1 /* 2 * Copyright (c) 1997, 2011, 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/symbolTable.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/constantPoolOop.hpp" 37 #include "oops/generateOopMap.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceKlassKlass.hpp" 40 #include "oops/instanceOop.hpp" 41 #include "oops/methodOop.hpp" 42 #include "oops/objArrayOop.hpp" 43 #include "oops/oop.inline.hpp" 44 #include "oops/symbol.hpp" 45 #include "prims/jvmtiExport.hpp" 46 #include "runtime/aprofiler.hpp" 47 #include "runtime/arguments.hpp" 48 #include "runtime/biasedLocking.hpp" 49 #include "runtime/compilationPolicy.hpp" 50 #include "runtime/fprofiler.hpp" 51 #include "runtime/init.hpp" 52 #include "runtime/interfaceSupport.hpp" 53 #include "runtime/java.hpp" 54 #include "runtime/memprofiler.hpp" 55 #include "runtime/sharedRuntime.hpp" 56 #include "runtime/statSampler.hpp" 57 #include "runtime/task.hpp" 58 #include "runtime/timer.hpp" 59 #include "runtime/vm_operations.hpp" 60 #include "utilities/dtrace.hpp" 61 #include "utilities/globalDefinitions.hpp" 62 #include "utilities/histogram.hpp" 63 #include "utilities/vmError.hpp" 64 #ifdef TARGET_ARCH_x86 65 # include "vm_version_x86.hpp" 66 #endif 67 #ifdef TARGET_ARCH_sparc 68 # include "vm_version_sparc.hpp" 69 #endif 70 #ifdef TARGET_ARCH_zero 71 # include "vm_version_zero.hpp" 72 #endif 73 #ifdef TARGET_ARCH_arm 74 # include "vm_version_arm.hpp" 75 #endif 76 #ifdef TARGET_ARCH_ppc 77 # include "vm_version_ppc.hpp" 78 #endif 79 #ifdef TARGET_OS_FAMILY_linux 80 # include "thread_linux.inline.hpp" 81 #endif 82 #ifdef TARGET_OS_FAMILY_solaris 83 # include "thread_solaris.inline.hpp" 84 #endif 85 #ifdef TARGET_OS_FAMILY_windows 86 # include "thread_windows.inline.hpp" 87 #endif 88 #ifndef SERIALGC 89 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" 90 #include "gc_implementation/parallelScavenge/psScavenge.hpp" 91 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 92 #endif 93 #ifdef COMPILER1 94 #include "c1/c1_Compiler.hpp" 95 #include "c1/c1_Runtime1.hpp" 96 #endif 97 #ifdef COMPILER2 98 #include "code/compiledIC.hpp" 99 #include "compiler/methodLiveness.hpp" 100 #include "opto/compile.hpp" 101 #include "opto/indexSet.hpp" 102 #include "opto/runtime.hpp" 103 #endif 104 105 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown); 106 107 #ifndef PRODUCT 108 109 // Statistics printing (method invocation histogram) 110 111 GrowableArray<methodOop>* collected_invoked_methods; 112 113 void collect_invoked_methods(methodOop m) { 114 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 115 collected_invoked_methods->push(m); 116 } 117 } 118 119 120 GrowableArray<methodOop>* collected_profiled_methods; 121 122 void collect_profiled_methods(methodOop m) { 123 methodHandle mh(Thread::current(), m); 124 if ((m->method_data() != NULL) && 125 (PrintMethodData || CompilerOracle::should_print(mh))) { 126 collected_profiled_methods->push(m); 127 } 128 } 129 130 131 int compare_methods(methodOop* a, methodOop* b) { 132 // %%% there can be 32-bit overflow here 133 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 134 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 135 } 136 137 138 void print_method_invocation_histogram() { 139 ResourceMark rm; 140 HandleMark hm; 141 collected_invoked_methods = new GrowableArray<methodOop>(1024); 142 SystemDictionary::methods_do(collect_invoked_methods); 143 collected_invoked_methods->sort(&compare_methods); 144 // 145 tty->cr(); 146 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 147 tty->cr(); 148 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 149 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 150 synch_total = 0, nativ_total = 0, acces_total = 0; 151 for (int index = 0; index < collected_invoked_methods->length(); index++) { 152 methodOop m = collected_invoked_methods->at(index); 153 int c = m->invocation_count() + m->compiled_invocation_count(); 154 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 155 int_total += m->invocation_count(); 156 comp_total += m->compiled_invocation_count(); 157 if (m->is_final()) final_total += c; 158 if (m->is_static()) static_total += c; 159 if (m->is_synchronized()) synch_total += c; 160 if (m->is_native()) nativ_total += c; 161 if (m->is_accessor()) acces_total += c; 162 } 163 tty->cr(); 164 total = int_total + comp_total; 165 tty->print_cr("Invocations summary:"); 166 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 167 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 168 tty->print_cr("\t%9d (100%%) total", total); 169 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 170 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 171 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 172 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 173 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 174 tty->cr(); 175 SharedRuntime::print_call_statistics(comp_total); 176 } 177 178 void print_method_profiling_data() { 179 ResourceMark rm; 180 HandleMark hm; 181 collected_profiled_methods = new GrowableArray<methodOop>(1024); 182 SystemDictionary::methods_do(collect_profiled_methods); 183 collected_profiled_methods->sort(&compare_methods); 184 185 int count = collected_profiled_methods->length(); 186 if (count > 0) { 187 for (int index = 0; index < count; index++) { 188 methodOop m = collected_profiled_methods->at(index); 189 ttyLocker ttyl; 190 tty->print_cr("------------------------------------------------------------------------"); 191 //m->print_name(tty); 192 m->print_invocation_count(); 193 tty->cr(); 194 m->print_codes(); 195 } 196 tty->print_cr("------------------------------------------------------------------------"); 197 } 198 } 199 200 void print_bytecode_count() { 201 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 202 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 203 } 204 } 205 206 AllocStats alloc_stats; 207 208 209 210 // General statistics printing (profiling ...) 211 212 void print_statistics() { 213 214 #ifdef ASSERT 215 216 if (CountRuntimeCalls) { 217 extern Histogram *RuntimeHistogram; 218 RuntimeHistogram->print(); 219 } 220 221 if (CountJNICalls) { 222 extern Histogram *JNIHistogram; 223 JNIHistogram->print(); 224 } 225 226 if (CountJVMCalls) { 227 extern Histogram *JVMHistogram; 228 JVMHistogram->print(); 229 } 230 231 #endif 232 233 if (MemProfiling) { 234 MemProfiler::disengage(); 235 } 236 237 if (CITime) { 238 CompileBroker::print_times(); 239 } 240 241 #ifdef COMPILER1 242 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 243 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 244 Runtime1::print_statistics(); 245 Deoptimization::print_statistics(); 246 nmethod::print_statistics(); 247 } 248 #endif /* COMPILER1 */ 249 250 #ifdef COMPILER2 251 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 252 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 253 Compile::print_statistics(); 254 #ifndef COMPILER1 255 Deoptimization::print_statistics(); 256 nmethod::print_statistics(); 257 #endif //COMPILER1 258 SharedRuntime::print_statistics(); 259 os::print_statistics(); 260 } 261 262 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) { 263 OptoRuntime::print_named_counters(); 264 } 265 266 if (TimeLivenessAnalysis) { 267 MethodLiveness::print_times(); 268 } 269 #ifdef ASSERT 270 if (CollectIndexSetStatistics) { 271 IndexSet::print_statistics(); 272 } 273 #endif // ASSERT 274 #endif // COMPILER2 275 if (CountCompiledCalls) { 276 print_method_invocation_histogram(); 277 } 278 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) { 279 print_method_profiling_data(); 280 } 281 if (TimeCompiler) { 282 COMPILER2_PRESENT(Compile::print_timers();) 283 } 284 if (TimeCompilationPolicy) { 285 CompilationPolicy::policy()->print_time(); 286 } 287 if (TimeOopMap) { 288 GenerateOopMap::print_time(); 289 } 290 if (ProfilerCheckIntervals) { 291 PeriodicTask::print_intervals(); 292 } 293 if (PrintSymbolTableSizeHistogram) { 294 SymbolTable::print_histogram(); 295 } 296 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 297 BytecodeCounter::print(); 298 } 299 if (PrintBytecodePairHistogram) { 300 BytecodePairHistogram::print(); 301 } 302 303 if (PrintCodeCache) { 304 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 305 CodeCache::print(); 306 } 307 308 if (PrintCodeCache2) { 309 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 310 CodeCache::print_internals(); 311 } 312 313 if (PrintClassStatistics) { 314 SystemDictionary::print_class_statistics(); 315 } 316 if (PrintMethodStatistics) { 317 SystemDictionary::print_method_statistics(); 318 } 319 320 if (PrintVtableStats) { 321 klassVtable::print_statistics(); 322 klassItable::print_statistics(); 323 } 324 if (VerifyOops) { 325 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 326 } 327 328 print_bytecode_count(); 329 if (WizardMode) { 330 tty->print("allocation stats: "); 331 alloc_stats.print(); 332 tty->cr(); 333 } 334 335 if (PrintSystemDictionaryAtExit) { 336 SystemDictionary::print(); 337 } 338 339 if (PrintBiasedLockingStatistics) { 340 BiasedLocking::print_counters(); 341 } 342 343 #ifdef ENABLE_ZAP_DEAD_LOCALS 344 #ifdef COMPILER2 345 if (ZapDeadCompiledLocals) { 346 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); 347 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); 348 } 349 #endif // COMPILER2 350 #endif // ENABLE_ZAP_DEAD_LOCALS 351 } 352 353 #else // PRODUCT MODE STATISTICS 354 355 void print_statistics() { 356 357 if (CITime) { 358 CompileBroker::print_times(); 359 } 360 #ifdef COMPILER2 361 if (PrintPreciseBiasedLockingStatistics) { 362 OptoRuntime::print_named_counters(); 363 } 364 #endif 365 if (PrintBiasedLockingStatistics) { 366 BiasedLocking::print_counters(); 367 } 368 } 369 370 #endif 371 372 373 // Helper class for registering on_exit calls through JVM_OnExit 374 375 extern "C" { 376 typedef void (*__exit_proc)(void); 377 } 378 379 class ExitProc : public CHeapObj { 380 private: 381 __exit_proc _proc; 382 // void (*_proc)(void); 383 ExitProc* _next; 384 public: 385 // ExitProc(void (*proc)(void)) { 386 ExitProc(__exit_proc proc) { 387 _proc = proc; 388 _next = NULL; 389 } 390 void evaluate() { _proc(); } 391 ExitProc* next() const { return _next; } 392 void set_next(ExitProc* next) { _next = next; } 393 }; 394 395 396 // Linked list of registered on_exit procedures 397 398 static ExitProc* exit_procs = NULL; 399 400 401 extern "C" { 402 void register_on_exit_function(void (*func)(void)) { 403 ExitProc *entry = new ExitProc(func); 404 // Classic vm does not throw an exception in case the allocation failed, 405 if (entry != NULL) { 406 entry->set_next(exit_procs); 407 exit_procs = entry; 408 } 409 } 410 } 411 412 // Note: before_exit() can be executed only once, if more than one threads 413 // are trying to shutdown the VM at the same time, only one thread 414 // can run before_exit() and all other threads must wait. 415 void before_exit(JavaThread * thread) { 416 #define BEFORE_EXIT_NOT_RUN 0 417 #define BEFORE_EXIT_RUNNING 1 418 #define BEFORE_EXIT_DONE 2 419 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 420 421 // Note: don't use a Mutex to guard the entire before_exit(), as 422 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 423 // A CAS or OSMutex would work just fine but then we need to manipulate 424 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 425 // for synchronization. 426 { MutexLocker ml(BeforeExit_lock); 427 switch (_before_exit_status) { 428 case BEFORE_EXIT_NOT_RUN: 429 _before_exit_status = BEFORE_EXIT_RUNNING; 430 break; 431 case BEFORE_EXIT_RUNNING: 432 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 433 BeforeExit_lock->wait(); 434 } 435 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 436 return; 437 case BEFORE_EXIT_DONE: 438 return; 439 } 440 } 441 442 // The only difference between this and Win32's _onexit procs is that 443 // this version is invoked before any threads get killed. 444 ExitProc* current = exit_procs; 445 while (current != NULL) { 446 ExitProc* next = current->next(); 447 current->evaluate(); 448 delete current; 449 current = next; 450 } 451 452 // Hang forever on exit if we're reporting an error. 453 if (ShowMessageBoxOnError && is_error_reported()) { 454 os::infinite_sleep(); 455 } 456 457 // Terminate watcher thread - must before disenrolling any periodic task 458 if (PeriodicTask::num_tasks() > 0) 459 WatcherThread::stop(); 460 461 // Print statistics gathered (profiling ...) 462 if (Arguments::has_profile()) { 463 FlatProfiler::disengage(); 464 FlatProfiler::print(10); 465 } 466 467 // shut down the StatSampler task 468 StatSampler::disengage(); 469 StatSampler::destroy(); 470 471 #ifndef SERIALGC 472 // stop CMS threads 473 if (UseConcMarkSweepGC) { 474 ConcurrentMarkSweepThread::stop(); 475 } 476 #endif // SERIALGC 477 478 // Print GC/heap related information. 479 if (PrintGCDetails) { 480 Universe::print(); 481 AdaptiveSizePolicyOutput(0); 482 } 483 484 485 if (Arguments::has_alloc_profile()) { 486 HandleMark hm; 487 // Do one last collection to enumerate all the objects 488 // allocated since the last one. 489 Universe::heap()->collect(GCCause::_allocation_profiler); 490 AllocationProfiler::disengage(); 491 AllocationProfiler::print(0); 492 } 493 494 if (PrintBytecodeHistogram) { 495 BytecodeHistogram::print(); 496 } 497 498 if (JvmtiExport::should_post_thread_life()) { 499 JvmtiExport::post_thread_end(thread); 500 } 501 // Always call even when there are not JVMTI environments yet, since environments 502 // may be attached late and JVMTI must track phases of VM execution 503 JvmtiExport::post_vm_death(); 504 Threads::shutdown_vm_agents(); 505 506 // Terminate the signal thread 507 // Note: we don't wait until it actually dies. 508 os::terminate_signal_thread(); 509 510 print_statistics(); 511 Universe::heap()->print_tracing_info(); 512 513 { MutexLocker ml(BeforeExit_lock); 514 _before_exit_status = BEFORE_EXIT_DONE; 515 BeforeExit_lock->notify_all(); 516 } 517 518 #undef BEFORE_EXIT_NOT_RUN 519 #undef BEFORE_EXIT_RUNNING 520 #undef BEFORE_EXIT_DONE 521 } 522 523 void vm_exit(int code) { 524 Thread* thread = ThreadLocalStorage::is_initialized() ? 525 ThreadLocalStorage::get_thread_slow() : NULL; 526 if (thread == NULL) { 527 // we have serious problems -- just exit 528 vm_direct_exit(code); 529 } 530 531 if (VMThread::vm_thread() != NULL) { 532 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 533 VM_Exit op(code); 534 if (thread->is_Java_thread()) 535 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 536 VMThread::execute(&op); 537 // should never reach here; but in case something wrong with VM Thread. 538 vm_direct_exit(code); 539 } else { 540 // VM thread is gone, just exit 541 vm_direct_exit(code); 542 } 543 ShouldNotReachHere(); 544 } 545 546 void wait_for_key_press(void) { 547 #ifdef TARGET_OS_FAMILY_windows 548 // if running in a debugger on windows, we want to pause before the console is closed 549 if (Arguments::created_by_gamma_launcher() && PauseAtExit && os::is_debugger_attached()) { 550 fprintf(stderr, "Press any key to continue...\n"); 551 fgetc(stdin); 552 } 553 #endif 554 } 555 556 void notify_vm_shutdown() { 557 // For now, just a dtrace probe. 558 HS_DTRACE_PROBE(hotspot, vm__shutdown); 559 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 560 wait_for_key_press(); 561 } 562 563 void vm_direct_exit(int code) { 564 notify_vm_shutdown(); 565 ::exit(code); 566 } 567 568 void vm_perform_shutdown_actions() { 569 // Warning: do not call 'exit_globals()' here. All threads are still running. 570 // Calling 'exit_globals()' will disable thread-local-storage and cause all 571 // kinds of assertions to trigger in debug mode. 572 if (is_init_completed()) { 573 Thread* thread = ThreadLocalStorage::is_initialized() ? 574 ThreadLocalStorage::get_thread_slow() : NULL; 575 if (thread != NULL && thread->is_Java_thread()) { 576 // We are leaving the VM, set state to native (in case any OS exit 577 // handlers call back to the VM) 578 JavaThread* jt = (JavaThread*)thread; 579 // Must always be walkable or have no last_Java_frame when in 580 // thread_in_native 581 jt->frame_anchor()->make_walkable(jt); 582 jt->set_thread_state(_thread_in_native); 583 } 584 } 585 notify_vm_shutdown(); 586 } 587 588 void vm_shutdown() 589 { 590 vm_perform_shutdown_actions(); 591 os::shutdown(); 592 } 593 594 void vm_abort(bool dump_core) { 595 vm_perform_shutdown_actions(); 596 os::abort(dump_core); 597 ShouldNotReachHere(); 598 } 599 600 void vm_notify_during_shutdown(const char* error, const char* message) { 601 if (error != NULL) { 602 tty->print_cr("Error occurred during initialization of VM"); 603 tty->print("%s", error); 604 if (message != NULL) { 605 tty->print_cr(": %s", message); 606 } 607 else { 608 tty->cr(); 609 } 610 } 611 if (ShowMessageBoxOnError && WizardMode) { 612 fatal("Error occurred during initialization of VM"); 613 } 614 } 615 616 void vm_exit_during_initialization(Handle exception) { 617 tty->print_cr("Error occurred during initialization of VM"); 618 // If there are exceptions on this thread it must be cleared 619 // first and here. Any future calls to EXCEPTION_MARK requires 620 // that no pending exceptions exist. 621 Thread *THREAD = Thread::current(); 622 if (HAS_PENDING_EXCEPTION) { 623 CLEAR_PENDING_EXCEPTION; 624 } 625 java_lang_Throwable::print(exception, tty); 626 tty->cr(); 627 java_lang_Throwable::print_stack_trace(exception(), tty); 628 tty->cr(); 629 vm_notify_during_shutdown(NULL, NULL); 630 631 // Failure during initialization, we don't want to dump core 632 vm_abort(false); 633 } 634 635 void vm_exit_during_initialization(Symbol* ex, const char* message) { 636 ResourceMark rm; 637 vm_notify_during_shutdown(ex->as_C_string(), message); 638 639 // Failure during initialization, we don't want to dump core 640 vm_abort(false); 641 } 642 643 void vm_exit_during_initialization(const char* error, const char* message) { 644 vm_notify_during_shutdown(error, message); 645 646 // Failure during initialization, we don't want to dump core 647 vm_abort(false); 648 } 649 650 void vm_shutdown_during_initialization(const char* error, const char* message) { 651 vm_notify_during_shutdown(error, message); 652 vm_shutdown(); 653 } 654 655 JDK_Version JDK_Version::_current; 656 657 void JDK_Version::initialize() { 658 jdk_version_info info; 659 assert(!_current.is_valid(), "Don't initialize twice"); 660 661 void *lib_handle = os::native_java_library(); 662 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 663 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 664 665 if (func == NULL) { 666 // JDK older than 1.6 667 _current._partially_initialized = true; 668 } else { 669 (*func)(&info, sizeof(info)); 670 671 int major = JDK_VERSION_MAJOR(info.jdk_version); 672 int minor = JDK_VERSION_MINOR(info.jdk_version); 673 int micro = JDK_VERSION_MICRO(info.jdk_version); 674 int build = JDK_VERSION_BUILD(info.jdk_version); 675 if (major == 1 && minor > 4) { 676 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 677 major = minor; 678 minor = micro; 679 micro = 0; 680 } 681 _current = JDK_Version(major, minor, micro, info.update_version, 682 info.special_update_version, build, 683 info.thread_park_blocker == 1, 684 info.post_vm_init_hook_enabled == 1); 685 } 686 } 687 688 void JDK_Version::fully_initialize( 689 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 690 // This is only called when current is less than 1.6 and we've gotten 691 // far enough in the initialization to determine the exact version. 692 assert(major < 6, "not needed for JDK version >= 6"); 693 assert(is_partially_initialized(), "must not initialize"); 694 if (major < 5) { 695 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 696 micro = minor; 697 minor = major; 698 major = 1; 699 } 700 _current = JDK_Version(major, minor, micro, update); 701 } 702 703 void JDK_Version_init() { 704 JDK_Version::initialize(); 705 } 706 707 static int64_t encode_jdk_version(const JDK_Version& v) { 708 return 709 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 710 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 711 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 712 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 713 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 714 ((int64_t)v.build_number() << (BitsPerByte * 0)); 715 } 716 717 int JDK_Version::compare(const JDK_Version& other) const { 718 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 719 if (!is_partially_initialized() && other.is_partially_initialized()) { 720 return -(other.compare(*this)); // flip the comparators 721 } 722 assert(!other.is_partially_initialized(), "Not initialized yet"); 723 if (is_partially_initialized()) { 724 assert(other.major_version() >= 6, 725 "Invalid JDK version comparison during initialization"); 726 return -1; 727 } else { 728 uint64_t e = encode_jdk_version(*this); 729 uint64_t o = encode_jdk_version(other); 730 return (e > o) ? 1 : ((e == o) ? 0 : -1); 731 } 732 } 733 734 void JDK_Version::to_string(char* buffer, size_t buflen) const { 735 size_t index = 0; 736 if (!is_valid()) { 737 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 738 } else if (is_partially_initialized()) { 739 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 740 } else { 741 index += jio_snprintf( 742 &buffer[index], buflen - index, "%d.%d", _major, _minor); 743 if (_micro > 0) { 744 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 745 } 746 if (_update > 0) { 747 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 748 } 749 if (_special > 0) { 750 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); 751 } 752 if (_build > 0) { 753 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 754 } 755 } 756 }