1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/classLoader.hpp" 27 #include "classfile/javaAssertions.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/symbolTable.hpp" 30 #include "compiler/compilerOracle.hpp" 31 #include "memory/allocation.inline.hpp" 32 #include "memory/cardTableRS.hpp" 33 #include "memory/genCollectedHeap.hpp" 34 #include "memory/referenceProcessor.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "prims/jvmtiExport.hpp" 38 #include "runtime/arguments.hpp" 39 #include "runtime/arguments_ext.hpp" 40 #include "runtime/globals_extension.hpp" 41 #include "runtime/java.hpp" 42 #include "runtime/os.hpp" 43 #include "runtime/vm_version.hpp" 44 #include "services/management.hpp" 45 #include "services/memTracker.hpp" 46 #include "utilities/defaultStream.hpp" 47 #include "utilities/macros.hpp" 48 #include "utilities/stringUtils.hpp" 49 #include "utilities/taskqueue.hpp" 50 #if INCLUDE_ALL_GCS 51 #include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp" 52 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 53 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" 54 #endif // INCLUDE_ALL_GCS 55 56 // Note: This is a special bug reporting site for the JVM 57 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.sun.com/bugreport/crash.jsp" 58 #define DEFAULT_JAVA_LAUNCHER "generic" 59 60 // Disable options not supported in this release, with a warning if they 61 // were explicitly requested on the command-line 62 #define UNSUPPORTED_OPTION(opt, description) \ 63 do { \ 64 if (opt) { \ 65 if (FLAG_IS_CMDLINE(opt)) { \ 66 warning(description " is disabled in this release."); \ 67 } \ 68 FLAG_SET_DEFAULT(opt, false); \ 69 } \ 70 } while(0) 71 72 #define UNSUPPORTED_GC_OPTION(gc) \ 73 do { \ 74 if (gc) { \ 75 if (FLAG_IS_CMDLINE(gc)) { \ 76 warning(#gc " is not supported in this VM. Using Serial GC."); \ 77 } \ 78 FLAG_SET_DEFAULT(gc, false); \ 79 } \ 80 } while(0) 81 82 char** Arguments::_jvm_flags_array = NULL; 83 int Arguments::_num_jvm_flags = 0; 84 char** Arguments::_jvm_args_array = NULL; 85 int Arguments::_num_jvm_args = 0; 86 char* Arguments::_java_command = NULL; 87 SystemProperty* Arguments::_system_properties = NULL; 88 const char* Arguments::_gc_log_filename = NULL; 89 bool Arguments::_has_profile = false; 90 size_t Arguments::_conservative_max_heap_alignment = 0; 91 uintx Arguments::_min_heap_size = 0; 92 uintx Arguments::_min_heap_free_ratio = 0; 93 uintx Arguments::_max_heap_free_ratio = 0; 94 Arguments::Mode Arguments::_mode = _mixed; 95 bool Arguments::_java_compiler = false; 96 bool Arguments::_xdebug_mode = false; 97 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; 98 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; 99 int Arguments::_sun_java_launcher_pid = -1; 100 bool Arguments::_sun_java_launcher_is_altjvm = false; 101 102 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) 103 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 104 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; 105 bool Arguments::_BackgroundCompilation = BackgroundCompilation; 106 bool Arguments::_ClipInlining = ClipInlining; 107 108 char* Arguments::SharedArchivePath = NULL; 109 110 AgentLibraryList Arguments::_libraryList; 111 AgentLibraryList Arguments::_agentList; 112 113 abort_hook_t Arguments::_abort_hook = NULL; 114 exit_hook_t Arguments::_exit_hook = NULL; 115 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; 116 117 118 SystemProperty *Arguments::_java_ext_dirs = NULL; 119 SystemProperty *Arguments::_java_endorsed_dirs = NULL; 120 SystemProperty *Arguments::_sun_boot_library_path = NULL; 121 SystemProperty *Arguments::_java_library_path = NULL; 122 SystemProperty *Arguments::_java_home = NULL; 123 SystemProperty *Arguments::_java_class_path = NULL; 124 SystemProperty *Arguments::_sun_boot_class_path = NULL; 125 126 char* Arguments::_meta_index_path = NULL; 127 char* Arguments::_meta_index_dir = NULL; 128 129 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string 130 131 static bool match_option(const JavaVMOption *option, const char* name, 132 const char** tail) { 133 int len = (int)strlen(name); 134 if (strncmp(option->optionString, name, len) == 0) { 135 *tail = option->optionString + len; 136 return true; 137 } else { 138 return false; 139 } 140 } 141 142 static void logOption(const char* opt) { 143 if (PrintVMOptions) { 144 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); 145 } 146 } 147 148 // Process java launcher properties. 149 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { 150 // See if sun.java.launcher, sun.java.launcher.is_altjvm or 151 // sun.java.launcher.pid is defined. 152 // Must do this before setting up other system properties, 153 // as some of them may depend on launcher type. 154 for (int index = 0; index < args->nOptions; index++) { 155 const JavaVMOption* option = args->options + index; 156 const char* tail; 157 158 if (match_option(option, "-Dsun.java.launcher=", &tail)) { 159 process_java_launcher_argument(tail, option->extraInfo); 160 continue; 161 } 162 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { 163 if (strcmp(tail, "true") == 0) { 164 _sun_java_launcher_is_altjvm = true; 165 } 166 continue; 167 } 168 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { 169 _sun_java_launcher_pid = atoi(tail); 170 continue; 171 } 172 } 173 } 174 175 // Initialize system properties key and value. 176 void Arguments::init_system_properties() { 177 178 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", 179 "Java Virtual Machine Specification", false)); 180 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); 181 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); 182 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); 183 184 // Following are JVMTI agent writable properties. 185 // Properties values are set to NULL and they are 186 // os specific they are initialized in os::init_system_properties_values(). 187 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); 188 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); 189 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); 190 _java_library_path = new SystemProperty("java.library.path", NULL, true); 191 _java_home = new SystemProperty("java.home", NULL, true); 192 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); 193 194 _java_class_path = new SystemProperty("java.class.path", "", true); 195 196 // Add to System Property list. 197 PropertyList_add(&_system_properties, _java_ext_dirs); 198 PropertyList_add(&_system_properties, _java_endorsed_dirs); 199 PropertyList_add(&_system_properties, _sun_boot_library_path); 200 PropertyList_add(&_system_properties, _java_library_path); 201 PropertyList_add(&_system_properties, _java_home); 202 PropertyList_add(&_system_properties, _java_class_path); 203 PropertyList_add(&_system_properties, _sun_boot_class_path); 204 205 // Set OS specific system properties values 206 os::init_system_properties_values(); 207 } 208 209 210 // Update/Initialize System properties after JDK version number is known 211 void Arguments::init_version_specific_system_properties() { 212 enum { bufsz = 16 }; 213 char buffer[bufsz]; 214 const char* spec_vendor = "Sun Microsystems Inc."; 215 uint32_t spec_version = 0; 216 217 spec_vendor = "Oracle Corporation"; 218 spec_version = JDK_Version::current().major_version(); 219 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version); 220 221 PropertyList_add(&_system_properties, 222 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); 223 PropertyList_add(&_system_properties, 224 new SystemProperty("java.vm.specification.version", buffer, false)); 225 PropertyList_add(&_system_properties, 226 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); 227 } 228 229 /** 230 * Provide a slightly more user-friendly way of eliminating -XX flags. 231 * When a flag is eliminated, it can be added to this list in order to 232 * continue accepting this flag on the command-line, while issuing a warning 233 * and ignoring the value. Once the JDK version reaches the 'accept_until' 234 * limit, we flatly refuse to admit the existence of the flag. This allows 235 * a flag to die correctly over JDK releases using HSX. 236 */ 237 typedef struct { 238 const char* name; 239 JDK_Version obsoleted_in; // when the flag went away 240 JDK_Version accept_until; // which version to start denying the existence 241 } ObsoleteFlag; 242 243 static ObsoleteFlag obsolete_jvm_flags[] = { 244 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 245 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 246 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 247 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 248 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 249 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 250 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 251 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 252 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 253 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 254 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 255 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 256 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, 257 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, 258 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, 259 { "DefaultInitialRAMFraction", 260 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, 261 { "UseDepthFirstScavengeOrder", 262 JDK_Version::jdk_update(6,22), JDK_Version::jdk(7) }, 263 { "HandlePromotionFailure", 264 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, 265 { "MaxLiveObjectEvacuationRatio", 266 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, 267 { "ForceSharedSpaces", JDK_Version::jdk_update(6,25), JDK_Version::jdk(8) }, 268 { "UseParallelOldGCCompacting", 269 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, 270 { "UseParallelDensePrefixUpdate", 271 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, 272 { "UseParallelOldGCDensePrefix", 273 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, 274 { "AllowTransitionalJSR292", JDK_Version::jdk(7), JDK_Version::jdk(8) }, 275 { "UseCompressedStrings", JDK_Version::jdk(7), JDK_Version::jdk(8) }, 276 { "CMSPermGenPrecleaningEnabled", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 277 { "CMSTriggerPermRatio", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 278 { "CMSInitiatingPermOccupancyFraction", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 279 { "AdaptivePermSizeWeight", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 280 { "PermGenPadding", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 281 { "PermMarkSweepDeadRatio", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 282 { "PermSize", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 283 { "MaxPermSize", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 284 { "MinPermHeapExpansion", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 285 { "MaxPermHeapExpansion", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 286 { "CMSRevisitStackSize", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 287 { "PrintRevisitStats", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 288 { "UseVectoredExceptions", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 289 { "UseSplitVerifier", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 290 { "UseISM", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 291 { "UsePermISM", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 292 { "UseMPSS", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 293 { "UseStringCache", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 294 { "UseOldInlining", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 295 { "SafepointPollOffset", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 296 #ifdef PRODUCT 297 { "DesiredMethodLimit", 298 JDK_Version::jdk_update(7, 2), JDK_Version::jdk(8) }, 299 #endif // PRODUCT 300 { "UseVMInterruptibleIO", JDK_Version::jdk(8), JDK_Version::jdk(9) }, 301 { "UseBoundThreads", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 302 { "DefaultThreadPriority", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 303 { "NoYieldsInMicrolock", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 304 { "BackEdgeThreshold", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 305 { "UseNewReflection", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 306 { "ReflectionWrapResolutionErrors",JDK_Version::jdk(9), JDK_Version::jdk(10) }, 307 { "VerifyReflectionBytecodes", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 308 { "AutoShutdownNMT", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 309 #ifndef ZERO 310 { "UseFastAccessorMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 311 { "UseFastEmptyMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) }, 312 #endif // ZERO 313 { NULL, JDK_Version(0), JDK_Version(0) } 314 }; 315 316 // Returns true if the flag is obsolete and fits into the range specified 317 // for being ignored. In the case that the flag is ignored, the 'version' 318 // value is filled in with the version number when the flag became 319 // obsolete so that that value can be displayed to the user. 320 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { 321 int i = 0; 322 assert(version != NULL, "Must provide a version buffer"); 323 while (obsolete_jvm_flags[i].name != NULL) { 324 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; 325 // <flag>=xxx form 326 // [-|+]<flag> form 327 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || 328 ((s[0] == '+' || s[0] == '-') && 329 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { 330 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { 331 *version = flag_status.obsoleted_in; 332 return true; 333 } 334 } 335 i++; 336 } 337 return false; 338 } 339 340 // Constructs the system class path (aka boot class path) from the following 341 // components, in order: 342 // 343 // prefix // from -Xbootclasspath/p:... 344 // endorsed // the expansion of -Djava.endorsed.dirs=... 345 // base // from os::get_system_properties() or -Xbootclasspath= 346 // suffix // from -Xbootclasspath/a:... 347 // 348 // java.endorsed.dirs is a list of directories; any jar or zip files in the 349 // directories are added to the sysclasspath just before the base. 350 // 351 // This could be AllStatic, but it isn't needed after argument processing is 352 // complete. 353 class SysClassPath: public StackObj { 354 public: 355 SysClassPath(const char* base); 356 ~SysClassPath(); 357 358 inline void set_base(const char* base); 359 inline void add_prefix(const char* prefix); 360 inline void add_suffix_to_prefix(const char* suffix); 361 inline void add_suffix(const char* suffix); 362 inline void reset_path(const char* base); 363 364 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs 365 // property. Must be called after all command-line arguments have been 366 // processed (in particular, -Djava.endorsed.dirs=...) and before calling 367 // combined_path(). 368 void expand_endorsed(); 369 370 inline const char* get_base() const { return _items[_scp_base]; } 371 inline const char* get_prefix() const { return _items[_scp_prefix]; } 372 inline const char* get_suffix() const { return _items[_scp_suffix]; } 373 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } 374 375 // Combine all the components into a single c-heap-allocated string; caller 376 // must free the string if/when no longer needed. 377 char* combined_path(); 378 379 private: 380 // Utility routines. 381 static char* add_to_path(const char* path, const char* str, bool prepend); 382 static char* add_jars_to_path(char* path, const char* directory); 383 384 inline void reset_item_at(int index); 385 386 // Array indices for the items that make up the sysclasspath. All except the 387 // base are allocated in the C heap and freed by this class. 388 enum { 389 _scp_prefix, // from -Xbootclasspath/p:... 390 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... 391 _scp_base, // the default sysclasspath 392 _scp_suffix, // from -Xbootclasspath/a:... 393 _scp_nitems // the number of items, must be last. 394 }; 395 396 const char* _items[_scp_nitems]; 397 DEBUG_ONLY(bool _expansion_done;) 398 }; 399 400 SysClassPath::SysClassPath(const char* base) { 401 memset(_items, 0, sizeof(_items)); 402 _items[_scp_base] = base; 403 DEBUG_ONLY(_expansion_done = false;) 404 } 405 406 SysClassPath::~SysClassPath() { 407 // Free everything except the base. 408 for (int i = 0; i < _scp_nitems; ++i) { 409 if (i != _scp_base) reset_item_at(i); 410 } 411 DEBUG_ONLY(_expansion_done = false;) 412 } 413 414 inline void SysClassPath::set_base(const char* base) { 415 _items[_scp_base] = base; 416 } 417 418 inline void SysClassPath::add_prefix(const char* prefix) { 419 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); 420 } 421 422 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { 423 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); 424 } 425 426 inline void SysClassPath::add_suffix(const char* suffix) { 427 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); 428 } 429 430 inline void SysClassPath::reset_item_at(int index) { 431 assert(index < _scp_nitems && index != _scp_base, "just checking"); 432 if (_items[index] != NULL) { 433 FREE_C_HEAP_ARRAY(char, _items[index], mtInternal); 434 _items[index] = NULL; 435 } 436 } 437 438 inline void SysClassPath::reset_path(const char* base) { 439 // Clear the prefix and suffix. 440 reset_item_at(_scp_prefix); 441 reset_item_at(_scp_suffix); 442 set_base(base); 443 } 444 445 //------------------------------------------------------------------------------ 446 447 void SysClassPath::expand_endorsed() { 448 assert(_items[_scp_endorsed] == NULL, "can only be called once."); 449 450 const char* path = Arguments::get_property("java.endorsed.dirs"); 451 if (path == NULL) { 452 path = Arguments::get_endorsed_dir(); 453 assert(path != NULL, "no default for java.endorsed.dirs"); 454 } 455 456 char* expanded_path = NULL; 457 const char separator = *os::path_separator(); 458 const char* const end = path + strlen(path); 459 while (path < end) { 460 const char* tmp_end = strchr(path, separator); 461 if (tmp_end == NULL) { 462 expanded_path = add_jars_to_path(expanded_path, path); 463 path = end; 464 } else { 465 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal); 466 memcpy(dirpath, path, tmp_end - path); 467 dirpath[tmp_end - path] = '\0'; 468 expanded_path = add_jars_to_path(expanded_path, dirpath); 469 FREE_C_HEAP_ARRAY(char, dirpath, mtInternal); 470 path = tmp_end + 1; 471 } 472 } 473 _items[_scp_endorsed] = expanded_path; 474 DEBUG_ONLY(_expansion_done = true;) 475 } 476 477 // Combine the bootclasspath elements, some of which may be null, into a single 478 // c-heap-allocated string. 479 char* SysClassPath::combined_path() { 480 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); 481 assert(_expansion_done, "must call expand_endorsed() first."); 482 483 size_t lengths[_scp_nitems]; 484 size_t total_len = 0; 485 486 const char separator = *os::path_separator(); 487 488 // Get the lengths. 489 int i; 490 for (i = 0; i < _scp_nitems; ++i) { 491 if (_items[i] != NULL) { 492 lengths[i] = strlen(_items[i]); 493 // Include space for the separator char (or a NULL for the last item). 494 total_len += lengths[i] + 1; 495 } 496 } 497 assert(total_len > 0, "empty sysclasspath not allowed"); 498 499 // Copy the _items to a single string. 500 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal); 501 char* cp_tmp = cp; 502 for (i = 0; i < _scp_nitems; ++i) { 503 if (_items[i] != NULL) { 504 memcpy(cp_tmp, _items[i], lengths[i]); 505 cp_tmp += lengths[i]; 506 *cp_tmp++ = separator; 507 } 508 } 509 *--cp_tmp = '\0'; // Replace the extra separator. 510 return cp; 511 } 512 513 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 514 char* 515 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { 516 char *cp; 517 518 assert(str != NULL, "just checking"); 519 if (path == NULL) { 520 size_t len = strlen(str) + 1; 521 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); 522 memcpy(cp, str, len); // copy the trailing null 523 } else { 524 const char separator = *os::path_separator(); 525 size_t old_len = strlen(path); 526 size_t str_len = strlen(str); 527 size_t len = old_len + str_len + 2; 528 529 if (prepend) { 530 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); 531 char* cp_tmp = cp; 532 memcpy(cp_tmp, str, str_len); 533 cp_tmp += str_len; 534 *cp_tmp = separator; 535 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null 536 FREE_C_HEAP_ARRAY(char, path, mtInternal); 537 } else { 538 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal); 539 char* cp_tmp = cp + old_len; 540 *cp_tmp = separator; 541 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null 542 } 543 } 544 return cp; 545 } 546 547 // Scan the directory and append any jar or zip files found to path. 548 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. 549 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { 550 DIR* dir = os::opendir(directory); 551 if (dir == NULL) return path; 552 553 char dir_sep[2] = { '\0', '\0' }; 554 size_t directory_len = strlen(directory); 555 const char fileSep = *os::file_separator(); 556 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; 557 558 /* Scan the directory for jars/zips, appending them to path. */ 559 struct dirent *entry; 560 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal); 561 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { 562 const char* name = entry->d_name; 563 const char* ext = name + strlen(name) - 4; 564 bool isJarOrZip = ext > name && 565 (os::file_name_strcmp(ext, ".jar") == 0 || 566 os::file_name_strcmp(ext, ".zip") == 0); 567 if (isJarOrZip) { 568 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal); 569 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); 570 path = add_to_path(path, jarpath, false); 571 FREE_C_HEAP_ARRAY(char, jarpath, mtInternal); 572 } 573 } 574 FREE_C_HEAP_ARRAY(char, dbuf, mtInternal); 575 os::closedir(dir); 576 return path; 577 } 578 579 // Parses a memory size specification string. 580 static bool atomull(const char *s, julong* result) { 581 julong n = 0; 582 int args_read = 0; 583 bool is_hex = false; 584 // Skip leading 0[xX] for hexadecimal 585 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) { 586 s += 2; 587 is_hex = true; 588 args_read = sscanf(s, JULONG_FORMAT_X, &n); 589 } else { 590 args_read = sscanf(s, JULONG_FORMAT, &n); 591 } 592 if (args_read != 1) { 593 return false; 594 } 595 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) { 596 s++; 597 } 598 // 4705540: illegal if more characters are found after the first non-digit 599 if (strlen(s) > 1) { 600 return false; 601 } 602 switch (*s) { 603 case 'T': case 't': 604 *result = n * G * K; 605 // Check for overflow. 606 if (*result/((julong)G * K) != n) return false; 607 return true; 608 case 'G': case 'g': 609 *result = n * G; 610 if (*result/G != n) return false; 611 return true; 612 case 'M': case 'm': 613 *result = n * M; 614 if (*result/M != n) return false; 615 return true; 616 case 'K': case 'k': 617 *result = n * K; 618 if (*result/K != n) return false; 619 return true; 620 case '\0': 621 *result = n; 622 return true; 623 default: 624 return false; 625 } 626 } 627 628 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { 629 if (size < min_size) return arg_too_small; 630 // Check that size will fit in a size_t (only relevant on 32-bit) 631 if (size > max_uintx) return arg_too_big; 632 return arg_in_range; 633 } 634 635 // Describe an argument out of range error 636 void Arguments::describe_range_error(ArgsRange errcode) { 637 switch(errcode) { 638 case arg_too_big: 639 jio_fprintf(defaultStream::error_stream(), 640 "The specified size exceeds the maximum " 641 "representable size.\n"); 642 break; 643 case arg_too_small: 644 case arg_unreadable: 645 case arg_in_range: 646 // do nothing for now 647 break; 648 default: 649 ShouldNotReachHere(); 650 } 651 } 652 653 static bool set_bool_flag(char* name, bool value, Flag::Flags origin) { 654 return CommandLineFlags::boolAtPut(name, &value, origin); 655 } 656 657 static bool set_fp_numeric_flag(char* name, char* value, Flag::Flags origin) { 658 double v; 659 if (sscanf(value, "%lf", &v) != 1) { 660 return false; 661 } 662 663 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { 664 return true; 665 } 666 return false; 667 } 668 669 static bool set_numeric_flag(char* name, char* value, Flag::Flags origin) { 670 julong v; 671 intx intx_v; 672 bool is_neg = false; 673 // Check the sign first since atomull() parses only unsigned values. 674 if (*value == '-') { 675 if (!CommandLineFlags::intxAt(name, &intx_v)) { 676 return false; 677 } 678 value++; 679 is_neg = true; 680 } 681 if (!atomull(value, &v)) { 682 return false; 683 } 684 intx_v = (intx) v; 685 if (is_neg) { 686 intx_v = -intx_v; 687 } 688 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { 689 return true; 690 } 691 uintx uintx_v = (uintx) v; 692 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { 693 return true; 694 } 695 uint64_t uint64_t_v = (uint64_t) v; 696 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) { 697 return true; 698 } 699 size_t size_t_v = (size_t) v; 700 if (!is_neg && CommandLineFlags::size_tAtPut(name, &size_t_v, origin)) { 701 return true; 702 } 703 return false; 704 } 705 706 static bool set_string_flag(char* name, const char* value, Flag::Flags origin) { 707 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; 708 // Contract: CommandLineFlags always returns a pointer that needs freeing. 709 FREE_C_HEAP_ARRAY(char, value, mtInternal); 710 return true; 711 } 712 713 static bool append_to_string_flag(char* name, const char* new_value, Flag::Flags origin) { 714 const char* old_value = ""; 715 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; 716 size_t old_len = old_value != NULL ? strlen(old_value) : 0; 717 size_t new_len = strlen(new_value); 718 const char* value; 719 char* free_this_too = NULL; 720 if (old_len == 0) { 721 value = new_value; 722 } else if (new_len == 0) { 723 value = old_value; 724 } else { 725 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal); 726 // each new setting adds another LINE to the switch: 727 sprintf(buf, "%s\n%s", old_value, new_value); 728 value = buf; 729 free_this_too = buf; 730 } 731 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); 732 // CommandLineFlags always returns a pointer that needs freeing. 733 FREE_C_HEAP_ARRAY(char, value, mtInternal); 734 if (free_this_too != NULL) { 735 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. 736 FREE_C_HEAP_ARRAY(char, free_this_too, mtInternal); 737 } 738 return true; 739 } 740 741 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) { 742 743 // range of acceptable characters spelled out for portability reasons 744 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" 745 #define BUFLEN 255 746 char name[BUFLEN+1]; 747 char dummy; 748 749 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 750 return set_bool_flag(name, false, origin); 751 } 752 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { 753 return set_bool_flag(name, true, origin); 754 } 755 756 char punct; 757 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { 758 const char* value = strchr(arg, '=') + 1; 759 Flag* flag = Flag::find_flag(name, strlen(name)); 760 if (flag != NULL && flag->is_ccstr()) { 761 if (flag->ccstr_accumulates()) { 762 return append_to_string_flag(name, value, origin); 763 } else { 764 if (value[0] == '\0') { 765 value = NULL; 766 } 767 return set_string_flag(name, value, origin); 768 } 769 } 770 } 771 772 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { 773 const char* value = strchr(arg, '=') + 1; 774 // -XX:Foo:=xxx will reset the string flag to the given value. 775 if (value[0] == '\0') { 776 value = NULL; 777 } 778 return set_string_flag(name, value, origin); 779 } 780 781 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" 782 #define SIGNED_NUMBER_RANGE "[-0123456789]" 783 #define NUMBER_RANGE "[0123456789]" 784 char value[BUFLEN + 1]; 785 char value2[BUFLEN + 1]; 786 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { 787 // Looks like a floating-point number -- try again with more lenient format string 788 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { 789 return set_fp_numeric_flag(name, value, origin); 790 } 791 } 792 793 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" 794 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { 795 return set_numeric_flag(name, value, origin); 796 } 797 798 return false; 799 } 800 801 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { 802 assert(bldarray != NULL, "illegal argument"); 803 804 if (arg == NULL) { 805 return; 806 } 807 808 int new_count = *count + 1; 809 810 // expand the array and add arg to the last element 811 if (*bldarray == NULL) { 812 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal); 813 } else { 814 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal); 815 } 816 (*bldarray)[*count] = os::strdup_check_oom(arg); 817 *count = new_count; 818 } 819 820 void Arguments::build_jvm_args(const char* arg) { 821 add_string(&_jvm_args_array, &_num_jvm_args, arg); 822 } 823 824 void Arguments::build_jvm_flags(const char* arg) { 825 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); 826 } 827 828 // utility function to return a string that concatenates all 829 // strings in a given char** array 830 const char* Arguments::build_resource_string(char** args, int count) { 831 if (args == NULL || count == 0) { 832 return NULL; 833 } 834 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator 835 for (int i = 1; i < count; i++) { 836 length += strlen(args[i]) + 1; // add 1 for a space 837 } 838 char* s = NEW_RESOURCE_ARRAY(char, length); 839 strcpy(s, args[0]); 840 for (int j = 1; j < count; j++) { 841 strcat(s, " "); 842 strcat(s, args[j]); 843 } 844 return (const char*) s; 845 } 846 847 void Arguments::print_on(outputStream* st) { 848 st->print_cr("VM Arguments:"); 849 if (num_jvm_flags() > 0) { 850 st->print("jvm_flags: "); print_jvm_flags_on(st); 851 } 852 if (num_jvm_args() > 0) { 853 st->print("jvm_args: "); print_jvm_args_on(st); 854 } 855 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); 856 if (_java_class_path != NULL) { 857 char* path = _java_class_path->value(); 858 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); 859 } 860 st->print_cr("Launcher Type: %s", _sun_java_launcher); 861 } 862 863 void Arguments::print_jvm_flags_on(outputStream* st) { 864 if (_num_jvm_flags > 0) { 865 for (int i=0; i < _num_jvm_flags; i++) { 866 st->print("%s ", _jvm_flags_array[i]); 867 } 868 st->cr(); 869 } 870 } 871 872 void Arguments::print_jvm_args_on(outputStream* st) { 873 if (_num_jvm_args > 0) { 874 for (int i=0; i < _num_jvm_args; i++) { 875 st->print("%s ", _jvm_args_array[i]); 876 } 877 st->cr(); 878 } 879 } 880 881 bool Arguments::process_argument(const char* arg, 882 jboolean ignore_unrecognized, Flag::Flags origin) { 883 884 JDK_Version since = JDK_Version(); 885 886 if (parse_argument(arg, origin) || ignore_unrecognized) { 887 return true; 888 } 889 890 bool has_plus_minus = (*arg == '+' || *arg == '-'); 891 const char* const argname = has_plus_minus ? arg + 1 : arg; 892 if (is_newly_obsolete(arg, &since)) { 893 char version[256]; 894 since.to_string(version, sizeof(version)); 895 warning("ignoring option %s; support was removed in %s", argname, version); 896 return true; 897 } 898 899 // For locked flags, report a custom error message if available. 900 // Otherwise, report the standard unrecognized VM option. 901 902 size_t arg_len; 903 const char* equal_sign = strchr(argname, '='); 904 if (equal_sign == NULL) { 905 arg_len = strlen(argname); 906 } else { 907 arg_len = equal_sign - argname; 908 } 909 910 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true); 911 if (found_flag != NULL) { 912 char locked_message_buf[BUFLEN]; 913 found_flag->get_locked_message(locked_message_buf, BUFLEN); 914 if (strlen(locked_message_buf) == 0) { 915 if (found_flag->is_bool() && !has_plus_minus) { 916 jio_fprintf(defaultStream::error_stream(), 917 "Missing +/- setting for VM option '%s'\n", argname); 918 } else if (!found_flag->is_bool() && has_plus_minus) { 919 jio_fprintf(defaultStream::error_stream(), 920 "Unexpected +/- setting in VM option '%s'\n", argname); 921 } else { 922 jio_fprintf(defaultStream::error_stream(), 923 "Improperly specified VM option '%s'\n", argname); 924 } 925 } else { 926 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); 927 } 928 } else { 929 jio_fprintf(defaultStream::error_stream(), 930 "Unrecognized VM option '%s'\n", argname); 931 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true); 932 if (fuzzy_matched != NULL) { 933 jio_fprintf(defaultStream::error_stream(), 934 "Did you mean '%s%s%s'?\n", 935 (fuzzy_matched->is_bool()) ? "(+/-)" : "", 936 fuzzy_matched->_name, 937 (fuzzy_matched->is_bool()) ? "" : "=<value>"); 938 } 939 } 940 941 // allow for commandline "commenting out" options like -XX:#+Verbose 942 return arg[0] == '#'; 943 } 944 945 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { 946 FILE* stream = fopen(file_name, "rb"); 947 if (stream == NULL) { 948 if (should_exist) { 949 jio_fprintf(defaultStream::error_stream(), 950 "Could not open settings file %s\n", file_name); 951 return false; 952 } else { 953 return true; 954 } 955 } 956 957 char token[1024]; 958 int pos = 0; 959 960 bool in_white_space = true; 961 bool in_comment = false; 962 bool in_quote = false; 963 char quote_c = 0; 964 bool result = true; 965 966 int c = getc(stream); 967 while(c != EOF && pos < (int)(sizeof(token)-1)) { 968 if (in_white_space) { 969 if (in_comment) { 970 if (c == '\n') in_comment = false; 971 } else { 972 if (c == '#') in_comment = true; 973 else if (!isspace(c)) { 974 in_white_space = false; 975 token[pos++] = c; 976 } 977 } 978 } else { 979 if (c == '\n' || (!in_quote && isspace(c))) { 980 // token ends at newline, or at unquoted whitespace 981 // this allows a way to include spaces in string-valued options 982 token[pos] = '\0'; 983 logOption(token); 984 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 985 build_jvm_flags(token); 986 pos = 0; 987 in_white_space = true; 988 in_quote = false; 989 } else if (!in_quote && (c == '\'' || c == '"')) { 990 in_quote = true; 991 quote_c = c; 992 } else if (in_quote && (c == quote_c)) { 993 in_quote = false; 994 } else { 995 token[pos++] = c; 996 } 997 } 998 c = getc(stream); 999 } 1000 if (pos > 0) { 1001 token[pos] = '\0'; 1002 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE); 1003 build_jvm_flags(token); 1004 } 1005 fclose(stream); 1006 return result; 1007 } 1008 1009 //============================================================================================================= 1010 // Parsing of properties (-D) 1011 1012 const char* Arguments::get_property(const char* key) { 1013 return PropertyList_get_value(system_properties(), key); 1014 } 1015 1016 bool Arguments::add_property(const char* prop) { 1017 const char* eq = strchr(prop, '='); 1018 char* key; 1019 // ns must be static--its address may be stored in a SystemProperty object. 1020 const static char ns[1] = {0}; 1021 char* value = (char *)ns; 1022 1023 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); 1024 key = AllocateHeap(key_len + 1, mtInternal); 1025 strncpy(key, prop, key_len); 1026 key[key_len] = '\0'; 1027 1028 if (eq != NULL) { 1029 size_t value_len = strlen(prop) - key_len - 1; 1030 value = AllocateHeap(value_len + 1, mtInternal); 1031 strncpy(value, &prop[key_len + 1], value_len + 1); 1032 } 1033 1034 if (strcmp(key, "java.compiler") == 0) { 1035 process_java_compiler_argument(value); 1036 FreeHeap(key); 1037 if (eq != NULL) { 1038 FreeHeap(value); 1039 } 1040 return true; 1041 } else if (strcmp(key, "sun.java.command") == 0) { 1042 _java_command = value; 1043 1044 // Record value in Arguments, but let it get passed to Java. 1045 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || 1046 strcmp(key, "sun.java.launcher.pid") == 0) { 1047 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are 1048 // private and are processed in process_sun_java_launcher_properties(); 1049 // the sun.java.launcher property is passed on to the java application 1050 FreeHeap(key); 1051 if (eq != NULL) { 1052 FreeHeap(value); 1053 } 1054 return true; 1055 } else if (strcmp(key, "java.vendor.url.bug") == 0) { 1056 // save it in _java_vendor_url_bug, so JVM fatal error handler can access 1057 // its value without going through the property list or making a Java call. 1058 _java_vendor_url_bug = value; 1059 } else if (strcmp(key, "sun.boot.library.path") == 0) { 1060 PropertyList_unique_add(&_system_properties, key, value, true); 1061 return true; 1062 } 1063 // Create new property and add at the end of the list 1064 PropertyList_unique_add(&_system_properties, key, value); 1065 return true; 1066 } 1067 1068 //=========================================================================================================== 1069 // Setting int/mixed/comp mode flags 1070 1071 void Arguments::set_mode_flags(Mode mode) { 1072 // Set up default values for all flags. 1073 // If you add a flag to any of the branches below, 1074 // add a default value for it here. 1075 set_java_compiler(false); 1076 _mode = mode; 1077 1078 // Ensure Agent_OnLoad has the correct initial values. 1079 // This may not be the final mode; mode may change later in onload phase. 1080 PropertyList_unique_add(&_system_properties, "java.vm.info", 1081 (char*)VM_Version::vm_info_string(), false); 1082 1083 UseInterpreter = true; 1084 UseCompiler = true; 1085 UseLoopCounter = true; 1086 1087 // Default values may be platform/compiler dependent - 1088 // use the saved values 1089 ClipInlining = Arguments::_ClipInlining; 1090 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; 1091 UseOnStackReplacement = Arguments::_UseOnStackReplacement; 1092 BackgroundCompilation = Arguments::_BackgroundCompilation; 1093 1094 // Change from defaults based on mode 1095 switch (mode) { 1096 default: 1097 ShouldNotReachHere(); 1098 break; 1099 case _int: 1100 UseCompiler = false; 1101 UseLoopCounter = false; 1102 AlwaysCompileLoopMethods = false; 1103 UseOnStackReplacement = false; 1104 break; 1105 case _mixed: 1106 // same as default 1107 break; 1108 case _comp: 1109 UseInterpreter = false; 1110 BackgroundCompilation = false; 1111 ClipInlining = false; 1112 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. 1113 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and 1114 // compile a level 4 (C2) and then continue executing it. 1115 if (TieredCompilation) { 1116 Tier3InvokeNotifyFreqLog = 0; 1117 Tier4InvocationThreshold = 0; 1118 } 1119 break; 1120 } 1121 } 1122 1123 #if defined(COMPILER2) || defined(_LP64) || !INCLUDE_CDS 1124 // Conflict: required to use shared spaces (-Xshare:on), but 1125 // incompatible command line options were chosen. 1126 1127 static void no_shared_spaces(const char* message) { 1128 if (RequireSharedSpaces) { 1129 jio_fprintf(defaultStream::error_stream(), 1130 "Class data sharing is inconsistent with other specified options.\n"); 1131 vm_exit_during_initialization("Unable to use shared archive.", message); 1132 } else { 1133 FLAG_SET_DEFAULT(UseSharedSpaces, false); 1134 } 1135 } 1136 #endif 1137 1138 // Returns threshold scaled with CompileThresholdScaling 1139 intx Arguments::get_scaled_compile_threshold(intx threshold) { 1140 return (intx)(threshold * CompileThresholdScaling); 1141 } 1142 1143 // Returns freq_log scaled with CompileThresholdScaling 1144 intx Arguments::get_scaled_freq_log(intx freq_log) { 1145 intx scaled_freq = get_scaled_compile_threshold((intx)1 << freq_log); 1146 if (scaled_freq == 0) { 1147 return 0; 1148 } else { 1149 return log2_intptr(scaled_freq); 1150 } 1151 } 1152 1153 void Arguments::set_tiered_flags() { 1154 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. 1155 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { 1156 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); 1157 } 1158 if (CompilationPolicyChoice < 2) { 1159 vm_exit_during_initialization( 1160 "Incompatible compilation policy selected", NULL); 1161 } 1162 // Increase the code cache size - tiered compiles a lot more. 1163 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1164 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize, ReservedCodeCacheSize * 5); 1165 } 1166 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M 1167 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { 1168 FLAG_SET_ERGO(bool, SegmentedCodeCache, true); 1169 1170 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1171 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap) 1172 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) { 1173 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1174 } 1175 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) { 1176 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1177 } 1178 // Check consistency of code heap sizes 1179 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 1180 jio_fprintf(defaultStream::error_stream(), 1181 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 1182 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 1183 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 1184 vm_exit(1); 1185 } 1186 } 1187 } 1188 if (!UseInterpreter) { // -Xcomp 1189 Tier3InvokeNotifyFreqLog = 0; 1190 Tier4InvocationThreshold = 0; 1191 } 1192 // Scale tiered compilation thresholds 1193 if (!FLAG_IS_DEFAULT(CompileThresholdScaling)) { 1194 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, get_scaled_freq_log(Tier0InvokeNotifyFreqLog)); 1195 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, get_scaled_freq_log(Tier0BackedgeNotifyFreqLog)); 1196 1197 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, get_scaled_compile_threshold(Tier3InvocationThreshold)); 1198 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, get_scaled_compile_threshold(Tier3MinInvocationThreshold)); 1199 FLAG_SET_ERGO(intx, Tier3CompileThreshold, get_scaled_compile_threshold(Tier3CompileThreshold)); 1200 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, get_scaled_compile_threshold(Tier3BackEdgeThreshold)); 1201 1202 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here 1203 // once these thresholds become supported. 1204 1205 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, get_scaled_freq_log(Tier2InvokeNotifyFreqLog)); 1206 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, get_scaled_freq_log(Tier2BackedgeNotifyFreqLog)); 1207 1208 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, get_scaled_freq_log(Tier3InvokeNotifyFreqLog)); 1209 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, get_scaled_freq_log(Tier3BackedgeNotifyFreqLog)); 1210 1211 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, get_scaled_freq_log(Tier23InlineeNotifyFreqLog)); 1212 1213 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, get_scaled_compile_threshold(Tier4InvocationThreshold)); 1214 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, get_scaled_compile_threshold(Tier4MinInvocationThreshold)); 1215 FLAG_SET_ERGO(intx, Tier4CompileThreshold, get_scaled_compile_threshold(Tier4CompileThreshold)); 1216 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, get_scaled_compile_threshold(Tier4BackEdgeThreshold)); 1217 } 1218 } 1219 1220 /** 1221 * Returns the minimum number of compiler threads needed to run the JVM. The following 1222 * configurations are possible. 1223 * 1224 * 1) The JVM is build using an interpreter only. As a result, the minimum number of 1225 * compiler threads is 0. 1226 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As 1227 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1. 1228 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However, 1229 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only 1230 * C1 can be used, so the minimum number of compiler threads is 1. 1231 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option 1232 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result, 1233 * the minimum number of compiler threads is 2. 1234 */ 1235 int Arguments::get_min_number_of_compiler_threads() { 1236 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 1237 return 0; // case 1 1238 #else 1239 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) { 1240 return 1; // case 2 or case 3 1241 } 1242 return 2; // case 4 (tiered) 1243 #endif 1244 } 1245 1246 #if INCLUDE_ALL_GCS 1247 static void disable_adaptive_size_policy(const char* collector_name) { 1248 if (UseAdaptiveSizePolicy) { 1249 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) { 1250 warning("disabling UseAdaptiveSizePolicy; it is incompatible with %s.", 1251 collector_name); 1252 } 1253 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 1254 } 1255 } 1256 1257 void Arguments::set_parnew_gc_flags() { 1258 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, 1259 "control point invariant"); 1260 assert(UseParNewGC, "Error"); 1261 1262 // Turn off AdaptiveSizePolicy for parnew until it is complete. 1263 disable_adaptive_size_policy("UseParNewGC"); 1264 1265 if (FLAG_IS_DEFAULT(ParallelGCThreads)) { 1266 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1267 assert(ParallelGCThreads > 0, "We should always have at least one thread by default"); 1268 } else if (ParallelGCThreads == 0) { 1269 jio_fprintf(defaultStream::error_stream(), 1270 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n"); 1271 vm_exit(1); 1272 } 1273 1274 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, 1275 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 1276 // we set them to 1024 and 1024. 1277 // See CR 6362902. 1278 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 1279 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 1280 } 1281 if (FLAG_IS_DEFAULT(OldPLABSize)) { 1282 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 1283 } 1284 1285 // When using compressed oops, we use local overflow stacks, 1286 // rather than using a global overflow list chained through 1287 // the klass word of the object's pre-image. 1288 if (UseCompressedOops && !ParGCUseLocalOverflow) { 1289 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { 1290 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); 1291 } 1292 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); 1293 } 1294 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); 1295 } 1296 1297 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on 1298 // sparc/solaris for certain applications, but would gain from 1299 // further optimization and tuning efforts, and would almost 1300 // certainly gain from analysis of platform and environment. 1301 void Arguments::set_cms_and_parnew_gc_flags() { 1302 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); 1303 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1304 1305 // If we are using CMS, we prefer to UseParNewGC, 1306 // unless explicitly forbidden. 1307 if (FLAG_IS_DEFAULT(UseParNewGC)) { 1308 FLAG_SET_ERGO(bool, UseParNewGC, true); 1309 } 1310 1311 // Turn off AdaptiveSizePolicy by default for cms until it is complete. 1312 disable_adaptive_size_policy("UseConcMarkSweepGC"); 1313 1314 // In either case, adjust ParallelGCThreads and/or UseParNewGC 1315 // as needed. 1316 if (UseParNewGC) { 1317 set_parnew_gc_flags(); 1318 } 1319 1320 size_t max_heap = align_size_down(MaxHeapSize, 1321 CardTableRS::ct_max_alignment_constraint()); 1322 1323 // Now make adjustments for CMS 1324 intx tenuring_default = (intx)6; 1325 size_t young_gen_per_worker = CMSYoungGenPerWorker; 1326 1327 // Preferred young gen size for "short" pauses: 1328 // upper bound depends on # of threads and NewRatio. 1329 const uintx parallel_gc_threads = 1330 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); 1331 const size_t preferred_max_new_size_unaligned = 1332 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * parallel_gc_threads)); 1333 size_t preferred_max_new_size = 1334 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1335 1336 // Unless explicitly requested otherwise, size young gen 1337 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads 1338 1339 // If either MaxNewSize or NewRatio is set on the command line, 1340 // assume the user is trying to set the size of the young gen. 1341 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { 1342 1343 // Set MaxNewSize to our calculated preferred_max_new_size unless 1344 // NewSize was set on the command line and it is larger than 1345 // preferred_max_new_size. 1346 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1347 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1348 } else { 1349 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); 1350 } 1351 if (PrintGCDetails && Verbose) { 1352 // Too early to use gclog_or_tty 1353 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1354 } 1355 1356 // Code along this path potentially sets NewSize and OldSize 1357 if (PrintGCDetails && Verbose) { 1358 // Too early to use gclog_or_tty 1359 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT 1360 " initial_heap_size: " SIZE_FORMAT 1361 " max_heap: " SIZE_FORMAT, 1362 min_heap_size(), InitialHeapSize, max_heap); 1363 } 1364 size_t min_new = preferred_max_new_size; 1365 if (FLAG_IS_CMDLINE(NewSize)) { 1366 min_new = NewSize; 1367 } 1368 if (max_heap > min_new && min_heap_size() > min_new) { 1369 // Unless explicitly requested otherwise, make young gen 1370 // at least min_new, and at most preferred_max_new_size. 1371 if (FLAG_IS_DEFAULT(NewSize)) { 1372 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); 1373 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); 1374 if (PrintGCDetails && Verbose) { 1375 // Too early to use gclog_or_tty 1376 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize); 1377 } 1378 } 1379 // Unless explicitly requested otherwise, size old gen 1380 // so it's NewRatio x of NewSize. 1381 if (FLAG_IS_DEFAULT(OldSize)) { 1382 if (max_heap > NewSize) { 1383 FLAG_SET_ERGO(uintx, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize)); 1384 if (PrintGCDetails && Verbose) { 1385 // Too early to use gclog_or_tty 1386 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize); 1387 } 1388 } 1389 } 1390 } 1391 } 1392 // Unless explicitly requested otherwise, definitely 1393 // promote all objects surviving "tenuring_default" scavenges. 1394 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1395 FLAG_IS_DEFAULT(SurvivorRatio)) { 1396 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default); 1397 } 1398 // If we decided above (or user explicitly requested) 1399 // `promote all' (via MaxTenuringThreshold := 0), 1400 // prefer minuscule survivor spaces so as not to waste 1401 // space for (non-existent) survivors 1402 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1403 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio)); 1404 } 1405 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, 1406 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. 1407 // This is done in order to make ParNew+CMS configuration to work 1408 // with YoungPLABSize and OldPLABSize options. 1409 // See CR 6362902. 1410 if (!FLAG_IS_DEFAULT(OldPLABSize)) { 1411 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1412 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim 1413 // is. In this situation let CMSParPromoteBlocksToClaim follow 1414 // the value (either from the command line or ergonomics) of 1415 // OldPLABSize. Following OldPLABSize is an ergonomics decision. 1416 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); 1417 } else { 1418 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. 1419 // CMSParPromoteBlocksToClaim is a collector-specific flag, so 1420 // we'll let it to take precedence. 1421 jio_fprintf(defaultStream::error_stream(), 1422 "Both OldPLABSize and CMSParPromoteBlocksToClaim" 1423 " options are specified for the CMS collector." 1424 " CMSParPromoteBlocksToClaim will take precedence.\n"); 1425 } 1426 } 1427 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { 1428 // OldPLAB sizing manually turned off: Use a larger default setting, 1429 // unless it was manually specified. This is because a too-low value 1430 // will slow down scavenges. 1431 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1432 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 1433 } 1434 } 1435 // Overwrite OldPLABSize which is the variable we will internally use everywhere. 1436 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); 1437 // If either of the static initialization defaults have changed, note this 1438 // modification. 1439 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { 1440 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); 1441 } 1442 if (PrintGCDetails && Verbose) { 1443 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1444 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1445 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads); 1446 } 1447 } 1448 #endif // INCLUDE_ALL_GCS 1449 1450 void set_object_alignment() { 1451 // Object alignment. 1452 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1453 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1454 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1455 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1456 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1457 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1458 1459 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1460 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1461 1462 // Oop encoding heap max 1463 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1464 1465 #if INCLUDE_ALL_GCS 1466 // Set CMS global values 1467 CompactibleFreeListSpace::set_cms_values(); 1468 #endif // INCLUDE_ALL_GCS 1469 } 1470 1471 bool verify_object_alignment() { 1472 // Object alignment. 1473 if (!is_power_of_2(ObjectAlignmentInBytes)) { 1474 jio_fprintf(defaultStream::error_stream(), 1475 "error: ObjectAlignmentInBytes=%d must be power of 2\n", 1476 (int)ObjectAlignmentInBytes); 1477 return false; 1478 } 1479 if ((int)ObjectAlignmentInBytes < BytesPerLong) { 1480 jio_fprintf(defaultStream::error_stream(), 1481 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n", 1482 (int)ObjectAlignmentInBytes, BytesPerLong); 1483 return false; 1484 } 1485 // It does not make sense to have big object alignment 1486 // since a space lost due to alignment will be greater 1487 // then a saved space from compressed oops. 1488 if ((int)ObjectAlignmentInBytes > 256) { 1489 jio_fprintf(defaultStream::error_stream(), 1490 "error: ObjectAlignmentInBytes=%d must not be greater than 256\n", 1491 (int)ObjectAlignmentInBytes); 1492 return false; 1493 } 1494 // In case page size is very small. 1495 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) { 1496 jio_fprintf(defaultStream::error_stream(), 1497 "error: ObjectAlignmentInBytes=%d must be less than page size %d\n", 1498 (int)ObjectAlignmentInBytes, os::vm_page_size()); 1499 return false; 1500 } 1501 if(SurvivorAlignmentInBytes == 0) { 1502 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1503 } else { 1504 if (!is_power_of_2(SurvivorAlignmentInBytes)) { 1505 jio_fprintf(defaultStream::error_stream(), 1506 "error: SurvivorAlignmentInBytes=%d must be power of 2\n", 1507 (int)SurvivorAlignmentInBytes); 1508 return false; 1509 } 1510 if (SurvivorAlignmentInBytes < ObjectAlignmentInBytes) { 1511 jio_fprintf(defaultStream::error_stream(), 1512 "error: SurvivorAlignmentInBytes=%d must be greater than ObjectAlignmentInBytes=%d \n", 1513 (int)SurvivorAlignmentInBytes, (int)ObjectAlignmentInBytes); 1514 return false; 1515 } 1516 } 1517 return true; 1518 } 1519 1520 size_t Arguments::max_heap_for_compressed_oops() { 1521 // Avoid sign flip. 1522 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1523 // We need to fit both the NULL page and the heap into the memory budget, while 1524 // keeping alignment constraints of the heap. To guarantee the latter, as the 1525 // NULL page is located before the heap, we pad the NULL page to the conservative 1526 // maximum alignment that the GC may ever impose upon the heap. 1527 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(), 1528 _conservative_max_heap_alignment); 1529 1530 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1531 NOT_LP64(ShouldNotReachHere(); return 0); 1532 } 1533 1534 bool Arguments::should_auto_select_low_pause_collector() { 1535 if (UseAutoGCSelectPolicy && 1536 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1537 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1538 if (PrintGCDetails) { 1539 // Cannot use gclog_or_tty yet. 1540 tty->print_cr("Automatic selection of the low pause collector" 1541 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis); 1542 } 1543 return true; 1544 } 1545 return false; 1546 } 1547 1548 void Arguments::set_use_compressed_oops() { 1549 #ifndef ZERO 1550 #ifdef _LP64 1551 // MaxHeapSize is not set up properly at this point, but 1552 // the only value that can override MaxHeapSize if we are 1553 // to use UseCompressedOops is InitialHeapSize. 1554 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1555 1556 if (max_heap_size <= max_heap_for_compressed_oops()) { 1557 #if !defined(COMPILER1) || defined(TIERED) 1558 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1559 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1560 } 1561 #endif 1562 #ifdef _WIN64 1563 if (UseLargePages && UseCompressedOops) { 1564 // Cannot allocate guard pages for implicit checks in indexed addressing 1565 // mode, when large pages are specified on windows. 1566 // This flag could be switched ON if narrow oop base address is set to 0, 1567 // see code in Universe::initialize_heap(). 1568 Universe::set_narrow_oop_use_implicit_null_checks(false); 1569 } 1570 #endif // _WIN64 1571 } else { 1572 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1573 warning("Max heap size too large for Compressed Oops"); 1574 FLAG_SET_DEFAULT(UseCompressedOops, false); 1575 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1576 } 1577 } 1578 #endif // _LP64 1579 #endif // ZERO 1580 } 1581 1582 1583 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1584 // set_use_compressed_oops(). 1585 void Arguments::set_use_compressed_klass_ptrs() { 1586 #ifndef ZERO 1587 #ifdef _LP64 1588 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1589 if (!UseCompressedOops) { 1590 if (UseCompressedClassPointers) { 1591 warning("UseCompressedClassPointers requires UseCompressedOops"); 1592 } 1593 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1594 } else { 1595 // Turn on UseCompressedClassPointers too 1596 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1597 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1598 } 1599 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1600 if (UseCompressedClassPointers) { 1601 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1602 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1603 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1604 } 1605 } 1606 } 1607 #endif // _LP64 1608 #endif // !ZERO 1609 } 1610 1611 void Arguments::set_conservative_max_heap_alignment() { 1612 // The conservative maximum required alignment for the heap is the maximum of 1613 // the alignments imposed by several sources: any requirements from the heap 1614 // itself, the collector policy and the maximum page size we may run the VM 1615 // with. 1616 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment(); 1617 #if INCLUDE_ALL_GCS 1618 if (UseParallelGC) { 1619 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment(); 1620 } else if (UseG1GC) { 1621 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment(); 1622 } 1623 #endif // INCLUDE_ALL_GCS 1624 _conservative_max_heap_alignment = MAX4(heap_alignment, 1625 (size_t)os::vm_allocation_granularity(), 1626 os::max_page_size(), 1627 CollectorPolicy::compute_heap_alignment()); 1628 } 1629 1630 void Arguments::select_gc_ergonomically() { 1631 if (os::is_server_class_machine()) { 1632 if (should_auto_select_low_pause_collector()) { 1633 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1634 } else { 1635 FLAG_SET_ERGO(bool, UseParallelGC, true); 1636 } 1637 } 1638 } 1639 1640 void Arguments::select_gc() { 1641 if (!gc_selected()) { 1642 ArgumentsExt::select_gc_ergonomically(); 1643 } 1644 } 1645 1646 void Arguments::set_ergonomics_flags() { 1647 select_gc(); 1648 1649 #ifdef COMPILER2 1650 // Shared spaces work fine with other GCs but causes bytecode rewriting 1651 // to be disabled, which hurts interpreter performance and decreases 1652 // server performance. When -server is specified, keep the default off 1653 // unless it is asked for. Future work: either add bytecode rewriting 1654 // at link time, or rewrite bytecodes in non-shared methods. 1655 if (!DumpSharedSpaces && !RequireSharedSpaces && 1656 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { 1657 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); 1658 } 1659 #endif 1660 1661 set_conservative_max_heap_alignment(); 1662 1663 #ifndef ZERO 1664 #ifdef _LP64 1665 set_use_compressed_oops(); 1666 1667 // set_use_compressed_klass_ptrs() must be called after calling 1668 // set_use_compressed_oops(). 1669 set_use_compressed_klass_ptrs(); 1670 1671 // Also checks that certain machines are slower with compressed oops 1672 // in vm_version initialization code. 1673 #endif // _LP64 1674 #endif // !ZERO 1675 } 1676 1677 void Arguments::set_parallel_gc_flags() { 1678 assert(UseParallelGC || UseParallelOldGC, "Error"); 1679 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file). 1680 if (FLAG_IS_DEFAULT(UseParallelOldGC)) { 1681 FLAG_SET_DEFAULT(UseParallelOldGC, true); 1682 } 1683 FLAG_SET_DEFAULT(UseParallelGC, true); 1684 1685 // If no heap maximum was requested explicitly, use some reasonable fraction 1686 // of the physical memory, up to a maximum of 1GB. 1687 FLAG_SET_DEFAULT(ParallelGCThreads, 1688 Abstract_VM_Version::parallel_worker_threads()); 1689 if (ParallelGCThreads == 0) { 1690 jio_fprintf(defaultStream::error_stream(), 1691 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n"); 1692 vm_exit(1); 1693 } 1694 1695 if (UseAdaptiveSizePolicy) { 1696 // We don't want to limit adaptive heap sizing's freedom to adjust the heap 1697 // unless the user actually sets these flags. 1698 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) { 1699 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0); 1700 _min_heap_free_ratio = MinHeapFreeRatio; 1701 } 1702 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) { 1703 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100); 1704 _max_heap_free_ratio = MaxHeapFreeRatio; 1705 } 1706 } 1707 1708 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1709 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1710 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1711 // See CR 6362902 for details. 1712 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1713 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1714 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1715 } 1716 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1717 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1718 } 1719 } 1720 1721 if (UseParallelOldGC) { 1722 // Par compact uses lower default values since they are treated as 1723 // minimums. These are different defaults because of the different 1724 // interpretation and are not ergonomically set. 1725 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1726 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1727 } 1728 } 1729 } 1730 1731 void Arguments::set_g1_gc_flags() { 1732 assert(UseG1GC, "Error"); 1733 #ifdef COMPILER1 1734 FastTLABRefill = false; 1735 #endif 1736 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1737 if (ParallelGCThreads == 0) { 1738 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0."); 1739 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL); 1740 } 1741 1742 #if INCLUDE_ALL_GCS 1743 if (G1ConcRefinementThreads == 0) { 1744 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads); 1745 } 1746 #endif 1747 1748 // MarkStackSize will be set (if it hasn't been set by the user) 1749 // when concurrent marking is initialized. 1750 // Its value will be based upon the number of parallel marking threads. 1751 // But we do set the maximum mark stack size here. 1752 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) { 1753 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE); 1754 } 1755 1756 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { 1757 // In G1, we want the default GC overhead goal to be higher than 1758 // say in PS. So we set it here to 10%. Otherwise the heap might 1759 // be expanded more aggressively than we would like it to. In 1760 // fact, even 10% seems to not be high enough in some cases 1761 // (especially small GC stress tests that the main thing they do 1762 // is allocation). We might consider increase it further. 1763 FLAG_SET_DEFAULT(GCTimeRatio, 9); 1764 } 1765 1766 if (PrintGCDetails && Verbose) { 1767 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1768 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1769 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads); 1770 } 1771 } 1772 1773 #if !INCLUDE_ALL_GCS 1774 #ifdef ASSERT 1775 static bool verify_serial_gc_flags() { 1776 return (UseSerialGC && 1777 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || 1778 UseParallelGC || UseParallelOldGC)); 1779 } 1780 #endif // ASSERT 1781 #endif // INCLUDE_ALL_GCS 1782 1783 void Arguments::set_gc_specific_flags() { 1784 #if INCLUDE_ALL_GCS 1785 // Set per-collector flags 1786 if (UseParallelGC || UseParallelOldGC) { 1787 set_parallel_gc_flags(); 1788 } else if (UseConcMarkSweepGC) { // Should be done before ParNew check below 1789 set_cms_and_parnew_gc_flags(); 1790 } else if (UseParNewGC) { // Skipped if CMS is set above 1791 set_parnew_gc_flags(); 1792 } else if (UseG1GC) { 1793 set_g1_gc_flags(); 1794 } 1795 check_deprecated_gcs(); 1796 check_deprecated_gc_flags(); 1797 if (AssumeMP && !UseSerialGC) { 1798 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 1799 warning("If the number of processors is expected to increase from one, then" 1800 " you should configure the number of parallel GC threads appropriately" 1801 " using -XX:ParallelGCThreads=N"); 1802 } 1803 } 1804 if (MinHeapFreeRatio == 100) { 1805 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1806 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99); 1807 } 1808 #else // INCLUDE_ALL_GCS 1809 assert(verify_serial_gc_flags(), "SerialGC unset"); 1810 #endif // INCLUDE_ALL_GCS 1811 } 1812 1813 julong Arguments::limit_by_allocatable_memory(julong limit) { 1814 julong max_allocatable; 1815 julong result = limit; 1816 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1817 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1818 } 1819 return result; 1820 } 1821 1822 // Use static initialization to get the default before parsing 1823 static const uintx DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1824 1825 void Arguments::set_heap_size() { 1826 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { 1827 // Deprecated flag 1828 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); 1829 } 1830 1831 const julong phys_mem = 1832 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1833 : (julong)MaxRAM; 1834 1835 // If the maximum heap size has not been set with -Xmx, 1836 // then set it as fraction of the size of physical memory, 1837 // respecting the maximum and minimum sizes of the heap. 1838 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1839 julong reasonable_max = phys_mem / MaxRAMFraction; 1840 1841 if (phys_mem <= MaxHeapSize * MinRAMFraction) { 1842 // Small physical memory, so use a minimum fraction of it for the heap 1843 reasonable_max = phys_mem / MinRAMFraction; 1844 } else { 1845 // Not-small physical memory, so require a heap at least 1846 // as large as MaxHeapSize 1847 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 1848 } 1849 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 1850 // Limit the heap size to ErgoHeapSizeLimit 1851 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 1852 } 1853 if (UseCompressedOops) { 1854 // Limit the heap size to the maximum possible when using compressed oops 1855 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 1856 1857 // HeapBaseMinAddress can be greater than default but not less than. 1858 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 1859 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 1860 // matches compressed oops printing flags 1861 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { 1862 jio_fprintf(defaultStream::error_stream(), 1863 "HeapBaseMinAddress must be at least " UINTX_FORMAT 1864 " (" UINTX_FORMAT "G) which is greater than value given " 1865 UINTX_FORMAT "\n", 1866 DefaultHeapBaseMinAddress, 1867 DefaultHeapBaseMinAddress/G, 1868 HeapBaseMinAddress); 1869 } 1870 FLAG_SET_ERGO(uintx, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 1871 } 1872 } 1873 1874 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 1875 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 1876 // but it should be not less than default MaxHeapSize. 1877 max_coop_heap -= HeapBaseMinAddress; 1878 } 1879 reasonable_max = MIN2(reasonable_max, max_coop_heap); 1880 } 1881 reasonable_max = limit_by_allocatable_memory(reasonable_max); 1882 1883 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 1884 // An initial heap size was specified on the command line, 1885 // so be sure that the maximum size is consistent. Done 1886 // after call to limit_by_allocatable_memory because that 1887 // method might reduce the allocation size. 1888 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 1889 } 1890 1891 if (PrintGCDetails && Verbose) { 1892 // Cannot use gclog_or_tty yet. 1893 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 1894 } 1895 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); 1896 } 1897 1898 // If the minimum or initial heap_size have not been set or requested to be set 1899 // ergonomically, set them accordingly. 1900 if (InitialHeapSize == 0 || min_heap_size() == 0) { 1901 julong reasonable_minimum = (julong)(OldSize + NewSize); 1902 1903 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 1904 1905 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 1906 1907 if (InitialHeapSize == 0) { 1908 julong reasonable_initial = phys_mem / InitialRAMFraction; 1909 1910 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 1911 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 1912 1913 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 1914 1915 if (PrintGCDetails && Verbose) { 1916 // Cannot use gclog_or_tty yet. 1917 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); 1918 } 1919 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); 1920 } 1921 // If the minimum heap size has not been set (via -Xms), 1922 // synchronize with InitialHeapSize to avoid errors with the default value. 1923 if (min_heap_size() == 0) { 1924 set_min_heap_size(MIN2((uintx)reasonable_minimum, InitialHeapSize)); 1925 if (PrintGCDetails && Verbose) { 1926 // Cannot use gclog_or_tty yet. 1927 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 1928 } 1929 } 1930 } 1931 } 1932 1933 // This must be called after ergonomics because we want bytecode rewriting 1934 // if the server compiler is used, or if UseSharedSpaces is disabled. 1935 void Arguments::set_bytecode_flags() { 1936 // Better not attempt to store into a read-only space. 1937 if (UseSharedSpaces) { 1938 FLAG_SET_DEFAULT(RewriteBytecodes, false); 1939 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1940 } 1941 1942 if (!RewriteBytecodes) { 1943 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1944 } 1945 } 1946 1947 // Aggressive optimization flags -XX:+AggressiveOpts 1948 void Arguments::set_aggressive_opts_flags() { 1949 #ifdef COMPILER2 1950 if (AggressiveUnboxing) { 1951 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1952 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1953 } else if (!EliminateAutoBox) { 1954 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 1955 AggressiveUnboxing = false; 1956 } 1957 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1958 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1959 } else if (!DoEscapeAnalysis) { 1960 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 1961 AggressiveUnboxing = false; 1962 } 1963 } 1964 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1965 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1966 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1967 } 1968 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1969 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1970 } 1971 1972 // Feed the cache size setting into the JDK 1973 char buffer[1024]; 1974 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 1975 add_property(buffer); 1976 } 1977 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 1978 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 1979 } 1980 #endif 1981 1982 if (AggressiveOpts) { 1983 // Sample flag setting code 1984 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1985 // FLAG_SET_DEFAULT(EliminateZeroing, true); 1986 // } 1987 } 1988 } 1989 1990 //=========================================================================================================== 1991 // Parsing of java.compiler property 1992 1993 void Arguments::process_java_compiler_argument(char* arg) { 1994 // For backwards compatibility, Djava.compiler=NONE or "" 1995 // causes us to switch to -Xint mode UNLESS -Xdebug 1996 // is also specified. 1997 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1998 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 1999 } 2000 } 2001 2002 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2003 _sun_java_launcher = os::strdup_check_oom(launcher); 2004 } 2005 2006 bool Arguments::created_by_java_launcher() { 2007 assert(_sun_java_launcher != NULL, "property must have value"); 2008 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2009 } 2010 2011 bool Arguments::sun_java_launcher_is_altjvm() { 2012 return _sun_java_launcher_is_altjvm; 2013 } 2014 2015 //=========================================================================================================== 2016 // Parsing of main arguments 2017 2018 bool Arguments::verify_interval(uintx val, uintx min, 2019 uintx max, const char* name) { 2020 // Returns true iff value is in the inclusive interval [min..max] 2021 // false, otherwise. 2022 if (val >= min && val <= max) { 2023 return true; 2024 } 2025 jio_fprintf(defaultStream::error_stream(), 2026 "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT 2027 " and " UINTX_FORMAT "\n", 2028 name, val, min, max); 2029 return false; 2030 } 2031 2032 bool Arguments::verify_min_value(intx val, intx min, const char* name) { 2033 // Returns true if given value is at least specified min threshold 2034 // false, otherwise. 2035 if (val >= min ) { 2036 return true; 2037 } 2038 jio_fprintf(defaultStream::error_stream(), 2039 "%s of " INTX_FORMAT " is invalid; must be at least " INTX_FORMAT "\n", 2040 name, val, min); 2041 return false; 2042 } 2043 2044 bool Arguments::verify_percentage(uintx value, const char* name) { 2045 if (is_percentage(value)) { 2046 return true; 2047 } 2048 jio_fprintf(defaultStream::error_stream(), 2049 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 2050 name, value); 2051 return false; 2052 } 2053 2054 // check if do gclog rotation 2055 // +UseGCLogFileRotation is a must, 2056 // no gc log rotation when log file not supplied or 2057 // NumberOfGCLogFiles is 0 2058 void check_gclog_consistency() { 2059 if (UseGCLogFileRotation) { 2060 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) { 2061 jio_fprintf(defaultStream::output_stream(), 2062 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n" 2063 "where num_of_file > 0\n" 2064 "GC log rotation is turned off\n"); 2065 UseGCLogFileRotation = false; 2066 } 2067 } 2068 2069 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) { 2070 FLAG_SET_CMDLINE(uintx, GCLogFileSize, 8*K); 2071 jio_fprintf(defaultStream::output_stream(), 2072 "GCLogFileSize changed to minimum 8K\n"); 2073 } 2074 } 2075 2076 // This function is called for -Xloggc:<filename>, it can be used 2077 // to check if a given file name(or string) conforms to the following 2078 // specification: 2079 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]" 2080 // %p and %t only allowed once. We only limit usage of filename not path 2081 bool is_filename_valid(const char *file_name) { 2082 const char* p = file_name; 2083 char file_sep = os::file_separator()[0]; 2084 const char* cp; 2085 // skip prefix path 2086 for (cp = file_name; *cp != '\0'; cp++) { 2087 if (*cp == '/' || *cp == file_sep) { 2088 p = cp + 1; 2089 } 2090 } 2091 2092 int count_p = 0; 2093 int count_t = 0; 2094 while (*p != '\0') { 2095 if ((*p >= '0' && *p <= '9') || 2096 (*p >= 'A' && *p <= 'Z') || 2097 (*p >= 'a' && *p <= 'z') || 2098 *p == '-' || 2099 *p == '_' || 2100 *p == '.') { 2101 p++; 2102 continue; 2103 } 2104 if (*p == '%') { 2105 if(*(p + 1) == 'p') { 2106 p += 2; 2107 count_p ++; 2108 continue; 2109 } 2110 if (*(p + 1) == 't') { 2111 p += 2; 2112 count_t ++; 2113 continue; 2114 } 2115 } 2116 return false; 2117 } 2118 return count_p < 2 && count_t < 2; 2119 } 2120 2121 bool Arguments::verify_MinHeapFreeRatio(FormatBuffer<80>& err_msg, uintx min_heap_free_ratio) { 2122 if (!is_percentage(min_heap_free_ratio)) { 2123 err_msg.print("MinHeapFreeRatio must have a value between 0 and 100"); 2124 return false; 2125 } 2126 if (min_heap_free_ratio > MaxHeapFreeRatio) { 2127 err_msg.print("MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 2128 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")", min_heap_free_ratio, 2129 MaxHeapFreeRatio); 2130 return false; 2131 } 2132 // This does not set the flag itself, but stores the value in a safe place for later usage. 2133 _min_heap_free_ratio = min_heap_free_ratio; 2134 return true; 2135 } 2136 2137 bool Arguments::verify_MaxHeapFreeRatio(FormatBuffer<80>& err_msg, uintx max_heap_free_ratio) { 2138 if (!is_percentage(max_heap_free_ratio)) { 2139 err_msg.print("MaxHeapFreeRatio must have a value between 0 and 100"); 2140 return false; 2141 } 2142 if (max_heap_free_ratio < MinHeapFreeRatio) { 2143 err_msg.print("MaxHeapFreeRatio (" UINTX_FORMAT ") must be greater than or " 2144 "equal to MinHeapFreeRatio (" UINTX_FORMAT ")", max_heap_free_ratio, 2145 MinHeapFreeRatio); 2146 return false; 2147 } 2148 // This does not set the flag itself, but stores the value in a safe place for later usage. 2149 _max_heap_free_ratio = max_heap_free_ratio; 2150 return true; 2151 } 2152 2153 // Check consistency of GC selection 2154 bool Arguments::check_gc_consistency_user() { 2155 check_gclog_consistency(); 2156 bool status = true; 2157 // Ensure that the user has not selected conflicting sets 2158 // of collectors. [Note: this check is merely a user convenience; 2159 // collectors over-ride each other so that only a non-conflicting 2160 // set is selected; however what the user gets is not what they 2161 // may have expected from the combination they asked for. It's 2162 // better to reduce user confusion by not allowing them to 2163 // select conflicting combinations. 2164 uint i = 0; 2165 if (UseSerialGC) i++; 2166 if (UseConcMarkSweepGC || UseParNewGC) i++; 2167 if (UseParallelGC || UseParallelOldGC) i++; 2168 if (UseG1GC) i++; 2169 if (i > 1) { 2170 jio_fprintf(defaultStream::error_stream(), 2171 "Conflicting collector combinations in option list; " 2172 "please refer to the release notes for the combinations " 2173 "allowed\n"); 2174 status = false; 2175 } 2176 return status; 2177 } 2178 2179 void Arguments::check_deprecated_gcs() { 2180 if (UseConcMarkSweepGC && !UseParNewGC) { 2181 warning("Using the DefNew young collector with the CMS collector is deprecated " 2182 "and will likely be removed in a future release"); 2183 } 2184 2185 if (UseParNewGC && !UseConcMarkSweepGC) { 2186 // !UseConcMarkSweepGC means that we are using serial old gc. Unfortunately we don't 2187 // set up UseSerialGC properly, so that can't be used in the check here. 2188 warning("Using the ParNew young collector with the Serial old collector is deprecated " 2189 "and will likely be removed in a future release"); 2190 } 2191 2192 if (CMSIncrementalMode) { 2193 warning("Using incremental CMS is deprecated and will likely be removed in a future release"); 2194 } 2195 } 2196 2197 void Arguments::check_deprecated_gc_flags() { 2198 if (FLAG_IS_CMDLINE(MaxGCMinorPauseMillis)) { 2199 warning("Using MaxGCMinorPauseMillis as minor pause goal is deprecated" 2200 "and will likely be removed in future release"); 2201 } 2202 if (FLAG_IS_CMDLINE(DefaultMaxRAMFraction)) { 2203 warning("DefaultMaxRAMFraction is deprecated and will likely be removed in a future release. " 2204 "Use MaxRAMFraction instead."); 2205 } 2206 if (FLAG_IS_CMDLINE(UseCMSCompactAtFullCollection)) { 2207 warning("UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release."); 2208 } 2209 if (FLAG_IS_CMDLINE(CMSFullGCsBeforeCompaction)) { 2210 warning("CMSFullGCsBeforeCompaction is deprecated and will likely be removed in a future release."); 2211 } 2212 if (FLAG_IS_CMDLINE(UseCMSCollectionPassing)) { 2213 warning("UseCMSCollectionPassing is deprecated and will likely be removed in a future release."); 2214 } 2215 } 2216 2217 // Check stack pages settings 2218 bool Arguments::check_stack_pages() 2219 { 2220 bool status = true; 2221 status = status && verify_min_value(StackYellowPages, 1, "StackYellowPages"); 2222 status = status && verify_min_value(StackRedPages, 1, "StackRedPages"); 2223 // greater stack shadow pages can't generate instruction to bang stack 2224 status = status && verify_interval(StackShadowPages, 1, 50, "StackShadowPages"); 2225 return status; 2226 } 2227 2228 // Check the consistency of vm_init_args 2229 bool Arguments::check_vm_args_consistency() { 2230 // Method for adding checks for flag consistency. 2231 // The intent is to warn the user of all possible conflicts, 2232 // before returning an error. 2233 // Note: Needs platform-dependent factoring. 2234 bool status = true; 2235 2236 if (TLABRefillWasteFraction == 0) { 2237 jio_fprintf(defaultStream::error_stream(), 2238 "TLABRefillWasteFraction should be a denominator, " 2239 "not " SIZE_FORMAT "\n", 2240 TLABRefillWasteFraction); 2241 status = false; 2242 } 2243 2244 status = status && verify_interval(AdaptiveSizePolicyWeight, 0, 100, 2245 "AdaptiveSizePolicyWeight"); 2246 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 2247 2248 // Divide by bucket size to prevent a large size from causing rollover when 2249 // calculating amount of memory needed to be allocated for the String table. 2250 status = status && verify_interval(StringTableSize, minimumStringTableSize, 2251 (max_uintx / StringTable::bucket_size()), "StringTable size"); 2252 2253 status = status && verify_interval(SymbolTableSize, minimumSymbolTableSize, 2254 (max_uintx / SymbolTable::bucket_size()), "SymbolTable size"); 2255 2256 { 2257 // Using "else if" below to avoid printing two error messages if min > max. 2258 // This will also prevent us from reporting both min>100 and max>100 at the 2259 // same time, but that is less annoying than printing two identical errors IMHO. 2260 FormatBuffer<80> err_msg("%s",""); 2261 if (!verify_MinHeapFreeRatio(err_msg, MinHeapFreeRatio)) { 2262 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer()); 2263 status = false; 2264 } else if (!verify_MaxHeapFreeRatio(err_msg, MaxHeapFreeRatio)) { 2265 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer()); 2266 status = false; 2267 } 2268 } 2269 2270 // Min/MaxMetaspaceFreeRatio 2271 status = status && verify_percentage(MinMetaspaceFreeRatio, "MinMetaspaceFreeRatio"); 2272 status = status && verify_percentage(MaxMetaspaceFreeRatio, "MaxMetaspaceFreeRatio"); 2273 2274 if (MinMetaspaceFreeRatio > MaxMetaspaceFreeRatio) { 2275 jio_fprintf(defaultStream::error_stream(), 2276 "MinMetaspaceFreeRatio (%s" UINTX_FORMAT ") must be less than or " 2277 "equal to MaxMetaspaceFreeRatio (%s" UINTX_FORMAT ")\n", 2278 FLAG_IS_DEFAULT(MinMetaspaceFreeRatio) ? "Default: " : "", 2279 MinMetaspaceFreeRatio, 2280 FLAG_IS_DEFAULT(MaxMetaspaceFreeRatio) ? "Default: " : "", 2281 MaxMetaspaceFreeRatio); 2282 status = false; 2283 } 2284 2285 // Trying to keep 100% free is not practical 2286 MinMetaspaceFreeRatio = MIN2(MinMetaspaceFreeRatio, (uintx) 99); 2287 2288 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 2289 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 2290 } 2291 2292 if (UseParallelOldGC && ParallelOldGCSplitALot) { 2293 // Settings to encourage splitting. 2294 if (!FLAG_IS_CMDLINE(NewRatio)) { 2295 FLAG_SET_CMDLINE(uintx, NewRatio, 2); 2296 } 2297 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { 2298 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2299 } 2300 } 2301 2302 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) { 2303 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false); 2304 } 2305 2306 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 2307 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); 2308 if (GCTimeLimit == 100) { 2309 // Turn off gc-overhead-limit-exceeded checks 2310 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 2311 } 2312 2313 status = status && ArgumentsExt::check_gc_consistency_user(); 2314 status = status && check_stack_pages(); 2315 2316 if (CMSIncrementalMode) { 2317 if (!UseConcMarkSweepGC) { 2318 jio_fprintf(defaultStream::error_stream(), 2319 "error: invalid argument combination.\n" 2320 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 2321 "selected in order\nto use CMSIncrementalMode.\n"); 2322 status = false; 2323 } else { 2324 status = status && verify_percentage(CMSIncrementalDutyCycle, 2325 "CMSIncrementalDutyCycle"); 2326 status = status && verify_percentage(CMSIncrementalDutyCycleMin, 2327 "CMSIncrementalDutyCycleMin"); 2328 status = status && verify_percentage(CMSIncrementalSafetyFactor, 2329 "CMSIncrementalSafetyFactor"); 2330 status = status && verify_percentage(CMSIncrementalOffset, 2331 "CMSIncrementalOffset"); 2332 status = status && verify_percentage(CMSExpAvgFactor, 2333 "CMSExpAvgFactor"); 2334 // If it was not set on the command line, set 2335 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 2336 if (CMSInitiatingOccupancyFraction < 0) { 2337 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 2338 } 2339 } 2340 } 2341 2342 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 2343 // insists that we hold the requisite locks so that the iteration is 2344 // MT-safe. For the verification at start-up and shut-down, we don't 2345 // yet have a good way of acquiring and releasing these locks, 2346 // which are not visible at the CollectedHeap level. We want to 2347 // be able to acquire these locks and then do the iteration rather 2348 // than just disable the lock verification. This will be fixed under 2349 // bug 4788986. 2350 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 2351 if (VerifyDuringStartup) { 2352 warning("Heap verification at start-up disabled " 2353 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2354 VerifyDuringStartup = false; // Disable verification at start-up 2355 } 2356 2357 if (VerifyBeforeExit) { 2358 warning("Heap verification at shutdown disabled " 2359 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2360 VerifyBeforeExit = false; // Disable verification at shutdown 2361 } 2362 } 2363 2364 // Note: only executed in non-PRODUCT mode 2365 if (!UseAsyncConcMarkSweepGC && 2366 (ExplicitGCInvokesConcurrent || 2367 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 2368 jio_fprintf(defaultStream::error_stream(), 2369 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts" 2370 " with -UseAsyncConcMarkSweepGC"); 2371 status = false; 2372 } 2373 2374 status = status && verify_min_value(ParGCArrayScanChunk, 1, "ParGCArrayScanChunk"); 2375 2376 #if INCLUDE_ALL_GCS 2377 if (UseG1GC) { 2378 status = status && verify_percentage(G1NewSizePercent, "G1NewSizePercent"); 2379 status = status && verify_percentage(G1MaxNewSizePercent, "G1MaxNewSizePercent"); 2380 status = status && verify_interval(G1NewSizePercent, 0, G1MaxNewSizePercent, "G1NewSizePercent"); 2381 2382 status = status && verify_percentage(InitiatingHeapOccupancyPercent, 2383 "InitiatingHeapOccupancyPercent"); 2384 status = status && verify_min_value(G1RefProcDrainInterval, 1, 2385 "G1RefProcDrainInterval"); 2386 status = status && verify_min_value((intx)G1ConcMarkStepDurationMillis, 1, 2387 "G1ConcMarkStepDurationMillis"); 2388 status = status && verify_interval(G1ConcRSHotCardLimit, 0, max_jubyte, 2389 "G1ConcRSHotCardLimit"); 2390 status = status && verify_interval(G1ConcRSLogCacheSize, 0, 31, 2391 "G1ConcRSLogCacheSize"); 2392 status = status && verify_interval(StringDeduplicationAgeThreshold, 1, markOopDesc::max_age, 2393 "StringDeduplicationAgeThreshold"); 2394 } 2395 if (UseConcMarkSweepGC) { 2396 status = status && verify_min_value(CMSOldPLABNumRefills, 1, "CMSOldPLABNumRefills"); 2397 status = status && verify_min_value(CMSOldPLABToleranceFactor, 1, "CMSOldPLABToleranceFactor"); 2398 status = status && verify_min_value(CMSOldPLABMax, 1, "CMSOldPLABMax"); 2399 status = status && verify_interval(CMSOldPLABMin, 1, CMSOldPLABMax, "CMSOldPLABMin"); 2400 2401 status = status && verify_min_value(CMSYoungGenPerWorker, 1, "CMSYoungGenPerWorker"); 2402 2403 status = status && verify_min_value(CMSSamplingGrain, 1, "CMSSamplingGrain"); 2404 status = status && verify_interval(CMS_SweepWeight, 0, 100, "CMS_SweepWeight"); 2405 status = status && verify_interval(CMS_FLSWeight, 0, 100, "CMS_FLSWeight"); 2406 2407 status = status && verify_interval(FLSCoalescePolicy, 0, 4, "FLSCoalescePolicy"); 2408 2409 status = status && verify_min_value(CMSRescanMultiple, 1, "CMSRescanMultiple"); 2410 status = status && verify_min_value(CMSConcMarkMultiple, 1, "CMSConcMarkMultiple"); 2411 2412 status = status && verify_interval(CMSPrecleanIter, 0, 9, "CMSPrecleanIter"); 2413 status = status && verify_min_value(CMSPrecleanDenominator, 1, "CMSPrecleanDenominator"); 2414 status = status && verify_interval(CMSPrecleanNumerator, 0, CMSPrecleanDenominator - 1, "CMSPrecleanNumerator"); 2415 2416 status = status && verify_percentage(CMSBootstrapOccupancy, "CMSBootstrapOccupancy"); 2417 2418 status = status && verify_min_value(CMSPrecleanThreshold, 100, "CMSPrecleanThreshold"); 2419 2420 status = status && verify_percentage(CMSScheduleRemarkEdenPenetration, "CMSScheduleRemarkEdenPenetration"); 2421 status = status && verify_min_value(CMSScheduleRemarkSamplingRatio, 1, "CMSScheduleRemarkSamplingRatio"); 2422 status = status && verify_min_value(CMSBitMapYieldQuantum, 1, "CMSBitMapYieldQuantum"); 2423 status = status && verify_percentage(CMSTriggerRatio, "CMSTriggerRatio"); 2424 status = status && verify_percentage(CMSIsTooFullPercentage, "CMSIsTooFullPercentage"); 2425 } 2426 2427 if (UseParallelGC || UseParallelOldGC) { 2428 status = status && verify_interval(ParallelOldDeadWoodLimiterMean, 0, 100, "ParallelOldDeadWoodLimiterMean"); 2429 status = status && verify_interval(ParallelOldDeadWoodLimiterStdDev, 0, 100, "ParallelOldDeadWoodLimiterStdDev"); 2430 2431 status = status && verify_percentage(YoungGenerationSizeIncrement, "YoungGenerationSizeIncrement"); 2432 status = status && verify_percentage(TenuredGenerationSizeIncrement, "TenuredGenerationSizeIncrement"); 2433 2434 status = status && verify_min_value(YoungGenerationSizeSupplementDecay, 1, "YoungGenerationSizeSupplementDecay"); 2435 status = status && verify_min_value(TenuredGenerationSizeSupplementDecay, 1, "TenuredGenerationSizeSupplementDecay"); 2436 2437 status = status && verify_min_value(ParGCCardsPerStrideChunk, 1, "ParGCCardsPerStrideChunk"); 2438 2439 status = status && verify_min_value(ParallelOldGCSplitInterval, 0, "ParallelOldGCSplitInterval"); 2440 } 2441 #endif // INCLUDE_ALL_GCS 2442 2443 status = status && verify_interval(RefDiscoveryPolicy, 2444 ReferenceProcessor::DiscoveryPolicyMin, 2445 ReferenceProcessor::DiscoveryPolicyMax, 2446 "RefDiscoveryPolicy"); 2447 2448 // Limit the lower bound of this flag to 1 as it is used in a division 2449 // expression. 2450 status = status && verify_interval(TLABWasteTargetPercent, 2451 1, 100, "TLABWasteTargetPercent"); 2452 2453 status = status && verify_object_alignment(); 2454 2455 status = status && verify_interval(CompressedClassSpaceSize, 1*M, 3*G, 2456 "CompressedClassSpaceSize"); 2457 2458 status = status && verify_interval(MarkStackSizeMax, 2459 1, (max_jint - 1), "MarkStackSizeMax"); 2460 status = status && verify_interval(NUMAChunkResizeWeight, 0, 100, "NUMAChunkResizeWeight"); 2461 2462 status = status && verify_min_value(LogEventsBufferEntries, 1, "LogEventsBufferEntries"); 2463 2464 status = status && verify_min_value(HeapSizePerGCThread, (uintx) os::vm_page_size(), "HeapSizePerGCThread"); 2465 2466 status = status && verify_min_value(GCTaskTimeStampEntries, 1, "GCTaskTimeStampEntries"); 2467 2468 status = status && verify_percentage(ParallelGCBufferWastePct, "ParallelGCBufferWastePct"); 2469 status = status && verify_interval(TargetPLABWastePct, 1, 100, "TargetPLABWastePct"); 2470 2471 status = status && verify_min_value(ParGCStridesPerThread, 1, "ParGCStridesPerThread"); 2472 2473 status = status && verify_min_value(MinRAMFraction, 1, "MinRAMFraction"); 2474 status = status && verify_min_value(InitialRAMFraction, 1, "InitialRAMFraction"); 2475 status = status && verify_min_value(MaxRAMFraction, 1, "MaxRAMFraction"); 2476 status = status && verify_min_value(DefaultMaxRAMFraction, 1, "DefaultMaxRAMFraction"); 2477 2478 status = status && verify_interval(AdaptiveTimeWeight, 0, 100, "AdaptiveTimeWeight"); 2479 status = status && verify_min_value(AdaptiveSizeDecrementScaleFactor, 1, "AdaptiveSizeDecrementScaleFactor"); 2480 2481 status = status && verify_interval(TLABAllocationWeight, 0, 100, "TLABAllocationWeight"); 2482 status = status && verify_min_value(MinTLABSize, 1, "MinTLABSize"); 2483 status = status && verify_min_value(TLABRefillWasteFraction, 1, "TLABRefillWasteFraction"); 2484 2485 status = status && verify_percentage(YoungGenerationSizeSupplement, "YoungGenerationSizeSupplement"); 2486 status = status && verify_percentage(TenuredGenerationSizeSupplement, "TenuredGenerationSizeSupplement"); 2487 2488 status = status && verify_interval(MaxTenuringThreshold, 0, markOopDesc::max_age + 1, "MaxTenuringThreshold"); 2489 status = status && verify_interval(InitialTenuringThreshold, 0, MaxTenuringThreshold, "InitialTenuringThreshold"); 2490 status = status && verify_percentage(TargetSurvivorRatio, "TargetSurvivorRatio"); 2491 status = status && verify_percentage(MarkSweepDeadRatio, "MarkSweepDeadRatio"); 2492 2493 status = status && verify_min_value(MarkSweepAlwaysCompactCount, 1, "MarkSweepAlwaysCompactCount"); 2494 #ifdef COMPILER1 2495 status = status && verify_min_value(ValueMapInitialSize, 1, "ValueMapInitialSize"); 2496 #endif 2497 2498 if (PrintNMTStatistics) { 2499 #if INCLUDE_NMT 2500 if (MemTracker::tracking_level() == NMT_off) { 2501 #endif // INCLUDE_NMT 2502 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2503 PrintNMTStatistics = false; 2504 #if INCLUDE_NMT 2505 } 2506 #endif 2507 } 2508 2509 // Need to limit the extent of the padding to reasonable size. 2510 // 8K is well beyond the reasonable HW cache line size, even with the 2511 // aggressive prefetching, while still leaving the room for segregating 2512 // among the distinct pages. 2513 if (ContendedPaddingWidth < 0 || ContendedPaddingWidth > 8192) { 2514 jio_fprintf(defaultStream::error_stream(), 2515 "ContendedPaddingWidth=" INTX_FORMAT " must be in between %d and %d\n", 2516 ContendedPaddingWidth, 0, 8192); 2517 status = false; 2518 } 2519 2520 // Need to enforce the padding not to break the existing field alignments. 2521 // It is sufficient to check against the largest type size. 2522 if ((ContendedPaddingWidth % BytesPerLong) != 0) { 2523 jio_fprintf(defaultStream::error_stream(), 2524 "ContendedPaddingWidth=" INTX_FORMAT " must be a multiple of %d\n", 2525 ContendedPaddingWidth, BytesPerLong); 2526 status = false; 2527 } 2528 2529 // Check lower bounds of the code cache 2530 // Template Interpreter code is approximately 3X larger in debug builds. 2531 uint min_code_cache_size = (CodeCacheMinimumUseSpace DEBUG_ONLY(* 3)) + CodeCacheMinimumFreeSpace; 2532 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) { 2533 jio_fprintf(defaultStream::error_stream(), 2534 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K, 2535 os::vm_page_size()/K); 2536 status = false; 2537 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) { 2538 jio_fprintf(defaultStream::error_stream(), 2539 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", 2540 ReservedCodeCacheSize/K, InitialCodeCacheSize/K); 2541 status = false; 2542 } else if (ReservedCodeCacheSize < min_code_cache_size) { 2543 jio_fprintf(defaultStream::error_stream(), 2544 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, 2545 min_code_cache_size/K); 2546 status = false; 2547 } else if (ReservedCodeCacheSize > 2*G) { 2548 // Code cache size larger than MAXINT is not supported. 2549 jio_fprintf(defaultStream::error_stream(), 2550 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, 2551 (2*G)/M); 2552 status = false; 2553 } else if (NonNMethodCodeHeapSize < min_code_cache_size){ 2554 jio_fprintf(defaultStream::error_stream(), 2555 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, 2556 min_code_cache_size/K); 2557 status = false; 2558 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) 2559 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 2560 jio_fprintf(defaultStream::error_stream(), 2561 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 2562 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 2563 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 2564 status = false; 2565 } 2566 2567 status &= verify_interval(NmethodSweepFraction, 1, ReservedCodeCacheSize/K, "NmethodSweepFraction"); 2568 status &= verify_interval(NmethodSweepActivity, 0, 2000, "NmethodSweepActivity"); 2569 status &= verify_interval(CodeCacheMinBlockLength, 1, 100, "CodeCacheMinBlockLength"); 2570 status &= verify_interval(CodeCacheSegmentSize, 1, 1024, "CodeCacheSegmentSize"); 2571 2572 int min_number_of_compiler_threads = get_min_number_of_compiler_threads(); 2573 // The default CICompilerCount's value is CI_COMPILER_COUNT. 2574 assert(min_number_of_compiler_threads <= CI_COMPILER_COUNT, "minimum should be less or equal default number"); 2575 // Check the minimum number of compiler threads 2576 status &=verify_min_value(CICompilerCount, min_number_of_compiler_threads, "CICompilerCount"); 2577 2578 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { 2579 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); 2580 } 2581 2582 return status; 2583 } 2584 2585 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2586 const char* option_type) { 2587 if (ignore) return false; 2588 2589 const char* spacer = " "; 2590 if (option_type == NULL) { 2591 option_type = ++spacer; // Set both to the empty string. 2592 } 2593 2594 if (os::obsolete_option(option)) { 2595 jio_fprintf(defaultStream::error_stream(), 2596 "Obsolete %s%soption: %s\n", option_type, spacer, 2597 option->optionString); 2598 return false; 2599 } else { 2600 jio_fprintf(defaultStream::error_stream(), 2601 "Unrecognized %s%soption: %s\n", option_type, spacer, 2602 option->optionString); 2603 return true; 2604 } 2605 } 2606 2607 static const char* user_assertion_options[] = { 2608 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2609 }; 2610 2611 static const char* system_assertion_options[] = { 2612 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2613 }; 2614 2615 // Return true if any of the strings in null-terminated array 'names' matches. 2616 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 2617 // the option must match exactly. 2618 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 2619 bool tail_allowed) { 2620 for (/* empty */; *names != NULL; ++names) { 2621 if (match_option(option, *names, tail)) { 2622 if (**tail == '\0' || tail_allowed && **tail == ':') { 2623 return true; 2624 } 2625 } 2626 } 2627 return false; 2628 } 2629 2630 bool Arguments::parse_uintx(const char* value, 2631 uintx* uintx_arg, 2632 uintx min_size) { 2633 2634 // Check the sign first since atomull() parses only unsigned values. 2635 bool value_is_positive = !(*value == '-'); 2636 2637 if (value_is_positive) { 2638 julong n; 2639 bool good_return = atomull(value, &n); 2640 if (good_return) { 2641 bool above_minimum = n >= min_size; 2642 bool value_is_too_large = n > max_uintx; 2643 2644 if (above_minimum && !value_is_too_large) { 2645 *uintx_arg = n; 2646 return true; 2647 } 2648 } 2649 } 2650 return false; 2651 } 2652 2653 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2654 julong* long_arg, 2655 julong min_size) { 2656 if (!atomull(s, long_arg)) return arg_unreadable; 2657 return check_memory_size(*long_arg, min_size); 2658 } 2659 2660 // Parse JavaVMInitArgs structure 2661 2662 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 2663 // For components of the system classpath. 2664 SysClassPath scp(Arguments::get_sysclasspath()); 2665 bool scp_assembly_required = false; 2666 2667 // Save default settings for some mode flags 2668 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2669 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2670 Arguments::_ClipInlining = ClipInlining; 2671 Arguments::_BackgroundCompilation = BackgroundCompilation; 2672 2673 // Setup flags for mixed which is the default 2674 set_mode_flags(_mixed); 2675 2676 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 2677 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 2678 if (result != JNI_OK) { 2679 return result; 2680 } 2681 2682 // Parse JavaVMInitArgs structure passed in 2683 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, Flag::COMMAND_LINE); 2684 if (result != JNI_OK) { 2685 return result; 2686 } 2687 2688 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 2689 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 2690 if (result != JNI_OK) { 2691 return result; 2692 } 2693 2694 // Do final processing now that all arguments have been parsed 2695 result = finalize_vm_init_args(&scp, scp_assembly_required); 2696 if (result != JNI_OK) { 2697 return result; 2698 } 2699 2700 return JNI_OK; 2701 } 2702 2703 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2704 // represents a valid HPROF of JDWP agent. is_path==true denotes that we 2705 // are dealing with -agentpath (case where name is a path), otherwise with 2706 // -agentlib 2707 bool valid_hprof_or_jdwp_agent(char *name, bool is_path) { 2708 char *_name; 2709 const char *_hprof = "hprof", *_jdwp = "jdwp"; 2710 size_t _len_hprof, _len_jdwp, _len_prefix; 2711 2712 if (is_path) { 2713 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2714 return false; 2715 } 2716 2717 _name++; // skip past last path separator 2718 _len_prefix = strlen(JNI_LIB_PREFIX); 2719 2720 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2721 return false; 2722 } 2723 2724 _name += _len_prefix; 2725 _len_hprof = strlen(_hprof); 2726 _len_jdwp = strlen(_jdwp); 2727 2728 if (strncmp(_name, _hprof, _len_hprof) == 0) { 2729 _name += _len_hprof; 2730 } 2731 else if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2732 _name += _len_jdwp; 2733 } 2734 else { 2735 return false; 2736 } 2737 2738 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2739 return false; 2740 } 2741 2742 return true; 2743 } 2744 2745 if (strcmp(name, _hprof) == 0 || strcmp(name, _jdwp) == 0) { 2746 return true; 2747 } 2748 2749 return false; 2750 } 2751 2752 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 2753 SysClassPath* scp_p, 2754 bool* scp_assembly_required_p, 2755 Flag::Flags origin) { 2756 // Remaining part of option string 2757 const char* tail; 2758 2759 // iterate over arguments 2760 for (int index = 0; index < args->nOptions; index++) { 2761 bool is_absolute_path = false; // for -agentpath vs -agentlib 2762 2763 const JavaVMOption* option = args->options + index; 2764 2765 if (!match_option(option, "-Djava.class.path", &tail) && 2766 !match_option(option, "-Dsun.java.command", &tail) && 2767 !match_option(option, "-Dsun.java.launcher", &tail)) { 2768 2769 // add all jvm options to the jvm_args string. This string 2770 // is used later to set the java.vm.args PerfData string constant. 2771 // the -Djava.class.path and the -Dsun.java.command options are 2772 // omitted from jvm_args string as each have their own PerfData 2773 // string constant object. 2774 build_jvm_args(option->optionString); 2775 } 2776 2777 // -verbose:[class/gc/jni] 2778 if (match_option(option, "-verbose", &tail)) { 2779 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2780 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 2781 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 2782 } else if (!strcmp(tail, ":gc")) { 2783 FLAG_SET_CMDLINE(bool, PrintGC, true); 2784 } else if (!strcmp(tail, ":jni")) { 2785 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 2786 } 2787 // -da / -ea / -disableassertions / -enableassertions 2788 // These accept an optional class/package name separated by a colon, e.g., 2789 // -da:java.lang.Thread. 2790 } else if (match_option(option, user_assertion_options, &tail, true)) { 2791 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2792 if (*tail == '\0') { 2793 JavaAssertions::setUserClassDefault(enable); 2794 } else { 2795 assert(*tail == ':', "bogus match by match_option()"); 2796 JavaAssertions::addOption(tail + 1, enable); 2797 } 2798 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2799 } else if (match_option(option, system_assertion_options, &tail, false)) { 2800 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2801 JavaAssertions::setSystemClassDefault(enable); 2802 // -bootclasspath: 2803 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2804 scp_p->reset_path(tail); 2805 *scp_assembly_required_p = true; 2806 // -bootclasspath/a: 2807 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2808 scp_p->add_suffix(tail); 2809 *scp_assembly_required_p = true; 2810 // -bootclasspath/p: 2811 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2812 scp_p->add_prefix(tail); 2813 *scp_assembly_required_p = true; 2814 // -Xrun 2815 } else if (match_option(option, "-Xrun", &tail)) { 2816 if (tail != NULL) { 2817 const char* pos = strchr(tail, ':'); 2818 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2819 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2820 name[len] = '\0'; 2821 2822 char *options = NULL; 2823 if(pos != NULL) { 2824 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2825 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2); 2826 } 2827 #if !INCLUDE_JVMTI 2828 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 2829 jio_fprintf(defaultStream::error_stream(), 2830 "Profiling and debugging agents are not supported in this VM\n"); 2831 return JNI_ERR; 2832 } 2833 #endif // !INCLUDE_JVMTI 2834 add_init_library(name, options); 2835 } 2836 // -agentlib and -agentpath 2837 } else if (match_option(option, "-agentlib:", &tail) || 2838 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2839 if(tail != NULL) { 2840 const char* pos = strchr(tail, '='); 2841 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2842 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2843 name[len] = '\0'; 2844 2845 char *options = NULL; 2846 if(pos != NULL) { 2847 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1, mtInternal), pos + 1); 2848 } 2849 #if !INCLUDE_JVMTI 2850 if (valid_hprof_or_jdwp_agent(name, is_absolute_path)) { 2851 jio_fprintf(defaultStream::error_stream(), 2852 "Profiling and debugging agents are not supported in this VM\n"); 2853 return JNI_ERR; 2854 } 2855 #endif // !INCLUDE_JVMTI 2856 add_init_agent(name, options, is_absolute_path); 2857 } 2858 // -javaagent 2859 } else if (match_option(option, "-javaagent:", &tail)) { 2860 #if !INCLUDE_JVMTI 2861 jio_fprintf(defaultStream::error_stream(), 2862 "Instrumentation agents are not supported in this VM\n"); 2863 return JNI_ERR; 2864 #else 2865 if(tail != NULL) { 2866 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail); 2867 add_init_agent("instrument", options, false); 2868 } 2869 #endif // !INCLUDE_JVMTI 2870 // -Xnoclassgc 2871 } else if (match_option(option, "-Xnoclassgc", &tail)) { 2872 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 2873 // -Xincgc: i-CMS 2874 } else if (match_option(option, "-Xincgc", &tail)) { 2875 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 2876 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 2877 // -Xnoincgc: no i-CMS 2878 } else if (match_option(option, "-Xnoincgc", &tail)) { 2879 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 2880 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 2881 // -Xconcgc 2882 } else if (match_option(option, "-Xconcgc", &tail)) { 2883 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 2884 // -Xnoconcgc 2885 } else if (match_option(option, "-Xnoconcgc", &tail)) { 2886 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 2887 // -Xbatch 2888 } else if (match_option(option, "-Xbatch", &tail)) { 2889 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 2890 // -Xmn for compatibility with other JVM vendors 2891 } else if (match_option(option, "-Xmn", &tail)) { 2892 julong long_initial_young_size = 0; 2893 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2894 if (errcode != arg_in_range) { 2895 jio_fprintf(defaultStream::error_stream(), 2896 "Invalid initial young generation size: %s\n", option->optionString); 2897 describe_range_error(errcode); 2898 return JNI_EINVAL; 2899 } 2900 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_young_size); 2901 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_young_size); 2902 // -Xms 2903 } else if (match_option(option, "-Xms", &tail)) { 2904 julong long_initial_heap_size = 0; 2905 // an initial heap size of 0 means automatically determine 2906 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2907 if (errcode != arg_in_range) { 2908 jio_fprintf(defaultStream::error_stream(), 2909 "Invalid initial heap size: %s\n", option->optionString); 2910 describe_range_error(errcode); 2911 return JNI_EINVAL; 2912 } 2913 set_min_heap_size((uintx)long_initial_heap_size); 2914 // Currently the minimum size and the initial heap sizes are the same. 2915 // Can be overridden with -XX:InitialHeapSize. 2916 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); 2917 // -Xmx 2918 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2919 julong long_max_heap_size = 0; 2920 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2921 if (errcode != arg_in_range) { 2922 jio_fprintf(defaultStream::error_stream(), 2923 "Invalid maximum heap size: %s\n", option->optionString); 2924 describe_range_error(errcode); 2925 return JNI_EINVAL; 2926 } 2927 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); 2928 // Xmaxf 2929 } else if (match_option(option, "-Xmaxf", &tail)) { 2930 char* err; 2931 int maxf = (int)(strtod(tail, &err) * 100); 2932 if (*err != '\0' || *tail == '\0' || maxf < 0 || maxf > 100) { 2933 jio_fprintf(defaultStream::error_stream(), 2934 "Bad max heap free percentage size: %s\n", 2935 option->optionString); 2936 return JNI_EINVAL; 2937 } else { 2938 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 2939 } 2940 // Xminf 2941 } else if (match_option(option, "-Xminf", &tail)) { 2942 char* err; 2943 int minf = (int)(strtod(tail, &err) * 100); 2944 if (*err != '\0' || *tail == '\0' || minf < 0 || minf > 100) { 2945 jio_fprintf(defaultStream::error_stream(), 2946 "Bad min heap free percentage size: %s\n", 2947 option->optionString); 2948 return JNI_EINVAL; 2949 } else { 2950 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 2951 } 2952 // -Xss 2953 } else if (match_option(option, "-Xss", &tail)) { 2954 julong long_ThreadStackSize = 0; 2955 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 2956 if (errcode != arg_in_range) { 2957 jio_fprintf(defaultStream::error_stream(), 2958 "Invalid thread stack size: %s\n", option->optionString); 2959 describe_range_error(errcode); 2960 return JNI_EINVAL; 2961 } 2962 // Internally track ThreadStackSize in units of 1024 bytes. 2963 FLAG_SET_CMDLINE(intx, ThreadStackSize, 2964 round_to((int)long_ThreadStackSize, K) / K); 2965 // -Xoss 2966 } else if (match_option(option, "-Xoss", &tail)) { 2967 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 2968 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) { 2969 julong long_CodeCacheExpansionSize = 0; 2970 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size()); 2971 if (errcode != arg_in_range) { 2972 jio_fprintf(defaultStream::error_stream(), 2973 "Invalid argument: %s. Must be at least %luK.\n", option->optionString, 2974 os::vm_page_size()/K); 2975 return JNI_EINVAL; 2976 } 2977 FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize); 2978 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2979 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2980 julong long_ReservedCodeCacheSize = 0; 2981 2982 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2983 if (errcode != arg_in_range) { 2984 jio_fprintf(defaultStream::error_stream(), 2985 "Invalid maximum code cache size: %s.\n", option->optionString); 2986 return JNI_EINVAL; 2987 } 2988 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 2989 // -XX:NonNMethodCodeHeapSize= 2990 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) { 2991 julong long_NonNMethodCodeHeapSize = 0; 2992 2993 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1); 2994 if (errcode != arg_in_range) { 2995 jio_fprintf(defaultStream::error_stream(), 2996 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString); 2997 return JNI_EINVAL; 2998 } 2999 FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize); 3000 // -XX:ProfiledCodeHeapSize= 3001 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) { 3002 julong long_ProfiledCodeHeapSize = 0; 3003 3004 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1); 3005 if (errcode != arg_in_range) { 3006 jio_fprintf(defaultStream::error_stream(), 3007 "Invalid maximum profiled code heap size: %s.\n", option->optionString); 3008 return JNI_EINVAL; 3009 } 3010 FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize); 3011 // -XX:NonProfiledCodeHeapSizee= 3012 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) { 3013 julong long_NonProfiledCodeHeapSize = 0; 3014 3015 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1); 3016 if (errcode != arg_in_range) { 3017 jio_fprintf(defaultStream::error_stream(), 3018 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString); 3019 return JNI_EINVAL; 3020 } 3021 FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize); 3022 //-XX:IncreaseFirstTierCompileThresholdAt= 3023 } else if (match_option(option, "-XX:IncreaseFirstTierCompileThresholdAt=", &tail)) { 3024 uintx uint_IncreaseFirstTierCompileThresholdAt = 0; 3025 if (!parse_uintx(tail, &uint_IncreaseFirstTierCompileThresholdAt, 0) || uint_IncreaseFirstTierCompileThresholdAt > 99) { 3026 jio_fprintf(defaultStream::error_stream(), 3027 "Invalid value for IncreaseFirstTierCompileThresholdAt: %s. Should be between 0 and 99.\n", 3028 option->optionString); 3029 return JNI_EINVAL; 3030 } 3031 FLAG_SET_CMDLINE(uintx, IncreaseFirstTierCompileThresholdAt, (uintx)uint_IncreaseFirstTierCompileThresholdAt); 3032 // -green 3033 } else if (match_option(option, "-green", &tail)) { 3034 jio_fprintf(defaultStream::error_stream(), 3035 "Green threads support not available\n"); 3036 return JNI_EINVAL; 3037 // -native 3038 } else if (match_option(option, "-native", &tail)) { 3039 // HotSpot always uses native threads, ignore silently for compatibility 3040 // -Xsqnopause 3041 } else if (match_option(option, "-Xsqnopause", &tail)) { 3042 // EVM option, ignore silently for compatibility 3043 // -Xrs 3044 } else if (match_option(option, "-Xrs", &tail)) { 3045 // Classic/EVM option, new functionality 3046 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 3047 } else if (match_option(option, "-Xusealtsigs", &tail)) { 3048 // change default internal VM signals used - lower case for back compat 3049 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 3050 // -Xoptimize 3051 } else if (match_option(option, "-Xoptimize", &tail)) { 3052 // EVM option, ignore silently for compatibility 3053 // -Xprof 3054 } else if (match_option(option, "-Xprof", &tail)) { 3055 #if INCLUDE_FPROF 3056 _has_profile = true; 3057 #else // INCLUDE_FPROF 3058 jio_fprintf(defaultStream::error_stream(), 3059 "Flat profiling is not supported in this VM.\n"); 3060 return JNI_ERR; 3061 #endif // INCLUDE_FPROF 3062 // -Xconcurrentio 3063 } else if (match_option(option, "-Xconcurrentio", &tail)) { 3064 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 3065 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 3066 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 3067 FLAG_SET_CMDLINE(bool, UseTLAB, false); 3068 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 3069 3070 // -Xinternalversion 3071 } else if (match_option(option, "-Xinternalversion", &tail)) { 3072 jio_fprintf(defaultStream::output_stream(), "%s\n", 3073 VM_Version::internal_vm_info_string()); 3074 vm_exit(0); 3075 #ifndef PRODUCT 3076 // -Xprintflags 3077 } else if (match_option(option, "-Xprintflags", &tail)) { 3078 CommandLineFlags::printFlags(tty, false); 3079 vm_exit(0); 3080 #endif 3081 // -D 3082 } else if (match_option(option, "-D", &tail)) { 3083 if (!add_property(tail)) { 3084 return JNI_ENOMEM; 3085 } 3086 // Out of the box management support 3087 if (match_option(option, "-Dcom.sun.management", &tail)) { 3088 #if INCLUDE_MANAGEMENT 3089 FLAG_SET_CMDLINE(bool, ManagementServer, true); 3090 #else 3091 jio_fprintf(defaultStream::output_stream(), 3092 "-Dcom.sun.management is not supported in this VM.\n"); 3093 return JNI_ERR; 3094 #endif 3095 } 3096 // -Xint 3097 } else if (match_option(option, "-Xint", &tail)) { 3098 set_mode_flags(_int); 3099 // -Xmixed 3100 } else if (match_option(option, "-Xmixed", &tail)) { 3101 set_mode_flags(_mixed); 3102 // -Xcomp 3103 } else if (match_option(option, "-Xcomp", &tail)) { 3104 // for testing the compiler; turn off all flags that inhibit compilation 3105 set_mode_flags(_comp); 3106 // -Xshare:dump 3107 } else if (match_option(option, "-Xshare:dump", &tail)) { 3108 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 3109 set_mode_flags(_int); // Prevent compilation, which creates objects 3110 // -Xshare:on 3111 } else if (match_option(option, "-Xshare:on", &tail)) { 3112 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3113 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 3114 // -Xshare:auto 3115 } else if (match_option(option, "-Xshare:auto", &tail)) { 3116 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3117 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 3118 // -Xshare:off 3119 } else if (match_option(option, "-Xshare:off", &tail)) { 3120 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 3121 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 3122 // -Xverify 3123 } else if (match_option(option, "-Xverify", &tail)) { 3124 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 3125 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 3126 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 3127 } else if (strcmp(tail, ":remote") == 0) { 3128 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 3129 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 3130 } else if (strcmp(tail, ":none") == 0) { 3131 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 3132 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 3133 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 3134 return JNI_EINVAL; 3135 } 3136 // -Xdebug 3137 } else if (match_option(option, "-Xdebug", &tail)) { 3138 // note this flag has been used, then ignore 3139 set_xdebug_mode(true); 3140 // -Xnoagent 3141 } else if (match_option(option, "-Xnoagent", &tail)) { 3142 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 3143 } else if (match_option(option, "-Xboundthreads", &tail)) { 3144 // Bind user level threads to kernel threads (Solaris only) 3145 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 3146 } else if (match_option(option, "-Xloggc:", &tail)) { 3147 // Redirect GC output to the file. -Xloggc:<filename> 3148 // ostream_init_log(), when called will use this filename 3149 // to initialize a fileStream. 3150 _gc_log_filename = os::strdup_check_oom(tail); 3151 if (!is_filename_valid(_gc_log_filename)) { 3152 jio_fprintf(defaultStream::output_stream(), 3153 "Invalid file name for use with -Xloggc: Filename can only contain the " 3154 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n" 3155 "Note %%p or %%t can only be used once\n", _gc_log_filename); 3156 return JNI_EINVAL; 3157 } 3158 FLAG_SET_CMDLINE(bool, PrintGC, true); 3159 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 3160 3161 // JNI hooks 3162 } else if (match_option(option, "-Xcheck", &tail)) { 3163 if (!strcmp(tail, ":jni")) { 3164 #if !INCLUDE_JNI_CHECK 3165 warning("JNI CHECKING is not supported in this VM"); 3166 #else 3167 CheckJNICalls = true; 3168 #endif // INCLUDE_JNI_CHECK 3169 } else if (is_bad_option(option, args->ignoreUnrecognized, 3170 "check")) { 3171 return JNI_EINVAL; 3172 } 3173 } else if (match_option(option, "vfprintf", &tail)) { 3174 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 3175 } else if (match_option(option, "exit", &tail)) { 3176 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 3177 } else if (match_option(option, "abort", &tail)) { 3178 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 3179 // -XX:+AggressiveHeap 3180 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 3181 3182 // This option inspects the machine and attempts to set various 3183 // parameters to be optimal for long-running, memory allocation 3184 // intensive jobs. It is intended for machines with large 3185 // amounts of cpu and memory. 3186 3187 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 3188 // VM, but we may not be able to represent the total physical memory 3189 // available (like having 8gb of memory on a box but using a 32bit VM). 3190 // Thus, we need to make sure we're using a julong for intermediate 3191 // calculations. 3192 julong initHeapSize; 3193 julong total_memory = os::physical_memory(); 3194 3195 if (total_memory < (julong)256*M) { 3196 jio_fprintf(defaultStream::error_stream(), 3197 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 3198 vm_exit(1); 3199 } 3200 3201 // The heap size is half of available memory, or (at most) 3202 // all of possible memory less 160mb (leaving room for the OS 3203 // when using ISM). This is the maximum; because adaptive sizing 3204 // is turned on below, the actual space used may be smaller. 3205 3206 initHeapSize = MIN2(total_memory / (julong)2, 3207 total_memory - (julong)160*M); 3208 3209 initHeapSize = limit_by_allocatable_memory(initHeapSize); 3210 3211 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 3212 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 3213 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); 3214 // Currently the minimum size and the initial heap sizes are the same. 3215 set_min_heap_size(initHeapSize); 3216 } 3217 if (FLAG_IS_DEFAULT(NewSize)) { 3218 // Make the young generation 3/8ths of the total heap. 3219 FLAG_SET_CMDLINE(uintx, NewSize, 3220 ((julong)MaxHeapSize / (julong)8) * (julong)3); 3221 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 3222 } 3223 3224 #ifndef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. 3225 FLAG_SET_DEFAULT(UseLargePages, true); 3226 #endif 3227 3228 // Increase some data structure sizes for efficiency 3229 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 3230 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 3231 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 3232 3233 // See the OldPLABSize comment below, but replace 'after promotion' 3234 // with 'after copying'. YoungPLABSize is the size of the survivor 3235 // space per-gc-thread buffers. The default is 4kw. 3236 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 3237 3238 // OldPLABSize is the size of the buffers in the old gen that 3239 // UseParallelGC uses to promote live data that doesn't fit in the 3240 // survivor spaces. At any given time, there's one for each gc thread. 3241 // The default size is 1kw. These buffers are rarely used, since the 3242 // survivor spaces are usually big enough. For specjbb, however, there 3243 // are occasions when there's lots of live data in the young gen 3244 // and we end up promoting some of it. We don't have a definite 3245 // explanation for why bumping OldPLABSize helps, but the theory 3246 // is that a bigger PLAB results in retaining something like the 3247 // original allocation order after promotion, which improves mutator 3248 // locality. A minor effect may be that larger PLABs reduce the 3249 // number of PLAB allocation events during gc. The value of 8kw 3250 // was arrived at by experimenting with specjbb. 3251 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 3252 3253 // Enable parallel GC and adaptive generation sizing 3254 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 3255 FLAG_SET_DEFAULT(ParallelGCThreads, 3256 Abstract_VM_Version::parallel_worker_threads()); 3257 3258 // Encourage steady state memory management 3259 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 3260 3261 // This appears to improve mutator locality 3262 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 3263 3264 // Get around early Solaris scheduling bug 3265 // (affinity vs other jobs on system) 3266 // but disallow DR and offlining (5008695). 3267 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 3268 3269 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 3270 // and the last option wins. 3271 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 3272 FLAG_SET_CMDLINE(bool, NeverTenure, true); 3273 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 3274 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1); 3275 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 3276 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3277 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 3278 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0); 3279 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 3280 uintx max_tenuring_thresh = 0; 3281 if(!parse_uintx(tail, &max_tenuring_thresh, 0)) { 3282 jio_fprintf(defaultStream::error_stream(), 3283 "Invalid MaxTenuringThreshold: %s\n", option->optionString); 3284 } 3285 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh); 3286 3287 if (MaxTenuringThreshold == 0) { 3288 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3289 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 3290 } else { 3291 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3292 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 3293 } 3294 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 3295 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 3296 jio_fprintf(defaultStream::error_stream(), 3297 "Please use CMSClassUnloadingEnabled in place of " 3298 "CMSPermGenSweepingEnabled in the future\n"); 3299 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 3300 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 3301 jio_fprintf(defaultStream::error_stream(), 3302 "Please use -XX:+UseGCOverheadLimit in place of " 3303 "-XX:+UseGCTimeLimit in the future\n"); 3304 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 3305 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 3306 jio_fprintf(defaultStream::error_stream(), 3307 "Please use -XX:-UseGCOverheadLimit in place of " 3308 "-XX:-UseGCTimeLimit in the future\n"); 3309 // The TLE options are for compatibility with 1.3 and will be 3310 // removed without notice in a future release. These options 3311 // are not to be documented. 3312 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 3313 // No longer used. 3314 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 3315 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 3316 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 3317 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 3318 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 3319 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 3320 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 3321 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 3322 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 3323 // No longer used. 3324 } else if (match_option(option, "-XX:TLESize=", &tail)) { 3325 julong long_tlab_size = 0; 3326 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 3327 if (errcode != arg_in_range) { 3328 jio_fprintf(defaultStream::error_stream(), 3329 "Invalid TLAB size: %s\n", option->optionString); 3330 describe_range_error(errcode); 3331 return JNI_EINVAL; 3332 } 3333 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 3334 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 3335 // No longer used. 3336 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 3337 FLAG_SET_CMDLINE(bool, UseTLAB, true); 3338 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 3339 FLAG_SET_CMDLINE(bool, UseTLAB, false); 3340 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 3341 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 3342 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 3343 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 3344 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 3345 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 3346 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 3347 #if defined(DTRACE_ENABLED) 3348 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 3349 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 3350 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 3351 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 3352 #else // defined(DTRACE_ENABLED) 3353 jio_fprintf(defaultStream::error_stream(), 3354 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 3355 return JNI_EINVAL; 3356 #endif // defined(DTRACE_ENABLED) 3357 #ifdef ASSERT 3358 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { 3359 FLAG_SET_CMDLINE(bool, FullGCALot, true); 3360 // disable scavenge before parallel mark-compact 3361 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 3362 #endif 3363 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { 3364 julong cms_blocks_to_claim = (julong)atol(tail); 3365 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 3366 jio_fprintf(defaultStream::error_stream(), 3367 "Please use -XX:OldPLABSize in place of " 3368 "-XX:CMSParPromoteBlocksToClaim in the future\n"); 3369 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 3370 julong cms_blocks_to_claim = (julong)atol(tail); 3371 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 3372 jio_fprintf(defaultStream::error_stream(), 3373 "Please use -XX:OldPLABSize in place of " 3374 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 3375 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 3376 julong old_plab_size = 0; 3377 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 3378 if (errcode != arg_in_range) { 3379 jio_fprintf(defaultStream::error_stream(), 3380 "Invalid old PLAB size: %s\n", option->optionString); 3381 describe_range_error(errcode); 3382 return JNI_EINVAL; 3383 } 3384 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); 3385 jio_fprintf(defaultStream::error_stream(), 3386 "Please use -XX:OldPLABSize in place of " 3387 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 3388 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 3389 julong young_plab_size = 0; 3390 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 3391 if (errcode != arg_in_range) { 3392 jio_fprintf(defaultStream::error_stream(), 3393 "Invalid young PLAB size: %s\n", option->optionString); 3394 describe_range_error(errcode); 3395 return JNI_EINVAL; 3396 } 3397 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); 3398 jio_fprintf(defaultStream::error_stream(), 3399 "Please use -XX:YoungPLABSize in place of " 3400 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 3401 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || 3402 match_option(option, "-XX:G1MarkStackSize=", &tail)) { 3403 julong stack_size = 0; 3404 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); 3405 if (errcode != arg_in_range) { 3406 jio_fprintf(defaultStream::error_stream(), 3407 "Invalid mark stack size: %s\n", option->optionString); 3408 describe_range_error(errcode); 3409 return JNI_EINVAL; 3410 } 3411 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); 3412 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { 3413 julong max_stack_size = 0; 3414 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); 3415 if (errcode != arg_in_range) { 3416 jio_fprintf(defaultStream::error_stream(), 3417 "Invalid maximum mark stack size: %s\n", 3418 option->optionString); 3419 describe_range_error(errcode); 3420 return JNI_EINVAL; 3421 } 3422 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); 3423 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || 3424 match_option(option, "-XX:ParallelCMSThreads=", &tail)) { 3425 uintx conc_threads = 0; 3426 if (!parse_uintx(tail, &conc_threads, 1)) { 3427 jio_fprintf(defaultStream::error_stream(), 3428 "Invalid concurrent threads: %s\n", option->optionString); 3429 return JNI_EINVAL; 3430 } 3431 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); 3432 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) { 3433 julong max_direct_memory_size = 0; 3434 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0); 3435 if (errcode != arg_in_range) { 3436 jio_fprintf(defaultStream::error_stream(), 3437 "Invalid maximum direct memory size: %s\n", 3438 option->optionString); 3439 describe_range_error(errcode); 3440 return JNI_EINVAL; 3441 } 3442 FLAG_SET_CMDLINE(uintx, MaxDirectMemorySize, max_direct_memory_size); 3443 #if !INCLUDE_MANAGEMENT 3444 } else if (match_option(option, "-XX:+ManagementServer", &tail)) { 3445 jio_fprintf(defaultStream::error_stream(), 3446 "ManagementServer is not supported in this VM.\n"); 3447 return JNI_ERR; 3448 #endif // INCLUDE_MANAGEMENT 3449 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 3450 // Skip -XX:Flags= since that case has already been handled 3451 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 3452 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 3453 return JNI_EINVAL; 3454 } 3455 } 3456 // Unknown option 3457 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 3458 return JNI_ERR; 3459 } 3460 } 3461 3462 // PrintSharedArchiveAndExit will turn on 3463 // -Xshare:on 3464 // -XX:+TraceClassPaths 3465 if (PrintSharedArchiveAndExit) { 3466 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3467 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 3468 FLAG_SET_CMDLINE(bool, TraceClassPaths, true); 3469 } 3470 3471 // Change the default value for flags which have different default values 3472 // when working with older JDKs. 3473 #ifdef LINUX 3474 if (JDK_Version::current().compare_major(6) <= 0 && 3475 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 3476 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 3477 } 3478 #endif // LINUX 3479 fix_appclasspath(); 3480 return JNI_OK; 3481 } 3482 3483 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3484 // 3485 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3486 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3487 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3488 // path is treated as the current directory. 3489 // 3490 // This causes problems with CDS, which requires that all directories specified in the classpath 3491 // must be empty. In most cases, applications do NOT want to load classes from the current 3492 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3493 // scripts compatible with CDS. 3494 void Arguments::fix_appclasspath() { 3495 if (IgnoreEmptyClassPaths) { 3496 const char separator = *os::path_separator(); 3497 const char* src = _java_class_path->value(); 3498 3499 // skip over all the leading empty paths 3500 while (*src == separator) { 3501 src ++; 3502 } 3503 3504 char* copy = AllocateHeap(strlen(src) + 1, mtInternal); 3505 strncpy(copy, src, strlen(src) + 1); 3506 3507 // trim all trailing empty paths 3508 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3509 *tail = '\0'; 3510 } 3511 3512 char from[3] = {separator, separator, '\0'}; 3513 char to [2] = {separator, '\0'}; 3514 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3515 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3516 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3517 } 3518 3519 _java_class_path->set_value(copy); 3520 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3521 } 3522 3523 if (!PrintSharedArchiveAndExit) { 3524 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value()); 3525 } 3526 } 3527 3528 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 3529 // This must be done after all -D arguments have been processed. 3530 scp_p->expand_endorsed(); 3531 3532 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { 3533 // Assemble the bootclasspath elements into the final path. 3534 Arguments::set_sysclasspath(scp_p->combined_path()); 3535 } 3536 3537 // This must be done after all arguments have been processed. 3538 // java_compiler() true means set to "NONE" or empty. 3539 if (java_compiler() && !xdebug_mode()) { 3540 // For backwards compatibility, we switch to interpreted mode if 3541 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3542 // not specified. 3543 set_mode_flags(_int); 3544 } 3545 3546 if ((TieredCompilation && CompileThresholdScaling == 0) 3547 || (!TieredCompilation && get_scaled_compile_threshold(CompileThreshold) == 0)) { 3548 set_mode_flags(_int); 3549 } 3550 3551 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3552 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3553 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3554 } 3555 3556 #ifndef COMPILER2 3557 // Don't degrade server performance for footprint 3558 if (FLAG_IS_DEFAULT(UseLargePages) && 3559 MaxHeapSize < LargePageHeapSizeThreshold) { 3560 // No need for large granularity pages w/small heaps. 3561 // Note that large pages are enabled/disabled for both the 3562 // Java heap and the code cache. 3563 FLAG_SET_DEFAULT(UseLargePages, false); 3564 } 3565 3566 #else 3567 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 3568 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 3569 } 3570 #endif 3571 3572 #ifndef TIERED 3573 // Tiered compilation is undefined. 3574 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation"); 3575 #endif 3576 3577 // If we are running in a headless jre, force java.awt.headless property 3578 // to be true unless the property has already been set. 3579 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. 3580 if (os::is_headless_jre()) { 3581 const char* headless = Arguments::get_property("java.awt.headless"); 3582 if (headless == NULL) { 3583 char envbuffer[128]; 3584 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) { 3585 if (!add_property("java.awt.headless=true")) { 3586 return JNI_ENOMEM; 3587 } 3588 } else { 3589 char buffer[256]; 3590 strcpy(buffer, "java.awt.headless="); 3591 strcat(buffer, envbuffer); 3592 if (!add_property(buffer)) { 3593 return JNI_ENOMEM; 3594 } 3595 } 3596 } 3597 } 3598 3599 if (!ArgumentsExt::check_vm_args_consistency()) { 3600 return JNI_ERR; 3601 } 3602 3603 return JNI_OK; 3604 } 3605 3606 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 3607 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 3608 scp_assembly_required_p); 3609 } 3610 3611 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 3612 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 3613 scp_assembly_required_p); 3614 } 3615 3616 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 3617 const int N_MAX_OPTIONS = 64; 3618 const int OPTION_BUFFER_SIZE = 1024; 3619 char buffer[OPTION_BUFFER_SIZE]; 3620 3621 // The variable will be ignored if it exceeds the length of the buffer. 3622 // Don't check this variable if user has special privileges 3623 // (e.g. unix su command). 3624 if (os::getenv(name, buffer, sizeof(buffer)) && 3625 !os::have_special_privileges()) { 3626 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 3627 jio_fprintf(defaultStream::error_stream(), 3628 "Picked up %s: %s\n", name, buffer); 3629 char* rd = buffer; // pointer to the input string (rd) 3630 int i; 3631 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 3632 while (isspace(*rd)) rd++; // skip whitespace 3633 if (*rd == 0) break; // we re done when the input string is read completely 3634 3635 // The output, option string, overwrites the input string. 3636 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 3637 // input string (rd). 3638 char* wrt = rd; 3639 3640 options[i++].optionString = wrt; // Fill in option 3641 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 3642 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3643 int quote = *rd; // matching quote to look for 3644 rd++; // don't copy open quote 3645 while (*rd != quote) { // include everything (even spaces) up until quote 3646 if (*rd == 0) { // string termination means unmatched string 3647 jio_fprintf(defaultStream::error_stream(), 3648 "Unmatched quote in %s\n", name); 3649 return JNI_ERR; 3650 } 3651 *wrt++ = *rd++; // copy to option string 3652 } 3653 rd++; // don't copy close quote 3654 } else { 3655 *wrt++ = *rd++; // copy to option string 3656 } 3657 } 3658 // Need to check if we're done before writing a NULL, 3659 // because the write could be to the byte that rd is pointing to. 3660 if (*rd++ == 0) { 3661 *wrt = 0; 3662 break; 3663 } 3664 *wrt = 0; // Zero terminate option 3665 } 3666 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 3667 JavaVMInitArgs vm_args; 3668 vm_args.version = JNI_VERSION_1_2; 3669 vm_args.options = options; 3670 vm_args.nOptions = i; 3671 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3672 3673 if (PrintVMOptions) { 3674 const char* tail; 3675 for (int i = 0; i < vm_args.nOptions; i++) { 3676 const JavaVMOption *option = vm_args.options + i; 3677 if (match_option(option, "-XX:", &tail)) { 3678 logOption(tail); 3679 } 3680 } 3681 } 3682 3683 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, Flag::ENVIRON_VAR)); 3684 } 3685 return JNI_OK; 3686 } 3687 3688 void Arguments::set_shared_spaces_flags() { 3689 if (DumpSharedSpaces) { 3690 if (RequireSharedSpaces) { 3691 warning("cannot dump shared archive while using shared archive"); 3692 } 3693 UseSharedSpaces = false; 3694 #ifdef _LP64 3695 if (!UseCompressedOops || !UseCompressedClassPointers) { 3696 vm_exit_during_initialization( 3697 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3698 } 3699 } else { 3700 if (!UseCompressedOops || !UseCompressedClassPointers) { 3701 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3702 } 3703 #endif 3704 } 3705 } 3706 3707 #if !INCLUDE_ALL_GCS 3708 static void force_serial_gc() { 3709 FLAG_SET_DEFAULT(UseSerialGC, true); 3710 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption 3711 UNSUPPORTED_GC_OPTION(UseG1GC); 3712 UNSUPPORTED_GC_OPTION(UseParallelGC); 3713 UNSUPPORTED_GC_OPTION(UseParallelOldGC); 3714 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC); 3715 UNSUPPORTED_GC_OPTION(UseParNewGC); 3716 } 3717 #endif // INCLUDE_ALL_GCS 3718 3719 // Sharing support 3720 // Construct the path to the archive 3721 static char* get_shared_archive_path() { 3722 char *shared_archive_path; 3723 if (SharedArchiveFile == NULL) { 3724 char jvm_path[JVM_MAXPATHLEN]; 3725 os::jvm_path(jvm_path, sizeof(jvm_path)); 3726 char *end = strrchr(jvm_path, *os::file_separator()); 3727 if (end != NULL) *end = '\0'; 3728 size_t jvm_path_len = strlen(jvm_path); 3729 size_t file_sep_len = strlen(os::file_separator()); 3730 shared_archive_path = NEW_C_HEAP_ARRAY(char, jvm_path_len + 3731 file_sep_len + 20, mtInternal); 3732 if (shared_archive_path != NULL) { 3733 strncpy(shared_archive_path, jvm_path, jvm_path_len + 1); 3734 strncat(shared_archive_path, os::file_separator(), file_sep_len); 3735 strncat(shared_archive_path, "classes.jsa", 11); 3736 } 3737 } else { 3738 shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(SharedArchiveFile) + 1, mtInternal); 3739 if (shared_archive_path != NULL) { 3740 strncpy(shared_archive_path, SharedArchiveFile, strlen(SharedArchiveFile) + 1); 3741 } 3742 } 3743 return shared_archive_path; 3744 } 3745 3746 #ifndef PRODUCT 3747 // Determine whether LogVMOutput should be implicitly turned on. 3748 static bool use_vm_log() { 3749 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3750 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3751 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3752 PrintAssembly || TraceDeoptimization || TraceDependencies || 3753 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3754 return true; 3755 } 3756 3757 #ifdef COMPILER1 3758 if (PrintC1Statistics) { 3759 return true; 3760 } 3761 #endif // COMPILER1 3762 3763 #ifdef COMPILER2 3764 if (PrintOptoAssembly || PrintOptoStatistics) { 3765 return true; 3766 } 3767 #endif // COMPILER2 3768 3769 return false; 3770 } 3771 #endif // PRODUCT 3772 3773 // Parse entry point called from JNI_CreateJavaVM 3774 3775 jint Arguments::parse(const JavaVMInitArgs* args) { 3776 3777 // Remaining part of option string 3778 const char* tail; 3779 3780 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 3781 const char* hotspotrc = ".hotspotrc"; 3782 bool settings_file_specified = false; 3783 bool needs_hotspotrc_warning = false; 3784 3785 const char* flags_file; 3786 int index; 3787 for (index = 0; index < args->nOptions; index++) { 3788 const JavaVMOption *option = args->options + index; 3789 if (ArgumentsExt::process_options(option)) { 3790 continue; 3791 } 3792 if (match_option(option, "-XX:Flags=", &tail)) { 3793 flags_file = tail; 3794 settings_file_specified = true; 3795 continue; 3796 } 3797 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 3798 PrintVMOptions = true; 3799 continue; 3800 } 3801 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { 3802 PrintVMOptions = false; 3803 continue; 3804 } 3805 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { 3806 IgnoreUnrecognizedVMOptions = true; 3807 continue; 3808 } 3809 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { 3810 IgnoreUnrecognizedVMOptions = false; 3811 continue; 3812 } 3813 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { 3814 CommandLineFlags::printFlags(tty, false); 3815 vm_exit(0); 3816 } 3817 #if INCLUDE_NMT 3818 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3819 // The launcher did not setup nmt environment variable properly. 3820 if (!MemTracker::check_launcher_nmt_support(tail)) { 3821 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 3822 } 3823 3824 // Verify if nmt option is valid. 3825 if (MemTracker::verify_nmt_option()) { 3826 // Late initialization, still in single-threaded mode. 3827 if (MemTracker::tracking_level() >= NMT_summary) { 3828 MemTracker::init(); 3829 } 3830 } else { 3831 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 3832 } 3833 continue; 3834 } 3835 #endif 3836 3837 3838 #ifndef PRODUCT 3839 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) { 3840 CommandLineFlags::printFlags(tty, true); 3841 vm_exit(0); 3842 } 3843 #endif 3844 } 3845 3846 if (IgnoreUnrecognizedVMOptions) { 3847 // uncast const to modify the flag args->ignoreUnrecognized 3848 *(jboolean*)(&args->ignoreUnrecognized) = true; 3849 } 3850 3851 // Parse specified settings file 3852 if (settings_file_specified) { 3853 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { 3854 return JNI_EINVAL; 3855 } 3856 } else { 3857 #ifdef ASSERT 3858 // Parse default .hotspotrc settings file 3859 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 3860 return JNI_EINVAL; 3861 } 3862 #else 3863 struct stat buf; 3864 if (os::stat(hotspotrc, &buf) == 0) { 3865 needs_hotspotrc_warning = true; 3866 } 3867 #endif 3868 } 3869 3870 if (PrintVMOptions) { 3871 for (index = 0; index < args->nOptions; index++) { 3872 const JavaVMOption *option = args->options + index; 3873 if (match_option(option, "-XX:", &tail)) { 3874 logOption(tail); 3875 } 3876 } 3877 } 3878 3879 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 3880 jint result = parse_vm_init_args(args); 3881 if (result != JNI_OK) { 3882 return result; 3883 } 3884 3885 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 3886 SharedArchivePath = get_shared_archive_path(); 3887 if (SharedArchivePath == NULL) { 3888 return JNI_ENOMEM; 3889 } 3890 3891 // Set up VerifySharedSpaces 3892 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 3893 VerifySharedSpaces = true; 3894 } 3895 3896 // Delay warning until here so that we've had a chance to process 3897 // the -XX:-PrintWarnings flag 3898 if (needs_hotspotrc_warning) { 3899 warning("%s file is present but has been ignored. " 3900 "Run with -XX:Flags=%s to load the file.", 3901 hotspotrc, hotspotrc); 3902 } 3903 3904 #ifdef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. 3905 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages"); 3906 #endif 3907 3908 #if INCLUDE_ALL_GCS 3909 #if (defined JAVASE_EMBEDDED || defined ARM) 3910 UNSUPPORTED_OPTION(UseG1GC, "G1 GC"); 3911 #endif 3912 #endif 3913 3914 #ifndef PRODUCT 3915 if (TraceBytecodesAt != 0) { 3916 TraceBytecodes = true; 3917 } 3918 if (CountCompiledCalls) { 3919 if (UseCounterDecay) { 3920 warning("UseCounterDecay disabled because CountCalls is set"); 3921 UseCounterDecay = false; 3922 } 3923 } 3924 #endif // PRODUCT 3925 3926 if (ScavengeRootsInCode == 0) { 3927 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 3928 warning("forcing ScavengeRootsInCode non-zero"); 3929 } 3930 ScavengeRootsInCode = 1; 3931 } 3932 3933 if (PrintGCDetails) { 3934 // Turn on -verbose:gc options as well 3935 PrintGC = true; 3936 } 3937 3938 // Set object alignment values. 3939 set_object_alignment(); 3940 3941 #if !INCLUDE_ALL_GCS 3942 force_serial_gc(); 3943 #endif // INCLUDE_ALL_GCS 3944 #if !INCLUDE_CDS 3945 if (DumpSharedSpaces || RequireSharedSpaces) { 3946 jio_fprintf(defaultStream::error_stream(), 3947 "Shared spaces are not supported in this VM\n"); 3948 return JNI_ERR; 3949 } 3950 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) { 3951 warning("Shared spaces are not supported in this VM"); 3952 FLAG_SET_DEFAULT(UseSharedSpaces, false); 3953 FLAG_SET_DEFAULT(PrintSharedSpaces, false); 3954 } 3955 no_shared_spaces("CDS Disabled"); 3956 #endif // INCLUDE_CDS 3957 3958 return JNI_OK; 3959 } 3960 3961 jint Arguments::apply_ergo() { 3962 3963 // Set flags based on ergonomics. 3964 set_ergonomics_flags(); 3965 3966 set_shared_spaces_flags(); 3967 3968 // Check the GC selections again. 3969 if (!ArgumentsExt::check_gc_consistency_ergo()) { 3970 return JNI_EINVAL; 3971 } 3972 3973 if (TieredCompilation) { 3974 set_tiered_flags(); 3975 } else { 3976 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup. 3977 if (CompilationPolicyChoice >= 2) { 3978 vm_exit_during_initialization( 3979 "Incompatible compilation policy selected", NULL); 3980 } 3981 // Scale CompileThreshold 3982 if (!FLAG_IS_DEFAULT(CompileThresholdScaling)) { 3983 FLAG_SET_ERGO(intx, CompileThreshold, get_scaled_compile_threshold(CompileThreshold)); 3984 } 3985 } 3986 3987 #ifdef COMPILER2 3988 #ifndef PRODUCT 3989 if (PrintIdealGraphLevel > 0) { 3990 FLAG_SET_ERGO(bool, PrintIdealGraph, true); 3991 } 3992 #endif 3993 #endif 3994 3995 // Set NmethodSweepFraction after the size of the code cache is adapted (in case of tiered) 3996 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { 3997 FLAG_SET_DEFAULT(NmethodSweepFraction, 1 + ReservedCodeCacheSize / (16 * M)); 3998 } 3999 4000 4001 // Set heap size based on available physical memory 4002 set_heap_size(); 4003 4004 set_gc_specific_flags(); 4005 4006 // Initialize Metaspace flags and alignments 4007 Metaspace::ergo_initialize(); 4008 4009 // Set bytecode rewriting flags 4010 set_bytecode_flags(); 4011 4012 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 4013 set_aggressive_opts_flags(); 4014 4015 // Turn off biased locking for locking debug mode flags, 4016 // which are subtly different from each other but neither works with 4017 // biased locking 4018 if (UseHeavyMonitors 4019 #ifdef COMPILER1 4020 || !UseFastLocking 4021 #endif // COMPILER1 4022 ) { 4023 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 4024 // flag set to true on command line; warn the user that they 4025 // can't enable biased locking here 4026 warning("Biased Locking is not supported with locking debug flags" 4027 "; ignoring UseBiasedLocking flag." ); 4028 } 4029 UseBiasedLocking = false; 4030 } 4031 4032 #ifdef ZERO 4033 // Clear flags not supported on zero. 4034 FLAG_SET_DEFAULT(ProfileInterpreter, false); 4035 FLAG_SET_DEFAULT(UseBiasedLocking, false); 4036 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 4037 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 4038 #endif // CC_INTERP 4039 4040 #ifdef COMPILER2 4041 if (!EliminateLocks) { 4042 EliminateNestedLocks = false; 4043 } 4044 if (!Inline) { 4045 IncrementalInline = false; 4046 } 4047 #ifndef PRODUCT 4048 if (!IncrementalInline) { 4049 AlwaysIncrementalInline = false; 4050 } 4051 #endif 4052 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { 4053 // nothing to use the profiling, turn if off 4054 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 4055 } 4056 #endif 4057 4058 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 4059 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 4060 DebugNonSafepoints = true; 4061 } 4062 4063 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 4064 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 4065 } 4066 4067 #ifndef PRODUCT 4068 if (CompileTheWorld) { 4069 // Force NmethodSweeper to sweep whole CodeCache each time. 4070 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { 4071 NmethodSweepFraction = 1; 4072 } 4073 } 4074 4075 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 4076 if (use_vm_log()) { 4077 LogVMOutput = true; 4078 } 4079 } 4080 #endif // PRODUCT 4081 4082 if (PrintCommandLineFlags) { 4083 CommandLineFlags::printSetFlags(tty); 4084 } 4085 4086 // Apply CPU specific policy for the BiasedLocking 4087 if (UseBiasedLocking) { 4088 if (!VM_Version::use_biased_locking() && 4089 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 4090 UseBiasedLocking = false; 4091 } 4092 } 4093 #ifdef COMPILER2 4094 if (!UseBiasedLocking || EmitSync != 0) { 4095 UseOptoBiasInlining = false; 4096 } 4097 #endif 4098 4099 return JNI_OK; 4100 } 4101 4102 jint Arguments::adjust_after_os() { 4103 if (UseNUMA) { 4104 if (UseParallelGC || UseParallelOldGC) { 4105 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4106 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4107 } 4108 } 4109 // UseNUMAInterleaving is set to ON for all collectors and 4110 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4111 // such as the parallel collector for Linux and Solaris will 4112 // interleave old gen and survivor spaces on top of NUMA 4113 // allocation policy for the eden space. 4114 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4115 // all platforms and ParallelGC on Windows will interleave all 4116 // of the heap spaces across NUMA nodes. 4117 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4118 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4119 } 4120 } 4121 return JNI_OK; 4122 } 4123 4124 int Arguments::PropertyList_count(SystemProperty* pl) { 4125 int count = 0; 4126 while(pl != NULL) { 4127 count++; 4128 pl = pl->next(); 4129 } 4130 return count; 4131 } 4132 4133 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4134 assert(key != NULL, "just checking"); 4135 SystemProperty* prop; 4136 for (prop = pl; prop != NULL; prop = prop->next()) { 4137 if (strcmp(key, prop->key()) == 0) return prop->value(); 4138 } 4139 return NULL; 4140 } 4141 4142 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4143 int count = 0; 4144 const char* ret_val = NULL; 4145 4146 while(pl != NULL) { 4147 if(count >= index) { 4148 ret_val = pl->key(); 4149 break; 4150 } 4151 count++; 4152 pl = pl->next(); 4153 } 4154 4155 return ret_val; 4156 } 4157 4158 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4159 int count = 0; 4160 char* ret_val = NULL; 4161 4162 while(pl != NULL) { 4163 if(count >= index) { 4164 ret_val = pl->value(); 4165 break; 4166 } 4167 count++; 4168 pl = pl->next(); 4169 } 4170 4171 return ret_val; 4172 } 4173 4174 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4175 SystemProperty* p = *plist; 4176 if (p == NULL) { 4177 *plist = new_p; 4178 } else { 4179 while (p->next() != NULL) { 4180 p = p->next(); 4181 } 4182 p->set_next(new_p); 4183 } 4184 } 4185 4186 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 4187 if (plist == NULL) 4188 return; 4189 4190 SystemProperty* new_p = new SystemProperty(k, v, true); 4191 PropertyList_add(plist, new_p); 4192 } 4193 4194 // This add maintains unique property key in the list. 4195 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { 4196 if (plist == NULL) 4197 return; 4198 4199 // If property key exist then update with new value. 4200 SystemProperty* prop; 4201 for (prop = *plist; prop != NULL; prop = prop->next()) { 4202 if (strcmp(k, prop->key()) == 0) { 4203 if (append) { 4204 prop->append_value(v); 4205 } else { 4206 prop->set_value(v); 4207 } 4208 return; 4209 } 4210 } 4211 4212 PropertyList_add(plist, k, v); 4213 } 4214 4215 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4216 // Returns true if all of the source pointed by src has been copied over to 4217 // the destination buffer pointed by buf. Otherwise, returns false. 4218 // Notes: 4219 // 1. If the length (buflen) of the destination buffer excluding the 4220 // NULL terminator character is not long enough for holding the expanded 4221 // pid characters, it also returns false instead of returning the partially 4222 // expanded one. 4223 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4224 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4225 char* buf, size_t buflen) { 4226 const char* p = src; 4227 char* b = buf; 4228 const char* src_end = &src[srclen]; 4229 char* buf_end = &buf[buflen - 1]; 4230 4231 while (p < src_end && b < buf_end) { 4232 if (*p == '%') { 4233 switch (*(++p)) { 4234 case '%': // "%%" ==> "%" 4235 *b++ = *p++; 4236 break; 4237 case 'p': { // "%p" ==> current process id 4238 // buf_end points to the character before the last character so 4239 // that we could write '\0' to the end of the buffer. 4240 size_t buf_sz = buf_end - b + 1; 4241 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4242 4243 // if jio_snprintf fails or the buffer is not long enough to hold 4244 // the expanded pid, returns false. 4245 if (ret < 0 || ret >= (int)buf_sz) { 4246 return false; 4247 } else { 4248 b += ret; 4249 assert(*b == '\0', "fail in copy_expand_pid"); 4250 if (p == src_end && b == buf_end + 1) { 4251 // reach the end of the buffer. 4252 return true; 4253 } 4254 } 4255 p++; 4256 break; 4257 } 4258 default : 4259 *b++ = '%'; 4260 } 4261 } else { 4262 *b++ = *p++; 4263 } 4264 } 4265 *b = '\0'; 4266 return (p == src_end); // return false if not all of the source was copied 4267 }