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/stringTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "code/codeCache.hpp" 30 #include "compiler/compileBroker.hpp" 31 #include "compiler/compilerOracle.hpp" 32 #include "interpreter/bytecodeHistogram.hpp" 33 #include "memory/genCollectedHeap.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/universe.hpp" 36 #include "oops/constantPool.hpp" 37 #include "oops/generateOopMap.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceOop.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "prims/jvmtiExport.hpp" 45 #include "runtime/arguments.hpp" 46 #include "runtime/biasedLocking.hpp" 47 #include "runtime/compilationPolicy.hpp" 48 #include "runtime/fprofiler.hpp" 49 #include "runtime/init.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/memprofiler.hpp" 53 #include "runtime/sharedRuntime.hpp" 54 #include "runtime/statSampler.hpp" 55 #include "runtime/sweeper.hpp" 56 #include "runtime/task.hpp" 57 #include "runtime/thread.inline.hpp" 58 #include "runtime/timer.hpp" 59 #include "runtime/vm_operations.hpp" 60 #include "services/memTracker.hpp" 61 #include "trace/tracing.hpp" 62 #include "utilities/dtrace.hpp" 63 #include "utilities/globalDefinitions.hpp" 64 #include "utilities/histogram.hpp" 65 #include "utilities/macros.hpp" 66 #include "utilities/vmError.hpp" 67 #if INCLUDE_ALL_GCS 68 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" 69 #include "gc_implementation/parallelScavenge/psScavenge.hpp" 70 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 71 #endif // INCLUDE_ALL_GCS 72 #ifdef COMPILER1 73 #include "c1/c1_Compiler.hpp" 74 #include "c1/c1_Runtime1.hpp" 75 #endif 76 #ifdef COMPILER2 77 #include "code/compiledIC.hpp" 78 #include "compiler/methodLiveness.hpp" 79 #include "opto/compile.hpp" 80 #include "opto/indexSet.hpp" 81 #include "opto/runtime.hpp" 82 #endif 83 84 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 85 86 GrowableArray<Method*>* collected_profiled_methods; 87 88 int compare_methods(Method** a, Method** b) { 89 // %%% there can be 32-bit overflow here 90 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 91 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 92 } 93 94 void collect_profiled_methods(Method* m) { 95 Thread* thread = Thread::current(); 96 // This HandleMark prevents a huge amount of handles from being added 97 // to the metadata_handles() array on the thread. 98 HandleMark hm(thread); 99 methodHandle mh(thread, m); 100 if ((m->method_data() != NULL) && 101 (PrintMethodData || CompilerOracle::should_print(mh))) { 102 collected_profiled_methods->push(m); 103 } 104 } 105 106 void print_method_profiling_data() { 107 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) && 108 (PrintMethodData || CompilerOracle::should_print_methods())) { 109 ResourceMark rm; 110 HandleMark hm; 111 collected_profiled_methods = new GrowableArray<Method*>(1024); 112 ClassLoaderDataGraph::methods_do(collect_profiled_methods); 113 collected_profiled_methods->sort(&compare_methods); 114 115 int count = collected_profiled_methods->length(); 116 int total_size = 0; 117 if (count > 0) { 118 for (int index = 0; index < count; index++) { 119 Method* m = collected_profiled_methods->at(index); 120 ttyLocker ttyl; 121 tty->print_cr("------------------------------------------------------------------------"); 122 m->print_invocation_count(); 123 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 124 tty->cr(); 125 // Dump data on parameters if any 126 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 127 tty->fill_to(2); 128 m->method_data()->parameters_type_data()->print_data_on(tty); 129 } 130 m->print_codes(); 131 total_size += m->method_data()->size_in_bytes(); 132 } 133 tty->print_cr("------------------------------------------------------------------------"); 134 tty->print_cr("Total MDO size: %d bytes", total_size); 135 } 136 } 137 } 138 139 140 #ifndef PRODUCT 141 142 // Statistics printing (method invocation histogram) 143 144 GrowableArray<Method*>* collected_invoked_methods; 145 146 void collect_invoked_methods(Method* m) { 147 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 148 collected_invoked_methods->push(m); 149 } 150 } 151 152 153 154 155 void print_method_invocation_histogram() { 156 ResourceMark rm; 157 HandleMark hm; 158 collected_invoked_methods = new GrowableArray<Method*>(1024); 159 SystemDictionary::methods_do(collect_invoked_methods); 160 collected_invoked_methods->sort(&compare_methods); 161 // 162 tty->cr(); 163 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 164 tty->cr(); 165 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 166 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 167 synch_total = 0, nativ_total = 0, acces_total = 0; 168 for (int index = 0; index < collected_invoked_methods->length(); index++) { 169 Method* m = collected_invoked_methods->at(index); 170 int c = m->invocation_count() + m->compiled_invocation_count(); 171 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 172 int_total += m->invocation_count(); 173 comp_total += m->compiled_invocation_count(); 174 if (m->is_final()) final_total += c; 175 if (m->is_static()) static_total += c; 176 if (m->is_synchronized()) synch_total += c; 177 if (m->is_native()) nativ_total += c; 178 if (m->is_accessor()) acces_total += c; 179 } 180 tty->cr(); 181 total = int_total + comp_total; 182 tty->print_cr("Invocations summary:"); 183 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 184 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 185 tty->print_cr("\t%9d (100%%) total", total); 186 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 187 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 188 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 189 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 190 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 191 tty->cr(); 192 SharedRuntime::print_call_statistics(comp_total); 193 } 194 195 void print_bytecode_count() { 196 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 197 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 198 } 199 } 200 201 AllocStats alloc_stats; 202 203 204 205 // General statistics printing (profiling ...) 206 void print_statistics() { 207 #ifdef ASSERT 208 209 if (CountRuntimeCalls) { 210 extern Histogram *RuntimeHistogram; 211 RuntimeHistogram->print(); 212 } 213 214 if (CountJNICalls) { 215 extern Histogram *JNIHistogram; 216 JNIHistogram->print(); 217 } 218 219 if (CountJVMCalls) { 220 extern Histogram *JVMHistogram; 221 JVMHistogram->print(); 222 } 223 224 #endif 225 226 if (MemProfiling) { 227 MemProfiler::disengage(); 228 } 229 230 if (CITime) { 231 CompileBroker::print_times(); 232 } 233 234 #ifdef COMPILER1 235 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 236 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 237 Runtime1::print_statistics(); 238 Deoptimization::print_statistics(); 239 SharedRuntime::print_statistics(); 240 nmethod::print_statistics(); 241 } 242 #endif /* COMPILER1 */ 243 244 #ifdef COMPILER2 245 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 246 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 247 Compile::print_statistics(); 248 #ifndef COMPILER1 249 Deoptimization::print_statistics(); 250 nmethod::print_statistics(); 251 SharedRuntime::print_statistics(); 252 #endif //COMPILER1 253 os::print_statistics(); 254 } 255 256 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 257 OptoRuntime::print_named_counters(); 258 } 259 260 if (TimeLivenessAnalysis) { 261 MethodLiveness::print_times(); 262 } 263 #ifdef ASSERT 264 if (CollectIndexSetStatistics) { 265 IndexSet::print_statistics(); 266 } 267 #endif // ASSERT 268 #endif // COMPILER2 269 if (CountCompiledCalls) { 270 print_method_invocation_histogram(); 271 } 272 273 print_method_profiling_data(); 274 275 if (TimeCompiler) { 276 COMPILER2_PRESENT(Compile::print_timers();) 277 } 278 if (TimeCompilationPolicy) { 279 CompilationPolicy::policy()->print_time(); 280 } 281 if (TimeOopMap) { 282 GenerateOopMap::print_time(); 283 } 284 if (ProfilerCheckIntervals) { 285 PeriodicTask::print_intervals(); 286 } 287 if (PrintSymbolTableSizeHistogram) { 288 SymbolTable::print_histogram(); 289 } 290 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 291 BytecodeCounter::print(); 292 } 293 if (PrintBytecodePairHistogram) { 294 BytecodePairHistogram::print(); 295 } 296 297 if (PrintCodeCache) { 298 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 299 CodeCache::print(); 300 } 301 302 if (PrintMethodFlushingStatistics) { 303 NMethodSweeper::print(); 304 } 305 306 if (PrintCodeCache2) { 307 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 308 CodeCache::print_internals(); 309 } 310 311 if (PrintClassStatistics) { 312 SystemDictionary::print_class_statistics(); 313 } 314 if (PrintMethodStatistics) { 315 SystemDictionary::print_method_statistics(); 316 } 317 318 if (PrintVtableStats) { 319 klassVtable::print_statistics(); 320 klassItable::print_statistics(); 321 } 322 if (VerifyOops) { 323 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 324 } 325 326 print_bytecode_count(); 327 if (PrintMallocStatistics) { 328 tty->print("allocation stats: "); 329 alloc_stats.print(); 330 tty->cr(); 331 } 332 333 if (PrintSystemDictionaryAtExit) { 334 SystemDictionary::print(); 335 } 336 337 if (PrintBiasedLockingStatistics) { 338 BiasedLocking::print_counters(); 339 } 340 341 #ifdef ENABLE_ZAP_DEAD_LOCALS 342 #ifdef COMPILER2 343 if (ZapDeadCompiledLocals) { 344 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); 345 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); 346 } 347 #endif // COMPILER2 348 #endif // ENABLE_ZAP_DEAD_LOCALS 349 // Native memory tracking data 350 if (PrintNMTStatistics) { 351 MemTracker::final_report(tty); 352 } 353 } 354 355 #else // PRODUCT MODE STATISTICS 356 357 void print_statistics() { 358 359 if (PrintMethodData) { 360 print_method_profiling_data(); 361 } 362 363 if (CITime) { 364 CompileBroker::print_times(); 365 } 366 367 if (PrintCodeCache) { 368 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 369 CodeCache::print(); 370 } 371 372 if (PrintMethodFlushingStatistics) { 373 NMethodSweeper::print(); 374 } 375 376 #ifdef COMPILER2 377 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 378 OptoRuntime::print_named_counters(); 379 } 380 #endif 381 if (PrintBiasedLockingStatistics) { 382 BiasedLocking::print_counters(); 383 } 384 385 // Native memory tracking data 386 if (PrintNMTStatistics) { 387 MemTracker::final_report(tty); 388 } 389 } 390 391 #endif 392 393 394 // Helper class for registering on_exit calls through JVM_OnExit 395 396 extern "C" { 397 typedef void (*__exit_proc)(void); 398 } 399 400 class ExitProc : public CHeapObj<mtInternal> { 401 private: 402 __exit_proc _proc; 403 // void (*_proc)(void); 404 ExitProc* _next; 405 public: 406 // ExitProc(void (*proc)(void)) { 407 ExitProc(__exit_proc proc) { 408 _proc = proc; 409 _next = NULL; 410 } 411 void evaluate() { _proc(); } 412 ExitProc* next() const { return _next; } 413 void set_next(ExitProc* next) { _next = next; } 414 }; 415 416 417 // Linked list of registered on_exit procedures 418 419 static ExitProc* exit_procs = NULL; 420 421 422 extern "C" { 423 void register_on_exit_function(void (*func)(void)) { 424 ExitProc *entry = new ExitProc(func); 425 // Classic vm does not throw an exception in case the allocation failed, 426 if (entry != NULL) { 427 entry->set_next(exit_procs); 428 exit_procs = entry; 429 } 430 } 431 } 432 433 // Note: before_exit() can be executed only once, if more than one threads 434 // are trying to shutdown the VM at the same time, only one thread 435 // can run before_exit() and all other threads must wait. 436 void before_exit(JavaThread * thread) { 437 #define BEFORE_EXIT_NOT_RUN 0 438 #define BEFORE_EXIT_RUNNING 1 439 #define BEFORE_EXIT_DONE 2 440 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 441 442 // Note: don't use a Mutex to guard the entire before_exit(), as 443 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 444 // A CAS or OSMutex would work just fine but then we need to manipulate 445 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 446 // for synchronization. 447 { MutexLocker ml(BeforeExit_lock); 448 switch (_before_exit_status) { 449 case BEFORE_EXIT_NOT_RUN: 450 _before_exit_status = BEFORE_EXIT_RUNNING; 451 break; 452 case BEFORE_EXIT_RUNNING: 453 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 454 BeforeExit_lock->wait(); 455 } 456 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 457 return; 458 case BEFORE_EXIT_DONE: 459 return; 460 } 461 } 462 463 // The only difference between this and Win32's _onexit procs is that 464 // this version is invoked before any threads get killed. 465 ExitProc* current = exit_procs; 466 while (current != NULL) { 467 ExitProc* next = current->next(); 468 current->evaluate(); 469 delete current; 470 current = next; 471 } 472 473 // Hang forever on exit if we're reporting an error. 474 if (ShowMessageBoxOnError && is_error_reported()) { 475 os::infinite_sleep(); 476 } 477 478 // Terminate watcher thread - must before disenrolling any periodic task 479 if (PeriodicTask::num_tasks() > 0) 480 WatcherThread::stop(); 481 482 // Print statistics gathered (profiling ...) 483 if (Arguments::has_profile()) { 484 FlatProfiler::disengage(); 485 FlatProfiler::print(10); 486 } 487 488 // shut down the StatSampler task 489 StatSampler::disengage(); 490 StatSampler::destroy(); 491 492 // Stop concurrent GC threads 493 Universe::heap()->stop(); 494 495 // Print GC/heap related information. 496 if (PrintGCDetails) { 497 Universe::print(); 498 AdaptiveSizePolicyOutput(0); 499 if (Verbose) { 500 ClassLoaderDataGraph::dump_on(gclog_or_tty); 501 } 502 } 503 504 if (PrintBytecodeHistogram) { 505 BytecodeHistogram::print(); 506 } 507 508 if (JvmtiExport::should_post_thread_life()) { 509 JvmtiExport::post_thread_end(thread); 510 } 511 512 513 EventThreadEnd event; 514 if (event.should_commit()) { 515 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 516 event.commit(); 517 } 518 519 // Always call even when there are not JVMTI environments yet, since environments 520 // may be attached late and JVMTI must track phases of VM execution 521 JvmtiExport::post_vm_death(); 522 Threads::shutdown_vm_agents(); 523 524 // Terminate the signal thread 525 // Note: we don't wait until it actually dies. 526 os::terminate_signal_thread(); 527 528 print_statistics(); 529 Universe::heap()->print_tracing_info(); 530 531 { MutexLocker ml(BeforeExit_lock); 532 _before_exit_status = BEFORE_EXIT_DONE; 533 BeforeExit_lock->notify_all(); 534 } 535 536 if (VerifyStringTableAtExit) { 537 int fail_cnt = 0; 538 { 539 MutexLocker ml(StringTable_lock); 540 fail_cnt = StringTable::verify_and_compare_entries(); 541 } 542 543 if (fail_cnt != 0) { 544 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 545 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 546 } 547 } 548 549 #undef BEFORE_EXIT_NOT_RUN 550 #undef BEFORE_EXIT_RUNNING 551 #undef BEFORE_EXIT_DONE 552 } 553 554 void vm_exit(int code) { 555 Thread* thread = ThreadLocalStorage::is_initialized() ? 556 ThreadLocalStorage::get_thread_slow() : NULL; 557 if (thread == NULL) { 558 // we have serious problems -- just exit 559 vm_direct_exit(code); 560 } 561 562 if (VMThread::vm_thread() != NULL) { 563 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 564 VM_Exit op(code); 565 if (thread->is_Java_thread()) 566 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 567 VMThread::execute(&op); 568 // should never reach here; but in case something wrong with VM Thread. 569 vm_direct_exit(code); 570 } else { 571 // VM thread is gone, just exit 572 vm_direct_exit(code); 573 } 574 ShouldNotReachHere(); 575 } 576 577 void notify_vm_shutdown() { 578 // For now, just a dtrace probe. 579 HOTSPOT_VM_SHUTDOWN(); 580 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 581 } 582 583 void vm_direct_exit(int code) { 584 notify_vm_shutdown(); 585 os::wait_for_keypress_at_exit(); 586 os::exit(code); 587 } 588 589 void vm_perform_shutdown_actions() { 590 // Warning: do not call 'exit_globals()' here. All threads are still running. 591 // Calling 'exit_globals()' will disable thread-local-storage and cause all 592 // kinds of assertions to trigger in debug mode. 593 if (is_init_completed()) { 594 Thread* thread = ThreadLocalStorage::is_initialized() ? 595 ThreadLocalStorage::get_thread_slow() : NULL; 596 if (thread != NULL && thread->is_Java_thread()) { 597 // We are leaving the VM, set state to native (in case any OS exit 598 // handlers call back to the VM) 599 JavaThread* jt = (JavaThread*)thread; 600 // Must always be walkable or have no last_Java_frame when in 601 // thread_in_native 602 jt->frame_anchor()->make_walkable(jt); 603 jt->set_thread_state(_thread_in_native); 604 } 605 } 606 notify_vm_shutdown(); 607 } 608 609 void vm_shutdown() 610 { 611 vm_perform_shutdown_actions(); 612 os::wait_for_keypress_at_exit(); 613 os::shutdown(); 614 } 615 616 void vm_abort(bool dump_core) { 617 vm_perform_shutdown_actions(); 618 os::wait_for_keypress_at_exit(); 619 os::abort(dump_core); 620 ShouldNotReachHere(); 621 } 622 623 void vm_notify_during_shutdown(const char* error, const char* message) { 624 if (error != NULL) { 625 tty->print_cr("Error occurred during initialization of VM"); 626 tty->print("%s", error); 627 if (message != NULL) { 628 tty->print_cr(": %s", message); 629 } 630 else { 631 tty->cr(); 632 } 633 } 634 if (ShowMessageBoxOnError && WizardMode) { 635 fatal("Error occurred during initialization of VM"); 636 } 637 } 638 639 void vm_exit_during_initialization(Handle exception) { 640 tty->print_cr("Error occurred during initialization of VM"); 641 // If there are exceptions on this thread it must be cleared 642 // first and here. Any future calls to EXCEPTION_MARK requires 643 // that no pending exceptions exist. 644 Thread *THREAD = Thread::current(); 645 if (HAS_PENDING_EXCEPTION) { 646 CLEAR_PENDING_EXCEPTION; 647 } 648 java_lang_Throwable::print(exception, tty); 649 tty->cr(); 650 java_lang_Throwable::print_stack_trace(exception(), tty); 651 tty->cr(); 652 vm_notify_during_shutdown(NULL, NULL); 653 654 // Failure during initialization, we don't want to dump core 655 vm_abort(false); 656 } 657 658 void vm_exit_during_initialization(Symbol* ex, const char* message) { 659 ResourceMark rm; 660 vm_notify_during_shutdown(ex->as_C_string(), message); 661 662 // Failure during initialization, we don't want to dump core 663 vm_abort(false); 664 } 665 666 void vm_exit_during_initialization(const char* error, const char* message) { 667 vm_notify_during_shutdown(error, message); 668 669 // Failure during initialization, we don't want to dump core 670 vm_abort(false); 671 } 672 673 void vm_shutdown_during_initialization(const char* error, const char* message) { 674 vm_notify_during_shutdown(error, message); 675 vm_shutdown(); 676 } 677 678 JDK_Version JDK_Version::_current; 679 const char* JDK_Version::_runtime_name; 680 const char* JDK_Version::_runtime_version; 681 682 void JDK_Version::initialize() { 683 jdk_version_info info; 684 assert(!_current.is_valid(), "Don't initialize twice"); 685 686 void *lib_handle = os::native_java_library(); 687 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 688 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 689 690 if (func == NULL) { 691 // JDK older than 1.6 692 _current._partially_initialized = true; 693 } else { 694 (*func)(&info, sizeof(info)); 695 696 int major = JDK_VERSION_MAJOR(info.jdk_version); 697 int minor = JDK_VERSION_MINOR(info.jdk_version); 698 int micro = JDK_VERSION_MICRO(info.jdk_version); 699 int build = JDK_VERSION_BUILD(info.jdk_version); 700 if (major == 1 && minor > 4) { 701 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 702 major = minor; 703 minor = micro; 704 micro = 0; 705 } 706 _current = JDK_Version(major, minor, micro, info.update_version, 707 info.special_update_version, build, 708 info.thread_park_blocker == 1, 709 info.post_vm_init_hook_enabled == 1, 710 info.pending_list_uses_discovered_field == 1); 711 } 712 } 713 714 void JDK_Version::fully_initialize( 715 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 716 // This is only called when current is less than 1.6 and we've gotten 717 // far enough in the initialization to determine the exact version. 718 assert(major < 6, "not needed for JDK version >= 6"); 719 assert(is_partially_initialized(), "must not initialize"); 720 if (major < 5) { 721 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 722 micro = minor; 723 minor = major; 724 major = 1; 725 } 726 _current = JDK_Version(major, minor, micro, update); 727 } 728 729 void JDK_Version_init() { 730 JDK_Version::initialize(); 731 } 732 733 static int64_t encode_jdk_version(const JDK_Version& v) { 734 return 735 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 736 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 737 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 738 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 739 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 740 ((int64_t)v.build_number() << (BitsPerByte * 0)); 741 } 742 743 int JDK_Version::compare(const JDK_Version& other) const { 744 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 745 if (!is_partially_initialized() && other.is_partially_initialized()) { 746 return -(other.compare(*this)); // flip the comparators 747 } 748 assert(!other.is_partially_initialized(), "Not initialized yet"); 749 if (is_partially_initialized()) { 750 assert(other.major_version() >= 6, 751 "Invalid JDK version comparison during initialization"); 752 return -1; 753 } else { 754 uint64_t e = encode_jdk_version(*this); 755 uint64_t o = encode_jdk_version(other); 756 return (e > o) ? 1 : ((e == o) ? 0 : -1); 757 } 758 } 759 760 void JDK_Version::to_string(char* buffer, size_t buflen) const { 761 size_t index = 0; 762 if (!is_valid()) { 763 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 764 } else if (is_partially_initialized()) { 765 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 766 } else { 767 index += jio_snprintf( 768 &buffer[index], buflen - index, "%d.%d", _major, _minor); 769 if (_micro > 0) { 770 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 771 } 772 if (_update > 0) { 773 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 774 } 775 if (_special > 0) { 776 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); 777 } 778 if (_build > 0) { 779 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 780 } 781 } 782 }