1340 PropertyList_unique_add(&_system_properties, "java.vm.info", 1341 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty); 1342 1343 UseInterpreter = true; 1344 UseCompiler = true; 1345 UseLoopCounter = true; 1346 1347 // Default values may be platform/compiler dependent - 1348 // use the saved values 1349 ClipInlining = Arguments::_ClipInlining; 1350 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1351 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1352 BackgroundCompilation = Arguments::_BackgroundCompilation; 1353 if (TieredCompilation) { 1354 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) { 1355 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog; 1356 } 1357 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) { 1358 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold; 1359 } 1360 } 1361 1362 // Change from defaults based on mode 1363 switch (mode) { 1364 default: 1365 ShouldNotReachHere(); 1366 break; 1367 case _int: 1368 UseCompiler = false; 1369 UseLoopCounter = false; 1370 AlwaysCompileLoopMethods = false; 1371 UseOnStackReplacement = false; 1372 break; 1373 case _mixed: 1374 // same as default 1375 break; 1376 case _comp: 1377 UseInterpreter = false; 1378 BackgroundCompilation = false; 1379 ClipInlining = false; 1380 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1381 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1382 // compile a level 4 (C2) and then continue executing it. 1383 if (TieredCompilation) { 1384 Tier3InvokeNotifyFreqLog = 0; 1385 Tier4InvocationThreshold = 0; 1386 } 1387 break; 1388 } 1389 } 1390 1391 // Conflict: required to use shared spaces (-Xshare:on), but 1392 // incompatible command line options were chosen. 1393 static void no_shared_spaces(const char* message) { 1394 if (RequireSharedSpaces) { 1395 jio_fprintf(defaultStream::error_stream(), 1396 "Class data sharing is inconsistent with other specified options.\n"); 1397 vm_exit_during_initialization("Unable to use shared archive.", message); 1398 } else { 1399 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1400 } 1401 } 1402 1403 // Returns threshold scaled with the value of scale. 1404 // If scale < 0.0, threshold is returned without scaling. 1405 intx Arguments::scaled_compile_threshold(intx threshold, double scale) { 1406 if (scale == 1.0 || scale < 0.0) { 1407 return threshold; 1408 } else { 1409 return (intx)(threshold * scale); 1410 } 1411 } 1412 1413 // Returns freq_log scaled with the value of scale. 1414 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1]. 1415 // If scale < 0.0, freq_log is returned without scaling. 1416 intx Arguments::scaled_freq_log(intx freq_log, double scale) { 1417 // Check if scaling is necessary or if negative value was specified. 1418 if (scale == 1.0 || scale < 0.0) { 1419 return freq_log; 1420 } 1421 // Check values to avoid calculating log2 of 0. 1422 if (scale == 0.0 || freq_log == 0) { 1423 return 0; 1424 } 1425 // Determine the maximum notification frequency value currently supported. 1426 // The largest mask value that the interpreter/C1 can handle is 1427 // of length InvocationCounter::number_of_count_bits. Mask values are always 1428 // one bit shorter then the value of the notification frequency. Set 1429 // max_freq_bits accordingly. 1430 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1; 1431 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale); 1432 if (scaled_freq == 0) { 1433 // Return 0 right away to avoid calculating log2 of 0. 1434 return 0; 1435 } else if (scaled_freq > nth_bit(max_freq_bits)) { 1436 return max_freq_bits; 1437 } else { 1438 return log2_intptr(scaled_freq); 1439 } 1440 } 1441 1442 void Arguments::set_tiered_flags() { 1443 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. 1444 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { 1445 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); 1446 } 1447 if (CompilationPolicyChoice < 2) { 1448 vm_exit_during_initialization( 1449 "Incompatible compilation policy selected", NULL); 1450 } 1451 // Increase the code cache size - tiered compiles a lot more. 1452 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1453 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize, 1454 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5)); 1455 } 1456 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M 1457 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { 1458 FLAG_SET_ERGO(bool, SegmentedCodeCache, true); 1459 } 1460 if (!UseInterpreter) { // -Xcomp 1461 Tier3InvokeNotifyFreqLog = 0; 1462 Tier4InvocationThreshold = 0; 1463 } 1464 1465 if (CompileThresholdScaling < 0) { 1466 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL); 1467 } 1468 1469 // Scale tiered compilation thresholds. 1470 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged. 1471 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 1472 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog)); 1473 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog)); 1474 1475 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold)); 1476 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold)); 1477 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold)); 1478 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold)); 1479 1480 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here 1481 // once these thresholds become supported. 1482 1483 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog)); 1484 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog)); 1485 1486 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog)); 1487 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog)); 1488 1489 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog)); 1490 1491 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold)); 1492 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold)); 1493 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold)); 1494 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold)); 1495 } 1496 } 1497 1498 void set_object_alignment() { 1499 // Object alignment. 1500 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1501 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1502 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1503 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1504 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1505 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1506 1507 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1508 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1509 1510 // Oop encoding heap max 1511 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1512 1513 if (SurvivorAlignmentInBytes == 0) { 1514 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1515 } 1516 } 1517 1518 size_t Arguments::max_heap_for_compressed_oops() { 1519 // Avoid sign flip. 1520 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1521 // We need to fit both the NULL page and the heap into the memory budget, while 1522 // keeping alignment constraints of the heap. To guarantee the latter, as the 1523 // NULL page is located before the heap, we pad the NULL page to the conservative 1524 // maximum alignment that the GC may ever impose upon the heap. 1525 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(), 1526 _conservative_max_heap_alignment); 1527 1528 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1529 NOT_LP64(ShouldNotReachHere(); return 0); 1530 } 1531 1532 void Arguments::set_use_compressed_oops() { 1533 #ifndef ZERO 1534 #ifdef _LP64 1535 // MaxHeapSize is not set up properly at this point, but 1536 // the only value that can override MaxHeapSize if we are 1537 // to use UseCompressedOops is InitialHeapSize. 1538 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1539 1540 if (max_heap_size <= max_heap_for_compressed_oops()) { 1541 #if !defined(COMPILER1) || defined(TIERED) 1542 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1543 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1544 } 1545 #endif 1546 } else { 1547 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1548 warning("Max heap size too large for Compressed Oops"); 1549 FLAG_SET_DEFAULT(UseCompressedOops, false); 1550 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1551 } 1552 } 1553 #endif // _LP64 1554 #endif // ZERO 1555 } 1556 1557 1558 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1559 // set_use_compressed_oops(). 1560 void Arguments::set_use_compressed_klass_ptrs() { 1561 #ifndef ZERO 1562 #ifdef _LP64 1563 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1564 if (!UseCompressedOops) { 1565 if (UseCompressedClassPointers) { 1566 warning("UseCompressedClassPointers requires UseCompressedOops"); 1567 } 1568 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1569 } else { 1570 // Turn on UseCompressedClassPointers too 1571 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1572 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1573 } 1574 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1575 if (UseCompressedClassPointers) { 1576 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1577 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1578 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1579 } 1580 } 1581 } 1582 #endif // _LP64 1583 #endif // !ZERO 1584 } 1585 1586 void Arguments::set_conservative_max_heap_alignment() { 1587 // The conservative maximum required alignment for the heap is the maximum of 1588 // the alignments imposed by several sources: any requirements from the heap 1589 // itself, the collector policy and the maximum page size we may run the VM 1590 // with. 1591 size_t heap_alignment = GCFactory::gc()->conservative_max_heap_alignment(); 1592 _conservative_max_heap_alignment = MAX4(heap_alignment, 1593 (size_t)os::vm_allocation_granularity(), 1594 os::max_page_size(), 1595 CollectorPolicy::compute_heap_alignment()); 1596 } 1597 1598 #ifdef TIERED 1599 bool Arguments::compilation_mode_selected() { 1600 return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) || 1601 !FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler)); 1602 1603 } 1604 1605 void Arguments::select_compilation_mode_ergonomically() { 1606 #if defined(_WINDOWS) && !defined(_LP64) 1607 if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) { 1608 FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true); 1609 } 1610 #endif 1611 if (NeverActAsServerClassMachine) { 1612 set_client_compilation_mode(); 1613 } 1614 } 1615 #endif //TIERED 1616 1617 #if INCLUDE_JVMCI 1618 void Arguments::set_jvmci_specific_flags() { 1619 if (UseJVMCICompiler) { 1620 if (FLAG_IS_DEFAULT(TypeProfileWidth)) { 1621 FLAG_SET_DEFAULT(TypeProfileWidth, 8); 1622 } 1623 if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) { 1624 FLAG_SET_DEFAULT(OnStackReplacePercentage, 933); 1625 } 1626 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1627 FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M); 1628 } 1629 if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) { 1630 FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M); 1631 } 1632 if (FLAG_IS_DEFAULT(MetaspaceSize)) { 1633 FLAG_SET_DEFAULT(MetaspaceSize, 12*M); 1634 } 1635 if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) { 1636 FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K); 1637 } 1638 if (TieredStopAtLevel != CompLevel_full_optimization) { 1639 // Currently JVMCI compiler can only work at the full optimization level 1640 warning("forcing TieredStopAtLevel to full optimization because JVMCI is enabled"); 1641 TieredStopAtLevel = CompLevel_full_optimization; 1642 } 1643 if (FLAG_IS_DEFAULT(TypeProfileLevel)) { 1644 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 1645 } 1646 } 1647 } 1648 #endif 1649 1650 jint Arguments::set_ergonomics_flags() { 1651 #ifdef TIERED 1652 if (!compilation_mode_selected()) { 1653 select_compilation_mode_ergonomically(); 1654 } 1655 #endif 1656 1657 jint gc_result = GCFactory::initialize(); 1658 if (gc_result != JNI_OK) { 1659 return gc_result; 1660 } 1661 1662 #if defined(COMPILER2) || INCLUDE_JVMCI 1663 // Shared spaces work fine with other GCs but causes bytecode rewriting 1664 // to be disabled, which hurts interpreter performance and decreases 1665 // server performance. When -server is specified, keep the default off 1666 // unless it is asked for. Future work: either add bytecode rewriting 1667 // at link time, or rewrite bytecodes in non-shared methods. 1668 if (is_server_compilation_mode_vm() && !DumpSharedSpaces && !RequireSharedSpaces && 1669 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { 1670 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); 1671 } 1672 #endif 1673 1674 set_conservative_max_heap_alignment(); 1675 1676 #ifndef ZERO 1677 #ifdef _LP64 1678 set_use_compressed_oops(); 1679 1680 // set_use_compressed_klass_ptrs() must be called after calling 1681 // set_use_compressed_oops(). 1682 set_use_compressed_klass_ptrs(); 1683 1684 // Also checks that certain machines are slower with compressed oops 1685 // in vm_version initialization code. 1686 #endif // _LP64 1687 #endif // !ZERO 1688 1689 return JNI_OK; 1690 } 1691 1692 void Arguments::set_gc_specific_flags() { 1693 // Set per-collector flags 1694 GCFactory::gc()->initialize_flags(); 1695 // Set flags for all collectors. 1696 GCFactory::initialize_flags_global(); 1697 } 1698 1699 julong Arguments::limit_by_allocatable_memory(julong limit) { 1700 julong max_allocatable; 1701 julong result = limit; 1702 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1703 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1704 } 1705 return result; 1706 } 1707 1708 // Use static initialization to get the default before parsing 1709 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1710 1711 void Arguments::set_heap_size() { 1712 julong phys_mem = 1713 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1714 : (julong)MaxRAM; 1715 1716 // Experimental support for CGroup memory limits 1717 if (UseCGroupMemoryLimitForHeap) { 1718 // This is a rough indicator that a CGroup limit may be in force 1719 // for this process 1720 const char* lim_file = "/sys/fs/cgroup/memory/memory.limit_in_bytes"; 1721 FILE *fp = fopen(lim_file, "r"); 1722 if (fp != NULL) { 1723 julong cgroup_max = 0; 1724 int ret = fscanf(fp, JULONG_FORMAT, &cgroup_max); 1725 if (ret == 1 && cgroup_max > 0) { 1726 // If unlimited, cgroup_max will be a very large, but unspecified 1727 // value, so use initial phys_mem as a limit 1728 log_info(gc, heap)("Setting phys_mem to the min of cgroup limit (" 1729 JULONG_FORMAT "MB) and initial phys_mem (" 1730 JULONG_FORMAT "MB)", cgroup_max/M, phys_mem/M); 1731 phys_mem = MIN2(cgroup_max, phys_mem); 1732 } else { 1733 warning("Unable to read/parse cgroup memory limit from %s: %s", 1734 lim_file, errno != 0 ? strerror(errno) : "unknown error"); 1735 } 1736 fclose(fp); 1737 } else { 1738 warning("Unable to open cgroup memory limit file %s (%s)", lim_file, strerror(errno)); 1739 } 1740 } 1741 1742 // Convert deprecated flags 1743 if (FLAG_IS_DEFAULT(MaxRAMPercentage) && 1744 !FLAG_IS_DEFAULT(MaxRAMFraction)) 1745 MaxRAMPercentage = 100.0 / MaxRAMFraction; 1746 1747 if (FLAG_IS_DEFAULT(MinRAMPercentage) && 1748 !FLAG_IS_DEFAULT(MinRAMFraction)) 1749 MinRAMPercentage = 100.0 / MinRAMFraction; 1750 1751 if (FLAG_IS_DEFAULT(InitialRAMPercentage) && 1752 !FLAG_IS_DEFAULT(InitialRAMFraction)) 1753 InitialRAMPercentage = 100.0 / InitialRAMFraction; 1754 1755 // If the maximum heap size has not been set with -Xmx, 1756 // then set it as fraction of the size of physical memory, 1757 // respecting the maximum and minimum sizes of the heap. 1758 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1759 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100); 1760 if (phys_mem <= (julong)((MaxHeapSize * MinRAMPercentage) / 100)) { 1761 // Small physical memory, so use a minimum fraction of it for the heap 1762 reasonable_max = (julong)((phys_mem * MinRAMPercentage) / 100); 1763 } else { 1764 // Not-small physical memory, so require a heap at least 1765 // as large as MaxHeapSize 1766 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 1767 } 1768 1769 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 1770 // Limit the heap size to ErgoHeapSizeLimit 1771 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 1772 } 1773 if (UseCompressedOops) { 1774 // Limit the heap size to the maximum possible when using compressed oops 1775 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 1776 1777 // HeapBaseMinAddress can be greater than default but not less than. 1778 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 1779 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 1780 // matches compressed oops printing flags 1781 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT 1782 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT, 1783 DefaultHeapBaseMinAddress, 1784 DefaultHeapBaseMinAddress/G, 1785 HeapBaseMinAddress); 1786 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 1787 } 1788 } 1789 1790 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 1791 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 1792 // but it should be not less than default MaxHeapSize. 1793 max_coop_heap -= HeapBaseMinAddress; 1794 } 1795 reasonable_max = MIN2(reasonable_max, max_coop_heap); 1796 } 1797 reasonable_max = limit_by_allocatable_memory(reasonable_max); 1798 1799 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 1800 // An initial heap size was specified on the command line, 1801 // so be sure that the maximum size is consistent. Done 1802 // after call to limit_by_allocatable_memory because that 1803 // method might reduce the allocation size. 1804 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 1805 } 1806 1807 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 1808 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max); 1809 } 1810 1811 // If the minimum or initial heap_size have not been set or requested to be set 1812 // ergonomically, set them accordingly. 1813 if (InitialHeapSize == 0 || min_heap_size() == 0) { 1814 julong reasonable_minimum = (julong)(OldSize + NewSize); 1815 1816 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 1817 1818 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 1819 1820 if (InitialHeapSize == 0) { 1821 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100); 1822 1823 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 1824 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 1825 1826 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 1827 1828 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial); 1829 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial); 1830 } 1831 // If the minimum heap size has not been set (via -Xms), 1832 // synchronize with InitialHeapSize to avoid errors with the default value. 1833 if (min_heap_size() == 0) { 1834 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize)); 1835 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 1836 } 1837 } 1838 } 1839 1840 // This option inspects the machine and attempts to set various 1841 // parameters to be optimal for long-running, memory allocation 1842 // intensive jobs. It is intended for machines with large 1843 // amounts of cpu and memory. 1844 jint Arguments::set_aggressive_heap_flags() { 1845 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 1846 // VM, but we may not be able to represent the total physical memory 1847 // available (like having 8gb of memory on a box but using a 32bit VM). 1848 // Thus, we need to make sure we're using a julong for intermediate 1849 // calculations. 1850 julong initHeapSize; 1851 julong total_memory = os::physical_memory(); 1852 1853 if (total_memory < (julong) 256 * M) { 1854 jio_fprintf(defaultStream::error_stream(), 1855 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 1856 vm_exit(1); 1857 } 1858 1859 // The heap size is half of available memory, or (at most) 1860 // all of possible memory less 160mb (leaving room for the OS 1861 // when using ISM). This is the maximum; because adaptive sizing 1862 // is turned on below, the actual space used may be smaller. 1863 1864 initHeapSize = MIN2(total_memory / (julong) 2, 1865 total_memory - (julong) 160 * M); 1866 1867 initHeapSize = limit_by_allocatable_memory(initHeapSize); 1868 1869 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1870 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) { 1871 return JNI_EINVAL; 1872 } 1873 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) { 1874 return JNI_EINVAL; 1875 } 1876 // Currently the minimum size and the initial heap sizes are the same. 1877 set_min_heap_size(initHeapSize); 1878 } 1879 if (FLAG_IS_DEFAULT(NewSize)) { 1880 // Make the young generation 3/8ths of the total heap. 1881 if (FLAG_SET_CMDLINE(size_t, NewSize, 1882 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) { 1883 return JNI_EINVAL; 1884 } 1885 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) { 1886 return JNI_EINVAL; 1887 } 1888 } 1889 1890 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 1891 FLAG_SET_DEFAULT(UseLargePages, true); 1892 #endif 1893 1894 // Increase some data structure sizes for efficiency 1895 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) { 1896 return JNI_EINVAL; 1897 } 1898 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) { 1899 return JNI_EINVAL; 1900 } 1901 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) { 1902 return JNI_EINVAL; 1903 } 1904 1905 // See the OldPLABSize comment below, but replace 'after promotion' 1906 // with 'after copying'. YoungPLABSize is the size of the survivor 1907 // space per-gc-thread buffers. The default is 4kw. 1908 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words 1909 return JNI_EINVAL; 1910 } 1911 1912 // OldPLABSize is the size of the buffers in the old gen that 1913 // UseParallelGC uses to promote live data that doesn't fit in the 1914 // survivor spaces. At any given time, there's one for each gc thread. 1915 // The default size is 1kw. These buffers are rarely used, since the 1916 // survivor spaces are usually big enough. For specjbb, however, there 1917 // are occasions when there's lots of live data in the young gen 1918 // and we end up promoting some of it. We don't have a definite 1919 // explanation for why bumping OldPLABSize helps, but the theory 1920 // is that a bigger PLAB results in retaining something like the 1921 // original allocation order after promotion, which improves mutator 1922 // locality. A minor effect may be that larger PLABs reduce the 1923 // number of PLAB allocation events during gc. The value of 8kw 1924 // was arrived at by experimenting with specjbb. 1925 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words 1926 return JNI_EINVAL; 1927 } 1928 1929 // Enable parallel GC and adaptive generation sizing 1930 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) { 1931 return JNI_EINVAL; 1932 } 1933 1934 // Encourage steady state memory management 1935 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) { 1936 return JNI_EINVAL; 1937 } 1938 1939 // This appears to improve mutator locality 1940 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 1941 return JNI_EINVAL; 1942 } 1943 1944 // Get around early Solaris scheduling bug 1945 // (affinity vs other jobs on system) 1946 // but disallow DR and offlining (5008695). 1947 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) { 1948 return JNI_EINVAL; 1949 } 1950 1951 return JNI_OK; 1952 } 1953 1954 // This must be called after ergonomics. 1955 void Arguments::set_bytecode_flags() { 1956 if (!RewriteBytecodes) { 1957 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1958 } 1959 } 1960 1961 // Aggressive optimization flags -XX:+AggressiveOpts 1962 jint Arguments::set_aggressive_opts_flags() { 1963 #ifdef COMPILER2 1964 if (AggressiveUnboxing) { 1965 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1966 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1967 } else if (!EliminateAutoBox) { 1968 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 1969 AggressiveUnboxing = false; 1970 } 1971 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1972 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1973 } else if (!DoEscapeAnalysis) { 1974 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 1975 AggressiveUnboxing = false; 1976 } 1977 } 1978 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1979 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1980 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1981 } 1982 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1983 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1984 } 1985 1986 // Feed the cache size setting into the JDK 1987 char buffer[1024]; 1988 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 1989 if (!add_property(buffer)) { 1990 return JNI_ENOMEM; 1991 } 1992 } 1993 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 1994 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 1995 } 1996 #endif 1997 1998 if (AggressiveOpts) { 1999 // Sample flag setting code 2000 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 2001 // FLAG_SET_DEFAULT(EliminateZeroing, true); 2002 // } 2003 } 2004 2005 return JNI_OK; 2006 } 2007 2008 //=========================================================================================================== 2009 // Parsing of java.compiler property 2010 2011 void Arguments::process_java_compiler_argument(const char* arg) { 2012 // For backwards compatibility, Djava.compiler=NONE or "" 2013 // causes us to switch to -Xint mode UNLESS -Xdebug 2014 // is also specified. 2015 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 2016 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 2017 } 2018 } 2019 2020 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2021 _sun_java_launcher = os::strdup_check_oom(launcher); 2022 } 2023 2024 bool Arguments::created_by_java_launcher() { 2025 assert(_sun_java_launcher != NULL, "property must have value"); 2026 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2027 } 2028 2029 bool Arguments::sun_java_launcher_is_altjvm() { 2030 return _sun_java_launcher_is_altjvm; 2031 } 2032 2033 //=========================================================================================================== 2034 // Parsing of main arguments 2035 2036 #if INCLUDE_JVMCI 2037 // Check consistency of jvmci vm argument settings. 2038 bool Arguments::check_jvmci_args_consistency() { 2039 return JVMCIGlobals::check_jvmci_flags_are_consistent(); 2040 } 2041 #endif //INCLUDE_JVMCI 2042 2043 // Check consistency of GC selection 2044 bool Arguments::check_gc_consistency() { 2045 // Ensure that the user has not selected conflicting sets 2046 // of collectors. 2047 uint i = 0; 2048 if (UseSerialGC) i++; 2049 if (UseConcMarkSweepGC) i++; 2050 if (UseParallelGC || UseParallelOldGC) i++; 2051 if (UseG1GC) i++; 2052 if (i > 1) { 2053 jio_fprintf(defaultStream::error_stream(), 2054 "Conflicting collector combinations in option list; " 2055 "please refer to the release notes for the combinations " 2056 "allowed\n"); 2057 return false; 2058 } 2059 2060 return true; 2061 } 2062 2063 // Check the consistency of vm_init_args 2064 bool Arguments::check_vm_args_consistency() { 2065 // Method for adding checks for flag consistency. 2066 // The intent is to warn the user of all possible conflicts, 2067 // before returning an error. 2068 // Note: Needs platform-dependent factoring. 2069 bool status = true; 2070 2071 if (TLABRefillWasteFraction == 0) { 2072 jio_fprintf(defaultStream::error_stream(), 2073 "TLABRefillWasteFraction should be a denominator, " 2074 "not " SIZE_FORMAT "\n", 2075 TLABRefillWasteFraction); 2076 status = false; 2077 } 2078 2079 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 2080 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 2081 } 2082 2083 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) { 2084 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false); 2085 } 2086 2087 if (GCTimeLimit == 100) { 2088 // Turn off gc-overhead-limit-exceeded checks 2089 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 2090 } 2091 2092 status = status && check_gc_consistency(); 2093 2094 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 2095 // insists that we hold the requisite locks so that the iteration is 2096 // MT-safe. For the verification at start-up and shut-down, we don't 2097 // yet have a good way of acquiring and releasing these locks, 2098 // which are not visible at the CollectedHeap level. We want to 2099 // be able to acquire these locks and then do the iteration rather 2100 // than just disable the lock verification. This will be fixed under 2101 // bug 4788986. 2102 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 2103 if (VerifyDuringStartup) { 2104 warning("Heap verification at start-up disabled " 2105 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2106 VerifyDuringStartup = false; // Disable verification at start-up 2107 } 2108 2109 if (VerifyBeforeExit) { 2110 warning("Heap verification at shutdown disabled " 2111 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2112 VerifyBeforeExit = false; // Disable verification at shutdown 2113 } 2114 } 2115 2116 if (PrintNMTStatistics) { 2117 #if INCLUDE_NMT 2118 if (MemTracker::tracking_level() == NMT_off) { 2119 #endif // INCLUDE_NMT 2120 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2121 PrintNMTStatistics = false; 2122 #if INCLUDE_NMT 2123 } 2124 #endif 2125 } 2126 2127 #if INCLUDE_JVMCI 2128 status = status && check_jvmci_args_consistency(); 2129 2130 if (EnableJVMCI) { 2131 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true", 2132 AddProperty, UnwriteableProperty, InternalProperty); 2133 2134 if (!ScavengeRootsInCode) { 2135 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled"); 2136 ScavengeRootsInCode = 1; 2137 } 2138 } 2139 #endif 2140 2141 // Check lower bounds of the code cache 2142 // Template Interpreter code is approximately 3X larger in debug builds. 2143 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); 2144 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) { 2145 jio_fprintf(defaultStream::error_stream(), 2146 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K, 2147 os::vm_page_size()/K); 2148 status = false; 2149 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) { 2150 jio_fprintf(defaultStream::error_stream(), 2151 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", 2152 ReservedCodeCacheSize/K, InitialCodeCacheSize/K); 2153 status = false; 2154 } else if (ReservedCodeCacheSize < min_code_cache_size) { 2155 jio_fprintf(defaultStream::error_stream(), 2156 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, 2157 min_code_cache_size/K); 2158 status = false; 2159 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) { 2160 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported. 2161 jio_fprintf(defaultStream::error_stream(), 2162 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, 2163 CODE_CACHE_SIZE_LIMIT/M); 2164 status = false; 2165 } else if (NonNMethodCodeHeapSize < min_code_cache_size) { 2166 jio_fprintf(defaultStream::error_stream(), 2167 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, 2168 min_code_cache_size/K); 2169 status = false; 2170 } 2171 2172 #ifdef _LP64 2173 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { 2174 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); 2175 } 2176 #endif 2177 2178 #ifndef SUPPORT_RESERVED_STACK_AREA 2179 if (StackReservedPages != 0) { 2180 FLAG_SET_CMDLINE(intx, StackReservedPages, 0); 2181 warning("Reserved Stack Area not supported on this platform"); 2182 } 2183 #endif 2184 2185 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) { 2186 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) { 2187 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options."); 2188 } 2189 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 2190 } 2191 if (UseCompiler && is_interpreter_only()) { 2192 if (!FLAG_IS_DEFAULT(UseCompiler)) { 2193 warning("UseCompiler disabled due to -Xint."); 2194 } 2195 FLAG_SET_CMDLINE(bool, UseCompiler, false); 2196 } 2197 #ifdef COMPILER2 2198 if (PostLoopMultiversioning && !RangeCheckElimination) { 2199 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) { 2200 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled."); 2201 } 2202 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false); 2203 } 2204 #endif 2205 return status; 2206 } 2207 2208 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2209 const char* option_type) { 2210 if (ignore) return false; 2211 2212 const char* spacer = " "; 2213 if (option_type == NULL) { 2214 option_type = ++spacer; // Set both to the empty string. 2215 } 2216 2217 if (os::obsolete_option(option)) { 2218 jio_fprintf(defaultStream::error_stream(), 2219 "Obsolete %s%soption: %s\n", option_type, spacer, 2220 option->optionString); 2221 return false; 2222 } else { 2223 jio_fprintf(defaultStream::error_stream(), 2224 "Unrecognized %s%soption: %s\n", option_type, spacer, 2225 option->optionString); 2226 return true; 2227 } 2228 } 2229 2230 static const char* user_assertion_options[] = { 2231 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2232 }; 2233 2234 static const char* system_assertion_options[] = { 2235 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2236 }; 2237 2238 bool Arguments::parse_uintx(const char* value, 2239 uintx* uintx_arg, 2240 uintx min_size) { 2241 2242 // Check the sign first since atojulong() parses only unsigned values. 2243 bool value_is_positive = !(*value == '-'); 2244 2245 if (value_is_positive) { 2246 julong n; 2247 bool good_return = atojulong(value, &n); 2248 if (good_return) { 2249 bool above_minimum = n >= min_size; 2250 bool value_is_too_large = n > max_uintx; 2251 2252 if (above_minimum && !value_is_too_large) { 2253 *uintx_arg = n; 2254 return true; 2255 } 2256 } 2257 } 2258 return false; 2259 } 2260 2261 unsigned int addreads_count = 0; 2262 unsigned int addexports_count = 0; 2263 unsigned int addopens_count = 0; 2264 unsigned int addmods_count = 0; 2265 unsigned int patch_mod_count = 0; 2266 2267 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) { 2268 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2; 2269 char* property = AllocateHeap(prop_len, mtArguments); 2270 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value); 2271 if (ret < 0 || ret >= (int)prop_len) { 2272 FreeHeap(property); 2273 return false; 2274 } 2275 bool added = add_property(property, UnwriteableProperty, internal); 2276 FreeHeap(property); 2277 return added; 2278 } 2279 2280 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) { 2281 const unsigned int props_count_limit = 1000; 2282 const int max_digits = 3; 2283 const int extra_symbols_count = 3; // includes '.', '=', '\0' 2284 2285 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small. 2286 if (count < props_count_limit) { 2287 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count; 2288 char* property = AllocateHeap(prop_len, mtArguments); 2289 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value); 2290 if (ret < 0 || ret >= (int)prop_len) { 2291 FreeHeap(property); 2292 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value); 2293 return false; 2294 } 2295 bool added = add_property(property, UnwriteableProperty, InternalProperty); 2296 FreeHeap(property); 2297 return added; 2298 } 2299 2300 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit); 2301 return false; 2302 } 2303 2304 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2305 julong* long_arg, 2306 julong min_size, 2307 julong max_size) { 2308 if (!atojulong(s, long_arg)) return arg_unreadable; 2309 return check_memory_size(*long_arg, min_size, max_size); 2310 } 2311 2312 // Parse JavaVMInitArgs structure 2313 2314 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, 2315 const JavaVMInitArgs *java_options_args, 2316 const JavaVMInitArgs *cmd_line_args) { 2317 bool patch_mod_javabase = false; 2318 2319 // Save default settings for some mode flags 2320 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2321 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2322 Arguments::_ClipInlining = ClipInlining; 2323 Arguments::_BackgroundCompilation = BackgroundCompilation; 2324 if (TieredCompilation) { 2325 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; 2326 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; 2327 } 2328 2329 // Setup flags for mixed which is the default 2330 set_mode_flags(_mixed); 2331 2332 // Parse args structure generated from JAVA_TOOL_OPTIONS environment 2333 // variable (if present). 2334 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR); 2335 if (result != JNI_OK) { 2336 return result; 2337 } 2338 2339 // Parse args structure generated from the command line flags. 2340 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, Flag::COMMAND_LINE); 2341 if (result != JNI_OK) { 2342 return result; 2343 } 2344 2345 // Parse args structure generated from the _JAVA_OPTIONS environment 2346 // variable (if present) (mimics classic VM) 2347 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR); 2348 if (result != JNI_OK) { 2349 return result; 2350 } 2351 2352 // Do final processing now that all arguments have been parsed 2353 result = finalize_vm_init_args(patch_mod_javabase); 2354 if (result != JNI_OK) { 2355 return result; 2356 } 2357 2358 return JNI_OK; 2359 } 2360 2361 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2362 // represents a valid JDWP agent. is_path==true denotes that we 2363 // are dealing with -agentpath (case where name is a path), otherwise with 2364 // -agentlib 2365 bool valid_jdwp_agent(char *name, bool is_path) { 2366 char *_name; 2367 const char *_jdwp = "jdwp"; 2368 size_t _len_jdwp, _len_prefix; 2369 2370 if (is_path) { 2371 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2372 return false; 2373 } 2374 2375 _name++; // skip past last path separator 2376 _len_prefix = strlen(JNI_LIB_PREFIX); 2377 2378 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2379 return false; 2380 } 2381 2382 _name += _len_prefix; 2383 _len_jdwp = strlen(_jdwp); 2384 2385 if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2386 _name += _len_jdwp; 2387 } 2388 else { 2389 return false; 2390 } 2391 2392 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2393 return false; 2394 } 2395 2396 return true; 2397 } 2398 2399 if (strcmp(name, _jdwp) == 0) { 2400 return true; 2401 } 2402 2403 return false; 2404 } 2405 2406 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) { 2407 // --patch-module=<module>=<file>(<pathsep><file>)* 2408 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value"); 2409 // Find the equal sign between the module name and the path specification 2410 const char* module_equal = strchr(patch_mod_tail, '='); 2411 if (module_equal == NULL) { 2412 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n"); 2413 return JNI_ERR; 2414 } else { 2415 // Pick out the module name 2416 size_t module_len = module_equal - patch_mod_tail; 2417 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments); 2418 if (module_name != NULL) { 2419 memcpy(module_name, patch_mod_tail, module_len); 2420 *(module_name + module_len) = '\0'; 2421 // The path piece begins one past the module_equal sign 2422 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase); 2423 FREE_C_HEAP_ARRAY(char, module_name); 2424 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) { 2425 return JNI_ENOMEM; 2426 } 2427 } else { 2428 return JNI_ENOMEM; 2429 } 2430 } 2431 return JNI_OK; 2432 } 2433 2434 // Parse -Xss memory string parameter and convert to ThreadStackSize in K. 2435 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) { 2436 // The min and max sizes match the values in globals.hpp, but scaled 2437 // with K. The values have been chosen so that alignment with page 2438 // size doesn't change the max value, which makes the conversions 2439 // back and forth between Xss value and ThreadStackSize value easier. 2440 // The values have also been chosen to fit inside a 32-bit signed type. 2441 const julong min_ThreadStackSize = 0; 2442 const julong max_ThreadStackSize = 1 * M; 2443 2444 const julong min_size = min_ThreadStackSize * K; 2445 const julong max_size = max_ThreadStackSize * K; 2446 2447 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption"); 2448 2449 julong size = 0; 2450 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size); 2451 if (errcode != arg_in_range) { 2452 bool silent = (option == NULL); // Allow testing to silence error messages 2453 if (!silent) { 2454 jio_fprintf(defaultStream::error_stream(), 2455 "Invalid thread stack size: %s\n", option->optionString); 2456 describe_range_error(errcode); 2457 } 2458 return JNI_EINVAL; 2459 } 2460 2461 // Internally track ThreadStackSize in units of 1024 bytes. 2462 const julong size_aligned = align_up(size, K); 2463 assert(size <= size_aligned, 2464 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT, 2465 size, size_aligned); 2466 2467 const julong size_in_K = size_aligned / K; 2468 assert(size_in_K < (julong)max_intx, 2469 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT, 2470 size_in_K); 2471 2472 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow. 2473 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size()); 2474 assert(max_expanded < max_uintx && max_expanded >= size_in_K, 2475 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT, 2476 max_expanded, size_in_K); 2477 2478 *out_ThreadStackSize = (intx)size_in_K; 2479 2480 return JNI_OK; 2481 } 2482 2483 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin) { 2484 // For match_option to return remaining or value part of option string 2485 const char* tail; 2486 2487 // iterate over arguments 2488 for (int index = 0; index < args->nOptions; index++) { 2489 bool is_absolute_path = false; // for -agentpath vs -agentlib 2490 2491 const JavaVMOption* option = args->options + index; 2492 2493 if (!match_option(option, "-Djava.class.path", &tail) && 2494 !match_option(option, "-Dsun.java.command", &tail) && 2495 !match_option(option, "-Dsun.java.launcher", &tail)) { 2496 2497 // add all jvm options to the jvm_args string. This string 2498 // is used later to set the java.vm.args PerfData string constant. 2499 // the -Djava.class.path and the -Dsun.java.command options are 2500 // omitted from jvm_args string as each have their own PerfData 2501 // string constant object. 2502 build_jvm_args(option->optionString); 2503 } 2504 2505 // -verbose:[class/module/gc/jni] 2506 if (match_option(option, "-verbose", &tail)) { 2507 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2508 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load)); 2509 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload)); 2510 } else if (!strcmp(tail, ":module")) { 2511 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load)); 2512 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload)); 2513 } else if (!strcmp(tail, ":gc")) { 2514 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); 2515 } else if (!strcmp(tail, ":jni")) { 2516 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) { 2517 return JNI_EINVAL; 2518 } 2519 } 2520 // -da / -ea / -disableassertions / -enableassertions 2521 // These accept an optional class/package name separated by a colon, e.g., 2522 // -da:java.lang.Thread. 2523 } else if (match_option(option, user_assertion_options, &tail, true)) { 2524 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2525 if (*tail == '\0') { 2526 JavaAssertions::setUserClassDefault(enable); 2527 } else { 2528 assert(*tail == ':', "bogus match by match_option()"); 2529 JavaAssertions::addOption(tail + 1, enable); 2530 } 2531 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2532 } else if (match_option(option, system_assertion_options, &tail, false)) { 2533 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2534 JavaAssertions::setSystemClassDefault(enable); 2535 // -bootclasspath: 2536 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2537 jio_fprintf(defaultStream::output_stream(), 2538 "-Xbootclasspath is no longer a supported option.\n"); 2539 return JNI_EINVAL; 2540 // -bootclasspath/a: 2541 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2542 Arguments::append_sysclasspath(tail); 2543 // -bootclasspath/p: 2544 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2545 jio_fprintf(defaultStream::output_stream(), 2546 "-Xbootclasspath/p is no longer a supported option.\n"); 2547 return JNI_EINVAL; 2548 // -Xrun 2549 } else if (match_option(option, "-Xrun", &tail)) { 2550 if (tail != NULL) { 2551 const char* pos = strchr(tail, ':'); 2552 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2553 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments); 2554 jio_snprintf(name, len + 1, "%s", tail); 2555 2556 char *options = NULL; 2557 if(pos != NULL) { 2558 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2559 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2); 2560 } 2561 #if !INCLUDE_JVMTI 2562 if (strcmp(name, "jdwp") == 0) { 2563 jio_fprintf(defaultStream::error_stream(), 2564 "Debugging agents are not supported in this VM\n"); 2565 return JNI_ERR; 2566 } 2567 #endif // !INCLUDE_JVMTI 2568 add_init_library(name, options); 2569 } 2570 } else if (match_option(option, "--add-reads=", &tail)) { 2571 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) { 2572 return JNI_ENOMEM; 2573 } 2574 } else if (match_option(option, "--add-exports=", &tail)) { 2575 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) { 2576 return JNI_ENOMEM; 2577 } 2578 } else if (match_option(option, "--add-opens=", &tail)) { 2579 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) { 2580 return JNI_ENOMEM; 2581 } 2582 } else if (match_option(option, "--add-modules=", &tail)) { 2583 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) { 2584 return JNI_ENOMEM; 2585 } 2586 } else if (match_option(option, "--limit-modules=", &tail)) { 2587 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) { 2588 return JNI_ENOMEM; 2589 } 2590 } else if (match_option(option, "--module-path=", &tail)) { 2591 if (!create_property("jdk.module.path", tail, ExternalProperty)) { 2592 return JNI_ENOMEM; 2593 } 2594 } else if (match_option(option, "--upgrade-module-path=", &tail)) { 2595 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) { 2596 return JNI_ENOMEM; 2597 } 2598 } else if (match_option(option, "--patch-module=", &tail)) { 2599 // --patch-module=<module>=<file>(<pathsep><file>)* 2600 int res = process_patch_mod_option(tail, patch_mod_javabase); 2601 if (res != JNI_OK) { 2602 return res; 2603 } 2604 } else if (match_option(option, "--illegal-access=", &tail)) { 2605 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) { 2606 return JNI_ENOMEM; 2607 } 2608 // -agentlib and -agentpath 2609 } else if (match_option(option, "-agentlib:", &tail) || 2610 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2611 if(tail != NULL) { 2612 const char* pos = strchr(tail, '='); 2613 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2614 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len); 2615 name[len] = '\0'; 2616 2617 char *options = NULL; 2618 if(pos != NULL) { 2619 options = os::strdup_check_oom(pos + 1, mtArguments); 2620 } 2621 #if !INCLUDE_JVMTI 2622 if (valid_jdwp_agent(name, is_absolute_path)) { 2623 jio_fprintf(defaultStream::error_stream(), 2624 "Debugging agents are not supported in this VM\n"); 2625 return JNI_ERR; 2626 } 2627 #endif // !INCLUDE_JVMTI 2628 add_init_agent(name, options, is_absolute_path); 2629 } 2630 // -javaagent 2631 } else if (match_option(option, "-javaagent:", &tail)) { 2632 #if !INCLUDE_JVMTI 2633 jio_fprintf(defaultStream::error_stream(), 2634 "Instrumentation agents are not supported in this VM\n"); 2635 return JNI_ERR; 2636 #else 2637 if (tail != NULL) { 2638 size_t length = strlen(tail) + 1; 2639 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments); 2640 jio_snprintf(options, length, "%s", tail); 2641 add_init_agent("instrument", options, false); 2642 // java agents need module java.instrument 2643 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) { 2644 return JNI_ENOMEM; 2645 } 2646 } 2647 #endif // !INCLUDE_JVMTI 2648 // -Xnoclassgc 2649 } else if (match_option(option, "-Xnoclassgc")) { 2650 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) { 2651 return JNI_EINVAL; 2652 } 2653 // -Xconcgc 2654 } else if (match_option(option, "-Xconcgc")) { 2655 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) { 2656 return JNI_EINVAL; 2657 } 2658 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC"); 2659 // -Xnoconcgc 2660 } else if (match_option(option, "-Xnoconcgc")) { 2661 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) { 2662 return JNI_EINVAL; 2663 } 2664 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC"); 2665 // -Xbatch 2666 } else if (match_option(option, "-Xbatch")) { 2667 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 2668 return JNI_EINVAL; 2669 } 2670 // -Xmn for compatibility with other JVM vendors 2671 } else if (match_option(option, "-Xmn", &tail)) { 2672 julong long_initial_young_size = 0; 2673 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2674 if (errcode != arg_in_range) { 2675 jio_fprintf(defaultStream::error_stream(), 2676 "Invalid initial young generation size: %s\n", option->optionString); 2677 describe_range_error(errcode); 2678 return JNI_EINVAL; 2679 } 2680 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2681 return JNI_EINVAL; 2682 } 2683 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { 2684 return JNI_EINVAL; 2685 } 2686 // -Xms 2687 } else if (match_option(option, "-Xms", &tail)) { 2688 julong long_initial_heap_size = 0; 2689 // an initial heap size of 0 means automatically determine 2690 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2691 if (errcode != arg_in_range) { 2692 jio_fprintf(defaultStream::error_stream(), 2693 "Invalid initial heap size: %s\n", option->optionString); 2694 describe_range_error(errcode); 2695 return JNI_EINVAL; 2696 } 2697 set_min_heap_size((size_t)long_initial_heap_size); 2698 // Currently the minimum size and the initial heap sizes are the same. 2699 // Can be overridden with -XX:InitialHeapSize. 2700 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) { 2701 return JNI_EINVAL; 2702 } 2703 // -Xmx 2704 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2705 julong long_max_heap_size = 0; 2706 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2707 if (errcode != arg_in_range) { 2708 jio_fprintf(defaultStream::error_stream(), 2709 "Invalid maximum heap size: %s\n", option->optionString); 2710 describe_range_error(errcode); 2711 return JNI_EINVAL; 2712 } 2713 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) { 2714 return JNI_EINVAL; 2715 } 2716 // Xmaxf 2717 } else if (match_option(option, "-Xmaxf", &tail)) { 2718 char* err; 2719 int maxf = (int)(strtod(tail, &err) * 100); 2720 if (*err != '\0' || *tail == '\0') { 2721 jio_fprintf(defaultStream::error_stream(), 2722 "Bad max heap free percentage size: %s\n", 2723 option->optionString); 2724 return JNI_EINVAL; 2725 } else { 2726 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) { 2727 return JNI_EINVAL; 2728 } 2729 } 2730 // Xminf 2731 } else if (match_option(option, "-Xminf", &tail)) { 2732 char* err; 2733 int minf = (int)(strtod(tail, &err) * 100); 2734 if (*err != '\0' || *tail == '\0') { 2735 jio_fprintf(defaultStream::error_stream(), 2736 "Bad min heap free percentage size: %s\n", 2737 option->optionString); 2738 return JNI_EINVAL; 2739 } else { 2740 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) { 2741 return JNI_EINVAL; 2742 } 2743 } 2744 // -Xss 2745 } else if (match_option(option, "-Xss", &tail)) { 2746 intx value = 0; 2747 jint err = parse_xss(option, tail, &value); 2748 if (err != JNI_OK) { 2749 return err; 2750 } 2751 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != Flag::SUCCESS) { 2752 return JNI_EINVAL; 2753 } 2754 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) { 2755 julong long_CodeCacheExpansionSize = 0; 2756 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size()); 2757 if (errcode != arg_in_range) { 2758 jio_fprintf(defaultStream::error_stream(), 2759 "Invalid argument: %s. Must be at least %luK.\n", option->optionString, 2760 os::vm_page_size()/K); 2761 return JNI_EINVAL; 2762 } 2763 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) { 2764 return JNI_EINVAL; 2765 } 2766 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2767 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2768 julong long_ReservedCodeCacheSize = 0; 2769 2770 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2771 if (errcode != arg_in_range) { 2772 jio_fprintf(defaultStream::error_stream(), 2773 "Invalid maximum code cache size: %s.\n", option->optionString); 2774 return JNI_EINVAL; 2775 } 2776 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) { 2777 return JNI_EINVAL; 2778 } 2779 // -XX:NonNMethodCodeHeapSize= 2780 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) { 2781 julong long_NonNMethodCodeHeapSize = 0; 2782 2783 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1); 2784 if (errcode != arg_in_range) { 2785 jio_fprintf(defaultStream::error_stream(), 2786 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString); 2787 return JNI_EINVAL; 2788 } 2789 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) { 2790 return JNI_EINVAL; 2791 } 2792 // -XX:ProfiledCodeHeapSize= 2793 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) { 2794 julong long_ProfiledCodeHeapSize = 0; 2795 2796 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1); 2797 if (errcode != arg_in_range) { 2798 jio_fprintf(defaultStream::error_stream(), 2799 "Invalid maximum profiled code heap size: %s.\n", option->optionString); 2800 return JNI_EINVAL; 2801 } 2802 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) { 2803 return JNI_EINVAL; 2804 } 2805 // -XX:NonProfiledCodeHeapSizee= 2806 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) { 2807 julong long_NonProfiledCodeHeapSize = 0; 2808 2809 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1); 2810 if (errcode != arg_in_range) { 2811 jio_fprintf(defaultStream::error_stream(), 2812 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString); 2813 return JNI_EINVAL; 2814 } 2815 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) { 2816 return JNI_EINVAL; 2817 } 2818 // -green 2819 } else if (match_option(option, "-green")) { 2820 jio_fprintf(defaultStream::error_stream(), 2821 "Green threads support not available\n"); 2822 return JNI_EINVAL; 2823 // -native 2824 } else if (match_option(option, "-native")) { 2825 // HotSpot always uses native threads, ignore silently for compatibility 2826 // -Xrs 2827 } else if (match_option(option, "-Xrs")) { 2828 // Classic/EVM option, new functionality 2829 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) { 2830 return JNI_EINVAL; 2831 } 2832 // -Xprof 2833 } else if (match_option(option, "-Xprof")) { 2834 char version[256]; 2835 // Obsolete in JDK 10 2836 JDK_Version::jdk(10).to_string(version, sizeof(version)); 2837 warning("Ignoring option %s; support was removed in %s", option->optionString, version); 2838 // -Xconcurrentio 2839 } else if (match_option(option, "-Xconcurrentio")) { 2840 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) { 2841 return JNI_EINVAL; 2842 } 2843 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { 2844 return JNI_EINVAL; 2845 } 2846 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) { 2847 return JNI_EINVAL; 2848 } 2849 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) { 2850 return JNI_EINVAL; 2851 } 2852 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation 2853 return JNI_EINVAL; 2854 } 2855 2856 // -Xinternalversion 2857 } else if (match_option(option, "-Xinternalversion")) { 2858 jio_fprintf(defaultStream::output_stream(), "%s\n", 2859 VM_Version::internal_vm_info_string()); 2860 vm_exit(0); 2861 #ifndef PRODUCT 2862 // -Xprintflags 2863 } else if (match_option(option, "-Xprintflags")) { 2864 CommandLineFlags::printFlags(tty, false); 2865 vm_exit(0); 2866 #endif 2867 // -D 2868 } else if (match_option(option, "-D", &tail)) { 2869 const char* value; 2870 if (match_option(option, "-Djava.endorsed.dirs=", &value) && 2871 *value!= '\0' && strcmp(value, "\"\"") != 0) { 2872 // abort if -Djava.endorsed.dirs is set 2873 jio_fprintf(defaultStream::output_stream(), 2874 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n" 2875 "in modular form will be supported via the concept of upgradeable modules.\n", value); 2876 return JNI_EINVAL; 2877 } 2878 if (match_option(option, "-Djava.ext.dirs=", &value) && 2879 *value != '\0' && strcmp(value, "\"\"") != 0) { 2880 // abort if -Djava.ext.dirs is set 2881 jio_fprintf(defaultStream::output_stream(), 2882 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value); 2883 return JNI_EINVAL; 2884 } 2885 // Check for module related properties. They must be set using the modules 2886 // options. For example: use "--add-modules=java.sql", not 2887 // "-Djdk.module.addmods=java.sql" 2888 if (is_internal_module_property(option->optionString + 2)) { 2889 needs_module_property_warning = true; 2890 continue; 2891 } 2892 2893 if (!add_property(tail)) { 2894 return JNI_ENOMEM; 2895 } 2896 // Out of the box management support 2897 if (match_option(option, "-Dcom.sun.management", &tail)) { 2898 #if INCLUDE_MANAGEMENT 2899 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) { 2900 return JNI_EINVAL; 2901 } 2902 // management agent in module jdk.management.agent 2903 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) { 2904 return JNI_ENOMEM; 2905 } 2906 #else 2907 jio_fprintf(defaultStream::output_stream(), 2908 "-Dcom.sun.management is not supported in this VM.\n"); 2909 return JNI_ERR; 2910 #endif 2911 } 2912 // -Xint 2913 } else if (match_option(option, "-Xint")) { 2914 set_mode_flags(_int); 2915 // -Xmixed 2916 } else if (match_option(option, "-Xmixed")) { 2917 set_mode_flags(_mixed); 2918 // -Xcomp 2919 } else if (match_option(option, "-Xcomp")) { 2920 // for testing the compiler; turn off all flags that inhibit compilation 2921 set_mode_flags(_comp); 2922 // -Xshare:dump 2923 } else if (match_option(option, "-Xshare:dump")) { 2924 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) { 2925 return JNI_EINVAL; 2926 } 2927 set_mode_flags(_int); // Prevent compilation, which creates objects 2928 // -Xshare:on 2929 } else if (match_option(option, "-Xshare:on")) { 2930 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 2931 return JNI_EINVAL; 2932 } 2933 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 2934 return JNI_EINVAL; 2935 } 2936 // -Xshare:auto 2937 } else if (match_option(option, "-Xshare:auto")) { 2938 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 2939 return JNI_EINVAL; 2940 } 2941 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 2942 return JNI_EINVAL; 2943 } 2944 // -Xshare:off 2945 } else if (match_option(option, "-Xshare:off")) { 2946 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) { 2947 return JNI_EINVAL; 2948 } 2949 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { 2950 return JNI_EINVAL; 2951 } 2952 // -Xverify 2953 } else if (match_option(option, "-Xverify", &tail)) { 2954 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 2955 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) { 2956 return JNI_EINVAL; 2957 } 2958 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 2959 return JNI_EINVAL; 2960 } 2961 } else if (strcmp(tail, ":remote") == 0) { 2962 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 2963 return JNI_EINVAL; 2964 } 2965 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { 2966 return JNI_EINVAL; 2967 } 2968 } else if (strcmp(tail, ":none") == 0) { 2969 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { 2970 return JNI_EINVAL; 2971 } 2972 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) { 2973 return JNI_EINVAL; 2974 } 2975 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 2976 return JNI_EINVAL; 2977 } 2978 // -Xdebug 2979 } else if (match_option(option, "-Xdebug")) { 2980 // note this flag has been used, then ignore 2981 set_xdebug_mode(true); 2982 // -Xnoagent 2983 } else if (match_option(option, "-Xnoagent")) { 2984 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 2985 } else if (match_option(option, "-Xloggc:", &tail)) { 2986 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename> 2987 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail); 2988 _gc_log_filename = os::strdup_check_oom(tail); 2989 } else if (match_option(option, "-Xlog", &tail)) { 2990 bool ret = false; 2991 if (strcmp(tail, ":help") == 0) { 2992 LogConfiguration::print_command_line_help(defaultStream::output_stream()); 2993 vm_exit(0); 2994 } else if (strcmp(tail, ":disable") == 0) { 2995 LogConfiguration::disable_logging(); 2996 ret = true; 2997 } else if (*tail == '\0') { 2998 ret = LogConfiguration::parse_command_line_arguments(); 2999 assert(ret, "-Xlog without arguments should never fail to parse"); 3000 } else if (*tail == ':') { 3001 ret = LogConfiguration::parse_command_line_arguments(tail + 1); 3002 } 3003 if (ret == false) { 3004 jio_fprintf(defaultStream::error_stream(), 3005 "Invalid -Xlog option '-Xlog%s'\n", 3006 tail); 3007 return JNI_EINVAL; 3008 } 3009 // JNI hooks 3010 } else if (match_option(option, "-Xcheck", &tail)) { 3011 if (!strcmp(tail, ":jni")) { 3012 #if !INCLUDE_JNI_CHECK 3013 warning("JNI CHECKING is not supported in this VM"); 3014 #else 3015 CheckJNICalls = true; 3016 #endif // INCLUDE_JNI_CHECK 3017 } else if (is_bad_option(option, args->ignoreUnrecognized, 3018 "check")) { 3019 return JNI_EINVAL; 3020 } 3021 } else if (match_option(option, "vfprintf")) { 3022 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 3023 } else if (match_option(option, "exit")) { 3024 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 3025 } else if (match_option(option, "abort")) { 3026 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 3027 // -XX:+AggressiveHeap 3028 } else if (match_option(option, "-XX:+AggressiveHeap")) { 3029 jint result = set_aggressive_heap_flags(); 3030 if (result != JNI_OK) { 3031 return result; 3032 } 3033 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 3034 // and the last option wins. 3035 } else if (match_option(option, "-XX:+NeverTenure")) { 3036 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) { 3037 return JNI_EINVAL; 3038 } 3039 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3040 return JNI_EINVAL; 3041 } 3042 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) { 3043 return JNI_EINVAL; 3044 } 3045 } else if (match_option(option, "-XX:+AlwaysTenure")) { 3046 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3047 return JNI_EINVAL; 3048 } 3049 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3050 return JNI_EINVAL; 3051 } 3052 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) { 3053 return JNI_EINVAL; 3054 } 3055 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 3056 uintx max_tenuring_thresh = 0; 3057 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) { 3058 jio_fprintf(defaultStream::error_stream(), 3059 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail); 3060 return JNI_EINVAL; 3061 } 3062 3063 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) { 3064 return JNI_EINVAL; 3065 } 3066 3067 if (MaxTenuringThreshold == 0) { 3068 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3069 return JNI_EINVAL; 3070 } 3071 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { 3072 return JNI_EINVAL; 3073 } 3074 } else { 3075 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { 3076 return JNI_EINVAL; 3077 } 3078 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { 3079 return JNI_EINVAL; 3080 } 3081 } 3082 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) { 3083 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) { 3084 return JNI_EINVAL; 3085 } 3086 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) { 3087 return JNI_EINVAL; 3088 } 3089 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) { 3090 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) { 3091 return JNI_EINVAL; 3092 } 3093 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) { 3094 return JNI_EINVAL; 3095 } 3096 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) { 3097 #if defined(DTRACE_ENABLED) 3098 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) { 3099 return JNI_EINVAL; 3100 } 3101 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) { 3102 return JNI_EINVAL; 3103 } 3104 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) { 3105 return JNI_EINVAL; 3106 } 3107 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) { 3108 return JNI_EINVAL; 3109 } 3110 #else // defined(DTRACE_ENABLED) 3111 jio_fprintf(defaultStream::error_stream(), 3112 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 3113 return JNI_EINVAL; 3114 #endif // defined(DTRACE_ENABLED) 3115 #ifdef ASSERT 3116 } else if (match_option(option, "-XX:+FullGCALot")) { 3117 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) { 3118 return JNI_EINVAL; 3119 } 3120 // disable scavenge before parallel mark-compact 3121 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { 3122 return JNI_EINVAL; 3123 } 3124 #endif 3125 #if !INCLUDE_MANAGEMENT 3126 } else if (match_option(option, "-XX:+ManagementServer")) { 3127 jio_fprintf(defaultStream::error_stream(), 3128 "ManagementServer is not supported in this VM.\n"); 3129 return JNI_ERR; 3130 #endif // INCLUDE_MANAGEMENT 3131 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 3132 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have 3133 // already been handled 3134 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) && 3135 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) { 3136 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 3137 return JNI_EINVAL; 3138 } 3139 } 3140 // Unknown option 3141 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 3142 return JNI_ERR; 3143 } 3144 } 3145 3146 // PrintSharedArchiveAndExit will turn on 3147 // -Xshare:on 3148 // -Xlog:class+path=info 3149 if (PrintSharedArchiveAndExit) { 3150 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { 3151 return JNI_EINVAL; 3152 } 3153 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { 3154 return JNI_EINVAL; 3155 } 3156 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path)); 3157 } 3158 3159 // Change the default value for flags which have different default values 3160 // when working with older JDKs. 3161 #ifdef LINUX 3162 if (JDK_Version::current().compare_major(6) <= 0 && 3163 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 3164 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 3165 } 3166 #endif // LINUX 3167 fix_appclasspath(); 3168 return JNI_OK; 3169 } 3170 3171 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) { 3172 // For java.base check for duplicate --patch-module options being specified on the command line. 3173 // This check is only required for java.base, all other duplicate module specifications 3174 // will be checked during module system initialization. The module system initialization 3175 // will throw an ExceptionInInitializerError if this situation occurs. 3176 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 3177 if (*patch_mod_javabase) { 3178 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module"); 3179 } else { 3180 *patch_mod_javabase = true; 3181 } 3182 } 3183 3184 // Create GrowableArray lazily, only if --patch-module has been specified 3185 if (_patch_mod_prefix == NULL) { 3186 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true); 3187 } 3188 3189 _patch_mod_prefix->push(new ModulePatchPath(module_name, path)); 3190 } 3191 3192 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3193 // 3194 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3195 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3196 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3197 // path is treated as the current directory. 3198 // 3199 // This causes problems with CDS, which requires that all directories specified in the classpath 3200 // must be empty. In most cases, applications do NOT want to load classes from the current 3201 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3202 // scripts compatible with CDS. 3203 void Arguments::fix_appclasspath() { 3204 if (IgnoreEmptyClassPaths) { 3205 const char separator = *os::path_separator(); 3206 const char* src = _java_class_path->value(); 3207 3208 // skip over all the leading empty paths 3209 while (*src == separator) { 3210 src ++; 3211 } 3212 3213 char* copy = os::strdup_check_oom(src, mtArguments); 3214 3215 // trim all trailing empty paths 3216 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3217 *tail = '\0'; 3218 } 3219 3220 char from[3] = {separator, separator, '\0'}; 3221 char to [2] = {separator, '\0'}; 3222 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3223 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3224 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3225 } 3226 3227 _java_class_path->set_writeable_value(copy); 3228 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3229 } 3230 } 3231 3232 static bool has_jar_files(const char* directory) { 3233 DIR* dir = os::opendir(directory); 3234 if (dir == NULL) return false; 3235 3236 struct dirent *entry; 3237 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtArguments); 3238 bool hasJarFile = false; 3239 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 3240 const char* name = entry->d_name; 3241 const char* ext = name + strlen(name) - 4; 3242 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0); 3243 } 3244 FREE_C_HEAP_ARRAY(char, dbuf); 3245 os::closedir(dir); 3246 return hasJarFile ; 3247 } 3248 3249 static int check_non_empty_dirs(const char* path) { 3250 const char separator = *os::path_separator(); 3251 const char* const end = path + strlen(path); 3252 int nonEmptyDirs = 0; 3253 while (path < end) { 3254 const char* tmp_end = strchr(path, separator); 3255 if (tmp_end == NULL) { 3256 if (has_jar_files(path)) { 3257 nonEmptyDirs++; 3258 jio_fprintf(defaultStream::output_stream(), 3259 "Non-empty directory: %s\n", path); 3260 } 3261 path = end; 3262 } else { 3263 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtArguments); 3264 memcpy(dirpath, path, tmp_end - path); 3265 dirpath[tmp_end - path] = '\0'; 3266 if (has_jar_files(dirpath)) { 3267 nonEmptyDirs++; 3268 jio_fprintf(defaultStream::output_stream(), 3269 "Non-empty directory: %s\n", dirpath); 3270 } 3271 FREE_C_HEAP_ARRAY(char, dirpath); 3272 path = tmp_end + 1; 3273 } 3274 } 3275 return nonEmptyDirs; 3276 } 3277 3278 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) { 3279 // check if the default lib/endorsed directory exists; if so, error 3280 char path[JVM_MAXPATHLEN]; 3281 const char* fileSep = os::file_separator(); 3282 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); 3283 3284 if (CheckEndorsedAndExtDirs) { 3285 int nonEmptyDirs = 0; 3286 // check endorsed directory 3287 nonEmptyDirs += check_non_empty_dirs(path); 3288 // check the extension directories 3289 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs()); 3290 if (nonEmptyDirs > 0) { 3291 return JNI_ERR; 3292 } 3293 } 3294 3295 DIR* dir = os::opendir(path); 3296 if (dir != NULL) { 3297 jio_fprintf(defaultStream::output_stream(), 3298 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n" 3299 "in modular form will be supported via the concept of upgradeable modules.\n"); 3300 os::closedir(dir); 3301 return JNI_ERR; 3302 } 3303 3304 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); 3305 dir = os::opendir(path); 3306 if (dir != NULL) { 3307 jio_fprintf(defaultStream::output_stream(), 3308 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; " 3309 "Use -classpath instead.\n."); 3310 os::closedir(dir); 3311 return JNI_ERR; 3312 } 3313 3314 // This must be done after all arguments have been processed. 3315 // java_compiler() true means set to "NONE" or empty. 3316 if (java_compiler() && !xdebug_mode()) { 3317 // For backwards compatibility, we switch to interpreted mode if 3318 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3319 // not specified. 3320 set_mode_flags(_int); 3321 } 3322 3323 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode), 3324 // but like -Xint, leave compilation thresholds unaffected. 3325 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well. 3326 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) { 3327 set_mode_flags(_int); 3328 } 3329 3330 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3331 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3332 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3333 } 3334 3335 #if !defined(COMPILER2) && !INCLUDE_JVMCI 3336 // Don't degrade server performance for footprint 3337 if (FLAG_IS_DEFAULT(UseLargePages) && 3338 MaxHeapSize < LargePageHeapSizeThreshold) { 3339 // No need for large granularity pages w/small heaps. 3340 // Note that large pages are enabled/disabled for both the 3341 // Java heap and the code cache. 3342 FLAG_SET_DEFAULT(UseLargePages, false); 3343 } 3344 3345 #elif defined(COMPILER2) 3346 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 3347 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 3348 } 3349 #endif 3350 3351 #if !defined(COMPILER2) && !INCLUDE_JVMCI 3352 UNSUPPORTED_OPTION(ProfileInterpreter); 3353 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter)); 3354 #endif 3355 3356 #ifndef TIERED 3357 // Tiered compilation is undefined. 3358 UNSUPPORTED_OPTION(TieredCompilation); 3359 #endif 3360 3361 #if INCLUDE_JVMCI 3362 if (EnableJVMCI && 3363 !create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) { 3364 return JNI_ENOMEM; 3365 } 3366 #endif 3367 3368 // If we are running in a headless jre, force java.awt.headless property 3369 // to be true unless the property has already been set. 3370 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. 3371 if (os::is_headless_jre()) { 3372 const char* headless = Arguments::get_property("java.awt.headless"); 3373 if (headless == NULL) { 3374 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS"); 3375 if (headless_env == NULL) { 3376 if (!add_property("java.awt.headless=true")) { 3377 return JNI_ENOMEM; 3378 } 3379 } else { 3380 char buffer[256]; 3381 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env); 3382 if (!add_property(buffer)) { 3383 return JNI_ENOMEM; 3384 } 3385 } 3386 } 3387 } 3388 3389 if (!check_vm_args_consistency()) { 3390 return JNI_ERR; 3391 } 3392 3393 #if INCLUDE_JVMCI 3394 if (UseJVMCICompiler) { 3395 Compilation_mode = CompMode_server; 3396 } 3397 #endif 3398 3399 #if INCLUDE_CDS 3400 if (DumpSharedSpaces) { 3401 // Disable biased locking now as it interferes with the clean up of 3402 // the archived Klasses and Java string objects (at dump time only). 3403 UseBiasedLocking = false; 3404 } 3405 if (UseSharedSpaces && patch_mod_javabase) { 3406 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched."); 3407 } 3408 #endif 3409 3410 return JNI_OK; 3411 } 3412 3413 // Helper class for controlling the lifetime of JavaVMInitArgs 3414 // objects. The contents of the JavaVMInitArgs are guaranteed to be 3415 // deleted on the destruction of the ScopedVMInitArgs object. 3416 class ScopedVMInitArgs : public StackObj { 3417 private: 3418 JavaVMInitArgs _args; 3419 char* _container_name; 3420 bool _is_set; 3421 char* _vm_options_file_arg; 3422 3423 public: 3424 ScopedVMInitArgs(const char *container_name) { 3425 _args.version = JNI_VERSION_1_2; 3426 _args.nOptions = 0; 3427 _args.options = NULL; 3428 _args.ignoreUnrecognized = false; 3429 _container_name = (char *)container_name; 3430 _is_set = false; 3431 _vm_options_file_arg = NULL; 3432 } 3433 3434 // Populates the JavaVMInitArgs object represented by this 3435 // ScopedVMInitArgs object with the arguments in options. The 3436 // allocated memory is deleted by the destructor. If this method 3437 // returns anything other than JNI_OK, then this object is in a 3438 // partially constructed state, and should be abandoned. 3439 jint set_args(GrowableArray<JavaVMOption>* options) { 3440 _is_set = true; 3441 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL( 3442 JavaVMOption, options->length(), mtArguments); 3443 if (options_arr == NULL) { 3444 return JNI_ENOMEM; 3445 } 3446 _args.options = options_arr; 3447 3448 for (int i = 0; i < options->length(); i++) { 3449 options_arr[i] = options->at(i); 3450 options_arr[i].optionString = os::strdup(options_arr[i].optionString); 3451 if (options_arr[i].optionString == NULL) { 3452 // Rely on the destructor to do cleanup. 3453 _args.nOptions = i; 3454 return JNI_ENOMEM; 3455 } 3456 } 3457 3458 _args.nOptions = options->length(); 3459 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3460 return JNI_OK; 3461 } 3462 3463 JavaVMInitArgs* get() { return &_args; } 3464 char* container_name() { return _container_name; } 3465 bool is_set() { return _is_set; } 3466 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; } 3467 char* vm_options_file_arg() { return _vm_options_file_arg; } 3468 3469 void set_vm_options_file_arg(const char *vm_options_file_arg) { 3470 if (_vm_options_file_arg != NULL) { 3471 os::free(_vm_options_file_arg); 3472 } 3473 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg); 3474 } 3475 3476 ~ScopedVMInitArgs() { 3477 if (_vm_options_file_arg != NULL) { 3478 os::free(_vm_options_file_arg); 3479 } 3480 if (_args.options == NULL) return; 3481 for (int i = 0; i < _args.nOptions; i++) { 3482 os::free(_args.options[i].optionString); 3483 } 3484 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options); 3485 } 3486 3487 // Insert options into this option list, to replace option at 3488 // vm_options_file_pos (-XX:VMOptionsFile) 3489 jint insert(const JavaVMInitArgs* args, 3490 const JavaVMInitArgs* args_to_insert, 3491 const int vm_options_file_pos) { 3492 assert(_args.options == NULL, "shouldn't be set yet"); 3493 assert(args_to_insert->nOptions != 0, "there should be args to insert"); 3494 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set"); 3495 3496 int length = args->nOptions + args_to_insert->nOptions - 1; 3497 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) 3498 GrowableArray<JavaVMOption>(length, true); // Construct new option array 3499 for (int i = 0; i < args->nOptions; i++) { 3500 if (i == vm_options_file_pos) { 3501 // insert the new options starting at the same place as the 3502 // -XX:VMOptionsFile option 3503 for (int j = 0; j < args_to_insert->nOptions; j++) { 3504 options->push(args_to_insert->options[j]); 3505 } 3506 } else { 3507 options->push(args->options[i]); 3508 } 3509 } 3510 // make into options array 3511 jint result = set_args(options); 3512 delete options; 3513 return result; 3514 } 3515 }; 3516 3517 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) { 3518 return parse_options_environment_variable("_JAVA_OPTIONS", args); 3519 } 3520 3521 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) { 3522 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args); 3523 } 3524 3525 jint Arguments::parse_options_environment_variable(const char* name, 3526 ScopedVMInitArgs* vm_args) { 3527 char *buffer = ::getenv(name); 3528 3529 // Don't check this environment variable if user has special privileges 3530 // (e.g. unix su command). 3531 if (buffer == NULL || os::have_special_privileges()) { 3532 return JNI_OK; 3533 } 3534 3535 if ((buffer = os::strdup(buffer)) == NULL) { 3536 return JNI_ENOMEM; 3537 } 3538 3539 jio_fprintf(defaultStream::error_stream(), 3540 "Picked up %s: %s\n", name, buffer); 3541 3542 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args); 3543 3544 os::free(buffer); 3545 return retcode; 3546 } 3547 3548 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) { 3549 // read file into buffer 3550 int fd = ::open(file_name, O_RDONLY); 3551 if (fd < 0) { 3552 jio_fprintf(defaultStream::error_stream(), 3553 "Could not open options file '%s'\n", 3554 file_name); 3555 return JNI_ERR; 3556 } 3557 3558 struct stat stbuf; 3559 int retcode = os::stat(file_name, &stbuf); 3560 if (retcode != 0) { 3561 jio_fprintf(defaultStream::error_stream(), 3562 "Could not stat options file '%s'\n", 3563 file_name); 3564 os::close(fd); 3565 return JNI_ERR; 3566 } 3567 3568 if (stbuf.st_size == 0) { 3569 // tell caller there is no option data and that is ok 3570 os::close(fd); 3571 return JNI_OK; 3572 } 3573 3574 // '+ 1' for NULL termination even with max bytes 3575 size_t bytes_alloc = stbuf.st_size + 1; 3576 3577 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments); 3578 if (NULL == buf) { 3579 jio_fprintf(defaultStream::error_stream(), 3580 "Could not allocate read buffer for options file parse\n"); 3581 os::close(fd); 3582 return JNI_ENOMEM; 3583 } 3584 3585 memset(buf, 0, bytes_alloc); 3586 3587 // Fill buffer 3588 // Use ::read() instead of os::read because os::read() 3589 // might do a thread state transition 3590 // and it is too early for that here 3591 3592 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc); 3593 os::close(fd); 3594 if (bytes_read < 0) { 3595 FREE_C_HEAP_ARRAY(char, buf); 3596 jio_fprintf(defaultStream::error_stream(), 3597 "Could not read options file '%s'\n", file_name); 3598 return JNI_ERR; 3599 } 3600 3601 if (bytes_read == 0) { 3602 // tell caller there is no option data and that is ok 3603 FREE_C_HEAP_ARRAY(char, buf); 3604 return JNI_OK; 3605 } 3606 3607 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args); 3608 3609 FREE_C_HEAP_ARRAY(char, buf); 3610 return retcode; 3611 } 3612 3613 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) { 3614 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array 3615 3616 // some pointers to help with parsing 3617 char *buffer_end = buffer + buf_len; 3618 char *opt_hd = buffer; 3619 char *wrt = buffer; 3620 char *rd = buffer; 3621 3622 // parse all options 3623 while (rd < buffer_end) { 3624 // skip leading white space from the input string 3625 while (rd < buffer_end && isspace(*rd)) { 3626 rd++; 3627 } 3628 3629 if (rd >= buffer_end) { 3630 break; 3631 } 3632 3633 // Remember this is where we found the head of the token. 3634 opt_hd = wrt; 3635 3636 // Tokens are strings of non white space characters separated 3637 // by one or more white spaces. 3638 while (rd < buffer_end && !isspace(*rd)) { 3639 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3640 int quote = *rd; // matching quote to look for 3641 rd++; // don't copy open quote 3642 while (rd < buffer_end && *rd != quote) { 3643 // include everything (even spaces) 3644 // up until the close quote 3645 *wrt++ = *rd++; // copy to option string 3646 } 3647 3648 if (rd < buffer_end) { 3649 rd++; // don't copy close quote 3650 } else { 3651 // did not see closing quote 3652 jio_fprintf(defaultStream::error_stream(), 3653 "Unmatched quote in %s\n", name); 3654 delete options; 3655 return JNI_ERR; 3656 } 3657 } else { 3658 *wrt++ = *rd++; // copy to option string 3659 } 3660 } 3661 3662 // steal a white space character and set it to NULL 3663 *wrt++ = '\0'; 3664 // We now have a complete token 3665 3666 JavaVMOption option; 3667 option.optionString = opt_hd; 3668 option.extraInfo = NULL; 3669 3670 options->append(option); // Fill in option 3671 3672 rd++; // Advance to next character 3673 } 3674 3675 // Fill out JavaVMInitArgs structure. 3676 jint status = vm_args->set_args(options); 3677 3678 delete options; 3679 return status; 3680 } 3681 3682 void Arguments::set_shared_spaces_flags() { 3683 if (DumpSharedSpaces) { 3684 if (FailOverToOldVerifier) { 3685 // Don't fall back to the old verifier on verification failure. If a 3686 // class fails verification with the split verifier, it might fail the 3687 // CDS runtime verifier constraint check. In that case, we don't want 3688 // to share the class. We only archive classes that pass the split verifier. 3689 FLAG_SET_DEFAULT(FailOverToOldVerifier, false); 3690 } 3691 3692 if (RequireSharedSpaces) { 3693 warning("Cannot dump shared archive while using shared archive"); 3694 } 3695 UseSharedSpaces = false; 3696 #ifdef _LP64 3697 if (!UseCompressedOops || !UseCompressedClassPointers) { 3698 vm_exit_during_initialization( 3699 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3700 } 3701 } else { 3702 if (!UseCompressedOops || !UseCompressedClassPointers) { 3703 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3704 } 3705 #endif 3706 } 3707 } 3708 3709 // Sharing support 3710 // Construct the path to the archive 3711 static char* get_shared_archive_path() { 3712 char *shared_archive_path; 3713 if (SharedArchiveFile == NULL) { 3714 char jvm_path[JVM_MAXPATHLEN]; 3715 os::jvm_path(jvm_path, sizeof(jvm_path)); 3716 char *end = strrchr(jvm_path, *os::file_separator()); 3717 if (end != NULL) *end = '\0'; 3718 size_t jvm_path_len = strlen(jvm_path); 3719 size_t file_sep_len = strlen(os::file_separator()); 3720 const size_t len = jvm_path_len + file_sep_len + 20; 3721 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments); 3722 if (shared_archive_path != NULL) { 3723 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa", 3724 jvm_path, os::file_separator()); 3725 } 3726 } else { 3727 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments); 3728 } 3729 return shared_archive_path; 3730 } 3731 3732 #ifndef PRODUCT 3733 // Determine whether LogVMOutput should be implicitly turned on. 3734 static bool use_vm_log() { 3735 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3736 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3737 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3738 PrintAssembly || TraceDeoptimization || TraceDependencies || 3739 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3740 return true; 3741 } 3742 3743 #ifdef COMPILER1 3744 if (PrintC1Statistics) { 3745 return true; 3746 } 3747 #endif // COMPILER1 3748 3749 #ifdef COMPILER2 3750 if (PrintOptoAssembly || PrintOptoStatistics) { 3751 return true; 3752 } 3753 #endif // COMPILER2 3754 3755 return false; 3756 } 3757 3758 #endif // PRODUCT 3759 3760 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) { 3761 for (int index = 0; index < args->nOptions; index++) { 3762 const JavaVMOption* option = args->options + index; 3763 const char* tail; 3764 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3765 return true; 3766 } 3767 } 3768 return false; 3769 } 3770 3771 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args, 3772 const char* vm_options_file, 3773 const int vm_options_file_pos, 3774 ScopedVMInitArgs* vm_options_file_args, 3775 ScopedVMInitArgs* args_out) { 3776 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args); 3777 if (code != JNI_OK) { 3778 return code; 3779 } 3780 3781 if (vm_options_file_args->get()->nOptions < 1) { 3782 return JNI_OK; 3783 } 3784 3785 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) { 3786 jio_fprintf(defaultStream::error_stream(), 3787 "A VM options file may not refer to a VM options file. " 3788 "Specification of '-XX:VMOptionsFile=<file-name>' in the " 3789 "options file '%s' in options container '%s' is an error.\n", 3790 vm_options_file_args->vm_options_file_arg(), 3791 vm_options_file_args->container_name()); 3792 return JNI_EINVAL; 3793 } 3794 3795 return args_out->insert(args, vm_options_file_args->get(), 3796 vm_options_file_pos); 3797 } 3798 3799 // Expand -XX:VMOptionsFile found in args_in as needed. 3800 // mod_args and args_out parameters may return values as needed. 3801 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in, 3802 ScopedVMInitArgs* mod_args, 3803 JavaVMInitArgs** args_out) { 3804 jint code = match_special_option_and_act(args_in, mod_args); 3805 if (code != JNI_OK) { 3806 return code; 3807 } 3808 3809 if (mod_args->is_set()) { 3810 // args_in contains -XX:VMOptionsFile and mod_args contains the 3811 // original options from args_in along with the options expanded 3812 // from the VMOptionsFile. Return a short-hand to the caller. 3813 *args_out = mod_args->get(); 3814 } else { 3815 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in 3816 } 3817 return JNI_OK; 3818 } 3819 3820 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args, 3821 ScopedVMInitArgs* args_out) { 3822 // Remaining part of option string 3823 const char* tail; 3824 ScopedVMInitArgs vm_options_file_args(args_out->container_name()); 3825 3826 for (int index = 0; index < args->nOptions; index++) { 3827 const JavaVMOption* option = args->options + index; 3828 if (ArgumentsExt::process_options(option)) { 3829 continue; 3830 } 3831 if (match_option(option, "-XX:Flags=", &tail)) { 3832 Arguments::set_jvm_flags_file(tail); 3833 continue; 3834 } 3835 if (match_option(option, "-XX:VMOptionsFile=", &tail)) { 3836 if (vm_options_file_args.found_vm_options_file_arg()) { 3837 jio_fprintf(defaultStream::error_stream(), 3838 "The option '%s' is already specified in the options " 3839 "container '%s' so the specification of '%s' in the " 3840 "same options container is an error.\n", 3841 vm_options_file_args.vm_options_file_arg(), 3842 vm_options_file_args.container_name(), 3843 option->optionString); 3844 return JNI_EINVAL; 3845 } 3846 vm_options_file_args.set_vm_options_file_arg(option->optionString); 3847 // If there's a VMOptionsFile, parse that 3848 jint code = insert_vm_options_file(args, tail, index, 3849 &vm_options_file_args, args_out); 3850 if (code != JNI_OK) { 3851 return code; 3852 } 3853 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg()); 3854 if (args_out->is_set()) { 3855 // The VMOptions file inserted some options so switch 'args' 3856 // to the new set of options, and continue processing which 3857 // preserves "last option wins" semantics. 3858 args = args_out->get(); 3859 // The first option from the VMOptionsFile replaces the 3860 // current option. So we back track to process the 3861 // replacement option. 3862 index--; 3863 } 3864 continue; 3865 } 3866 if (match_option(option, "-XX:+PrintVMOptions")) { 3867 PrintVMOptions = true; 3868 continue; 3869 } 3870 if (match_option(option, "-XX:-PrintVMOptions")) { 3871 PrintVMOptions = false; 3872 continue; 3873 } 3874 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) { 3875 IgnoreUnrecognizedVMOptions = true; 3876 continue; 3877 } 3878 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) { 3879 IgnoreUnrecognizedVMOptions = false; 3880 continue; 3881 } 3882 if (match_option(option, "-XX:+PrintFlagsInitial")) { 3883 CommandLineFlags::printFlags(tty, false); 3884 vm_exit(0); 3885 } 3886 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3887 #if INCLUDE_NMT 3888 // The launcher did not setup nmt environment variable properly. 3889 if (!MemTracker::check_launcher_nmt_support(tail)) { 3890 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 3891 } 3892 3893 // Verify if nmt option is valid. 3894 if (MemTracker::verify_nmt_option()) { 3895 // Late initialization, still in single-threaded mode. 3896 if (MemTracker::tracking_level() >= NMT_summary) { 3897 MemTracker::init(); 3898 } 3899 } else { 3900 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 3901 } 3902 continue; 3903 #else 3904 jio_fprintf(defaultStream::error_stream(), 3905 "Native Memory Tracking is not supported in this VM\n"); 3906 return JNI_ERR; 3907 #endif 3908 } 3909 3910 #ifndef PRODUCT 3911 if (match_option(option, "-XX:+PrintFlagsWithComments")) { 3912 CommandLineFlags::printFlags(tty, true); 3913 vm_exit(0); 3914 } 3915 #endif 3916 } 3917 return JNI_OK; 3918 } 3919 3920 static void print_options(const JavaVMInitArgs *args) { 3921 const char* tail; 3922 for (int index = 0; index < args->nOptions; index++) { 3923 const JavaVMOption *option = args->options + index; 3924 if (match_option(option, "-XX:", &tail)) { 3925 logOption(tail); 3926 } 3927 } 3928 } 3929 3930 bool Arguments::handle_deprecated_print_gc_flags() { 3931 if (PrintGC) { 3932 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead."); 3933 } 3934 if (PrintGCDetails) { 3935 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead."); 3936 } 3937 3938 if (_gc_log_filename != NULL) { 3939 // -Xloggc was used to specify a filename 3940 const char* gc_conf = PrintGCDetails ? "gc*" : "gc"; 3941 3942 LogTarget(Error, logging) target; 3943 LogStream errstream(target); 3944 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream); 3945 } else if (PrintGC || PrintGCDetails) { 3946 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc)); 3947 } 3948 return true; 3949 } 3950 3951 void Arguments::handle_extra_cms_flags(const char* msg) { 3952 SpecialFlag flag; 3953 const char *flag_name = "UseConcMarkSweepGC"; 3954 if (lookup_special_flag(flag_name, flag)) { 3955 handle_aliases_and_deprecation(flag_name, /* print warning */ true); 3956 warning("%s", msg); 3957 } 3958 } 3959 3960 // Parse entry point called from JNI_CreateJavaVM 3961 3962 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) { 3963 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent"); 3964 3965 // Initialize ranges, constraints and writeables 3966 CommandLineFlagRangeList::init(); 3967 CommandLineFlagConstraintList::init(); 3968 CommandLineFlagWriteableList::init(); 3969 3970 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 3971 const char* hotspotrc = ".hotspotrc"; 3972 bool settings_file_specified = false; 3973 bool needs_hotspotrc_warning = false; 3974 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3975 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'"); 3976 3977 // Pointers to current working set of containers 3978 JavaVMInitArgs* cur_cmd_args; 3979 JavaVMInitArgs* cur_java_options_args; 3980 JavaVMInitArgs* cur_java_tool_options_args; 3981 3982 // Containers for modified/expanded options 3983 ScopedVMInitArgs mod_cmd_args("cmd_line_args"); 3984 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); 3985 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'"); 3986 3987 3988 jint code = 3989 parse_java_tool_options_environment_variable(&initial_java_tool_options_args); 3990 if (code != JNI_OK) { 3991 return code; 3992 } 3993 3994 code = parse_java_options_environment_variable(&initial_java_options_args); 3995 if (code != JNI_OK) { 3996 return code; 3997 } 3998 3999 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(), 4000 &mod_java_tool_options_args, 4001 &cur_java_tool_options_args); 4002 if (code != JNI_OK) { 4003 return code; 4004 } 4005 4006 code = expand_vm_options_as_needed(initial_cmd_args, 4007 &mod_cmd_args, 4008 &cur_cmd_args); 4009 if (code != JNI_OK) { 4010 return code; 4011 } 4012 4013 code = expand_vm_options_as_needed(initial_java_options_args.get(), 4014 &mod_java_options_args, 4015 &cur_java_options_args); 4016 if (code != JNI_OK) { 4017 return code; 4018 } 4019 4020 const char* flags_file = Arguments::get_jvm_flags_file(); 4021 settings_file_specified = (flags_file != NULL); 4022 4023 if (IgnoreUnrecognizedVMOptions) { 4024 cur_cmd_args->ignoreUnrecognized = true; 4025 cur_java_tool_options_args->ignoreUnrecognized = true; 4026 cur_java_options_args->ignoreUnrecognized = true; 4027 } 4028 4029 // Parse specified settings file 4030 if (settings_file_specified) { 4031 if (!process_settings_file(flags_file, true, 4032 cur_cmd_args->ignoreUnrecognized)) { 4033 return JNI_EINVAL; 4034 } 4035 } else { 4036 #ifdef ASSERT 4037 // Parse default .hotspotrc settings file 4038 if (!process_settings_file(".hotspotrc", false, 4039 cur_cmd_args->ignoreUnrecognized)) { 4040 return JNI_EINVAL; 4041 } 4042 #else 4043 struct stat buf; 4044 if (os::stat(hotspotrc, &buf) == 0) { 4045 needs_hotspotrc_warning = true; 4046 } 4047 #endif 4048 } 4049 4050 if (PrintVMOptions) { 4051 print_options(cur_java_tool_options_args); 4052 print_options(cur_cmd_args); 4053 print_options(cur_java_options_args); 4054 } 4055 4056 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 4057 jint result = parse_vm_init_args(cur_java_tool_options_args, 4058 cur_java_options_args, 4059 cur_cmd_args); 4060 4061 if (result != JNI_OK) { 4062 return result; 4063 } 4064 4065 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 4066 SharedArchivePath = get_shared_archive_path(); 4067 if (SharedArchivePath == NULL) { 4068 return JNI_ENOMEM; 4069 } 4070 4071 // Set up VerifySharedSpaces 4072 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 4073 VerifySharedSpaces = true; 4074 } 4075 4076 // Delay warning until here so that we've had a chance to process 4077 // the -XX:-PrintWarnings flag 4078 if (needs_hotspotrc_warning) { 4079 warning("%s file is present but has been ignored. " 4080 "Run with -XX:Flags=%s to load the file.", 4081 hotspotrc, hotspotrc); 4082 } 4083 4084 if (needs_module_property_warning) { 4085 warning("Ignoring system property options whose names match the '-Djdk.module.*'." 4086 " names that are reserved for internal use."); 4087 } 4088 4089 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX. 4090 UNSUPPORTED_OPTION(UseLargePages); 4091 #endif 4092 4093 ArgumentsExt::report_unsupported_options(); 4094 4095 #ifndef PRODUCT 4096 if (TraceBytecodesAt != 0) { 4097 TraceBytecodes = true; 4098 } 4099 if (CountCompiledCalls) { 4100 if (UseCounterDecay) { 4101 warning("UseCounterDecay disabled because CountCalls is set"); 4102 UseCounterDecay = false; 4103 } 4104 } 4105 #endif // PRODUCT 4106 4107 if (ScavengeRootsInCode == 0) { 4108 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 4109 warning("Forcing ScavengeRootsInCode non-zero"); 4110 } 4111 ScavengeRootsInCode = 1; 4112 } 4113 4114 if (!handle_deprecated_print_gc_flags()) { 4115 return JNI_EINVAL; 4116 } 4117 4118 // Set object alignment values. 4119 set_object_alignment(); 4120 4121 #if !INCLUDE_CDS 4122 if (DumpSharedSpaces || RequireSharedSpaces) { 4123 jio_fprintf(defaultStream::error_stream(), 4124 "Shared spaces are not supported in this VM\n"); 4125 return JNI_ERR; 4126 } 4127 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || 4128 log_is_enabled(Info, cds)) { 4129 warning("Shared spaces are not supported in this VM"); 4130 FLAG_SET_DEFAULT(UseSharedSpaces, false); 4131 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds)); 4132 } 4133 no_shared_spaces("CDS Disabled"); 4134 #endif // INCLUDE_CDS 4135 4136 return JNI_OK; 4137 } 4138 4139 jint Arguments::apply_ergo() { 4140 // Set flags based on ergonomics. 4141 jint result = set_ergonomics_flags(); 4142 if (result != JNI_OK) return result; 4143 4144 #if INCLUDE_JVMCI 4145 set_jvmci_specific_flags(); 4146 #endif 4147 4148 set_shared_spaces_flags(); 4149 4150 // Check the GC selections again. 4151 if (!check_gc_consistency()) { 4152 return JNI_EINVAL; 4153 } 4154 4155 if (TieredCompilation) { 4156 set_tiered_flags(); 4157 } else { 4158 int max_compilation_policy_choice = 1; 4159 #ifdef COMPILER2 4160 if (is_server_compilation_mode_vm()) { 4161 max_compilation_policy_choice = 2; 4162 } 4163 #endif 4164 // Check if the policy is valid. 4165 if (CompilationPolicyChoice >= max_compilation_policy_choice) { 4166 vm_exit_during_initialization( 4167 "Incompatible compilation policy selected", NULL); 4168 } 4169 // Scale CompileThreshold 4170 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged. 4171 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { 4172 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold)); 4173 } 4174 } 4175 4176 #ifdef COMPILER2 4177 #ifndef PRODUCT 4178 if (PrintIdealGraphLevel > 0) { 4179 FLAG_SET_ERGO(bool, PrintIdealGraph, true); 4180 } 4181 #endif 4182 #endif 4183 4184 // Set heap size based on available physical memory 4185 set_heap_size(); 4186 4187 ArgumentsExt::set_gc_specific_flags(); 4188 4189 // Initialize Metaspace flags and alignments 4190 Metaspace::ergo_initialize(); 4191 4192 // Set bytecode rewriting flags 4193 set_bytecode_flags(); 4194 4195 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 4196 jint code = set_aggressive_opts_flags(); 4197 if (code != JNI_OK) { 4198 return code; 4199 } 4200 4201 // Turn off biased locking for locking debug mode flags, 4202 // which are subtly different from each other but neither works with 4203 // biased locking 4204 if (UseHeavyMonitors 4205 #ifdef COMPILER1 4206 || !UseFastLocking 4207 #endif // COMPILER1 4208 #if INCLUDE_JVMCI 4209 || !JVMCIUseFastLocking 4210 #endif 4211 ) { 4212 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 4213 // flag set to true on command line; warn the user that they 4214 // can't enable biased locking here 4215 warning("Biased Locking is not supported with locking debug flags" 4216 "; ignoring UseBiasedLocking flag." ); 4217 } 4218 UseBiasedLocking = false; 4219 } 4220 4221 #ifdef CC_INTERP 4222 // Clear flags not supported on zero. 4223 FLAG_SET_DEFAULT(ProfileInterpreter, false); 4224 FLAG_SET_DEFAULT(UseBiasedLocking, false); 4225 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 4226 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 4227 #endif // CC_INTERP 4228 4229 #ifdef COMPILER2 4230 if (!EliminateLocks) { 4231 EliminateNestedLocks = false; 4232 } 4233 if (!Inline) { 4234 IncrementalInline = false; 4235 } 4236 #ifndef PRODUCT 4237 if (!IncrementalInline) { 4238 AlwaysIncrementalInline = false; 4239 } 4240 #endif 4241 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { 4242 // nothing to use the profiling, turn if off 4243 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 4244 } 4245 #endif 4246 4247 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 4248 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 4249 DebugNonSafepoints = true; 4250 } 4251 4252 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 4253 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 4254 } 4255 4256 if (UseOnStackReplacement && !UseLoopCounter) { 4257 warning("On-stack-replacement requires loop counters; enabling loop counters"); 4258 FLAG_SET_DEFAULT(UseLoopCounter, true); 4259 } 4260 4261 #ifndef PRODUCT 4262 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 4263 if (use_vm_log()) { 4264 LogVMOutput = true; 4265 } 4266 } 4267 #endif // PRODUCT 4268 4269 if (PrintCommandLineFlags) { 4270 CommandLineFlags::printSetFlags(tty); 4271 } 4272 4273 // Apply CPU specific policy for the BiasedLocking 4274 if (UseBiasedLocking) { 4275 if (!VM_Version::use_biased_locking() && 4276 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 4277 UseBiasedLocking = false; 4278 } 4279 } 4280 #ifdef COMPILER2 4281 if (!UseBiasedLocking || EmitSync != 0) { 4282 UseOptoBiasInlining = false; 4283 } 4284 #endif 4285 4286 return JNI_OK; 4287 } 4288 4289 jint Arguments::adjust_after_os() { 4290 if (UseNUMA) { 4291 if (UseParallelGC || UseParallelOldGC) { 4292 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4293 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4294 } 4295 } 4296 // UseNUMAInterleaving is set to ON for all collectors and 4297 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4298 // such as the parallel collector for Linux and Solaris will 4299 // interleave old gen and survivor spaces on top of NUMA 4300 // allocation policy for the eden space. 4301 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4302 // all platforms and ParallelGC on Windows will interleave all 4303 // of the heap spaces across NUMA nodes. 4304 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4305 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4306 } 4307 } 4308 return JNI_OK; 4309 } 4310 4311 int Arguments::PropertyList_count(SystemProperty* pl) { 4312 int count = 0; 4313 while(pl != NULL) { 4314 count++; 4315 pl = pl->next(); 4316 } 4317 return count; 4318 } 4319 4320 // Return the number of readable properties. 4321 int Arguments::PropertyList_readable_count(SystemProperty* pl) { 4322 int count = 0; 4323 while(pl != NULL) { 4324 if (pl->is_readable()) { 4325 count++; 4326 } 4327 pl = pl->next(); 4328 } 4329 return count; 4330 } 4331 4332 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4333 assert(key != NULL, "just checking"); 4334 SystemProperty* prop; 4335 for (prop = pl; prop != NULL; prop = prop->next()) { 4336 if (strcmp(key, prop->key()) == 0) return prop->value(); 4337 } 4338 return NULL; 4339 } 4340 4341 // Return the value of the requested property provided that it is a readable property. 4342 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) { 4343 assert(key != NULL, "just checking"); 4344 SystemProperty* prop; 4345 // Return the property value if the keys match and the property is not internal or 4346 // it's the special internal property "jdk.boot.class.path.append". 4347 for (prop = pl; prop != NULL; prop = prop->next()) { 4348 if (strcmp(key, prop->key()) == 0) { 4349 if (!prop->internal()) { 4350 return prop->value(); 4351 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) { 4352 return prop->value(); 4353 } else { 4354 // Property is internal and not jdk.boot.class.path.append so return NULL. 4355 return NULL; 4356 } 4357 } 4358 } 4359 return NULL; 4360 } 4361 4362 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4363 int count = 0; 4364 const char* ret_val = NULL; 4365 4366 while(pl != NULL) { 4367 if(count >= index) { 4368 ret_val = pl->key(); 4369 break; 4370 } 4371 count++; 4372 pl = pl->next(); 4373 } 4374 4375 return ret_val; 4376 } 4377 4378 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4379 int count = 0; 4380 char* ret_val = NULL; 4381 4382 while(pl != NULL) { 4383 if(count >= index) { 4384 ret_val = pl->value(); 4385 break; 4386 } 4387 count++; 4388 pl = pl->next(); 4389 } 4390 4391 return ret_val; 4392 } 4393 4394 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4395 SystemProperty* p = *plist; 4396 if (p == NULL) { 4397 *plist = new_p; 4398 } else { 4399 while (p->next() != NULL) { 4400 p = p->next(); 4401 } 4402 p->set_next(new_p); 4403 } 4404 } 4405 4406 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v, 4407 bool writeable, bool internal) { 4408 if (plist == NULL) 4409 return; 4410 4411 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal); 4412 PropertyList_add(plist, new_p); 4413 } 4414 4415 void Arguments::PropertyList_add(SystemProperty *element) { 4416 PropertyList_add(&_system_properties, element); 4417 } 4418 4419 // This add maintains unique property key in the list. 4420 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, 4421 PropertyAppendable append, PropertyWriteable writeable, 4422 PropertyInternal internal) { 4423 if (plist == NULL) 4424 return; 4425 4426 // If property key exist then update with new value. 4427 SystemProperty* prop; 4428 for (prop = *plist; prop != NULL; prop = prop->next()) { 4429 if (strcmp(k, prop->key()) == 0) { 4430 if (append == AppendProperty) { 4431 prop->append_value(v); 4432 } else { 4433 prop->set_value(v); 4434 } 4435 return; 4436 } 4437 } 4438 4439 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty); 4440 } 4441 4442 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4443 // Returns true if all of the source pointed by src has been copied over to 4444 // the destination buffer pointed by buf. Otherwise, returns false. 4445 // Notes: 4446 // 1. If the length (buflen) of the destination buffer excluding the 4447 // NULL terminator character is not long enough for holding the expanded 4448 // pid characters, it also returns false instead of returning the partially 4449 // expanded one. 4450 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4451 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4452 char* buf, size_t buflen) { 4453 const char* p = src; 4454 char* b = buf; 4455 const char* src_end = &src[srclen]; 4456 char* buf_end = &buf[buflen - 1]; 4457 4458 while (p < src_end && b < buf_end) { 4459 if (*p == '%') { 4460 switch (*(++p)) { 4461 case '%': // "%%" ==> "%" 4462 *b++ = *p++; 4463 break; 4464 case 'p': { // "%p" ==> current process id 4465 // buf_end points to the character before the last character so 4466 // that we could write '\0' to the end of the buffer. 4467 size_t buf_sz = buf_end - b + 1; 4468 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4469 4470 // if jio_snprintf fails or the buffer is not long enough to hold 4471 // the expanded pid, returns false. 4472 if (ret < 0 || ret >= (int)buf_sz) { 4473 return false; 4474 } else { 4475 b += ret; 4476 assert(*b == '\0', "fail in copy_expand_pid"); 4477 if (p == src_end && b == buf_end + 1) { 4478 // reach the end of the buffer. 4479 return true; 4480 } 4481 } 4482 p++; 4483 break; 4484 } 4485 default : 4486 *b++ = '%'; 4487 } 4488 } else { 4489 *b++ = *p++; 4490 } 4491 } 4492 *b = '\0'; 4493 return (p == src_end); // return false if not all of the source was copied 4494 }