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/jvmtiExport.hpp" 52 #include "runtime/arguments.hpp" 53 #include "runtime/biasedLocking.hpp" 54 #include "runtime/compilationPolicy.hpp" 55 #include "runtime/deoptimization.hpp" 56 #include "runtime/fprofiler.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 #ifdef COMPILER1 77 #include "c1/c1_Compiler.hpp" 78 #include "c1/c1_Runtime1.hpp" 79 #endif 80 #ifdef COMPILER2 81 #include "code/compiledIC.hpp" 82 #include "compiler/methodLiveness.hpp" 83 #include "opto/compile.hpp" 84 #include "opto/indexSet.hpp" 85 #include "opto/runtime.hpp" 86 #endif 87 88 GrowableArray<Method*>* collected_profiled_methods; 89 90 int compare_methods(Method** a, Method** b) { 91 // %%% there can be 32-bit overflow here 92 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 93 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 94 } 95 96 void collect_profiled_methods(Method* m) { 97 Thread* thread = Thread::current(); 98 methodHandle mh(thread, m); 99 if ((m->method_data() != NULL) && 100 (PrintMethodData || CompilerOracle::should_print(mh))) { 101 collected_profiled_methods->push(m); 102 } 103 } 104 105 void print_method_profiling_data() { 106 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) && 107 (PrintMethodData || CompilerOracle::should_print_methods())) { 108 ResourceMark rm; 109 HandleMark hm; 110 collected_profiled_methods = new GrowableArray<Method*>(1024); 111 SystemDictionary::methods_do(collect_profiled_methods); 112 collected_profiled_methods->sort(&compare_methods); 113 114 int count = collected_profiled_methods->length(); 115 int total_size = 0; 116 if (count > 0) { 117 for (int index = 0; index < count; index++) { 118 Method* m = collected_profiled_methods->at(index); 119 ttyLocker ttyl; 120 tty->print_cr("------------------------------------------------------------------------"); 121 m->print_invocation_count(); 122 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 123 tty->cr(); 124 // Dump data on parameters if any 125 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 126 tty->fill_to(2); 127 m->method_data()->parameters_type_data()->print_data_on(tty); 128 } 129 m->print_codes(); 130 total_size += m->method_data()->size_in_bytes(); 131 } 132 tty->print_cr("------------------------------------------------------------------------"); 133 tty->print_cr("Total MDO size: %d bytes", total_size); 134 } 135 } 136 } 137 138 139 #ifndef PRODUCT 140 141 // Statistics printing (method invocation histogram) 142 143 GrowableArray<Method*>* collected_invoked_methods; 144 145 void collect_invoked_methods(Method* m) { 146 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 147 collected_invoked_methods->push(m); 148 } 149 } 150 151 152 153 154 void print_method_invocation_histogram() { 155 ResourceMark rm; 156 HandleMark hm; 157 collected_invoked_methods = new GrowableArray<Method*>(1024); 158 SystemDictionary::methods_do(collect_invoked_methods); 159 collected_invoked_methods->sort(&compare_methods); 160 // 161 tty->cr(); 162 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff); 163 tty->cr(); 164 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 165 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 166 synch_total = 0, nativ_total = 0, acces_total = 0; 167 for (int index = 0; index < collected_invoked_methods->length(); index++) { 168 Method* m = collected_invoked_methods->at(index); 169 int c = m->invocation_count() + m->compiled_invocation_count(); 170 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 171 int_total += m->invocation_count(); 172 comp_total += m->compiled_invocation_count(); 173 if (m->is_final()) final_total += c; 174 if (m->is_static()) static_total += c; 175 if (m->is_synchronized()) synch_total += c; 176 if (m->is_native()) nativ_total += c; 177 if (m->is_accessor()) acces_total += c; 178 } 179 tty->cr(); 180 total = int_total + comp_total; 181 tty->print_cr("Invocations summary:"); 182 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 183 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 184 tty->print_cr("\t%9d (100%%) total", total); 185 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 186 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 187 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 188 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 189 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 190 tty->cr(); 191 SharedRuntime::print_call_statistics(comp_total); 192 } 193 194 void print_bytecode_count() { 195 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 196 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 197 } 198 } 199 200 AllocStats alloc_stats; 201 202 203 204 // General statistics printing (profiling ...) 205 void print_statistics() { 206 #ifdef ASSERT 207 208 if (CountRuntimeCalls) { 209 extern Histogram *RuntimeHistogram; 210 RuntimeHistogram->print(); 211 } 212 213 if (CountJNICalls) { 214 extern Histogram *JNIHistogram; 215 JNIHistogram->print(); 216 } 217 218 if (CountJVMCalls) { 219 extern Histogram *JVMHistogram; 220 JVMHistogram->print(); 221 } 222 223 #endif 224 225 if (MemProfiling) { 226 MemProfiler::disengage(); 227 } 228 229 if (CITime) { 230 CompileBroker::print_times(); 231 } 232 233 #ifdef COMPILER1 234 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 235 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 236 Runtime1::print_statistics(); 237 Deoptimization::print_statistics(); 238 SharedRuntime::print_statistics(); 239 } 240 #endif /* COMPILER1 */ 241 242 #ifdef COMPILER2 243 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 244 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 245 Compile::print_statistics(); 246 #ifndef COMPILER1 247 Deoptimization::print_statistics(); 248 SharedRuntime::print_statistics(); 249 #endif //COMPILER1 250 os::print_statistics(); 251 } 252 253 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 254 OptoRuntime::print_named_counters(); 255 } 256 257 if (TimeLivenessAnalysis) { 258 MethodLiveness::print_times(); 259 } 260 #ifdef ASSERT 261 if (CollectIndexSetStatistics) { 262 IndexSet::print_statistics(); 263 } 264 #endif // ASSERT 265 #else 266 #ifdef INCLUDE_JVMCI 267 #ifndef COMPILER1 268 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) { 269 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization); 270 Deoptimization::print_statistics(); 271 SharedRuntime::print_statistics(); 272 } 273 #endif 274 #endif 275 #endif 276 277 if (PrintAOTStatistics) { 278 AOTLoader::print_statistics(); 279 } 280 281 if (PrintNMethodStatistics) { 282 nmethod::print_statistics(); 283 } 284 if (CountCompiledCalls) { 285 print_method_invocation_histogram(); 286 } 287 288 print_method_profiling_data(); 289 290 if (TimeCompilationPolicy) { 291 CompilationPolicy::policy()->print_time(); 292 } 293 if (TimeOopMap) { 294 GenerateOopMap::print_time(); 295 } 296 if (ProfilerCheckIntervals) { 297 PeriodicTask::print_intervals(); 298 } 299 if (PrintSymbolTableSizeHistogram) { 300 SymbolTable::print_histogram(); 301 } 302 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 303 BytecodeCounter::print(); 304 } 305 if (PrintBytecodePairHistogram) { 306 BytecodePairHistogram::print(); 307 } 308 309 if (PrintCodeCache) { 310 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 311 CodeCache::print(); 312 } 313 314 if (PrintMethodFlushingStatistics) { 315 NMethodSweeper::print(); 316 } 317 318 if (PrintCodeCache2) { 319 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 320 CodeCache::print_internals(); 321 } 322 323 if (PrintVtableStats) { 324 klassVtable::print_statistics(); 325 klassItable::print_statistics(); 326 } 327 if (VerifyOops) { 328 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 329 } 330 331 print_bytecode_count(); 332 if (PrintMallocStatistics) { 333 tty->print("allocation stats: "); 334 alloc_stats.print(); 335 tty->cr(); 336 } 337 338 if (PrintSystemDictionaryAtExit) { 339 SystemDictionary::print(); 340 } 341 342 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 343 Method::print_touched_methods(tty); 344 } 345 346 if (PrintBiasedLockingStatistics) { 347 BiasedLocking::print_counters(); 348 } 349 350 // Native memory tracking data 351 if (PrintNMTStatistics) { 352 MemTracker::final_report(tty); 353 } 354 } 355 356 #else // PRODUCT MODE STATISTICS 357 358 void print_statistics() { 359 360 if (PrintMethodData) { 361 print_method_profiling_data(); 362 } 363 364 if (CITime) { 365 CompileBroker::print_times(); 366 } 367 368 if (PrintCodeCache) { 369 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 370 CodeCache::print(); 371 } 372 373 if (PrintMethodFlushingStatistics) { 374 NMethodSweeper::print(); 375 } 376 377 #ifdef COMPILER2 378 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 379 OptoRuntime::print_named_counters(); 380 } 381 #endif 382 if (PrintBiasedLockingStatistics) { 383 BiasedLocking::print_counters(); 384 } 385 386 // Native memory tracking data 387 if (PrintNMTStatistics) { 388 MemTracker::final_report(tty); 389 } 390 391 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 392 Method::print_touched_methods(tty); 393 } 394 } 395 396 #endif 397 398 // Note: before_exit() can be executed only once, if more than one threads 399 // are trying to shutdown the VM at the same time, only one thread 400 // can run before_exit() and all other threads must wait. 401 void before_exit(JavaThread* thread) { 402 #define BEFORE_EXIT_NOT_RUN 0 403 #define BEFORE_EXIT_RUNNING 1 404 #define BEFORE_EXIT_DONE 2 405 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 406 407 // Note: don't use a Mutex to guard the entire before_exit(), as 408 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 409 // A CAS or OSMutex would work just fine but then we need to manipulate 410 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 411 // for synchronization. 412 { MutexLocker ml(BeforeExit_lock); 413 switch (_before_exit_status) { 414 case BEFORE_EXIT_NOT_RUN: 415 _before_exit_status = BEFORE_EXIT_RUNNING; 416 break; 417 case BEFORE_EXIT_RUNNING: 418 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 419 BeforeExit_lock->wait(); 420 } 421 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 422 return; 423 case BEFORE_EXIT_DONE: 424 // need block to avoid SS compiler bug 425 { 426 return; 427 } 428 } 429 } 430 431 #if INCLUDE_JVMCI 432 // We are not using CATCH here because we want the exit to continue normally. 433 Thread* THREAD = thread; 434 JVMCIRuntime::shutdown(THREAD); 435 if (HAS_PENDING_EXCEPTION) { 436 Handle exception(THREAD, PENDING_EXCEPTION); 437 CLEAR_PENDING_EXCEPTION; 438 java_lang_Throwable::java_printStackTrace(exception, THREAD); 439 } 440 #endif 441 442 // Hang forever on exit if we're reporting an error. 443 if (ShowMessageBoxOnError && is_error_reported()) { 444 os::infinite_sleep(); 445 } 446 447 EventThreadEnd event; 448 if (event.should_commit()) { 449 event.set_thread(THREAD_TRACE_ID(thread)); 450 event.commit(); 451 } 452 453 TRACE_VM_EXIT(); 454 455 // Stop the WatcherThread. We do this before disenrolling various 456 // PeriodicTasks to reduce the likelihood of races. 457 if (PeriodicTask::num_tasks() > 0) { 458 WatcherThread::stop(); 459 } 460 461 // Print statistics gathered (profiling ...) 462 if (Arguments::has_profile()) { 463 FlatProfiler::disengage(); 464 FlatProfiler::print(10); 465 } 466 467 // shut down the StatSampler task 468 StatSampler::disengage(); 469 StatSampler::destroy(); 470 471 // Stop concurrent GC threads 472 Universe::heap()->stop(); 473 474 // Print GC/heap related information. 475 Log(gc, heap, exit) log; 476 if (log.is_info()) { 477 ResourceMark rm; 478 Universe::print_on(log.info_stream()); 479 if (log.is_trace()) { 480 ClassLoaderDataGraph::dump_on(log.trace_stream()); 481 } 482 } 483 AdaptiveSizePolicyOutput::print(); 484 485 if (PrintBytecodeHistogram) { 486 BytecodeHistogram::print(); 487 } 488 489 if (JvmtiExport::should_post_thread_life()) { 490 JvmtiExport::post_thread_end(thread); 491 } 492 493 // Always call even when there are not JVMTI environments yet, since environments 494 // may be attached late and JVMTI must track phases of VM execution 495 JvmtiExport::post_vm_death(); 496 Threads::shutdown_vm_agents(); 497 498 // Terminate the signal thread 499 // Note: we don't wait until it actually dies. 500 os::terminate_signal_thread(); 501 502 print_statistics(); 503 Universe::heap()->print_tracing_info(); 504 505 { MutexLocker ml(BeforeExit_lock); 506 _before_exit_status = BEFORE_EXIT_DONE; 507 BeforeExit_lock->notify_all(); 508 } 509 510 if (VerifyStringTableAtExit) { 511 int fail_cnt = 0; 512 { 513 MutexLocker ml(StringTable_lock); 514 fail_cnt = StringTable::verify_and_compare_entries(); 515 } 516 517 if (fail_cnt != 0) { 518 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 519 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 520 } 521 } 522 523 #undef BEFORE_EXIT_NOT_RUN 524 #undef BEFORE_EXIT_RUNNING 525 #undef BEFORE_EXIT_DONE 526 } 527 528 void vm_exit(int code) { 529 Thread* thread = 530 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL; 531 if (thread == NULL) { 532 // very early initialization failure -- just exit 533 vm_direct_exit(code); 534 } 535 536 if (VMThread::vm_thread() != NULL) { 537 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 538 VM_Exit op(code); 539 if (thread->is_Java_thread()) 540 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 541 VMThread::execute(&op); 542 // should never reach here; but in case something wrong with VM Thread. 543 vm_direct_exit(code); 544 } else { 545 // VM thread is gone, just exit 546 vm_direct_exit(code); 547 } 548 ShouldNotReachHere(); 549 } 550 551 void notify_vm_shutdown() { 552 // For now, just a dtrace probe. 553 HOTSPOT_VM_SHUTDOWN(); 554 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 555 } 556 557 void vm_direct_exit(int code) { 558 notify_vm_shutdown(); 559 os::wait_for_keypress_at_exit(); 560 os::exit(code); 561 } 562 563 void vm_perform_shutdown_actions() { 564 // Warning: do not call 'exit_globals()' here. All threads are still running. 565 // Calling 'exit_globals()' will disable thread-local-storage and cause all 566 // kinds of assertions to trigger in debug mode. 567 if (is_init_completed()) { 568 Thread* thread = Thread::current_or_null(); 569 if (thread != NULL && thread->is_Java_thread()) { 570 // We are leaving the VM, set state to native (in case any OS exit 571 // handlers call back to the VM) 572 JavaThread* jt = (JavaThread*)thread; 573 // Must always be walkable or have no last_Java_frame when in 574 // thread_in_native 575 jt->frame_anchor()->make_walkable(jt); 576 jt->set_thread_state(_thread_in_native); 577 } 578 } 579 notify_vm_shutdown(); 580 } 581 582 void vm_shutdown() 583 { 584 vm_perform_shutdown_actions(); 585 os::wait_for_keypress_at_exit(); 586 os::shutdown(); 587 } 588 589 void vm_abort(bool dump_core) { 590 vm_perform_shutdown_actions(); 591 os::wait_for_keypress_at_exit(); 592 593 // Flush stdout and stderr before abort. 594 fflush(stdout); 595 fflush(stderr); 596 597 os::abort(dump_core); 598 ShouldNotReachHere(); 599 } 600 601 void vm_notify_during_shutdown(const char* error, const char* message) { 602 if (error != NULL) { 603 tty->print_cr("Error occurred during initialization of VM"); 604 tty->print("%s", error); 605 if (message != NULL) { 606 tty->print_cr(": %s", message); 607 } 608 else { 609 tty->cr(); 610 } 611 } 612 if (ShowMessageBoxOnError && WizardMode) { 613 fatal("Error occurred during initialization of VM"); 614 } 615 } 616 617 void vm_exit_during_initialization() { 618 vm_notify_during_shutdown(NULL, NULL); 619 620 // Failure during initialization, we don't want to dump core 621 vm_abort(false); 622 } 623 624 void vm_exit_during_initialization(Handle exception) { 625 tty->print_cr("Error occurred during initialization of VM"); 626 // If there are exceptions on this thread it must be cleared 627 // first and here. Any future calls to EXCEPTION_MARK requires 628 // that no pending exceptions exist. 629 Thread *THREAD = Thread::current(); // can't be NULL 630 if (HAS_PENDING_EXCEPTION) { 631 CLEAR_PENDING_EXCEPTION; 632 } 633 java_lang_Throwable::print_stack_trace(exception, tty); 634 tty->cr(); 635 vm_notify_during_shutdown(NULL, NULL); 636 637 // Failure during initialization, we don't want to dump core 638 vm_abort(false); 639 } 640 641 void vm_exit_during_initialization(Symbol* ex, const char* message) { 642 ResourceMark rm; 643 vm_notify_during_shutdown(ex->as_C_string(), message); 644 645 // Failure during initialization, we don't want to dump core 646 vm_abort(false); 647 } 648 649 void vm_exit_during_initialization(const char* error, const char* message) { 650 vm_notify_during_shutdown(error, message); 651 652 // Failure during initialization, we don't want to dump core 653 vm_abort(false); 654 } 655 656 void vm_shutdown_during_initialization(const char* error, const char* message) { 657 vm_notify_during_shutdown(error, message); 658 vm_shutdown(); 659 } 660 661 JDK_Version JDK_Version::_current; 662 const char* JDK_Version::_runtime_name; 663 const char* JDK_Version::_runtime_version; 664 665 void JDK_Version::initialize() { 666 jdk_version_info info; 667 assert(!_current.is_valid(), "Don't initialize twice"); 668 669 void *lib_handle = os::native_java_library(); 670 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 671 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 672 673 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223"); 674 675 (*func)(&info, sizeof(info)); 676 677 int major = JDK_VERSION_MAJOR(info.jdk_version); 678 int minor = JDK_VERSION_MINOR(info.jdk_version); 679 int security = JDK_VERSION_SECURITY(info.jdk_version); 680 int build = JDK_VERSION_BUILD(info.jdk_version); 681 682 // Incompatible with pre-4243978 JDK. 683 if (info.pending_list_uses_discovered_field == 0) { 684 vm_exit_during_initialization( 685 "Incompatible JDK is not using Reference.discovered field for pending list"); 686 } 687 _current = JDK_Version(major, minor, security, info.patch_version, build, 688 info.thread_park_blocker == 1, 689 info.post_vm_init_hook_enabled == 1); 690 } 691 692 void JDK_Version_init() { 693 JDK_Version::initialize(); 694 } 695 696 static int64_t encode_jdk_version(const JDK_Version& v) { 697 return 698 ((int64_t)v.major_version() << (BitsPerByte * 4)) | 699 ((int64_t)v.minor_version() << (BitsPerByte * 3)) | 700 ((int64_t)v.security_version() << (BitsPerByte * 2)) | 701 ((int64_t)v.patch_version() << (BitsPerByte * 1)) | 702 ((int64_t)v.build_number() << (BitsPerByte * 0)); 703 } 704 705 int JDK_Version::compare(const JDK_Version& other) const { 706 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 707 uint64_t e = encode_jdk_version(*this); 708 uint64_t o = encode_jdk_version(other); 709 return (e > o) ? 1 : ((e == o) ? 0 : -1); 710 } 711 712 void JDK_Version::to_string(char* buffer, size_t buflen) const { 713 assert(buffer && buflen > 0, "call with useful buffer"); 714 size_t index = 0; 715 716 if (!is_valid()) { 717 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 718 } else { 719 int rc = jio_snprintf( 720 &buffer[index], buflen - index, "%d.%d", _major, _minor); 721 if (rc == -1) return; 722 index += rc; 723 if (_security > 0) { 724 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security); 725 if (rc == -1) return; 726 index += rc; 727 } 728 if (_patch > 0) { 729 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch); 730 if (rc == -1) return; 731 index += rc; 732 } 733 if (_build > 0) { 734 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build); 735 if (rc == -1) return; 736 index += rc; 737 } 738 } 739 }