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src/share/vm/runtime/java.cpp@7ae4e26cb1e0
src/share/vm/runtime/java.cpp
Thu, 12 Oct 2017 21:27:07 +0800
- author
- aoqi
- date
- Thu, 12 Oct 2017 21:27:07 +0800
- changeset 7535
- 7ae4e26cb1e0
- parent 7074
- 833b0f92429a
- parent 6876
- 710a3c8b516e
- child 8604
- 04d83ba48607
- permissions
- -rw-r--r--
merge
1 /*
2 * Copyright (c) 1997, 2014, 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 /*
26 * This file has been modified by Loongson Technology in 2015. These
27 * modifications are Copyright (c) 2015 Loongson Technology, and are made
28 * available on the same license terms set forth above.
29 */
31 #include "precompiled.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/symbolTable.hpp"
34 #include "classfile/systemDictionary.hpp"
35 #include "code/codeCache.hpp"
36 #include "compiler/compileBroker.hpp"
37 #include "compiler/compilerOracle.hpp"
38 #include "interpreter/bytecodeHistogram.hpp"
39 #include "memory/genCollectedHeap.hpp"
40 #include "memory/oopFactory.hpp"
41 #include "memory/universe.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/generateOopMap.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceOop.hpp"
46 #include "oops/method.hpp"
47 #include "oops/objArrayOop.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "oops/symbol.hpp"
50 #include "prims/jvmtiExport.hpp"
51 #include "runtime/arguments.hpp"
52 #include "runtime/biasedLocking.hpp"
53 #include "runtime/compilationPolicy.hpp"
54 #include "runtime/fprofiler.hpp"
55 #include "runtime/init.hpp"
56 #include "runtime/interfaceSupport.hpp"
57 #include "runtime/java.hpp"
58 #include "runtime/memprofiler.hpp"
59 #include "runtime/sharedRuntime.hpp"
60 #include "runtime/statSampler.hpp"
61 #include "runtime/sweeper.hpp"
62 #include "runtime/task.hpp"
63 #include "runtime/thread.inline.hpp"
64 #include "runtime/timer.hpp"
65 #include "runtime/vm_operations.hpp"
66 #include "services/memTracker.hpp"
67 #include "trace/tracing.hpp"
68 #include "utilities/dtrace.hpp"
69 #include "utilities/globalDefinitions.hpp"
70 #include "utilities/histogram.hpp"
71 #include "utilities/macros.hpp"
72 #include "utilities/vmError.hpp"
73 #ifdef TARGET_ARCH_x86
74 # include "vm_version_x86.hpp"
75 #endif
76 #ifdef TARGET_ARCH_sparc
77 # include "vm_version_sparc.hpp"
78 #endif
79 #ifdef TARGET_ARCH_zero
80 # include "vm_version_zero.hpp"
81 #endif
82 #ifdef TARGET_ARCH_arm
83 # include "vm_version_arm.hpp"
84 #endif
85 #ifdef TARGET_ARCH_ppc
86 # include "vm_version_ppc.hpp"
87 #endif
88 #ifdef TARGET_ARCH_mips
89 # include "vm_version_mips.hpp"
90 #endif
91 #if INCLUDE_ALL_GCS
92 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
93 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
94 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
95 #endif // INCLUDE_ALL_GCS
96 #ifdef COMPILER1
97 #include "c1/c1_Compiler.hpp"
98 #include "c1/c1_Runtime1.hpp"
99 #endif
100 #ifdef COMPILER2
101 #include "code/compiledIC.hpp"
102 #include "compiler/methodLiveness.hpp"
103 #include "opto/compile.hpp"
104 #include "opto/indexSet.hpp"
105 #include "opto/runtime.hpp"
106 #endif
108 #ifndef USDT2
109 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
110 #endif /* !USDT2 */
112 #ifndef PRODUCT
114 // Statistics printing (method invocation histogram)
116 GrowableArray<Method*>* collected_invoked_methods;
118 void collect_invoked_methods(Method* m) {
119 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
120 collected_invoked_methods->push(m);
121 }
122 }
124 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
126 GrowableArray<Method*>* collected_profiled_methods;
128 void collect_profiled_methods(Method* m) {
129 Thread* thread = Thread::current();
130 // This HandleMark prevents a huge amount of handles from being added
131 // to the metadata_handles() array on the thread.
132 HandleMark hm(thread);
133 methodHandle mh(thread, m);
134 if ((m->method_data() != NULL) &&
135 (PrintMethodData || CompilerOracle::should_print(mh))) {
136 collected_profiled_methods->push(m);
137 }
138 }
141 int compare_methods(Method** a, Method** b) {
142 // %%% there can be 32-bit overflow here
143 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
144 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
145 }
148 void print_method_invocation_histogram() {
149 ResourceMark rm;
150 HandleMark hm;
151 collected_invoked_methods = new GrowableArray<Method*>(1024);
152 SystemDictionary::methods_do(collect_invoked_methods);
153 collected_invoked_methods->sort(&compare_methods);
154 //
155 tty->cr();
156 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
157 tty->cr();
158 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
159 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
160 synch_total = 0, nativ_total = 0, acces_total = 0;
161 for (int index = 0; index < collected_invoked_methods->length(); index++) {
162 Method* m = collected_invoked_methods->at(index);
163 int c = m->invocation_count() + m->compiled_invocation_count();
164 if (c >= MethodHistogramCutoff) m->print_invocation_count();
165 int_total += m->invocation_count();
166 comp_total += m->compiled_invocation_count();
167 if (m->is_final()) final_total += c;
168 if (m->is_static()) static_total += c;
169 if (m->is_synchronized()) synch_total += c;
170 if (m->is_native()) nativ_total += c;
171 if (m->is_accessor()) acces_total += c;
172 }
173 tty->cr();
174 total = int_total + comp_total;
175 tty->print_cr("Invocations summary:");
176 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
177 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
178 tty->print_cr("\t%9d (100%%) total", total);
179 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
180 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
181 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
182 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
183 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
184 tty->cr();
185 SharedRuntime::print_call_statistics(comp_total);
186 }
188 void print_method_profiling_data() {
189 ResourceMark rm;
190 HandleMark hm;
191 collected_profiled_methods = new GrowableArray<Method*>(1024);
192 SystemDictionary::methods_do(collect_profiled_methods);
193 collected_profiled_methods->sort(&compare_methods);
195 int count = collected_profiled_methods->length();
196 int total_size = 0;
197 if (count > 0) {
198 for (int index = 0; index < count; index++) {
199 Method* m = collected_profiled_methods->at(index);
200 ttyLocker ttyl;
201 tty->print_cr("------------------------------------------------------------------------");
202 //m->print_name(tty);
203 m->print_invocation_count();
204 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
205 tty->cr();
206 // Dump data on parameters if any
207 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
208 tty->fill_to(2);
209 m->method_data()->parameters_type_data()->print_data_on(tty);
210 }
211 m->print_codes();
212 total_size += m->method_data()->size_in_bytes();
213 }
214 tty->print_cr("------------------------------------------------------------------------");
215 tty->print_cr("Total MDO size: %d bytes", total_size);
216 }
217 }
219 void print_bytecode_count() {
220 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
221 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
222 }
223 }
225 AllocStats alloc_stats;
229 // General statistics printing (profiling ...)
230 void print_statistics() {
231 #ifdef ASSERT
233 if (CountRuntimeCalls) {
234 extern Histogram *RuntimeHistogram;
235 RuntimeHistogram->print();
236 }
238 if (CountJNICalls) {
239 extern Histogram *JNIHistogram;
240 JNIHistogram->print();
241 }
243 if (CountJVMCalls) {
244 extern Histogram *JVMHistogram;
245 JVMHistogram->print();
246 }
248 #endif
250 if (MemProfiling) {
251 MemProfiler::disengage();
252 }
254 if (CITime) {
255 CompileBroker::print_times();
256 }
258 #ifdef COMPILER1
259 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
260 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
261 Runtime1::print_statistics();
262 Deoptimization::print_statistics();
263 SharedRuntime::print_statistics();
264 nmethod::print_statistics();
265 }
266 #endif /* COMPILER1 */
268 #ifdef COMPILER2
269 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
270 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
271 Compile::print_statistics();
272 #ifndef COMPILER1
273 Deoptimization::print_statistics();
274 nmethod::print_statistics();
275 SharedRuntime::print_statistics();
276 #endif //COMPILER1
277 os::print_statistics();
278 }
280 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
281 OptoRuntime::print_named_counters();
282 }
284 if (TimeLivenessAnalysis) {
285 MethodLiveness::print_times();
286 }
287 #ifdef ASSERT
288 if (CollectIndexSetStatistics) {
289 IndexSet::print_statistics();
290 }
291 #endif // ASSERT
292 #endif // COMPILER2
293 if (CountCompiledCalls) {
294 print_method_invocation_histogram();
295 }
296 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
297 print_method_profiling_data();
298 }
299 if (TimeCompiler) {
300 COMPILER2_PRESENT(Compile::print_timers();)
301 }
302 if (TimeCompilationPolicy) {
303 CompilationPolicy::policy()->print_time();
304 }
305 if (TimeOopMap) {
306 GenerateOopMap::print_time();
307 }
308 if (ProfilerCheckIntervals) {
309 PeriodicTask::print_intervals();
310 }
311 if (PrintSymbolTableSizeHistogram) {
312 SymbolTable::print_histogram();
313 }
314 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
315 BytecodeCounter::print();
316 }
317 if (PrintBytecodePairHistogram) {
318 BytecodePairHistogram::print();
319 }
321 if (PrintCodeCache) {
322 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
323 CodeCache::print();
324 }
326 if (PrintMethodFlushingStatistics) {
327 NMethodSweeper::print();
328 }
330 if (PrintCodeCache2) {
331 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
332 CodeCache::print_internals();
333 }
335 if (PrintClassStatistics) {
336 SystemDictionary::print_class_statistics();
337 }
338 if (PrintMethodStatistics) {
339 SystemDictionary::print_method_statistics();
340 }
342 if (PrintVtableStats) {
343 klassVtable::print_statistics();
344 klassItable::print_statistics();
345 }
346 if (VerifyOops) {
347 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
348 }
350 print_bytecode_count();
351 if (PrintMallocStatistics) {
352 tty->print("allocation stats: ");
353 alloc_stats.print();
354 tty->cr();
355 }
357 if (PrintSystemDictionaryAtExit) {
358 SystemDictionary::print();
359 }
361 if (PrintBiasedLockingStatistics) {
362 BiasedLocking::print_counters();
363 }
365 #ifdef ENABLE_ZAP_DEAD_LOCALS
366 #ifdef COMPILER2
367 if (ZapDeadCompiledLocals) {
368 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
369 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
370 }
371 #endif // COMPILER2
372 #endif // ENABLE_ZAP_DEAD_LOCALS
373 // Native memory tracking data
374 if (PrintNMTStatistics) {
375 MemTracker::final_report(tty);
376 }
377 }
379 #else // PRODUCT MODE STATISTICS
381 void print_statistics() {
383 if (CITime) {
384 CompileBroker::print_times();
385 }
387 if (PrintCodeCache) {
388 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
389 CodeCache::print();
390 }
392 if (PrintMethodFlushingStatistics) {
393 NMethodSweeper::print();
394 }
396 #ifdef COMPILER2
397 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
398 OptoRuntime::print_named_counters();
399 }
400 #endif
401 if (PrintBiasedLockingStatistics) {
402 BiasedLocking::print_counters();
403 }
405 // Native memory tracking data
406 if (PrintNMTStatistics) {
407 MemTracker::final_report(tty);
408 }
409 }
411 #endif
414 // Helper class for registering on_exit calls through JVM_OnExit
416 extern "C" {
417 typedef void (*__exit_proc)(void);
418 }
420 class ExitProc : public CHeapObj<mtInternal> {
421 private:
422 __exit_proc _proc;
423 // void (*_proc)(void);
424 ExitProc* _next;
425 public:
426 // ExitProc(void (*proc)(void)) {
427 ExitProc(__exit_proc proc) {
428 _proc = proc;
429 _next = NULL;
430 }
431 void evaluate() { _proc(); }
432 ExitProc* next() const { return _next; }
433 void set_next(ExitProc* next) { _next = next; }
434 };
437 // Linked list of registered on_exit procedures
439 static ExitProc* exit_procs = NULL;
442 extern "C" {
443 void register_on_exit_function(void (*func)(void)) {
444 ExitProc *entry = new ExitProc(func);
445 // Classic vm does not throw an exception in case the allocation failed,
446 if (entry != NULL) {
447 entry->set_next(exit_procs);
448 exit_procs = entry;
449 }
450 }
451 }
453 // Note: before_exit() can be executed only once, if more than one threads
454 // are trying to shutdown the VM at the same time, only one thread
455 // can run before_exit() and all other threads must wait.
456 void before_exit(JavaThread * thread) {
457 #define BEFORE_EXIT_NOT_RUN 0
458 #define BEFORE_EXIT_RUNNING 1
459 #define BEFORE_EXIT_DONE 2
460 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
462 // Note: don't use a Mutex to guard the entire before_exit(), as
463 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
464 // A CAS or OSMutex would work just fine but then we need to manipulate
465 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
466 // for synchronization.
467 { MutexLocker ml(BeforeExit_lock);
468 switch (_before_exit_status) {
469 case BEFORE_EXIT_NOT_RUN:
470 _before_exit_status = BEFORE_EXIT_RUNNING;
471 break;
472 case BEFORE_EXIT_RUNNING:
473 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
474 BeforeExit_lock->wait();
475 }
476 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
477 return;
478 case BEFORE_EXIT_DONE:
479 return;
480 }
481 }
483 // The only difference between this and Win32's _onexit procs is that
484 // this version is invoked before any threads get killed.
485 ExitProc* current = exit_procs;
486 while (current != NULL) {
487 ExitProc* next = current->next();
488 current->evaluate();
489 delete current;
490 current = next;
491 }
493 // Hang forever on exit if we're reporting an error.
494 if (ShowMessageBoxOnError && is_error_reported()) {
495 os::infinite_sleep();
496 }
498 // Terminate watcher thread - must before disenrolling any periodic task
499 if (PeriodicTask::num_tasks() > 0)
500 WatcherThread::stop();
502 // Print statistics gathered (profiling ...)
503 if (Arguments::has_profile()) {
504 FlatProfiler::disengage();
505 FlatProfiler::print(10);
506 }
508 // shut down the StatSampler task
509 StatSampler::disengage();
510 StatSampler::destroy();
512 // Stop concurrent GC threads
513 Universe::heap()->stop();
515 // Print GC/heap related information.
516 if (PrintGCDetails) {
517 Universe::print();
518 AdaptiveSizePolicyOutput(0);
519 if (Verbose) {
520 ClassLoaderDataGraph::dump_on(gclog_or_tty);
521 }
522 }
524 if (PrintBytecodeHistogram) {
525 BytecodeHistogram::print();
526 }
528 if (JvmtiExport::should_post_thread_life()) {
529 JvmtiExport::post_thread_end(thread);
530 }
533 EventThreadEnd event;
534 if (event.should_commit()) {
535 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
536 event.commit();
537 }
539 // Always call even when there are not JVMTI environments yet, since environments
540 // may be attached late and JVMTI must track phases of VM execution
541 JvmtiExport::post_vm_death();
542 Threads::shutdown_vm_agents();
544 // Terminate the signal thread
545 // Note: we don't wait until it actually dies.
546 os::terminate_signal_thread();
548 print_statistics();
549 Universe::heap()->print_tracing_info();
551 { MutexLocker ml(BeforeExit_lock);
552 _before_exit_status = BEFORE_EXIT_DONE;
553 BeforeExit_lock->notify_all();
554 }
556 if (VerifyStringTableAtExit) {
557 int fail_cnt = 0;
558 {
559 MutexLocker ml(StringTable_lock);
560 fail_cnt = StringTable::verify_and_compare_entries();
561 }
563 if (fail_cnt != 0) {
564 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
565 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
566 }
567 }
569 #undef BEFORE_EXIT_NOT_RUN
570 #undef BEFORE_EXIT_RUNNING
571 #undef BEFORE_EXIT_DONE
572 }
574 void vm_exit(int code) {
575 Thread* thread = ThreadLocalStorage::is_initialized() ?
576 ThreadLocalStorage::get_thread_slow() : NULL;
577 if (thread == NULL) {
578 // we have serious problems -- just exit
579 vm_direct_exit(code);
580 }
582 if (VMThread::vm_thread() != NULL) {
583 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
584 VM_Exit op(code);
585 if (thread->is_Java_thread())
586 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
587 VMThread::execute(&op);
588 // should never reach here; but in case something wrong with VM Thread.
589 vm_direct_exit(code);
590 } else {
591 // VM thread is gone, just exit
592 vm_direct_exit(code);
593 }
594 ShouldNotReachHere();
595 }
597 void notify_vm_shutdown() {
598 // For now, just a dtrace probe.
599 #ifndef USDT2
600 HS_DTRACE_PROBE(hotspot, vm__shutdown);
601 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
602 #else /* USDT2 */
603 HOTSPOT_VM_SHUTDOWN();
604 #endif /* USDT2 */
605 }
607 void vm_direct_exit(int code) {
608 notify_vm_shutdown();
609 os::wait_for_keypress_at_exit();
610 ::exit(code);
611 }
613 void vm_perform_shutdown_actions() {
614 // Warning: do not call 'exit_globals()' here. All threads are still running.
615 // Calling 'exit_globals()' will disable thread-local-storage and cause all
616 // kinds of assertions to trigger in debug mode.
617 if (is_init_completed()) {
618 Thread* thread = ThreadLocalStorage::is_initialized() ?
619 ThreadLocalStorage::get_thread_slow() : NULL;
620 if (thread != NULL && thread->is_Java_thread()) {
621 // We are leaving the VM, set state to native (in case any OS exit
622 // handlers call back to the VM)
623 JavaThread* jt = (JavaThread*)thread;
624 // Must always be walkable or have no last_Java_frame when in
625 // thread_in_native
626 jt->frame_anchor()->make_walkable(jt);
627 jt->set_thread_state(_thread_in_native);
628 }
629 }
630 notify_vm_shutdown();
631 }
633 void vm_shutdown()
634 {
635 vm_perform_shutdown_actions();
636 os::wait_for_keypress_at_exit();
637 os::shutdown();
638 }
640 void vm_abort(bool dump_core) {
641 vm_perform_shutdown_actions();
642 os::wait_for_keypress_at_exit();
643 os::abort(dump_core);
644 ShouldNotReachHere();
645 }
647 void vm_notify_during_shutdown(const char* error, const char* message) {
648 if (error != NULL) {
649 tty->print_cr("Error occurred during initialization of VM");
650 tty->print("%s", error);
651 if (message != NULL) {
652 tty->print_cr(": %s", message);
653 }
654 else {
655 tty->cr();
656 }
657 }
658 if (ShowMessageBoxOnError && WizardMode) {
659 fatal("Error occurred during initialization of VM");
660 }
661 }
663 void vm_exit_during_initialization(Handle exception) {
664 tty->print_cr("Error occurred during initialization of VM");
665 // If there are exceptions on this thread it must be cleared
666 // first and here. Any future calls to EXCEPTION_MARK requires
667 // that no pending exceptions exist.
668 Thread *THREAD = Thread::current();
669 if (HAS_PENDING_EXCEPTION) {
670 CLEAR_PENDING_EXCEPTION;
671 }
672 java_lang_Throwable::print(exception, tty);
673 tty->cr();
674 java_lang_Throwable::print_stack_trace(exception(), tty);
675 tty->cr();
676 vm_notify_during_shutdown(NULL, NULL);
678 // Failure during initialization, we don't want to dump core
679 vm_abort(false);
680 }
682 void vm_exit_during_initialization(Symbol* ex, const char* message) {
683 ResourceMark rm;
684 vm_notify_during_shutdown(ex->as_C_string(), message);
686 // Failure during initialization, we don't want to dump core
687 vm_abort(false);
688 }
690 void vm_exit_during_initialization(const char* error, const char* message) {
691 vm_notify_during_shutdown(error, message);
693 // Failure during initialization, we don't want to dump core
694 vm_abort(false);
695 }
697 void vm_shutdown_during_initialization(const char* error, const char* message) {
698 vm_notify_during_shutdown(error, message);
699 vm_shutdown();
700 }
702 JDK_Version JDK_Version::_current;
703 const char* JDK_Version::_runtime_name;
704 const char* JDK_Version::_runtime_version;
706 void JDK_Version::initialize() {
707 jdk_version_info info;
708 assert(!_current.is_valid(), "Don't initialize twice");
710 void *lib_handle = os::native_java_library();
711 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
712 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
714 if (func == NULL) {
715 // JDK older than 1.6
716 _current._partially_initialized = true;
717 } else {
718 (*func)(&info, sizeof(info));
720 int major = JDK_VERSION_MAJOR(info.jdk_version);
721 int minor = JDK_VERSION_MINOR(info.jdk_version);
722 int micro = JDK_VERSION_MICRO(info.jdk_version);
723 int build = JDK_VERSION_BUILD(info.jdk_version);
724 if (major == 1 && minor > 4) {
725 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
726 major = minor;
727 minor = micro;
728 micro = 0;
729 }
730 _current = JDK_Version(major, minor, micro, info.update_version,
731 info.special_update_version, build,
732 info.thread_park_blocker == 1,
733 info.post_vm_init_hook_enabled == 1,
734 info.pending_list_uses_discovered_field == 1);
735 }
736 }
738 void JDK_Version::fully_initialize(
739 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
740 // This is only called when current is less than 1.6 and we've gotten
741 // far enough in the initialization to determine the exact version.
742 assert(major < 6, "not needed for JDK version >= 6");
743 assert(is_partially_initialized(), "must not initialize");
744 if (major < 5) {
745 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
746 micro = minor;
747 minor = major;
748 major = 1;
749 }
750 _current = JDK_Version(major, minor, micro, update);
751 }
753 void JDK_Version_init() {
754 JDK_Version::initialize();
755 }
757 static int64_t encode_jdk_version(const JDK_Version& v) {
758 return
759 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
760 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
761 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
762 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
763 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
764 ((int64_t)v.build_number() << (BitsPerByte * 0));
765 }
767 int JDK_Version::compare(const JDK_Version& other) const {
768 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
769 if (!is_partially_initialized() && other.is_partially_initialized()) {
770 return -(other.compare(*this)); // flip the comparators
771 }
772 assert(!other.is_partially_initialized(), "Not initialized yet");
773 if (is_partially_initialized()) {
774 assert(other.major_version() >= 6,
775 "Invalid JDK version comparison during initialization");
776 return -1;
777 } else {
778 uint64_t e = encode_jdk_version(*this);
779 uint64_t o = encode_jdk_version(other);
780 return (e > o) ? 1 : ((e == o) ? 0 : -1);
781 }
782 }
784 void JDK_Version::to_string(char* buffer, size_t buflen) const {
785 size_t index = 0;
786 if (!is_valid()) {
787 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
788 } else if (is_partially_initialized()) {
789 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
790 } else {
791 index += jio_snprintf(
792 &buffer[index], buflen - index, "%d.%d", _major, _minor);
793 if (_micro > 0) {
794 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
795 }
796 if (_update > 0) {
797 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
798 }
799 if (_special > 0) {
800 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
801 }
802 if (_build > 0) {
803 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
804 }
805 }
806 }
