java.cpp revision 2132:850b2295a494
1/* 2 * Copyright (c) 1997, 2011, 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/symbolTable.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/constantPoolOop.hpp" 37#include "oops/generateOopMap.hpp" 38#include "oops/instanceKlass.hpp" 39#include "oops/instanceKlassKlass.hpp" 40#include "oops/instanceOop.hpp" 41#include "oops/methodOop.hpp" 42#include "oops/objArrayOop.hpp" 43#include "oops/oop.inline.hpp" 44#include "oops/symbol.hpp" 45#include "prims/jvmtiExport.hpp" 46#include "runtime/aprofiler.hpp" 47#include "runtime/arguments.hpp" 48#include "runtime/biasedLocking.hpp" 49#include "runtime/compilationPolicy.hpp" 50#include "runtime/fprofiler.hpp" 51#include "runtime/init.hpp" 52#include "runtime/interfaceSupport.hpp" 53#include "runtime/java.hpp" 54#include "runtime/memprofiler.hpp" 55#include "runtime/sharedRuntime.hpp" 56#include "runtime/statSampler.hpp" 57#include "runtime/task.hpp" 58#include "runtime/timer.hpp" 59#include "runtime/vm_operations.hpp" 60#include "utilities/dtrace.hpp" 61#include "utilities/globalDefinitions.hpp" 62#include "utilities/histogram.hpp" 63#include "utilities/vmError.hpp" 64#ifdef TARGET_ARCH_x86 65# include "vm_version_x86.hpp" 66#endif 67#ifdef TARGET_ARCH_sparc 68# include "vm_version_sparc.hpp" 69#endif 70#ifdef TARGET_ARCH_zero 71# include "vm_version_zero.hpp" 72#endif 73#ifdef TARGET_ARCH_arm 74# include "vm_version_arm.hpp" 75#endif 76#ifdef TARGET_ARCH_ppc 77# include "vm_version_ppc.hpp" 78#endif 79#ifdef TARGET_OS_FAMILY_linux 80# include "thread_linux.inline.hpp" 81#endif 82#ifdef TARGET_OS_FAMILY_solaris 83# include "thread_solaris.inline.hpp" 84#endif 85#ifdef TARGET_OS_FAMILY_windows 86# include "thread_windows.inline.hpp" 87#endif 88#ifndef SERIALGC 89#include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" 90#include "gc_implementation/parallelScavenge/psScavenge.hpp" 91#include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 92#endif 93#ifdef COMPILER1 94#include "c1/c1_Compiler.hpp" 95#include "c1/c1_Runtime1.hpp" 96#endif 97#ifdef COMPILER2 98#include "code/compiledIC.hpp" 99#include "compiler/methodLiveness.hpp" 100#include "opto/compile.hpp" 101#include "opto/indexSet.hpp" 102#include "opto/runtime.hpp" 103#endif 104 105HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown); 106 107#ifndef PRODUCT 108 109// Statistics printing (method invocation histogram) 110 111GrowableArray<methodOop>* collected_invoked_methods; 112 113void collect_invoked_methods(methodOop m) { 114 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 115 collected_invoked_methods->push(m); 116 } 117} 118 119 120GrowableArray<methodOop>* collected_profiled_methods; 121 122void collect_profiled_methods(methodOop m) { 123 methodHandle mh(Thread::current(), m); 124 if ((m->method_data() != NULL) && 125 (PrintMethodData || CompilerOracle::should_print(mh))) { 126 collected_profiled_methods->push(m); 127 } 128} 129 130 131int compare_methods(methodOop* a, methodOop* b) { 132 // %%% there can be 32-bit overflow here 133 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 134 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 135} 136 137 138void print_method_invocation_histogram() { 139 ResourceMark rm; 140 HandleMark hm; 141 collected_invoked_methods = new GrowableArray<methodOop>(1024); 142 SystemDictionary::methods_do(collect_invoked_methods); 143 collected_invoked_methods->sort(&compare_methods); 144 // 145 tty->cr(); 146 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 147 tty->cr(); 148 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 149 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 150 synch_total = 0, nativ_total = 0, acces_total = 0; 151 for (int index = 0; index < collected_invoked_methods->length(); index++) { 152 methodOop m = collected_invoked_methods->at(index); 153 int c = m->invocation_count() + m->compiled_invocation_count(); 154 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 155 int_total += m->invocation_count(); 156 comp_total += m->compiled_invocation_count(); 157 if (m->is_final()) final_total += c; 158 if (m->is_static()) static_total += c; 159 if (m->is_synchronized()) synch_total += c; 160 if (m->is_native()) nativ_total += c; 161 if (m->is_accessor()) acces_total += c; 162 } 163 tty->cr(); 164 total = int_total + comp_total; 165 tty->print_cr("Invocations summary:"); 166 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 167 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 168 tty->print_cr("\t%9d (100%%) total", total); 169 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 170 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 171 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 172 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 173 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 174 tty->cr(); 175 SharedRuntime::print_call_statistics(comp_total); 176} 177 178void print_method_profiling_data() { 179 ResourceMark rm; 180 HandleMark hm; 181 collected_profiled_methods = new GrowableArray<methodOop>(1024); 182 SystemDictionary::methods_do(collect_profiled_methods); 183 collected_profiled_methods->sort(&compare_methods); 184 185 int count = collected_profiled_methods->length(); 186 if (count > 0) { 187 for (int index = 0; index < count; index++) { 188 methodOop m = collected_profiled_methods->at(index); 189 ttyLocker ttyl; 190 tty->print_cr("------------------------------------------------------------------------"); 191 //m->print_name(tty); 192 m->print_invocation_count(); 193 tty->cr(); 194 m->print_codes(); 195 } 196 tty->print_cr("------------------------------------------------------------------------"); 197 } 198} 199 200void print_bytecode_count() { 201 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 202 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 203 } 204} 205 206AllocStats alloc_stats; 207 208 209 210// General statistics printing (profiling ...) 211 212void print_statistics() { 213 214#ifdef ASSERT 215 216 if (CountRuntimeCalls) { 217 extern Histogram *RuntimeHistogram; 218 RuntimeHistogram->print(); 219 } 220 221 if (CountJNICalls) { 222 extern Histogram *JNIHistogram; 223 JNIHistogram->print(); 224 } 225 226 if (CountJVMCalls) { 227 extern Histogram *JVMHistogram; 228 JVMHistogram->print(); 229 } 230 231#endif 232 233 if (MemProfiling) { 234 MemProfiler::disengage(); 235 } 236 237 if (CITime) { 238 CompileBroker::print_times(); 239 } 240 241#ifdef COMPILER1 242 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 243 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 244 Runtime1::print_statistics(); 245 Deoptimization::print_statistics(); 246 nmethod::print_statistics(); 247 } 248#endif /* COMPILER1 */ 249 250#ifdef COMPILER2 251 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 252 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 253 Compile::print_statistics(); 254#ifndef COMPILER1 255 Deoptimization::print_statistics(); 256 nmethod::print_statistics(); 257#endif //COMPILER1 258 SharedRuntime::print_statistics(); 259 os::print_statistics(); 260 } 261 262 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) { 263 OptoRuntime::print_named_counters(); 264 } 265 266 if (TimeLivenessAnalysis) { 267 MethodLiveness::print_times(); 268 } 269#ifdef ASSERT 270 if (CollectIndexSetStatistics) { 271 IndexSet::print_statistics(); 272 } 273#endif // ASSERT 274#endif // COMPILER2 275 if (CountCompiledCalls) { 276 print_method_invocation_histogram(); 277 } 278 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) { 279 print_method_profiling_data(); 280 } 281 if (TimeCompiler) { 282 COMPILER2_PRESENT(Compile::print_timers();) 283 } 284 if (TimeCompilationPolicy) { 285 CompilationPolicy::policy()->print_time(); 286 } 287 if (TimeOopMap) { 288 GenerateOopMap::print_time(); 289 } 290 if (ProfilerCheckIntervals) { 291 PeriodicTask::print_intervals(); 292 } 293 if (PrintSymbolTableSizeHistogram) { 294 SymbolTable::print_histogram(); 295 } 296 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 297 BytecodeCounter::print(); 298 } 299 if (PrintBytecodePairHistogram) { 300 BytecodePairHistogram::print(); 301 } 302 303 if (PrintCodeCache) { 304 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 305 CodeCache::print(); 306 } 307 308 if (PrintCodeCache2) { 309 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 310 CodeCache::print_internals(); 311 } 312 313 if (PrintClassStatistics) { 314 SystemDictionary::print_class_statistics(); 315 } 316 if (PrintMethodStatistics) { 317 SystemDictionary::print_method_statistics(); 318 } 319 320 if (PrintVtableStats) { 321 klassVtable::print_statistics(); 322 klassItable::print_statistics(); 323 } 324 if (VerifyOops) { 325 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 326 } 327 328 print_bytecode_count(); 329 if (PrintMallocStatistics) { 330 tty->print("allocation stats: "); 331 alloc_stats.print(); 332 tty->cr(); 333 } 334 335 if (PrintSystemDictionaryAtExit) { 336 SystemDictionary::print(); 337 } 338 339 if (PrintBiasedLockingStatistics) { 340 BiasedLocking::print_counters(); 341 } 342 343#ifdef ENABLE_ZAP_DEAD_LOCALS 344#ifdef COMPILER2 345 if (ZapDeadCompiledLocals) { 346 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); 347 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); 348 } 349#endif // COMPILER2 350#endif // ENABLE_ZAP_DEAD_LOCALS 351} 352 353#else // PRODUCT MODE STATISTICS 354 355void print_statistics() { 356 357 if (CITime) { 358 CompileBroker::print_times(); 359 } 360#ifdef COMPILER2 361 if (PrintPreciseBiasedLockingStatistics) { 362 OptoRuntime::print_named_counters(); 363 } 364#endif 365 if (PrintBiasedLockingStatistics) { 366 BiasedLocking::print_counters(); 367 } 368} 369 370#endif 371 372 373// Helper class for registering on_exit calls through JVM_OnExit 374 375extern "C" { 376 typedef void (*__exit_proc)(void); 377} 378 379class ExitProc : public CHeapObj { 380 private: 381 __exit_proc _proc; 382 // void (*_proc)(void); 383 ExitProc* _next; 384 public: 385 // ExitProc(void (*proc)(void)) { 386 ExitProc(__exit_proc proc) { 387 _proc = proc; 388 _next = NULL; 389 } 390 void evaluate() { _proc(); } 391 ExitProc* next() const { return _next; } 392 void set_next(ExitProc* next) { _next = next; } 393}; 394 395 396// Linked list of registered on_exit procedures 397 398static ExitProc* exit_procs = NULL; 399 400 401extern "C" { 402 void register_on_exit_function(void (*func)(void)) { 403 ExitProc *entry = new ExitProc(func); 404 // Classic vm does not throw an exception in case the allocation failed, 405 if (entry != NULL) { 406 entry->set_next(exit_procs); 407 exit_procs = entry; 408 } 409 } 410} 411 412// Note: before_exit() can be executed only once, if more than one threads 413// are trying to shutdown the VM at the same time, only one thread 414// can run before_exit() and all other threads must wait. 415void before_exit(JavaThread * thread) { 416 #define BEFORE_EXIT_NOT_RUN 0 417 #define BEFORE_EXIT_RUNNING 1 418 #define BEFORE_EXIT_DONE 2 419 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 420 421 // Note: don't use a Mutex to guard the entire before_exit(), as 422 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 423 // A CAS or OSMutex would work just fine but then we need to manipulate 424 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 425 // for synchronization. 426 { MutexLocker ml(BeforeExit_lock); 427 switch (_before_exit_status) { 428 case BEFORE_EXIT_NOT_RUN: 429 _before_exit_status = BEFORE_EXIT_RUNNING; 430 break; 431 case BEFORE_EXIT_RUNNING: 432 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 433 BeforeExit_lock->wait(); 434 } 435 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 436 return; 437 case BEFORE_EXIT_DONE: 438 return; 439 } 440 } 441 442 // The only difference between this and Win32's _onexit procs is that 443 // this version is invoked before any threads get killed. 444 ExitProc* current = exit_procs; 445 while (current != NULL) { 446 ExitProc* next = current->next(); 447 current->evaluate(); 448 delete current; 449 current = next; 450 } 451 452 // Hang forever on exit if we're reporting an error. 453 if (ShowMessageBoxOnError && is_error_reported()) { 454 os::infinite_sleep(); 455 } 456 457 // Terminate watcher thread - must before disenrolling any periodic task 458 if (PeriodicTask::num_tasks() > 0) 459 WatcherThread::stop(); 460 461 // Print statistics gathered (profiling ...) 462 if (Arguments::has_profile()) { 463 FlatProfiler::disengage(); 464 FlatProfiler::print(10); 465 } 466 467 // shut down the StatSampler task 468 StatSampler::disengage(); 469 StatSampler::destroy(); 470 471#ifndef SERIALGC 472 // stop CMS threads 473 if (UseConcMarkSweepGC) { 474 ConcurrentMarkSweepThread::stop(); 475 } 476#endif // SERIALGC 477 478 // Print GC/heap related information. 479 if (PrintGCDetails) { 480 Universe::print(); 481 AdaptiveSizePolicyOutput(0); 482 } 483 484 485 if (Arguments::has_alloc_profile()) { 486 HandleMark hm; 487 // Do one last collection to enumerate all the objects 488 // allocated since the last one. 489 Universe::heap()->collect(GCCause::_allocation_profiler); 490 AllocationProfiler::disengage(); 491 AllocationProfiler::print(0); 492 } 493 494 if (PrintBytecodeHistogram) { 495 BytecodeHistogram::print(); 496 } 497 498 if (JvmtiExport::should_post_thread_life()) { 499 JvmtiExport::post_thread_end(thread); 500 } 501 // Always call even when there are not JVMTI environments yet, since environments 502 // may be attached late and JVMTI must track phases of VM execution 503 JvmtiExport::post_vm_death(); 504 Threads::shutdown_vm_agents(); 505 506 // Terminate the signal thread 507 // Note: we don't wait until it actually dies. 508 os::terminate_signal_thread(); 509 510 print_statistics(); 511 Universe::heap()->print_tracing_info(); 512 513 { MutexLocker ml(BeforeExit_lock); 514 _before_exit_status = BEFORE_EXIT_DONE; 515 BeforeExit_lock->notify_all(); 516 } 517 518 #undef BEFORE_EXIT_NOT_RUN 519 #undef BEFORE_EXIT_RUNNING 520 #undef BEFORE_EXIT_DONE 521} 522 523void vm_exit(int code) { 524 Thread* thread = ThreadLocalStorage::is_initialized() ? 525 ThreadLocalStorage::get_thread_slow() : NULL; 526 if (thread == NULL) { 527 // we have serious problems -- just exit 528 vm_direct_exit(code); 529 } 530 531 if (VMThread::vm_thread() != NULL) { 532 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 533 VM_Exit op(code); 534 if (thread->is_Java_thread()) 535 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 536 VMThread::execute(&op); 537 // should never reach here; but in case something wrong with VM Thread. 538 vm_direct_exit(code); 539 } else { 540 // VM thread is gone, just exit 541 vm_direct_exit(code); 542 } 543 ShouldNotReachHere(); 544} 545 546void notify_vm_shutdown() { 547 // For now, just a dtrace probe. 548 HS_DTRACE_PROBE(hotspot, vm__shutdown); 549 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 550} 551 552void vm_direct_exit(int code) { 553 notify_vm_shutdown(); 554 ::exit(code); 555} 556 557void vm_perform_shutdown_actions() { 558 // Warning: do not call 'exit_globals()' here. All threads are still running. 559 // Calling 'exit_globals()' will disable thread-local-storage and cause all 560 // kinds of assertions to trigger in debug mode. 561 if (is_init_completed()) { 562 Thread* thread = ThreadLocalStorage::is_initialized() ? 563 ThreadLocalStorage::get_thread_slow() : NULL; 564 if (thread != NULL && thread->is_Java_thread()) { 565 // We are leaving the VM, set state to native (in case any OS exit 566 // handlers call back to the VM) 567 JavaThread* jt = (JavaThread*)thread; 568 // Must always be walkable or have no last_Java_frame when in 569 // thread_in_native 570 jt->frame_anchor()->make_walkable(jt); 571 jt->set_thread_state(_thread_in_native); 572 } 573 } 574 notify_vm_shutdown(); 575} 576 577void vm_shutdown() 578{ 579 vm_perform_shutdown_actions(); 580 os::shutdown(); 581} 582 583void vm_abort(bool dump_core) { 584 vm_perform_shutdown_actions(); 585 os::abort(dump_core); 586 ShouldNotReachHere(); 587} 588 589void vm_notify_during_shutdown(const char* error, const char* message) { 590 if (error != NULL) { 591 tty->print_cr("Error occurred during initialization of VM"); 592 tty->print("%s", error); 593 if (message != NULL) { 594 tty->print_cr(": %s", message); 595 } 596 else { 597 tty->cr(); 598 } 599 } 600 if (ShowMessageBoxOnError && WizardMode) { 601 fatal("Error occurred during initialization of VM"); 602 } 603} 604 605void vm_exit_during_initialization(Handle exception) { 606 tty->print_cr("Error occurred during initialization of VM"); 607 // If there are exceptions on this thread it must be cleared 608 // first and here. Any future calls to EXCEPTION_MARK requires 609 // that no pending exceptions exist. 610 Thread *THREAD = Thread::current(); 611 if (HAS_PENDING_EXCEPTION) { 612 CLEAR_PENDING_EXCEPTION; 613 } 614 java_lang_Throwable::print(exception, tty); 615 tty->cr(); 616 java_lang_Throwable::print_stack_trace(exception(), tty); 617 tty->cr(); 618 vm_notify_during_shutdown(NULL, NULL); 619 620 // Failure during initialization, we don't want to dump core 621 vm_abort(false); 622} 623 624void vm_exit_during_initialization(Symbol* ex, const char* message) { 625 ResourceMark rm; 626 vm_notify_during_shutdown(ex->as_C_string(), message); 627 628 // Failure during initialization, we don't want to dump core 629 vm_abort(false); 630} 631 632void vm_exit_during_initialization(const char* error, const char* message) { 633 vm_notify_during_shutdown(error, message); 634 635 // Failure during initialization, we don't want to dump core 636 vm_abort(false); 637} 638 639void vm_shutdown_during_initialization(const char* error, const char* message) { 640 vm_notify_during_shutdown(error, message); 641 vm_shutdown(); 642} 643 644JDK_Version JDK_Version::_current; 645 646void 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 _current = JDK_Version(major, minor, micro, info.update_version, 671 info.special_update_version, build, 672 info.thread_park_blocker == 1, 673 info.post_vm_init_hook_enabled == 1); 674 } 675} 676 677void JDK_Version::fully_initialize( 678 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 679 // This is only called when current is less than 1.6 and we've gotten 680 // far enough in the initialization to determine the exact version. 681 assert(major < 6, "not needed for JDK version >= 6"); 682 assert(is_partially_initialized(), "must not initialize"); 683 if (major < 5) { 684 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 685 micro = minor; 686 minor = major; 687 major = 1; 688 } 689 _current = JDK_Version(major, minor, micro, update); 690} 691 692void JDK_Version_init() { 693 JDK_Version::initialize(); 694} 695 696static int64_t encode_jdk_version(const JDK_Version& v) { 697 return 698 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 699 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 700 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 701 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 702 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 703 ((int64_t)v.build_number() << (BitsPerByte * 0)); 704} 705 706int JDK_Version::compare(const JDK_Version& other) const { 707 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 708 if (!is_partially_initialized() && other.is_partially_initialized()) { 709 return -(other.compare(*this)); // flip the comparators 710 } 711 assert(!other.is_partially_initialized(), "Not initialized yet"); 712 if (is_partially_initialized()) { 713 assert(other.major_version() >= 6, 714 "Invalid JDK version comparison during initialization"); 715 return -1; 716 } else { 717 uint64_t e = encode_jdk_version(*this); 718 uint64_t o = encode_jdk_version(other); 719 return (e > o) ? 1 : ((e == o) ? 0 : -1); 720 } 721} 722 723void JDK_Version::to_string(char* buffer, size_t buflen) const { 724 size_t index = 0; 725 if (!is_valid()) { 726 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 727 } else if (is_partially_initialized()) { 728 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 729 } else { 730 index += jio_snprintf( 731 &buffer[index], buflen - index, "%d.%d", _major, _minor); 732 if (_micro > 0) { 733 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 734 } 735 if (_update > 0) { 736 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 737 } 738 if (_special > 0) { 739 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); 740 } 741 if (_build > 0) { 742 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 743 } 744 } 745} 746