1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/classLoader.hpp" 27 #include "classfile/stringTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "code/codeCache.hpp" 30 #include "compiler/compileBroker.hpp" 31 #include "compiler/compilerOracle.hpp" 32 #include "gc/shared/genCollectedHeap.hpp" 33 #include "interpreter/bytecodeHistogram.hpp" 34 #if INCLUDE_JVMCI 35 #include "jvmci/jvmciCompiler.hpp" 36 #include "jvmci/jvmciRuntime.hpp" 37 #endif 38 #include "memory/oopFactory.hpp" 39 #include "memory/universe.hpp" 40 #include "oops/constantPool.hpp" 41 #include "oops/generateOopMap.hpp" 42 #include "oops/instanceKlass.hpp" 43 #include "oops/instanceOop.hpp" 44 #include "oops/method.hpp" 45 #include "oops/objArrayOop.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "oops/symbol.hpp" 48 #include "prims/jvmtiExport.hpp" 49 #include "runtime/arguments.hpp" 50 #include "runtime/biasedLocking.hpp" 51 #include "runtime/compilationPolicy.hpp" 52 #include "runtime/fprofiler.hpp" 53 #include "runtime/init.hpp" 54 #include "runtime/interfaceSupport.hpp" 55 #include "runtime/java.hpp" 56 #include "runtime/memprofiler.hpp" 57 #include "runtime/sharedRuntime.hpp" 58 #include "runtime/statSampler.hpp" 59 #include "runtime/sweeper.hpp" 60 #include "runtime/task.hpp" 61 #include "runtime/thread.inline.hpp" 62 #include "runtime/timer.hpp" 63 #include "runtime/vm_operations.hpp" 64 #include "services/memTracker.hpp" 65 #include "trace/tracing.hpp" 66 #include "utilities/dtrace.hpp" 67 #include "utilities/globalDefinitions.hpp" 68 #include "utilities/histogram.hpp" 69 #include "utilities/macros.hpp" 70 #include "utilities/vmError.hpp" 71 #if INCLUDE_ALL_GCS 72 #include "gc/cms/concurrentMarkSweepThread.hpp" 73 #include "gc/parallel/psScavenge.hpp" 74 #endif // INCLUDE_ALL_GCS 75 #ifdef COMPILER1 76 #include "c1/c1_Compiler.hpp" 77 #include "c1/c1_Runtime1.hpp" 78 #endif 79 #ifdef COMPILER2 80 #include "code/compiledIC.hpp" 81 #include "compiler/methodLiveness.hpp" 82 #include "opto/compile.hpp" 83 #include "opto/indexSet.hpp" 84 #include "opto/runtime.hpp" 85 #endif 86 87 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 88 89 GrowableArray<Method*>* collected_profiled_methods; 90 91 int compare_methods(Method** a, Method** b) { 92 // %%% there can be 32-bit overflow here 93 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 94 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 95 } 96 97 void collect_profiled_methods(Method* m) { 98 Thread* thread = Thread::current(); 99 // This HandleMark prevents a huge amount of handles from being added 100 // to the metadata_handles() array on the thread. 101 HandleMark hm(thread); 102 methodHandle mh(thread, m); 103 if ((m->method_data() != NULL) && 104 (PrintMethodData || CompilerOracle::should_print(mh))) { 105 collected_profiled_methods->push(m); 106 } 107 } 108 109 void print_method_profiling_data() { 110 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) && 111 (PrintMethodData || CompilerOracle::should_print_methods())) { 112 ResourceMark rm; 113 HandleMark hm; 114 collected_profiled_methods = new GrowableArray<Method*>(1024); 115 ClassLoaderDataGraph::methods_do(collect_profiled_methods); 116 collected_profiled_methods->sort(&compare_methods); 117 118 int count = collected_profiled_methods->length(); 119 int total_size = 0; 120 if (count > 0) { 121 for (int index = 0; index < count; index++) { 122 Method* m = collected_profiled_methods->at(index); 123 ttyLocker ttyl; 124 tty->print_cr("------------------------------------------------------------------------"); 125 m->print_invocation_count(); 126 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 127 tty->cr(); 128 // Dump data on parameters if any 129 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 130 tty->fill_to(2); 131 m->method_data()->parameters_type_data()->print_data_on(tty); 132 } 133 m->print_codes(); 134 total_size += m->method_data()->size_in_bytes(); 135 } 136 tty->print_cr("------------------------------------------------------------------------"); 137 tty->print_cr("Total MDO size: %d bytes", total_size); 138 } 139 } 140 } 141 142 143 #ifndef PRODUCT 144 145 // Statistics printing (method invocation histogram) 146 147 GrowableArray<Method*>* collected_invoked_methods; 148 149 void collect_invoked_methods(Method* m) { 150 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 151 collected_invoked_methods->push(m); 152 } 153 } 154 155 156 157 158 void print_method_invocation_histogram() { 159 ResourceMark rm; 160 HandleMark hm; 161 collected_invoked_methods = new GrowableArray<Method*>(1024); 162 SystemDictionary::methods_do(collect_invoked_methods); 163 collected_invoked_methods->sort(&compare_methods); 164 // 165 tty->cr(); 166 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 167 tty->cr(); 168 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 169 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 170 synch_total = 0, nativ_total = 0, acces_total = 0; 171 for (int index = 0; index < collected_invoked_methods->length(); index++) { 172 Method* m = collected_invoked_methods->at(index); 173 int c = m->invocation_count() + m->compiled_invocation_count(); 174 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 175 int_total += m->invocation_count(); 176 comp_total += m->compiled_invocation_count(); 177 if (m->is_final()) final_total += c; 178 if (m->is_static()) static_total += c; 179 if (m->is_synchronized()) synch_total += c; 180 if (m->is_native()) nativ_total += c; 181 if (m->is_accessor()) acces_total += c; 182 } 183 tty->cr(); 184 total = int_total + comp_total; 185 tty->print_cr("Invocations summary:"); 186 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 187 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 188 tty->print_cr("\t%9d (100%%) total", total); 189 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 190 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 191 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 192 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 193 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 194 tty->cr(); 195 SharedRuntime::print_call_statistics(comp_total); 196 } 197 198 void print_bytecode_count() { 199 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 200 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 201 } 202 } 203 204 AllocStats alloc_stats; 205 206 207 208 // General statistics printing (profiling ...) 209 void print_statistics() { 210 #ifdef ASSERT 211 212 if (CountRuntimeCalls) { 213 extern Histogram *RuntimeHistogram; 214 RuntimeHistogram->print(); 215 } 216 217 if (CountJNICalls) { 218 extern Histogram *JNIHistogram; 219 JNIHistogram->print(); 220 } 221 222 if (CountJVMCalls) { 223 extern Histogram *JVMHistogram; 224 JVMHistogram->print(); 225 } 226 227 #endif 228 229 if (MemProfiling) { 230 MemProfiler::disengage(); 231 } 232 233 if (CITime) { 234 CompileBroker::print_times(); 235 } 236 237 #ifdef COMPILER1 238 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 239 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 240 Runtime1::print_statistics(); 241 Deoptimization::print_statistics(); 242 SharedRuntime::print_statistics(); 243 } 244 #endif /* COMPILER1 */ 245 246 #ifdef COMPILER2 247 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 248 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 249 Compile::print_statistics(); 250 #ifndef COMPILER1 251 Deoptimization::print_statistics(); 252 SharedRuntime::print_statistics(); 253 #endif //COMPILER1 254 os::print_statistics(); 255 } 256 257 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 258 OptoRuntime::print_named_counters(); 259 } 260 261 if (TimeLivenessAnalysis) { 262 MethodLiveness::print_times(); 263 } 264 #ifdef ASSERT 265 if (CollectIndexSetStatistics) { 266 IndexSet::print_statistics(); 267 } 268 #endif // ASSERT 269 #else 270 #ifdef INCLUDE_JVMCI 271 #ifndef COMPILER1 272 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) { 273 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization); 274 Deoptimization::print_statistics(); 275 SharedRuntime::print_statistics(); 276 } 277 #endif 278 #endif 279 #endif 280 281 if (PrintNMethodStatistics) { 282 nmethod::print_statistics(); 283 } 284 if (CountCompiledCalls) { 285 print_method_invocation_histogram(); 286 } 287 288 print_method_profiling_data(); 289 290 if (TimeCompilationPolicy) { 291 CompilationPolicy::policy()->print_time(); 292 } 293 if (TimeOopMap) { 294 GenerateOopMap::print_time(); 295 } 296 if (ProfilerCheckIntervals) { 297 PeriodicTask::print_intervals(); 298 } 299 if (PrintSymbolTableSizeHistogram) { 300 SymbolTable::print_histogram(); 301 } 302 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 303 BytecodeCounter::print(); 304 } 305 if (PrintBytecodePairHistogram) { 306 BytecodePairHistogram::print(); 307 } 308 309 if (PrintCodeCache) { 310 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 311 CodeCache::print(); 312 } 313 314 if (PrintMethodFlushingStatistics) { 315 NMethodSweeper::print(); 316 } 317 318 if (PrintCodeCache2) { 319 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 320 CodeCache::print_internals(); 321 } 322 323 if (PrintVtableStats) { 324 klassVtable::print_statistics(); 325 klassItable::print_statistics(); 326 } 327 if (VerifyOops) { 328 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 329 } 330 331 print_bytecode_count(); 332 if (PrintMallocStatistics) { 333 tty->print("allocation stats: "); 334 alloc_stats.print(); 335 tty->cr(); 336 } 337 338 if (PrintSystemDictionaryAtExit) { 339 SystemDictionary::print(); 340 } 341 342 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 343 Method::print_touched_methods(tty); 344 } 345 346 if (PrintBiasedLockingStatistics) { 347 BiasedLocking::print_counters(); 348 } 349 350 // Native memory tracking data 351 if (PrintNMTStatistics) { 352 MemTracker::final_report(tty); 353 } 354 } 355 356 #else // PRODUCT MODE STATISTICS 357 358 void print_statistics() { 359 360 if (PrintMethodData) { 361 print_method_profiling_data(); 362 } 363 364 if (CITime) { 365 CompileBroker::print_times(); 366 } 367 368 if (PrintCodeCache) { 369 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 370 CodeCache::print(); 371 } 372 373 if (PrintMethodFlushingStatistics) { 374 NMethodSweeper::print(); 375 } 376 377 #ifdef COMPILER2 378 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 379 OptoRuntime::print_named_counters(); 380 } 381 #endif 382 if (PrintBiasedLockingStatistics) { 383 BiasedLocking::print_counters(); 384 } 385 386 // Native memory tracking data 387 if (PrintNMTStatistics) { 388 MemTracker::final_report(tty); 389 } 390 391 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 392 Method::print_touched_methods(tty); 393 } 394 } 395 396 #endif 397 398 // Note: before_exit() can be executed only once, if more than one threads 399 // are trying to shutdown the VM at the same time, only one thread 400 // can run before_exit() and all other threads must wait. 401 void before_exit(JavaThread * thread) { 402 #define BEFORE_EXIT_NOT_RUN 0 403 #define BEFORE_EXIT_RUNNING 1 404 #define BEFORE_EXIT_DONE 2 405 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 406 407 // Note: don't use a Mutex to guard the entire before_exit(), as 408 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 409 // A CAS or OSMutex would work just fine but then we need to manipulate 410 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 411 // for synchronization. 412 { MutexLocker ml(BeforeExit_lock); 413 switch (_before_exit_status) { 414 case BEFORE_EXIT_NOT_RUN: 415 _before_exit_status = BEFORE_EXIT_RUNNING; 416 break; 417 case BEFORE_EXIT_RUNNING: 418 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 419 BeforeExit_lock->wait(); 420 } 421 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 422 return; 423 case BEFORE_EXIT_DONE: 424 return; 425 } 426 } 427 428 #if INCLUDE_JVMCI 429 JVMCIRuntime::shutdown(); 430 #endif 431 432 // Hang forever on exit if we're reporting an error. 433 if (ShowMessageBoxOnError && is_error_reported()) { 434 os::infinite_sleep(); 435 } 436 437 // Stop the WatcherThread. We do this before disenrolling various 438 // PeriodicTasks to reduce the likelihood of races. 439 if (PeriodicTask::num_tasks() > 0) { 440 WatcherThread::stop(); 441 } 442 443 // Print statistics gathered (profiling ...) 444 if (Arguments::has_profile()) { 445 FlatProfiler::disengage(); 446 FlatProfiler::print(10); 447 } 448 449 // shut down the StatSampler task 450 StatSampler::disengage(); 451 StatSampler::destroy(); 452 453 // Stop concurrent GC threads 454 Universe::heap()->stop(); 455 456 // Print GC/heap related information. 457 if (PrintGCDetails) { 458 Universe::print(); 459 AdaptiveSizePolicyOutput(0); 460 if (Verbose) { 461 ClassLoaderDataGraph::dump_on(gclog_or_tty); 462 } 463 } 464 465 if (PrintBytecodeHistogram) { 466 BytecodeHistogram::print(); 467 } 468 469 if (JvmtiExport::should_post_thread_life()) { 470 JvmtiExport::post_thread_end(thread); 471 } 472 473 474 EventThreadEnd event; 475 if (event.should_commit()) { 476 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 477 event.commit(); 478 } 479 480 // Always call even when there are not JVMTI environments yet, since environments 481 // may be attached late and JVMTI must track phases of VM execution 482 JvmtiExport::post_vm_death(); 483 Threads::shutdown_vm_agents(); 484 485 // Terminate the signal thread 486 // Note: we don't wait until it actually dies. 487 os::terminate_signal_thread(); 488 489 print_statistics(); 490 Universe::heap()->print_tracing_info(); 491 492 { MutexLocker ml(BeforeExit_lock); 493 _before_exit_status = BEFORE_EXIT_DONE; 494 BeforeExit_lock->notify_all(); 495 } 496 497 if (VerifyStringTableAtExit) { 498 int fail_cnt = 0; 499 { 500 MutexLocker ml(StringTable_lock); 501 fail_cnt = StringTable::verify_and_compare_entries(); 502 } 503 504 if (fail_cnt != 0) { 505 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 506 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 507 } 508 } 509 510 #undef BEFORE_EXIT_NOT_RUN 511 #undef BEFORE_EXIT_RUNNING 512 #undef BEFORE_EXIT_DONE 513 } 514 515 void vm_exit(int code) { 516 Thread* thread = ThreadLocalStorage::is_initialized() ? 517 ThreadLocalStorage::get_thread_slow() : NULL; 518 if (thread == NULL) { 519 // we have serious problems -- just exit 520 vm_direct_exit(code); 521 } 522 523 if (VMThread::vm_thread() != NULL) { 524 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 525 VM_Exit op(code); 526 if (thread->is_Java_thread()) 527 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 528 VMThread::execute(&op); 529 // should never reach here; but in case something wrong with VM Thread. 530 vm_direct_exit(code); 531 } else { 532 // VM thread is gone, just exit 533 vm_direct_exit(code); 534 } 535 ShouldNotReachHere(); 536 } 537 538 void notify_vm_shutdown() { 539 // For now, just a dtrace probe. 540 HOTSPOT_VM_SHUTDOWN(); 541 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 542 } 543 544 void vm_direct_exit(int code) { 545 notify_vm_shutdown(); 546 os::wait_for_keypress_at_exit(); 547 os::exit(code); 548 } 549 550 void vm_perform_shutdown_actions() { 551 // Warning: do not call 'exit_globals()' here. All threads are still running. 552 // Calling 'exit_globals()' will disable thread-local-storage and cause all 553 // kinds of assertions to trigger in debug mode. 554 if (is_init_completed()) { 555 Thread* thread = ThreadLocalStorage::is_initialized() ? 556 ThreadLocalStorage::get_thread_slow() : NULL; 557 if (thread != NULL && thread->is_Java_thread()) { 558 // We are leaving the VM, set state to native (in case any OS exit 559 // handlers call back to the VM) 560 JavaThread* jt = (JavaThread*)thread; 561 // Must always be walkable or have no last_Java_frame when in 562 // thread_in_native 563 jt->frame_anchor()->make_walkable(jt); 564 jt->set_thread_state(_thread_in_native); 565 } 566 } 567 notify_vm_shutdown(); 568 } 569 570 void vm_shutdown() 571 { 572 vm_perform_shutdown_actions(); 573 os::wait_for_keypress_at_exit(); 574 os::shutdown(); 575 } 576 577 void vm_abort(bool dump_core) { 578 vm_perform_shutdown_actions(); 579 os::wait_for_keypress_at_exit(); 580 os::abort(dump_core); 581 ShouldNotReachHere(); 582 } 583 584 void vm_notify_during_shutdown(const char* error, const char* message) { 585 if (error != NULL) { 586 tty->print_cr("Error occurred during initialization of VM"); 587 tty->print("%s", error); 588 if (message != NULL) { 589 tty->print_cr(": %s", message); 590 } 591 else { 592 tty->cr(); 593 } 594 } 595 if (ShowMessageBoxOnError && WizardMode) { 596 fatal("Error occurred during initialization of VM"); 597 } 598 } 599 600 void vm_exit_during_initialization(Handle exception) { 601 tty->print_cr("Error occurred during initialization of VM"); 602 // If there are exceptions on this thread it must be cleared 603 // first and here. Any future calls to EXCEPTION_MARK requires 604 // that no pending exceptions exist. 605 Thread *THREAD = Thread::current(); 606 if (HAS_PENDING_EXCEPTION) { 607 CLEAR_PENDING_EXCEPTION; 608 } 609 java_lang_Throwable::print(exception, tty); 610 tty->cr(); 611 java_lang_Throwable::print_stack_trace(exception(), tty); 612 tty->cr(); 613 vm_notify_during_shutdown(NULL, NULL); 614 615 // Failure during initialization, we don't want to dump core 616 vm_abort(false); 617 } 618 619 void vm_exit_during_initialization(Symbol* ex, const char* message) { 620 ResourceMark rm; 621 vm_notify_during_shutdown(ex->as_C_string(), message); 622 623 // Failure during initialization, we don't want to dump core 624 vm_abort(false); 625 } 626 627 void vm_exit_during_initialization(const char* error, const char* message) { 628 vm_notify_during_shutdown(error, message); 629 630 // Failure during initialization, we don't want to dump core 631 vm_abort(false); 632 } 633 634 void vm_shutdown_during_initialization(const char* error, const char* message) { 635 vm_notify_during_shutdown(error, message); 636 vm_shutdown(); 637 } 638 639 JDK_Version JDK_Version::_current; 640 const char* JDK_Version::_runtime_name; 641 const char* JDK_Version::_runtime_version; 642 643 void JDK_Version::initialize() { 644 jdk_version_info info; 645 assert(!_current.is_valid(), "Don't initialize twice"); 646 647 void *lib_handle = os::native_java_library(); 648 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 649 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 650 651 if (func == NULL) { 652 // JDK older than 1.6 653 _current._partially_initialized = true; 654 } else { 655 (*func)(&info, sizeof(info)); 656 657 int major = JDK_VERSION_MAJOR(info.jdk_version); 658 int minor = JDK_VERSION_MINOR(info.jdk_version); 659 int micro = JDK_VERSION_MICRO(info.jdk_version); 660 int build = JDK_VERSION_BUILD(info.jdk_version); 661 if (major == 1 && minor > 4) { 662 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 663 major = minor; 664 minor = micro; 665 micro = 0; 666 } 667 // Incompatible with pre-4243978 JDK. 668 if (info.pending_list_uses_discovered_field == 0) { 669 vm_exit_during_initialization( 670 "Incompatible JDK is not using Reference.discovered field for pending list"); 671 } 672 _current = JDK_Version(major, minor, micro, info.update_version, 673 info.special_update_version, build, 674 info.thread_park_blocker == 1, 675 info.post_vm_init_hook_enabled == 1); 676 } 677 } 678 679 void JDK_Version::fully_initialize( 680 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 681 // This is only called when current is less than 1.6 and we've gotten 682 // far enough in the initialization to determine the exact version. 683 assert(major < 6, "not needed for JDK version >= 6"); 684 assert(is_partially_initialized(), "must not initialize"); 685 if (major < 5) { 686 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 687 micro = minor; 688 minor = major; 689 major = 1; 690 } 691 _current = JDK_Version(major, minor, micro, update); 692 } 693 694 void JDK_Version_init() { 695 JDK_Version::initialize(); 696 } 697 698 static int64_t encode_jdk_version(const JDK_Version& v) { 699 return 700 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 701 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 702 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 703 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 704 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 705 ((int64_t)v.build_number() << (BitsPerByte * 0)); 706 } 707 708 int JDK_Version::compare(const JDK_Version& other) const { 709 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 710 if (!is_partially_initialized() && other.is_partially_initialized()) { 711 return -(other.compare(*this)); // flip the comparators 712 } 713 assert(!other.is_partially_initialized(), "Not initialized yet"); 714 if (is_partially_initialized()) { 715 assert(other.major_version() >= 6, 716 "Invalid JDK version comparison during initialization"); 717 return -1; 718 } else { 719 uint64_t e = encode_jdk_version(*this); 720 uint64_t o = encode_jdk_version(other); 721 return (e > o) ? 1 : ((e == o) ? 0 : -1); 722 } 723 } 724 725 void JDK_Version::to_string(char* buffer, size_t buflen) const { 726 assert(buffer && buflen > 0, "call with useful buffer"); 727 size_t index = 0; 728 729 if (!is_valid()) { 730 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 731 } else if (is_partially_initialized()) { 732 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 733 } else { 734 int rc = jio_snprintf( 735 &buffer[index], buflen - index, "%d.%d", _major, _minor); 736 if (rc == -1) return; 737 index += rc; 738 if (_micro > 0) { 739 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 740 } 741 if (_update > 0) { 742 rc = jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 743 if (rc == -1) return; 744 index += rc; 745 } 746 if (_special > 0) { 747 rc = jio_snprintf(&buffer[index], buflen - index, "%c", _special); 748 if (rc == -1) return; 749 index += rc; 750 } 751 if (_build > 0) { 752 rc = jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 753 if (rc == -1) return; 754 index += rc; 755 } 756 } 757 }