1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "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 #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 // This HandleMark prevents a huge amount of handles from being added 103 // to the metadata_handles() array on the thread. 104 HandleMark hm(thread); 105 methodHandle mh(thread, m); 106 if ((m->method_data() != NULL) && 107 (PrintMethodData || CompilerOracle::should_print(mh))) { 108 collected_profiled_methods->push(m); 109 } 110 } 111 112 void print_method_profiling_data() { 113 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) && 114 (PrintMethodData || CompilerOracle::should_print_methods())) { 115 ResourceMark rm; 116 HandleMark hm; 117 collected_profiled_methods = new GrowableArray<Method*>(1024); 118 ClassLoaderDataGraph::methods_do(collect_profiled_methods); 119 collected_profiled_methods->sort(&compare_methods); 120 121 int count = collected_profiled_methods->length(); 122 int total_size = 0; 123 if (count > 0) { 124 for (int index = 0; index < count; index++) { 125 Method* m = collected_profiled_methods->at(index); 126 ttyLocker ttyl; 127 tty->print_cr("------------------------------------------------------------------------"); 128 m->print_invocation_count(); 129 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 130 tty->cr(); 131 // Dump data on parameters if any 132 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 133 tty->fill_to(2); 134 m->method_data()->parameters_type_data()->print_data_on(tty); 135 } 136 m->print_codes(); 137 total_size += m->method_data()->size_in_bytes(); 138 } 139 tty->print_cr("------------------------------------------------------------------------"); 140 tty->print_cr("Total MDO size: %d bytes", total_size); 141 } 142 } 143 } 144 145 146 #ifndef PRODUCT 147 148 // Statistics printing (method invocation histogram) 149 150 GrowableArray<Method*>* collected_invoked_methods; 151 152 void collect_invoked_methods(Method* m) { 153 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 154 collected_invoked_methods->push(m); 155 } 156 } 157 158 159 160 161 void print_method_invocation_histogram() { 162 ResourceMark rm; 163 HandleMark hm; 164 collected_invoked_methods = new GrowableArray<Method*>(1024); 165 SystemDictionary::methods_do(collect_invoked_methods); 166 collected_invoked_methods->sort(&compare_methods); 167 // 168 tty->cr(); 169 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff); 170 tty->cr(); 171 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 172 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 173 synch_total = 0, nativ_total = 0, acces_total = 0; 174 for (int index = 0; index < collected_invoked_methods->length(); index++) { 175 Method* m = collected_invoked_methods->at(index); 176 int c = m->invocation_count() + m->compiled_invocation_count(); 177 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 178 int_total += m->invocation_count(); 179 comp_total += m->compiled_invocation_count(); 180 if (m->is_final()) final_total += c; 181 if (m->is_static()) static_total += c; 182 if (m->is_synchronized()) synch_total += c; 183 if (m->is_native()) nativ_total += c; 184 if (m->is_accessor()) acces_total += c; 185 } 186 tty->cr(); 187 total = int_total + comp_total; 188 tty->print_cr("Invocations summary:"); 189 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 190 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 191 tty->print_cr("\t%9d (100%%) total", total); 192 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 193 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 194 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 195 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 196 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 197 tty->cr(); 198 SharedRuntime::print_call_statistics(comp_total); 199 } 200 201 void print_bytecode_count() { 202 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 203 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 204 } 205 } 206 207 AllocStats alloc_stats; 208 209 210 211 // General statistics printing (profiling ...) 212 void print_statistics() { 213 #ifdef ASSERT 214 215 if (CountRuntimeCalls) { 216 extern Histogram *RuntimeHistogram; 217 RuntimeHistogram->print(); 218 } 219 220 if (CountJNICalls) { 221 extern Histogram *JNIHistogram; 222 JNIHistogram->print(); 223 } 224 225 if (CountJVMCalls) { 226 extern Histogram *JVMHistogram; 227 JVMHistogram->print(); 228 } 229 230 #endif 231 232 if (MemProfiling) { 233 MemProfiler::disengage(); 234 } 235 236 if (CITime) { 237 CompileBroker::print_times(); 238 } 239 240 #ifdef COMPILER1 241 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 242 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 243 Runtime1::print_statistics(); 244 Deoptimization::print_statistics(); 245 SharedRuntime::print_statistics(); 246 } 247 #endif /* COMPILER1 */ 248 249 #ifdef COMPILER2 250 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 251 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 252 Compile::print_statistics(); 253 #ifndef COMPILER1 254 Deoptimization::print_statistics(); 255 SharedRuntime::print_statistics(); 256 #endif //COMPILER1 257 os::print_statistics(); 258 } 259 260 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 261 OptoRuntime::print_named_counters(); 262 } 263 264 if (TimeLivenessAnalysis) { 265 MethodLiveness::print_times(); 266 } 267 #ifdef ASSERT 268 if (CollectIndexSetStatistics) { 269 IndexSet::print_statistics(); 270 } 271 #endif // ASSERT 272 #else 273 #ifdef INCLUDE_JVMCI 274 #ifndef COMPILER1 275 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) { 276 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization); 277 Deoptimization::print_statistics(); 278 SharedRuntime::print_statistics(); 279 } 280 #endif 281 #endif 282 #endif 283 284 if (PrintAOTStatistics) { 285 AOTLoader::print_statistics(); 286 } 287 288 if (PrintNMethodStatistics) { 289 nmethod::print_statistics(); 290 } 291 if (CountCompiledCalls) { 292 print_method_invocation_histogram(); 293 } 294 295 print_method_profiling_data(); 296 297 if (TimeCompilationPolicy) { 298 CompilationPolicy::policy()->print_time(); 299 } 300 if (TimeOopMap) { 301 GenerateOopMap::print_time(); 302 } 303 if (ProfilerCheckIntervals) { 304 PeriodicTask::print_intervals(); 305 } 306 if (PrintSymbolTableSizeHistogram) { 307 SymbolTable::print_histogram(); 308 } 309 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 310 BytecodeCounter::print(); 311 } 312 if (PrintBytecodePairHistogram) { 313 BytecodePairHistogram::print(); 314 } 315 316 if (PrintCodeCache) { 317 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 318 CodeCache::print(); 319 } 320 321 if (PrintMethodFlushingStatistics) { 322 NMethodSweeper::print(); 323 } 324 325 if (PrintCodeCache2) { 326 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 327 CodeCache::print_internals(); 328 } 329 330 if (PrintVtableStats) { 331 klassVtable::print_statistics(); 332 klassItable::print_statistics(); 333 } 334 if (VerifyOops) { 335 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 336 } 337 338 print_bytecode_count(); 339 if (PrintMallocStatistics) { 340 tty->print("allocation stats: "); 341 alloc_stats.print(); 342 tty->cr(); 343 } 344 345 if (PrintSystemDictionaryAtExit) { 346 SystemDictionary::print(); 347 } 348 349 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 350 Method::print_touched_methods(tty); 351 } 352 353 if (PrintBiasedLockingStatistics) { 354 BiasedLocking::print_counters(); 355 } 356 357 // Native memory tracking data 358 if (PrintNMTStatistics) { 359 MemTracker::final_report(tty); 360 } 361 } 362 363 #else // PRODUCT MODE STATISTICS 364 365 void print_statistics() { 366 367 if (PrintMethodData) { 368 print_method_profiling_data(); 369 } 370 371 if (CITime) { 372 CompileBroker::print_times(); 373 } 374 375 if (PrintCodeCache) { 376 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 377 CodeCache::print(); 378 } 379 380 if (PrintMethodFlushingStatistics) { 381 NMethodSweeper::print(); 382 } 383 384 #ifdef COMPILER2 385 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 386 OptoRuntime::print_named_counters(); 387 } 388 #endif 389 if (PrintBiasedLockingStatistics) { 390 BiasedLocking::print_counters(); 391 } 392 393 // Native memory tracking data 394 if (PrintNMTStatistics) { 395 MemTracker::final_report(tty); 396 } 397 398 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 399 Method::print_touched_methods(tty); 400 } 401 } 402 403 #endif 404 405 // Note: before_exit() can be executed only once, if more than one threads 406 // are trying to shutdown the VM at the same time, only one thread 407 // can run before_exit() and all other threads must wait. 408 void before_exit(JavaThread* thread) { 409 #define BEFORE_EXIT_NOT_RUN 0 410 #define BEFORE_EXIT_RUNNING 1 411 #define BEFORE_EXIT_DONE 2 412 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 413 414 // Note: don't use a Mutex to guard the entire before_exit(), as 415 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 416 // A CAS or OSMutex would work just fine but then we need to manipulate 417 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 418 // for synchronization. 419 { MutexLocker ml(BeforeExit_lock); 420 switch (_before_exit_status) { 421 case BEFORE_EXIT_NOT_RUN: 422 _before_exit_status = BEFORE_EXIT_RUNNING; 423 break; 424 case BEFORE_EXIT_RUNNING: 425 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 426 BeforeExit_lock->wait(); 427 } 428 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 429 return; 430 case BEFORE_EXIT_DONE: 431 // need block to avoid SS compiler bug 432 { 433 return; 434 } 435 } 436 } 437 438 #if INCLUDE_JVMCI 439 // We are not using CATCH here because we want the exit to continue normally. 440 Thread* THREAD = thread; 441 JVMCIRuntime::shutdown(THREAD); 442 if (HAS_PENDING_EXCEPTION) { 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 && 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 AdaptiveSizePolicyOutput::print(); 491 492 if (PrintBytecodeHistogram) { 493 BytecodeHistogram::print(); 494 } 495 496 if (JvmtiExport::should_post_thread_life()) { 497 JvmtiExport::post_thread_end(thread); 498 } 499 500 // Always call even when there are not JVMTI environments yet, since environments 501 // may be attached late and JVMTI must track phases of VM execution 502 JvmtiExport::post_vm_death(); 503 Threads::shutdown_vm_agents(); 504 505 // Terminate the signal thread 506 // Note: we don't wait until it actually dies. 507 os::terminate_signal_thread(); 508 509 print_statistics(); 510 Universe::heap()->print_tracing_info(); 511 512 { MutexLocker ml(BeforeExit_lock); 513 _before_exit_status = BEFORE_EXIT_DONE; 514 BeforeExit_lock->notify_all(); 515 } 516 517 if (VerifyStringTableAtExit) { 518 int fail_cnt = 0; 519 { 520 MutexLocker ml(StringTable_lock); 521 fail_cnt = StringTable::verify_and_compare_entries(); 522 } 523 524 if (fail_cnt != 0) { 525 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 526 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 527 } 528 } 529 530 #undef BEFORE_EXIT_NOT_RUN 531 #undef BEFORE_EXIT_RUNNING 532 #undef BEFORE_EXIT_DONE 533 } 534 535 void vm_exit(int code) { 536 Thread* thread = 537 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL; 538 if (thread == NULL) { 539 // very early initialization failure -- just exit 540 vm_direct_exit(code); 541 } 542 543 if (VMThread::vm_thread() != NULL) { 544 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 545 VM_Exit op(code); 546 if (thread->is_Java_thread()) 547 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 548 VMThread::execute(&op); 549 // should never reach here; but in case something wrong with VM Thread. 550 vm_direct_exit(code); 551 } else { 552 // VM thread is gone, just exit 553 vm_direct_exit(code); 554 } 555 ShouldNotReachHere(); 556 } 557 558 void notify_vm_shutdown() { 559 // For now, just a dtrace probe. 560 HOTSPOT_VM_SHUTDOWN(); 561 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 562 } 563 564 void vm_direct_exit(int code) { 565 notify_vm_shutdown(); 566 os::wait_for_keypress_at_exit(); 567 os::exit(code); 568 } 569 570 void vm_perform_shutdown_actions() { 571 // Warning: do not call 'exit_globals()' here. All threads are still running. 572 // Calling 'exit_globals()' will disable thread-local-storage and cause all 573 // kinds of assertions to trigger in debug mode. 574 if (is_init_completed()) { 575 Thread* thread = Thread::current_or_null(); 576 if (thread != NULL && thread->is_Java_thread()) { 577 // We are leaving the VM, set state to native (in case any OS exit 578 // handlers call back to the VM) 579 JavaThread* jt = (JavaThread*)thread; 580 // Must always be walkable or have no last_Java_frame when in 581 // thread_in_native 582 jt->frame_anchor()->make_walkable(jt); 583 jt->set_thread_state(_thread_in_native); 584 } 585 } 586 notify_vm_shutdown(); 587 } 588 589 void vm_shutdown() 590 { 591 vm_perform_shutdown_actions(); 592 os::wait_for_keypress_at_exit(); 593 os::shutdown(); 594 } 595 596 void vm_abort(bool dump_core) { 597 vm_perform_shutdown_actions(); 598 os::wait_for_keypress_at_exit(); 599 600 // Flush stdout and stderr before abort. 601 fflush(stdout); 602 fflush(stderr); 603 604 os::abort(dump_core); 605 ShouldNotReachHere(); 606 } 607 608 void vm_notify_during_shutdown(const char* error, const char* message) { 609 if (error != NULL) { 610 tty->print_cr("Error occurred during initialization of VM"); 611 tty->print("%s", error); 612 if (message != NULL) { 613 tty->print_cr(": %s", message); 614 } 615 else { 616 tty->cr(); 617 } 618 } 619 if (ShowMessageBoxOnError && WizardMode) { 620 fatal("Error occurred during initialization of VM"); 621 } 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 } 726 if (_patch > 0) { 727 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch); 728 if (rc == -1) return; 729 index += rc; 730 } 731 if (_build > 0) { 732 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build); 733 if (rc == -1) return; 734 index += rc; 735 } 736 } 737 }