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, 1165 MIN2(CODE_CACHE_SIZE_LIMIT, ReservedCodeCacheSize * 5)); 1166 } 1167 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M 1168 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { 1169 FLAG_SET_ERGO(bool, SegmentedCodeCache, true); 1170 1171 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { 1172 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap) 1173 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) { 1174 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1175 } 1176 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) { 1177 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2); 1178 } 1179 // Check consistency of code heap sizes 1180 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 1181 jio_fprintf(defaultStream::error_stream(), 1182 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 1183 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 1184 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 1185 vm_exit(1); 1186 } 1187 } 1188 } 1189 if (!UseInterpreter) { // -Xcomp 1190 Tier3InvokeNotifyFreqLog = 0; 1191 Tier4InvocationThreshold = 0; 1192 } 1193 // Scale tiered compilation thresholds 1194 if (!FLAG_IS_DEFAULT(CompileThresholdScaling)) { 1195 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, get_scaled_freq_log(Tier0InvokeNotifyFreqLog)); 1196 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, get_scaled_freq_log(Tier0BackedgeNotifyFreqLog)); 1197 1198 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, get_scaled_compile_threshold(Tier3InvocationThreshold)); 1199 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, get_scaled_compile_threshold(Tier3MinInvocationThreshold)); 1200 FLAG_SET_ERGO(intx, Tier3CompileThreshold, get_scaled_compile_threshold(Tier3CompileThreshold)); 1201 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, get_scaled_compile_threshold(Tier3BackEdgeThreshold)); 1202 1203 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here 1204 // once these thresholds become supported. 1205 1206 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, get_scaled_freq_log(Tier2InvokeNotifyFreqLog)); 1207 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, get_scaled_freq_log(Tier2BackedgeNotifyFreqLog)); 1208 1209 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, get_scaled_freq_log(Tier3InvokeNotifyFreqLog)); 1210 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, get_scaled_freq_log(Tier3BackedgeNotifyFreqLog)); 1211 1212 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, get_scaled_freq_log(Tier23InlineeNotifyFreqLog)); 1213 1214 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, get_scaled_compile_threshold(Tier4InvocationThreshold)); 1215 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, get_scaled_compile_threshold(Tier4MinInvocationThreshold)); 1216 FLAG_SET_ERGO(intx, Tier4CompileThreshold, get_scaled_compile_threshold(Tier4CompileThreshold)); 1217 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, get_scaled_compile_threshold(Tier4BackEdgeThreshold)); 1218 } 1219 } 1220 1221 /** 1222 * Returns the minimum number of compiler threads needed to run the JVM. The following 1223 * configurations are possible. 1224 * 1225 * 1) The JVM is build using an interpreter only. As a result, the minimum number of 1226 * compiler threads is 0. 1227 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As 1228 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1. 1229 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However, 1230 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only 1231 * C1 can be used, so the minimum number of compiler threads is 1. 1232 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option 1233 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result, 1234 * the minimum number of compiler threads is 2. 1235 */ 1236 int Arguments::get_min_number_of_compiler_threads() { 1237 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 1238 return 0; // case 1 1239 #else 1240 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) { 1241 return 1; // case 2 or case 3 1242 } 1243 return 2; // case 4 (tiered) 1244 #endif 1245 } 1246 1247 #if INCLUDE_ALL_GCS 1248 static void disable_adaptive_size_policy(const char* collector_name) { 1249 if (UseAdaptiveSizePolicy) { 1250 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) { 1251 warning("disabling UseAdaptiveSizePolicy; it is incompatible with %s.", 1252 collector_name); 1253 } 1254 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); 1255 } 1256 } 1257 1258 void Arguments::set_parnew_gc_flags() { 1259 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, 1260 "control point invariant"); 1261 assert(UseParNewGC, "Error"); 1262 1263 // Turn off AdaptiveSizePolicy for parnew until it is complete. 1264 disable_adaptive_size_policy("UseParNewGC"); 1265 1266 if (FLAG_IS_DEFAULT(ParallelGCThreads)) { 1267 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1268 assert(ParallelGCThreads > 0, "We should always have at least one thread by default"); 1269 } else if (ParallelGCThreads == 0) { 1270 jio_fprintf(defaultStream::error_stream(), 1271 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n"); 1272 vm_exit(1); 1273 } 1274 1275 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, 1276 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration 1277 // we set them to 1024 and 1024. 1278 // See CR 6362902. 1279 if (FLAG_IS_DEFAULT(YoungPLABSize)) { 1280 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); 1281 } 1282 if (FLAG_IS_DEFAULT(OldPLABSize)) { 1283 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); 1284 } 1285 1286 // When using compressed oops, we use local overflow stacks, 1287 // rather than using a global overflow list chained through 1288 // the klass word of the object's pre-image. 1289 if (UseCompressedOops && !ParGCUseLocalOverflow) { 1290 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { 1291 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); 1292 } 1293 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); 1294 } 1295 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); 1296 } 1297 1298 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on 1299 // sparc/solaris for certain applications, but would gain from 1300 // further optimization and tuning efforts, and would almost 1301 // certainly gain from analysis of platform and environment. 1302 void Arguments::set_cms_and_parnew_gc_flags() { 1303 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); 1304 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); 1305 1306 // If we are using CMS, we prefer to UseParNewGC, 1307 // unless explicitly forbidden. 1308 if (FLAG_IS_DEFAULT(UseParNewGC)) { 1309 FLAG_SET_ERGO(bool, UseParNewGC, true); 1310 } 1311 1312 // Turn off AdaptiveSizePolicy by default for cms until it is complete. 1313 disable_adaptive_size_policy("UseConcMarkSweepGC"); 1314 1315 // In either case, adjust ParallelGCThreads and/or UseParNewGC 1316 // as needed. 1317 if (UseParNewGC) { 1318 set_parnew_gc_flags(); 1319 } 1320 1321 size_t max_heap = align_size_down(MaxHeapSize, 1322 CardTableRS::ct_max_alignment_constraint()); 1323 1324 // Now make adjustments for CMS 1325 intx tenuring_default = (intx)6; 1326 size_t young_gen_per_worker = CMSYoungGenPerWorker; 1327 1328 // Preferred young gen size for "short" pauses: 1329 // upper bound depends on # of threads and NewRatio. 1330 const uintx parallel_gc_threads = 1331 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); 1332 const size_t preferred_max_new_size_unaligned = 1333 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * parallel_gc_threads)); 1334 size_t preferred_max_new_size = 1335 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); 1336 1337 // Unless explicitly requested otherwise, size young gen 1338 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads 1339 1340 // If either MaxNewSize or NewRatio is set on the command line, 1341 // assume the user is trying to set the size of the young gen. 1342 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { 1343 1344 // Set MaxNewSize to our calculated preferred_max_new_size unless 1345 // NewSize was set on the command line and it is larger than 1346 // preferred_max_new_size. 1347 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line 1348 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); 1349 } else { 1350 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); 1351 } 1352 if (PrintGCDetails && Verbose) { 1353 // Too early to use gclog_or_tty 1354 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); 1355 } 1356 1357 // Code along this path potentially sets NewSize and OldSize 1358 if (PrintGCDetails && Verbose) { 1359 // Too early to use gclog_or_tty 1360 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT 1361 " initial_heap_size: " SIZE_FORMAT 1362 " max_heap: " SIZE_FORMAT, 1363 min_heap_size(), InitialHeapSize, max_heap); 1364 } 1365 size_t min_new = preferred_max_new_size; 1366 if (FLAG_IS_CMDLINE(NewSize)) { 1367 min_new = NewSize; 1368 } 1369 if (max_heap > min_new && min_heap_size() > min_new) { 1370 // Unless explicitly requested otherwise, make young gen 1371 // at least min_new, and at most preferred_max_new_size. 1372 if (FLAG_IS_DEFAULT(NewSize)) { 1373 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); 1374 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); 1375 if (PrintGCDetails && Verbose) { 1376 // Too early to use gclog_or_tty 1377 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize); 1378 } 1379 } 1380 // Unless explicitly requested otherwise, size old gen 1381 // so it's NewRatio x of NewSize. 1382 if (FLAG_IS_DEFAULT(OldSize)) { 1383 if (max_heap > NewSize) { 1384 FLAG_SET_ERGO(uintx, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize)); 1385 if (PrintGCDetails && Verbose) { 1386 // Too early to use gclog_or_tty 1387 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize); 1388 } 1389 } 1390 } 1391 } 1392 } 1393 // Unless explicitly requested otherwise, definitely 1394 // promote all objects surviving "tenuring_default" scavenges. 1395 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && 1396 FLAG_IS_DEFAULT(SurvivorRatio)) { 1397 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default); 1398 } 1399 // If we decided above (or user explicitly requested) 1400 // `promote all' (via MaxTenuringThreshold := 0), 1401 // prefer minuscule survivor spaces so as not to waste 1402 // space for (non-existent) survivors 1403 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { 1404 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio)); 1405 } 1406 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, 1407 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. 1408 // This is done in order to make ParNew+CMS configuration to work 1409 // with YoungPLABSize and OldPLABSize options. 1410 // See CR 6362902. 1411 if (!FLAG_IS_DEFAULT(OldPLABSize)) { 1412 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1413 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim 1414 // is. In this situation let CMSParPromoteBlocksToClaim follow 1415 // the value (either from the command line or ergonomics) of 1416 // OldPLABSize. Following OldPLABSize is an ergonomics decision. 1417 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); 1418 } else { 1419 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. 1420 // CMSParPromoteBlocksToClaim is a collector-specific flag, so 1421 // we'll let it to take precedence. 1422 jio_fprintf(defaultStream::error_stream(), 1423 "Both OldPLABSize and CMSParPromoteBlocksToClaim" 1424 " options are specified for the CMS collector." 1425 " CMSParPromoteBlocksToClaim will take precedence.\n"); 1426 } 1427 } 1428 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { 1429 // OldPLAB sizing manually turned off: Use a larger default setting, 1430 // unless it was manually specified. This is because a too-low value 1431 // will slow down scavenges. 1432 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { 1433 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 1434 } 1435 } 1436 // Overwrite OldPLABSize which is the variable we will internally use everywhere. 1437 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); 1438 // If either of the static initialization defaults have changed, note this 1439 // modification. 1440 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { 1441 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); 1442 } 1443 if (PrintGCDetails && Verbose) { 1444 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1445 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1446 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads); 1447 } 1448 } 1449 #endif // INCLUDE_ALL_GCS 1450 1451 void set_object_alignment() { 1452 // Object alignment. 1453 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); 1454 MinObjAlignmentInBytes = ObjectAlignmentInBytes; 1455 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); 1456 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; 1457 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); 1458 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; 1459 1460 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); 1461 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; 1462 1463 // Oop encoding heap max 1464 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; 1465 1466 #if INCLUDE_ALL_GCS 1467 // Set CMS global values 1468 CompactibleFreeListSpace::set_cms_values(); 1469 #endif // INCLUDE_ALL_GCS 1470 } 1471 1472 bool verify_object_alignment() { 1473 // Object alignment. 1474 if (!is_power_of_2(ObjectAlignmentInBytes)) { 1475 jio_fprintf(defaultStream::error_stream(), 1476 "error: ObjectAlignmentInBytes=%d must be power of 2\n", 1477 (int)ObjectAlignmentInBytes); 1478 return false; 1479 } 1480 if ((int)ObjectAlignmentInBytes < BytesPerLong) { 1481 jio_fprintf(defaultStream::error_stream(), 1482 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n", 1483 (int)ObjectAlignmentInBytes, BytesPerLong); 1484 return false; 1485 } 1486 // It does not make sense to have big object alignment 1487 // since a space lost due to alignment will be greater 1488 // then a saved space from compressed oops. 1489 if ((int)ObjectAlignmentInBytes > 256) { 1490 jio_fprintf(defaultStream::error_stream(), 1491 "error: ObjectAlignmentInBytes=%d must not be greater than 256\n", 1492 (int)ObjectAlignmentInBytes); 1493 return false; 1494 } 1495 // In case page size is very small. 1496 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) { 1497 jio_fprintf(defaultStream::error_stream(), 1498 "error: ObjectAlignmentInBytes=%d must be less than page size %d\n", 1499 (int)ObjectAlignmentInBytes, os::vm_page_size()); 1500 return false; 1501 } 1502 if(SurvivorAlignmentInBytes == 0) { 1503 SurvivorAlignmentInBytes = ObjectAlignmentInBytes; 1504 } else { 1505 if (!is_power_of_2(SurvivorAlignmentInBytes)) { 1506 jio_fprintf(defaultStream::error_stream(), 1507 "error: SurvivorAlignmentInBytes=%d must be power of 2\n", 1508 (int)SurvivorAlignmentInBytes); 1509 return false; 1510 } 1511 if (SurvivorAlignmentInBytes < ObjectAlignmentInBytes) { 1512 jio_fprintf(defaultStream::error_stream(), 1513 "error: SurvivorAlignmentInBytes=%d must be greater than ObjectAlignmentInBytes=%d \n", 1514 (int)SurvivorAlignmentInBytes, (int)ObjectAlignmentInBytes); 1515 return false; 1516 } 1517 } 1518 return true; 1519 } 1520 1521 size_t Arguments::max_heap_for_compressed_oops() { 1522 // Avoid sign flip. 1523 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size"); 1524 // We need to fit both the NULL page and the heap into the memory budget, while 1525 // keeping alignment constraints of the heap. To guarantee the latter, as the 1526 // NULL page is located before the heap, we pad the NULL page to the conservative 1527 // maximum alignment that the GC may ever impose upon the heap. 1528 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(), 1529 _conservative_max_heap_alignment); 1530 1531 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); 1532 NOT_LP64(ShouldNotReachHere(); return 0); 1533 } 1534 1535 bool Arguments::should_auto_select_low_pause_collector() { 1536 if (UseAutoGCSelectPolicy && 1537 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && 1538 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { 1539 if (PrintGCDetails) { 1540 // Cannot use gclog_or_tty yet. 1541 tty->print_cr("Automatic selection of the low pause collector" 1542 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis); 1543 } 1544 return true; 1545 } 1546 return false; 1547 } 1548 1549 void Arguments::set_use_compressed_oops() { 1550 #ifndef ZERO 1551 #ifdef _LP64 1552 // MaxHeapSize is not set up properly at this point, but 1553 // the only value that can override MaxHeapSize if we are 1554 // to use UseCompressedOops is InitialHeapSize. 1555 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); 1556 1557 if (max_heap_size <= max_heap_for_compressed_oops()) { 1558 #if !defined(COMPILER1) || defined(TIERED) 1559 if (FLAG_IS_DEFAULT(UseCompressedOops)) { 1560 FLAG_SET_ERGO(bool, UseCompressedOops, true); 1561 } 1562 #endif 1563 #ifdef _WIN64 1564 if (UseLargePages && UseCompressedOops) { 1565 // Cannot allocate guard pages for implicit checks in indexed addressing 1566 // mode, when large pages are specified on windows. 1567 // This flag could be switched ON if narrow oop base address is set to 0, 1568 // see code in Universe::initialize_heap(). 1569 Universe::set_narrow_oop_use_implicit_null_checks(false); 1570 } 1571 #endif // _WIN64 1572 } else { 1573 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { 1574 warning("Max heap size too large for Compressed Oops"); 1575 FLAG_SET_DEFAULT(UseCompressedOops, false); 1576 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1577 } 1578 } 1579 #endif // _LP64 1580 #endif // ZERO 1581 } 1582 1583 1584 // NOTE: set_use_compressed_klass_ptrs() must be called after calling 1585 // set_use_compressed_oops(). 1586 void Arguments::set_use_compressed_klass_ptrs() { 1587 #ifndef ZERO 1588 #ifdef _LP64 1589 // UseCompressedOops must be on for UseCompressedClassPointers to be on. 1590 if (!UseCompressedOops) { 1591 if (UseCompressedClassPointers) { 1592 warning("UseCompressedClassPointers requires UseCompressedOops"); 1593 } 1594 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1595 } else { 1596 // Turn on UseCompressedClassPointers too 1597 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { 1598 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); 1599 } 1600 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. 1601 if (UseCompressedClassPointers) { 1602 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { 1603 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); 1604 FLAG_SET_DEFAULT(UseCompressedClassPointers, false); 1605 } 1606 } 1607 } 1608 #endif // _LP64 1609 #endif // !ZERO 1610 } 1611 1612 void Arguments::set_conservative_max_heap_alignment() { 1613 // The conservative maximum required alignment for the heap is the maximum of 1614 // the alignments imposed by several sources: any requirements from the heap 1615 // itself, the collector policy and the maximum page size we may run the VM 1616 // with. 1617 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment(); 1618 #if INCLUDE_ALL_GCS 1619 if (UseParallelGC) { 1620 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment(); 1621 } else if (UseG1GC) { 1622 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment(); 1623 } 1624 #endif // INCLUDE_ALL_GCS 1625 _conservative_max_heap_alignment = MAX4(heap_alignment, 1626 (size_t)os::vm_allocation_granularity(), 1627 os::max_page_size(), 1628 CollectorPolicy::compute_heap_alignment()); 1629 } 1630 1631 void Arguments::select_gc_ergonomically() { 1632 if (os::is_server_class_machine()) { 1633 if (should_auto_select_low_pause_collector()) { 1634 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); 1635 } else { 1636 FLAG_SET_ERGO(bool, UseParallelGC, true); 1637 } 1638 } 1639 } 1640 1641 void Arguments::select_gc() { 1642 if (!gc_selected()) { 1643 ArgumentsExt::select_gc_ergonomically(); 1644 } 1645 } 1646 1647 void Arguments::set_ergonomics_flags() { 1648 select_gc(); 1649 1650 #ifdef COMPILER2 1651 // Shared spaces work fine with other GCs but causes bytecode rewriting 1652 // to be disabled, which hurts interpreter performance and decreases 1653 // server performance. When -server is specified, keep the default off 1654 // unless it is asked for. Future work: either add bytecode rewriting 1655 // at link time, or rewrite bytecodes in non-shared methods. 1656 if (!DumpSharedSpaces && !RequireSharedSpaces && 1657 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { 1658 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); 1659 } 1660 #endif 1661 1662 set_conservative_max_heap_alignment(); 1663 1664 #ifndef ZERO 1665 #ifdef _LP64 1666 set_use_compressed_oops(); 1667 1668 // set_use_compressed_klass_ptrs() must be called after calling 1669 // set_use_compressed_oops(). 1670 set_use_compressed_klass_ptrs(); 1671 1672 // Also checks that certain machines are slower with compressed oops 1673 // in vm_version initialization code. 1674 #endif // _LP64 1675 #endif // !ZERO 1676 } 1677 1678 void Arguments::set_parallel_gc_flags() { 1679 assert(UseParallelGC || UseParallelOldGC, "Error"); 1680 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file). 1681 if (FLAG_IS_DEFAULT(UseParallelOldGC)) { 1682 FLAG_SET_DEFAULT(UseParallelOldGC, true); 1683 } 1684 FLAG_SET_DEFAULT(UseParallelGC, true); 1685 1686 // If no heap maximum was requested explicitly, use some reasonable fraction 1687 // of the physical memory, up to a maximum of 1GB. 1688 FLAG_SET_DEFAULT(ParallelGCThreads, 1689 Abstract_VM_Version::parallel_worker_threads()); 1690 if (ParallelGCThreads == 0) { 1691 jio_fprintf(defaultStream::error_stream(), 1692 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n"); 1693 vm_exit(1); 1694 } 1695 1696 if (UseAdaptiveSizePolicy) { 1697 // We don't want to limit adaptive heap sizing's freedom to adjust the heap 1698 // unless the user actually sets these flags. 1699 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) { 1700 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0); 1701 _min_heap_free_ratio = MinHeapFreeRatio; 1702 } 1703 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) { 1704 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100); 1705 _max_heap_free_ratio = MaxHeapFreeRatio; 1706 } 1707 } 1708 1709 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the 1710 // SurvivorRatio has been set, reset their default values to SurvivorRatio + 1711 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. 1712 // See CR 6362902 for details. 1713 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { 1714 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { 1715 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); 1716 } 1717 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { 1718 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); 1719 } 1720 } 1721 1722 if (UseParallelOldGC) { 1723 // Par compact uses lower default values since they are treated as 1724 // minimums. These are different defaults because of the different 1725 // interpretation and are not ergonomically set. 1726 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { 1727 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); 1728 } 1729 } 1730 } 1731 1732 void Arguments::set_g1_gc_flags() { 1733 assert(UseG1GC, "Error"); 1734 #ifdef COMPILER1 1735 FastTLABRefill = false; 1736 #endif 1737 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); 1738 if (ParallelGCThreads == 0) { 1739 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0."); 1740 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL); 1741 } 1742 1743 #if INCLUDE_ALL_GCS 1744 if (G1ConcRefinementThreads == 0) { 1745 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads); 1746 } 1747 #endif 1748 1749 // MarkStackSize will be set (if it hasn't been set by the user) 1750 // when concurrent marking is initialized. 1751 // Its value will be based upon the number of parallel marking threads. 1752 // But we do set the maximum mark stack size here. 1753 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) { 1754 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE); 1755 } 1756 1757 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { 1758 // In G1, we want the default GC overhead goal to be higher than 1759 // say in PS. So we set it here to 10%. Otherwise the heap might 1760 // be expanded more aggressively than we would like it to. In 1761 // fact, even 10% seems to not be high enough in some cases 1762 // (especially small GC stress tests that the main thing they do 1763 // is allocation). We might consider increase it further. 1764 FLAG_SET_DEFAULT(GCTimeRatio, 9); 1765 } 1766 1767 if (PrintGCDetails && Verbose) { 1768 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", 1769 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); 1770 tty->print_cr("ConcGCThreads: %u", (uint) ConcGCThreads); 1771 } 1772 } 1773 1774 #if !INCLUDE_ALL_GCS 1775 #ifdef ASSERT 1776 static bool verify_serial_gc_flags() { 1777 return (UseSerialGC && 1778 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || 1779 UseParallelGC || UseParallelOldGC)); 1780 } 1781 #endif // ASSERT 1782 #endif // INCLUDE_ALL_GCS 1783 1784 void Arguments::set_gc_specific_flags() { 1785 #if INCLUDE_ALL_GCS 1786 // Set per-collector flags 1787 if (UseParallelGC || UseParallelOldGC) { 1788 set_parallel_gc_flags(); 1789 } else if (UseConcMarkSweepGC) { // Should be done before ParNew check below 1790 set_cms_and_parnew_gc_flags(); 1791 } else if (UseParNewGC) { // Skipped if CMS is set above 1792 set_parnew_gc_flags(); 1793 } else if (UseG1GC) { 1794 set_g1_gc_flags(); 1795 } 1796 check_deprecated_gcs(); 1797 check_deprecated_gc_flags(); 1798 if (AssumeMP && !UseSerialGC) { 1799 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { 1800 warning("If the number of processors is expected to increase from one, then" 1801 " you should configure the number of parallel GC threads appropriately" 1802 " using -XX:ParallelGCThreads=N"); 1803 } 1804 } 1805 if (MinHeapFreeRatio == 100) { 1806 // Keeping the heap 100% free is hard ;-) so limit it to 99%. 1807 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99); 1808 } 1809 #else // INCLUDE_ALL_GCS 1810 assert(verify_serial_gc_flags(), "SerialGC unset"); 1811 #endif // INCLUDE_ALL_GCS 1812 } 1813 1814 julong Arguments::limit_by_allocatable_memory(julong limit) { 1815 julong max_allocatable; 1816 julong result = limit; 1817 if (os::has_allocatable_memory_limit(&max_allocatable)) { 1818 result = MIN2(result, max_allocatable / MaxVirtMemFraction); 1819 } 1820 return result; 1821 } 1822 1823 // Use static initialization to get the default before parsing 1824 static const uintx DefaultHeapBaseMinAddress = HeapBaseMinAddress; 1825 1826 void Arguments::set_heap_size() { 1827 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { 1828 // Deprecated flag 1829 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); 1830 } 1831 1832 const julong phys_mem = 1833 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) 1834 : (julong)MaxRAM; 1835 1836 // If the maximum heap size has not been set with -Xmx, 1837 // then set it as fraction of the size of physical memory, 1838 // respecting the maximum and minimum sizes of the heap. 1839 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 1840 julong reasonable_max = phys_mem / MaxRAMFraction; 1841 1842 if (phys_mem <= MaxHeapSize * MinRAMFraction) { 1843 // Small physical memory, so use a minimum fraction of it for the heap 1844 reasonable_max = phys_mem / MinRAMFraction; 1845 } else { 1846 // Not-small physical memory, so require a heap at least 1847 // as large as MaxHeapSize 1848 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); 1849 } 1850 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { 1851 // Limit the heap size to ErgoHeapSizeLimit 1852 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); 1853 } 1854 if (UseCompressedOops) { 1855 // Limit the heap size to the maximum possible when using compressed oops 1856 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); 1857 1858 // HeapBaseMinAddress can be greater than default but not less than. 1859 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { 1860 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { 1861 // matches compressed oops printing flags 1862 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { 1863 jio_fprintf(defaultStream::error_stream(), 1864 "HeapBaseMinAddress must be at least " UINTX_FORMAT 1865 " (" UINTX_FORMAT "G) which is greater than value given " 1866 UINTX_FORMAT "\n", 1867 DefaultHeapBaseMinAddress, 1868 DefaultHeapBaseMinAddress/G, 1869 HeapBaseMinAddress); 1870 } 1871 FLAG_SET_ERGO(uintx, HeapBaseMinAddress, DefaultHeapBaseMinAddress); 1872 } 1873 } 1874 1875 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { 1876 // Heap should be above HeapBaseMinAddress to get zero based compressed oops 1877 // but it should be not less than default MaxHeapSize. 1878 max_coop_heap -= HeapBaseMinAddress; 1879 } 1880 reasonable_max = MIN2(reasonable_max, max_coop_heap); 1881 } 1882 reasonable_max = limit_by_allocatable_memory(reasonable_max); 1883 1884 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { 1885 // An initial heap size was specified on the command line, 1886 // so be sure that the maximum size is consistent. Done 1887 // after call to limit_by_allocatable_memory because that 1888 // method might reduce the allocation size. 1889 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); 1890 } 1891 1892 if (PrintGCDetails && Verbose) { 1893 // Cannot use gclog_or_tty yet. 1894 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); 1895 } 1896 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); 1897 } 1898 1899 // If the minimum or initial heap_size have not been set or requested to be set 1900 // ergonomically, set them accordingly. 1901 if (InitialHeapSize == 0 || min_heap_size() == 0) { 1902 julong reasonable_minimum = (julong)(OldSize + NewSize); 1903 1904 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); 1905 1906 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); 1907 1908 if (InitialHeapSize == 0) { 1909 julong reasonable_initial = phys_mem / InitialRAMFraction; 1910 1911 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); 1912 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); 1913 1914 reasonable_initial = limit_by_allocatable_memory(reasonable_initial); 1915 1916 if (PrintGCDetails && Verbose) { 1917 // Cannot use gclog_or_tty yet. 1918 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); 1919 } 1920 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); 1921 } 1922 // If the minimum heap size has not been set (via -Xms), 1923 // synchronize with InitialHeapSize to avoid errors with the default value. 1924 if (min_heap_size() == 0) { 1925 set_min_heap_size(MIN2((uintx)reasonable_minimum, InitialHeapSize)); 1926 if (PrintGCDetails && Verbose) { 1927 // Cannot use gclog_or_tty yet. 1928 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size()); 1929 } 1930 } 1931 } 1932 } 1933 1934 // This must be called after ergonomics because we want bytecode rewriting 1935 // if the server compiler is used, or if UseSharedSpaces is disabled. 1936 void Arguments::set_bytecode_flags() { 1937 // Better not attempt to store into a read-only space. 1938 if (UseSharedSpaces) { 1939 FLAG_SET_DEFAULT(RewriteBytecodes, false); 1940 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1941 } 1942 1943 if (!RewriteBytecodes) { 1944 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); 1945 } 1946 } 1947 1948 // Aggressive optimization flags -XX:+AggressiveOpts 1949 void Arguments::set_aggressive_opts_flags() { 1950 #ifdef COMPILER2 1951 if (AggressiveUnboxing) { 1952 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1953 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1954 } else if (!EliminateAutoBox) { 1955 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled"); 1956 AggressiveUnboxing = false; 1957 } 1958 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { 1959 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); 1960 } else if (!DoEscapeAnalysis) { 1961 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled"); 1962 AggressiveUnboxing = false; 1963 } 1964 } 1965 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1966 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { 1967 FLAG_SET_DEFAULT(EliminateAutoBox, true); 1968 } 1969 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { 1970 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); 1971 } 1972 1973 // Feed the cache size setting into the JDK 1974 char buffer[1024]; 1975 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); 1976 add_property(buffer); 1977 } 1978 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { 1979 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); 1980 } 1981 #endif 1982 1983 if (AggressiveOpts) { 1984 // Sample flag setting code 1985 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { 1986 // FLAG_SET_DEFAULT(EliminateZeroing, true); 1987 // } 1988 } 1989 } 1990 1991 //=========================================================================================================== 1992 // Parsing of java.compiler property 1993 1994 void Arguments::process_java_compiler_argument(char* arg) { 1995 // For backwards compatibility, Djava.compiler=NONE or "" 1996 // causes us to switch to -Xint mode UNLESS -Xdebug 1997 // is also specified. 1998 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { 1999 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. 2000 } 2001 } 2002 2003 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { 2004 _sun_java_launcher = os::strdup_check_oom(launcher); 2005 } 2006 2007 bool Arguments::created_by_java_launcher() { 2008 assert(_sun_java_launcher != NULL, "property must have value"); 2009 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; 2010 } 2011 2012 bool Arguments::sun_java_launcher_is_altjvm() { 2013 return _sun_java_launcher_is_altjvm; 2014 } 2015 2016 //=========================================================================================================== 2017 // Parsing of main arguments 2018 2019 bool Arguments::verify_interval(uintx val, uintx min, 2020 uintx max, const char* name) { 2021 // Returns true iff value is in the inclusive interval [min..max] 2022 // false, otherwise. 2023 if (val >= min && val <= max) { 2024 return true; 2025 } 2026 jio_fprintf(defaultStream::error_stream(), 2027 "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT 2028 " and " UINTX_FORMAT "\n", 2029 name, val, min, max); 2030 return false; 2031 } 2032 2033 bool Arguments::verify_min_value(intx val, intx min, const char* name) { 2034 // Returns true if given value is at least specified min threshold 2035 // false, otherwise. 2036 if (val >= min ) { 2037 return true; 2038 } 2039 jio_fprintf(defaultStream::error_stream(), 2040 "%s of " INTX_FORMAT " is invalid; must be at least " INTX_FORMAT "\n", 2041 name, val, min); 2042 return false; 2043 } 2044 2045 bool Arguments::verify_percentage(uintx value, const char* name) { 2046 if (is_percentage(value)) { 2047 return true; 2048 } 2049 jio_fprintf(defaultStream::error_stream(), 2050 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", 2051 name, value); 2052 return false; 2053 } 2054 2055 // check if do gclog rotation 2056 // +UseGCLogFileRotation is a must, 2057 // no gc log rotation when log file not supplied or 2058 // NumberOfGCLogFiles is 0 2059 void check_gclog_consistency() { 2060 if (UseGCLogFileRotation) { 2061 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) { 2062 jio_fprintf(defaultStream::output_stream(), 2063 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n" 2064 "where num_of_file > 0\n" 2065 "GC log rotation is turned off\n"); 2066 UseGCLogFileRotation = false; 2067 } 2068 } 2069 2070 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) { 2071 FLAG_SET_CMDLINE(uintx, GCLogFileSize, 8*K); 2072 jio_fprintf(defaultStream::output_stream(), 2073 "GCLogFileSize changed to minimum 8K\n"); 2074 } 2075 } 2076 2077 // This function is called for -Xloggc:<filename>, it can be used 2078 // to check if a given file name(or string) conforms to the following 2079 // specification: 2080 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]" 2081 // %p and %t only allowed once. We only limit usage of filename not path 2082 bool is_filename_valid(const char *file_name) { 2083 const char* p = file_name; 2084 char file_sep = os::file_separator()[0]; 2085 const char* cp; 2086 // skip prefix path 2087 for (cp = file_name; *cp != '\0'; cp++) { 2088 if (*cp == '/' || *cp == file_sep) { 2089 p = cp + 1; 2090 } 2091 } 2092 2093 int count_p = 0; 2094 int count_t = 0; 2095 while (*p != '\0') { 2096 if ((*p >= '0' && *p <= '9') || 2097 (*p >= 'A' && *p <= 'Z') || 2098 (*p >= 'a' && *p <= 'z') || 2099 *p == '-' || 2100 *p == '_' || 2101 *p == '.') { 2102 p++; 2103 continue; 2104 } 2105 if (*p == '%') { 2106 if(*(p + 1) == 'p') { 2107 p += 2; 2108 count_p ++; 2109 continue; 2110 } 2111 if (*(p + 1) == 't') { 2112 p += 2; 2113 count_t ++; 2114 continue; 2115 } 2116 } 2117 return false; 2118 } 2119 return count_p < 2 && count_t < 2; 2120 } 2121 2122 bool Arguments::verify_MinHeapFreeRatio(FormatBuffer<80>& err_msg, uintx min_heap_free_ratio) { 2123 if (!is_percentage(min_heap_free_ratio)) { 2124 err_msg.print("MinHeapFreeRatio must have a value between 0 and 100"); 2125 return false; 2126 } 2127 if (min_heap_free_ratio > MaxHeapFreeRatio) { 2128 err_msg.print("MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " 2129 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")", min_heap_free_ratio, 2130 MaxHeapFreeRatio); 2131 return false; 2132 } 2133 // This does not set the flag itself, but stores the value in a safe place for later usage. 2134 _min_heap_free_ratio = min_heap_free_ratio; 2135 return true; 2136 } 2137 2138 bool Arguments::verify_MaxHeapFreeRatio(FormatBuffer<80>& err_msg, uintx max_heap_free_ratio) { 2139 if (!is_percentage(max_heap_free_ratio)) { 2140 err_msg.print("MaxHeapFreeRatio must have a value between 0 and 100"); 2141 return false; 2142 } 2143 if (max_heap_free_ratio < MinHeapFreeRatio) { 2144 err_msg.print("MaxHeapFreeRatio (" UINTX_FORMAT ") must be greater than or " 2145 "equal to MinHeapFreeRatio (" UINTX_FORMAT ")", max_heap_free_ratio, 2146 MinHeapFreeRatio); 2147 return false; 2148 } 2149 // This does not set the flag itself, but stores the value in a safe place for later usage. 2150 _max_heap_free_ratio = max_heap_free_ratio; 2151 return true; 2152 } 2153 2154 // Check consistency of GC selection 2155 bool Arguments::check_gc_consistency_user() { 2156 check_gclog_consistency(); 2157 bool status = true; 2158 // Ensure that the user has not selected conflicting sets 2159 // of collectors. [Note: this check is merely a user convenience; 2160 // collectors over-ride each other so that only a non-conflicting 2161 // set is selected; however what the user gets is not what they 2162 // may have expected from the combination they asked for. It's 2163 // better to reduce user confusion by not allowing them to 2164 // select conflicting combinations. 2165 uint i = 0; 2166 if (UseSerialGC) i++; 2167 if (UseConcMarkSweepGC || UseParNewGC) i++; 2168 if (UseParallelGC || UseParallelOldGC) i++; 2169 if (UseG1GC) i++; 2170 if (i > 1) { 2171 jio_fprintf(defaultStream::error_stream(), 2172 "Conflicting collector combinations in option list; " 2173 "please refer to the release notes for the combinations " 2174 "allowed\n"); 2175 status = false; 2176 } 2177 return status; 2178 } 2179 2180 void Arguments::check_deprecated_gcs() { 2181 if (UseConcMarkSweepGC && !UseParNewGC) { 2182 warning("Using the DefNew young collector with the CMS collector is deprecated " 2183 "and will likely be removed in a future release"); 2184 } 2185 2186 if (UseParNewGC && !UseConcMarkSweepGC) { 2187 // !UseConcMarkSweepGC means that we are using serial old gc. Unfortunately we don't 2188 // set up UseSerialGC properly, so that can't be used in the check here. 2189 warning("Using the ParNew young collector with the Serial old collector is deprecated " 2190 "and will likely be removed in a future release"); 2191 } 2192 2193 if (CMSIncrementalMode) { 2194 warning("Using incremental CMS is deprecated and will likely be removed in a future release"); 2195 } 2196 } 2197 2198 void Arguments::check_deprecated_gc_flags() { 2199 if (FLAG_IS_CMDLINE(MaxGCMinorPauseMillis)) { 2200 warning("Using MaxGCMinorPauseMillis as minor pause goal is deprecated" 2201 "and will likely be removed in future release"); 2202 } 2203 if (FLAG_IS_CMDLINE(DefaultMaxRAMFraction)) { 2204 warning("DefaultMaxRAMFraction is deprecated and will likely be removed in a future release. " 2205 "Use MaxRAMFraction instead."); 2206 } 2207 if (FLAG_IS_CMDLINE(UseCMSCompactAtFullCollection)) { 2208 warning("UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release."); 2209 } 2210 if (FLAG_IS_CMDLINE(CMSFullGCsBeforeCompaction)) { 2211 warning("CMSFullGCsBeforeCompaction is deprecated and will likely be removed in a future release."); 2212 } 2213 if (FLAG_IS_CMDLINE(UseCMSCollectionPassing)) { 2214 warning("UseCMSCollectionPassing is deprecated and will likely be removed in a future release."); 2215 } 2216 } 2217 2218 // Check stack pages settings 2219 bool Arguments::check_stack_pages() 2220 { 2221 bool status = true; 2222 status = status && verify_min_value(StackYellowPages, 1, "StackYellowPages"); 2223 status = status && verify_min_value(StackRedPages, 1, "StackRedPages"); 2224 // greater stack shadow pages can't generate instruction to bang stack 2225 status = status && verify_interval(StackShadowPages, 1, 50, "StackShadowPages"); 2226 return status; 2227 } 2228 2229 // Check the consistency of vm_init_args 2230 bool Arguments::check_vm_args_consistency() { 2231 // Method for adding checks for flag consistency. 2232 // The intent is to warn the user of all possible conflicts, 2233 // before returning an error. 2234 // Note: Needs platform-dependent factoring. 2235 bool status = true; 2236 2237 if (TLABRefillWasteFraction == 0) { 2238 jio_fprintf(defaultStream::error_stream(), 2239 "TLABRefillWasteFraction should be a denominator, " 2240 "not " SIZE_FORMAT "\n", 2241 TLABRefillWasteFraction); 2242 status = false; 2243 } 2244 2245 status = status && verify_interval(AdaptiveSizePolicyWeight, 0, 100, 2246 "AdaptiveSizePolicyWeight"); 2247 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); 2248 2249 // Divide by bucket size to prevent a large size from causing rollover when 2250 // calculating amount of memory needed to be allocated for the String table. 2251 status = status && verify_interval(StringTableSize, minimumStringTableSize, 2252 (max_uintx / StringTable::bucket_size()), "StringTable size"); 2253 2254 status = status && verify_interval(SymbolTableSize, minimumSymbolTableSize, 2255 (max_uintx / SymbolTable::bucket_size()), "SymbolTable size"); 2256 2257 { 2258 // Using "else if" below to avoid printing two error messages if min > max. 2259 // This will also prevent us from reporting both min>100 and max>100 at the 2260 // same time, but that is less annoying than printing two identical errors IMHO. 2261 FormatBuffer<80> err_msg("%s",""); 2262 if (!verify_MinHeapFreeRatio(err_msg, MinHeapFreeRatio)) { 2263 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer()); 2264 status = false; 2265 } else if (!verify_MaxHeapFreeRatio(err_msg, MaxHeapFreeRatio)) { 2266 jio_fprintf(defaultStream::error_stream(), "%s\n", err_msg.buffer()); 2267 status = false; 2268 } 2269 } 2270 2271 // Min/MaxMetaspaceFreeRatio 2272 status = status && verify_percentage(MinMetaspaceFreeRatio, "MinMetaspaceFreeRatio"); 2273 status = status && verify_percentage(MaxMetaspaceFreeRatio, "MaxMetaspaceFreeRatio"); 2274 2275 if (MinMetaspaceFreeRatio > MaxMetaspaceFreeRatio) { 2276 jio_fprintf(defaultStream::error_stream(), 2277 "MinMetaspaceFreeRatio (%s" UINTX_FORMAT ") must be less than or " 2278 "equal to MaxMetaspaceFreeRatio (%s" UINTX_FORMAT ")\n", 2279 FLAG_IS_DEFAULT(MinMetaspaceFreeRatio) ? "Default: " : "", 2280 MinMetaspaceFreeRatio, 2281 FLAG_IS_DEFAULT(MaxMetaspaceFreeRatio) ? "Default: " : "", 2282 MaxMetaspaceFreeRatio); 2283 status = false; 2284 } 2285 2286 // Trying to keep 100% free is not practical 2287 MinMetaspaceFreeRatio = MIN2(MinMetaspaceFreeRatio, (uintx) 99); 2288 2289 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { 2290 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. 2291 } 2292 2293 if (UseParallelOldGC && ParallelOldGCSplitALot) { 2294 // Settings to encourage splitting. 2295 if (!FLAG_IS_CMDLINE(NewRatio)) { 2296 FLAG_SET_CMDLINE(uintx, NewRatio, 2); 2297 } 2298 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { 2299 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 2300 } 2301 } 2302 2303 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) { 2304 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false); 2305 } 2306 2307 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); 2308 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); 2309 if (GCTimeLimit == 100) { 2310 // Turn off gc-overhead-limit-exceeded checks 2311 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); 2312 } 2313 2314 status = status && ArgumentsExt::check_gc_consistency_user(); 2315 status = status && check_stack_pages(); 2316 2317 if (CMSIncrementalMode) { 2318 if (!UseConcMarkSweepGC) { 2319 jio_fprintf(defaultStream::error_stream(), 2320 "error: invalid argument combination.\n" 2321 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " 2322 "selected in order\nto use CMSIncrementalMode.\n"); 2323 status = false; 2324 } else { 2325 status = status && verify_percentage(CMSIncrementalDutyCycle, 2326 "CMSIncrementalDutyCycle"); 2327 status = status && verify_percentage(CMSIncrementalDutyCycleMin, 2328 "CMSIncrementalDutyCycleMin"); 2329 status = status && verify_percentage(CMSIncrementalSafetyFactor, 2330 "CMSIncrementalSafetyFactor"); 2331 status = status && verify_percentage(CMSIncrementalOffset, 2332 "CMSIncrementalOffset"); 2333 status = status && verify_percentage(CMSExpAvgFactor, 2334 "CMSExpAvgFactor"); 2335 // If it was not set on the command line, set 2336 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. 2337 if (CMSInitiatingOccupancyFraction < 0) { 2338 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); 2339 } 2340 } 2341 } 2342 2343 // CMS space iteration, which FLSVerifyAllHeapreferences entails, 2344 // insists that we hold the requisite locks so that the iteration is 2345 // MT-safe. For the verification at start-up and shut-down, we don't 2346 // yet have a good way of acquiring and releasing these locks, 2347 // which are not visible at the CollectedHeap level. We want to 2348 // be able to acquire these locks and then do the iteration rather 2349 // than just disable the lock verification. This will be fixed under 2350 // bug 4788986. 2351 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { 2352 if (VerifyDuringStartup) { 2353 warning("Heap verification at start-up disabled " 2354 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2355 VerifyDuringStartup = false; // Disable verification at start-up 2356 } 2357 2358 if (VerifyBeforeExit) { 2359 warning("Heap verification at shutdown disabled " 2360 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); 2361 VerifyBeforeExit = false; // Disable verification at shutdown 2362 } 2363 } 2364 2365 // Note: only executed in non-PRODUCT mode 2366 if (!UseAsyncConcMarkSweepGC && 2367 (ExplicitGCInvokesConcurrent || 2368 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { 2369 jio_fprintf(defaultStream::error_stream(), 2370 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts" 2371 " with -UseAsyncConcMarkSweepGC"); 2372 status = false; 2373 } 2374 2375 status = status && verify_min_value(ParGCArrayScanChunk, 1, "ParGCArrayScanChunk"); 2376 2377 #if INCLUDE_ALL_GCS 2378 if (UseG1GC) { 2379 status = status && verify_percentage(G1NewSizePercent, "G1NewSizePercent"); 2380 status = status && verify_percentage(G1MaxNewSizePercent, "G1MaxNewSizePercent"); 2381 status = status && verify_interval(G1NewSizePercent, 0, G1MaxNewSizePercent, "G1NewSizePercent"); 2382 2383 status = status && verify_percentage(InitiatingHeapOccupancyPercent, 2384 "InitiatingHeapOccupancyPercent"); 2385 status = status && verify_min_value(G1RefProcDrainInterval, 1, 2386 "G1RefProcDrainInterval"); 2387 status = status && verify_min_value((intx)G1ConcMarkStepDurationMillis, 1, 2388 "G1ConcMarkStepDurationMillis"); 2389 status = status && verify_interval(G1ConcRSHotCardLimit, 0, max_jubyte, 2390 "G1ConcRSHotCardLimit"); 2391 status = status && verify_interval(G1ConcRSLogCacheSize, 0, 31, 2392 "G1ConcRSLogCacheSize"); 2393 status = status && verify_interval(StringDeduplicationAgeThreshold, 1, markOopDesc::max_age, 2394 "StringDeduplicationAgeThreshold"); 2395 } 2396 if (UseConcMarkSweepGC) { 2397 status = status && verify_min_value(CMSOldPLABNumRefills, 1, "CMSOldPLABNumRefills"); 2398 status = status && verify_min_value(CMSOldPLABToleranceFactor, 1, "CMSOldPLABToleranceFactor"); 2399 status = status && verify_min_value(CMSOldPLABMax, 1, "CMSOldPLABMax"); 2400 status = status && verify_interval(CMSOldPLABMin, 1, CMSOldPLABMax, "CMSOldPLABMin"); 2401 2402 status = status && verify_min_value(CMSYoungGenPerWorker, 1, "CMSYoungGenPerWorker"); 2403 2404 status = status && verify_min_value(CMSSamplingGrain, 1, "CMSSamplingGrain"); 2405 status = status && verify_interval(CMS_SweepWeight, 0, 100, "CMS_SweepWeight"); 2406 status = status && verify_interval(CMS_FLSWeight, 0, 100, "CMS_FLSWeight"); 2407 2408 status = status && verify_interval(FLSCoalescePolicy, 0, 4, "FLSCoalescePolicy"); 2409 2410 status = status && verify_min_value(CMSRescanMultiple, 1, "CMSRescanMultiple"); 2411 status = status && verify_min_value(CMSConcMarkMultiple, 1, "CMSConcMarkMultiple"); 2412 2413 status = status && verify_interval(CMSPrecleanIter, 0, 9, "CMSPrecleanIter"); 2414 status = status && verify_min_value(CMSPrecleanDenominator, 1, "CMSPrecleanDenominator"); 2415 status = status && verify_interval(CMSPrecleanNumerator, 0, CMSPrecleanDenominator - 1, "CMSPrecleanNumerator"); 2416 2417 status = status && verify_percentage(CMSBootstrapOccupancy, "CMSBootstrapOccupancy"); 2418 2419 status = status && verify_min_value(CMSPrecleanThreshold, 100, "CMSPrecleanThreshold"); 2420 2421 status = status && verify_percentage(CMSScheduleRemarkEdenPenetration, "CMSScheduleRemarkEdenPenetration"); 2422 status = status && verify_min_value(CMSScheduleRemarkSamplingRatio, 1, "CMSScheduleRemarkSamplingRatio"); 2423 status = status && verify_min_value(CMSBitMapYieldQuantum, 1, "CMSBitMapYieldQuantum"); 2424 status = status && verify_percentage(CMSTriggerRatio, "CMSTriggerRatio"); 2425 status = status && verify_percentage(CMSIsTooFullPercentage, "CMSIsTooFullPercentage"); 2426 } 2427 2428 if (UseParallelGC || UseParallelOldGC) { 2429 status = status && verify_interval(ParallelOldDeadWoodLimiterMean, 0, 100, "ParallelOldDeadWoodLimiterMean"); 2430 status = status && verify_interval(ParallelOldDeadWoodLimiterStdDev, 0, 100, "ParallelOldDeadWoodLimiterStdDev"); 2431 2432 status = status && verify_percentage(YoungGenerationSizeIncrement, "YoungGenerationSizeIncrement"); 2433 status = status && verify_percentage(TenuredGenerationSizeIncrement, "TenuredGenerationSizeIncrement"); 2434 2435 status = status && verify_min_value(YoungGenerationSizeSupplementDecay, 1, "YoungGenerationSizeSupplementDecay"); 2436 status = status && verify_min_value(TenuredGenerationSizeSupplementDecay, 1, "TenuredGenerationSizeSupplementDecay"); 2437 2438 status = status && verify_min_value(ParGCCardsPerStrideChunk, 1, "ParGCCardsPerStrideChunk"); 2439 2440 status = status && verify_min_value(ParallelOldGCSplitInterval, 0, "ParallelOldGCSplitInterval"); 2441 } 2442 #endif // INCLUDE_ALL_GCS 2443 2444 status = status && verify_interval(RefDiscoveryPolicy, 2445 ReferenceProcessor::DiscoveryPolicyMin, 2446 ReferenceProcessor::DiscoveryPolicyMax, 2447 "RefDiscoveryPolicy"); 2448 2449 // Limit the lower bound of this flag to 1 as it is used in a division 2450 // expression. 2451 status = status && verify_interval(TLABWasteTargetPercent, 2452 1, 100, "TLABWasteTargetPercent"); 2453 2454 status = status && verify_object_alignment(); 2455 2456 status = status && verify_interval(CompressedClassSpaceSize, 1*M, 3*G, 2457 "CompressedClassSpaceSize"); 2458 2459 status = status && verify_interval(MarkStackSizeMax, 2460 1, (max_jint - 1), "MarkStackSizeMax"); 2461 status = status && verify_interval(NUMAChunkResizeWeight, 0, 100, "NUMAChunkResizeWeight"); 2462 2463 status = status && verify_min_value(LogEventsBufferEntries, 1, "LogEventsBufferEntries"); 2464 2465 status = status && verify_min_value(HeapSizePerGCThread, (uintx) os::vm_page_size(), "HeapSizePerGCThread"); 2466 2467 status = status && verify_min_value(GCTaskTimeStampEntries, 1, "GCTaskTimeStampEntries"); 2468 2469 status = status && verify_percentage(ParallelGCBufferWastePct, "ParallelGCBufferWastePct"); 2470 status = status && verify_interval(TargetPLABWastePct, 1, 100, "TargetPLABWastePct"); 2471 2472 status = status && verify_min_value(ParGCStridesPerThread, 1, "ParGCStridesPerThread"); 2473 2474 status = status && verify_min_value(MinRAMFraction, 1, "MinRAMFraction"); 2475 status = status && verify_min_value(InitialRAMFraction, 1, "InitialRAMFraction"); 2476 status = status && verify_min_value(MaxRAMFraction, 1, "MaxRAMFraction"); 2477 status = status && verify_min_value(DefaultMaxRAMFraction, 1, "DefaultMaxRAMFraction"); 2478 2479 status = status && verify_interval(AdaptiveTimeWeight, 0, 100, "AdaptiveTimeWeight"); 2480 status = status && verify_min_value(AdaptiveSizeDecrementScaleFactor, 1, "AdaptiveSizeDecrementScaleFactor"); 2481 2482 status = status && verify_interval(TLABAllocationWeight, 0, 100, "TLABAllocationWeight"); 2483 status = status && verify_min_value(MinTLABSize, 1, "MinTLABSize"); 2484 status = status && verify_min_value(TLABRefillWasteFraction, 1, "TLABRefillWasteFraction"); 2485 2486 status = status && verify_percentage(YoungGenerationSizeSupplement, "YoungGenerationSizeSupplement"); 2487 status = status && verify_percentage(TenuredGenerationSizeSupplement, "TenuredGenerationSizeSupplement"); 2488 2489 status = status && verify_interval(MaxTenuringThreshold, 0, markOopDesc::max_age + 1, "MaxTenuringThreshold"); 2490 status = status && verify_interval(InitialTenuringThreshold, 0, MaxTenuringThreshold, "InitialTenuringThreshold"); 2491 status = status && verify_percentage(TargetSurvivorRatio, "TargetSurvivorRatio"); 2492 status = status && verify_percentage(MarkSweepDeadRatio, "MarkSweepDeadRatio"); 2493 2494 status = status && verify_min_value(MarkSweepAlwaysCompactCount, 1, "MarkSweepAlwaysCompactCount"); 2495 #ifdef COMPILER1 2496 status = status && verify_min_value(ValueMapInitialSize, 1, "ValueMapInitialSize"); 2497 #endif 2498 2499 if (PrintNMTStatistics) { 2500 #if INCLUDE_NMT 2501 if (MemTracker::tracking_level() == NMT_off) { 2502 #endif // INCLUDE_NMT 2503 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); 2504 PrintNMTStatistics = false; 2505 #if INCLUDE_NMT 2506 } 2507 #endif 2508 } 2509 2510 // Need to limit the extent of the padding to reasonable size. 2511 // 8K is well beyond the reasonable HW cache line size, even with the 2512 // aggressive prefetching, while still leaving the room for segregating 2513 // among the distinct pages. 2514 if (ContendedPaddingWidth < 0 || ContendedPaddingWidth > 8192) { 2515 jio_fprintf(defaultStream::error_stream(), 2516 "ContendedPaddingWidth=" INTX_FORMAT " must be in between %d and %d\n", 2517 ContendedPaddingWidth, 0, 8192); 2518 status = false; 2519 } 2520 2521 // Need to enforce the padding not to break the existing field alignments. 2522 // It is sufficient to check against the largest type size. 2523 if ((ContendedPaddingWidth % BytesPerLong) != 0) { 2524 jio_fprintf(defaultStream::error_stream(), 2525 "ContendedPaddingWidth=" INTX_FORMAT " must be a multiple of %d\n", 2526 ContendedPaddingWidth, BytesPerLong); 2527 status = false; 2528 } 2529 2530 // Check lower bounds of the code cache 2531 // Template Interpreter code is approximately 3X larger in debug builds. 2532 uint min_code_cache_size = (CodeCacheMinimumUseSpace DEBUG_ONLY(* 3)) + CodeCacheMinimumFreeSpace; 2533 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) { 2534 jio_fprintf(defaultStream::error_stream(), 2535 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K, 2536 os::vm_page_size()/K); 2537 status = false; 2538 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) { 2539 jio_fprintf(defaultStream::error_stream(), 2540 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", 2541 ReservedCodeCacheSize/K, InitialCodeCacheSize/K); 2542 status = false; 2543 } else if (ReservedCodeCacheSize < min_code_cache_size) { 2544 jio_fprintf(defaultStream::error_stream(), 2545 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, 2546 min_code_cache_size/K); 2547 status = false; 2548 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) { 2549 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported. 2550 jio_fprintf(defaultStream::error_stream(), 2551 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, 2552 CODE_CACHE_SIZE_LIMIT/M); 2553 status = false; 2554 } else if (NonNMethodCodeHeapSize < min_code_cache_size){ 2555 jio_fprintf(defaultStream::error_stream(), 2556 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, 2557 min_code_cache_size/K); 2558 status = false; 2559 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) 2560 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) { 2561 jio_fprintf(defaultStream::error_stream(), 2562 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n", 2563 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K, 2564 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K); 2565 status = false; 2566 } 2567 2568 status &= verify_interval(NmethodSweepFraction, 1, ReservedCodeCacheSize/K, "NmethodSweepFraction"); 2569 status &= verify_interval(NmethodSweepActivity, 0, 2000, "NmethodSweepActivity"); 2570 status &= verify_interval(CodeCacheMinBlockLength, 1, 100, "CodeCacheMinBlockLength"); 2571 status &= verify_interval(CodeCacheSegmentSize, 1, 1024, "CodeCacheSegmentSize"); 2572 2573 int min_number_of_compiler_threads = get_min_number_of_compiler_threads(); 2574 // The default CICompilerCount's value is CI_COMPILER_COUNT. 2575 assert(min_number_of_compiler_threads <= CI_COMPILER_COUNT, "minimum should be less or equal default number"); 2576 // Check the minimum number of compiler threads 2577 status &=verify_min_value(CICompilerCount, min_number_of_compiler_threads, "CICompilerCount"); 2578 2579 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { 2580 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); 2581 } 2582 2583 return status; 2584 } 2585 2586 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, 2587 const char* option_type) { 2588 if (ignore) return false; 2589 2590 const char* spacer = " "; 2591 if (option_type == NULL) { 2592 option_type = ++spacer; // Set both to the empty string. 2593 } 2594 2595 if (os::obsolete_option(option)) { 2596 jio_fprintf(defaultStream::error_stream(), 2597 "Obsolete %s%soption: %s\n", option_type, spacer, 2598 option->optionString); 2599 return false; 2600 } else { 2601 jio_fprintf(defaultStream::error_stream(), 2602 "Unrecognized %s%soption: %s\n", option_type, spacer, 2603 option->optionString); 2604 return true; 2605 } 2606 } 2607 2608 static const char* user_assertion_options[] = { 2609 "-da", "-ea", "-disableassertions", "-enableassertions", 0 2610 }; 2611 2612 static const char* system_assertion_options[] = { 2613 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 2614 }; 2615 2616 // Return true if any of the strings in null-terminated array 'names' matches. 2617 // If tail_allowed is true, then the tail must begin with a colon; otherwise, 2618 // the option must match exactly. 2619 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, 2620 bool tail_allowed) { 2621 for (/* empty */; *names != NULL; ++names) { 2622 if (match_option(option, *names, tail)) { 2623 if (**tail == '\0' || tail_allowed && **tail == ':') { 2624 return true; 2625 } 2626 } 2627 } 2628 return false; 2629 } 2630 2631 bool Arguments::parse_uintx(const char* value, 2632 uintx* uintx_arg, 2633 uintx min_size) { 2634 2635 // Check the sign first since atomull() parses only unsigned values. 2636 bool value_is_positive = !(*value == '-'); 2637 2638 if (value_is_positive) { 2639 julong n; 2640 bool good_return = atomull(value, &n); 2641 if (good_return) { 2642 bool above_minimum = n >= min_size; 2643 bool value_is_too_large = n > max_uintx; 2644 2645 if (above_minimum && !value_is_too_large) { 2646 *uintx_arg = n; 2647 return true; 2648 } 2649 } 2650 } 2651 return false; 2652 } 2653 2654 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, 2655 julong* long_arg, 2656 julong min_size) { 2657 if (!atomull(s, long_arg)) return arg_unreadable; 2658 return check_memory_size(*long_arg, min_size); 2659 } 2660 2661 // Parse JavaVMInitArgs structure 2662 2663 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { 2664 // For components of the system classpath. 2665 SysClassPath scp(Arguments::get_sysclasspath()); 2666 bool scp_assembly_required = false; 2667 2668 // Save default settings for some mode flags 2669 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; 2670 Arguments::_UseOnStackReplacement = UseOnStackReplacement; 2671 Arguments::_ClipInlining = ClipInlining; 2672 Arguments::_BackgroundCompilation = BackgroundCompilation; 2673 2674 // Setup flags for mixed which is the default 2675 set_mode_flags(_mixed); 2676 2677 // Parse JAVA_TOOL_OPTIONS environment variable (if present) 2678 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); 2679 if (result != JNI_OK) { 2680 return result; 2681 } 2682 2683 // Parse JavaVMInitArgs structure passed in 2684 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, Flag::COMMAND_LINE); 2685 if (result != JNI_OK) { 2686 return result; 2687 } 2688 2689 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) 2690 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); 2691 if (result != JNI_OK) { 2692 return result; 2693 } 2694 2695 // Do final processing now that all arguments have been parsed 2696 result = finalize_vm_init_args(&scp, scp_assembly_required); 2697 if (result != JNI_OK) { 2698 return result; 2699 } 2700 2701 return JNI_OK; 2702 } 2703 2704 // Checks if name in command-line argument -agent{lib,path}:name[=options] 2705 // represents a valid HPROF of JDWP agent. is_path==true denotes that we 2706 // are dealing with -agentpath (case where name is a path), otherwise with 2707 // -agentlib 2708 bool valid_hprof_or_jdwp_agent(char *name, bool is_path) { 2709 char *_name; 2710 const char *_hprof = "hprof", *_jdwp = "jdwp"; 2711 size_t _len_hprof, _len_jdwp, _len_prefix; 2712 2713 if (is_path) { 2714 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) { 2715 return false; 2716 } 2717 2718 _name++; // skip past last path separator 2719 _len_prefix = strlen(JNI_LIB_PREFIX); 2720 2721 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) { 2722 return false; 2723 } 2724 2725 _name += _len_prefix; 2726 _len_hprof = strlen(_hprof); 2727 _len_jdwp = strlen(_jdwp); 2728 2729 if (strncmp(_name, _hprof, _len_hprof) == 0) { 2730 _name += _len_hprof; 2731 } 2732 else if (strncmp(_name, _jdwp, _len_jdwp) == 0) { 2733 _name += _len_jdwp; 2734 } 2735 else { 2736 return false; 2737 } 2738 2739 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) { 2740 return false; 2741 } 2742 2743 return true; 2744 } 2745 2746 if (strcmp(name, _hprof) == 0 || strcmp(name, _jdwp) == 0) { 2747 return true; 2748 } 2749 2750 return false; 2751 } 2752 2753 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, 2754 SysClassPath* scp_p, 2755 bool* scp_assembly_required_p, 2756 Flag::Flags origin) { 2757 // Remaining part of option string 2758 const char* tail; 2759 2760 // iterate over arguments 2761 for (int index = 0; index < args->nOptions; index++) { 2762 bool is_absolute_path = false; // for -agentpath vs -agentlib 2763 2764 const JavaVMOption* option = args->options + index; 2765 2766 if (!match_option(option, "-Djava.class.path", &tail) && 2767 !match_option(option, "-Dsun.java.command", &tail) && 2768 !match_option(option, "-Dsun.java.launcher", &tail)) { 2769 2770 // add all jvm options to the jvm_args string. This string 2771 // is used later to set the java.vm.args PerfData string constant. 2772 // the -Djava.class.path and the -Dsun.java.command options are 2773 // omitted from jvm_args string as each have their own PerfData 2774 // string constant object. 2775 build_jvm_args(option->optionString); 2776 } 2777 2778 // -verbose:[class/gc/jni] 2779 if (match_option(option, "-verbose", &tail)) { 2780 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { 2781 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); 2782 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); 2783 } else if (!strcmp(tail, ":gc")) { 2784 FLAG_SET_CMDLINE(bool, PrintGC, true); 2785 } else if (!strcmp(tail, ":jni")) { 2786 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); 2787 } 2788 // -da / -ea / -disableassertions / -enableassertions 2789 // These accept an optional class/package name separated by a colon, e.g., 2790 // -da:java.lang.Thread. 2791 } else if (match_option(option, user_assertion_options, &tail, true)) { 2792 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2793 if (*tail == '\0') { 2794 JavaAssertions::setUserClassDefault(enable); 2795 } else { 2796 assert(*tail == ':', "bogus match by match_option()"); 2797 JavaAssertions::addOption(tail + 1, enable); 2798 } 2799 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions 2800 } else if (match_option(option, system_assertion_options, &tail, false)) { 2801 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' 2802 JavaAssertions::setSystemClassDefault(enable); 2803 // -bootclasspath: 2804 } else if (match_option(option, "-Xbootclasspath:", &tail)) { 2805 scp_p->reset_path(tail); 2806 *scp_assembly_required_p = true; 2807 // -bootclasspath/a: 2808 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { 2809 scp_p->add_suffix(tail); 2810 *scp_assembly_required_p = true; 2811 // -bootclasspath/p: 2812 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { 2813 scp_p->add_prefix(tail); 2814 *scp_assembly_required_p = true; 2815 // -Xrun 2816 } else if (match_option(option, "-Xrun", &tail)) { 2817 if (tail != NULL) { 2818 const char* pos = strchr(tail, ':'); 2819 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2820 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2821 name[len] = '\0'; 2822 2823 char *options = NULL; 2824 if(pos != NULL) { 2825 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. 2826 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2); 2827 } 2828 #if !INCLUDE_JVMTI 2829 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { 2830 jio_fprintf(defaultStream::error_stream(), 2831 "Profiling and debugging agents are not supported in this VM\n"); 2832 return JNI_ERR; 2833 } 2834 #endif // !INCLUDE_JVMTI 2835 add_init_library(name, options); 2836 } 2837 // -agentlib and -agentpath 2838 } else if (match_option(option, "-agentlib:", &tail) || 2839 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { 2840 if(tail != NULL) { 2841 const char* pos = strchr(tail, '='); 2842 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; 2843 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); 2844 name[len] = '\0'; 2845 2846 char *options = NULL; 2847 if(pos != NULL) { 2848 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1, mtInternal), pos + 1); 2849 } 2850 #if !INCLUDE_JVMTI 2851 if (valid_hprof_or_jdwp_agent(name, is_absolute_path)) { 2852 jio_fprintf(defaultStream::error_stream(), 2853 "Profiling and debugging agents are not supported in this VM\n"); 2854 return JNI_ERR; 2855 } 2856 #endif // !INCLUDE_JVMTI 2857 add_init_agent(name, options, is_absolute_path); 2858 } 2859 // -javaagent 2860 } else if (match_option(option, "-javaagent:", &tail)) { 2861 #if !INCLUDE_JVMTI 2862 jio_fprintf(defaultStream::error_stream(), 2863 "Instrumentation agents are not supported in this VM\n"); 2864 return JNI_ERR; 2865 #else 2866 if(tail != NULL) { 2867 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail); 2868 add_init_agent("instrument", options, false); 2869 } 2870 #endif // !INCLUDE_JVMTI 2871 // -Xnoclassgc 2872 } else if (match_option(option, "-Xnoclassgc", &tail)) { 2873 FLAG_SET_CMDLINE(bool, ClassUnloading, false); 2874 // -Xincgc: i-CMS 2875 } else if (match_option(option, "-Xincgc", &tail)) { 2876 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 2877 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); 2878 // -Xnoincgc: no i-CMS 2879 } else if (match_option(option, "-Xnoincgc", &tail)) { 2880 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 2881 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); 2882 // -Xconcgc 2883 } else if (match_option(option, "-Xconcgc", &tail)) { 2884 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); 2885 // -Xnoconcgc 2886 } else if (match_option(option, "-Xnoconcgc", &tail)) { 2887 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); 2888 // -Xbatch 2889 } else if (match_option(option, "-Xbatch", &tail)) { 2890 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 2891 // -Xmn for compatibility with other JVM vendors 2892 } else if (match_option(option, "-Xmn", &tail)) { 2893 julong long_initial_young_size = 0; 2894 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1); 2895 if (errcode != arg_in_range) { 2896 jio_fprintf(defaultStream::error_stream(), 2897 "Invalid initial young generation size: %s\n", option->optionString); 2898 describe_range_error(errcode); 2899 return JNI_EINVAL; 2900 } 2901 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_young_size); 2902 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_young_size); 2903 // -Xms 2904 } else if (match_option(option, "-Xms", &tail)) { 2905 julong long_initial_heap_size = 0; 2906 // an initial heap size of 0 means automatically determine 2907 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0); 2908 if (errcode != arg_in_range) { 2909 jio_fprintf(defaultStream::error_stream(), 2910 "Invalid initial heap size: %s\n", option->optionString); 2911 describe_range_error(errcode); 2912 return JNI_EINVAL; 2913 } 2914 set_min_heap_size((uintx)long_initial_heap_size); 2915 // Currently the minimum size and the initial heap sizes are the same. 2916 // Can be overridden with -XX:InitialHeapSize. 2917 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); 2918 // -Xmx 2919 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) { 2920 julong long_max_heap_size = 0; 2921 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); 2922 if (errcode != arg_in_range) { 2923 jio_fprintf(defaultStream::error_stream(), 2924 "Invalid maximum heap size: %s\n", option->optionString); 2925 describe_range_error(errcode); 2926 return JNI_EINVAL; 2927 } 2928 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); 2929 // Xmaxf 2930 } else if (match_option(option, "-Xmaxf", &tail)) { 2931 char* err; 2932 int maxf = (int)(strtod(tail, &err) * 100); 2933 if (*err != '\0' || *tail == '\0' || maxf < 0 || maxf > 100) { 2934 jio_fprintf(defaultStream::error_stream(), 2935 "Bad max heap free percentage size: %s\n", 2936 option->optionString); 2937 return JNI_EINVAL; 2938 } else { 2939 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); 2940 } 2941 // Xminf 2942 } else if (match_option(option, "-Xminf", &tail)) { 2943 char* err; 2944 int minf = (int)(strtod(tail, &err) * 100); 2945 if (*err != '\0' || *tail == '\0' || minf < 0 || minf > 100) { 2946 jio_fprintf(defaultStream::error_stream(), 2947 "Bad min heap free percentage size: %s\n", 2948 option->optionString); 2949 return JNI_EINVAL; 2950 } else { 2951 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); 2952 } 2953 // -Xss 2954 } else if (match_option(option, "-Xss", &tail)) { 2955 julong long_ThreadStackSize = 0; 2956 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); 2957 if (errcode != arg_in_range) { 2958 jio_fprintf(defaultStream::error_stream(), 2959 "Invalid thread stack size: %s\n", option->optionString); 2960 describe_range_error(errcode); 2961 return JNI_EINVAL; 2962 } 2963 // Internally track ThreadStackSize in units of 1024 bytes. 2964 FLAG_SET_CMDLINE(intx, ThreadStackSize, 2965 round_to((int)long_ThreadStackSize, K) / K); 2966 // -Xoss 2967 } else if (match_option(option, "-Xoss", &tail)) { 2968 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility 2969 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) { 2970 julong long_CodeCacheExpansionSize = 0; 2971 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size()); 2972 if (errcode != arg_in_range) { 2973 jio_fprintf(defaultStream::error_stream(), 2974 "Invalid argument: %s. Must be at least %luK.\n", option->optionString, 2975 os::vm_page_size()/K); 2976 return JNI_EINVAL; 2977 } 2978 FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize); 2979 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || 2980 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { 2981 julong long_ReservedCodeCacheSize = 0; 2982 2983 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1); 2984 if (errcode != arg_in_range) { 2985 jio_fprintf(defaultStream::error_stream(), 2986 "Invalid maximum code cache size: %s.\n", option->optionString); 2987 return JNI_EINVAL; 2988 } 2989 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); 2990 // -XX:NonNMethodCodeHeapSize= 2991 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) { 2992 julong long_NonNMethodCodeHeapSize = 0; 2993 2994 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1); 2995 if (errcode != arg_in_range) { 2996 jio_fprintf(defaultStream::error_stream(), 2997 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString); 2998 return JNI_EINVAL; 2999 } 3000 FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize); 3001 // -XX:ProfiledCodeHeapSize= 3002 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) { 3003 julong long_ProfiledCodeHeapSize = 0; 3004 3005 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1); 3006 if (errcode != arg_in_range) { 3007 jio_fprintf(defaultStream::error_stream(), 3008 "Invalid maximum profiled code heap size: %s.\n", option->optionString); 3009 return JNI_EINVAL; 3010 } 3011 FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize); 3012 // -XX:NonProfiledCodeHeapSizee= 3013 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) { 3014 julong long_NonProfiledCodeHeapSize = 0; 3015 3016 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1); 3017 if (errcode != arg_in_range) { 3018 jio_fprintf(defaultStream::error_stream(), 3019 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString); 3020 return JNI_EINVAL; 3021 } 3022 FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize); 3023 //-XX:IncreaseFirstTierCompileThresholdAt= 3024 } else if (match_option(option, "-XX:IncreaseFirstTierCompileThresholdAt=", &tail)) { 3025 uintx uint_IncreaseFirstTierCompileThresholdAt = 0; 3026 if (!parse_uintx(tail, &uint_IncreaseFirstTierCompileThresholdAt, 0) || uint_IncreaseFirstTierCompileThresholdAt > 99) { 3027 jio_fprintf(defaultStream::error_stream(), 3028 "Invalid value for IncreaseFirstTierCompileThresholdAt: %s. Should be between 0 and 99.\n", 3029 option->optionString); 3030 return JNI_EINVAL; 3031 } 3032 FLAG_SET_CMDLINE(uintx, IncreaseFirstTierCompileThresholdAt, (uintx)uint_IncreaseFirstTierCompileThresholdAt); 3033 // -green 3034 } else if (match_option(option, "-green", &tail)) { 3035 jio_fprintf(defaultStream::error_stream(), 3036 "Green threads support not available\n"); 3037 return JNI_EINVAL; 3038 // -native 3039 } else if (match_option(option, "-native", &tail)) { 3040 // HotSpot always uses native threads, ignore silently for compatibility 3041 // -Xsqnopause 3042 } else if (match_option(option, "-Xsqnopause", &tail)) { 3043 // EVM option, ignore silently for compatibility 3044 // -Xrs 3045 } else if (match_option(option, "-Xrs", &tail)) { 3046 // Classic/EVM option, new functionality 3047 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); 3048 } else if (match_option(option, "-Xusealtsigs", &tail)) { 3049 // change default internal VM signals used - lower case for back compat 3050 FLAG_SET_CMDLINE(bool, UseAltSigs, true); 3051 // -Xoptimize 3052 } else if (match_option(option, "-Xoptimize", &tail)) { 3053 // EVM option, ignore silently for compatibility 3054 // -Xprof 3055 } else if (match_option(option, "-Xprof", &tail)) { 3056 #if INCLUDE_FPROF 3057 _has_profile = true; 3058 #else // INCLUDE_FPROF 3059 jio_fprintf(defaultStream::error_stream(), 3060 "Flat profiling is not supported in this VM.\n"); 3061 return JNI_ERR; 3062 #endif // INCLUDE_FPROF 3063 // -Xconcurrentio 3064 } else if (match_option(option, "-Xconcurrentio", &tail)) { 3065 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); 3066 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); 3067 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); 3068 FLAG_SET_CMDLINE(bool, UseTLAB, false); 3069 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation 3070 3071 // -Xinternalversion 3072 } else if (match_option(option, "-Xinternalversion", &tail)) { 3073 jio_fprintf(defaultStream::output_stream(), "%s\n", 3074 VM_Version::internal_vm_info_string()); 3075 vm_exit(0); 3076 #ifndef PRODUCT 3077 // -Xprintflags 3078 } else if (match_option(option, "-Xprintflags", &tail)) { 3079 CommandLineFlags::printFlags(tty, false); 3080 vm_exit(0); 3081 #endif 3082 // -D 3083 } else if (match_option(option, "-D", &tail)) { 3084 if (!add_property(tail)) { 3085 return JNI_ENOMEM; 3086 } 3087 // Out of the box management support 3088 if (match_option(option, "-Dcom.sun.management", &tail)) { 3089 #if INCLUDE_MANAGEMENT 3090 FLAG_SET_CMDLINE(bool, ManagementServer, true); 3091 #else 3092 jio_fprintf(defaultStream::output_stream(), 3093 "-Dcom.sun.management is not supported in this VM.\n"); 3094 return JNI_ERR; 3095 #endif 3096 } 3097 // -Xint 3098 } else if (match_option(option, "-Xint", &tail)) { 3099 set_mode_flags(_int); 3100 // -Xmixed 3101 } else if (match_option(option, "-Xmixed", &tail)) { 3102 set_mode_flags(_mixed); 3103 // -Xcomp 3104 } else if (match_option(option, "-Xcomp", &tail)) { 3105 // for testing the compiler; turn off all flags that inhibit compilation 3106 set_mode_flags(_comp); 3107 // -Xshare:dump 3108 } else if (match_option(option, "-Xshare:dump", &tail)) { 3109 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); 3110 set_mode_flags(_int); // Prevent compilation, which creates objects 3111 // -Xshare:on 3112 } else if (match_option(option, "-Xshare:on", &tail)) { 3113 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3114 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 3115 // -Xshare:auto 3116 } else if (match_option(option, "-Xshare:auto", &tail)) { 3117 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3118 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 3119 // -Xshare:off 3120 } else if (match_option(option, "-Xshare:off", &tail)) { 3121 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); 3122 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); 3123 // -Xverify 3124 } else if (match_option(option, "-Xverify", &tail)) { 3125 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { 3126 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); 3127 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 3128 } else if (strcmp(tail, ":remote") == 0) { 3129 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 3130 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); 3131 } else if (strcmp(tail, ":none") == 0) { 3132 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); 3133 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); 3134 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { 3135 return JNI_EINVAL; 3136 } 3137 // -Xdebug 3138 } else if (match_option(option, "-Xdebug", &tail)) { 3139 // note this flag has been used, then ignore 3140 set_xdebug_mode(true); 3141 // -Xnoagent 3142 } else if (match_option(option, "-Xnoagent", &tail)) { 3143 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. 3144 } else if (match_option(option, "-Xboundthreads", &tail)) { 3145 // Bind user level threads to kernel threads (Solaris only) 3146 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); 3147 } else if (match_option(option, "-Xloggc:", &tail)) { 3148 // Redirect GC output to the file. -Xloggc:<filename> 3149 // ostream_init_log(), when called will use this filename 3150 // to initialize a fileStream. 3151 _gc_log_filename = os::strdup_check_oom(tail); 3152 if (!is_filename_valid(_gc_log_filename)) { 3153 jio_fprintf(defaultStream::output_stream(), 3154 "Invalid file name for use with -Xloggc: Filename can only contain the " 3155 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n" 3156 "Note %%p or %%t can only be used once\n", _gc_log_filename); 3157 return JNI_EINVAL; 3158 } 3159 FLAG_SET_CMDLINE(bool, PrintGC, true); 3160 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); 3161 3162 // JNI hooks 3163 } else if (match_option(option, "-Xcheck", &tail)) { 3164 if (!strcmp(tail, ":jni")) { 3165 #if !INCLUDE_JNI_CHECK 3166 warning("JNI CHECKING is not supported in this VM"); 3167 #else 3168 CheckJNICalls = true; 3169 #endif // INCLUDE_JNI_CHECK 3170 } else if (is_bad_option(option, args->ignoreUnrecognized, 3171 "check")) { 3172 return JNI_EINVAL; 3173 } 3174 } else if (match_option(option, "vfprintf", &tail)) { 3175 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); 3176 } else if (match_option(option, "exit", &tail)) { 3177 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); 3178 } else if (match_option(option, "abort", &tail)) { 3179 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); 3180 // -XX:+AggressiveHeap 3181 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { 3182 3183 // This option inspects the machine and attempts to set various 3184 // parameters to be optimal for long-running, memory allocation 3185 // intensive jobs. It is intended for machines with large 3186 // amounts of cpu and memory. 3187 3188 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit 3189 // VM, but we may not be able to represent the total physical memory 3190 // available (like having 8gb of memory on a box but using a 32bit VM). 3191 // Thus, we need to make sure we're using a julong for intermediate 3192 // calculations. 3193 julong initHeapSize; 3194 julong total_memory = os::physical_memory(); 3195 3196 if (total_memory < (julong)256*M) { 3197 jio_fprintf(defaultStream::error_stream(), 3198 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); 3199 vm_exit(1); 3200 } 3201 3202 // The heap size is half of available memory, or (at most) 3203 // all of possible memory less 160mb (leaving room for the OS 3204 // when using ISM). This is the maximum; because adaptive sizing 3205 // is turned on below, the actual space used may be smaller. 3206 3207 initHeapSize = MIN2(total_memory / (julong)2, 3208 total_memory - (julong)160*M); 3209 3210 initHeapSize = limit_by_allocatable_memory(initHeapSize); 3211 3212 if (FLAG_IS_DEFAULT(MaxHeapSize)) { 3213 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); 3214 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); 3215 // Currently the minimum size and the initial heap sizes are the same. 3216 set_min_heap_size(initHeapSize); 3217 } 3218 if (FLAG_IS_DEFAULT(NewSize)) { 3219 // Make the young generation 3/8ths of the total heap. 3220 FLAG_SET_CMDLINE(uintx, NewSize, 3221 ((julong)MaxHeapSize / (julong)8) * (julong)3); 3222 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); 3223 } 3224 3225 #ifndef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. 3226 FLAG_SET_DEFAULT(UseLargePages, true); 3227 #endif 3228 3229 // Increase some data structure sizes for efficiency 3230 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); 3231 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 3232 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); 3233 3234 // See the OldPLABSize comment below, but replace 'after promotion' 3235 // with 'after copying'. YoungPLABSize is the size of the survivor 3236 // space per-gc-thread buffers. The default is 4kw. 3237 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words 3238 3239 // OldPLABSize is the size of the buffers in the old gen that 3240 // UseParallelGC uses to promote live data that doesn't fit in the 3241 // survivor spaces. At any given time, there's one for each gc thread. 3242 // The default size is 1kw. These buffers are rarely used, since the 3243 // survivor spaces are usually big enough. For specjbb, however, there 3244 // are occasions when there's lots of live data in the young gen 3245 // and we end up promoting some of it. We don't have a definite 3246 // explanation for why bumping OldPLABSize helps, but the theory 3247 // is that a bigger PLAB results in retaining something like the 3248 // original allocation order after promotion, which improves mutator 3249 // locality. A minor effect may be that larger PLABs reduce the 3250 // number of PLAB allocation events during gc. The value of 8kw 3251 // was arrived at by experimenting with specjbb. 3252 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words 3253 3254 // Enable parallel GC and adaptive generation sizing 3255 FLAG_SET_CMDLINE(bool, UseParallelGC, true); 3256 FLAG_SET_DEFAULT(ParallelGCThreads, 3257 Abstract_VM_Version::parallel_worker_threads()); 3258 3259 // Encourage steady state memory management 3260 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); 3261 3262 // This appears to improve mutator locality 3263 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 3264 3265 // Get around early Solaris scheduling bug 3266 // (affinity vs other jobs on system) 3267 // but disallow DR and offlining (5008695). 3268 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); 3269 3270 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure; 3271 // and the last option wins. 3272 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { 3273 FLAG_SET_CMDLINE(bool, NeverTenure, true); 3274 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 3275 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1); 3276 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { 3277 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3278 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 3279 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0); 3280 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { 3281 uintx max_tenuring_thresh = 0; 3282 if(!parse_uintx(tail, &max_tenuring_thresh, 0)) { 3283 jio_fprintf(defaultStream::error_stream(), 3284 "Invalid MaxTenuringThreshold: %s\n", option->optionString); 3285 } 3286 FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh); 3287 3288 if (MaxTenuringThreshold == 0) { 3289 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3290 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); 3291 } else { 3292 FLAG_SET_CMDLINE(bool, NeverTenure, false); 3293 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); 3294 } 3295 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || 3296 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { 3297 jio_fprintf(defaultStream::error_stream(), 3298 "Please use CMSClassUnloadingEnabled in place of " 3299 "CMSPermGenSweepingEnabled in the future\n"); 3300 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { 3301 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); 3302 jio_fprintf(defaultStream::error_stream(), 3303 "Please use -XX:+UseGCOverheadLimit in place of " 3304 "-XX:+UseGCTimeLimit in the future\n"); 3305 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { 3306 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); 3307 jio_fprintf(defaultStream::error_stream(), 3308 "Please use -XX:-UseGCOverheadLimit in place of " 3309 "-XX:-UseGCTimeLimit in the future\n"); 3310 // The TLE options are for compatibility with 1.3 and will be 3311 // removed without notice in a future release. These options 3312 // are not to be documented. 3313 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { 3314 // No longer used. 3315 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { 3316 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); 3317 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { 3318 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); 3319 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { 3320 FLAG_SET_CMDLINE(bool, PrintTLAB, true); 3321 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { 3322 FLAG_SET_CMDLINE(bool, PrintTLAB, false); 3323 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { 3324 // No longer used. 3325 } else if (match_option(option, "-XX:TLESize=", &tail)) { 3326 julong long_tlab_size = 0; 3327 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); 3328 if (errcode != arg_in_range) { 3329 jio_fprintf(defaultStream::error_stream(), 3330 "Invalid TLAB size: %s\n", option->optionString); 3331 describe_range_error(errcode); 3332 return JNI_EINVAL; 3333 } 3334 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); 3335 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { 3336 // No longer used. 3337 } else if (match_option(option, "-XX:+UseTLE", &tail)) { 3338 FLAG_SET_CMDLINE(bool, UseTLAB, true); 3339 } else if (match_option(option, "-XX:-UseTLE", &tail)) { 3340 FLAG_SET_CMDLINE(bool, UseTLAB, false); 3341 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { 3342 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); 3343 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); 3344 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { 3345 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); 3346 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); 3347 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { 3348 #if defined(DTRACE_ENABLED) 3349 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); 3350 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); 3351 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); 3352 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); 3353 #else // defined(DTRACE_ENABLED) 3354 jio_fprintf(defaultStream::error_stream(), 3355 "ExtendedDTraceProbes flag is not applicable for this configuration\n"); 3356 return JNI_EINVAL; 3357 #endif // defined(DTRACE_ENABLED) 3358 #ifdef ASSERT 3359 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { 3360 FLAG_SET_CMDLINE(bool, FullGCALot, true); 3361 // disable scavenge before parallel mark-compact 3362 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); 3363 #endif 3364 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { 3365 julong cms_blocks_to_claim = (julong)atol(tail); 3366 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 3367 jio_fprintf(defaultStream::error_stream(), 3368 "Please use -XX:OldPLABSize in place of " 3369 "-XX:CMSParPromoteBlocksToClaim in the future\n"); 3370 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { 3371 julong cms_blocks_to_claim = (julong)atol(tail); 3372 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); 3373 jio_fprintf(defaultStream::error_stream(), 3374 "Please use -XX:OldPLABSize in place of " 3375 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); 3376 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { 3377 julong old_plab_size = 0; 3378 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); 3379 if (errcode != arg_in_range) { 3380 jio_fprintf(defaultStream::error_stream(), 3381 "Invalid old PLAB size: %s\n", option->optionString); 3382 describe_range_error(errcode); 3383 return JNI_EINVAL; 3384 } 3385 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); 3386 jio_fprintf(defaultStream::error_stream(), 3387 "Please use -XX:OldPLABSize in place of " 3388 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); 3389 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { 3390 julong young_plab_size = 0; 3391 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); 3392 if (errcode != arg_in_range) { 3393 jio_fprintf(defaultStream::error_stream(), 3394 "Invalid young PLAB size: %s\n", option->optionString); 3395 describe_range_error(errcode); 3396 return JNI_EINVAL; 3397 } 3398 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); 3399 jio_fprintf(defaultStream::error_stream(), 3400 "Please use -XX:YoungPLABSize in place of " 3401 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); 3402 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || 3403 match_option(option, "-XX:G1MarkStackSize=", &tail)) { 3404 julong stack_size = 0; 3405 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); 3406 if (errcode != arg_in_range) { 3407 jio_fprintf(defaultStream::error_stream(), 3408 "Invalid mark stack size: %s\n", option->optionString); 3409 describe_range_error(errcode); 3410 return JNI_EINVAL; 3411 } 3412 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); 3413 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { 3414 julong max_stack_size = 0; 3415 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); 3416 if (errcode != arg_in_range) { 3417 jio_fprintf(defaultStream::error_stream(), 3418 "Invalid maximum mark stack size: %s\n", 3419 option->optionString); 3420 describe_range_error(errcode); 3421 return JNI_EINVAL; 3422 } 3423 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); 3424 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || 3425 match_option(option, "-XX:ParallelCMSThreads=", &tail)) { 3426 uintx conc_threads = 0; 3427 if (!parse_uintx(tail, &conc_threads, 1)) { 3428 jio_fprintf(defaultStream::error_stream(), 3429 "Invalid concurrent threads: %s\n", option->optionString); 3430 return JNI_EINVAL; 3431 } 3432 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); 3433 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) { 3434 julong max_direct_memory_size = 0; 3435 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0); 3436 if (errcode != arg_in_range) { 3437 jio_fprintf(defaultStream::error_stream(), 3438 "Invalid maximum direct memory size: %s\n", 3439 option->optionString); 3440 describe_range_error(errcode); 3441 return JNI_EINVAL; 3442 } 3443 FLAG_SET_CMDLINE(uintx, MaxDirectMemorySize, max_direct_memory_size); 3444 #if !INCLUDE_MANAGEMENT 3445 } else if (match_option(option, "-XX:+ManagementServer", &tail)) { 3446 jio_fprintf(defaultStream::error_stream(), 3447 "ManagementServer is not supported in this VM.\n"); 3448 return JNI_ERR; 3449 #endif // INCLUDE_MANAGEMENT 3450 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx 3451 // Skip -XX:Flags= since that case has already been handled 3452 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { 3453 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { 3454 return JNI_EINVAL; 3455 } 3456 } 3457 // Unknown option 3458 } else if (is_bad_option(option, args->ignoreUnrecognized)) { 3459 return JNI_ERR; 3460 } 3461 } 3462 3463 // PrintSharedArchiveAndExit will turn on 3464 // -Xshare:on 3465 // -XX:+TraceClassPaths 3466 if (PrintSharedArchiveAndExit) { 3467 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); 3468 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); 3469 FLAG_SET_CMDLINE(bool, TraceClassPaths, true); 3470 } 3471 3472 // Change the default value for flags which have different default values 3473 // when working with older JDKs. 3474 #ifdef LINUX 3475 if (JDK_Version::current().compare_major(6) <= 0 && 3476 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { 3477 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); 3478 } 3479 #endif // LINUX 3480 fix_appclasspath(); 3481 return JNI_OK; 3482 } 3483 3484 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled) 3485 // 3486 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar 3487 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar". 3488 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty 3489 // path is treated as the current directory. 3490 // 3491 // This causes problems with CDS, which requires that all directories specified in the classpath 3492 // must be empty. In most cases, applications do NOT want to load classes from the current 3493 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up 3494 // scripts compatible with CDS. 3495 void Arguments::fix_appclasspath() { 3496 if (IgnoreEmptyClassPaths) { 3497 const char separator = *os::path_separator(); 3498 const char* src = _java_class_path->value(); 3499 3500 // skip over all the leading empty paths 3501 while (*src == separator) { 3502 src ++; 3503 } 3504 3505 char* copy = AllocateHeap(strlen(src) + 1, mtInternal); 3506 strncpy(copy, src, strlen(src) + 1); 3507 3508 // trim all trailing empty paths 3509 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) { 3510 *tail = '\0'; 3511 } 3512 3513 char from[3] = {separator, separator, '\0'}; 3514 char to [2] = {separator, '\0'}; 3515 while (StringUtils::replace_no_expand(copy, from, to) > 0) { 3516 // Keep replacing "::" -> ":" until we have no more "::" (non-windows) 3517 // Keep replacing ";;" -> ";" until we have no more ";;" (windows) 3518 } 3519 3520 _java_class_path->set_value(copy); 3521 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore 3522 } 3523 3524 if (!PrintSharedArchiveAndExit) { 3525 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value()); 3526 } 3527 } 3528 3529 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { 3530 // This must be done after all -D arguments have been processed. 3531 scp_p->expand_endorsed(); 3532 3533 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { 3534 // Assemble the bootclasspath elements into the final path. 3535 Arguments::set_sysclasspath(scp_p->combined_path()); 3536 } 3537 3538 // This must be done after all arguments have been processed. 3539 // java_compiler() true means set to "NONE" or empty. 3540 if (java_compiler() && !xdebug_mode()) { 3541 // For backwards compatibility, we switch to interpreted mode if 3542 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was 3543 // not specified. 3544 set_mode_flags(_int); 3545 } 3546 3547 if ((TieredCompilation && CompileThresholdScaling == 0) 3548 || (!TieredCompilation && get_scaled_compile_threshold(CompileThreshold) == 0)) { 3549 set_mode_flags(_int); 3550 } 3551 3552 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set 3553 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { 3554 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); 3555 } 3556 3557 #ifndef COMPILER2 3558 // Don't degrade server performance for footprint 3559 if (FLAG_IS_DEFAULT(UseLargePages) && 3560 MaxHeapSize < LargePageHeapSizeThreshold) { 3561 // No need for large granularity pages w/small heaps. 3562 // Note that large pages are enabled/disabled for both the 3563 // Java heap and the code cache. 3564 FLAG_SET_DEFAULT(UseLargePages, false); 3565 } 3566 3567 #else 3568 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { 3569 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); 3570 } 3571 #endif 3572 3573 #ifndef TIERED 3574 // Tiered compilation is undefined. 3575 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation"); 3576 #endif 3577 3578 // If we are running in a headless jre, force java.awt.headless property 3579 // to be true unless the property has already been set. 3580 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. 3581 if (os::is_headless_jre()) { 3582 const char* headless = Arguments::get_property("java.awt.headless"); 3583 if (headless == NULL) { 3584 char envbuffer[128]; 3585 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) { 3586 if (!add_property("java.awt.headless=true")) { 3587 return JNI_ENOMEM; 3588 } 3589 } else { 3590 char buffer[256]; 3591 strcpy(buffer, "java.awt.headless="); 3592 strcat(buffer, envbuffer); 3593 if (!add_property(buffer)) { 3594 return JNI_ENOMEM; 3595 } 3596 } 3597 } 3598 } 3599 3600 if (!ArgumentsExt::check_vm_args_consistency()) { 3601 return JNI_ERR; 3602 } 3603 3604 return JNI_OK; 3605 } 3606 3607 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 3608 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, 3609 scp_assembly_required_p); 3610 } 3611 3612 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { 3613 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, 3614 scp_assembly_required_p); 3615 } 3616 3617 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { 3618 const int N_MAX_OPTIONS = 64; 3619 const int OPTION_BUFFER_SIZE = 1024; 3620 char buffer[OPTION_BUFFER_SIZE]; 3621 3622 // The variable will be ignored if it exceeds the length of the buffer. 3623 // Don't check this variable if user has special privileges 3624 // (e.g. unix su command). 3625 if (os::getenv(name, buffer, sizeof(buffer)) && 3626 !os::have_special_privileges()) { 3627 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array 3628 jio_fprintf(defaultStream::error_stream(), 3629 "Picked up %s: %s\n", name, buffer); 3630 char* rd = buffer; // pointer to the input string (rd) 3631 int i; 3632 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string 3633 while (isspace(*rd)) rd++; // skip whitespace 3634 if (*rd == 0) break; // we re done when the input string is read completely 3635 3636 // The output, option string, overwrites the input string. 3637 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to 3638 // input string (rd). 3639 char* wrt = rd; 3640 3641 options[i++].optionString = wrt; // Fill in option 3642 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL 3643 if (*rd == '\'' || *rd == '"') { // handle a quoted string 3644 int quote = *rd; // matching quote to look for 3645 rd++; // don't copy open quote 3646 while (*rd != quote) { // include everything (even spaces) up until quote 3647 if (*rd == 0) { // string termination means unmatched string 3648 jio_fprintf(defaultStream::error_stream(), 3649 "Unmatched quote in %s\n", name); 3650 return JNI_ERR; 3651 } 3652 *wrt++ = *rd++; // copy to option string 3653 } 3654 rd++; // don't copy close quote 3655 } else { 3656 *wrt++ = *rd++; // copy to option string 3657 } 3658 } 3659 // Need to check if we're done before writing a NULL, 3660 // because the write could be to the byte that rd is pointing to. 3661 if (*rd++ == 0) { 3662 *wrt = 0; 3663 break; 3664 } 3665 *wrt = 0; // Zero terminate option 3666 } 3667 // Construct JavaVMInitArgs structure and parse as if it was part of the command line 3668 JavaVMInitArgs vm_args; 3669 vm_args.version = JNI_VERSION_1_2; 3670 vm_args.options = options; 3671 vm_args.nOptions = i; 3672 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; 3673 3674 if (PrintVMOptions) { 3675 const char* tail; 3676 for (int i = 0; i < vm_args.nOptions; i++) { 3677 const JavaVMOption *option = vm_args.options + i; 3678 if (match_option(option, "-XX:", &tail)) { 3679 logOption(tail); 3680 } 3681 } 3682 } 3683 3684 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, Flag::ENVIRON_VAR)); 3685 } 3686 return JNI_OK; 3687 } 3688 3689 void Arguments::set_shared_spaces_flags() { 3690 if (DumpSharedSpaces) { 3691 if (RequireSharedSpaces) { 3692 warning("cannot dump shared archive while using shared archive"); 3693 } 3694 UseSharedSpaces = false; 3695 #ifdef _LP64 3696 if (!UseCompressedOops || !UseCompressedClassPointers) { 3697 vm_exit_during_initialization( 3698 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); 3699 } 3700 } else { 3701 if (!UseCompressedOops || !UseCompressedClassPointers) { 3702 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); 3703 } 3704 #endif 3705 } 3706 } 3707 3708 #if !INCLUDE_ALL_GCS 3709 static void force_serial_gc() { 3710 FLAG_SET_DEFAULT(UseSerialGC, true); 3711 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption 3712 UNSUPPORTED_GC_OPTION(UseG1GC); 3713 UNSUPPORTED_GC_OPTION(UseParallelGC); 3714 UNSUPPORTED_GC_OPTION(UseParallelOldGC); 3715 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC); 3716 UNSUPPORTED_GC_OPTION(UseParNewGC); 3717 } 3718 #endif // INCLUDE_ALL_GCS 3719 3720 // Sharing support 3721 // Construct the path to the archive 3722 static char* get_shared_archive_path() { 3723 char *shared_archive_path; 3724 if (SharedArchiveFile == NULL) { 3725 char jvm_path[JVM_MAXPATHLEN]; 3726 os::jvm_path(jvm_path, sizeof(jvm_path)); 3727 char *end = strrchr(jvm_path, *os::file_separator()); 3728 if (end != NULL) *end = '\0'; 3729 size_t jvm_path_len = strlen(jvm_path); 3730 size_t file_sep_len = strlen(os::file_separator()); 3731 shared_archive_path = NEW_C_HEAP_ARRAY(char, jvm_path_len + 3732 file_sep_len + 20, mtInternal); 3733 if (shared_archive_path != NULL) { 3734 strncpy(shared_archive_path, jvm_path, jvm_path_len + 1); 3735 strncat(shared_archive_path, os::file_separator(), file_sep_len); 3736 strncat(shared_archive_path, "classes.jsa", 11); 3737 } 3738 } else { 3739 shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(SharedArchiveFile) + 1, mtInternal); 3740 if (shared_archive_path != NULL) { 3741 strncpy(shared_archive_path, SharedArchiveFile, strlen(SharedArchiveFile) + 1); 3742 } 3743 } 3744 return shared_archive_path; 3745 } 3746 3747 #ifndef PRODUCT 3748 // Determine whether LogVMOutput should be implicitly turned on. 3749 static bool use_vm_log() { 3750 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) || 3751 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods || 3752 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers || 3753 PrintAssembly || TraceDeoptimization || TraceDependencies || 3754 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) { 3755 return true; 3756 } 3757 3758 #ifdef COMPILER1 3759 if (PrintC1Statistics) { 3760 return true; 3761 } 3762 #endif // COMPILER1 3763 3764 #ifdef COMPILER2 3765 if (PrintOptoAssembly || PrintOptoStatistics) { 3766 return true; 3767 } 3768 #endif // COMPILER2 3769 3770 return false; 3771 } 3772 #endif // PRODUCT 3773 3774 // Parse entry point called from JNI_CreateJavaVM 3775 3776 jint Arguments::parse(const JavaVMInitArgs* args) { 3777 3778 // Remaining part of option string 3779 const char* tail; 3780 3781 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. 3782 const char* hotspotrc = ".hotspotrc"; 3783 bool settings_file_specified = false; 3784 bool needs_hotspotrc_warning = false; 3785 3786 const char* flags_file; 3787 int index; 3788 for (index = 0; index < args->nOptions; index++) { 3789 const JavaVMOption *option = args->options + index; 3790 if (ArgumentsExt::process_options(option)) { 3791 continue; 3792 } 3793 if (match_option(option, "-XX:Flags=", &tail)) { 3794 flags_file = tail; 3795 settings_file_specified = true; 3796 continue; 3797 } 3798 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { 3799 PrintVMOptions = true; 3800 continue; 3801 } 3802 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { 3803 PrintVMOptions = false; 3804 continue; 3805 } 3806 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { 3807 IgnoreUnrecognizedVMOptions = true; 3808 continue; 3809 } 3810 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { 3811 IgnoreUnrecognizedVMOptions = false; 3812 continue; 3813 } 3814 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { 3815 CommandLineFlags::printFlags(tty, false); 3816 vm_exit(0); 3817 } 3818 #if INCLUDE_NMT 3819 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { 3820 // The launcher did not setup nmt environment variable properly. 3821 if (!MemTracker::check_launcher_nmt_support(tail)) { 3822 warning("Native Memory Tracking did not setup properly, using wrong launcher?"); 3823 } 3824 3825 // Verify if nmt option is valid. 3826 if (MemTracker::verify_nmt_option()) { 3827 // Late initialization, still in single-threaded mode. 3828 if (MemTracker::tracking_level() >= NMT_summary) { 3829 MemTracker::init(); 3830 } 3831 } else { 3832 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); 3833 } 3834 continue; 3835 } 3836 #endif 3837 3838 3839 #ifndef PRODUCT 3840 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) { 3841 CommandLineFlags::printFlags(tty, true); 3842 vm_exit(0); 3843 } 3844 #endif 3845 } 3846 3847 if (IgnoreUnrecognizedVMOptions) { 3848 // uncast const to modify the flag args->ignoreUnrecognized 3849 *(jboolean*)(&args->ignoreUnrecognized) = true; 3850 } 3851 3852 // Parse specified settings file 3853 if (settings_file_specified) { 3854 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { 3855 return JNI_EINVAL; 3856 } 3857 } else { 3858 #ifdef ASSERT 3859 // Parse default .hotspotrc settings file 3860 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { 3861 return JNI_EINVAL; 3862 } 3863 #else 3864 struct stat buf; 3865 if (os::stat(hotspotrc, &buf) == 0) { 3866 needs_hotspotrc_warning = true; 3867 } 3868 #endif 3869 } 3870 3871 if (PrintVMOptions) { 3872 for (index = 0; index < args->nOptions; index++) { 3873 const JavaVMOption *option = args->options + index; 3874 if (match_option(option, "-XX:", &tail)) { 3875 logOption(tail); 3876 } 3877 } 3878 } 3879 3880 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS 3881 jint result = parse_vm_init_args(args); 3882 if (result != JNI_OK) { 3883 return result; 3884 } 3885 3886 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. 3887 SharedArchivePath = get_shared_archive_path(); 3888 if (SharedArchivePath == NULL) { 3889 return JNI_ENOMEM; 3890 } 3891 3892 // Set up VerifySharedSpaces 3893 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { 3894 VerifySharedSpaces = true; 3895 } 3896 3897 // Delay warning until here so that we've had a chance to process 3898 // the -XX:-PrintWarnings flag 3899 if (needs_hotspotrc_warning) { 3900 warning("%s file is present but has been ignored. " 3901 "Run with -XX:Flags=%s to load the file.", 3902 hotspotrc, hotspotrc); 3903 } 3904 3905 #ifdef _ALLBSD_SOURCE // UseLargePages is not yet supported on BSD. 3906 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages"); 3907 #endif 3908 3909 #if INCLUDE_ALL_GCS 3910 #if (defined JAVASE_EMBEDDED || defined ARM) 3911 UNSUPPORTED_OPTION(UseG1GC, "G1 GC"); 3912 #endif 3913 #endif 3914 3915 #ifndef PRODUCT 3916 if (TraceBytecodesAt != 0) { 3917 TraceBytecodes = true; 3918 } 3919 if (CountCompiledCalls) { 3920 if (UseCounterDecay) { 3921 warning("UseCounterDecay disabled because CountCalls is set"); 3922 UseCounterDecay = false; 3923 } 3924 } 3925 #endif // PRODUCT 3926 3927 if (ScavengeRootsInCode == 0) { 3928 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { 3929 warning("forcing ScavengeRootsInCode non-zero"); 3930 } 3931 ScavengeRootsInCode = 1; 3932 } 3933 3934 if (PrintGCDetails) { 3935 // Turn on -verbose:gc options as well 3936 PrintGC = true; 3937 } 3938 3939 // Set object alignment values. 3940 set_object_alignment(); 3941 3942 #if !INCLUDE_ALL_GCS 3943 force_serial_gc(); 3944 #endif // INCLUDE_ALL_GCS 3945 #if !INCLUDE_CDS 3946 if (DumpSharedSpaces || RequireSharedSpaces) { 3947 jio_fprintf(defaultStream::error_stream(), 3948 "Shared spaces are not supported in this VM\n"); 3949 return JNI_ERR; 3950 } 3951 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) { 3952 warning("Shared spaces are not supported in this VM"); 3953 FLAG_SET_DEFAULT(UseSharedSpaces, false); 3954 FLAG_SET_DEFAULT(PrintSharedSpaces, false); 3955 } 3956 no_shared_spaces("CDS Disabled"); 3957 #endif // INCLUDE_CDS 3958 3959 return JNI_OK; 3960 } 3961 3962 jint Arguments::apply_ergo() { 3963 3964 // Set flags based on ergonomics. 3965 set_ergonomics_flags(); 3966 3967 set_shared_spaces_flags(); 3968 3969 // Check the GC selections again. 3970 if (!ArgumentsExt::check_gc_consistency_ergo()) { 3971 return JNI_EINVAL; 3972 } 3973 3974 if (TieredCompilation) { 3975 set_tiered_flags(); 3976 } else { 3977 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup. 3978 if (CompilationPolicyChoice >= 2) { 3979 vm_exit_during_initialization( 3980 "Incompatible compilation policy selected", NULL); 3981 } 3982 // Scale CompileThreshold 3983 if (!FLAG_IS_DEFAULT(CompileThresholdScaling)) { 3984 FLAG_SET_ERGO(intx, CompileThreshold, get_scaled_compile_threshold(CompileThreshold)); 3985 } 3986 } 3987 3988 #ifdef COMPILER2 3989 #ifndef PRODUCT 3990 if (PrintIdealGraphLevel > 0) { 3991 FLAG_SET_ERGO(bool, PrintIdealGraph, true); 3992 } 3993 #endif 3994 #endif 3995 3996 // Set NmethodSweepFraction after the size of the code cache is adapted (in case of tiered) 3997 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { 3998 FLAG_SET_DEFAULT(NmethodSweepFraction, 1 + ReservedCodeCacheSize / (16 * M)); 3999 } 4000 4001 4002 // Set heap size based on available physical memory 4003 set_heap_size(); 4004 4005 set_gc_specific_flags(); 4006 4007 // Initialize Metaspace flags and alignments 4008 Metaspace::ergo_initialize(); 4009 4010 // Set bytecode rewriting flags 4011 set_bytecode_flags(); 4012 4013 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled 4014 set_aggressive_opts_flags(); 4015 4016 // Turn off biased locking for locking debug mode flags, 4017 // which are subtly different from each other but neither works with 4018 // biased locking 4019 if (UseHeavyMonitors 4020 #ifdef COMPILER1 4021 || !UseFastLocking 4022 #endif // COMPILER1 4023 ) { 4024 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { 4025 // flag set to true on command line; warn the user that they 4026 // can't enable biased locking here 4027 warning("Biased Locking is not supported with locking debug flags" 4028 "; ignoring UseBiasedLocking flag." ); 4029 } 4030 UseBiasedLocking = false; 4031 } 4032 4033 #ifdef ZERO 4034 // Clear flags not supported on zero. 4035 FLAG_SET_DEFAULT(ProfileInterpreter, false); 4036 FLAG_SET_DEFAULT(UseBiasedLocking, false); 4037 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); 4038 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); 4039 #endif // CC_INTERP 4040 4041 #ifdef COMPILER2 4042 if (!EliminateLocks) { 4043 EliminateNestedLocks = false; 4044 } 4045 if (!Inline) { 4046 IncrementalInline = false; 4047 } 4048 #ifndef PRODUCT 4049 if (!IncrementalInline) { 4050 AlwaysIncrementalInline = false; 4051 } 4052 #endif 4053 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { 4054 // nothing to use the profiling, turn if off 4055 FLAG_SET_DEFAULT(TypeProfileLevel, 0); 4056 } 4057 #endif 4058 4059 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { 4060 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); 4061 DebugNonSafepoints = true; 4062 } 4063 4064 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) { 4065 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used"); 4066 } 4067 4068 #ifndef PRODUCT 4069 if (CompileTheWorld) { 4070 // Force NmethodSweeper to sweep whole CodeCache each time. 4071 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { 4072 NmethodSweepFraction = 1; 4073 } 4074 } 4075 4076 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { 4077 if (use_vm_log()) { 4078 LogVMOutput = true; 4079 } 4080 } 4081 #endif // PRODUCT 4082 4083 if (PrintCommandLineFlags) { 4084 CommandLineFlags::printSetFlags(tty); 4085 } 4086 4087 // Apply CPU specific policy for the BiasedLocking 4088 if (UseBiasedLocking) { 4089 if (!VM_Version::use_biased_locking() && 4090 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { 4091 UseBiasedLocking = false; 4092 } 4093 } 4094 #ifdef COMPILER2 4095 if (!UseBiasedLocking || EmitSync != 0) { 4096 UseOptoBiasInlining = false; 4097 } 4098 #endif 4099 4100 return JNI_OK; 4101 } 4102 4103 jint Arguments::adjust_after_os() { 4104 if (UseNUMA) { 4105 if (UseParallelGC || UseParallelOldGC) { 4106 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { 4107 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); 4108 } 4109 } 4110 // UseNUMAInterleaving is set to ON for all collectors and 4111 // platforms when UseNUMA is set to ON. NUMA-aware collectors 4112 // such as the parallel collector for Linux and Solaris will 4113 // interleave old gen and survivor spaces on top of NUMA 4114 // allocation policy for the eden space. 4115 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on 4116 // all platforms and ParallelGC on Windows will interleave all 4117 // of the heap spaces across NUMA nodes. 4118 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { 4119 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); 4120 } 4121 } 4122 return JNI_OK; 4123 } 4124 4125 int Arguments::PropertyList_count(SystemProperty* pl) { 4126 int count = 0; 4127 while(pl != NULL) { 4128 count++; 4129 pl = pl->next(); 4130 } 4131 return count; 4132 } 4133 4134 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { 4135 assert(key != NULL, "just checking"); 4136 SystemProperty* prop; 4137 for (prop = pl; prop != NULL; prop = prop->next()) { 4138 if (strcmp(key, prop->key()) == 0) return prop->value(); 4139 } 4140 return NULL; 4141 } 4142 4143 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { 4144 int count = 0; 4145 const char* ret_val = NULL; 4146 4147 while(pl != NULL) { 4148 if(count >= index) { 4149 ret_val = pl->key(); 4150 break; 4151 } 4152 count++; 4153 pl = pl->next(); 4154 } 4155 4156 return ret_val; 4157 } 4158 4159 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { 4160 int count = 0; 4161 char* ret_val = NULL; 4162 4163 while(pl != NULL) { 4164 if(count >= index) { 4165 ret_val = pl->value(); 4166 break; 4167 } 4168 count++; 4169 pl = pl->next(); 4170 } 4171 4172 return ret_val; 4173 } 4174 4175 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { 4176 SystemProperty* p = *plist; 4177 if (p == NULL) { 4178 *plist = new_p; 4179 } else { 4180 while (p->next() != NULL) { 4181 p = p->next(); 4182 } 4183 p->set_next(new_p); 4184 } 4185 } 4186 4187 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { 4188 if (plist == NULL) 4189 return; 4190 4191 SystemProperty* new_p = new SystemProperty(k, v, true); 4192 PropertyList_add(plist, new_p); 4193 } 4194 4195 // This add maintains unique property key in the list. 4196 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { 4197 if (plist == NULL) 4198 return; 4199 4200 // If property key exist then update with new value. 4201 SystemProperty* prop; 4202 for (prop = *plist; prop != NULL; prop = prop->next()) { 4203 if (strcmp(k, prop->key()) == 0) { 4204 if (append) { 4205 prop->append_value(v); 4206 } else { 4207 prop->set_value(v); 4208 } 4209 return; 4210 } 4211 } 4212 4213 PropertyList_add(plist, k, v); 4214 } 4215 4216 // Copies src into buf, replacing "%%" with "%" and "%p" with pid 4217 // Returns true if all of the source pointed by src has been copied over to 4218 // the destination buffer pointed by buf. Otherwise, returns false. 4219 // Notes: 4220 // 1. If the length (buflen) of the destination buffer excluding the 4221 // NULL terminator character is not long enough for holding the expanded 4222 // pid characters, it also returns false instead of returning the partially 4223 // expanded one. 4224 // 2. The passed in "buflen" should be large enough to hold the null terminator. 4225 bool Arguments::copy_expand_pid(const char* src, size_t srclen, 4226 char* buf, size_t buflen) { 4227 const char* p = src; 4228 char* b = buf; 4229 const char* src_end = &src[srclen]; 4230 char* buf_end = &buf[buflen - 1]; 4231 4232 while (p < src_end && b < buf_end) { 4233 if (*p == '%') { 4234 switch (*(++p)) { 4235 case '%': // "%%" ==> "%" 4236 *b++ = *p++; 4237 break; 4238 case 'p': { // "%p" ==> current process id 4239 // buf_end points to the character before the last character so 4240 // that we could write '\0' to the end of the buffer. 4241 size_t buf_sz = buf_end - b + 1; 4242 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); 4243 4244 // if jio_snprintf fails or the buffer is not long enough to hold 4245 // the expanded pid, returns false. 4246 if (ret < 0 || ret >= (int)buf_sz) { 4247 return false; 4248 } else { 4249 b += ret; 4250 assert(*b == '\0', "fail in copy_expand_pid"); 4251 if (p == src_end && b == buf_end + 1) { 4252 // reach the end of the buffer. 4253 return true; 4254 } 4255 } 4256 p++; 4257 break; 4258 } 4259 default : 4260 *b++ = '%'; 4261 } 4262 } else { 4263 *b++ = *p++; 4264 } 4265 } 4266 *b = '\0'; 4267 return (p == src_end); // return false if not all of the source was copied 4268 }