Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/java.cpp@94ec88ca68e2
src/share/vm/runtime/java.cpp
Wed, 11 Jan 2012 17:34:02 -0500
- author
- phh
- date
- Wed, 11 Jan 2012 17:34:02 -0500
- changeset 3427
- 94ec88ca68e2
- parent 3202
- 436b4a3231bf
- child 3884
- f8de958e5b2c
- child 3900
- d2a62e0f25eb
- permissions
- -rw-r--r--
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
Summary: Added a nop tracing infrastructure, JFR makefile changes and other infrastructure used only by JFR.
Reviewed-by: acorn, sspitsyn
Contributed-by: markus.gronlund@oracle.com
1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compilerOracle.hpp"
32 #include "interpreter/bytecodeHistogram.hpp"
33 #include "memory/genCollectedHeap.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.hpp"
36 #include "oops/constantPoolOop.hpp"
37 #include "oops/generateOopMap.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceKlassKlass.hpp"
40 #include "oops/instanceOop.hpp"
41 #include "oops/methodOop.hpp"
42 #include "oops/objArrayOop.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/symbol.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "runtime/aprofiler.hpp"
47 #include "runtime/arguments.hpp"
48 #include "runtime/biasedLocking.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/fprofiler.hpp"
51 #include "runtime/init.hpp"
52 #include "runtime/interfaceSupport.hpp"
53 #include "runtime/java.hpp"
54 #include "runtime/memprofiler.hpp"
55 #include "runtime/sharedRuntime.hpp"
56 #include "runtime/statSampler.hpp"
57 #include "runtime/task.hpp"
58 #include "runtime/timer.hpp"
59 #include "runtime/vm_operations.hpp"
60 #include "trace/tracing.hpp"
61 #include "trace/traceEventTypes.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/globalDefinitions.hpp"
64 #include "utilities/histogram.hpp"
65 #include "utilities/vmError.hpp"
66 #ifdef TARGET_ARCH_x86
67 # include "vm_version_x86.hpp"
68 #endif
69 #ifdef TARGET_ARCH_sparc
70 # include "vm_version_sparc.hpp"
71 #endif
72 #ifdef TARGET_ARCH_zero
73 # include "vm_version_zero.hpp"
74 #endif
75 #ifdef TARGET_ARCH_arm
76 # include "vm_version_arm.hpp"
77 #endif
78 #ifdef TARGET_ARCH_ppc
79 # include "vm_version_ppc.hpp"
80 #endif
81 #ifdef TARGET_OS_FAMILY_linux
82 # include "thread_linux.inline.hpp"
83 #endif
84 #ifdef TARGET_OS_FAMILY_solaris
85 # include "thread_solaris.inline.hpp"
86 #endif
87 #ifdef TARGET_OS_FAMILY_windows
88 # include "thread_windows.inline.hpp"
89 #endif
90 #ifdef TARGET_OS_FAMILY_bsd
91 # include "thread_bsd.inline.hpp"
92 #endif
93 #ifndef SERIALGC
94 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
95 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
96 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
97 #endif
98 #ifdef COMPILER1
99 #include "c1/c1_Compiler.hpp"
100 #include "c1/c1_Runtime1.hpp"
101 #endif
102 #ifdef COMPILER2
103 #include "code/compiledIC.hpp"
104 #include "compiler/methodLiveness.hpp"
105 #include "opto/compile.hpp"
106 #include "opto/indexSet.hpp"
107 #include "opto/runtime.hpp"
108 #endif
110 #ifndef USDT2
111 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
112 #endif /* !USDT2 */
114 #ifndef PRODUCT
116 // Statistics printing (method invocation histogram)
118 GrowableArray<methodOop>* collected_invoked_methods;
120 void collect_invoked_methods(methodOop m) {
121 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
122 collected_invoked_methods->push(m);
123 }
124 }
127 GrowableArray<methodOop>* collected_profiled_methods;
129 void collect_profiled_methods(methodOop m) {
130 methodHandle mh(Thread::current(), m);
131 if ((m->method_data() != NULL) &&
132 (PrintMethodData || CompilerOracle::should_print(mh))) {
133 collected_profiled_methods->push(m);
134 }
135 }
138 int compare_methods(methodOop* a, methodOop* b) {
139 // %%% there can be 32-bit overflow here
140 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
141 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
142 }
145 void print_method_invocation_histogram() {
146 ResourceMark rm;
147 HandleMark hm;
148 collected_invoked_methods = new GrowableArray<methodOop>(1024);
149 SystemDictionary::methods_do(collect_invoked_methods);
150 collected_invoked_methods->sort(&compare_methods);
151 //
152 tty->cr();
153 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
154 tty->cr();
155 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
156 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
157 synch_total = 0, nativ_total = 0, acces_total = 0;
158 for (int index = 0; index < collected_invoked_methods->length(); index++) {
159 methodOop m = collected_invoked_methods->at(index);
160 int c = m->invocation_count() + m->compiled_invocation_count();
161 if (c >= MethodHistogramCutoff) m->print_invocation_count();
162 int_total += m->invocation_count();
163 comp_total += m->compiled_invocation_count();
164 if (m->is_final()) final_total += c;
165 if (m->is_static()) static_total += c;
166 if (m->is_synchronized()) synch_total += c;
167 if (m->is_native()) nativ_total += c;
168 if (m->is_accessor()) acces_total += c;
169 }
170 tty->cr();
171 total = int_total + comp_total;
172 tty->print_cr("Invocations summary:");
173 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
174 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
175 tty->print_cr("\t%9d (100%%) total", total);
176 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
177 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
178 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
179 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
180 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
181 tty->cr();
182 SharedRuntime::print_call_statistics(comp_total);
183 }
185 void print_method_profiling_data() {
186 ResourceMark rm;
187 HandleMark hm;
188 collected_profiled_methods = new GrowableArray<methodOop>(1024);
189 SystemDictionary::methods_do(collect_profiled_methods);
190 collected_profiled_methods->sort(&compare_methods);
192 int count = collected_profiled_methods->length();
193 if (count > 0) {
194 for (int index = 0; index < count; index++) {
195 methodOop m = collected_profiled_methods->at(index);
196 ttyLocker ttyl;
197 tty->print_cr("------------------------------------------------------------------------");
198 //m->print_name(tty);
199 m->print_invocation_count();
200 tty->cr();
201 m->print_codes();
202 }
203 tty->print_cr("------------------------------------------------------------------------");
204 }
205 }
207 void print_bytecode_count() {
208 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
209 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
210 }
211 }
213 AllocStats alloc_stats;
217 // General statistics printing (profiling ...)
219 void print_statistics() {
221 #ifdef ASSERT
223 if (CountRuntimeCalls) {
224 extern Histogram *RuntimeHistogram;
225 RuntimeHistogram->print();
226 }
228 if (CountJNICalls) {
229 extern Histogram *JNIHistogram;
230 JNIHistogram->print();
231 }
233 if (CountJVMCalls) {
234 extern Histogram *JVMHistogram;
235 JVMHistogram->print();
236 }
238 #endif
240 if (MemProfiling) {
241 MemProfiler::disengage();
242 }
244 if (CITime) {
245 CompileBroker::print_times();
246 }
248 #ifdef COMPILER1
249 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
250 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
251 Runtime1::print_statistics();
252 Deoptimization::print_statistics();
253 SharedRuntime::print_statistics();
254 nmethod::print_statistics();
255 }
256 #endif /* COMPILER1 */
258 #ifdef COMPILER2
259 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
260 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
261 Compile::print_statistics();
262 #ifndef COMPILER1
263 Deoptimization::print_statistics();
264 nmethod::print_statistics();
265 SharedRuntime::print_statistics();
266 #endif //COMPILER1
267 os::print_statistics();
268 }
270 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
271 OptoRuntime::print_named_counters();
272 }
274 if (TimeLivenessAnalysis) {
275 MethodLiveness::print_times();
276 }
277 #ifdef ASSERT
278 if (CollectIndexSetStatistics) {
279 IndexSet::print_statistics();
280 }
281 #endif // ASSERT
282 #endif // COMPILER2
283 if (CountCompiledCalls) {
284 print_method_invocation_histogram();
285 }
286 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
287 print_method_profiling_data();
288 }
289 if (TimeCompiler) {
290 COMPILER2_PRESENT(Compile::print_timers();)
291 }
292 if (TimeCompilationPolicy) {
293 CompilationPolicy::policy()->print_time();
294 }
295 if (TimeOopMap) {
296 GenerateOopMap::print_time();
297 }
298 if (ProfilerCheckIntervals) {
299 PeriodicTask::print_intervals();
300 }
301 if (PrintSymbolTableSizeHistogram) {
302 SymbolTable::print_histogram();
303 }
304 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
305 BytecodeCounter::print();
306 }
307 if (PrintBytecodePairHistogram) {
308 BytecodePairHistogram::print();
309 }
311 if (PrintCodeCache) {
312 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
313 CodeCache::print();
314 }
316 if (PrintCodeCache2) {
317 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
318 CodeCache::print_internals();
319 }
321 if (PrintClassStatistics) {
322 SystemDictionary::print_class_statistics();
323 }
324 if (PrintMethodStatistics) {
325 SystemDictionary::print_method_statistics();
326 }
328 if (PrintVtableStats) {
329 klassVtable::print_statistics();
330 klassItable::print_statistics();
331 }
332 if (VerifyOops) {
333 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
334 }
336 print_bytecode_count();
337 if (PrintMallocStatistics) {
338 tty->print("allocation stats: ");
339 alloc_stats.print();
340 tty->cr();
341 }
343 if (PrintSystemDictionaryAtExit) {
344 SystemDictionary::print();
345 }
347 if (PrintBiasedLockingStatistics) {
348 BiasedLocking::print_counters();
349 }
351 #ifdef ENABLE_ZAP_DEAD_LOCALS
352 #ifdef COMPILER2
353 if (ZapDeadCompiledLocals) {
354 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
355 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
356 }
357 #endif // COMPILER2
358 #endif // ENABLE_ZAP_DEAD_LOCALS
359 }
361 #else // PRODUCT MODE STATISTICS
363 void print_statistics() {
365 if (CITime) {
366 CompileBroker::print_times();
367 }
368 #ifdef COMPILER2
369 if (PrintPreciseBiasedLockingStatistics) {
370 OptoRuntime::print_named_counters();
371 }
372 #endif
373 if (PrintBiasedLockingStatistics) {
374 BiasedLocking::print_counters();
375 }
376 }
378 #endif
381 // Helper class for registering on_exit calls through JVM_OnExit
383 extern "C" {
384 typedef void (*__exit_proc)(void);
385 }
387 class ExitProc : public CHeapObj {
388 private:
389 __exit_proc _proc;
390 // void (*_proc)(void);
391 ExitProc* _next;
392 public:
393 // ExitProc(void (*proc)(void)) {
394 ExitProc(__exit_proc proc) {
395 _proc = proc;
396 _next = NULL;
397 }
398 void evaluate() { _proc(); }
399 ExitProc* next() const { return _next; }
400 void set_next(ExitProc* next) { _next = next; }
401 };
404 // Linked list of registered on_exit procedures
406 static ExitProc* exit_procs = NULL;
409 extern "C" {
410 void register_on_exit_function(void (*func)(void)) {
411 ExitProc *entry = new ExitProc(func);
412 // Classic vm does not throw an exception in case the allocation failed,
413 if (entry != NULL) {
414 entry->set_next(exit_procs);
415 exit_procs = entry;
416 }
417 }
418 }
420 // Note: before_exit() can be executed only once, if more than one threads
421 // are trying to shutdown the VM at the same time, only one thread
422 // can run before_exit() and all other threads must wait.
423 void before_exit(JavaThread * thread) {
424 #define BEFORE_EXIT_NOT_RUN 0
425 #define BEFORE_EXIT_RUNNING 1
426 #define BEFORE_EXIT_DONE 2
427 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
429 // Note: don't use a Mutex to guard the entire before_exit(), as
430 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
431 // A CAS or OSMutex would work just fine but then we need to manipulate
432 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
433 // for synchronization.
434 { MutexLocker ml(BeforeExit_lock);
435 switch (_before_exit_status) {
436 case BEFORE_EXIT_NOT_RUN:
437 _before_exit_status = BEFORE_EXIT_RUNNING;
438 break;
439 case BEFORE_EXIT_RUNNING:
440 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
441 BeforeExit_lock->wait();
442 }
443 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
444 return;
445 case BEFORE_EXIT_DONE:
446 return;
447 }
448 }
450 // The only difference between this and Win32's _onexit procs is that
451 // this version is invoked before any threads get killed.
452 ExitProc* current = exit_procs;
453 while (current != NULL) {
454 ExitProc* next = current->next();
455 current->evaluate();
456 delete current;
457 current = next;
458 }
460 // Hang forever on exit if we're reporting an error.
461 if (ShowMessageBoxOnError && is_error_reported()) {
462 os::infinite_sleep();
463 }
465 // Terminate watcher thread - must before disenrolling any periodic task
466 if (PeriodicTask::num_tasks() > 0)
467 WatcherThread::stop();
469 // Print statistics gathered (profiling ...)
470 if (Arguments::has_profile()) {
471 FlatProfiler::disengage();
472 FlatProfiler::print(10);
473 }
475 // shut down the StatSampler task
476 StatSampler::disengage();
477 StatSampler::destroy();
479 // We do not need to explicitly stop concurrent GC threads because the
480 // JVM will be taken down at a safepoint when such threads are inactive --
481 // except for some concurrent G1 threads, see (comment in)
482 // Threads::destroy_vm().
484 // Print GC/heap related information.
485 if (PrintGCDetails) {
486 Universe::print();
487 AdaptiveSizePolicyOutput(0);
488 }
491 if (Arguments::has_alloc_profile()) {
492 HandleMark hm;
493 // Do one last collection to enumerate all the objects
494 // allocated since the last one.
495 Universe::heap()->collect(GCCause::_allocation_profiler);
496 AllocationProfiler::disengage();
497 AllocationProfiler::print(0);
498 }
500 if (PrintBytecodeHistogram) {
501 BytecodeHistogram::print();
502 }
504 if (JvmtiExport::should_post_thread_life()) {
505 JvmtiExport::post_thread_end(thread);
506 }
508 EVENT_BEGIN(TraceEventThreadEnd, event);
509 EVENT_COMMIT(event,
510 EVENT_SET(event, javalangthread, java_lang_Thread::thread_id(thread->threadObj())));
512 // Always call even when there are not JVMTI environments yet, since environments
513 // may be attached late and JVMTI must track phases of VM execution
514 JvmtiExport::post_vm_death();
515 Threads::shutdown_vm_agents();
517 // Terminate the signal thread
518 // Note: we don't wait until it actually dies.
519 os::terminate_signal_thread();
521 print_statistics();
522 Universe::heap()->print_tracing_info();
524 { MutexLocker ml(BeforeExit_lock);
525 _before_exit_status = BEFORE_EXIT_DONE;
526 BeforeExit_lock->notify_all();
527 }
529 #undef BEFORE_EXIT_NOT_RUN
530 #undef BEFORE_EXIT_RUNNING
531 #undef BEFORE_EXIT_DONE
532 }
534 void vm_exit(int code) {
535 Thread* thread = ThreadLocalStorage::is_initialized() ?
536 ThreadLocalStorage::get_thread_slow() : NULL;
537 if (thread == NULL) {
538 // we have serious problems -- just exit
539 vm_direct_exit(code);
540 }
542 if (VMThread::vm_thread() != NULL) {
543 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
544 VM_Exit op(code);
545 if (thread->is_Java_thread())
546 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
547 VMThread::execute(&op);
548 // should never reach here; but in case something wrong with VM Thread.
549 vm_direct_exit(code);
550 } else {
551 // VM thread is gone, just exit
552 vm_direct_exit(code);
553 }
554 ShouldNotReachHere();
555 }
557 void notify_vm_shutdown() {
558 // For now, just a dtrace probe.
559 #ifndef USDT2
560 HS_DTRACE_PROBE(hotspot, vm__shutdown);
561 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
562 #else /* USDT2 */
563 HOTSPOT_VM_SHUTDOWN();
564 #endif /* USDT2 */
565 }
567 void vm_direct_exit(int code) {
568 notify_vm_shutdown();
569 os::wait_for_keypress_at_exit();
570 ::exit(code);
571 }
573 void vm_perform_shutdown_actions() {
574 // Warning: do not call 'exit_globals()' here. All threads are still running.
575 // Calling 'exit_globals()' will disable thread-local-storage and cause all
576 // kinds of assertions to trigger in debug mode.
577 if (is_init_completed()) {
578 Thread* thread = ThreadLocalStorage::is_initialized() ?
579 ThreadLocalStorage::get_thread_slow() : NULL;
580 if (thread != NULL && thread->is_Java_thread()) {
581 // We are leaving the VM, set state to native (in case any OS exit
582 // handlers call back to the VM)
583 JavaThread* jt = (JavaThread*)thread;
584 // Must always be walkable or have no last_Java_frame when in
585 // thread_in_native
586 jt->frame_anchor()->make_walkable(jt);
587 jt->set_thread_state(_thread_in_native);
588 }
589 }
590 notify_vm_shutdown();
591 }
593 void vm_shutdown()
594 {
595 vm_perform_shutdown_actions();
596 os::wait_for_keypress_at_exit();
597 os::shutdown();
598 }
600 void vm_abort(bool dump_core) {
601 vm_perform_shutdown_actions();
602 os::wait_for_keypress_at_exit();
603 os::abort(dump_core);
604 ShouldNotReachHere();
605 }
607 void vm_notify_during_shutdown(const char* error, const char* message) {
608 if (error != NULL) {
609 tty->print_cr("Error occurred during initialization of VM");
610 tty->print("%s", error);
611 if (message != NULL) {
612 tty->print_cr(": %s", message);
613 }
614 else {
615 tty->cr();
616 }
617 }
618 if (ShowMessageBoxOnError && WizardMode) {
619 fatal("Error occurred during initialization of VM");
620 }
621 }
623 void vm_exit_during_initialization(Handle exception) {
624 tty->print_cr("Error occurred during initialization of VM");
625 // If there are exceptions on this thread it must be cleared
626 // first and here. Any future calls to EXCEPTION_MARK requires
627 // that no pending exceptions exist.
628 Thread *THREAD = Thread::current();
629 if (HAS_PENDING_EXCEPTION) {
630 CLEAR_PENDING_EXCEPTION;
631 }
632 java_lang_Throwable::print(exception, tty);
633 tty->cr();
634 java_lang_Throwable::print_stack_trace(exception(), tty);
635 tty->cr();
636 vm_notify_during_shutdown(NULL, NULL);
638 // Failure during initialization, we don't want to dump core
639 vm_abort(false);
640 }
642 void vm_exit_during_initialization(Symbol* ex, const char* message) {
643 ResourceMark rm;
644 vm_notify_during_shutdown(ex->as_C_string(), message);
646 // Failure during initialization, we don't want to dump core
647 vm_abort(false);
648 }
650 void vm_exit_during_initialization(const char* error, const char* message) {
651 vm_notify_during_shutdown(error, message);
653 // Failure during initialization, we don't want to dump core
654 vm_abort(false);
655 }
657 void vm_shutdown_during_initialization(const char* error, const char* message) {
658 vm_notify_during_shutdown(error, message);
659 vm_shutdown();
660 }
662 JDK_Version JDK_Version::_current;
664 void JDK_Version::initialize() {
665 jdk_version_info info;
666 assert(!_current.is_valid(), "Don't initialize twice");
668 void *lib_handle = os::native_java_library();
669 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
670 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
672 if (func == NULL) {
673 // JDK older than 1.6
674 _current._partially_initialized = true;
675 } else {
676 (*func)(&info, sizeof(info));
678 int major = JDK_VERSION_MAJOR(info.jdk_version);
679 int minor = JDK_VERSION_MINOR(info.jdk_version);
680 int micro = JDK_VERSION_MICRO(info.jdk_version);
681 int build = JDK_VERSION_BUILD(info.jdk_version);
682 if (major == 1 && minor > 4) {
683 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
684 major = minor;
685 minor = micro;
686 micro = 0;
687 }
688 _current = JDK_Version(major, minor, micro, info.update_version,
689 info.special_update_version, build,
690 info.thread_park_blocker == 1,
691 info.post_vm_init_hook_enabled == 1,
692 info.pending_list_uses_discovered_field == 1);
693 }
694 }
696 void JDK_Version::fully_initialize(
697 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
698 // This is only called when current is less than 1.6 and we've gotten
699 // far enough in the initialization to determine the exact version.
700 assert(major < 6, "not needed for JDK version >= 6");
701 assert(is_partially_initialized(), "must not initialize");
702 if (major < 5) {
703 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
704 micro = minor;
705 minor = major;
706 major = 1;
707 }
708 _current = JDK_Version(major, minor, micro, update);
709 }
711 void JDK_Version_init() {
712 JDK_Version::initialize();
713 }
715 static int64_t encode_jdk_version(const JDK_Version& v) {
716 return
717 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
718 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
719 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
720 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
721 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
722 ((int64_t)v.build_number() << (BitsPerByte * 0));
723 }
725 int JDK_Version::compare(const JDK_Version& other) const {
726 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
727 if (!is_partially_initialized() && other.is_partially_initialized()) {
728 return -(other.compare(*this)); // flip the comparators
729 }
730 assert(!other.is_partially_initialized(), "Not initialized yet");
731 if (is_partially_initialized()) {
732 assert(other.major_version() >= 6,
733 "Invalid JDK version comparison during initialization");
734 return -1;
735 } else {
736 uint64_t e = encode_jdk_version(*this);
737 uint64_t o = encode_jdk_version(other);
738 return (e > o) ? 1 : ((e == o) ? 0 : -1);
739 }
740 }
742 void JDK_Version::to_string(char* buffer, size_t buflen) const {
743 size_t index = 0;
744 if (!is_valid()) {
745 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
746 } else if (is_partially_initialized()) {
747 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
748 } else {
749 index += jio_snprintf(
750 &buffer[index], buflen - index, "%d.%d", _major, _minor);
751 if (_micro > 0) {
752 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
753 }
754 if (_update > 0) {
755 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
756 }
757 if (_special > 0) {
758 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
759 }
760 if (_build > 0) {
761 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
762 }
763 }
764 }
