1 /*
2 * Copyright (c) 1997, 2013, 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/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/memReporter.hpp"
61 #include "services/memTracker.hpp"
62 #include "trace/tracing.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 void print_statistics() {
213 #ifdef ASSERT
214
215 if (CountRuntimeCalls) {
216 extern Histogram *RuntimeHistogram;
217 RuntimeHistogram->print();
218 }
219
220 if (CountJNICalls) {
221 extern Histogram *JNIHistogram;
222 JNIHistogram->print();
223 }
224
225 if (CountJVMCalls) {
226 extern Histogram *JVMHistogram;
227 JVMHistogram->print();
228 }
229
230 #endif
231
232 if (MemProfiling) {
233 MemProfiler::disengage();
234 }
235
236 if (CITime) {
237 CompileBroker::print_times();
238 }
239
240 #ifdef COMPILER1
241 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
242 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
243 Runtime1::print_statistics();
244 Deoptimization::print_statistics();
245 SharedRuntime::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 SharedRuntime::print_statistics();
258 #endif //COMPILER1
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 (PrintMethodFlushingStatistics) {
309 NMethodSweeper::print();
310 }
311
312 if (PrintCodeCache2) {
313 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
314 CodeCache::print_internals();
315 }
316
317 if (PrintClassStatistics) {
318 SystemDictionary::print_class_statistics();
319 }
320 if (PrintMethodStatistics) {
321 SystemDictionary::print_method_statistics();
322 }
323
324 if (PrintVtableStats) {
325 klassVtable::print_statistics();
326 klassItable::print_statistics();
327 }
328 if (VerifyOops) {
329 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
330 }
331
332 print_bytecode_count();
333 if (PrintMallocStatistics) {
334 tty->print("allocation stats: ");
335 alloc_stats.print();
336 tty->cr();
337 }
338
339 if (PrintSystemDictionaryAtExit) {
340 SystemDictionary::print();
341 }
342
343 if (PrintBiasedLockingStatistics) {
344 BiasedLocking::print_counters();
345 }
346
347 #ifdef ENABLE_ZAP_DEAD_LOCALS
348 #ifdef COMPILER2
349 if (ZapDeadCompiledLocals) {
350 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
351 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
352 }
353 #endif // COMPILER2
354 #endif // ENABLE_ZAP_DEAD_LOCALS
355 // Native memory tracking data
356 if (PrintNMTStatistics) {
357 if (MemTracker::is_on()) {
358 BaselineTTYOutputer outputer(tty);
359 MemTracker::print_memory_usage(outputer, K, false);
360 } else {
361 tty->print_cr(MemTracker::reason());
362 }
363 }
364 }
365
366 #else // PRODUCT MODE STATISTICS
367
368 void print_statistics() {
369
370 if (CITime) {
371 CompileBroker::print_times();
372 }
373
374 if (PrintCodeCache) {
375 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
376 CodeCache::print();
377 }
378
379 if (PrintMethodFlushingStatistics) {
380 NMethodSweeper::print();
381 }
382
383 #ifdef COMPILER2
384 if (PrintPreciseBiasedLockingStatistics) {
385 OptoRuntime::print_named_counters();
386 }
387 #endif
388 if (PrintBiasedLockingStatistics) {
389 BiasedLocking::print_counters();
390 }
391
392 // Native memory tracking data
393 if (PrintNMTStatistics) {
394 if (MemTracker::is_on()) {
395 BaselineTTYOutputer outputer(tty);
396 MemTracker::print_memory_usage(outputer, K, false);
397 } else {
398 tty->print_cr(MemTracker::reason());
399 }
400 }
401 }
402
403 #endif
404
405
406 // Helper class for registering on_exit calls through JVM_OnExit
407
408 extern "C" {
409 typedef void (*__exit_proc)(void);
410 }
411
412 class ExitProc : public CHeapObj<mtInternal> {
413 private:
414 __exit_proc _proc;
415 // void (*_proc)(void);
416 ExitProc* _next;
417 public:
418 // ExitProc(void (*proc)(void)) {
419 ExitProc(__exit_proc proc) {
420 _proc = proc;
421 _next = NULL;
422 }
423 void evaluate() { _proc(); }
424 ExitProc* next() const { return _next; }
425 void set_next(ExitProc* next) { _next = next; }
426 };
427
428
429 // Linked list of registered on_exit procedures
430
431 static ExitProc* exit_procs = NULL;
432
433
434 extern "C" {
435 void register_on_exit_function(void (*func)(void)) {
436 ExitProc *entry = new ExitProc(func);
437 // Classic vm does not throw an exception in case the allocation failed,
438 if (entry != NULL) {
439 entry->set_next(exit_procs);
440 exit_procs = entry;
441 }
442 }
443 }
444
445 // Note: before_exit() can be executed only once, if more than one threads
446 // are trying to shutdown the VM at the same time, only one thread
447 // can run before_exit() and all other threads must wait.
448 void before_exit(JavaThread * thread) {
449 #define BEFORE_EXIT_NOT_RUN 0
450 #define BEFORE_EXIT_RUNNING 1
451 #define BEFORE_EXIT_DONE 2
452 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
453
454 // Note: don't use a Mutex to guard the entire before_exit(), as
455 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
456 // A CAS or OSMutex would work just fine but then we need to manipulate
457 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
458 // for synchronization.
459 { MutexLocker ml(BeforeExit_lock);
460 switch (_before_exit_status) {
461 case BEFORE_EXIT_NOT_RUN:
462 _before_exit_status = BEFORE_EXIT_RUNNING;
463 break;
464 case BEFORE_EXIT_RUNNING:
465 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
466 BeforeExit_lock->wait();
467 }
468 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
469 return;
470 case BEFORE_EXIT_DONE:
471 return;
472 }
473 }
474
475 // The only difference between this and Win32's _onexit procs is that
476 // this version is invoked before any threads get killed.
477 ExitProc* current = exit_procs;
478 while (current != NULL) {
479 ExitProc* next = current->next();
480 current->evaluate();
481 delete current;
482 current = next;
483 }
484
485 // Hang forever on exit if we're reporting an error.
486 if (ShowMessageBoxOnError && is_error_reported()) {
487 os::infinite_sleep();
488 }
489
490 // Terminate watcher thread - must before disenrolling any periodic task
491 if (PeriodicTask::num_tasks() > 0)
492 WatcherThread::stop();
493
494 // Print statistics gathered (profiling ...)
495 if (Arguments::has_profile()) {
496 FlatProfiler::disengage();
497 FlatProfiler::print(10);
498 }
499
500 // shut down the StatSampler task
501 StatSampler::disengage();
502 StatSampler::destroy();
503
504 // We do not need to explicitly stop concurrent GC threads because the
505 // JVM will be taken down at a safepoint when such threads are inactive --
506 // except for some concurrent G1 threads, see (comment in)
507 // Threads::destroy_vm().
508
509 // Print GC/heap related information.
510 if (PrintGCDetails) {
511 Universe::print();
512 AdaptiveSizePolicyOutput(0);
513 if (Verbose) {
514 ClassLoaderDataGraph::dump_on(gclog_or_tty);
515 }
516 }
517
518 if (PrintBytecodeHistogram) {
519 BytecodeHistogram::print();
520 }
521
522 if (JvmtiExport::should_post_thread_life()) {
523 JvmtiExport::post_thread_end(thread);
524 }
525
526
527 EventThreadEnd event;
528 if (event.should_commit()) {
529 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
530 event.commit();
531 }
532
533 // Always call even when there are not JVMTI environments yet, since environments
534 // may be attached late and JVMTI must track phases of VM execution
535 JvmtiExport::post_vm_death();
536 Threads::shutdown_vm_agents();
537
538 // Terminate the signal thread
539 // Note: we don't wait until it actually dies.
540 os::terminate_signal_thread();
541
542 print_statistics();
543 Universe::heap()->print_tracing_info();
544
545 { MutexLocker ml(BeforeExit_lock);
546 _before_exit_status = BEFORE_EXIT_DONE;
547 BeforeExit_lock->notify_all();
548 }
549
550 // Shutdown NMT before exit. Otherwise,
551 // it will run into trouble when system destroys static variables.
552 MemTracker::shutdown(MemTracker::NMT_normal);
553
554 #undef BEFORE_EXIT_NOT_RUN
555 #undef BEFORE_EXIT_RUNNING
556 #undef BEFORE_EXIT_DONE
557 }
558
559 void vm_exit(int code) {
560 Thread* thread = ThreadLocalStorage::is_initialized() ?
561 ThreadLocalStorage::get_thread_slow() : NULL;
562 if (thread == NULL) {
563 // we have serious problems -- just exit
564 vm_direct_exit(code);
565 }
566
567 if (VMThread::vm_thread() != NULL) {
568 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
569 VM_Exit op(code);
570 if (thread->is_Java_thread())
571 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
572 VMThread::execute(&op);
573 // should never reach here; but in case something wrong with VM Thread.
574 vm_direct_exit(code);
575 } else {
576 // VM thread is gone, just exit
577 vm_direct_exit(code);
578 }
579 ShouldNotReachHere();
580 }
581
582 void notify_vm_shutdown() {
583 // For now, just a dtrace probe.
584 #ifndef USDT2
585 HS_DTRACE_PROBE(hotspot, vm__shutdown);
586 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
587 #else /* USDT2 */
588 HOTSPOT_VM_SHUTDOWN();
589 #endif /* USDT2 */
590 }
591
592 void vm_direct_exit(int code) {
593 notify_vm_shutdown();
594 os::wait_for_keypress_at_exit();
595 ::exit(code);
596 }
597
598 void vm_perform_shutdown_actions() {
599 // Warning: do not call 'exit_globals()' here. All threads are still running.
600 // Calling 'exit_globals()' will disable thread-local-storage and cause all
601 // kinds of assertions to trigger in debug mode.
602 if (is_init_completed()) {
603 Thread* thread = ThreadLocalStorage::is_initialized() ?
604 ThreadLocalStorage::get_thread_slow() : NULL;
605 if (thread != NULL && thread->is_Java_thread()) {
606 // We are leaving the VM, set state to native (in case any OS exit
607 // handlers call back to the VM)
608 JavaThread* jt = (JavaThread*)thread;
609 // Must always be walkable or have no last_Java_frame when in
610 // thread_in_native
611 jt->frame_anchor()->make_walkable(jt);
612 jt->set_thread_state(_thread_in_native);
613 }
614 }
615 notify_vm_shutdown();
616 }
617
618 void vm_shutdown()
619 {
620 vm_perform_shutdown_actions();
621 os::wait_for_keypress_at_exit();
622 os::shutdown();
623 }
624
625 void vm_abort(bool dump_core) {
626 vm_perform_shutdown_actions();
627 os::wait_for_keypress_at_exit();
628 os::abort(dump_core);
629 ShouldNotReachHere();
630 }
631
632 void vm_notify_during_shutdown(const char* error, const char* message) {
633 if (error != NULL) {
634 tty->print_cr("Error occurred during initialization of VM");
635 tty->print("%s", error);
636 if (message != NULL) {
637 tty->print_cr(": %s", message);
638 }
639 else {
640 tty->cr();
641 }
642 }
643 if (ShowMessageBoxOnError && WizardMode) {
644 fatal("Error occurred during initialization of VM");
645 }
646 }
647
648 void vm_exit_during_initialization(Handle exception) {
649 tty->print_cr("Error occurred during initialization of VM");
650 // If there are exceptions on this thread it must be cleared
651 // first and here. Any future calls to EXCEPTION_MARK requires
652 // that no pending exceptions exist.
653 Thread *THREAD = Thread::current();
654 if (HAS_PENDING_EXCEPTION) {
655 CLEAR_PENDING_EXCEPTION;
656 }
657 java_lang_Throwable::print(exception, tty);
658 tty->cr();
659 java_lang_Throwable::print_stack_trace(exception(), tty);
660 tty->cr();
661 vm_notify_during_shutdown(NULL, NULL);
662
663 // Failure during initialization, we don't want to dump core
664 vm_abort(false);
665 }
666
667 void vm_exit_during_initialization(Symbol* ex, const char* message) {
668 ResourceMark rm;
669 vm_notify_during_shutdown(ex->as_C_string(), message);
670
671 // Failure during initialization, we don't want to dump core
672 vm_abort(false);
673 }
674
675 void vm_exit_during_initialization(const char* error, const char* message) {
676 vm_notify_during_shutdown(error, message);
677
678 // Failure during initialization, we don't want to dump core
679 vm_abort(false);
680 }
681
682 void vm_shutdown_during_initialization(const char* error, const char* message) {
683 vm_notify_during_shutdown(error, message);
684 vm_shutdown();
685 }
686
687 JDK_Version JDK_Version::_current;
688 const char* JDK_Version::_runtime_name;
689 const char* JDK_Version::_runtime_version;
690
691 void JDK_Version::initialize() {
692 jdk_version_info info;
693 assert(!_current.is_valid(), "Don't initialize twice");
694
695 void *lib_handle = os::native_java_library();
696 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
697 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
698
699 if (func == NULL) {
700 // JDK older than 1.6
701 _current._partially_initialized = true;
702 } else {
703 (*func)(&info, sizeof(info));
704
705 int major = JDK_VERSION_MAJOR(info.jdk_version);
706 int minor = JDK_VERSION_MINOR(info.jdk_version);
707 int micro = JDK_VERSION_MICRO(info.jdk_version);
708 int build = JDK_VERSION_BUILD(info.jdk_version);
709 if (major == 1 && minor > 4) {
710 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
711 major = minor;
712 minor = micro;
713 micro = 0;
714 }
715 _current = JDK_Version(major, minor, micro, info.update_version,
716 info.special_update_version, build,
717 info.thread_park_blocker == 1,
718 info.post_vm_init_hook_enabled == 1,
719 info.pending_list_uses_discovered_field == 1);
720 }
721 }
722
723 void JDK_Version::fully_initialize(
724 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
725 // This is only called when current is less than 1.6 and we've gotten
726 // far enough in the initialization to determine the exact version.
727 assert(major < 6, "not needed for JDK version >= 6");
728 assert(is_partially_initialized(), "must not initialize");
729 if (major < 5) {
730 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
731 micro = minor;
732 minor = major;
733 major = 1;
734 }
735 _current = JDK_Version(major, minor, micro, update);
736 }
737
738 void JDK_Version_init() {
739 JDK_Version::initialize();
740 }
741
742 static int64_t encode_jdk_version(const JDK_Version& v) {
743 return
744 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
745 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
746 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
747 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
748 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
749 ((int64_t)v.build_number() << (BitsPerByte * 0));
750 }
751
752 int JDK_Version::compare(const JDK_Version& other) const {
753 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
754 if (!is_partially_initialized() && other.is_partially_initialized()) {
755 return -(other.compare(*this)); // flip the comparators
756 }
757 assert(!other.is_partially_initialized(), "Not initialized yet");
758 if (is_partially_initialized()) {
759 assert(other.major_version() >= 6,
760 "Invalid JDK version comparison during initialization");
761 return -1;
762 } else {
763 uint64_t e = encode_jdk_version(*this);
764 uint64_t o = encode_jdk_version(other);
765 return (e > o) ? 1 : ((e == o) ? 0 : -1);
766 }
767 }
768
769 void JDK_Version::to_string(char* buffer, size_t buflen) const {
770 size_t index = 0;
771 if (!is_valid()) {
772 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
773 } else if (is_partially_initialized()) {
774 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
775 } else {
776 index += jio_snprintf(
777 &buffer[index], buflen - index, "%d.%d", _major, _minor);
778 if (_micro > 0) {
779 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
780 }
781 if (_update > 0) {
782 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
783 }
784 if (_special > 0) {
785 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
786 }
787 if (_build > 0) {
788 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
789 }
790 }
791 }