1 /* 2 * Copyright (c) 1997, 2017, 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 "aot/aotLoader.hpp" 27 #include "classfile/classLoader.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/systemDictionary.hpp" 30 #include "code/codeCache.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/compilerOracle.hpp" 33 #include "gc/shared/genCollectedHeap.hpp" 34 #include "interpreter/bytecodeHistogram.hpp" 35 #if INCLUDE_JVMCI 36 #include "jvmci/jvmciCompiler.hpp" 37 #include "jvmci/jvmciRuntime.hpp" 38 #endif 39 #include "logging/log.hpp" 40 #include "memory/oopFactory.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "memory/universe.hpp" 43 #include "oops/constantPool.hpp" 44 #include "oops/generateOopMap.hpp" 45 #include "oops/instanceKlass.hpp" 46 #include "oops/instanceOop.hpp" 47 #include "oops/method.hpp" 48 #include "oops/objArrayOop.hpp" 49 #include "oops/oop.inline.hpp" 50 #include "oops/symbol.hpp" 51 #include "prims/jvm.h" 52 #include "prims/jvmtiExport.hpp" 53 #include "runtime/arguments.hpp" 54 #include "runtime/biasedLocking.hpp" 55 #include "runtime/compilationPolicy.hpp" 56 #include "runtime/deoptimization.hpp" 57 #include "runtime/fprofiler.hpp" 58 #include "runtime/init.hpp" 59 #include "runtime/interfaceSupport.hpp" 60 #include "runtime/java.hpp" 61 #include "runtime/memprofiler.hpp" 62 #include "runtime/sharedRuntime.hpp" 63 #include "runtime/statSampler.hpp" 64 #include "runtime/sweeper.hpp" 65 #include "runtime/task.hpp" 66 #include "runtime/thread.inline.hpp" 67 #include "runtime/timer.hpp" 68 #include "runtime/vm_operations.hpp" 69 #include "services/memTracker.hpp" 70 #include "trace/traceMacros.hpp" 71 #include "trace/tracing.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 #if INCLUDE_ALL_GCS 78 #include "gc/cms/concurrentMarkSweepThread.hpp" 79 #include "gc/parallel/parallelScavengeHeap.hpp" 80 #include "gc/parallel/psScavenge.hpp" 81 #endif // INCLUDE_ALL_GCS 82 #ifdef COMPILER1 83 #include "c1/c1_Compiler.hpp" 84 #include "c1/c1_Runtime1.hpp" 85 #endif 86 #ifdef COMPILER2 87 #include "code/compiledIC.hpp" 88 #include "compiler/methodLiveness.hpp" 89 #include "opto/compile.hpp" 90 #include "opto/indexSet.hpp" 91 #include "opto/runtime.hpp" 92 #endif 93 94 GrowableArray<Method*>* collected_profiled_methods; 95 96 int compare_methods(Method** a, Method** b) { 97 // %%% there can be 32-bit overflow here 98 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 99 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 100 } 101 102 void collect_profiled_methods(Method* m) { 103 Thread* thread = Thread::current(); 104 methodHandle mh(thread, m); 105 if ((m->method_data() != NULL) && 106 (PrintMethodData || CompilerOracle::should_print(mh))) { 107 collected_profiled_methods->push(m); 108 } 109 } 110 111 void print_method_profiling_data() { 112 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) && 113 (PrintMethodData || CompilerOracle::should_print_methods())) { 114 ResourceMark rm; 115 HandleMark hm; 116 collected_profiled_methods = new GrowableArray<Method*>(1024); 117 SystemDictionary::methods_do(collect_profiled_methods); 118 collected_profiled_methods->sort(&compare_methods); 119 120 int count = collected_profiled_methods->length(); 121 int total_size = 0; 122 if (count > 0) { 123 for (int index = 0; index < count; index++) { 124 Method* m = collected_profiled_methods->at(index); 125 ttyLocker ttyl; 126 tty->print_cr("------------------------------------------------------------------------"); 127 m->print_invocation_count(); 128 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 129 tty->cr(); 130 // Dump data on parameters if any 131 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 132 tty->fill_to(2); 133 m->method_data()->parameters_type_data()->print_data_on(tty); 134 } 135 m->print_codes(); 136 total_size += m->method_data()->size_in_bytes(); 137 } 138 tty->print_cr("------------------------------------------------------------------------"); 139 tty->print_cr("Total MDO size: %d bytes", total_size); 140 } 141 } 142 } 143 144 145 #ifndef PRODUCT 146 147 // Statistics printing (method invocation histogram) 148 149 GrowableArray<Method*>* collected_invoked_methods; 150 151 void collect_invoked_methods(Method* m) { 152 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 153 collected_invoked_methods->push(m); 154 } 155 } 156 157 158 159 160 void print_method_invocation_histogram() { 161 ResourceMark rm; 162 HandleMark hm; 163 collected_invoked_methods = new GrowableArray<Method*>(1024); 164 SystemDictionary::methods_do(collect_invoked_methods); 165 collected_invoked_methods->sort(&compare_methods); 166 // 167 tty->cr(); 168 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff); 169 tty->cr(); 170 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 171 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 172 synch_total = 0, nativ_total = 0, acces_total = 0; 173 for (int index = 0; index < collected_invoked_methods->length(); index++) { 174 Method* m = collected_invoked_methods->at(index); 175 int c = m->invocation_count() + m->compiled_invocation_count(); 176 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 177 int_total += m->invocation_count(); 178 comp_total += m->compiled_invocation_count(); 179 if (m->is_final()) final_total += c; 180 if (m->is_static()) static_total += c; 181 if (m->is_synchronized()) synch_total += c; 182 if (m->is_native()) nativ_total += c; 183 if (m->is_accessor()) acces_total += c; 184 } 185 tty->cr(); 186 total = int_total + comp_total; 187 tty->print_cr("Invocations summary:"); 188 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 189 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 190 tty->print_cr("\t%9d (100%%) total", total); 191 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 192 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 193 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 194 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 195 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 196 tty->cr(); 197 SharedRuntime::print_call_statistics(comp_total); 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 void print_statistics() { 212 #ifdef ASSERT 213 214 if (CountRuntimeCalls) { 215 extern Histogram *RuntimeHistogram; 216 RuntimeHistogram->print(); 217 } 218 219 if (CountJNICalls) { 220 extern Histogram *JNIHistogram; 221 JNIHistogram->print(); 222 } 223 224 if (CountJVMCalls) { 225 extern Histogram *JVMHistogram; 226 JVMHistogram->print(); 227 } 228 229 #endif 230 231 if (MemProfiling) { 232 MemProfiler::disengage(); 233 } 234 235 if (CITime) { 236 CompileBroker::print_times(); 237 } 238 239 #ifdef COMPILER1 240 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 241 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 242 Runtime1::print_statistics(); 243 Deoptimization::print_statistics(); 244 SharedRuntime::print_statistics(); 245 } 246 #endif /* COMPILER1 */ 247 248 #ifdef COMPILER2 249 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 250 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 251 Compile::print_statistics(); 252 #ifndef COMPILER1 253 Deoptimization::print_statistics(); 254 SharedRuntime::print_statistics(); 255 #endif //COMPILER1 256 os::print_statistics(); 257 } 258 259 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 260 OptoRuntime::print_named_counters(); 261 } 262 263 if (TimeLivenessAnalysis) { 264 MethodLiveness::print_times(); 265 } 266 #ifdef ASSERT 267 if (CollectIndexSetStatistics) { 268 IndexSet::print_statistics(); 269 } 270 #endif // ASSERT 271 #else 272 #ifdef INCLUDE_JVMCI 273 #ifndef COMPILER1 274 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) { 275 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization); 276 Deoptimization::print_statistics(); 277 SharedRuntime::print_statistics(); 278 } 279 #endif 280 #endif 281 #endif 282 283 if (PrintAOTStatistics) { 284 AOTLoader::print_statistics(); 285 } 286 287 if (PrintNMethodStatistics) { 288 nmethod::print_statistics(); 289 } 290 if (CountCompiledCalls) { 291 print_method_invocation_histogram(); 292 } 293 294 print_method_profiling_data(); 295 296 if (TimeCompilationPolicy) { 297 CompilationPolicy::policy()->print_time(); 298 } 299 if (TimeOopMap) { 300 GenerateOopMap::print_time(); 301 } 302 if (ProfilerCheckIntervals) { 303 PeriodicTask::print_intervals(); 304 } 305 if (PrintSymbolTableSizeHistogram) { 306 SymbolTable::print_histogram(); 307 } 308 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 309 BytecodeCounter::print(); 310 } 311 if (PrintBytecodePairHistogram) { 312 BytecodePairHistogram::print(); 313 } 314 315 if (PrintCodeCache) { 316 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 317 CodeCache::print(); 318 } 319 320 if (PrintMethodFlushingStatistics) { 321 NMethodSweeper::print(); 322 } 323 324 if (PrintCodeCache2) { 325 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 326 CodeCache::print_internals(); 327 } 328 329 if (PrintVtableStats) { 330 klassVtable::print_statistics(); 331 klassItable::print_statistics(); 332 } 333 if (VerifyOops) { 334 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 335 } 336 337 print_bytecode_count(); 338 if (PrintMallocStatistics) { 339 tty->print("allocation stats: "); 340 alloc_stats.print(); 341 tty->cr(); 342 } 343 344 if (PrintSystemDictionaryAtExit) { 345 SystemDictionary::print(); 346 } 347 348 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 349 Method::print_touched_methods(tty); 350 } 351 352 if (PrintBiasedLockingStatistics) { 353 BiasedLocking::print_counters(); 354 } 355 356 // Native memory tracking data 357 if (PrintNMTStatistics) { 358 MemTracker::final_report(tty); 359 } 360 } 361 362 #else // PRODUCT MODE STATISTICS 363 364 void print_statistics() { 365 366 if (PrintMethodData) { 367 print_method_profiling_data(); 368 } 369 370 if (CITime) { 371 CompileBroker::print_times(); 372 } 373 374 if (PrintCodeCache) { 375 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 376 CodeCache::print(); 377 } 378 379 if (PrintMethodFlushingStatistics) { 380 NMethodSweeper::print(); 381 } 382 383 #ifdef COMPILER2 384 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 385 OptoRuntime::print_named_counters(); 386 } 387 #endif 388 if (PrintBiasedLockingStatistics) { 389 BiasedLocking::print_counters(); 390 } 391 392 // Native memory tracking data 393 if (PrintNMTStatistics) { 394 MemTracker::final_report(tty); 395 } 396 397 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 398 Method::print_touched_methods(tty); 399 } 400 } 401 402 #endif 403 404 // Note: before_exit() can be executed only once, if more than one threads 405 // are trying to shutdown the VM at the same time, only one thread 406 // can run before_exit() and all other threads must wait. 407 void before_exit(JavaThread* thread) { 408 #define BEFORE_EXIT_NOT_RUN 0 409 #define BEFORE_EXIT_RUNNING 1 410 #define BEFORE_EXIT_DONE 2 411 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 412 413 // Note: don't use a Mutex to guard the entire before_exit(), as 414 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 415 // A CAS or OSMutex would work just fine but then we need to manipulate 416 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 417 // for synchronization. 418 { MutexLocker ml(BeforeExit_lock); 419 switch (_before_exit_status) { 420 case BEFORE_EXIT_NOT_RUN: 421 _before_exit_status = BEFORE_EXIT_RUNNING; 422 break; 423 case BEFORE_EXIT_RUNNING: 424 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 425 BeforeExit_lock->wait(); 426 } 427 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 428 return; 429 case BEFORE_EXIT_DONE: 430 // need block to avoid SS compiler bug 431 { 432 return; 433 } 434 } 435 } 436 437 #if INCLUDE_JVMCI 438 // We are not using CATCH here because we want the exit to continue normally. 439 Thread* THREAD = thread; 440 JVMCIRuntime::shutdown(THREAD); 441 if (HAS_PENDING_EXCEPTION) { 442 HandleMark hm(THREAD); 443 Handle exception(THREAD, PENDING_EXCEPTION); 444 CLEAR_PENDING_EXCEPTION; 445 java_lang_Throwable::java_printStackTrace(exception, THREAD); 446 } 447 #endif 448 449 // Hang forever on exit if we're reporting an error. 450 if (ShowMessageBoxOnError && VMError::is_error_reported()) { 451 os::infinite_sleep(); 452 } 453 454 EventThreadEnd event; 455 if (event.should_commit()) { 456 event.set_thread(THREAD_TRACE_ID(thread)); 457 event.commit(); 458 } 459 460 TRACE_VM_EXIT(); 461 462 // Stop the WatcherThread. We do this before disenrolling various 463 // PeriodicTasks to reduce the likelihood of races. 464 if (PeriodicTask::num_tasks() > 0) { 465 WatcherThread::stop(); 466 } 467 468 // Print statistics gathered (profiling ...) 469 if (Arguments::has_profile()) { 470 FlatProfiler::disengage(); 471 FlatProfiler::print(10); 472 } 473 474 // shut down the StatSampler task 475 StatSampler::disengage(); 476 StatSampler::destroy(); 477 478 // Stop concurrent GC threads 479 Universe::heap()->stop(); 480 481 // Print GC/heap related information. 482 Log(gc, heap, exit) log; 483 if (log.is_info()) { 484 ResourceMark rm; 485 Universe::print_on(log.info_stream()); 486 if (log.is_trace()) { 487 ClassLoaderDataGraph::dump_on(log.trace_stream()); 488 } 489 } 490 491 #if INCLUDE_ALL_GCS 492 AdaptiveSizePolicyOutput::print(); 493 #endif 494 495 if (PrintBytecodeHistogram) { 496 BytecodeHistogram::print(); 497 } 498 499 if (JvmtiExport::should_post_thread_life()) { 500 JvmtiExport::post_thread_end(thread); 501 } 502 503 // Always call even when there are not JVMTI environments yet, since environments 504 // may be attached late and JVMTI must track phases of VM execution 505 JvmtiExport::post_vm_death(); 506 Threads::shutdown_vm_agents(); 507 508 // Terminate the signal thread 509 // Note: we don't wait until it actually dies. 510 os::terminate_signal_thread(); 511 512 print_statistics(); 513 Universe::heap()->print_tracing_info(); 514 515 { MutexLocker ml(BeforeExit_lock); 516 _before_exit_status = BEFORE_EXIT_DONE; 517 BeforeExit_lock->notify_all(); 518 } 519 520 if (VerifyStringTableAtExit) { 521 int fail_cnt = 0; 522 { 523 MutexLocker ml(StringTable_lock); 524 fail_cnt = StringTable::verify_and_compare_entries(); 525 } 526 527 if (fail_cnt != 0) { 528 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 529 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 530 } 531 } 532 533 #undef BEFORE_EXIT_NOT_RUN 534 #undef BEFORE_EXIT_RUNNING 535 #undef BEFORE_EXIT_DONE 536 } 537 538 void vm_exit(int code) { 539 Thread* thread = 540 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL; 541 if (thread == NULL) { 542 // very early initialization failure -- just exit 543 vm_direct_exit(code); 544 } 545 546 if (VMThread::vm_thread() != NULL) { 547 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 548 VM_Exit op(code); 549 if (thread->is_Java_thread()) 550 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 551 VMThread::execute(&op); 552 // should never reach here; but in case something wrong with VM Thread. 553 vm_direct_exit(code); 554 } else { 555 // VM thread is gone, just exit 556 vm_direct_exit(code); 557 } 558 ShouldNotReachHere(); 559 } 560 561 void notify_vm_shutdown() { 562 // For now, just a dtrace probe. 563 HOTSPOT_VM_SHUTDOWN(); 564 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 565 } 566 567 void vm_direct_exit(int code) { 568 notify_vm_shutdown(); 569 os::wait_for_keypress_at_exit(); 570 os::exit(code); 571 } 572 573 void vm_perform_shutdown_actions() { 574 // Warning: do not call 'exit_globals()' here. All threads are still running. 575 // Calling 'exit_globals()' will disable thread-local-storage and cause all 576 // kinds of assertions to trigger in debug mode. 577 if (is_init_completed()) { 578 Thread* thread = Thread::current_or_null(); 579 if (thread != NULL && thread->is_Java_thread()) { 580 // We are leaving the VM, set state to native (in case any OS exit 581 // handlers call back to the VM) 582 JavaThread* jt = (JavaThread*)thread; 583 // Must always be walkable or have no last_Java_frame when in 584 // thread_in_native 585 jt->frame_anchor()->make_walkable(jt); 586 jt->set_thread_state(_thread_in_native); 587 } 588 } 589 notify_vm_shutdown(); 590 } 591 592 void vm_shutdown() 593 { 594 vm_perform_shutdown_actions(); 595 os::wait_for_keypress_at_exit(); 596 os::shutdown(); 597 } 598 599 void vm_abort(bool dump_core) { 600 vm_perform_shutdown_actions(); 601 os::wait_for_keypress_at_exit(); 602 603 // Flush stdout and stderr before abort. 604 fflush(stdout); 605 fflush(stderr); 606 607 os::abort(dump_core); 608 ShouldNotReachHere(); 609 } 610 611 void vm_notify_during_shutdown(const char* error, const char* message) { 612 if (error != NULL) { 613 tty->print_cr("Error occurred during initialization of VM"); 614 tty->print("%s", error); 615 if (message != NULL) { 616 tty->print_cr(": %s", message); 617 } 618 else { 619 tty->cr(); 620 } 621 } 622 if (ShowMessageBoxOnError && WizardMode) { 623 fatal("Error occurred during initialization of VM"); 624 } 625 } 626 627 void vm_exit_during_initialization() { 628 vm_notify_during_shutdown(NULL, NULL); 629 630 // Failure during initialization, we don't want to dump core 631 vm_abort(false); 632 } 633 634 void vm_exit_during_initialization(Handle exception) { 635 tty->print_cr("Error occurred during initialization of VM"); 636 // If there are exceptions on this thread it must be cleared 637 // first and here. Any future calls to EXCEPTION_MARK requires 638 // that no pending exceptions exist. 639 Thread *THREAD = Thread::current(); // can't be NULL 640 if (HAS_PENDING_EXCEPTION) { 641 CLEAR_PENDING_EXCEPTION; 642 } 643 java_lang_Throwable::print_stack_trace(exception, tty); 644 tty->cr(); 645 vm_notify_during_shutdown(NULL, NULL); 646 647 // Failure during initialization, we don't want to dump core 648 vm_abort(false); 649 } 650 651 void vm_exit_during_initialization(Symbol* ex, const char* message) { 652 ResourceMark rm; 653 vm_notify_during_shutdown(ex->as_C_string(), message); 654 655 // Failure during initialization, we don't want to dump core 656 vm_abort(false); 657 } 658 659 void vm_exit_during_initialization(const char* error, const char* message) { 660 vm_notify_during_shutdown(error, message); 661 662 // Failure during initialization, we don't want to dump core 663 vm_abort(false); 664 } 665 666 void vm_shutdown_during_initialization(const char* error, const char* message) { 667 vm_notify_during_shutdown(error, message); 668 vm_shutdown(); 669 } 670 671 JDK_Version JDK_Version::_current; 672 const char* JDK_Version::_runtime_name; 673 const char* JDK_Version::_runtime_version; 674 675 void JDK_Version::initialize() { 676 jdk_version_info info; 677 assert(!_current.is_valid(), "Don't initialize twice"); 678 679 void *lib_handle = os::native_java_library(); 680 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 681 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 682 683 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223"); 684 685 (*func)(&info, sizeof(info)); 686 687 int major = JDK_VERSION_MAJOR(info.jdk_version); 688 int minor = JDK_VERSION_MINOR(info.jdk_version); 689 int security = JDK_VERSION_SECURITY(info.jdk_version); 690 int build = JDK_VERSION_BUILD(info.jdk_version); 691 692 // Incompatible with pre-4243978 JDK. 693 if (info.pending_list_uses_discovered_field == 0) { 694 vm_exit_during_initialization( 695 "Incompatible JDK is not using Reference.discovered field for pending list"); 696 } 697 _current = JDK_Version(major, minor, security, info.patch_version, build, 698 info.thread_park_blocker == 1, 699 info.post_vm_init_hook_enabled == 1); 700 } 701 702 void JDK_Version_init() { 703 JDK_Version::initialize(); 704 } 705 706 static int64_t encode_jdk_version(const JDK_Version& v) { 707 return 708 ((int64_t)v.major_version() << (BitsPerByte * 4)) | 709 ((int64_t)v.minor_version() << (BitsPerByte * 3)) | 710 ((int64_t)v.security_version() << (BitsPerByte * 2)) | 711 ((int64_t)v.patch_version() << (BitsPerByte * 1)) | 712 ((int64_t)v.build_number() << (BitsPerByte * 0)); 713 } 714 715 int JDK_Version::compare(const JDK_Version& other) const { 716 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 717 uint64_t e = encode_jdk_version(*this); 718 uint64_t o = encode_jdk_version(other); 719 return (e > o) ? 1 : ((e == o) ? 0 : -1); 720 } 721 722 void JDK_Version::to_string(char* buffer, size_t buflen) const { 723 assert(buffer && buflen > 0, "call with useful buffer"); 724 size_t index = 0; 725 726 if (!is_valid()) { 727 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 728 } else { 729 int rc = jio_snprintf( 730 &buffer[index], buflen - index, "%d.%d", _major, _minor); 731 if (rc == -1) return; 732 index += rc; 733 if (_security > 0) { 734 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security); 735 if (rc == -1) return; 736 index += rc; 737 } 738 if (_patch > 0) { 739 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch); 740 if (rc == -1) return; 741 index += rc; 742 } 743 if (_build > 0) { 744 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build); 745 if (rc == -1) return; 746 index += rc; 747 } 748 } 749 }