Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/java.cpp@6aa49042b101
src/share/vm/runtime/java.cpp
Thu, 19 Dec 2013 14:08:02 +0100
- author
- anoll
- date
- Thu, 19 Dec 2013 14:08:02 +0100
- changeset 6207
- 6aa49042b101
- parent 5987
- 5ccbab1c69f3
- child 6429
- 606acabe7b5c
- permissions
- -rw-r--r--
8025277: Add -XX: flag to print code cache sweeper statistics
Summary: New diagnostic flag prints statistics about the code cache sweeper
Reviewed-by: kvn
Contributed-by: tobi.hartmann@gmail.com
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 */
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
100 #ifndef USDT2
101 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
102 #endif /* !USDT2 */
104 #ifndef PRODUCT
106 // Statistics printing (method invocation histogram)
108 GrowableArray<Method*>* collected_invoked_methods;
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 }
117 GrowableArray<Method*>* collected_profiled_methods;
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 }
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 }
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 }
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);
186 int count = collected_profiled_methods->length();
187 int total_size = 0;
188 if (count > 0) {
189 for (int index = 0; index < count; index++) {
190 Method* m = collected_profiled_methods->at(index);
191 ttyLocker ttyl;
192 tty->print_cr("------------------------------------------------------------------------");
193 //m->print_name(tty);
194 m->print_invocation_count();
195 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
196 tty->cr();
197 // Dump data on parameters if any
198 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
199 tty->fill_to(2);
200 m->method_data()->parameters_type_data()->print_data_on(tty);
201 }
202 m->print_codes();
203 total_size += m->method_data()->size_in_bytes();
204 }
205 tty->print_cr("------------------------------------------------------------------------");
206 tty->print_cr("Total MDO size: %d bytes", total_size);
207 }
208 }
210 void print_bytecode_count() {
211 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
212 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
213 }
214 }
216 AllocStats alloc_stats;
220 // General statistics printing (profiling ...)
221 void print_statistics() {
222 #ifdef ASSERT
224 if (CountRuntimeCalls) {
225 extern Histogram *RuntimeHistogram;
226 RuntimeHistogram->print();
227 }
229 if (CountJNICalls) {
230 extern Histogram *JNIHistogram;
231 JNIHistogram->print();
232 }
234 if (CountJVMCalls) {
235 extern Histogram *JVMHistogram;
236 JVMHistogram->print();
237 }
239 #endif
241 if (MemProfiling) {
242 MemProfiler::disengage();
243 }
245 if (CITime) {
246 CompileBroker::print_times();
247 }
249 #ifdef COMPILER1
250 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
251 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
252 Runtime1::print_statistics();
253 Deoptimization::print_statistics();
254 SharedRuntime::print_statistics();
255 nmethod::print_statistics();
256 }
257 #endif /* COMPILER1 */
259 #ifdef COMPILER2
260 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
261 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
262 Compile::print_statistics();
263 #ifndef COMPILER1
264 Deoptimization::print_statistics();
265 nmethod::print_statistics();
266 SharedRuntime::print_statistics();
267 #endif //COMPILER1
268 os::print_statistics();
269 }
271 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
272 OptoRuntime::print_named_counters();
273 }
275 if (TimeLivenessAnalysis) {
276 MethodLiveness::print_times();
277 }
278 #ifdef ASSERT
279 if (CollectIndexSetStatistics) {
280 IndexSet::print_statistics();
281 }
282 #endif // ASSERT
283 #endif // COMPILER2
284 if (CountCompiledCalls) {
285 print_method_invocation_histogram();
286 }
287 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
288 print_method_profiling_data();
289 }
290 if (TimeCompiler) {
291 COMPILER2_PRESENT(Compile::print_timers();)
292 }
293 if (TimeCompilationPolicy) {
294 CompilationPolicy::policy()->print_time();
295 }
296 if (TimeOopMap) {
297 GenerateOopMap::print_time();
298 }
299 if (ProfilerCheckIntervals) {
300 PeriodicTask::print_intervals();
301 }
302 if (PrintSymbolTableSizeHistogram) {
303 SymbolTable::print_histogram();
304 }
305 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
306 BytecodeCounter::print();
307 }
308 if (PrintBytecodePairHistogram) {
309 BytecodePairHistogram::print();
310 }
312 if (PrintCodeCache) {
313 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
314 CodeCache::print();
315 }
317 if (PrintMethodFlushingStatistics) {
318 NMethodSweeper::print();
319 }
321 if (PrintCodeCache2) {
322 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
323 CodeCache::print_internals();
324 }
326 if (PrintClassStatistics) {
327 SystemDictionary::print_class_statistics();
328 }
329 if (PrintMethodStatistics) {
330 SystemDictionary::print_method_statistics();
331 }
333 if (PrintVtableStats) {
334 klassVtable::print_statistics();
335 klassItable::print_statistics();
336 }
337 if (VerifyOops) {
338 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
339 }
341 print_bytecode_count();
342 if (PrintMallocStatistics) {
343 tty->print("allocation stats: ");
344 alloc_stats.print();
345 tty->cr();
346 }
348 if (PrintSystemDictionaryAtExit) {
349 SystemDictionary::print();
350 }
352 if (PrintBiasedLockingStatistics) {
353 BiasedLocking::print_counters();
354 }
356 #ifdef ENABLE_ZAP_DEAD_LOCALS
357 #ifdef COMPILER2
358 if (ZapDeadCompiledLocals) {
359 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
360 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
361 }
362 #endif // COMPILER2
363 #endif // ENABLE_ZAP_DEAD_LOCALS
364 // Native memory tracking data
365 if (PrintNMTStatistics) {
366 if (MemTracker::is_on()) {
367 BaselineTTYOutputer outputer(tty);
368 MemTracker::print_memory_usage(outputer, K, false);
369 } else {
370 tty->print_cr(MemTracker::reason());
371 }
372 }
373 }
375 #else // PRODUCT MODE STATISTICS
377 void print_statistics() {
379 if (CITime) {
380 CompileBroker::print_times();
381 }
383 if (PrintCodeCache) {
384 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
385 CodeCache::print();
386 }
388 if (PrintMethodFlushingStatistics) {
389 NMethodSweeper::print();
390 }
392 #ifdef COMPILER2
393 if (PrintPreciseBiasedLockingStatistics) {
394 OptoRuntime::print_named_counters();
395 }
396 #endif
397 if (PrintBiasedLockingStatistics) {
398 BiasedLocking::print_counters();
399 }
401 // Native memory tracking data
402 if (PrintNMTStatistics) {
403 if (MemTracker::is_on()) {
404 BaselineTTYOutputer outputer(tty);
405 MemTracker::print_memory_usage(outputer, K, false);
406 } else {
407 tty->print_cr(MemTracker::reason());
408 }
409 }
410 }
412 #endif
415 // Helper class for registering on_exit calls through JVM_OnExit
417 extern "C" {
418 typedef void (*__exit_proc)(void);
419 }
421 class ExitProc : public CHeapObj<mtInternal> {
422 private:
423 __exit_proc _proc;
424 // void (*_proc)(void);
425 ExitProc* _next;
426 public:
427 // ExitProc(void (*proc)(void)) {
428 ExitProc(__exit_proc proc) {
429 _proc = proc;
430 _next = NULL;
431 }
432 void evaluate() { _proc(); }
433 ExitProc* next() const { return _next; }
434 void set_next(ExitProc* next) { _next = next; }
435 };
438 // Linked list of registered on_exit procedures
440 static ExitProc* exit_procs = NULL;
443 extern "C" {
444 void register_on_exit_function(void (*func)(void)) {
445 ExitProc *entry = new ExitProc(func);
446 // Classic vm does not throw an exception in case the allocation failed,
447 if (entry != NULL) {
448 entry->set_next(exit_procs);
449 exit_procs = entry;
450 }
451 }
452 }
454 // Note: before_exit() can be executed only once, if more than one threads
455 // are trying to shutdown the VM at the same time, only one thread
456 // can run before_exit() and all other threads must wait.
457 void before_exit(JavaThread * thread) {
458 #define BEFORE_EXIT_NOT_RUN 0
459 #define BEFORE_EXIT_RUNNING 1
460 #define BEFORE_EXIT_DONE 2
461 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
463 // Note: don't use a Mutex to guard the entire before_exit(), as
464 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
465 // A CAS or OSMutex would work just fine but then we need to manipulate
466 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
467 // for synchronization.
468 { MutexLocker ml(BeforeExit_lock);
469 switch (_before_exit_status) {
470 case BEFORE_EXIT_NOT_RUN:
471 _before_exit_status = BEFORE_EXIT_RUNNING;
472 break;
473 case BEFORE_EXIT_RUNNING:
474 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
475 BeforeExit_lock->wait();
476 }
477 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
478 return;
479 case BEFORE_EXIT_DONE:
480 return;
481 }
482 }
484 // The only difference between this and Win32's _onexit procs is that
485 // this version is invoked before any threads get killed.
486 ExitProc* current = exit_procs;
487 while (current != NULL) {
488 ExitProc* next = current->next();
489 current->evaluate();
490 delete current;
491 current = next;
492 }
494 // Hang forever on exit if we're reporting an error.
495 if (ShowMessageBoxOnError && is_error_reported()) {
496 os::infinite_sleep();
497 }
499 // Terminate watcher thread - must before disenrolling any periodic task
500 if (PeriodicTask::num_tasks() > 0)
501 WatcherThread::stop();
503 // Print statistics gathered (profiling ...)
504 if (Arguments::has_profile()) {
505 FlatProfiler::disengage();
506 FlatProfiler::print(10);
507 }
509 // shut down the StatSampler task
510 StatSampler::disengage();
511 StatSampler::destroy();
513 // We do not need to explicitly stop concurrent GC threads because the
514 // JVM will be taken down at a safepoint when such threads are inactive --
515 // except for some concurrent G1 threads, see (comment in)
516 // Threads::destroy_vm().
518 // Print GC/heap related information.
519 if (PrintGCDetails) {
520 Universe::print();
521 AdaptiveSizePolicyOutput(0);
522 if (Verbose) {
523 ClassLoaderDataGraph::dump_on(gclog_or_tty);
524 }
525 }
527 if (PrintBytecodeHistogram) {
528 BytecodeHistogram::print();
529 }
531 if (JvmtiExport::should_post_thread_life()) {
532 JvmtiExport::post_thread_end(thread);
533 }
536 EventThreadEnd event;
537 if (event.should_commit()) {
538 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
539 event.commit();
540 }
542 // Always call even when there are not JVMTI environments yet, since environments
543 // may be attached late and JVMTI must track phases of VM execution
544 JvmtiExport::post_vm_death();
545 Threads::shutdown_vm_agents();
547 // Terminate the signal thread
548 // Note: we don't wait until it actually dies.
549 os::terminate_signal_thread();
551 print_statistics();
552 Universe::heap()->print_tracing_info();
554 { MutexLocker ml(BeforeExit_lock);
555 _before_exit_status = BEFORE_EXIT_DONE;
556 BeforeExit_lock->notify_all();
557 }
559 // Shutdown NMT before exit. Otherwise,
560 // it will run into trouble when system destroys static variables.
561 MemTracker::shutdown(MemTracker::NMT_normal);
563 if (VerifyStringTableAtExit) {
564 int fail_cnt = 0;
565 {
566 MutexLocker ml(StringTable_lock);
567 fail_cnt = StringTable::verify_and_compare_entries();
568 }
570 if (fail_cnt != 0) {
571 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
572 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
573 }
574 }
576 #undef BEFORE_EXIT_NOT_RUN
577 #undef BEFORE_EXIT_RUNNING
578 #undef BEFORE_EXIT_DONE
579 }
581 void vm_exit(int code) {
582 Thread* thread = ThreadLocalStorage::is_initialized() ?
583 ThreadLocalStorage::get_thread_slow() : NULL;
584 if (thread == NULL) {
585 // we have serious problems -- just exit
586 vm_direct_exit(code);
587 }
589 if (VMThread::vm_thread() != NULL) {
590 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
591 VM_Exit op(code);
592 if (thread->is_Java_thread())
593 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
594 VMThread::execute(&op);
595 // should never reach here; but in case something wrong with VM Thread.
596 vm_direct_exit(code);
597 } else {
598 // VM thread is gone, just exit
599 vm_direct_exit(code);
600 }
601 ShouldNotReachHere();
602 }
604 void notify_vm_shutdown() {
605 // For now, just a dtrace probe.
606 #ifndef USDT2
607 HS_DTRACE_PROBE(hotspot, vm__shutdown);
608 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
609 #else /* USDT2 */
610 HOTSPOT_VM_SHUTDOWN();
611 #endif /* USDT2 */
612 }
614 void vm_direct_exit(int code) {
615 notify_vm_shutdown();
616 os::wait_for_keypress_at_exit();
617 ::exit(code);
618 }
620 void vm_perform_shutdown_actions() {
621 // Warning: do not call 'exit_globals()' here. All threads are still running.
622 // Calling 'exit_globals()' will disable thread-local-storage and cause all
623 // kinds of assertions to trigger in debug mode.
624 if (is_init_completed()) {
625 Thread* thread = ThreadLocalStorage::is_initialized() ?
626 ThreadLocalStorage::get_thread_slow() : NULL;
627 if (thread != NULL && thread->is_Java_thread()) {
628 // We are leaving the VM, set state to native (in case any OS exit
629 // handlers call back to the VM)
630 JavaThread* jt = (JavaThread*)thread;
631 // Must always be walkable or have no last_Java_frame when in
632 // thread_in_native
633 jt->frame_anchor()->make_walkable(jt);
634 jt->set_thread_state(_thread_in_native);
635 }
636 }
637 notify_vm_shutdown();
638 }
640 void vm_shutdown()
641 {
642 vm_perform_shutdown_actions();
643 os::wait_for_keypress_at_exit();
644 os::shutdown();
645 }
647 void vm_abort(bool dump_core) {
648 vm_perform_shutdown_actions();
649 os::wait_for_keypress_at_exit();
650 os::abort(dump_core);
651 ShouldNotReachHere();
652 }
654 void vm_notify_during_shutdown(const char* error, const char* message) {
655 if (error != NULL) {
656 tty->print_cr("Error occurred during initialization of VM");
657 tty->print("%s", error);
658 if (message != NULL) {
659 tty->print_cr(": %s", message);
660 }
661 else {
662 tty->cr();
663 }
664 }
665 if (ShowMessageBoxOnError && WizardMode) {
666 fatal("Error occurred during initialization of VM");
667 }
668 }
670 void vm_exit_during_initialization(Handle exception) {
671 tty->print_cr("Error occurred during initialization of VM");
672 // If there are exceptions on this thread it must be cleared
673 // first and here. Any future calls to EXCEPTION_MARK requires
674 // that no pending exceptions exist.
675 Thread *THREAD = Thread::current();
676 if (HAS_PENDING_EXCEPTION) {
677 CLEAR_PENDING_EXCEPTION;
678 }
679 java_lang_Throwable::print(exception, tty);
680 tty->cr();
681 java_lang_Throwable::print_stack_trace(exception(), tty);
682 tty->cr();
683 vm_notify_during_shutdown(NULL, NULL);
685 // Failure during initialization, we don't want to dump core
686 vm_abort(false);
687 }
689 void vm_exit_during_initialization(Symbol* ex, const char* message) {
690 ResourceMark rm;
691 vm_notify_during_shutdown(ex->as_C_string(), message);
693 // Failure during initialization, we don't want to dump core
694 vm_abort(false);
695 }
697 void vm_exit_during_initialization(const char* error, const char* message) {
698 vm_notify_during_shutdown(error, message);
700 // Failure during initialization, we don't want to dump core
701 vm_abort(false);
702 }
704 void vm_shutdown_during_initialization(const char* error, const char* message) {
705 vm_notify_during_shutdown(error, message);
706 vm_shutdown();
707 }
709 JDK_Version JDK_Version::_current;
710 const char* JDK_Version::_runtime_name;
711 const char* JDK_Version::_runtime_version;
713 void JDK_Version::initialize() {
714 jdk_version_info info;
715 assert(!_current.is_valid(), "Don't initialize twice");
717 void *lib_handle = os::native_java_library();
718 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
719 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
721 if (func == NULL) {
722 // JDK older than 1.6
723 _current._partially_initialized = true;
724 } else {
725 (*func)(&info, sizeof(info));
727 int major = JDK_VERSION_MAJOR(info.jdk_version);
728 int minor = JDK_VERSION_MINOR(info.jdk_version);
729 int micro = JDK_VERSION_MICRO(info.jdk_version);
730 int build = JDK_VERSION_BUILD(info.jdk_version);
731 if (major == 1 && minor > 4) {
732 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
733 major = minor;
734 minor = micro;
735 micro = 0;
736 }
737 _current = JDK_Version(major, minor, micro, info.update_version,
738 info.special_update_version, build,
739 info.thread_park_blocker == 1,
740 info.post_vm_init_hook_enabled == 1,
741 info.pending_list_uses_discovered_field == 1);
742 }
743 }
745 void JDK_Version::fully_initialize(
746 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
747 // This is only called when current is less than 1.6 and we've gotten
748 // far enough in the initialization to determine the exact version.
749 assert(major < 6, "not needed for JDK version >= 6");
750 assert(is_partially_initialized(), "must not initialize");
751 if (major < 5) {
752 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
753 micro = minor;
754 minor = major;
755 major = 1;
756 }
757 _current = JDK_Version(major, minor, micro, update);
758 }
760 void JDK_Version_init() {
761 JDK_Version::initialize();
762 }
764 static int64_t encode_jdk_version(const JDK_Version& v) {
765 return
766 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
767 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
768 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
769 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
770 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
771 ((int64_t)v.build_number() << (BitsPerByte * 0));
772 }
774 int JDK_Version::compare(const JDK_Version& other) const {
775 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
776 if (!is_partially_initialized() && other.is_partially_initialized()) {
777 return -(other.compare(*this)); // flip the comparators
778 }
779 assert(!other.is_partially_initialized(), "Not initialized yet");
780 if (is_partially_initialized()) {
781 assert(other.major_version() >= 6,
782 "Invalid JDK version comparison during initialization");
783 return -1;
784 } else {
785 uint64_t e = encode_jdk_version(*this);
786 uint64_t o = encode_jdk_version(other);
787 return (e > o) ? 1 : ((e == o) ? 0 : -1);
788 }
789 }
791 void JDK_Version::to_string(char* buffer, size_t buflen) const {
792 size_t index = 0;
793 if (!is_valid()) {
794 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
795 } else if (is_partially_initialized()) {
796 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
797 } else {
798 index += jio_snprintf(
799 &buffer[index], buflen - index, "%d.%d", _major, _minor);
800 if (_micro > 0) {
801 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
802 }
803 if (_update > 0) {
804 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
805 }
806 if (_special > 0) {
807 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
808 }
809 if (_build > 0) {
810 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
811 }
812 }
813 }
