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