Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/java.cpp@c760f78e0a53
src/share/vm/runtime/java.cpp
Wed, 01 Dec 2010 15:04:06 +0100
- author
- stefank
- date
- Wed, 01 Dec 2010 15:04:06 +0100
- changeset 2325
- c760f78e0a53
- parent 2314
- f95d63e2154a
- child 2419
- 0eb90baf1b69
- permissions
- -rw-r--r--
7003125: precompiled.hpp is included when precompiled headers are not used
Summary: Added an ifndef DONT_USE_PRECOMPILED_HEADER to precompiled.hpp. Set up DONT_USE_PRECOMPILED_HEADER when compiling with Sun Studio or when the user specifies USE_PRECOMPILED_HEADER=0. Fixed broken include dependencies.
Reviewed-by: coleenp, kvn
1 /*
2 * Copyright (c) 1997, 2010, 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/symbolOop.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_OS_FAMILY_linux
74 # include "thread_linux.inline.hpp"
75 #endif
76 #ifdef TARGET_OS_FAMILY_solaris
77 # include "thread_solaris.inline.hpp"
78 #endif
79 #ifdef TARGET_OS_FAMILY_windows
80 # include "thread_windows.inline.hpp"
81 #endif
82 #ifndef SERIALGC
83 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
84 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
85 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
86 #endif
87 #ifdef COMPILER1
88 #include "c1/c1_Compiler.hpp"
89 #include "c1/c1_Runtime1.hpp"
90 #endif
91 #ifdef COMPILER2
92 #include "code/compiledIC.hpp"
93 #include "compiler/methodLiveness.hpp"
94 #include "opto/compile.hpp"
95 #include "opto/indexSet.hpp"
96 #include "opto/runtime.hpp"
97 #endif
99 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
101 #ifndef PRODUCT
103 // Statistics printing (method invocation histogram)
105 GrowableArray<methodOop>* collected_invoked_methods;
107 void collect_invoked_methods(methodOop m) {
108 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
109 collected_invoked_methods->push(m);
110 }
111 }
114 GrowableArray<methodOop>* collected_profiled_methods;
116 void collect_profiled_methods(methodOop m) {
117 methodHandle mh(Thread::current(), m);
118 if ((m->method_data() != NULL) &&
119 (PrintMethodData || CompilerOracle::should_print(mh))) {
120 collected_profiled_methods->push(m);
121 }
122 }
125 int compare_methods(methodOop* a, methodOop* b) {
126 // %%% there can be 32-bit overflow here
127 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
128 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
129 }
132 void print_method_invocation_histogram() {
133 ResourceMark rm;
134 HandleMark hm;
135 collected_invoked_methods = new GrowableArray<methodOop>(1024);
136 SystemDictionary::methods_do(collect_invoked_methods);
137 collected_invoked_methods->sort(&compare_methods);
138 //
139 tty->cr();
140 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
141 tty->cr();
142 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
143 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
144 synch_total = 0, nativ_total = 0, acces_total = 0;
145 for (int index = 0; index < collected_invoked_methods->length(); index++) {
146 methodOop m = collected_invoked_methods->at(index);
147 int c = m->invocation_count() + m->compiled_invocation_count();
148 if (c >= MethodHistogramCutoff) m->print_invocation_count();
149 int_total += m->invocation_count();
150 comp_total += m->compiled_invocation_count();
151 if (m->is_final()) final_total += c;
152 if (m->is_static()) static_total += c;
153 if (m->is_synchronized()) synch_total += c;
154 if (m->is_native()) nativ_total += c;
155 if (m->is_accessor()) acces_total += c;
156 }
157 tty->cr();
158 total = int_total + comp_total;
159 tty->print_cr("Invocations summary:");
160 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
161 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
162 tty->print_cr("\t%9d (100%%) total", total);
163 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
164 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
165 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
166 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
167 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
168 tty->cr();
169 SharedRuntime::print_call_statistics(comp_total);
170 }
172 void print_method_profiling_data() {
173 ResourceMark rm;
174 HandleMark hm;
175 collected_profiled_methods = new GrowableArray<methodOop>(1024);
176 SystemDictionary::methods_do(collect_profiled_methods);
177 collected_profiled_methods->sort(&compare_methods);
179 int count = collected_profiled_methods->length();
180 if (count > 0) {
181 for (int index = 0; index < count; index++) {
182 methodOop m = collected_profiled_methods->at(index);
183 ttyLocker ttyl;
184 tty->print_cr("------------------------------------------------------------------------");
185 //m->print_name(tty);
186 m->print_invocation_count();
187 tty->cr();
188 m->print_codes();
189 }
190 tty->print_cr("------------------------------------------------------------------------");
191 }
192 }
194 void print_bytecode_count() {
195 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
196 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
197 }
198 }
200 AllocStats alloc_stats;
204 // General statistics printing (profiling ...)
206 void print_statistics() {
208 #ifdef ASSERT
210 if (CountRuntimeCalls) {
211 extern Histogram *RuntimeHistogram;
212 RuntimeHistogram->print();
213 }
215 if (CountJNICalls) {
216 extern Histogram *JNIHistogram;
217 JNIHistogram->print();
218 }
220 if (CountJVMCalls) {
221 extern Histogram *JVMHistogram;
222 JVMHistogram->print();
223 }
225 #endif
227 if (MemProfiling) {
228 MemProfiler::disengage();
229 }
231 if (CITime) {
232 CompileBroker::print_times();
233 }
235 #ifdef COMPILER1
236 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
237 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
238 Runtime1::print_statistics();
239 Deoptimization::print_statistics();
240 nmethod::print_statistics();
241 }
242 #endif /* COMPILER1 */
244 #ifdef COMPILER2
245 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
246 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
247 Compile::print_statistics();
248 #ifndef COMPILER1
249 Deoptimization::print_statistics();
250 nmethod::print_statistics();
251 #endif //COMPILER1
252 SharedRuntime::print_statistics();
253 os::print_statistics();
254 }
256 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
257 OptoRuntime::print_named_counters();
258 }
260 if (TimeLivenessAnalysis) {
261 MethodLiveness::print_times();
262 }
263 #ifdef ASSERT
264 if (CollectIndexSetStatistics) {
265 IndexSet::print_statistics();
266 }
267 #endif // ASSERT
268 #endif // COMPILER2
269 if (CountCompiledCalls) {
270 print_method_invocation_histogram();
271 }
272 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
273 print_method_profiling_data();
274 }
275 if (TimeCompiler) {
276 COMPILER2_PRESENT(Compile::print_timers();)
277 }
278 if (TimeCompilationPolicy) {
279 CompilationPolicy::policy()->print_time();
280 }
281 if (TimeOopMap) {
282 GenerateOopMap::print_time();
283 }
284 if (ProfilerCheckIntervals) {
285 PeriodicTask::print_intervals();
286 }
287 if (PrintSymbolTableSizeHistogram) {
288 SymbolTable::print_histogram();
289 }
290 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
291 BytecodeCounter::print();
292 }
293 if (PrintBytecodePairHistogram) {
294 BytecodePairHistogram::print();
295 }
297 if (PrintCodeCache) {
298 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
299 CodeCache::print();
300 }
302 if (PrintCodeCache2) {
303 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
304 CodeCache::print_internals();
305 }
307 if (PrintClassStatistics) {
308 SystemDictionary::print_class_statistics();
309 }
310 if (PrintMethodStatistics) {
311 SystemDictionary::print_method_statistics();
312 }
314 if (PrintVtableStats) {
315 klassVtable::print_statistics();
316 klassItable::print_statistics();
317 }
318 if (VerifyOops) {
319 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
320 }
322 print_bytecode_count();
323 if (WizardMode) {
324 tty->print("allocation stats: ");
325 alloc_stats.print();
326 tty->cr();
327 }
329 if (PrintSystemDictionaryAtExit) {
330 SystemDictionary::print();
331 }
333 if (PrintBiasedLockingStatistics) {
334 BiasedLocking::print_counters();
335 }
337 #ifdef ENABLE_ZAP_DEAD_LOCALS
338 #ifdef COMPILER2
339 if (ZapDeadCompiledLocals) {
340 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
341 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
342 }
343 #endif // COMPILER2
344 #endif // ENABLE_ZAP_DEAD_LOCALS
345 }
347 #else // PRODUCT MODE STATISTICS
349 void print_statistics() {
351 if (CITime) {
352 CompileBroker::print_times();
353 }
354 #ifdef COMPILER2
355 if (PrintPreciseBiasedLockingStatistics) {
356 OptoRuntime::print_named_counters();
357 }
358 #endif
359 if (PrintBiasedLockingStatistics) {
360 BiasedLocking::print_counters();
361 }
362 }
364 #endif
367 // Helper class for registering on_exit calls through JVM_OnExit
369 extern "C" {
370 typedef void (*__exit_proc)(void);
371 }
373 class ExitProc : public CHeapObj {
374 private:
375 __exit_proc _proc;
376 // void (*_proc)(void);
377 ExitProc* _next;
378 public:
379 // ExitProc(void (*proc)(void)) {
380 ExitProc(__exit_proc proc) {
381 _proc = proc;
382 _next = NULL;
383 }
384 void evaluate() { _proc(); }
385 ExitProc* next() const { return _next; }
386 void set_next(ExitProc* next) { _next = next; }
387 };
390 // Linked list of registered on_exit procedures
392 static ExitProc* exit_procs = NULL;
395 extern "C" {
396 void register_on_exit_function(void (*func)(void)) {
397 ExitProc *entry = new ExitProc(func);
398 // Classic vm does not throw an exception in case the allocation failed,
399 if (entry != NULL) {
400 entry->set_next(exit_procs);
401 exit_procs = entry;
402 }
403 }
404 }
406 // Note: before_exit() can be executed only once, if more than one threads
407 // are trying to shutdown the VM at the same time, only one thread
408 // can run before_exit() and all other threads must wait.
409 void before_exit(JavaThread * thread) {
410 #define BEFORE_EXIT_NOT_RUN 0
411 #define BEFORE_EXIT_RUNNING 1
412 #define BEFORE_EXIT_DONE 2
413 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
415 // Note: don't use a Mutex to guard the entire before_exit(), as
416 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
417 // A CAS or OSMutex would work just fine but then we need to manipulate
418 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
419 // for synchronization.
420 { MutexLocker ml(BeforeExit_lock);
421 switch (_before_exit_status) {
422 case BEFORE_EXIT_NOT_RUN:
423 _before_exit_status = BEFORE_EXIT_RUNNING;
424 break;
425 case BEFORE_EXIT_RUNNING:
426 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
427 BeforeExit_lock->wait();
428 }
429 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
430 return;
431 case BEFORE_EXIT_DONE:
432 return;
433 }
434 }
436 // The only difference between this and Win32's _onexit procs is that
437 // this version is invoked before any threads get killed.
438 ExitProc* current = exit_procs;
439 while (current != NULL) {
440 ExitProc* next = current->next();
441 current->evaluate();
442 delete current;
443 current = next;
444 }
446 // Hang forever on exit if we're reporting an error.
447 if (ShowMessageBoxOnError && is_error_reported()) {
448 os::infinite_sleep();
449 }
451 // Terminate watcher thread - must before disenrolling any periodic task
452 if (PeriodicTask::num_tasks() > 0)
453 WatcherThread::stop();
455 // Print statistics gathered (profiling ...)
456 if (Arguments::has_profile()) {
457 FlatProfiler::disengage();
458 FlatProfiler::print(10);
459 }
461 // shut down the StatSampler task
462 StatSampler::disengage();
463 StatSampler::destroy();
465 #ifndef SERIALGC
466 // stop CMS threads
467 if (UseConcMarkSweepGC) {
468 ConcurrentMarkSweepThread::stop();
469 }
470 #endif // SERIALGC
472 // Print GC/heap related information.
473 if (PrintGCDetails) {
474 Universe::print();
475 AdaptiveSizePolicyOutput(0);
476 }
479 if (Arguments::has_alloc_profile()) {
480 HandleMark hm;
481 // Do one last collection to enumerate all the objects
482 // allocated since the last one.
483 Universe::heap()->collect(GCCause::_allocation_profiler);
484 AllocationProfiler::disengage();
485 AllocationProfiler::print(0);
486 }
488 if (PrintBytecodeHistogram) {
489 BytecodeHistogram::print();
490 }
492 if (JvmtiExport::should_post_thread_life()) {
493 JvmtiExport::post_thread_end(thread);
494 }
495 // Always call even when there are not JVMTI environments yet, since environments
496 // may be attached late and JVMTI must track phases of VM execution
497 JvmtiExport::post_vm_death();
498 Threads::shutdown_vm_agents();
500 // Terminate the signal thread
501 // Note: we don't wait until it actually dies.
502 os::terminate_signal_thread();
504 print_statistics();
505 Universe::heap()->print_tracing_info();
507 { MutexLocker ml(BeforeExit_lock);
508 _before_exit_status = BEFORE_EXIT_DONE;
509 BeforeExit_lock->notify_all();
510 }
512 #undef BEFORE_EXIT_NOT_RUN
513 #undef BEFORE_EXIT_RUNNING
514 #undef BEFORE_EXIT_DONE
515 }
517 void vm_exit(int code) {
518 Thread* thread = ThreadLocalStorage::thread_index() == -1 ? NULL
519 : ThreadLocalStorage::get_thread_slow();
520 if (thread == NULL) {
521 // we have serious problems -- just exit
522 vm_direct_exit(code);
523 }
525 if (VMThread::vm_thread() != NULL) {
526 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
527 VM_Exit op(code);
528 if (thread->is_Java_thread())
529 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
530 VMThread::execute(&op);
531 // should never reach here; but in case something wrong with VM Thread.
532 vm_direct_exit(code);
533 } else {
534 // VM thread is gone, just exit
535 vm_direct_exit(code);
536 }
537 ShouldNotReachHere();
538 }
540 void notify_vm_shutdown() {
541 // For now, just a dtrace probe.
542 HS_DTRACE_PROBE(hotspot, vm__shutdown);
543 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
544 }
546 void vm_direct_exit(int code) {
547 notify_vm_shutdown();
548 ::exit(code);
549 }
551 void vm_perform_shutdown_actions() {
552 // Warning: do not call 'exit_globals()' here. All threads are still running.
553 // Calling 'exit_globals()' will disable thread-local-storage and cause all
554 // kinds of assertions to trigger in debug mode.
555 if (is_init_completed()) {
556 Thread* thread = Thread::current();
557 if (thread->is_Java_thread()) {
558 // We are leaving the VM, set state to native (in case any OS exit
559 // handlers call back to the VM)
560 JavaThread* jt = (JavaThread*)thread;
561 // Must always be walkable or have no last_Java_frame when in
562 // thread_in_native
563 jt->frame_anchor()->make_walkable(jt);
564 jt->set_thread_state(_thread_in_native);
565 }
566 }
567 notify_vm_shutdown();
568 }
570 void vm_shutdown()
571 {
572 vm_perform_shutdown_actions();
573 os::shutdown();
574 }
576 void vm_abort(bool dump_core) {
577 vm_perform_shutdown_actions();
578 os::abort(dump_core);
579 ShouldNotReachHere();
580 }
582 void vm_notify_during_shutdown(const char* error, const char* message) {
583 if (error != NULL) {
584 tty->print_cr("Error occurred during initialization of VM");
585 tty->print("%s", error);
586 if (message != NULL) {
587 tty->print_cr(": %s", message);
588 }
589 else {
590 tty->cr();
591 }
592 }
593 if (ShowMessageBoxOnError && WizardMode) {
594 fatal("Error occurred during initialization of VM");
595 }
596 }
598 void vm_exit_during_initialization(Handle exception) {
599 tty->print_cr("Error occurred during initialization of VM");
600 // If there are exceptions on this thread it must be cleared
601 // first and here. Any future calls to EXCEPTION_MARK requires
602 // that no pending exceptions exist.
603 Thread *THREAD = Thread::current();
604 if (HAS_PENDING_EXCEPTION) {
605 CLEAR_PENDING_EXCEPTION;
606 }
607 java_lang_Throwable::print(exception, tty);
608 tty->cr();
609 java_lang_Throwable::print_stack_trace(exception(), tty);
610 tty->cr();
611 vm_notify_during_shutdown(NULL, NULL);
613 // Failure during initialization, we don't want to dump core
614 vm_abort(false);
615 }
617 void vm_exit_during_initialization(symbolHandle ex, const char* message) {
618 ResourceMark rm;
619 vm_notify_during_shutdown(ex->as_C_string(), message);
621 // Failure during initialization, we don't want to dump core
622 vm_abort(false);
623 }
625 void vm_exit_during_initialization(const char* error, const char* message) {
626 vm_notify_during_shutdown(error, message);
628 // Failure during initialization, we don't want to dump core
629 vm_abort(false);
630 }
632 void vm_shutdown_during_initialization(const char* error, const char* message) {
633 vm_notify_during_shutdown(error, message);
634 vm_shutdown();
635 }
637 JDK_Version JDK_Version::_current;
639 void JDK_Version::initialize() {
640 jdk_version_info info;
641 assert(!_current.is_valid(), "Don't initialize twice");
643 void *lib_handle = os::native_java_library();
644 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
645 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
647 if (func == NULL) {
648 // JDK older than 1.6
649 _current._partially_initialized = true;
650 } else {
651 (*func)(&info, sizeof(info));
653 int major = JDK_VERSION_MAJOR(info.jdk_version);
654 int minor = JDK_VERSION_MINOR(info.jdk_version);
655 int micro = JDK_VERSION_MICRO(info.jdk_version);
656 int build = JDK_VERSION_BUILD(info.jdk_version);
657 if (major == 1 && minor > 4) {
658 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
659 major = minor;
660 minor = micro;
661 micro = 0;
662 }
663 _current = JDK_Version(major, minor, micro, info.update_version,
664 info.special_update_version, build,
665 info.thread_park_blocker == 1);
666 }
667 }
669 void JDK_Version::fully_initialize(
670 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
671 // This is only called when current is less than 1.6 and we've gotten
672 // far enough in the initialization to determine the exact version.
673 assert(major < 6, "not needed for JDK version >= 6");
674 assert(is_partially_initialized(), "must not initialize");
675 if (major < 5) {
676 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
677 micro = minor;
678 minor = major;
679 major = 1;
680 }
681 _current = JDK_Version(major, minor, micro, update);
682 }
684 void JDK_Version_init() {
685 JDK_Version::initialize();
686 }
688 static int64_t encode_jdk_version(const JDK_Version& v) {
689 return
690 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
691 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
692 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
693 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
694 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
695 ((int64_t)v.build_number() << (BitsPerByte * 0));
696 }
698 int JDK_Version::compare(const JDK_Version& other) const {
699 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
700 if (!is_partially_initialized() && other.is_partially_initialized()) {
701 return -(other.compare(*this)); // flip the comparators
702 }
703 assert(!other.is_partially_initialized(), "Not initialized yet");
704 if (is_partially_initialized()) {
705 assert(other.major_version() >= 6,
706 "Invalid JDK version comparison during initialization");
707 return -1;
708 } else {
709 uint64_t e = encode_jdk_version(*this);
710 uint64_t o = encode_jdk_version(other);
711 return (e > o) ? 1 : ((e == o) ? 0 : -1);
712 }
713 }
715 void JDK_Version::to_string(char* buffer, size_t buflen) const {
716 size_t index = 0;
717 if (!is_valid()) {
718 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
719 } else if (is_partially_initialized()) {
720 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
721 } else {
722 index += jio_snprintf(
723 &buffer[index], buflen - index, "%d.%d", _major, _minor);
724 if (_micro > 0) {
725 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
726 }
727 if (_update > 0) {
728 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
729 }
730 if (_special > 0) {
731 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
732 }
733 if (_build > 0) {
734 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
735 }
736 }
737 }
