1 /* 2 * Copyright (c) 1997, 2015, 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 "memory/oopFactory.hpp" 39 #include "memory/universe.hpp" 40 #include "oops/constantPool.hpp" 41 #include "oops/generateOopMap.hpp" 42 #include "oops/instanceKlass.hpp" 43 #include "oops/instanceOop.hpp" 44 #include "oops/method.hpp" 45 #include "oops/objArrayOop.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "oops/symbol.hpp" 48 #include "prims/jvmtiExport.hpp" 49 #include "runtime/arguments.hpp" 50 #include "runtime/biasedLocking.hpp" 51 #include "runtime/compilationPolicy.hpp" 52 #include "runtime/fprofiler.hpp" 53 #include "runtime/init.hpp" 54 #include "runtime/interfaceSupport.hpp" 55 #include "runtime/java.hpp" 56 #include "runtime/memprofiler.hpp" 57 #include "runtime/sharedRuntime.hpp" 58 #include "runtime/statSampler.hpp" 59 #include "runtime/sweeper.hpp" 60 #include "runtime/task.hpp" 61 #include "runtime/thread.inline.hpp" 62 #include "runtime/timer.hpp" 63 #include "runtime/vm_operations.hpp" 64 #include "services/memTracker.hpp" 65 #include "trace/tracing.hpp" 66 #include "utilities/dtrace.hpp" 67 #include "utilities/globalDefinitions.hpp" 68 #include "utilities/histogram.hpp" 69 #include "utilities/macros.hpp" 70 #include "utilities/vmError.hpp" 71 #if INCLUDE_ALL_GCS 72 #include "gc/cms/concurrentMarkSweepThread.hpp" 73 #include "gc/parallel/psScavenge.hpp" 74 #endif // INCLUDE_ALL_GCS 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 return; 423 } 424 } 425 426 #if INCLUDE_JVMCI 427 JVMCIRuntime::shutdown(); 428 #endif 429 430 // Hang forever on exit if we're reporting an error. 431 if (ShowMessageBoxOnError && is_error_reported()) { 432 os::infinite_sleep(); 433 } 434 435 // Stop the WatcherThread. We do this before disenrolling various 436 // PeriodicTasks to reduce the likelihood of races. 437 if (PeriodicTask::num_tasks() > 0) { 438 WatcherThread::stop(); 439 } 440 441 // Print statistics gathered (profiling ...) 442 if (Arguments::has_profile()) { 443 FlatProfiler::disengage(); 444 FlatProfiler::print(10); 445 } 446 447 // shut down the StatSampler task 448 StatSampler::disengage(); 449 StatSampler::destroy(); 450 451 // Stop concurrent GC threads 452 Universe::heap()->stop(); 453 454 // Print GC/heap related information. 455 if (PrintGCDetails) { 456 Universe::print(); 457 AdaptiveSizePolicyOutput(0); 458 if (Verbose) { 459 ClassLoaderDataGraph::dump_on(gclog_or_tty); 460 } 461 } 462 463 if (PrintBytecodeHistogram) { 464 BytecodeHistogram::print(); 465 } 466 467 if (JvmtiExport::should_post_thread_life()) { 468 JvmtiExport::post_thread_end(thread); 469 } 470 471 472 EventThreadEnd event; 473 if (event.should_commit()) { 474 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 475 event.commit(); 476 } 477 478 // Always call even when there are not JVMTI environments yet, since environments 479 // may be attached late and JVMTI must track phases of VM execution 480 JvmtiExport::post_vm_death(); 481 Threads::shutdown_vm_agents(); 482 483 // Terminate the signal thread 484 // Note: we don't wait until it actually dies. 485 os::terminate_signal_thread(); 486 487 print_statistics(); 488 Universe::heap()->print_tracing_info(); 489 490 { MutexLocker ml(BeforeExit_lock); 491 _before_exit_status = BEFORE_EXIT_DONE; 492 BeforeExit_lock->notify_all(); 493 } 494 495 if (VerifyStringTableAtExit) { 496 int fail_cnt = 0; 497 { 498 MutexLocker ml(StringTable_lock); 499 fail_cnt = StringTable::verify_and_compare_entries(); 500 } 501 502 if (fail_cnt != 0) { 503 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 504 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 505 } 506 } 507 508 #undef BEFORE_EXIT_NOT_RUN 509 #undef BEFORE_EXIT_RUNNING 510 #undef BEFORE_EXIT_DONE 511 } 512 513 void vm_exit(int code) { 514 Thread* thread = ThreadLocalStorage::is_initialized() ? 515 ThreadLocalStorage::get_thread_slow() : NULL; 516 if (thread == NULL) { 517 // we have serious problems -- just exit 518 vm_direct_exit(code); 519 } 520 521 if (VMThread::vm_thread() != NULL) { 522 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 523 VM_Exit op(code); 524 if (thread->is_Java_thread()) 525 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 526 VMThread::execute(&op); 527 // should never reach here; but in case something wrong with VM Thread. 528 vm_direct_exit(code); 529 } else { 530 // VM thread is gone, just exit 531 vm_direct_exit(code); 532 } 533 ShouldNotReachHere(); 534 } 535 536 void notify_vm_shutdown() { 537 // For now, just a dtrace probe. 538 HOTSPOT_VM_SHUTDOWN(); 539 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 540 } 541 542 void vm_direct_exit(int code) { 543 notify_vm_shutdown(); 544 os::wait_for_keypress_at_exit(); 545 os::exit(code); 546 } 547 548 void vm_perform_shutdown_actions() { 549 // Warning: do not call 'exit_globals()' here. All threads are still running. 550 // Calling 'exit_globals()' will disable thread-local-storage and cause all 551 // kinds of assertions to trigger in debug mode. 552 if (is_init_completed()) { 553 Thread* thread = ThreadLocalStorage::is_initialized() ? 554 ThreadLocalStorage::get_thread_slow() : NULL; 555 if (thread != NULL && thread->is_Java_thread()) { 556 // We are leaving the VM, set state to native (in case any OS exit 557 // handlers call back to the VM) 558 JavaThread* jt = (JavaThread*)thread; 559 // Must always be walkable or have no last_Java_frame when in 560 // thread_in_native 561 jt->frame_anchor()->make_walkable(jt); 562 jt->set_thread_state(_thread_in_native); 563 } 564 } 565 notify_vm_shutdown(); 566 } 567 568 void vm_shutdown() 569 { 570 vm_perform_shutdown_actions(); 571 os::wait_for_keypress_at_exit(); 572 os::shutdown(); 573 } 574 575 void vm_abort(bool dump_core) { 576 vm_perform_shutdown_actions(); 577 os::wait_for_keypress_at_exit(); 578 579 // Flush stdout and stderr before abort. 580 fflush(stdout); 581 fflush(stderr); 582 583 os::abort(dump_core); 584 ShouldNotReachHere(); 585 } 586 587 void vm_notify_during_shutdown(const char* error, const char* message) { 588 if (error != NULL) { 589 tty->print_cr("Error occurred during initialization of VM"); 590 tty->print("%s", error); 591 if (message != NULL) { 592 tty->print_cr(": %s", message); 593 } 594 else { 595 tty->cr(); 596 } 597 } 598 if (ShowMessageBoxOnError && WizardMode) { 599 fatal("Error occurred during initialization of VM"); 600 } 601 } 602 603 void vm_exit_during_initialization(Handle exception) { 604 tty->print_cr("Error occurred during initialization of VM"); 605 // If there are exceptions on this thread it must be cleared 606 // first and here. Any future calls to EXCEPTION_MARK requires 607 // that no pending exceptions exist. 608 Thread *THREAD = Thread::current(); 609 if (HAS_PENDING_EXCEPTION) { 610 CLEAR_PENDING_EXCEPTION; 611 } 612 java_lang_Throwable::print(exception, tty); 613 tty->cr(); 614 java_lang_Throwable::print_stack_trace(exception(), tty); 615 tty->cr(); 616 vm_notify_during_shutdown(NULL, NULL); 617 618 // Failure during initialization, we don't want to dump core 619 vm_abort(false); 620 } 621 622 void vm_exit_during_initialization(Symbol* ex, const char* message) { 623 ResourceMark rm; 624 vm_notify_during_shutdown(ex->as_C_string(), message); 625 626 // Failure during initialization, we don't want to dump core 627 vm_abort(false); 628 } 629 630 void vm_exit_during_initialization(const char* error, const char* message) { 631 vm_notify_during_shutdown(error, message); 632 633 // Failure during initialization, we don't want to dump core 634 vm_abort(false); 635 } 636 637 void vm_shutdown_during_initialization(const char* error, const char* message) { 638 vm_notify_during_shutdown(error, message); 639 vm_shutdown(); 640 } 641 642 JDK_Version JDK_Version::_current; 643 const char* JDK_Version::_runtime_name; 644 const char* JDK_Version::_runtime_version; 645 646 void JDK_Version::initialize() { 647 jdk_version_info info; 648 assert(!_current.is_valid(), "Don't initialize twice"); 649 650 void *lib_handle = os::native_java_library(); 651 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 652 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 653 654 if (func == NULL) { 655 // JDK older than 1.6 656 _current._partially_initialized = true; 657 } else { 658 (*func)(&info, sizeof(info)); 659 660 int major = JDK_VERSION_MAJOR(info.jdk_version); 661 int minor = JDK_VERSION_MINOR(info.jdk_version); 662 int micro = JDK_VERSION_MICRO(info.jdk_version); 663 int build = JDK_VERSION_BUILD(info.jdk_version); 664 if (major == 1 && minor > 4) { 665 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 666 major = minor; 667 minor = micro; 668 micro = 0; 669 } 670 // Incompatible with pre-4243978 JDK. 671 if (info.pending_list_uses_discovered_field == 0) { 672 vm_exit_during_initialization( 673 "Incompatible JDK is not using Reference.discovered field for pending list"); 674 } 675 _current = JDK_Version(major, minor, micro, info.update_version, 676 info.special_update_version, build, 677 info.thread_park_blocker == 1, 678 info.post_vm_init_hook_enabled == 1); 679 } 680 } 681 682 void JDK_Version::fully_initialize( 683 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 684 // This is only called when current is less than 1.6 and we've gotten 685 // far enough in the initialization to determine the exact version. 686 assert(major < 6, "not needed for JDK version >= 6"); 687 assert(is_partially_initialized(), "must not initialize"); 688 if (major < 5) { 689 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 690 micro = minor; 691 minor = major; 692 major = 1; 693 } 694 _current = JDK_Version(major, minor, micro, update); 695 } 696 697 void JDK_Version_init() { 698 JDK_Version::initialize(); 699 } 700 701 static int64_t encode_jdk_version(const JDK_Version& v) { 702 return 703 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 704 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 705 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 706 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 707 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 708 ((int64_t)v.build_number() << (BitsPerByte * 0)); 709 } 710 711 int JDK_Version::compare(const JDK_Version& other) const { 712 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 713 if (!is_partially_initialized() && other.is_partially_initialized()) { 714 return -(other.compare(*this)); // flip the comparators 715 } 716 assert(!other.is_partially_initialized(), "Not initialized yet"); 717 if (is_partially_initialized()) { 718 assert(other.major_version() >= 6, 719 "Invalid JDK version comparison during initialization"); 720 return -1; 721 } else { 722 uint64_t e = encode_jdk_version(*this); 723 uint64_t o = encode_jdk_version(other); 724 return (e > o) ? 1 : ((e == o) ? 0 : -1); 725 } 726 } 727 728 void JDK_Version::to_string(char* buffer, size_t buflen) const { 729 assert(buffer && buflen > 0, "call with useful buffer"); 730 size_t index = 0; 731 732 if (!is_valid()) { 733 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 734 } else if (is_partially_initialized()) { 735 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 736 } else { 737 int rc = jio_snprintf( 738 &buffer[index], buflen - index, "%d.%d", _major, _minor); 739 if (rc == -1) return; 740 index += rc; 741 if (_micro > 0) { 742 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 743 } 744 if (_update > 0) { 745 rc = jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 746 if (rc == -1) return; 747 index += rc; 748 } 749 if (_special > 0) { 750 rc = jio_snprintf(&buffer[index], buflen - index, "%c", _special); 751 if (rc == -1) return; 752 index += rc; 753 } 754 if (_build > 0) { 755 rc = jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 756 if (rc == -1) return; 757 index += rc; 758 } 759 } 760 }