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 */
24
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 #ifndef SERIALGC
89 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
90 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
91 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
92 #endif
93 #ifdef COMPILER1
94 #include "c1/c1_Compiler.hpp"
95 #include "c1/c1_Runtime1.hpp"
96 #endif
97 #ifdef COMPILER2
98 #include "code/compiledIC.hpp"
99 #include "compiler/methodLiveness.hpp"
100 #include "opto/compile.hpp"
101 #include "opto/indexSet.hpp"
102 #include "opto/runtime.hpp"
103 #endif
104
105 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
106
107 #ifndef PRODUCT
108
109 // Statistics printing (method invocation histogram)
110
111 GrowableArray<methodOop>* collected_invoked_methods;
112
113 void collect_invoked_methods(methodOop m) {
114 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
115 collected_invoked_methods->push(m);
116 }
117 }
118
119
120 GrowableArray<methodOop>* collected_profiled_methods;
121
122 void collect_profiled_methods(methodOop m) {
123 methodHandle mh(Thread::current(), m);
124 if ((m->method_data() != NULL) &&
125 (PrintMethodData || CompilerOracle::should_print(mh))) {
126 collected_profiled_methods->push(m);
127 }
128 }
129
130
131 int compare_methods(methodOop* a, methodOop* b) {
132 // %%% there can be 32-bit overflow here
133 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
134 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
135 }
136
137
138 void print_method_invocation_histogram() {
139 ResourceMark rm;
140 HandleMark hm;
141 collected_invoked_methods = new GrowableArray<methodOop>(1024);
142 SystemDictionary::methods_do(collect_invoked_methods);
143 collected_invoked_methods->sort(&compare_methods);
144 //
145 tty->cr();
146 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
147 tty->cr();
148 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
149 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
150 synch_total = 0, nativ_total = 0, acces_total = 0;
151 for (int index = 0; index < collected_invoked_methods->length(); index++) {
152 methodOop m = collected_invoked_methods->at(index);
153 int c = m->invocation_count() + m->compiled_invocation_count();
154 if (c >= MethodHistogramCutoff) m->print_invocation_count();
155 int_total += m->invocation_count();
156 comp_total += m->compiled_invocation_count();
157 if (m->is_final()) final_total += c;
158 if (m->is_static()) static_total += c;
159 if (m->is_synchronized()) synch_total += c;
160 if (m->is_native()) nativ_total += c;
161 if (m->is_accessor()) acces_total += c;
162 }
163 tty->cr();
164 total = int_total + comp_total;
165 tty->print_cr("Invocations summary:");
166 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
167 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
168 tty->print_cr("\t%9d (100%%) total", total);
169 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
170 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
171 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
172 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
173 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
174 tty->cr();
175 SharedRuntime::print_call_statistics(comp_total);
176 }
177
178 void print_method_profiling_data() {
179 ResourceMark rm;
180 HandleMark hm;
181 collected_profiled_methods = new GrowableArray<methodOop>(1024);
182 SystemDictionary::methods_do(collect_profiled_methods);
183 collected_profiled_methods->sort(&compare_methods);
184
185 int count = collected_profiled_methods->length();
186 if (count > 0) {
187 for (int index = 0; index < count; index++) {
188 methodOop m = collected_profiled_methods->at(index);
189 ttyLocker ttyl;
190 tty->print_cr("------------------------------------------------------------------------");
191 //m->print_name(tty);
192 m->print_invocation_count();
193 tty->cr();
194 m->print_codes();
195 }
196 tty->print_cr("------------------------------------------------------------------------");
197 }
198 }
199
200 void print_bytecode_count() {
201 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
202 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
203 }
204 }
205
206 AllocStats alloc_stats;
207
208
209
210 // General statistics printing (profiling ...)
211
212 void print_statistics() {
213
214 #ifdef ASSERT
215
216 if (CountRuntimeCalls) {
217 extern Histogram *RuntimeHistogram;
218 RuntimeHistogram->print();
219 }
220
221 if (CountJNICalls) {
222 extern Histogram *JNIHistogram;
223 JNIHistogram->print();
224 }
225
226 if (CountJVMCalls) {
227 extern Histogram *JVMHistogram;
228 JVMHistogram->print();
229 }
230
231 #endif
232
233 if (MemProfiling) {
234 MemProfiler::disengage();
235 }
236
237 if (CITime) {
238 CompileBroker::print_times();
239 }
240
241 #ifdef COMPILER1
242 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
243 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
244 Runtime1::print_statistics();
245 Deoptimization::print_statistics();
246 SharedRuntime::print_statistics();
247 nmethod::print_statistics();
248 }
249 #endif /* COMPILER1 */
250
251 #ifdef COMPILER2
252 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
253 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
254 Compile::print_statistics();
255 #ifndef COMPILER1
256 Deoptimization::print_statistics();
257 nmethod::print_statistics();
258 SharedRuntime::print_statistics();
259 #endif //COMPILER1
260 os::print_statistics();
261 }
262
263 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
264 OptoRuntime::print_named_counters();
265 }
266
267 if (TimeLivenessAnalysis) {
268 MethodLiveness::print_times();
269 }
270 #ifdef ASSERT
271 if (CollectIndexSetStatistics) {
272 IndexSet::print_statistics();
273 }
274 #endif // ASSERT
275 #endif // COMPILER2
276 if (CountCompiledCalls) {
277 print_method_invocation_histogram();
278 }
279 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
280 print_method_profiling_data();
281 }
282 if (TimeCompiler) {
283 COMPILER2_PRESENT(Compile::print_timers();)
284 }
285 if (TimeCompilationPolicy) {
286 CompilationPolicy::policy()->print_time();
287 }
288 if (TimeOopMap) {
289 GenerateOopMap::print_time();
290 }
291 if (ProfilerCheckIntervals) {
292 PeriodicTask::print_intervals();
293 }
294 if (PrintSymbolTableSizeHistogram) {
295 SymbolTable::print_histogram();
296 }
297 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
298 BytecodeCounter::print();
299 }
300 if (PrintBytecodePairHistogram) {
301 BytecodePairHistogram::print();
302 }
303
304 if (PrintCodeCache) {
305 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
306 CodeCache::print();
307 }
308
309 if (PrintCodeCache2) {
310 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
311 CodeCache::print_internals();
312 }
313
314 if (PrintClassStatistics) {
315 SystemDictionary::print_class_statistics();
316 }
317 if (PrintMethodStatistics) {
318 SystemDictionary::print_method_statistics();
319 }
320
321 if (PrintVtableStats) {
322 klassVtable::print_statistics();
323 klassItable::print_statistics();
324 }
325 if (VerifyOops) {
326 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
327 }
328
329 print_bytecode_count();
330 if (PrintMallocStatistics) {
331 tty->print("allocation stats: ");
332 alloc_stats.print();
333 tty->cr();
334 }
335
336 if (PrintSystemDictionaryAtExit) {
337 SystemDictionary::print();
338 }
339
340 if (PrintBiasedLockingStatistics) {
341 BiasedLocking::print_counters();
342 }
343
344 #ifdef ENABLE_ZAP_DEAD_LOCALS
345 #ifdef COMPILER2
346 if (ZapDeadCompiledLocals) {
347 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
348 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
349 }
350 #endif // COMPILER2
351 #endif // ENABLE_ZAP_DEAD_LOCALS
352 }
353
354 #else // PRODUCT MODE STATISTICS
355
356 void print_statistics() {
357
358 if (CITime) {
359 CompileBroker::print_times();
360 }
361 #ifdef COMPILER2
362 if (PrintPreciseBiasedLockingStatistics) {
363 OptoRuntime::print_named_counters();
364 }
365 #endif
366 if (PrintBiasedLockingStatistics) {
367 BiasedLocking::print_counters();
368 }
369 }
370
371 #endif
372
373
374 // Helper class for registering on_exit calls through JVM_OnExit
375
376 extern "C" {
377 typedef void (*__exit_proc)(void);
378 }
379
380 class ExitProc : public CHeapObj {
381 private:
382 __exit_proc _proc;
383 // void (*_proc)(void);
384 ExitProc* _next;
385 public:
386 // ExitProc(void (*proc)(void)) {
387 ExitProc(__exit_proc proc) {
388 _proc = proc;
389 _next = NULL;
390 }
391 void evaluate() { _proc(); }
392 ExitProc* next() const { return _next; }
393 void set_next(ExitProc* next) { _next = next; }
394 };
395
396
397 // Linked list of registered on_exit procedures
398
399 static ExitProc* exit_procs = NULL;
400
401
402 extern "C" {
403 void register_on_exit_function(void (*func)(void)) {
404 ExitProc *entry = new ExitProc(func);
405 // Classic vm does not throw an exception in case the allocation failed,
406 if (entry != NULL) {
407 entry->set_next(exit_procs);
408 exit_procs = entry;
409 }
410 }
411 }
412
413 // Note: before_exit() can be executed only once, if more than one threads
414 // are trying to shutdown the VM at the same time, only one thread
415 // can run before_exit() and all other threads must wait.
416 void before_exit(JavaThread * thread) {
417 #define BEFORE_EXIT_NOT_RUN 0
418 #define BEFORE_EXIT_RUNNING 1
419 #define BEFORE_EXIT_DONE 2
420 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
421
422 // Note: don't use a Mutex to guard the entire before_exit(), as
423 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
424 // A CAS or OSMutex would work just fine but then we need to manipulate
425 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
426 // for synchronization.
427 { MutexLocker ml(BeforeExit_lock);
428 switch (_before_exit_status) {
429 case BEFORE_EXIT_NOT_RUN:
430 _before_exit_status = BEFORE_EXIT_RUNNING;
431 break;
432 case BEFORE_EXIT_RUNNING:
433 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
434 BeforeExit_lock->wait();
435 }
436 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
437 return;
438 case BEFORE_EXIT_DONE:
439 return;
440 }
441 }
442
443 // The only difference between this and Win32's _onexit procs is that
444 // this version is invoked before any threads get killed.
445 ExitProc* current = exit_procs;
446 while (current != NULL) {
447 ExitProc* next = current->next();
448 current->evaluate();
449 delete current;
450 current = next;
451 }
452
453 // Hang forever on exit if we're reporting an error.
454 if (ShowMessageBoxOnError && is_error_reported()) {
455 os::infinite_sleep();
456 }
457
458 // Terminate watcher thread - must before disenrolling any periodic task
459 if (PeriodicTask::num_tasks() > 0)
460 WatcherThread::stop();
461
462 // Print statistics gathered (profiling ...)
463 if (Arguments::has_profile()) {
464 FlatProfiler::disengage();
465 FlatProfiler::print(10);
466 }
467
468 // shut down the StatSampler task
469 StatSampler::disengage();
470 StatSampler::destroy();
471
472 // We do not need to explicitly stop concurrent GC threads because the
473 // JVM will be taken down at a safepoint when such threads are inactive --
474 // except for some concurrent G1 threads, see (comment in)
475 // Threads::destroy_vm().
476
477 // Print GC/heap related information.
478 if (PrintGCDetails) {
479 Universe::print();
480 AdaptiveSizePolicyOutput(0);
481 }
482
483
484 if (Arguments::has_alloc_profile()) {
485 HandleMark hm;
486 // Do one last collection to enumerate all the objects
487 // allocated since the last one.
488 Universe::heap()->collect(GCCause::_allocation_profiler);
489 AllocationProfiler::disengage();
490 AllocationProfiler::print(0);
491 }
492
493 if (PrintBytecodeHistogram) {
494 BytecodeHistogram::print();
495 }
496
497 if (JvmtiExport::should_post_thread_life()) {
498 JvmtiExport::post_thread_end(thread);
499 }
500 // Always call even when there are not JVMTI environments yet, since environments
501 // may be attached late and JVMTI must track phases of VM execution
502 JvmtiExport::post_vm_death();
503 Threads::shutdown_vm_agents();
504
505 // Terminate the signal thread
506 // Note: we don't wait until it actually dies.
507 os::terminate_signal_thread();
508
509 print_statistics();
510 Universe::heap()->print_tracing_info();
511
512 { MutexLocker ml(BeforeExit_lock);
513 _before_exit_status = BEFORE_EXIT_DONE;
514 BeforeExit_lock->notify_all();
515 }
516
517 #undef BEFORE_EXIT_NOT_RUN
518 #undef BEFORE_EXIT_RUNNING
519 #undef BEFORE_EXIT_DONE
520 }
521
522 void vm_exit(int code) {
523 Thread* thread = ThreadLocalStorage::is_initialized() ?
524 ThreadLocalStorage::get_thread_slow() : NULL;
525 if (thread == NULL) {
526 // we have serious problems -- just exit
527 vm_direct_exit(code);
528 }
529
530 if (VMThread::vm_thread() != NULL) {
531 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
532 VM_Exit op(code);
533 if (thread->is_Java_thread())
534 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
535 VMThread::execute(&op);
536 // should never reach here; but in case something wrong with VM Thread.
537 vm_direct_exit(code);
538 } else {
539 // VM thread is gone, just exit
540 vm_direct_exit(code);
541 }
542 ShouldNotReachHere();
543 }
544
545 void notify_vm_shutdown() {
546 // For now, just a dtrace probe.
547 HS_DTRACE_PROBE(hotspot, vm__shutdown);
548 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
549 }
550
551 void vm_direct_exit(int code) {
552 notify_vm_shutdown();
553 os::wait_for_keypress_at_exit();
554 ::exit(code);
555 }
556
557 void vm_perform_shutdown_actions() {
558 // Warning: do not call 'exit_globals()' here. All threads are still running.
559 // Calling 'exit_globals()' will disable thread-local-storage and cause all
560 // kinds of assertions to trigger in debug mode.
561 if (is_init_completed()) {
562 Thread* thread = ThreadLocalStorage::is_initialized() ?
563 ThreadLocalStorage::get_thread_slow() : NULL;
564 if (thread != NULL && thread->is_Java_thread()) {
565 // We are leaving the VM, set state to native (in case any OS exit
566 // handlers call back to the VM)
567 JavaThread* jt = (JavaThread*)thread;
568 // Must always be walkable or have no last_Java_frame when in
569 // thread_in_native
570 jt->frame_anchor()->make_walkable(jt);
571 jt->set_thread_state(_thread_in_native);
572 }
573 }
574 notify_vm_shutdown();
575 }
576
577 void vm_shutdown()
578 {
579 vm_perform_shutdown_actions();
580 os::wait_for_keypress_at_exit();
581 os::shutdown();
582 }
583
584 void vm_abort(bool dump_core) {
585 vm_perform_shutdown_actions();
586 os::wait_for_keypress_at_exit();
587 os::abort(dump_core);
588 ShouldNotReachHere();
589 }
590
591 void vm_notify_during_shutdown(const char* error, const char* message) {
592 if (error != NULL) {
593 tty->print_cr("Error occurred during initialization of VM");
594 tty->print("%s", error);
595 if (message != NULL) {
596 tty->print_cr(": %s", message);
597 }
598 else {
599 tty->cr();
600 }
601 }
602 if (ShowMessageBoxOnError && WizardMode) {
603 fatal("Error occurred during initialization of VM");
604 }
605 }
606
607 void vm_exit_during_initialization(Handle exception) {
608 tty->print_cr("Error occurred during initialization of VM");
609 // If there are exceptions on this thread it must be cleared
610 // first and here. Any future calls to EXCEPTION_MARK requires
611 // that no pending exceptions exist.
612 Thread *THREAD = Thread::current();
613 if (HAS_PENDING_EXCEPTION) {
614 CLEAR_PENDING_EXCEPTION;
615 }
616 java_lang_Throwable::print(exception, tty);
617 tty->cr();
618 java_lang_Throwable::print_stack_trace(exception(), tty);
619 tty->cr();
620 vm_notify_during_shutdown(NULL, NULL);
621
622 // Failure during initialization, we don't want to dump core
623 vm_abort(false);
624 }
625
626 void vm_exit_during_initialization(Symbol* ex, const char* message) {
627 ResourceMark rm;
628 vm_notify_during_shutdown(ex->as_C_string(), message);
629
630 // Failure during initialization, we don't want to dump core
631 vm_abort(false);
632 }
633
634 void vm_exit_during_initialization(const char* error, const char* message) {
635 vm_notify_during_shutdown(error, message);
636
637 // Failure during initialization, we don't want to dump core
638 vm_abort(false);
639 }
640
641 void vm_shutdown_during_initialization(const char* error, const char* message) {
642 vm_notify_during_shutdown(error, message);
643 vm_shutdown();
644 }
645
646 JDK_Version JDK_Version::_current;
647
648 void JDK_Version::initialize() {
649 jdk_version_info info;
650 assert(!_current.is_valid(), "Don't initialize twice");
651
652 void *lib_handle = os::native_java_library();
653 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
654 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
655
656 if (func == NULL) {
657 // JDK older than 1.6
658 _current._partially_initialized = true;
659 } else {
660 (*func)(&info, sizeof(info));
661
662 int major = JDK_VERSION_MAJOR(info.jdk_version);
663 int minor = JDK_VERSION_MINOR(info.jdk_version);
664 int micro = JDK_VERSION_MICRO(info.jdk_version);
665 int build = JDK_VERSION_BUILD(info.jdk_version);
666 if (major == 1 && minor > 4) {
667 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
668 major = minor;
669 minor = micro;
670 micro = 0;
671 }
672 _current = JDK_Version(major, minor, micro, info.update_version,
673 info.special_update_version, build,
674 info.thread_park_blocker == 1,
675 info.post_vm_init_hook_enabled == 1,
676 info.pending_list_uses_discovered_field == 1);
677 }
678 }
679
680 void JDK_Version::fully_initialize(
681 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
682 // This is only called when current is less than 1.6 and we've gotten
683 // far enough in the initialization to determine the exact version.
684 assert(major < 6, "not needed for JDK version >= 6");
685 assert(is_partially_initialized(), "must not initialize");
686 if (major < 5) {
687 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
688 micro = minor;
689 minor = major;
690 major = 1;
691 }
692 _current = JDK_Version(major, minor, micro, update);
693 }
694
695 void JDK_Version_init() {
696 JDK_Version::initialize();
697 }
698
699 static int64_t encode_jdk_version(const JDK_Version& v) {
700 return
701 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
702 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
703 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
704 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
705 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
706 ((int64_t)v.build_number() << (BitsPerByte * 0));
707 }
708
709 int JDK_Version::compare(const JDK_Version& other) const {
710 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
711 if (!is_partially_initialized() && other.is_partially_initialized()) {
712 return -(other.compare(*this)); // flip the comparators
713 }
714 assert(!other.is_partially_initialized(), "Not initialized yet");
715 if (is_partially_initialized()) {
716 assert(other.major_version() >= 6,
717 "Invalid JDK version comparison during initialization");
718 return -1;
719 } else {
720 uint64_t e = encode_jdk_version(*this);
721 uint64_t o = encode_jdk_version(other);
722 return (e > o) ? 1 : ((e == o) ? 0 : -1);
723 }
724 }
725
726 void JDK_Version::to_string(char* buffer, size_t buflen) const {
727 size_t index = 0;
728 if (!is_valid()) {
729 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
730 } else if (is_partially_initialized()) {
731 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
732 } else {
733 index += jio_snprintf(
734 &buffer[index], buflen - index, "%d.%d", _major, _minor);
735 if (_micro > 0) {
736 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
737 }
738 if (_update > 0) {
739 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
740 }
741 if (_special > 0) {
742 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
743 }
744 if (_build > 0) {
745 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
746 }
747 }
748 }