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src/share/vm/runtime/java.cpp@850b2295a494
src/share/vm/runtime/java.cpp
Mon, 14 Feb 2011 14:36:29 -0800
- author
- kvn
- date
- Mon, 14 Feb 2011 14:36:29 -0800
- changeset 2567
- 850b2295a494
- parent 2508
- b92c45f2bc75
- parent 2557
- f7de3327c683
- child 2586
- 23ae54207126
- permissions
- -rw-r--r--
Merge
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 */
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
105 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
107 #ifndef PRODUCT
109 // Statistics printing (method invocation histogram)
111 GrowableArray<methodOop>* collected_invoked_methods;
113 void collect_invoked_methods(methodOop m) {
114 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
115 collected_invoked_methods->push(m);
116 }
117 }
120 GrowableArray<methodOop>* collected_profiled_methods;
122 void 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 }
131 int 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 }
138 void 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 }
178 void 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);
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 }
200 void print_bytecode_count() {
201 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
202 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
203 }
204 }
206 AllocStats alloc_stats;
210 // General statistics printing (profiling ...)
212 void print_statistics() {
214 #ifdef ASSERT
216 if (CountRuntimeCalls) {
217 extern Histogram *RuntimeHistogram;
218 RuntimeHistogram->print();
219 }
221 if (CountJNICalls) {
222 extern Histogram *JNIHistogram;
223 JNIHistogram->print();
224 }
226 if (CountJVMCalls) {
227 extern Histogram *JVMHistogram;
228 JVMHistogram->print();
229 }
231 #endif
233 if (MemProfiling) {
234 MemProfiler::disengage();
235 }
237 if (CITime) {
238 CompileBroker::print_times();
239 }
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 */
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 }
262 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
263 OptoRuntime::print_named_counters();
264 }
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 }
303 if (PrintCodeCache) {
304 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
305 CodeCache::print();
306 }
308 if (PrintCodeCache2) {
309 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
310 CodeCache::print_internals();
311 }
313 if (PrintClassStatistics) {
314 SystemDictionary::print_class_statistics();
315 }
316 if (PrintMethodStatistics) {
317 SystemDictionary::print_method_statistics();
318 }
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 }
328 print_bytecode_count();
329 if (PrintMallocStatistics) {
330 tty->print("allocation stats: ");
331 alloc_stats.print();
332 tty->cr();
333 }
335 if (PrintSystemDictionaryAtExit) {
336 SystemDictionary::print();
337 }
339 if (PrintBiasedLockingStatistics) {
340 BiasedLocking::print_counters();
341 }
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 }
353 #else // PRODUCT MODE STATISTICS
355 void print_statistics() {
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 }
370 #endif
373 // Helper class for registering on_exit calls through JVM_OnExit
375 extern "C" {
376 typedef void (*__exit_proc)(void);
377 }
379 class 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 };
396 // Linked list of registered on_exit procedures
398 static ExitProc* exit_procs = NULL;
401 extern "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 }
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.
415 void 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;
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 }
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 }
452 // Hang forever on exit if we're reporting an error.
453 if (ShowMessageBoxOnError && is_error_reported()) {
454 os::infinite_sleep();
455 }
457 // Terminate watcher thread - must before disenrolling any periodic task
458 if (PeriodicTask::num_tasks() > 0)
459 WatcherThread::stop();
461 // Print statistics gathered (profiling ...)
462 if (Arguments::has_profile()) {
463 FlatProfiler::disengage();
464 FlatProfiler::print(10);
465 }
467 // shut down the StatSampler task
468 StatSampler::disengage();
469 StatSampler::destroy();
471 #ifndef SERIALGC
472 // stop CMS threads
473 if (UseConcMarkSweepGC) {
474 ConcurrentMarkSweepThread::stop();
475 }
476 #endif // SERIALGC
478 // Print GC/heap related information.
479 if (PrintGCDetails) {
480 Universe::print();
481 AdaptiveSizePolicyOutput(0);
482 }
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 }
494 if (PrintBytecodeHistogram) {
495 BytecodeHistogram::print();
496 }
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();
506 // Terminate the signal thread
507 // Note: we don't wait until it actually dies.
508 os::terminate_signal_thread();
510 print_statistics();
511 Universe::heap()->print_tracing_info();
513 { MutexLocker ml(BeforeExit_lock);
514 _before_exit_status = BEFORE_EXIT_DONE;
515 BeforeExit_lock->notify_all();
516 }
518 #undef BEFORE_EXIT_NOT_RUN
519 #undef BEFORE_EXIT_RUNNING
520 #undef BEFORE_EXIT_DONE
521 }
523 void 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 }
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 }
546 void 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 }
552 void vm_direct_exit(int code) {
553 notify_vm_shutdown();
554 ::exit(code);
555 }
557 void 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 }
577 void vm_shutdown()
578 {
579 vm_perform_shutdown_actions();
580 os::shutdown();
581 }
583 void vm_abort(bool dump_core) {
584 vm_perform_shutdown_actions();
585 os::abort(dump_core);
586 ShouldNotReachHere();
587 }
589 void 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 }
605 void 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);
620 // Failure during initialization, we don't want to dump core
621 vm_abort(false);
622 }
624 void vm_exit_during_initialization(Symbol* ex, const char* message) {
625 ResourceMark rm;
626 vm_notify_during_shutdown(ex->as_C_string(), message);
628 // Failure during initialization, we don't want to dump core
629 vm_abort(false);
630 }
632 void vm_exit_during_initialization(const char* error, const char* message) {
633 vm_notify_during_shutdown(error, message);
635 // Failure during initialization, we don't want to dump core
636 vm_abort(false);
637 }
639 void vm_shutdown_during_initialization(const char* error, const char* message) {
640 vm_notify_during_shutdown(error, message);
641 vm_shutdown();
642 }
644 JDK_Version JDK_Version::_current;
646 void JDK_Version::initialize() {
647 jdk_version_info info;
648 assert(!_current.is_valid(), "Don't initialize twice");
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"));
654 if (func == NULL) {
655 // JDK older than 1.6
656 _current._partially_initialized = true;
657 } else {
658 (*func)(&info, sizeof(info));
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 }
677 void 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 }
692 void JDK_Version_init() {
693 JDK_Version::initialize();
694 }
696 static 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 }
706 int 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 }
723 void 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 }
