1 /*
2 * Copyright (c) 1997, 2012, 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/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/task.hpp"
56 #include "runtime/thread.inline.hpp"
57 #include "runtime/timer.hpp"
58 #include "runtime/vm_operations.hpp"
59 #include "services/memReporter.hpp"
60 #include "services/memTracker.hpp"
61 #include "trace/tracing.hpp"
62 #include "trace/traceEventTypes.hpp"
63 #include "utilities/dtrace.hpp"
64 #include "utilities/globalDefinitions.hpp"
65 #include "utilities/histogram.hpp"
66 #include "utilities/macros.hpp"
67 #include "utilities/vmError.hpp"
68 #ifdef TARGET_ARCH_x86
69 # include "vm_version_x86.hpp"
70 #endif
71 #ifdef TARGET_ARCH_sparc
72 # include "vm_version_sparc.hpp"
73 #endif
74 #ifdef TARGET_ARCH_zero
75 # include "vm_version_zero.hpp"
76 #endif
77 #ifdef TARGET_ARCH_arm
78 # include "vm_version_arm.hpp"
79 #endif
80 #ifdef TARGET_ARCH_ppc
81 # include "vm_version_ppc.hpp"
82 #endif
83 #if INCLUDE_ALL_GCS
84 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
85 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
86 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
87 #endif // INCLUDE_ALL_GCS
88 #ifdef COMPILER1
89 #include "c1/c1_Compiler.hpp"
90 #include "c1/c1_Runtime1.hpp"
91 #endif
92 #ifdef COMPILER2
93 #include "code/compiledIC.hpp"
94 #include "compiler/methodLiveness.hpp"
95 #include "opto/compile.hpp"
96 #include "opto/indexSet.hpp"
97 #include "opto/runtime.hpp"
98 #endif
99
100 #ifndef USDT2
101 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
102 #endif /* !USDT2 */
103
104 #ifndef PRODUCT
105
106 // Statistics printing (method invocation histogram)
107
108 GrowableArray<Method*>* collected_invoked_methods;
109
110 void collect_invoked_methods(Method* m) {
111 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
112 collected_invoked_methods->push(m);
113 }
114 }
115
116
117 GrowableArray<Method*>* collected_profiled_methods;
118
119 void collect_profiled_methods(Method* m) {
120 Thread* thread = Thread::current();
121 // This HandleMark prevents a huge amount of handles from being added
122 // to the metadata_handles() array on the thread.
123 HandleMark hm(thread);
124 methodHandle mh(thread, m);
125 if ((m->method_data() != NULL) &&
126 (PrintMethodData || CompilerOracle::should_print(mh))) {
127 collected_profiled_methods->push(m);
128 }
129 }
130
131
132 int compare_methods(Method** a, Method** b) {
133 // %%% there can be 32-bit overflow here
134 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
135 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
136 }
137
138
139 void print_method_invocation_histogram() {
140 ResourceMark rm;
141 HandleMark hm;
142 collected_invoked_methods = new GrowableArray<Method*>(1024);
143 SystemDictionary::methods_do(collect_invoked_methods);
144 collected_invoked_methods->sort(&compare_methods);
145 //
146 tty->cr();
147 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
148 tty->cr();
149 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
150 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
151 synch_total = 0, nativ_total = 0, acces_total = 0;
152 for (int index = 0; index < collected_invoked_methods->length(); index++) {
153 Method* m = collected_invoked_methods->at(index);
154 int c = m->invocation_count() + m->compiled_invocation_count();
155 if (c >= MethodHistogramCutoff) m->print_invocation_count();
156 int_total += m->invocation_count();
157 comp_total += m->compiled_invocation_count();
158 if (m->is_final()) final_total += c;
159 if (m->is_static()) static_total += c;
160 if (m->is_synchronized()) synch_total += c;
161 if (m->is_native()) nativ_total += c;
162 if (m->is_accessor()) acces_total += c;
163 }
164 tty->cr();
165 total = int_total + comp_total;
166 tty->print_cr("Invocations summary:");
167 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
168 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
169 tty->print_cr("\t%9d (100%%) total", total);
170 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
171 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
172 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
173 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
174 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
175 tty->cr();
176 SharedRuntime::print_call_statistics(comp_total);
177 }
178
179 void print_method_profiling_data() {
180 ResourceMark rm;
181 HandleMark hm;
182 collected_profiled_methods = new GrowableArray<Method*>(1024);
183 SystemDictionary::methods_do(collect_profiled_methods);
184 collected_profiled_methods->sort(&compare_methods);
185
186 int count = collected_profiled_methods->length();
187 if (count > 0) {
188 for (int index = 0; index < count; index++) {
189 Method* m = collected_profiled_methods->at(index);
190 ttyLocker ttyl;
191 tty->print_cr("------------------------------------------------------------------------");
192 //m->print_name(tty);
193 m->print_invocation_count();
194 tty->cr();
195 m->print_codes();
196 }
197 tty->print_cr("------------------------------------------------------------------------");
198 }
199 }
200
201 void print_bytecode_count() {
202 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
203 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
204 }
205 }
206
207 AllocStats alloc_stats;
208
209
210
211 // General statistics printing (profiling ...)
212
213 void print_statistics() {
214
215 #ifdef ASSERT
216
217 if (CountRuntimeCalls) {
218 extern Histogram *RuntimeHistogram;
219 RuntimeHistogram->print();
220 }
221
222 if (CountJNICalls) {
223 extern Histogram *JNIHistogram;
224 JNIHistogram->print();
225 }
226
227 if (CountJVMCalls) {
228 extern Histogram *JVMHistogram;
229 JVMHistogram->print();
230 }
231
232 #endif
233
234 if (MemProfiling) {
235 MemProfiler::disengage();
236 }
237
238 if (CITime) {
239 CompileBroker::print_times();
240 }
241
242 #ifdef COMPILER1
243 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
244 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
245 Runtime1::print_statistics();
246 Deoptimization::print_statistics();
247 SharedRuntime::print_statistics();
248 nmethod::print_statistics();
249 }
250 #endif /* COMPILER1 */
251
252 #ifdef COMPILER2
253 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
254 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
255 Compile::print_statistics();
256 #ifndef COMPILER1
257 Deoptimization::print_statistics();
258 nmethod::print_statistics();
259 SharedRuntime::print_statistics();
260 #endif //COMPILER1
261 os::print_statistics();
262 }
263
264 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
265 OptoRuntime::print_named_counters();
266 }
267
268 if (TimeLivenessAnalysis) {
269 MethodLiveness::print_times();
270 }
271 #ifdef ASSERT
272 if (CollectIndexSetStatistics) {
273 IndexSet::print_statistics();
274 }
275 #endif // ASSERT
276 #endif // COMPILER2
277 if (CountCompiledCalls) {
278 print_method_invocation_histogram();
279 }
280 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
281 print_method_profiling_data();
282 }
283 if (TimeCompiler) {
284 COMPILER2_PRESENT(Compile::print_timers();)
285 }
286 if (TimeCompilationPolicy) {
287 CompilationPolicy::policy()->print_time();
288 }
289 if (TimeOopMap) {
290 GenerateOopMap::print_time();
291 }
292 if (ProfilerCheckIntervals) {
293 PeriodicTask::print_intervals();
294 }
295 if (PrintSymbolTableSizeHistogram) {
296 SymbolTable::print_histogram();
297 }
298 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
299 BytecodeCounter::print();
300 }
301 if (PrintBytecodePairHistogram) {
302 BytecodePairHistogram::print();
303 }
304
305 if (PrintCodeCache) {
306 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
307 CodeCache::print();
308 }
309
310 if (PrintCodeCache2) {
311 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
312 CodeCache::print_internals();
313 }
314
315 if (PrintClassStatistics) {
316 SystemDictionary::print_class_statistics();
317 }
318 if (PrintMethodStatistics) {
319 SystemDictionary::print_method_statistics();
320 }
321
322 if (PrintVtableStats) {
323 klassVtable::print_statistics();
324 klassItable::print_statistics();
325 }
326 if (VerifyOops) {
327 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
328 }
329
330 print_bytecode_count();
331 if (PrintMallocStatistics) {
332 tty->print("allocation stats: ");
333 alloc_stats.print();
334 tty->cr();
335 }
336
337 if (PrintSystemDictionaryAtExit) {
338 SystemDictionary::print();
339 }
340
341 if (PrintBiasedLockingStatistics) {
342 BiasedLocking::print_counters();
343 }
344
345 #ifdef ENABLE_ZAP_DEAD_LOCALS
346 #ifdef COMPILER2
347 if (ZapDeadCompiledLocals) {
348 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
349 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
350 }
351 #endif // COMPILER2
352 #endif // ENABLE_ZAP_DEAD_LOCALS
353 // Native memory tracking data
354 if (PrintNMTStatistics) {
355 if (MemTracker::is_on()) {
356 BaselineTTYOutputer outputer(tty);
357 MemTracker::print_memory_usage(outputer, K, false);
358 } else {
359 tty->print_cr(MemTracker::reason());
360 }
361 }
362 }
363
364 #else // PRODUCT MODE STATISTICS
365
366 void print_statistics() {
367
368 if (CITime) {
369 CompileBroker::print_times();
370 }
371
372 if (PrintCodeCache) {
373 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
374 CodeCache::print();
375 }
376
377 #ifdef COMPILER2
378 if (PrintPreciseBiasedLockingStatistics) {
379 OptoRuntime::print_named_counters();
380 }
381 #endif
382 if (PrintBiasedLockingStatistics) {
383 BiasedLocking::print_counters();
384 }
385
386 // Native memory tracking data
387 if (PrintNMTStatistics) {
388 if (MemTracker::is_on()) {
389 BaselineTTYOutputer outputer(tty);
390 MemTracker::print_memory_usage(outputer, K, false);
391 } else {
392 tty->print_cr(MemTracker::reason());
393 }
394 }
395 }
396
397 #endif
398
399
400 // Helper class for registering on_exit calls through JVM_OnExit
401
402 extern "C" {
403 typedef void (*__exit_proc)(void);
404 }
405
406 class ExitProc : public CHeapObj<mtInternal> {
407 private:
408 __exit_proc _proc;
409 // void (*_proc)(void);
410 ExitProc* _next;
411 public:
412 // ExitProc(void (*proc)(void)) {
413 ExitProc(__exit_proc proc) {
414 _proc = proc;
415 _next = NULL;
416 }
417 void evaluate() { _proc(); }
418 ExitProc* next() const { return _next; }
419 void set_next(ExitProc* next) { _next = next; }
420 };
421
422
423 // Linked list of registered on_exit procedures
424
425 static ExitProc* exit_procs = NULL;
426
427
428 extern "C" {
429 void register_on_exit_function(void (*func)(void)) {
430 ExitProc *entry = new ExitProc(func);
431 // Classic vm does not throw an exception in case the allocation failed,
432 if (entry != NULL) {
433 entry->set_next(exit_procs);
434 exit_procs = entry;
435 }
436 }
437 }
438
439 // Note: before_exit() can be executed only once, if more than one threads
440 // are trying to shutdown the VM at the same time, only one thread
441 // can run before_exit() and all other threads must wait.
442 void before_exit(JavaThread * thread) {
443 #define BEFORE_EXIT_NOT_RUN 0
444 #define BEFORE_EXIT_RUNNING 1
445 #define BEFORE_EXIT_DONE 2
446 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
447
448 // Note: don't use a Mutex to guard the entire before_exit(), as
449 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
450 // A CAS or OSMutex would work just fine but then we need to manipulate
451 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
452 // for synchronization.
453 { MutexLocker ml(BeforeExit_lock);
454 switch (_before_exit_status) {
455 case BEFORE_EXIT_NOT_RUN:
456 _before_exit_status = BEFORE_EXIT_RUNNING;
457 break;
458 case BEFORE_EXIT_RUNNING:
459 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
460 BeforeExit_lock->wait();
461 }
462 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
463 return;
464 case BEFORE_EXIT_DONE:
465 return;
466 }
467 }
468
469 // The only difference between this and Win32's _onexit procs is that
470 // this version is invoked before any threads get killed.
471 ExitProc* current = exit_procs;
472 while (current != NULL) {
473 ExitProc* next = current->next();
474 current->evaluate();
475 delete current;
476 current = next;
477 }
478
479 // Hang forever on exit if we're reporting an error.
480 if (ShowMessageBoxOnError && is_error_reported()) {
481 os::infinite_sleep();
482 }
483
484 // Terminate watcher thread - must before disenrolling any periodic task
485 if (PeriodicTask::num_tasks() > 0)
486 WatcherThread::stop();
487
488 // Print statistics gathered (profiling ...)
489 if (Arguments::has_profile()) {
490 FlatProfiler::disengage();
491 FlatProfiler::print(10);
492 }
493
494 // shut down the StatSampler task
495 StatSampler::disengage();
496 StatSampler::destroy();
497
498 // We do not need to explicitly stop concurrent GC threads because the
499 // JVM will be taken down at a safepoint when such threads are inactive --
500 // except for some concurrent G1 threads, see (comment in)
501 // Threads::destroy_vm().
502
503 // Print GC/heap related information.
504 if (PrintGCDetails) {
505 Universe::print();
506 AdaptiveSizePolicyOutput(0);
507 if (Verbose) {
508 ClassLoaderDataGraph::dump_on(gclog_or_tty);
509 }
510 }
511
512 if (PrintBytecodeHistogram) {
513 BytecodeHistogram::print();
514 }
515
516 if (JvmtiExport::should_post_thread_life()) {
517 JvmtiExport::post_thread_end(thread);
518 }
519
520 EVENT_BEGIN(TraceEventThreadEnd, event);
521 EVENT_COMMIT(event,
522 EVENT_SET(event, javalangthread, java_lang_Thread::thread_id(thread->threadObj())));
523
524 // Always call even when there are not JVMTI environments yet, since environments
525 // may be attached late and JVMTI must track phases of VM execution
526 JvmtiExport::post_vm_death();
527 Threads::shutdown_vm_agents();
528
529 // Terminate the signal thread
530 // Note: we don't wait until it actually dies.
531 os::terminate_signal_thread();
532
533 print_statistics();
534 Universe::heap()->print_tracing_info();
535
536 { MutexLocker ml(BeforeExit_lock);
537 _before_exit_status = BEFORE_EXIT_DONE;
538 BeforeExit_lock->notify_all();
539 }
540
541 // Shutdown NMT before exit. Otherwise,
542 // it will run into trouble when system destroys static variables.
543 MemTracker::shutdown(MemTracker::NMT_normal);
544
545 #undef BEFORE_EXIT_NOT_RUN
546 #undef BEFORE_EXIT_RUNNING
547 #undef BEFORE_EXIT_DONE
548 }
549
550 void vm_exit(int code) {
551 Thread* thread = ThreadLocalStorage::is_initialized() ?
552 ThreadLocalStorage::get_thread_slow() : NULL;
553 if (thread == NULL) {
554 // we have serious problems -- just exit
555 vm_direct_exit(code);
556 }
557
558 if (VMThread::vm_thread() != NULL) {
559 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
560 VM_Exit op(code);
561 if (thread->is_Java_thread())
562 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
563 VMThread::execute(&op);
564 // should never reach here; but in case something wrong with VM Thread.
565 vm_direct_exit(code);
566 } else {
567 // VM thread is gone, just exit
568 vm_direct_exit(code);
569 }
570 ShouldNotReachHere();
571 }
572
573 void notify_vm_shutdown() {
574 // For now, just a dtrace probe.
575 #ifndef USDT2
576 HS_DTRACE_PROBE(hotspot, vm__shutdown);
577 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
578 #else /* USDT2 */
579 HOTSPOT_VM_SHUTDOWN();
580 #endif /* USDT2 */
581 }
582
583 void vm_direct_exit(int code) {
584 notify_vm_shutdown();
585 os::wait_for_keypress_at_exit();
586 ::exit(code);
587 }
588
589 void vm_perform_shutdown_actions() {
590 // Warning: do not call 'exit_globals()' here. All threads are still running.
591 // Calling 'exit_globals()' will disable thread-local-storage and cause all
592 // kinds of assertions to trigger in debug mode.
593 if (is_init_completed()) {
594 Thread* thread = ThreadLocalStorage::is_initialized() ?
595 ThreadLocalStorage::get_thread_slow() : NULL;
596 if (thread != NULL && thread->is_Java_thread()) {
597 // We are leaving the VM, set state to native (in case any OS exit
598 // handlers call back to the VM)
599 JavaThread* jt = (JavaThread*)thread;
600 // Must always be walkable or have no last_Java_frame when in
601 // thread_in_native
602 jt->frame_anchor()->make_walkable(jt);
603 jt->set_thread_state(_thread_in_native);
604 }
605 }
606 notify_vm_shutdown();
607 }
608
609 void vm_shutdown()
610 {
611 vm_perform_shutdown_actions();
612 os::wait_for_keypress_at_exit();
613 os::shutdown();
614 }
615
616 void vm_abort(bool dump_core) {
617 vm_perform_shutdown_actions();
618 os::wait_for_keypress_at_exit();
619 os::abort(dump_core);
620 ShouldNotReachHere();
621 }
622
623 void vm_notify_during_shutdown(const char* error, const char* message) {
624 if (error != NULL) {
625 tty->print_cr("Error occurred during initialization of VM");
626 tty->print("%s", error);
627 if (message != NULL) {
628 tty->print_cr(": %s", message);
629 }
630 else {
631 tty->cr();
632 }
633 }
634 if (ShowMessageBoxOnError && WizardMode) {
635 fatal("Error occurred during initialization of VM");
636 }
637 }
638
639 void vm_exit_during_initialization(Handle exception) {
640 tty->print_cr("Error occurred during initialization of VM");
641 // If there are exceptions on this thread it must be cleared
642 // first and here. Any future calls to EXCEPTION_MARK requires
643 // that no pending exceptions exist.
644 Thread *THREAD = Thread::current();
645 if (HAS_PENDING_EXCEPTION) {
646 CLEAR_PENDING_EXCEPTION;
647 }
648 java_lang_Throwable::print(exception, tty);
649 tty->cr();
650 java_lang_Throwable::print_stack_trace(exception(), tty);
651 tty->cr();
652 vm_notify_during_shutdown(NULL, NULL);
653
654 // Failure during initialization, we don't want to dump core
655 vm_abort(false);
656 }
657
658 void vm_exit_during_initialization(Symbol* ex, const char* message) {
659 ResourceMark rm;
660 vm_notify_during_shutdown(ex->as_C_string(), message);
661
662 // Failure during initialization, we don't want to dump core
663 vm_abort(false);
664 }
665
666 void vm_exit_during_initialization(const char* error, const char* message) {
667 vm_notify_during_shutdown(error, message);
668
669 // Failure during initialization, we don't want to dump core
670 vm_abort(false);
671 }
672
673 void vm_shutdown_during_initialization(const char* error, const char* message) {
674 vm_notify_during_shutdown(error, message);
675 vm_shutdown();
676 }
677
678 JDK_Version JDK_Version::_current;
679 const char* JDK_Version::_runtime_name;
680 const char* JDK_Version::_runtime_version;
681
682 void JDK_Version::initialize() {
683 jdk_version_info info;
684 assert(!_current.is_valid(), "Don't initialize twice");
685
686 void *lib_handle = os::native_java_library();
687 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
688 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
689
690 if (func == NULL) {
691 // JDK older than 1.6
692 _current._partially_initialized = true;
693 } else {
694 (*func)(&info, sizeof(info));
695
696 int major = JDK_VERSION_MAJOR(info.jdk_version);
697 int minor = JDK_VERSION_MINOR(info.jdk_version);
698 int micro = JDK_VERSION_MICRO(info.jdk_version);
699 int build = JDK_VERSION_BUILD(info.jdk_version);
700 if (major == 1 && minor > 4) {
701 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
702 major = minor;
703 minor = micro;
704 micro = 0;
705 }
706 _current = JDK_Version(major, minor, micro, info.update_version,
707 info.special_update_version, build,
708 info.thread_park_blocker == 1,
709 info.post_vm_init_hook_enabled == 1,
710 info.pending_list_uses_discovered_field == 1);
711 }
712 }
713
714 void JDK_Version::fully_initialize(
715 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
716 // This is only called when current is less than 1.6 and we've gotten
717 // far enough in the initialization to determine the exact version.
718 assert(major < 6, "not needed for JDK version >= 6");
719 assert(is_partially_initialized(), "must not initialize");
720 if (major < 5) {
721 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
722 micro = minor;
723 minor = major;
724 major = 1;
725 }
726 _current = JDK_Version(major, minor, micro, update);
727 }
728
729 void JDK_Version_init() {
730 JDK_Version::initialize();
731 }
732
733 static int64_t encode_jdk_version(const JDK_Version& v) {
734 return
735 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
736 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
737 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
738 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
739 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
740 ((int64_t)v.build_number() << (BitsPerByte * 0));
741 }
742
743 int JDK_Version::compare(const JDK_Version& other) const {
744 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
745 if (!is_partially_initialized() && other.is_partially_initialized()) {
746 return -(other.compare(*this)); // flip the comparators
747 }
748 assert(!other.is_partially_initialized(), "Not initialized yet");
749 if (is_partially_initialized()) {
750 assert(other.major_version() >= 6,
751 "Invalid JDK version comparison during initialization");
752 return -1;
753 } else {
754 uint64_t e = encode_jdk_version(*this);
755 uint64_t o = encode_jdk_version(other);
756 return (e > o) ? 1 : ((e == o) ? 0 : -1);
757 }
758 }
759
760 void JDK_Version::to_string(char* buffer, size_t buflen) const {
761 size_t index = 0;
762 if (!is_valid()) {
763 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
764 } else if (is_partially_initialized()) {
765 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
766 } else {
767 index += jio_snprintf(
768 &buffer[index], buflen - index, "%d.%d", _major, _minor);
769 if (_micro > 0) {
770 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
771 }
772 if (_update > 0) {
773 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
774 }
775 if (_special > 0) {
776 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
777 }
778 if (_build > 0) {
779 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
780 }
781 }
782 }