1 /* 2 * Copyright (c) 1997, 2014, 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 "interpreter/bytecodeHistogram.hpp" 33 #include "memory/genCollectedHeap.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/universe.hpp" 36 #include "oops/constantPool.hpp" 37 #include "oops/generateOopMap.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceOop.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "prims/jvmtiExport.hpp" 45 #include "runtime/arguments.hpp" 46 #include "runtime/biasedLocking.hpp" 47 #include "runtime/compilationPolicy.hpp" 48 #include "runtime/fprofiler.hpp" 49 #include "runtime/init.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/memprofiler.hpp" 53 #include "runtime/sharedRuntime.hpp" 54 #include "runtime/statSampler.hpp" 55 #include "runtime/sweeper.hpp" 56 #include "runtime/task.hpp" 57 #include "runtime/thread.inline.hpp" 58 #include "runtime/timer.hpp" 59 #include "runtime/vm_operations.hpp" 60 #include "services/memTracker.hpp" 61 #include "trace/tracing.hpp" 62 #include "utilities/dtrace.hpp" 63 #include "utilities/globalDefinitions.hpp" 64 #include "utilities/histogram.hpp" 65 #include "utilities/macros.hpp" 66 #include "utilities/vmError.hpp" 67 #if INCLUDE_ALL_GCS 68 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" 69 #include "gc_implementation/parallelScavenge/psScavenge.hpp" 70 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 71 #endif // INCLUDE_ALL_GCS 72 #ifdef COMPILER1 73 #include "c1/c1_Compiler.hpp" 74 #include "c1/c1_Runtime1.hpp" 75 #endif 76 #ifdef COMPILER2 77 #include "code/compiledIC.hpp" 78 #include "compiler/methodLiveness.hpp" 79 #include "opto/compile.hpp" 80 #include "opto/indexSet.hpp" 81 #include "opto/runtime.hpp" 82 #endif 83 84 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 85 86 GrowableArray<Method*>* collected_profiled_methods; 87 88 int compare_methods(Method** a, Method** b) { 89 // %%% there can be 32-bit overflow here 90 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 91 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 92 } 93 94 void collect_profiled_methods(Method* m) { 95 Thread* thread = Thread::current(); 96 // This HandleMark prevents a huge amount of handles from being added 97 // to the metadata_handles() array on the thread. 98 HandleMark hm(thread); 99 methodHandle mh(thread, m); 100 if ((m->method_data() != NULL) && 101 (PrintMethodData || CompilerOracle::should_print(mh))) { 102 collected_profiled_methods->push(m); 103 } 104 } 105 106 void print_method_profiling_data() { 107 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) && 108 (PrintMethodData || CompilerOracle::should_print_methods())) { 109 ResourceMark rm; 110 HandleMark hm; 111 collected_profiled_methods = new GrowableArray<Method*>(1024); 112 ClassLoaderDataGraph::methods_do(collect_profiled_methods); 113 collected_profiled_methods->sort(&compare_methods); 114 115 int count = collected_profiled_methods->length(); 116 int total_size = 0; 117 if (count > 0) { 118 for (int index = 0; index < count; index++) { 119 Method* m = collected_profiled_methods->at(index); 120 ttyLocker ttyl; 121 tty->print_cr("------------------------------------------------------------------------"); 122 m->print_invocation_count(); 123 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 124 tty->cr(); 125 // Dump data on parameters if any 126 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 127 tty->fill_to(2); 128 m->method_data()->parameters_type_data()->print_data_on(tty); 129 } 130 m->print_codes(); 131 total_size += m->method_data()->size_in_bytes(); 132 } 133 tty->print_cr("------------------------------------------------------------------------"); 134 tty->print_cr("Total MDO size: %d bytes", total_size); 135 } 136 } 137 } 138 139 140 #ifndef PRODUCT 141 142 // Statistics printing (method invocation histogram) 143 144 GrowableArray<Method*>* collected_invoked_methods; 145 146 void collect_invoked_methods(Method* m) { 147 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 148 collected_invoked_methods->push(m); 149 } 150 } 151 152 153 154 155 void print_method_invocation_histogram() { 156 ResourceMark rm; 157 HandleMark hm; 158 collected_invoked_methods = new GrowableArray<Method*>(1024); 159 SystemDictionary::methods_do(collect_invoked_methods); 160 collected_invoked_methods->sort(&compare_methods); 161 // 162 tty->cr(); 163 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 164 tty->cr(); 165 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 166 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 167 synch_total = 0, nativ_total = 0, acces_total = 0; 168 for (int index = 0; index < collected_invoked_methods->length(); index++) { 169 Method* m = collected_invoked_methods->at(index); 170 int c = m->invocation_count() + m->compiled_invocation_count(); 171 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 172 int_total += m->invocation_count(); 173 comp_total += m->compiled_invocation_count(); 174 if (m->is_final()) final_total += c; 175 if (m->is_static()) static_total += c; 176 if (m->is_synchronized()) synch_total += c; 177 if (m->is_native()) nativ_total += c; 178 if (m->is_accessor()) acces_total += c; 179 } 180 tty->cr(); 181 total = int_total + comp_total; 182 tty->print_cr("Invocations summary:"); 183 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 184 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 185 tty->print_cr("\t%9d (100%%) total", total); 186 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 187 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 188 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 189 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 190 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 191 tty->cr(); 192 SharedRuntime::print_call_statistics(comp_total); 193 } 194 195 void print_bytecode_count() { 196 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 197 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 198 } 199 } 200 201 AllocStats alloc_stats; 202 203 204 205 // General statistics printing (profiling ...) 206 void print_statistics() { 207 #ifdef ASSERT 208 209 if (CountRuntimeCalls) { 210 extern Histogram *RuntimeHistogram; 211 RuntimeHistogram->print(); 212 } 213 214 if (CountJNICalls) { 215 extern Histogram *JNIHistogram; 216 JNIHistogram->print(); 217 } 218 219 if (CountJVMCalls) { 220 extern Histogram *JVMHistogram; 221 JVMHistogram->print(); 222 } 223 224 #endif 225 226 if (MemProfiling) { 227 MemProfiler::disengage(); 228 } 229 230 if (CITime) { 231 CompileBroker::print_times(); 232 } 233 234 #ifdef COMPILER1 235 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 236 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 237 Runtime1::print_statistics(); 238 Deoptimization::print_statistics(); 239 SharedRuntime::print_statistics(); 240 nmethod::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 nmethod::print_statistics(); 251 SharedRuntime::print_statistics(); 252 #endif //COMPILER1 253 os::print_statistics(); 254 } 255 256 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 257 OptoRuntime::print_named_counters(); 258 } 259 260 if (TimeLivenessAnalysis) { 261 MethodLiveness::print_times(); 262 } 263 #ifdef ASSERT 264 if (CollectIndexSetStatistics) { 265 IndexSet::print_statistics(); 266 } 267 #endif // ASSERT 268 #endif // COMPILER2 269 if (CountCompiledCalls) { 270 print_method_invocation_histogram(); 271 } 272 273 print_method_profiling_data(); 274 275 if (TimeCompilationPolicy) { 276 CompilationPolicy::policy()->print_time(); 277 } 278 if (TimeOopMap) { 279 GenerateOopMap::print_time(); 280 } 281 if (ProfilerCheckIntervals) { 282 PeriodicTask::print_intervals(); 283 } 284 if (PrintSymbolTableSizeHistogram) { 285 SymbolTable::print_histogram(); 286 } 287 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 288 BytecodeCounter::print(); 289 } 290 if (PrintBytecodePairHistogram) { 291 BytecodePairHistogram::print(); 292 } 293 294 if (PrintCodeCache) { 295 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 296 CodeCache::print(); 297 } 298 299 if (PrintMethodFlushingStatistics) { 300 NMethodSweeper::print(); 301 } 302 303 if (PrintCodeCache2) { 304 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 305 CodeCache::print_internals(); 306 } 307 308 if (PrintClassStatistics) { 309 SystemDictionary::print_class_statistics(); 310 } 311 if (PrintMethodStatistics) { 312 SystemDictionary::print_method_statistics(); 313 } 314 315 if (PrintVtableStats) { 316 klassVtable::print_statistics(); 317 klassItable::print_statistics(); 318 } 319 if (VerifyOops) { 320 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 321 } 322 323 print_bytecode_count(); 324 if (PrintMallocStatistics) { 325 tty->print("allocation stats: "); 326 alloc_stats.print(); 327 tty->cr(); 328 } 329 330 if (PrintSystemDictionaryAtExit) { 331 SystemDictionary::print(); 332 } 333 334 if (PrintBiasedLockingStatistics) { 335 BiasedLocking::print_counters(); 336 } 337 338 #ifdef ENABLE_ZAP_DEAD_LOCALS 339 #ifdef COMPILER2 340 if (ZapDeadCompiledLocals) { 341 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); 342 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); 343 } 344 #endif // COMPILER2 345 #endif // ENABLE_ZAP_DEAD_LOCALS 346 // Native memory tracking data 347 if (PrintNMTStatistics) { 348 MemTracker::final_report(tty); 349 } 350 } 351 352 #else // PRODUCT MODE STATISTICS 353 354 void print_statistics() { 355 356 if (PrintMethodData) { 357 print_method_profiling_data(); 358 } 359 360 if (CITime) { 361 CompileBroker::print_times(); 362 } 363 364 if (PrintCodeCache) { 365 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 366 CodeCache::print(); 367 } 368 369 if (PrintMethodFlushingStatistics) { 370 NMethodSweeper::print(); 371 } 372 373 #ifdef COMPILER2 374 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 375 OptoRuntime::print_named_counters(); 376 } 377 #endif 378 if (PrintBiasedLockingStatistics) { 379 BiasedLocking::print_counters(); 380 } 381 382 // Native memory tracking data 383 if (PrintNMTStatistics) { 384 MemTracker::final_report(tty); 385 } 386 } 387 388 #endif 389 390 // Note: before_exit() can be executed only once, if more than one threads 391 // are trying to shutdown the VM at the same time, only one thread 392 // can run before_exit() and all other threads must wait. 393 void before_exit(JavaThread * thread) { 394 #define BEFORE_EXIT_NOT_RUN 0 395 #define BEFORE_EXIT_RUNNING 1 396 #define BEFORE_EXIT_DONE 2 397 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 398 399 // Note: don't use a Mutex to guard the entire before_exit(), as 400 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 401 // A CAS or OSMutex would work just fine but then we need to manipulate 402 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 403 // for synchronization. 404 { MutexLocker ml(BeforeExit_lock); 405 switch (_before_exit_status) { 406 case BEFORE_EXIT_NOT_RUN: 407 _before_exit_status = BEFORE_EXIT_RUNNING; 408 break; 409 case BEFORE_EXIT_RUNNING: 410 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 411 BeforeExit_lock->wait(); 412 } 413 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 414 return; 415 case BEFORE_EXIT_DONE: 416 return; 417 } 418 } 419 420 // Hang forever on exit if we're reporting an error. 421 if (ShowMessageBoxOnError && is_error_reported()) { 422 os::infinite_sleep(); 423 } 424 425 // Terminate watcher thread - must before disenrolling any periodic task 426 if (PeriodicTask::num_tasks() > 0) 427 WatcherThread::stop(); 428 429 // Print statistics gathered (profiling ...) 430 if (Arguments::has_profile()) { 431 FlatProfiler::disengage(); 432 FlatProfiler::print(10); 433 } 434 435 // shut down the StatSampler task 436 StatSampler::disengage(); 437 StatSampler::destroy(); 438 439 // Stop concurrent GC threads 440 Universe::heap()->stop(); 441 442 // Print GC/heap related information. 443 if (PrintGCDetails) { 444 Universe::print(); 445 AdaptiveSizePolicyOutput(0); 446 if (Verbose) { 447 ClassLoaderDataGraph::dump_on(gclog_or_tty); 448 } 449 } 450 451 if (PrintBytecodeHistogram) { 452 BytecodeHistogram::print(); 453 } 454 455 if (JvmtiExport::should_post_thread_life()) { 456 JvmtiExport::post_thread_end(thread); 457 } 458 459 460 EventThreadEnd event; 461 if (event.should_commit()) { 462 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 463 event.commit(); 464 } 465 466 // Always call even when there are not JVMTI environments yet, since environments 467 // may be attached late and JVMTI must track phases of VM execution 468 JvmtiExport::post_vm_death(); 469 Threads::shutdown_vm_agents(); 470 471 // Terminate the signal thread 472 // Note: we don't wait until it actually dies. 473 os::terminate_signal_thread(); 474 475 print_statistics(); 476 Universe::heap()->print_tracing_info(); 477 478 { MutexLocker ml(BeforeExit_lock); 479 _before_exit_status = BEFORE_EXIT_DONE; 480 BeforeExit_lock->notify_all(); 481 } 482 483 if (VerifyStringTableAtExit) { 484 int fail_cnt = 0; 485 { 486 MutexLocker ml(StringTable_lock); 487 fail_cnt = StringTable::verify_and_compare_entries(); 488 } 489 490 if (fail_cnt != 0) { 491 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 492 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 493 } 494 } 495 496 #undef BEFORE_EXIT_NOT_RUN 497 #undef BEFORE_EXIT_RUNNING 498 #undef BEFORE_EXIT_DONE 499 } 500 501 void vm_exit(int code) { 502 Thread* thread = ThreadLocalStorage::is_initialized() ? 503 ThreadLocalStorage::get_thread_slow() : NULL; 504 if (thread == NULL) { 505 // we have serious problems -- just exit 506 vm_direct_exit(code); 507 } 508 509 if (VMThread::vm_thread() != NULL) { 510 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 511 VM_Exit op(code); 512 if (thread->is_Java_thread()) 513 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 514 VMThread::execute(&op); 515 // should never reach here; but in case something wrong with VM Thread. 516 vm_direct_exit(code); 517 } else { 518 // VM thread is gone, just exit 519 vm_direct_exit(code); 520 } 521 ShouldNotReachHere(); 522 } 523 524 void notify_vm_shutdown() { 525 // For now, just a dtrace probe. 526 HOTSPOT_VM_SHUTDOWN(); 527 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 528 } 529 530 void vm_direct_exit(int code) { 531 notify_vm_shutdown(); 532 os::wait_for_keypress_at_exit(); 533 os::exit(code); 534 } 535 536 void vm_perform_shutdown_actions() { 537 // Warning: do not call 'exit_globals()' here. All threads are still running. 538 // Calling 'exit_globals()' will disable thread-local-storage and cause all 539 // kinds of assertions to trigger in debug mode. 540 if (is_init_completed()) { 541 Thread* thread = ThreadLocalStorage::is_initialized() ? 542 ThreadLocalStorage::get_thread_slow() : NULL; 543 if (thread != NULL && thread->is_Java_thread()) { 544 // We are leaving the VM, set state to native (in case any OS exit 545 // handlers call back to the VM) 546 JavaThread* jt = (JavaThread*)thread; 547 // Must always be walkable or have no last_Java_frame when in 548 // thread_in_native 549 jt->frame_anchor()->make_walkable(jt); 550 jt->set_thread_state(_thread_in_native); 551 } 552 } 553 notify_vm_shutdown(); 554 } 555 556 void vm_shutdown() 557 { 558 vm_perform_shutdown_actions(); 559 os::wait_for_keypress_at_exit(); 560 os::shutdown(); 561 } 562 563 void vm_abort(bool dump_core) { 564 vm_perform_shutdown_actions(); 565 os::wait_for_keypress_at_exit(); 566 os::abort(dump_core); 567 ShouldNotReachHere(); 568 } 569 570 void vm_notify_during_shutdown(const char* error, const char* message) { 571 if (error != NULL) { 572 tty->print_cr("Error occurred during initialization of VM"); 573 tty->print("%s", error); 574 if (message != NULL) { 575 tty->print_cr(": %s", message); 576 } 577 else { 578 tty->cr(); 579 } 580 } 581 if (ShowMessageBoxOnError && WizardMode) { 582 fatal("Error occurred during initialization of VM"); 583 } 584 } 585 586 void vm_exit_during_initialization(Handle exception) { 587 tty->print_cr("Error occurred during initialization of VM"); 588 // If there are exceptions on this thread it must be cleared 589 // first and here. Any future calls to EXCEPTION_MARK requires 590 // that no pending exceptions exist. 591 Thread *THREAD = Thread::current(); 592 if (HAS_PENDING_EXCEPTION) { 593 CLEAR_PENDING_EXCEPTION; 594 } 595 java_lang_Throwable::print(exception, tty); 596 tty->cr(); 597 java_lang_Throwable::print_stack_trace(exception(), tty); 598 tty->cr(); 599 vm_notify_during_shutdown(NULL, NULL); 600 601 // Failure during initialization, we don't want to dump core 602 vm_abort(false); 603 } 604 605 void vm_exit_during_initialization(Symbol* ex, const char* message) { 606 ResourceMark rm; 607 vm_notify_during_shutdown(ex->as_C_string(), message); 608 609 // Failure during initialization, we don't want to dump core 610 vm_abort(false); 611 } 612 613 void vm_exit_during_initialization(const char* error, const char* message) { 614 vm_notify_during_shutdown(error, message); 615 616 // Failure during initialization, we don't want to dump core 617 vm_abort(false); 618 } 619 620 void vm_shutdown_during_initialization(const char* error, const char* message) { 621 vm_notify_during_shutdown(error, message); 622 vm_shutdown(); 623 } 624 625 JDK_Version JDK_Version::_current; 626 const char* JDK_Version::_runtime_name; 627 const char* JDK_Version::_runtime_version; 628 629 void JDK_Version::initialize() { 630 jdk_version_info info; 631 assert(!_current.is_valid(), "Don't initialize twice"); 632 633 void *lib_handle = os::native_java_library(); 634 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 635 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 636 637 if (func == NULL) { 638 // JDK older than 1.6 639 _current._partially_initialized = true; 640 } else { 641 (*func)(&info, sizeof(info)); 642 643 int major = JDK_VERSION_MAJOR(info.jdk_version); 644 int minor = JDK_VERSION_MINOR(info.jdk_version); 645 int micro = JDK_VERSION_MICRO(info.jdk_version); 646 int build = JDK_VERSION_BUILD(info.jdk_version); 647 if (major == 1 && minor > 4) { 648 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 649 major = minor; 650 minor = micro; 651 micro = 0; 652 } 653 _current = JDK_Version(major, minor, micro, info.update_version, 654 info.special_update_version, build, 655 info.thread_park_blocker == 1, 656 info.post_vm_init_hook_enabled == 1, 657 info.pending_list_uses_discovered_field == 1); 658 } 659 } 660 661 void JDK_Version::fully_initialize( 662 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 663 // This is only called when current is less than 1.6 and we've gotten 664 // far enough in the initialization to determine the exact version. 665 assert(major < 6, "not needed for JDK version >= 6"); 666 assert(is_partially_initialized(), "must not initialize"); 667 if (major < 5) { 668 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 669 micro = minor; 670 minor = major; 671 major = 1; 672 } 673 _current = JDK_Version(major, minor, micro, update); 674 } 675 676 void JDK_Version_init() { 677 JDK_Version::initialize(); 678 } 679 680 static int64_t encode_jdk_version(const JDK_Version& v) { 681 return 682 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 683 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 684 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 685 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 686 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 687 ((int64_t)v.build_number() << (BitsPerByte * 0)); 688 } 689 690 int JDK_Version::compare(const JDK_Version& other) const { 691 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 692 if (!is_partially_initialized() && other.is_partially_initialized()) { 693 return -(other.compare(*this)); // flip the comparators 694 } 695 assert(!other.is_partially_initialized(), "Not initialized yet"); 696 if (is_partially_initialized()) { 697 assert(other.major_version() >= 6, 698 "Invalid JDK version comparison during initialization"); 699 return -1; 700 } else { 701 uint64_t e = encode_jdk_version(*this); 702 uint64_t o = encode_jdk_version(other); 703 return (e > o) ? 1 : ((e == o) ? 0 : -1); 704 } 705 } 706 707 void JDK_Version::to_string(char* buffer, size_t buflen) const { 708 size_t index = 0; 709 if (!is_valid()) { 710 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 711 } else if (is_partially_initialized()) { 712 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 713 } else { 714 index += jio_snprintf( 715 &buffer[index], buflen - index, "%d.%d", _major, _minor); 716 if (_micro > 0) { 717 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 718 } 719 if (_update > 0) { 720 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 721 } 722 if (_special > 0) { 723 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); 724 } 725 if (_build > 0) { 726 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 727 } 728 } 729 }