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 "classfile/classLoader.hpp" 27 #include "classfile/stringTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "code/codeCache.hpp" 30 #include "compiler/compileBroker.hpp" 31 #include "compiler/compilerOracle.hpp" 32 #include "gc/shared/genCollectedHeap.hpp" 33 #include "interpreter/bytecodeHistogram.hpp" 34 #if INCLUDE_JVMCI 35 #include "jvmci/jvmciCompiler.hpp" 36 #include "jvmci/jvmciRuntime.hpp" 37 #endif 38 #include "logging/log.hpp" 39 #include "memory/oopFactory.hpp" 40 #include "memory/resourceArea.hpp" 41 #include "memory/universe.hpp" 42 #include "oops/constantPool.hpp" 43 #include "oops/generateOopMap.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceOop.hpp" 46 #include "oops/method.hpp" 47 #include "oops/objArrayOop.hpp" 48 #include "oops/oop.inline.hpp" 49 #include "oops/symbol.hpp" 50 #include "prims/jvmtiExport.hpp" 51 #include "runtime/arguments.hpp" 52 #include "runtime/biasedLocking.hpp" 53 #include "runtime/compilationPolicy.hpp" 54 #include "runtime/deoptimization.hpp" 55 #include "runtime/fprofiler.hpp" 56 #include "runtime/init.hpp" 57 #include "runtime/interfaceSupport.hpp" 58 #include "runtime/java.hpp" 59 #include "runtime/memprofiler.hpp" 60 #include "runtime/sharedRuntime.hpp" 61 #include "runtime/statSampler.hpp" 62 #include "runtime/sweeper.hpp" 63 #include "runtime/task.hpp" 64 #include "runtime/thread.inline.hpp" 65 #include "runtime/timer.hpp" 66 #include "runtime/vm_operations.hpp" 67 #include "services/memTracker.hpp" 68 #include "trace/traceMacros.hpp" 69 #include "trace/tracing.hpp" 70 #include "utilities/dtrace.hpp" 71 #include "utilities/globalDefinitions.hpp" 72 #include "utilities/histogram.hpp" 73 #include "utilities/macros.hpp" 74 #include "utilities/vmError.hpp" 75 #ifdef COMPILER1 76 #include "c1/c1_Compiler.hpp" 77 #include "c1/c1_Runtime1.hpp" 78 #endif 79 #ifdef COMPILER2 80 #include "code/compiledIC.hpp" 81 #include "compiler/methodLiveness.hpp" 82 #include "opto/compile.hpp" 83 #include "opto/indexSet.hpp" 84 #include "opto/runtime.hpp" 85 #endif 86 87 GrowableArray<Method*>* collected_profiled_methods; 88 89 int compare_methods(Method** a, Method** b) { 90 // %%% there can be 32-bit overflow here 91 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 92 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 93 } 94 95 void collect_profiled_methods(Method* m) { 96 Thread* thread = Thread::current(); 97 // This HandleMark prevents a huge amount of handles from being added 98 // to the metadata_handles() array on the thread. 99 HandleMark hm(thread); 100 methodHandle mh(thread, m); 101 if ((m->method_data() != NULL) && 102 (PrintMethodData || CompilerOracle::should_print(mh))) { 103 collected_profiled_methods->push(m); 104 } 105 } 106 107 void print_method_profiling_data() { 108 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) && 109 (PrintMethodData || CompilerOracle::should_print_methods())) { 110 ResourceMark rm; 111 HandleMark hm; 112 collected_profiled_methods = new GrowableArray<Method*>(1024); 113 ClassLoaderDataGraph::methods_do(collect_profiled_methods); 114 collected_profiled_methods->sort(&compare_methods); 115 116 int count = collected_profiled_methods->length(); 117 int total_size = 0; 118 if (count > 0) { 119 for (int index = 0; index < count; index++) { 120 Method* m = collected_profiled_methods->at(index); 121 ttyLocker ttyl; 122 tty->print_cr("------------------------------------------------------------------------"); 123 m->print_invocation_count(); 124 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 125 tty->cr(); 126 // Dump data on parameters if any 127 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 128 tty->fill_to(2); 129 m->method_data()->parameters_type_data()->print_data_on(tty); 130 } 131 m->print_codes(); 132 total_size += m->method_data()->size_in_bytes(); 133 } 134 tty->print_cr("------------------------------------------------------------------------"); 135 tty->print_cr("Total MDO size: %d bytes", total_size); 136 } 137 } 138 } 139 140 141 #ifndef PRODUCT 142 143 // Statistics printing (method invocation histogram) 144 145 GrowableArray<Method*>* collected_invoked_methods; 146 147 void collect_invoked_methods(Method* m) { 148 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 149 collected_invoked_methods->push(m); 150 } 151 } 152 153 154 155 156 void print_method_invocation_histogram() { 157 ResourceMark rm; 158 HandleMark hm; 159 collected_invoked_methods = new GrowableArray<Method*>(1024); 160 SystemDictionary::methods_do(collect_invoked_methods); 161 collected_invoked_methods->sort(&compare_methods); 162 // 163 tty->cr(); 164 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff); 165 tty->cr(); 166 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 167 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 168 synch_total = 0, nativ_total = 0, acces_total = 0; 169 for (int index = 0; index < collected_invoked_methods->length(); index++) { 170 Method* m = collected_invoked_methods->at(index); 171 int c = m->invocation_count() + m->compiled_invocation_count(); 172 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 173 int_total += m->invocation_count(); 174 comp_total += m->compiled_invocation_count(); 175 if (m->is_final()) final_total += c; 176 if (m->is_static()) static_total += c; 177 if (m->is_synchronized()) synch_total += c; 178 if (m->is_native()) nativ_total += c; 179 if (m->is_accessor()) acces_total += c; 180 } 181 tty->cr(); 182 total = int_total + comp_total; 183 tty->print_cr("Invocations summary:"); 184 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 185 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 186 tty->print_cr("\t%9d (100%%) total", total); 187 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 188 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 189 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 190 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 191 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 192 tty->cr(); 193 SharedRuntime::print_call_statistics(comp_total); 194 } 195 196 void print_bytecode_count() { 197 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 198 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 199 } 200 } 201 202 AllocStats alloc_stats; 203 204 205 206 // General statistics printing (profiling ...) 207 void print_statistics() { 208 #ifdef ASSERT 209 210 if (CountRuntimeCalls) { 211 extern Histogram *RuntimeHistogram; 212 RuntimeHistogram->print(); 213 } 214 215 if (CountJNICalls) { 216 extern Histogram *JNIHistogram; 217 JNIHistogram->print(); 218 } 219 220 if (CountJVMCalls) { 221 extern Histogram *JVMHistogram; 222 JVMHistogram->print(); 223 } 224 225 #endif 226 227 if (MemProfiling) { 228 MemProfiler::disengage(); 229 } 230 231 if (CITime) { 232 CompileBroker::print_times(); 233 } 234 235 #ifdef COMPILER1 236 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 237 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 238 Runtime1::print_statistics(); 239 Deoptimization::print_statistics(); 240 SharedRuntime::print_statistics(); 241 } 242 #endif /* COMPILER1 */ 243 244 #ifdef COMPILER2 245 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 246 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 247 Compile::print_statistics(); 248 #ifndef COMPILER1 249 Deoptimization::print_statistics(); 250 SharedRuntime::print_statistics(); 251 #endif //COMPILER1 252 os::print_statistics(); 253 } 254 255 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 256 OptoRuntime::print_named_counters(); 257 } 258 259 if (TimeLivenessAnalysis) { 260 MethodLiveness::print_times(); 261 } 262 #ifdef ASSERT 263 if (CollectIndexSetStatistics) { 264 IndexSet::print_statistics(); 265 } 266 #endif // ASSERT 267 #else 268 #ifdef INCLUDE_JVMCI 269 #ifndef COMPILER1 270 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) { 271 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization); 272 Deoptimization::print_statistics(); 273 SharedRuntime::print_statistics(); 274 } 275 #endif 276 #endif 277 #endif 278 279 if (PrintNMethodStatistics) { 280 nmethod::print_statistics(); 281 } 282 if (CountCompiledCalls) { 283 print_method_invocation_histogram(); 284 } 285 286 print_method_profiling_data(); 287 288 if (TimeCompilationPolicy) { 289 CompilationPolicy::policy()->print_time(); 290 } 291 if (TimeOopMap) { 292 GenerateOopMap::print_time(); 293 } 294 if (ProfilerCheckIntervals) { 295 PeriodicTask::print_intervals(); 296 } 297 if (PrintSymbolTableSizeHistogram) { 298 SymbolTable::print_histogram(); 299 } 300 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 301 BytecodeCounter::print(); 302 } 303 if (PrintBytecodePairHistogram) { 304 BytecodePairHistogram::print(); 305 } 306 307 if (PrintCodeCache) { 308 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 309 CodeCache::print(); 310 } 311 312 if (PrintMethodFlushingStatistics) { 313 NMethodSweeper::print(); 314 } 315 316 if (PrintCodeCache2) { 317 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 318 CodeCache::print_internals(); 319 } 320 321 if (PrintVtableStats) { 322 klassVtable::print_statistics(); 323 klassItable::print_statistics(); 324 } 325 if (VerifyOops) { 326 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 327 } 328 329 print_bytecode_count(); 330 if (PrintMallocStatistics) { 331 tty->print("allocation stats: "); 332 alloc_stats.print(); 333 tty->cr(); 334 } 335 336 if (PrintSystemDictionaryAtExit) { 337 SystemDictionary::print(); 338 } 339 340 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 341 Method::print_touched_methods(tty); 342 } 343 344 if (PrintBiasedLockingStatistics) { 345 BiasedLocking::print_counters(); 346 } 347 348 // Native memory tracking data 349 if (PrintNMTStatistics) { 350 MemTracker::final_report(tty); 351 } 352 } 353 354 #else // PRODUCT MODE STATISTICS 355 356 void print_statistics() { 357 358 if (PrintMethodData) { 359 print_method_profiling_data(); 360 } 361 362 if (CITime) { 363 CompileBroker::print_times(); 364 } 365 366 if (PrintCodeCache) { 367 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 368 CodeCache::print(); 369 } 370 371 if (PrintMethodFlushingStatistics) { 372 NMethodSweeper::print(); 373 } 374 375 #ifdef COMPILER2 376 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 377 OptoRuntime::print_named_counters(); 378 } 379 #endif 380 if (PrintBiasedLockingStatistics) { 381 BiasedLocking::print_counters(); 382 } 383 384 // Native memory tracking data 385 if (PrintNMTStatistics) { 386 MemTracker::final_report(tty); 387 } 388 389 if (LogTouchedMethods && PrintTouchedMethodsAtExit) { 390 Method::print_touched_methods(tty); 391 } 392 } 393 394 #endif 395 396 // Note: before_exit() can be executed only once, if more than one threads 397 // are trying to shutdown the VM at the same time, only one thread 398 // can run before_exit() and all other threads must wait. 399 void before_exit(JavaThread* thread) { 400 #define BEFORE_EXIT_NOT_RUN 0 401 #define BEFORE_EXIT_RUNNING 1 402 #define BEFORE_EXIT_DONE 2 403 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 404 405 // Note: don't use a Mutex to guard the entire before_exit(), as 406 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 407 // A CAS or OSMutex would work just fine but then we need to manipulate 408 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 409 // for synchronization. 410 { MutexLocker ml(BeforeExit_lock); 411 switch (_before_exit_status) { 412 case BEFORE_EXIT_NOT_RUN: 413 _before_exit_status = BEFORE_EXIT_RUNNING; 414 break; 415 case BEFORE_EXIT_RUNNING: 416 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 417 BeforeExit_lock->wait(); 418 } 419 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 420 return; 421 case BEFORE_EXIT_DONE: 422 // need block to avoid SS compiler bug 423 { 424 return; 425 } 426 } 427 } 428 429 #if INCLUDE_JVMCI 430 // We are not using CATCH here because we want the exit to continue normally. 431 Thread* THREAD = thread; 432 JVMCIRuntime::shutdown(THREAD); 433 if (HAS_PENDING_EXCEPTION) { 434 Handle exception(THREAD, PENDING_EXCEPTION); 435 CLEAR_PENDING_EXCEPTION; 436 java_lang_Throwable::java_printStackTrace(exception, THREAD); 437 } 438 #endif 439 440 // Hang forever on exit if we're reporting an error. 441 if (ShowMessageBoxOnError && is_error_reported()) { 442 os::infinite_sleep(); 443 } 444 445 EventThreadEnd event; 446 if (event.should_commit()) { 447 event.set_thread(THREAD_TRACE_ID(thread)); 448 event.commit(); 449 } 450 451 TRACE_VM_EXIT(); 452 453 // Stop the WatcherThread. We do this before disenrolling various 454 // PeriodicTasks to reduce the likelihood of races. 455 if (PeriodicTask::num_tasks() > 0) { 456 WatcherThread::stop(); 457 } 458 459 // Print statistics gathered (profiling ...) 460 if (Arguments::has_profile()) { 461 FlatProfiler::disengage(); 462 FlatProfiler::print(10); 463 } 464 465 // shut down the StatSampler task 466 StatSampler::disengage(); 467 StatSampler::destroy(); 468 469 // Stop concurrent GC threads 470 GC::gc()->heap()->stop(); 471 472 // Print GC/heap related information. 473 Log(gc, heap, exit) log; 474 if (log.is_info()) { 475 ResourceMark rm; 476 Universe::print_on(log.info_stream()); 477 if (log.is_trace()) { 478 ClassLoaderDataGraph::dump_on(log.trace_stream()); 479 } 480 } 481 AdaptiveSizePolicyOutput::print(); 482 483 if (PrintBytecodeHistogram) { 484 BytecodeHistogram::print(); 485 } 486 487 if (JvmtiExport::should_post_thread_life()) { 488 JvmtiExport::post_thread_end(thread); 489 } 490 491 // Always call even when there are not JVMTI environments yet, since environments 492 // may be attached late and JVMTI must track phases of VM execution 493 JvmtiExport::post_vm_death(); 494 Threads::shutdown_vm_agents(); 495 496 // Terminate the signal thread 497 // Note: we don't wait until it actually dies. 498 os::terminate_signal_thread(); 499 500 print_statistics(); 501 GC::gc()->heap()->print_tracing_info(); 502 503 { MutexLocker ml(BeforeExit_lock); 504 _before_exit_status = BEFORE_EXIT_DONE; 505 BeforeExit_lock->notify_all(); 506 } 507 508 if (VerifyStringTableAtExit) { 509 int fail_cnt = 0; 510 { 511 MutexLocker ml(StringTable_lock); 512 fail_cnt = StringTable::verify_and_compare_entries(); 513 } 514 515 if (fail_cnt != 0) { 516 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 517 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 518 } 519 } 520 521 #undef BEFORE_EXIT_NOT_RUN 522 #undef BEFORE_EXIT_RUNNING 523 #undef BEFORE_EXIT_DONE 524 } 525 526 void vm_exit(int code) { 527 Thread* thread = 528 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL; 529 if (thread == NULL) { 530 // very early initialization failure -- just exit 531 vm_direct_exit(code); 532 } 533 534 if (VMThread::vm_thread() != NULL) { 535 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 536 VM_Exit op(code); 537 if (thread->is_Java_thread()) 538 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 539 VMThread::execute(&op); 540 // should never reach here; but in case something wrong with VM Thread. 541 vm_direct_exit(code); 542 } else { 543 // VM thread is gone, just exit 544 vm_direct_exit(code); 545 } 546 ShouldNotReachHere(); 547 } 548 549 void notify_vm_shutdown() { 550 // For now, just a dtrace probe. 551 HOTSPOT_VM_SHUTDOWN(); 552 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 553 } 554 555 void vm_direct_exit(int code) { 556 notify_vm_shutdown(); 557 os::wait_for_keypress_at_exit(); 558 os::exit(code); 559 } 560 561 void vm_perform_shutdown_actions() { 562 // Warning: do not call 'exit_globals()' here. All threads are still running. 563 // Calling 'exit_globals()' will disable thread-local-storage and cause all 564 // kinds of assertions to trigger in debug mode. 565 if (is_init_completed()) { 566 Thread* thread = Thread::current_or_null(); 567 if (thread != NULL && thread->is_Java_thread()) { 568 // We are leaving the VM, set state to native (in case any OS exit 569 // handlers call back to the VM) 570 JavaThread* jt = (JavaThread*)thread; 571 // Must always be walkable or have no last_Java_frame when in 572 // thread_in_native 573 jt->frame_anchor()->make_walkable(jt); 574 jt->set_thread_state(_thread_in_native); 575 } 576 } 577 notify_vm_shutdown(); 578 } 579 580 void vm_shutdown() 581 { 582 vm_perform_shutdown_actions(); 583 os::wait_for_keypress_at_exit(); 584 os::shutdown(); 585 } 586 587 void vm_abort(bool dump_core) { 588 vm_perform_shutdown_actions(); 589 os::wait_for_keypress_at_exit(); 590 591 // Flush stdout and stderr before abort. 592 fflush(stdout); 593 fflush(stderr); 594 595 os::abort(dump_core); 596 ShouldNotReachHere(); 597 } 598 599 void vm_notify_during_shutdown(const char* error, const char* message) { 600 if (error != NULL) { 601 tty->print_cr("Error occurred during initialization of VM"); 602 tty->print("%s", error); 603 if (message != NULL) { 604 tty->print_cr(": %s", message); 605 } 606 else { 607 tty->cr(); 608 } 609 } 610 if (ShowMessageBoxOnError && WizardMode) { 611 fatal("Error occurred during initialization of VM"); 612 } 613 } 614 615 void vm_exit_during_initialization(Handle exception) { 616 tty->print_cr("Error occurred during initialization of VM"); 617 // If there are exceptions on this thread it must be cleared 618 // first and here. Any future calls to EXCEPTION_MARK requires 619 // that no pending exceptions exist. 620 Thread *THREAD = Thread::current(); // can't be NULL 621 if (HAS_PENDING_EXCEPTION) { 622 CLEAR_PENDING_EXCEPTION; 623 } 624 java_lang_Throwable::print_stack_trace(exception, tty); 625 tty->cr(); 626 vm_notify_during_shutdown(NULL, NULL); 627 628 // Failure during initialization, we don't want to dump core 629 vm_abort(false); 630 } 631 632 void vm_exit_during_initialization(Symbol* ex, const char* message) { 633 ResourceMark rm; 634 vm_notify_during_shutdown(ex->as_C_string(), message); 635 636 // Failure during initialization, we don't want to dump core 637 vm_abort(false); 638 } 639 640 void vm_exit_during_initialization(const char* error, const char* message) { 641 vm_notify_during_shutdown(error, message); 642 643 // Failure during initialization, we don't want to dump core 644 vm_abort(false); 645 } 646 647 void vm_shutdown_during_initialization(const char* error, const char* message) { 648 vm_notify_during_shutdown(error, message); 649 vm_shutdown(); 650 } 651 652 JDK_Version JDK_Version::_current; 653 const char* JDK_Version::_runtime_name; 654 const char* JDK_Version::_runtime_version; 655 656 void JDK_Version::initialize() { 657 jdk_version_info info; 658 assert(!_current.is_valid(), "Don't initialize twice"); 659 660 void *lib_handle = os::native_java_library(); 661 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 662 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 663 664 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223"); 665 666 (*func)(&info, sizeof(info)); 667 668 int major = JDK_VERSION_MAJOR(info.jdk_version); 669 int minor = JDK_VERSION_MINOR(info.jdk_version); 670 int security = JDK_VERSION_SECURITY(info.jdk_version); 671 int build = JDK_VERSION_BUILD(info.jdk_version); 672 673 // Incompatible with pre-4243978 JDK. 674 if (info.pending_list_uses_discovered_field == 0) { 675 vm_exit_during_initialization( 676 "Incompatible JDK is not using Reference.discovered field for pending list"); 677 } 678 _current = JDK_Version(major, minor, security, info.patch_version, build, 679 info.thread_park_blocker == 1, 680 info.post_vm_init_hook_enabled == 1); 681 } 682 683 void JDK_Version_init() { 684 JDK_Version::initialize(); 685 } 686 687 static int64_t encode_jdk_version(const JDK_Version& v) { 688 return 689 ((int64_t)v.major_version() << (BitsPerByte * 4)) | 690 ((int64_t)v.minor_version() << (BitsPerByte * 3)) | 691 ((int64_t)v.security_version() << (BitsPerByte * 2)) | 692 ((int64_t)v.patch_version() << (BitsPerByte * 1)) | 693 ((int64_t)v.build_number() << (BitsPerByte * 0)); 694 } 695 696 int JDK_Version::compare(const JDK_Version& other) const { 697 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 698 uint64_t e = encode_jdk_version(*this); 699 uint64_t o = encode_jdk_version(other); 700 return (e > o) ? 1 : ((e == o) ? 0 : -1); 701 } 702 703 void JDK_Version::to_string(char* buffer, size_t buflen) const { 704 assert(buffer && buflen > 0, "call with useful buffer"); 705 size_t index = 0; 706 707 if (!is_valid()) { 708 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 709 } else { 710 int rc = jio_snprintf( 711 &buffer[index], buflen - index, "%d.%d", _major, _minor); 712 if (rc == -1) return; 713 index += rc; 714 if (_security > 0) { 715 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security); 716 } 717 if (_patch > 0) { 718 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch); 719 if (rc == -1) return; 720 index += rc; 721 } 722 if (_build > 0) { 723 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build); 724 if (rc == -1) return; 725 index += rc; 726 } 727 } 728 }