1 /* 2 * Copyright (c) 1997, 2016, 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/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/deoptimization.hpp" 49 #include "runtime/fprofiler.hpp" 50 #include "runtime/init.hpp" 51 #include "runtime/interfaceSupport.hpp" 52 #include "runtime/java.hpp" 53 #include "runtime/memprofiler.hpp" 54 #include "runtime/sharedRuntime.hpp" 55 #include "runtime/statSampler.hpp" 56 #include "runtime/sweeper.hpp" 57 #include "runtime/task.hpp" 58 #include "runtime/thread.inline.hpp" 59 #include "runtime/timer.hpp" 60 #include "runtime/vm_operations.hpp" 61 #include "services/memTracker.hpp" 62 #include "trace/tracing.hpp" 63 #include "utilities/dtrace.hpp" 64 #include "utilities/globalDefinitions.hpp" 65 #include "utilities/histogram.hpp" 66 #include "utilities/macros.hpp" 67 #include "utilities/vmError.hpp" 68 #ifdef TARGET_ARCH_x86 69 # include "vm_version_x86.hpp" 70 #endif 71 #ifdef TARGET_ARCH_sparc 72 # include "vm_version_sparc.hpp" 73 #endif 74 #ifdef TARGET_ARCH_zero 75 # include "vm_version_zero.hpp" 76 #endif 77 #ifdef TARGET_ARCH_arm 78 # include "vm_version_arm.hpp" 79 #endif 80 #ifdef TARGET_ARCH_ppc 81 # include "vm_version_ppc.hpp" 82 #endif 83 #if INCLUDE_ALL_GCS 84 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" 85 #include "gc_implementation/parallelScavenge/psScavenge.hpp" 86 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 87 #endif // INCLUDE_ALL_GCS 88 #ifdef COMPILER1 89 #include "c1/c1_Compiler.hpp" 90 #include "c1/c1_Runtime1.hpp" 91 #endif 92 #ifdef COMPILER2 93 #include "code/compiledIC.hpp" 94 #include "compiler/methodLiveness.hpp" 95 #include "opto/compile.hpp" 96 #include "opto/indexSet.hpp" 97 #include "opto/runtime.hpp" 98 #endif 99 100 #ifndef USDT2 101 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown); 102 #endif /* !USDT2 */ 103 104 #ifndef PRODUCT 105 106 // Statistics printing (method invocation histogram) 107 108 GrowableArray<Method*>* collected_invoked_methods; 109 110 void collect_invoked_methods(Method* m) { 111 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 112 collected_invoked_methods->push(m); 113 } 114 } 115 116 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 117 118 GrowableArray<Method*>* collected_profiled_methods; 119 120 void collect_profiled_methods(Method* m) { 121 Thread* thread = Thread::current(); 122 // This HandleMark prevents a huge amount of handles from being added 123 // to the metadata_handles() array on the thread. 124 HandleMark hm(thread); 125 methodHandle mh(thread, m); 126 if ((m->method_data() != NULL) && 127 (PrintMethodData || CompilerOracle::should_print(mh))) { 128 collected_profiled_methods->push(m); 129 } 130 } 131 132 133 int compare_methods(Method** a, Method** b) { 134 // %%% there can be 32-bit overflow here 135 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 136 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 137 } 138 139 140 void print_method_invocation_histogram() { 141 ResourceMark rm; 142 HandleMark hm; 143 collected_invoked_methods = new GrowableArray<Method*>(1024); 144 SystemDictionary::methods_do(collect_invoked_methods); 145 collected_invoked_methods->sort(&compare_methods); 146 // 147 tty->cr(); 148 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 149 tty->cr(); 150 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 151 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 152 synch_total = 0, nativ_total = 0, acces_total = 0; 153 for (int index = 0; index < collected_invoked_methods->length(); index++) { 154 Method* m = collected_invoked_methods->at(index); 155 int c = m->invocation_count() + m->compiled_invocation_count(); 156 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 157 int_total += m->invocation_count(); 158 comp_total += m->compiled_invocation_count(); 159 if (m->is_final()) final_total += c; 160 if (m->is_static()) static_total += c; 161 if (m->is_synchronized()) synch_total += c; 162 if (m->is_native()) nativ_total += c; 163 if (m->is_accessor()) acces_total += c; 164 } 165 tty->cr(); 166 total = int_total + comp_total; 167 tty->print_cr("Invocations summary:"); 168 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 169 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 170 tty->print_cr("\t%9d (100%%) total", total); 171 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 172 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 173 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 174 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 175 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 176 tty->cr(); 177 SharedRuntime::print_call_statistics(comp_total); 178 } 179 180 void print_method_profiling_data() { 181 ResourceMark rm; 182 HandleMark hm; 183 collected_profiled_methods = new GrowableArray<Method*>(1024); 184 SystemDictionary::methods_do(collect_profiled_methods); 185 collected_profiled_methods->sort(&compare_methods); 186 187 int count = collected_profiled_methods->length(); 188 int total_size = 0; 189 if (count > 0) { 190 for (int index = 0; index < count; index++) { 191 Method* m = collected_profiled_methods->at(index); 192 ttyLocker ttyl; 193 tty->print_cr("------------------------------------------------------------------------"); 194 //m->print_name(tty); 195 m->print_invocation_count(); 196 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 197 tty->cr(); 198 // Dump data on parameters if any 199 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 200 tty->fill_to(2); 201 m->method_data()->parameters_type_data()->print_data_on(tty); 202 } 203 m->print_codes(); 204 total_size += m->method_data()->size_in_bytes(); 205 } 206 tty->print_cr("------------------------------------------------------------------------"); 207 tty->print_cr("Total MDO size: %d bytes", total_size); 208 } 209 } 210 211 void print_bytecode_count() { 212 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 213 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 214 } 215 } 216 217 AllocStats alloc_stats; 218 219 220 221 // General statistics printing (profiling ...) 222 void print_statistics() { 223 #ifdef ASSERT 224 225 if (CountRuntimeCalls) { 226 extern Histogram *RuntimeHistogram; 227 RuntimeHistogram->print(); 228 } 229 230 if (CountJNICalls) { 231 extern Histogram *JNIHistogram; 232 JNIHistogram->print(); 233 } 234 235 if (CountJVMCalls) { 236 extern Histogram *JVMHistogram; 237 JVMHistogram->print(); 238 } 239 240 #endif 241 242 if (MemProfiling) { 243 MemProfiler::disengage(); 244 } 245 246 if (CITime) { 247 CompileBroker::print_times(); 248 } 249 250 #ifdef COMPILER1 251 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 252 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 253 Runtime1::print_statistics(); 254 Deoptimization::print_statistics(); 255 SharedRuntime::print_statistics(); 256 nmethod::print_statistics(); 257 } 258 #endif /* COMPILER1 */ 259 260 #ifdef COMPILER2 261 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 262 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 263 Compile::print_statistics(); 264 #ifndef COMPILER1 265 Deoptimization::print_statistics(); 266 nmethod::print_statistics(); 267 SharedRuntime::print_statistics(); 268 #endif //COMPILER1 269 os::print_statistics(); 270 } 271 272 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 273 OptoRuntime::print_named_counters(); 274 } 275 276 if (TimeLivenessAnalysis) { 277 MethodLiveness::print_times(); 278 } 279 #ifdef ASSERT 280 if (CollectIndexSetStatistics) { 281 IndexSet::print_statistics(); 282 } 283 #endif // ASSERT 284 #endif // COMPILER2 285 if (CountCompiledCalls) { 286 print_method_invocation_histogram(); 287 } 288 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) { 289 print_method_profiling_data(); 290 } 291 if (TimeCompiler) { 292 COMPILER2_PRESENT(Compile::print_timers();) 293 } 294 if (TimeCompilationPolicy) { 295 CompilationPolicy::policy()->print_time(); 296 } 297 if (TimeOopMap) { 298 GenerateOopMap::print_time(); 299 } 300 if (ProfilerCheckIntervals) { 301 PeriodicTask::print_intervals(); 302 } 303 if (PrintSymbolTableSizeHistogram) { 304 SymbolTable::print_histogram(); 305 } 306 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 307 BytecodeCounter::print(); 308 } 309 if (PrintBytecodePairHistogram) { 310 BytecodePairHistogram::print(); 311 } 312 313 if (PrintCodeCache) { 314 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 315 CodeCache::print(); 316 } 317 318 if (PrintMethodFlushingStatistics) { 319 NMethodSweeper::print(); 320 } 321 322 if (PrintCodeCache2) { 323 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 324 CodeCache::print_internals(); 325 } 326 327 if (PrintClassStatistics) { 328 SystemDictionary::print_class_statistics(); 329 } 330 if (PrintMethodStatistics) { 331 SystemDictionary::print_method_statistics(); 332 } 333 334 if (PrintVtableStats) { 335 klassVtable::print_statistics(); 336 klassItable::print_statistics(); 337 } 338 if (VerifyOops) { 339 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 340 } 341 342 print_bytecode_count(); 343 if (PrintMallocStatistics) { 344 tty->print("allocation stats: "); 345 alloc_stats.print(); 346 tty->cr(); 347 } 348 349 if (PrintSystemDictionaryAtExit) { 350 SystemDictionary::print(); 351 } 352 353 if (PrintBiasedLockingStatistics) { 354 BiasedLocking::print_counters(); 355 } 356 357 #ifdef ENABLE_ZAP_DEAD_LOCALS 358 #ifdef COMPILER2 359 if (ZapDeadCompiledLocals) { 360 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); 361 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); 362 } 363 #endif // COMPILER2 364 #endif // ENABLE_ZAP_DEAD_LOCALS 365 // Native memory tracking data 366 if (PrintNMTStatistics) { 367 MemTracker::final_report(tty); 368 } 369 } 370 371 #else // PRODUCT MODE STATISTICS 372 373 void print_statistics() { 374 375 if (CITime) { 376 CompileBroker::print_times(); 377 } 378 379 if (PrintCodeCache) { 380 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 381 CodeCache::print(); 382 } 383 384 if (PrintMethodFlushingStatistics) { 385 NMethodSweeper::print(); 386 } 387 388 #ifdef COMPILER2 389 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 390 OptoRuntime::print_named_counters(); 391 } 392 #endif 393 if (PrintBiasedLockingStatistics) { 394 BiasedLocking::print_counters(); 395 } 396 397 // Native memory tracking data 398 if (PrintNMTStatistics) { 399 MemTracker::final_report(tty); 400 } 401 } 402 403 #endif 404 405 406 // Helper class for registering on_exit calls through JVM_OnExit 407 408 extern "C" { 409 typedef void (*__exit_proc)(void); 410 } 411 412 class ExitProc : public CHeapObj<mtInternal> { 413 private: 414 __exit_proc _proc; 415 // void (*_proc)(void); 416 ExitProc* _next; 417 public: 418 // ExitProc(void (*proc)(void)) { 419 ExitProc(__exit_proc proc) { 420 _proc = proc; 421 _next = NULL; 422 } 423 void evaluate() { _proc(); } 424 ExitProc* next() const { return _next; } 425 void set_next(ExitProc* next) { _next = next; } 426 }; 427 428 429 // Linked list of registered on_exit procedures 430 431 static ExitProc* exit_procs = NULL; 432 433 434 extern "C" { 435 void register_on_exit_function(void (*func)(void)) { 436 ExitProc *entry = new ExitProc(func); 437 // Classic vm does not throw an exception in case the allocation failed, 438 if (entry != NULL) { 439 entry->set_next(exit_procs); 440 exit_procs = entry; 441 } 442 } 443 } 444 445 // Note: before_exit() can be executed only once, if more than one threads 446 // are trying to shutdown the VM at the same time, only one thread 447 // can run before_exit() and all other threads must wait. 448 void before_exit(JavaThread * thread) { 449 #define BEFORE_EXIT_NOT_RUN 0 450 #define BEFORE_EXIT_RUNNING 1 451 #define BEFORE_EXIT_DONE 2 452 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 453 454 // Note: don't use a Mutex to guard the entire before_exit(), as 455 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 456 // A CAS or OSMutex would work just fine but then we need to manipulate 457 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 458 // for synchronization. 459 { MutexLocker ml(BeforeExit_lock); 460 switch (_before_exit_status) { 461 case BEFORE_EXIT_NOT_RUN: 462 _before_exit_status = BEFORE_EXIT_RUNNING; 463 break; 464 case BEFORE_EXIT_RUNNING: 465 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 466 BeforeExit_lock->wait(); 467 } 468 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 469 return; 470 case BEFORE_EXIT_DONE: 471 return; 472 } 473 } 474 475 // The only difference between this and Win32's _onexit procs is that 476 // this version is invoked before any threads get killed. 477 ExitProc* current = exit_procs; 478 while (current != NULL) { 479 ExitProc* next = current->next(); 480 current->evaluate(); 481 delete current; 482 current = next; 483 } 484 485 // Hang forever on exit if we're reporting an error. 486 if (ShowMessageBoxOnError && is_error_reported()) { 487 os::infinite_sleep(); 488 } 489 490 // Terminate watcher thread - must before disenrolling any periodic task 491 if (PeriodicTask::num_tasks() > 0) 492 WatcherThread::stop(); 493 494 // Print statistics gathered (profiling ...) 495 if (Arguments::has_profile()) { 496 FlatProfiler::disengage(); 497 FlatProfiler::print(10); 498 } 499 500 // shut down the StatSampler task 501 StatSampler::disengage(); 502 StatSampler::destroy(); 503 504 // Stop concurrent GC threads 505 Universe::heap()->stop(); 506 507 // Print GC/heap related information. 508 if (PrintGCDetails) { 509 Universe::print(); 510 AdaptiveSizePolicyOutput(0); 511 if (Verbose) { 512 ClassLoaderDataGraph::dump_on(gclog_or_tty); 513 } 514 } 515 516 if (PrintBytecodeHistogram) { 517 BytecodeHistogram::print(); 518 } 519 520 if (JvmtiExport::should_post_thread_life()) { 521 JvmtiExport::post_thread_end(thread); 522 } 523 524 525 EventThreadEnd event; 526 if (event.should_commit()) { 527 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 528 event.commit(); 529 } 530 531 // Always call even when there are not JVMTI environments yet, since environments 532 // may be attached late and JVMTI must track phases of VM execution 533 JvmtiExport::post_vm_death(); 534 Threads::shutdown_vm_agents(); 535 536 // Terminate the signal thread 537 // Note: we don't wait until it actually dies. 538 os::terminate_signal_thread(); 539 540 print_statistics(); 541 Universe::heap()->print_tracing_info(); 542 543 { MutexLocker ml(BeforeExit_lock); 544 _before_exit_status = BEFORE_EXIT_DONE; 545 BeforeExit_lock->notify_all(); 546 } 547 548 if (VerifyStringTableAtExit) { 549 int fail_cnt = 0; 550 { 551 MutexLocker ml(StringTable_lock); 552 fail_cnt = StringTable::verify_and_compare_entries(); 553 } 554 555 if (fail_cnt != 0) { 556 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 557 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 558 } 559 } 560 561 #undef BEFORE_EXIT_NOT_RUN 562 #undef BEFORE_EXIT_RUNNING 563 #undef BEFORE_EXIT_DONE 564 } 565 566 void vm_exit(int code) { 567 Thread* thread = ThreadLocalStorage::is_initialized() ? 568 ThreadLocalStorage::get_thread_slow() : NULL; 569 if (thread == NULL) { 570 // we have serious problems -- just exit 571 vm_direct_exit(code); 572 } 573 574 if (VMThread::vm_thread() != NULL) { 575 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 576 VM_Exit op(code); 577 if (thread->is_Java_thread()) 578 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 579 VMThread::execute(&op); 580 // should never reach here; but in case something wrong with VM Thread. 581 vm_direct_exit(code); 582 } else { 583 // VM thread is gone, just exit 584 vm_direct_exit(code); 585 } 586 ShouldNotReachHere(); 587 } 588 589 void notify_vm_shutdown() { 590 // For now, just a dtrace probe. 591 #ifndef USDT2 592 HS_DTRACE_PROBE(hotspot, vm__shutdown); 593 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 594 #else /* USDT2 */ 595 HOTSPOT_VM_SHUTDOWN(); 596 #endif /* USDT2 */ 597 } 598 599 void vm_direct_exit(int code) { 600 notify_vm_shutdown(); 601 os::wait_for_keypress_at_exit(); 602 ::exit(code); 603 } 604 605 void vm_perform_shutdown_actions() { 606 // Warning: do not call 'exit_globals()' here. All threads are still running. 607 // Calling 'exit_globals()' will disable thread-local-storage and cause all 608 // kinds of assertions to trigger in debug mode. 609 if (is_init_completed()) { 610 Thread* thread = ThreadLocalStorage::is_initialized() ? 611 ThreadLocalStorage::get_thread_slow() : NULL; 612 if (thread != NULL && thread->is_Java_thread()) { 613 // We are leaving the VM, set state to native (in case any OS exit 614 // handlers call back to the VM) 615 JavaThread* jt = (JavaThread*)thread; 616 // Must always be walkable or have no last_Java_frame when in 617 // thread_in_native 618 jt->frame_anchor()->make_walkable(jt); 619 jt->set_thread_state(_thread_in_native); 620 } 621 } 622 notify_vm_shutdown(); 623 } 624 625 void vm_shutdown() 626 { 627 vm_perform_shutdown_actions(); 628 os::wait_for_keypress_at_exit(); 629 os::shutdown(); 630 } 631 632 void vm_abort(bool dump_core) { 633 vm_perform_shutdown_actions(); 634 os::wait_for_keypress_at_exit(); 635 os::abort(dump_core); 636 ShouldNotReachHere(); 637 } 638 639 void vm_notify_during_shutdown(const char* error, const char* message) { 640 if (error != NULL) { 641 tty->print_cr("Error occurred during initialization of VM"); 642 tty->print("%s", error); 643 if (message != NULL) { 644 tty->print_cr(": %s", message); 645 } 646 else { 647 tty->cr(); 648 } 649 } 650 if (ShowMessageBoxOnError && WizardMode) { 651 fatal("Error occurred during initialization of VM"); 652 } 653 } 654 655 void vm_exit_during_initialization(Handle exception) { 656 tty->print_cr("Error occurred during initialization of VM"); 657 // If there are exceptions on this thread it must be cleared 658 // first and here. Any future calls to EXCEPTION_MARK requires 659 // that no pending exceptions exist. 660 Thread *THREAD = Thread::current(); 661 if (HAS_PENDING_EXCEPTION) { 662 CLEAR_PENDING_EXCEPTION; 663 } 664 java_lang_Throwable::print(exception, tty); 665 tty->cr(); 666 java_lang_Throwable::print_stack_trace(exception(), tty); 667 tty->cr(); 668 vm_notify_during_shutdown(NULL, NULL); 669 670 // Failure during initialization, we don't want to dump core 671 vm_abort(false); 672 } 673 674 void vm_exit_during_initialization(Symbol* ex, const char* message) { 675 ResourceMark rm; 676 vm_notify_during_shutdown(ex->as_C_string(), message); 677 678 // Failure during initialization, we don't want to dump core 679 vm_abort(false); 680 } 681 682 void vm_exit_during_initialization(const char* error, const char* message) { 683 vm_notify_during_shutdown(error, message); 684 685 // Failure during initialization, we don't want to dump core 686 vm_abort(false); 687 } 688 689 void vm_shutdown_during_initialization(const char* error, const char* message) { 690 vm_notify_during_shutdown(error, message); 691 vm_shutdown(); 692 } 693 694 JDK_Version JDK_Version::_current; 695 const char* JDK_Version::_runtime_name; 696 const char* JDK_Version::_runtime_version; 697 698 void JDK_Version::initialize() { 699 jdk_version_info info; 700 assert(!_current.is_valid(), "Don't initialize twice"); 701 702 void *lib_handle = os::native_java_library(); 703 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 704 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 705 706 if (func == NULL) { 707 // JDK older than 1.6 708 _current._partially_initialized = true; 709 } else { 710 (*func)(&info, sizeof(info)); 711 712 int major = JDK_VERSION_MAJOR(info.jdk_version); 713 int minor = JDK_VERSION_MINOR(info.jdk_version); 714 int micro = JDK_VERSION_MICRO(info.jdk_version); 715 int build = JDK_VERSION_BUILD(info.jdk_version); 716 if (major == 1 && minor > 4) { 717 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 718 major = minor; 719 minor = micro; 720 micro = 0; 721 } 722 _current = JDK_Version(major, minor, micro, info.update_version, 723 info.special_update_version, build, 724 info.thread_park_blocker == 1, 725 info.post_vm_init_hook_enabled == 1, 726 info.pending_list_uses_discovered_field == 1); 727 } 728 } 729 730 void JDK_Version::fully_initialize( 731 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 732 // This is only called when current is less than 1.6 and we've gotten 733 // far enough in the initialization to determine the exact version. 734 assert(major < 6, "not needed for JDK version >= 6"); 735 assert(is_partially_initialized(), "must not initialize"); 736 if (major < 5) { 737 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 738 micro = minor; 739 minor = major; 740 major = 1; 741 } 742 _current = JDK_Version(major, minor, micro, update); 743 } 744 745 void JDK_Version_init() { 746 JDK_Version::initialize(); 747 } 748 749 static int64_t encode_jdk_version(const JDK_Version& v) { 750 return 751 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 752 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 753 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 754 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 755 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 756 ((int64_t)v.build_number() << (BitsPerByte * 0)); 757 } 758 759 int JDK_Version::compare(const JDK_Version& other) const { 760 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 761 if (!is_partially_initialized() && other.is_partially_initialized()) { 762 return -(other.compare(*this)); // flip the comparators 763 } 764 assert(!other.is_partially_initialized(), "Not initialized yet"); 765 if (is_partially_initialized()) { 766 assert(other.major_version() >= 6, 767 "Invalid JDK version comparison during initialization"); 768 return -1; 769 } else { 770 uint64_t e = encode_jdk_version(*this); 771 uint64_t o = encode_jdk_version(other); 772 return (e > o) ? 1 : ((e == o) ? 0 : -1); 773 } 774 } 775 776 void JDK_Version::to_string(char* buffer, size_t buflen) const { 777 assert(buffer && buflen > 0, "call with useful buffer"); 778 size_t index = 0; 779 if (!is_valid()) { 780 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 781 } else if (is_partially_initialized()) { 782 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 783 } else { 784 int rc = jio_snprintf( 785 &buffer[index], buflen - index, "%d.%d", _major, _minor); 786 if (rc == -1) return; 787 index += rc; 788 if (_micro > 0) { 789 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 790 if (rc == -1) return; 791 index += rc; 792 } 793 if (_update > 0) { 794 rc = jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 795 if (rc == -1) return; 796 index += rc; 797 } 798 if (_special > 0) { 799 rc = jio_snprintf(&buffer[index], buflen - index, "%c", _special); 800 if (rc == -1) return; 801 index += rc; 802 } 803 if (_build > 0) { 804 rc = jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 805 if (rc == -1) return; 806 index += rc; 807 } 808 } 809 }