Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/java.cpp@7ab5f6318694
src/share/vm/runtime/java.cpp
Sun, 01 Jan 2012 11:17:59 -0500
- author
- phh
- date
- Sun, 01 Jan 2012 11:17:59 -0500
- changeset 3378
- 7ab5f6318694
- parent 3202
- 436b4a3231bf
- child 3427
- 94ec88ca68e2
- permissions
- -rw-r--r--
7125934: Add a fast unordered timestamp capability to Hotspot on x86/x64
Summary: Add rdtsc detection and inline generation.
Reviewed-by: kamg, dholmes
Contributed-by: karen.kinnear@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 "utilities/dtrace.hpp"
61 #include "utilities/globalDefinitions.hpp"
62 #include "utilities/histogram.hpp"
63 #include "utilities/vmError.hpp"
64 #ifdef TARGET_ARCH_x86
65 # include "vm_version_x86.hpp"
66 #endif
67 #ifdef TARGET_ARCH_sparc
68 # include "vm_version_sparc.hpp"
69 #endif
70 #ifdef TARGET_ARCH_zero
71 # include "vm_version_zero.hpp"
72 #endif
73 #ifdef TARGET_ARCH_arm
74 # include "vm_version_arm.hpp"
75 #endif
76 #ifdef TARGET_ARCH_ppc
77 # include "vm_version_ppc.hpp"
78 #endif
79 #ifdef TARGET_OS_FAMILY_linux
80 # include "thread_linux.inline.hpp"
81 #endif
82 #ifdef TARGET_OS_FAMILY_solaris
83 # include "thread_solaris.inline.hpp"
84 #endif
85 #ifdef TARGET_OS_FAMILY_windows
86 # include "thread_windows.inline.hpp"
87 #endif
88 #ifdef TARGET_OS_FAMILY_bsd
89 # include "thread_bsd.inline.hpp"
90 #endif
91 #ifndef SERIALGC
92 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
93 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
94 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
95 #endif
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<methodOop>* collected_invoked_methods;
118 void collect_invoked_methods(methodOop m) {
119 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
120 collected_invoked_methods->push(m);
121 }
122 }
125 GrowableArray<methodOop>* collected_profiled_methods;
127 void collect_profiled_methods(methodOop m) {
128 methodHandle mh(Thread::current(), m);
129 if ((m->method_data() != NULL) &&
130 (PrintMethodData || CompilerOracle::should_print(mh))) {
131 collected_profiled_methods->push(m);
132 }
133 }
136 int compare_methods(methodOop* a, methodOop* b) {
137 // %%% there can be 32-bit overflow here
138 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
139 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
140 }
143 void print_method_invocation_histogram() {
144 ResourceMark rm;
145 HandleMark hm;
146 collected_invoked_methods = new GrowableArray<methodOop>(1024);
147 SystemDictionary::methods_do(collect_invoked_methods);
148 collected_invoked_methods->sort(&compare_methods);
149 //
150 tty->cr();
151 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
152 tty->cr();
153 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
154 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
155 synch_total = 0, nativ_total = 0, acces_total = 0;
156 for (int index = 0; index < collected_invoked_methods->length(); index++) {
157 methodOop m = collected_invoked_methods->at(index);
158 int c = m->invocation_count() + m->compiled_invocation_count();
159 if (c >= MethodHistogramCutoff) m->print_invocation_count();
160 int_total += m->invocation_count();
161 comp_total += m->compiled_invocation_count();
162 if (m->is_final()) final_total += c;
163 if (m->is_static()) static_total += c;
164 if (m->is_synchronized()) synch_total += c;
165 if (m->is_native()) nativ_total += c;
166 if (m->is_accessor()) acces_total += c;
167 }
168 tty->cr();
169 total = int_total + comp_total;
170 tty->print_cr("Invocations summary:");
171 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
172 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
173 tty->print_cr("\t%9d (100%%) total", total);
174 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
175 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
176 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
177 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
178 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
179 tty->cr();
180 SharedRuntime::print_call_statistics(comp_total);
181 }
183 void print_method_profiling_data() {
184 ResourceMark rm;
185 HandleMark hm;
186 collected_profiled_methods = new GrowableArray<methodOop>(1024);
187 SystemDictionary::methods_do(collect_profiled_methods);
188 collected_profiled_methods->sort(&compare_methods);
190 int count = collected_profiled_methods->length();
191 if (count > 0) {
192 for (int index = 0; index < count; index++) {
193 methodOop m = collected_profiled_methods->at(index);
194 ttyLocker ttyl;
195 tty->print_cr("------------------------------------------------------------------------");
196 //m->print_name(tty);
197 m->print_invocation_count();
198 tty->cr();
199 m->print_codes();
200 }
201 tty->print_cr("------------------------------------------------------------------------");
202 }
203 }
205 void print_bytecode_count() {
206 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
207 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
208 }
209 }
211 AllocStats alloc_stats;
215 // General statistics printing (profiling ...)
217 void print_statistics() {
219 #ifdef ASSERT
221 if (CountRuntimeCalls) {
222 extern Histogram *RuntimeHistogram;
223 RuntimeHistogram->print();
224 }
226 if (CountJNICalls) {
227 extern Histogram *JNIHistogram;
228 JNIHistogram->print();
229 }
231 if (CountJVMCalls) {
232 extern Histogram *JVMHistogram;
233 JVMHistogram->print();
234 }
236 #endif
238 if (MemProfiling) {
239 MemProfiler::disengage();
240 }
242 if (CITime) {
243 CompileBroker::print_times();
244 }
246 #ifdef COMPILER1
247 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
248 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
249 Runtime1::print_statistics();
250 Deoptimization::print_statistics();
251 SharedRuntime::print_statistics();
252 nmethod::print_statistics();
253 }
254 #endif /* COMPILER1 */
256 #ifdef COMPILER2
257 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
258 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
259 Compile::print_statistics();
260 #ifndef COMPILER1
261 Deoptimization::print_statistics();
262 nmethod::print_statistics();
263 SharedRuntime::print_statistics();
264 #endif //COMPILER1
265 os::print_statistics();
266 }
268 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
269 OptoRuntime::print_named_counters();
270 }
272 if (TimeLivenessAnalysis) {
273 MethodLiveness::print_times();
274 }
275 #ifdef ASSERT
276 if (CollectIndexSetStatistics) {
277 IndexSet::print_statistics();
278 }
279 #endif // ASSERT
280 #endif // COMPILER2
281 if (CountCompiledCalls) {
282 print_method_invocation_histogram();
283 }
284 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
285 print_method_profiling_data();
286 }
287 if (TimeCompiler) {
288 COMPILER2_PRESENT(Compile::print_timers();)
289 }
290 if (TimeCompilationPolicy) {
291 CompilationPolicy::policy()->print_time();
292 }
293 if (TimeOopMap) {
294 GenerateOopMap::print_time();
295 }
296 if (ProfilerCheckIntervals) {
297 PeriodicTask::print_intervals();
298 }
299 if (PrintSymbolTableSizeHistogram) {
300 SymbolTable::print_histogram();
301 }
302 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
303 BytecodeCounter::print();
304 }
305 if (PrintBytecodePairHistogram) {
306 BytecodePairHistogram::print();
307 }
309 if (PrintCodeCache) {
310 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
311 CodeCache::print();
312 }
314 if (PrintCodeCache2) {
315 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
316 CodeCache::print_internals();
317 }
319 if (PrintClassStatistics) {
320 SystemDictionary::print_class_statistics();
321 }
322 if (PrintMethodStatistics) {
323 SystemDictionary::print_method_statistics();
324 }
326 if (PrintVtableStats) {
327 klassVtable::print_statistics();
328 klassItable::print_statistics();
329 }
330 if (VerifyOops) {
331 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
332 }
334 print_bytecode_count();
335 if (PrintMallocStatistics) {
336 tty->print("allocation stats: ");
337 alloc_stats.print();
338 tty->cr();
339 }
341 if (PrintSystemDictionaryAtExit) {
342 SystemDictionary::print();
343 }
345 if (PrintBiasedLockingStatistics) {
346 BiasedLocking::print_counters();
347 }
349 #ifdef ENABLE_ZAP_DEAD_LOCALS
350 #ifdef COMPILER2
351 if (ZapDeadCompiledLocals) {
352 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
353 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
354 }
355 #endif // COMPILER2
356 #endif // ENABLE_ZAP_DEAD_LOCALS
357 }
359 #else // PRODUCT MODE STATISTICS
361 void print_statistics() {
363 if (CITime) {
364 CompileBroker::print_times();
365 }
366 #ifdef COMPILER2
367 if (PrintPreciseBiasedLockingStatistics) {
368 OptoRuntime::print_named_counters();
369 }
370 #endif
371 if (PrintBiasedLockingStatistics) {
372 BiasedLocking::print_counters();
373 }
374 }
376 #endif
379 // Helper class for registering on_exit calls through JVM_OnExit
381 extern "C" {
382 typedef void (*__exit_proc)(void);
383 }
385 class ExitProc : public CHeapObj {
386 private:
387 __exit_proc _proc;
388 // void (*_proc)(void);
389 ExitProc* _next;
390 public:
391 // ExitProc(void (*proc)(void)) {
392 ExitProc(__exit_proc proc) {
393 _proc = proc;
394 _next = NULL;
395 }
396 void evaluate() { _proc(); }
397 ExitProc* next() const { return _next; }
398 void set_next(ExitProc* next) { _next = next; }
399 };
402 // Linked list of registered on_exit procedures
404 static ExitProc* exit_procs = NULL;
407 extern "C" {
408 void register_on_exit_function(void (*func)(void)) {
409 ExitProc *entry = new ExitProc(func);
410 // Classic vm does not throw an exception in case the allocation failed,
411 if (entry != NULL) {
412 entry->set_next(exit_procs);
413 exit_procs = entry;
414 }
415 }
416 }
418 // Note: before_exit() can be executed only once, if more than one threads
419 // are trying to shutdown the VM at the same time, only one thread
420 // can run before_exit() and all other threads must wait.
421 void before_exit(JavaThread * thread) {
422 #define BEFORE_EXIT_NOT_RUN 0
423 #define BEFORE_EXIT_RUNNING 1
424 #define BEFORE_EXIT_DONE 2
425 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
427 // Note: don't use a Mutex to guard the entire before_exit(), as
428 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
429 // A CAS or OSMutex would work just fine but then we need to manipulate
430 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
431 // for synchronization.
432 { MutexLocker ml(BeforeExit_lock);
433 switch (_before_exit_status) {
434 case BEFORE_EXIT_NOT_RUN:
435 _before_exit_status = BEFORE_EXIT_RUNNING;
436 break;
437 case BEFORE_EXIT_RUNNING:
438 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
439 BeforeExit_lock->wait();
440 }
441 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
442 return;
443 case BEFORE_EXIT_DONE:
444 return;
445 }
446 }
448 // The only difference between this and Win32's _onexit procs is that
449 // this version is invoked before any threads get killed.
450 ExitProc* current = exit_procs;
451 while (current != NULL) {
452 ExitProc* next = current->next();
453 current->evaluate();
454 delete current;
455 current = next;
456 }
458 // Hang forever on exit if we're reporting an error.
459 if (ShowMessageBoxOnError && is_error_reported()) {
460 os::infinite_sleep();
461 }
463 // Terminate watcher thread - must before disenrolling any periodic task
464 if (PeriodicTask::num_tasks() > 0)
465 WatcherThread::stop();
467 // Print statistics gathered (profiling ...)
468 if (Arguments::has_profile()) {
469 FlatProfiler::disengage();
470 FlatProfiler::print(10);
471 }
473 // shut down the StatSampler task
474 StatSampler::disengage();
475 StatSampler::destroy();
477 // We do not need to explicitly stop concurrent GC threads because the
478 // JVM will be taken down at a safepoint when such threads are inactive --
479 // except for some concurrent G1 threads, see (comment in)
480 // Threads::destroy_vm().
482 // Print GC/heap related information.
483 if (PrintGCDetails) {
484 Universe::print();
485 AdaptiveSizePolicyOutput(0);
486 }
489 if (Arguments::has_alloc_profile()) {
490 HandleMark hm;
491 // Do one last collection to enumerate all the objects
492 // allocated since the last one.
493 Universe::heap()->collect(GCCause::_allocation_profiler);
494 AllocationProfiler::disengage();
495 AllocationProfiler::print(0);
496 }
498 if (PrintBytecodeHistogram) {
499 BytecodeHistogram::print();
500 }
502 if (JvmtiExport::should_post_thread_life()) {
503 JvmtiExport::post_thread_end(thread);
504 }
505 // Always call even when there are not JVMTI environments yet, since environments
506 // may be attached late and JVMTI must track phases of VM execution
507 JvmtiExport::post_vm_death();
508 Threads::shutdown_vm_agents();
510 // Terminate the signal thread
511 // Note: we don't wait until it actually dies.
512 os::terminate_signal_thread();
514 print_statistics();
515 Universe::heap()->print_tracing_info();
517 { MutexLocker ml(BeforeExit_lock);
518 _before_exit_status = BEFORE_EXIT_DONE;
519 BeforeExit_lock->notify_all();
520 }
522 #undef BEFORE_EXIT_NOT_RUN
523 #undef BEFORE_EXIT_RUNNING
524 #undef BEFORE_EXIT_DONE
525 }
527 void vm_exit(int code) {
528 Thread* thread = ThreadLocalStorage::is_initialized() ?
529 ThreadLocalStorage::get_thread_slow() : NULL;
530 if (thread == NULL) {
531 // we have serious problems -- just exit
532 vm_direct_exit(code);
533 }
535 if (VMThread::vm_thread() != NULL) {
536 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
537 VM_Exit op(code);
538 if (thread->is_Java_thread())
539 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
540 VMThread::execute(&op);
541 // should never reach here; but in case something wrong with VM Thread.
542 vm_direct_exit(code);
543 } else {
544 // VM thread is gone, just exit
545 vm_direct_exit(code);
546 }
547 ShouldNotReachHere();
548 }
550 void notify_vm_shutdown() {
551 // For now, just a dtrace probe.
552 #ifndef USDT2
553 HS_DTRACE_PROBE(hotspot, vm__shutdown);
554 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
555 #else /* USDT2 */
556 HOTSPOT_VM_SHUTDOWN();
557 #endif /* USDT2 */
558 }
560 void vm_direct_exit(int code) {
561 notify_vm_shutdown();
562 os::wait_for_keypress_at_exit();
563 ::exit(code);
564 }
566 void vm_perform_shutdown_actions() {
567 // Warning: do not call 'exit_globals()' here. All threads are still running.
568 // Calling 'exit_globals()' will disable thread-local-storage and cause all
569 // kinds of assertions to trigger in debug mode.
570 if (is_init_completed()) {
571 Thread* thread = ThreadLocalStorage::is_initialized() ?
572 ThreadLocalStorage::get_thread_slow() : NULL;
573 if (thread != NULL && thread->is_Java_thread()) {
574 // We are leaving the VM, set state to native (in case any OS exit
575 // handlers call back to the VM)
576 JavaThread* jt = (JavaThread*)thread;
577 // Must always be walkable or have no last_Java_frame when in
578 // thread_in_native
579 jt->frame_anchor()->make_walkable(jt);
580 jt->set_thread_state(_thread_in_native);
581 }
582 }
583 notify_vm_shutdown();
584 }
586 void vm_shutdown()
587 {
588 vm_perform_shutdown_actions();
589 os::wait_for_keypress_at_exit();
590 os::shutdown();
591 }
593 void vm_abort(bool dump_core) {
594 vm_perform_shutdown_actions();
595 os::wait_for_keypress_at_exit();
596 os::abort(dump_core);
597 ShouldNotReachHere();
598 }
600 void vm_notify_during_shutdown(const char* error, const char* message) {
601 if (error != NULL) {
602 tty->print_cr("Error occurred during initialization of VM");
603 tty->print("%s", error);
604 if (message != NULL) {
605 tty->print_cr(": %s", message);
606 }
607 else {
608 tty->cr();
609 }
610 }
611 if (ShowMessageBoxOnError && WizardMode) {
612 fatal("Error occurred during initialization of VM");
613 }
614 }
616 void vm_exit_during_initialization(Handle exception) {
617 tty->print_cr("Error occurred during initialization of VM");
618 // If there are exceptions on this thread it must be cleared
619 // first and here. Any future calls to EXCEPTION_MARK requires
620 // that no pending exceptions exist.
621 Thread *THREAD = Thread::current();
622 if (HAS_PENDING_EXCEPTION) {
623 CLEAR_PENDING_EXCEPTION;
624 }
625 java_lang_Throwable::print(exception, tty);
626 tty->cr();
627 java_lang_Throwable::print_stack_trace(exception(), tty);
628 tty->cr();
629 vm_notify_during_shutdown(NULL, NULL);
631 // Failure during initialization, we don't want to dump core
632 vm_abort(false);
633 }
635 void vm_exit_during_initialization(Symbol* ex, const char* message) {
636 ResourceMark rm;
637 vm_notify_during_shutdown(ex->as_C_string(), message);
639 // Failure during initialization, we don't want to dump core
640 vm_abort(false);
641 }
643 void vm_exit_during_initialization(const char* error, const char* message) {
644 vm_notify_during_shutdown(error, message);
646 // Failure during initialization, we don't want to dump core
647 vm_abort(false);
648 }
650 void vm_shutdown_during_initialization(const char* error, const char* message) {
651 vm_notify_during_shutdown(error, message);
652 vm_shutdown();
653 }
655 JDK_Version JDK_Version::_current;
657 void JDK_Version::initialize() {
658 jdk_version_info info;
659 assert(!_current.is_valid(), "Don't initialize twice");
661 void *lib_handle = os::native_java_library();
662 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
663 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
665 if (func == NULL) {
666 // JDK older than 1.6
667 _current._partially_initialized = true;
668 } else {
669 (*func)(&info, sizeof(info));
671 int major = JDK_VERSION_MAJOR(info.jdk_version);
672 int minor = JDK_VERSION_MINOR(info.jdk_version);
673 int micro = JDK_VERSION_MICRO(info.jdk_version);
674 int build = JDK_VERSION_BUILD(info.jdk_version);
675 if (major == 1 && minor > 4) {
676 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
677 major = minor;
678 minor = micro;
679 micro = 0;
680 }
681 _current = JDK_Version(major, minor, micro, info.update_version,
682 info.special_update_version, build,
683 info.thread_park_blocker == 1,
684 info.post_vm_init_hook_enabled == 1,
685 info.pending_list_uses_discovered_field == 1);
686 }
687 }
689 void JDK_Version::fully_initialize(
690 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
691 // This is only called when current is less than 1.6 and we've gotten
692 // far enough in the initialization to determine the exact version.
693 assert(major < 6, "not needed for JDK version >= 6");
694 assert(is_partially_initialized(), "must not initialize");
695 if (major < 5) {
696 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
697 micro = minor;
698 minor = major;
699 major = 1;
700 }
701 _current = JDK_Version(major, minor, micro, update);
702 }
704 void JDK_Version_init() {
705 JDK_Version::initialize();
706 }
708 static int64_t encode_jdk_version(const JDK_Version& v) {
709 return
710 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
711 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
712 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
713 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
714 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
715 ((int64_t)v.build_number() << (BitsPerByte * 0));
716 }
718 int JDK_Version::compare(const JDK_Version& other) const {
719 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
720 if (!is_partially_initialized() && other.is_partially_initialized()) {
721 return -(other.compare(*this)); // flip the comparators
722 }
723 assert(!other.is_partially_initialized(), "Not initialized yet");
724 if (is_partially_initialized()) {
725 assert(other.major_version() >= 6,
726 "Invalid JDK version comparison during initialization");
727 return -1;
728 } else {
729 uint64_t e = encode_jdk_version(*this);
730 uint64_t o = encode_jdk_version(other);
731 return (e > o) ? 1 : ((e == o) ? 0 : -1);
732 }
733 }
735 void JDK_Version::to_string(char* buffer, size_t buflen) const {
736 size_t index = 0;
737 if (!is_valid()) {
738 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
739 } else if (is_partially_initialized()) {
740 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
741 } else {
742 index += jio_snprintf(
743 &buffer[index], buflen - index, "%d.%d", _major, _minor);
744 if (_micro > 0) {
745 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
746 }
747 if (_update > 0) {
748 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
749 }
750 if (_special > 0) {
751 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
752 }
753 if (_build > 0) {
754 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
755 }
756 }
757 }
