1 /* 2 * Copyright (c) 1997, 2018, 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 "jvm.h" 27 #include "aot/aotLoader.hpp" 28 #include "classfile/classLoader.hpp" 29 #include "classfile/stringTable.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "code/codeCache.hpp" 32 #include "compiler/compileBroker.hpp" 33 #include "compiler/compilerOracle.hpp" 34 #include "interpreter/bytecodeHistogram.hpp" 35 #include "jfr/jfrEvents.hpp" 36 #include "jfr/support/jfrThreadId.hpp" 37 #if INCLUDE_JVMCI 38 #include "jvmci/jvmciCompiler.hpp" 39 #include "jvmci/jvmciRuntime.hpp" 40 #endif 41 #include "logging/log.hpp" 42 #include "logging/logStream.hpp" 43 #include "memory/oopFactory.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "memory/universe.hpp" 46 #include "oops/constantPool.hpp" 47 #include "oops/generateOopMap.hpp" 48 #include "oops/instanceKlass.hpp" 49 #include "oops/instanceOop.hpp" 50 #include "oops/method.hpp" 51 #include "oops/objArrayOop.hpp" 52 #include "oops/oop.inline.hpp" 53 #include "oops/symbol.hpp" 54 #include "prims/jvmtiExport.hpp" 55 #include "runtime/arguments.hpp" 56 #include "runtime/biasedLocking.hpp" 57 #include "runtime/compilationPolicy.hpp" 58 #include "runtime/deoptimization.hpp" 59 #include "runtime/flags/flagSetting.hpp" 60 #include "runtime/init.hpp" 61 #include "runtime/interfaceSupport.inline.hpp" 62 #include "runtime/java.hpp" 63 #include "runtime/memprofiler.hpp" 64 #include "runtime/sharedRuntime.hpp" 65 #include "runtime/statSampler.hpp" 66 #include "runtime/sweeper.hpp" 67 #include "runtime/task.hpp" 68 #include "runtime/thread.inline.hpp" 69 #include "runtime/timer.hpp" 70 #include "runtime/vm_operations.hpp" 71 #include "services/memTracker.hpp" 72 #include "utilities/dtrace.hpp" 73 #include "utilities/globalDefinitions.hpp" 74 #include "utilities/histogram.hpp" 75 #include "utilities/macros.hpp" 76 #include "utilities/vmError.hpp" 77 #ifdef COMPILER1 78 #include "c1/c1_Compiler.hpp" 79 #include "c1/c1_Runtime1.hpp" 80 #endif 81 #ifdef COMPILER2 82 #include "code/compiledIC.hpp" 83 #include "compiler/methodLiveness.hpp" 84 #include "opto/compile.hpp" 85 #include "opto/indexSet.hpp" 86 #include "opto/runtime.hpp" 87 #endif 88 #if INCLUDE_JFR 89 #include "jfr/jfr.hpp" 90 #endif 91 92 GrowableArray<Method*>* collected_profiled_methods; 93 94 int compare_methods(Method** a, Method** b) { 95 // %%% there can be 32-bit overflow here 96 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 97 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 98 } 99 100 void collect_profiled_methods(Method* m) { 101 Thread* thread = Thread::current(); 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 SystemDictionary::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 Method Invocation Counters (cutoff = " INTX_FORMAT "):", 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 // COMPILER2 270 #if 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 // COMPILER1 278 #endif // INCLUDE_JVMCI 279 #endif // COMPILER2 280 281 if (PrintAOTStatistics) { 282 AOTLoader::print_statistics(); 283 } 284 285 if (PrintNMethodStatistics) { 286 nmethod::print_statistics(); 287 } 288 if (CountCompiledCalls) { 289 print_method_invocation_histogram(); 290 } 291 292 print_method_profiling_data(); 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 // CodeHeap State Analytics. 319 // Does also call NMethodSweeper::print(tty) 320 LogTarget(Trace, codecache) lt; 321 if (lt.is_enabled()) { 322 CompileBroker::print_heapinfo(NULL, "all", "4096"); // details 323 } else if (PrintMethodFlushingStatistics) { 324 NMethodSweeper::print(tty); 325 } 326 327 if (PrintCodeCache2) { 328 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 329 CodeCache::print_internals(); 330 } 331 332 if (PrintVtableStats) { 333 klassVtable::print_statistics(); 334 klassItable::print_statistics(); 335 } 336 if (VerifyOops) { 337 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 338 } 339 340 print_bytecode_count(); 341 if (PrintMallocStatistics) { 342 tty->print("allocation stats: "); 343 alloc_stats.print(); 344 tty->cr(); 345 } 346 347 if (PrintSystemDictionaryAtExit) { 348 ResourceMark rm; 349 SystemDictionary::print(); 350 ClassLoaderDataGraph::print(); 351 } 352 353 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 354 Method::print_touched_methods(tty); 355 } 356 357 if (PrintBiasedLockingStatistics) { 358 BiasedLocking::print_counters(); 359 } 360 361 // Native memory tracking data 362 if (PrintNMTStatistics) { 363 MemTracker::final_report(tty); 364 } 365 366 ThreadsSMRSupport::log_statistics(); 367 } 368 369 #else // PRODUCT MODE STATISTICS 370 371 void print_statistics() { 372 373 if (PrintMethodData) { 374 print_method_profiling_data(); 375 } 376 377 if (CITime) { 378 CompileBroker::print_times(); 379 } 380 381 if (PrintCodeCache) { 382 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 383 CodeCache::print(); 384 } 385 386 // CodeHeap State Analytics. 387 // Does also call NMethodSweeper::print(tty) 388 LogTarget(Trace, codecache) lt; 389 if (lt.is_enabled()) { 390 CompileBroker::print_heapinfo(NULL, "all", "4096"); // details 391 } else if (PrintMethodFlushingStatistics) { 392 NMethodSweeper::print(tty); 393 } 394 395 #ifdef COMPILER2 396 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 397 OptoRuntime::print_named_counters(); 398 } 399 #endif 400 if (PrintBiasedLockingStatistics) { 401 BiasedLocking::print_counters(); 402 } 403 404 // Native memory tracking data 405 if (PrintNMTStatistics) { 406 MemTracker::final_report(tty); 407 } 408 409 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 410 Method::print_touched_methods(tty); 411 } 412 413 ThreadsSMRSupport::log_statistics(); 414 } 415 416 #endif 417 418 // Note: before_exit() can be executed only once, if more than one threads 419 // are trying to shutdown the VM at the same time, only one thread 420 // can run before_exit() and all other threads must wait. 421 void before_exit(JavaThread* thread) { 422 #define BEFORE_EXIT_NOT_RUN 0 423 #define BEFORE_EXIT_RUNNING 1 424 #define BEFORE_EXIT_DONE 2 425 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 426 427 // Note: don't use a Mutex to guard the entire before_exit(), as 428 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 429 // A CAS or OSMutex would work just fine but then we need to manipulate 430 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 431 // for synchronization. 432 { MutexLocker ml(BeforeExit_lock); 433 switch (_before_exit_status) { 434 case BEFORE_EXIT_NOT_RUN: 435 _before_exit_status = BEFORE_EXIT_RUNNING; 436 break; 437 case BEFORE_EXIT_RUNNING: 438 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 439 BeforeExit_lock->wait(); 440 } 441 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 442 return; 443 case BEFORE_EXIT_DONE: 444 // need block to avoid SS compiler bug 445 { 446 return; 447 } 448 } 449 } 450 451 #if INCLUDE_JVMCI 452 // We are not using CATCH here because we want the exit to continue normally. 453 Thread* THREAD = thread; 454 JVMCIRuntime::shutdown(THREAD); 455 if (HAS_PENDING_EXCEPTION) { 456 HandleMark hm(THREAD); 457 Handle exception(THREAD, PENDING_EXCEPTION); 458 CLEAR_PENDING_EXCEPTION; 459 java_lang_Throwable::java_printStackTrace(exception, THREAD); 460 } 461 #endif 462 463 // Hang forever on exit if we're reporting an error. 464 if (ShowMessageBoxOnError && VMError::is_error_reported()) { 465 os::infinite_sleep(); 466 } 467 468 EventThreadEnd event; 469 if (event.should_commit()) { 470 event.set_thread(JFR_THREAD_ID(thread)); 471 event.commit(); 472 } 473 474 JFR_ONLY(Jfr::on_vm_shutdown();) 475 476 // Stop the WatcherThread. We do this before disenrolling various 477 // PeriodicTasks to reduce the likelihood of races. 478 if (PeriodicTask::num_tasks() > 0) { 479 WatcherThread::stop(); 480 } 481 482 // shut down the StatSampler task 483 StatSampler::disengage(); 484 StatSampler::destroy(); 485 486 // Stop concurrent GC threads 487 Universe::heap()->stop(); 488 489 // Print GC/heap related information. 490 Log(gc, heap, exit) log; 491 if (log.is_info()) { 492 ResourceMark rm; 493 LogStream ls_info(log.info()); 494 Universe::print_on(&ls_info); 495 if (log.is_trace()) { 496 LogStream ls_trace(log.trace()); 497 ClassLoaderDataGraph::print_on(&ls_trace); 498 } 499 } 500 501 if (PrintBytecodeHistogram) { 502 BytecodeHistogram::print(); 503 } 504 505 if (JvmtiExport::should_post_thread_life()) { 506 JvmtiExport::post_thread_end(thread); 507 } 508 509 // Always call even when there are not JVMTI environments yet, since environments 510 // may be attached late and JVMTI must track phases of VM execution 511 JvmtiExport::post_vm_death(); 512 Threads::shutdown_vm_agents(); 513 514 // Terminate the signal thread 515 // Note: we don't wait until it actually dies. 516 os::terminate_signal_thread(); 517 518 print_statistics(); 519 Universe::heap()->print_tracing_info(); 520 521 { MutexLocker ml(BeforeExit_lock); 522 _before_exit_status = BEFORE_EXIT_DONE; 523 BeforeExit_lock->notify_all(); 524 } 525 526 if (VerifyStringTableAtExit) { 527 int fail_cnt = 0; 528 { 529 MutexLocker ml(StringTable_lock); 530 fail_cnt = StringTable::verify_and_compare_entries(); 531 } 532 533 if (fail_cnt != 0) { 534 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 535 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 536 } 537 } 538 539 #undef BEFORE_EXIT_NOT_RUN 540 #undef BEFORE_EXIT_RUNNING 541 #undef BEFORE_EXIT_DONE 542 } 543 544 void vm_exit(int code) { 545 Thread* thread = 546 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL; 547 if (thread == NULL) { 548 // very early initialization failure -- just exit 549 vm_direct_exit(code); 550 } 551 552 if (VMThread::vm_thread() != NULL) { 553 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 554 VM_Exit op(code); 555 if (thread->is_Java_thread()) 556 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 557 VMThread::execute(&op); 558 // should never reach here; but in case something wrong with VM Thread. 559 vm_direct_exit(code); 560 } else { 561 // VM thread is gone, just exit 562 vm_direct_exit(code); 563 } 564 ShouldNotReachHere(); 565 } 566 567 void notify_vm_shutdown() { 568 // For now, just a dtrace probe. 569 HOTSPOT_VM_SHUTDOWN(); 570 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 571 } 572 573 void vm_direct_exit(int code) { 574 notify_vm_shutdown(); 575 os::wait_for_keypress_at_exit(); 576 os::exit(code); 577 } 578 579 void vm_perform_shutdown_actions() { 580 // Warning: do not call 'exit_globals()' here. All threads are still running. 581 // Calling 'exit_globals()' will disable thread-local-storage and cause all 582 // kinds of assertions to trigger in debug mode. 583 if (is_init_completed()) { 584 Thread* thread = Thread::current_or_null(); 585 if (thread != NULL && thread->is_Java_thread()) { 586 // We are leaving the VM, set state to native (in case any OS exit 587 // handlers call back to the VM) 588 JavaThread* jt = (JavaThread*)thread; 589 // Must always be walkable or have no last_Java_frame when in 590 // thread_in_native 591 jt->frame_anchor()->make_walkable(jt); 592 jt->set_thread_state(_thread_in_native); 593 } 594 } 595 notify_vm_shutdown(); 596 } 597 598 void vm_shutdown() 599 { 600 vm_perform_shutdown_actions(); 601 os::wait_for_keypress_at_exit(); 602 os::shutdown(); 603 } 604 605 void vm_abort(bool dump_core) { 606 vm_perform_shutdown_actions(); 607 os::wait_for_keypress_at_exit(); 608 609 // Flush stdout and stderr before abort. 610 fflush(stdout); 611 fflush(stderr); 612 613 os::abort(dump_core); 614 ShouldNotReachHere(); 615 } 616 617 void vm_notify_during_shutdown(const char* error, const char* message) { 618 if (error != NULL) { 619 tty->print_cr("Error occurred during initialization of VM"); 620 tty->print("%s", error); 621 if (message != NULL) { 622 tty->print_cr(": %s", message); 623 } 624 else { 625 tty->cr(); 626 } 627 } 628 if (ShowMessageBoxOnError && WizardMode) { 629 fatal("Error occurred during initialization of VM"); 630 } 631 } 632 633 void vm_exit_during_initialization() { 634 vm_notify_during_shutdown(NULL, NULL); 635 636 // Failure during initialization, we don't want to dump core 637 vm_abort(false); 638 } 639 640 void vm_exit_during_initialization(Handle exception) { 641 tty->print_cr("Error occurred during initialization of VM"); 642 // If there are exceptions on this thread it must be cleared 643 // first and here. Any future calls to EXCEPTION_MARK requires 644 // that no pending exceptions exist. 645 Thread *THREAD = Thread::current(); // can't be NULL 646 if (HAS_PENDING_EXCEPTION) { 647 CLEAR_PENDING_EXCEPTION; 648 } 649 java_lang_Throwable::print_stack_trace(exception, tty); 650 tty->cr(); 651 vm_notify_during_shutdown(NULL, NULL); 652 653 // Failure during initialization, we don't want to dump core 654 vm_abort(false); 655 } 656 657 void vm_exit_during_initialization(Symbol* ex, const char* message) { 658 ResourceMark rm; 659 vm_notify_during_shutdown(ex->as_C_string(), message); 660 661 // Failure during initialization, we don't want to dump core 662 vm_abort(false); 663 } 664 665 void vm_exit_during_initialization(const char* error, const char* message) { 666 vm_notify_during_shutdown(error, message); 667 668 // Failure during initialization, we don't want to dump core 669 vm_abort(false); 670 } 671 672 void vm_shutdown_during_initialization(const char* error, const char* message) { 673 vm_notify_during_shutdown(error, message); 674 vm_shutdown(); 675 } 676 677 JDK_Version JDK_Version::_current; 678 const char* JDK_Version::_runtime_name; 679 const char* JDK_Version::_runtime_version; 680 681 void JDK_Version::initialize() { 682 jdk_version_info info; 683 assert(!_current.is_valid(), "Don't initialize twice"); 684 685 void *lib_handle = os::native_java_library(); 686 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 687 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 688 689 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223"); 690 691 (*func)(&info, sizeof(info)); 692 693 int major = JDK_VERSION_MAJOR(info.jdk_version); 694 int minor = JDK_VERSION_MINOR(info.jdk_version); 695 int security = JDK_VERSION_SECURITY(info.jdk_version); 696 int build = JDK_VERSION_BUILD(info.jdk_version); 697 698 // Incompatible with pre-4243978 JDK. 699 if (info.pending_list_uses_discovered_field == 0) { 700 vm_exit_during_initialization( 701 "Incompatible JDK is not using Reference.discovered field for pending list"); 702 } 703 _current = JDK_Version(major, minor, security, info.patch_version, build, 704 info.thread_park_blocker == 1, 705 info.post_vm_init_hook_enabled == 1); 706 } 707 708 void JDK_Version_init() { 709 JDK_Version::initialize(); 710 } 711 712 static int64_t encode_jdk_version(const JDK_Version& v) { 713 return 714 ((int64_t)v.major_version() << (BitsPerByte * 4)) | 715 ((int64_t)v.minor_version() << (BitsPerByte * 3)) | 716 ((int64_t)v.security_version() << (BitsPerByte * 2)) | 717 ((int64_t)v.patch_version() << (BitsPerByte * 1)) | 718 ((int64_t)v.build_number() << (BitsPerByte * 0)); 719 } 720 721 int JDK_Version::compare(const JDK_Version& other) const { 722 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 723 uint64_t e = encode_jdk_version(*this); 724 uint64_t o = encode_jdk_version(other); 725 return (e > o) ? 1 : ((e == o) ? 0 : -1); 726 } 727 728 void JDK_Version::to_string(char* buffer, size_t buflen) const { 729 assert(buffer && buflen > 0, "call with useful buffer"); 730 size_t index = 0; 731 732 if (!is_valid()) { 733 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 734 } else { 735 int rc = jio_snprintf( 736 &buffer[index], buflen - index, "%d.%d", _major, _minor); 737 if (rc == -1) return; 738 index += rc; 739 if (_security > 0) { 740 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security); 741 if (rc == -1) return; 742 index += rc; 743 } 744 if (_patch > 0) { 745 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch); 746 if (rc == -1) return; 747 index += rc; 748 } 749 if (_build > 0) { 750 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build); 751 if (rc == -1) return; 752 index += rc; 753 } 754 } 755 }