Bug Summary

File:jdk/src/hotspot/share/runtime/java.cpp
Warning:line 779, column 7
Value stored to 'index' is never read

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name java.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mthread-model posix -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/libjvm/objs/precompiled -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D _GNU_SOURCE -D _REENTRANT -D LIBC=gnu -D LINUX -D VM_LITTLE_ENDIAN -D _LP64=1 -D ASSERT -D CHECK_UNHANDLED_OOPS -D TARGET_ARCH_x86 -D INCLUDE_SUFFIX_OS=_linux -D INCLUDE_SUFFIX_CPU=_x86 -D INCLUDE_SUFFIX_COMPILER=_gcc -D TARGET_COMPILER_gcc -D AMD64 -D HOTSPOT_LIB_ARCH="amd64" -D COMPILER1 -D COMPILER2 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc/adfiles -I /home/daniel/Projects/java/jdk/src/hotspot/share -I /home/daniel/Projects/java/jdk/src/hotspot/os/linux -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix -I /home/daniel/Projects/java/jdk/src/hotspot/cpu/x86 -I /home/daniel/Projects/java/jdk/src/hotspot/os_cpu/linux_x86 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc -I /home/daniel/Projects/java/jdk/src/hotspot/share/precompiled -I /home/daniel/Projects/java/jdk/src/hotspot/share/include -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix/include -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base/linux -I /home/daniel/Projects/java/jdk/src/java.base/share/native/libjimage -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc/adfiles -I /home/daniel/Projects/java/jdk/src/hotspot/share -I /home/daniel/Projects/java/jdk/src/hotspot/os/linux -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix -I /home/daniel/Projects/java/jdk/src/hotspot/cpu/x86 -I /home/daniel/Projects/java/jdk/src/hotspot/os_cpu/linux_x86 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc -D _FORTIFY_SOURCE=2 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-format-zero-length -Wno-unused-parameter -Wno-unused -Wno-parentheses -Wno-comment -Wno-unknown-pragmas -Wno-address -Wno-delete-non-virtual-dtor -Wno-char-subscripts -Wno-array-bounds -Wno-int-in-bool-context -Wno-ignored-qualifiers -Wno-missing-field-initializers -Wno-implicit-fallthrough -Wno-empty-body -Wno-strict-overflow -Wno-sequence-point -Wno-maybe-uninitialized -Wno-misleading-indentation -Wno-cast-function-type -Wno-shift-negative-value -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /home/daniel/Projects/java/jdk/make/hotspot -ferror-limit 19 -fmessage-length 0 -fvisibility hidden -stack-protector 1 -fno-rtti -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -o /home/daniel/Projects/java/scan/2021-12-21-193737-8510-1 -x c++ /home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp
1/*
2 * Copyright (c) 1997, 2021, 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 "jvm.h"
27#include "cds/dynamicArchive.hpp"
28#include "classfile/classLoaderDataGraph.hpp"
29#include "classfile/javaClasses.hpp"
30#include "classfile/stringTable.hpp"
31#include "classfile/symbolTable.hpp"
32#include "classfile/systemDictionary.hpp"
33#include "code/codeCache.hpp"
34#include "compiler/compileBroker.hpp"
35#include "compiler/compilerOracle.hpp"
36#include "gc/shared/collectedHeap.hpp"
37#include "gc/shared/stringdedup/stringDedup.hpp"
38#include "interpreter/bytecodeHistogram.hpp"
39#include "jfr/jfrEvents.hpp"
40#include "jfr/support/jfrThreadId.hpp"
41#if INCLUDE_JVMCI1
42#include "jvmci/jvmci.hpp"
43#endif
44#include "logging/log.hpp"
45#include "logging/logStream.hpp"
46#include "memory/metaspaceUtils.hpp"
47#include "memory/oopFactory.hpp"
48#include "memory/resourceArea.hpp"
49#include "memory/universe.hpp"
50#include "oops/constantPool.hpp"
51#include "oops/generateOopMap.hpp"
52#include "oops/instanceKlass.hpp"
53#include "oops/instanceOop.hpp"
54#include "oops/klassVtable.hpp"
55#include "oops/method.hpp"
56#include "oops/objArrayOop.hpp"
57#include "oops/oop.inline.hpp"
58#include "oops/symbol.hpp"
59#include "prims/jvmtiExport.hpp"
60#include "runtime/deoptimization.hpp"
61#include "runtime/flags/flagSetting.hpp"
62#include "runtime/handles.inline.hpp"
63#include "runtime/init.hpp"
64#include "runtime/interfaceSupport.inline.hpp"
65#include "runtime/java.hpp"
66#include "runtime/sharedRuntime.hpp"
67#include "runtime/statSampler.hpp"
68#include "runtime/stubRoutines.hpp"
69#include "runtime/sweeper.hpp"
70#include "runtime/task.hpp"
71#include "runtime/thread.inline.hpp"
72#include "runtime/timer.hpp"
73#include "runtime/vmOperations.hpp"
74#include "runtime/vmThread.hpp"
75#include "runtime/vm_version.hpp"
76#include "services/memTracker.hpp"
77#include "utilities/dtrace.hpp"
78#include "utilities/globalDefinitions.hpp"
79#include "utilities/macros.hpp"
80#include "utilities/vmError.hpp"
81#ifdef COMPILER11
82#include "c1/c1_Compiler.hpp"
83#include "c1/c1_Runtime1.hpp"
84#endif
85#ifdef COMPILER21
86#include "code/compiledIC.hpp"
87#include "opto/compile.hpp"
88#include "opto/indexSet.hpp"
89#include "opto/runtime.hpp"
90#endif
91#if INCLUDE_JFR1
92#include "jfr/jfr.hpp"
93#endif
94
95GrowableArray<Method*>* collected_profiled_methods;
96
97int compare_methods(Method** a, Method** b) {
98 // compiled_invocation_count() returns int64_t, forcing the entire expression
99 // to be evaluated as int64_t. Overflow is not an issue.
100 int64_t diff = (((*b)->invocation_count() + (*b)->compiled_invocation_count())
101 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()));
102 return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
103}
104
105void collect_profiled_methods(Method* m) {
106 Thread* thread = Thread::current();
107 methodHandle mh(thread, m);
108 if ((m->method_data() != NULL__null) &&
109 (PrintMethodData || CompilerOracle::should_print(mh))) {
110 collected_profiled_methods->push(m);
111 }
112}
113
114void print_method_profiling_data() {
115 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)|| C1UpdateMethodData &&
116 (PrintMethodData || CompilerOracle::should_print_methods())) {
117 ResourceMark rm;
118 collected_profiled_methods = new GrowableArray<Method*>(1024);
119 SystemDictionary::methods_do(collect_profiled_methods);
120 collected_profiled_methods->sort(&compare_methods);
121
122 int count = collected_profiled_methods->length();
123 int total_size = 0;
124 if (count > 0) {
125 for (int index = 0; index < count; index++) {
126 Method* m = collected_profiled_methods->at(index);
127 ttyLocker ttyl;
128 tty->print_cr("------------------------------------------------------------------------");
129 m->print_invocation_count();
130 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
131 tty->cr();
132 // Dump data on parameters if any
133 if (m->method_data() != NULL__null && m->method_data()->parameters_type_data() != NULL__null) {
134 tty->fill_to(2);
135 m->method_data()->parameters_type_data()->print_data_on(tty);
136 }
137 m->print_codes();
138 total_size += m->method_data()->size_in_bytes();
139 }
140 tty->print_cr("------------------------------------------------------------------------");
141 tty->print_cr("Total MDO size: %d bytes", total_size);
142 }
143 }
144}
145
146
147#ifndef PRODUCT
148
149// Statistics printing (method invocation histogram)
150
151GrowableArray<Method*>* collected_invoked_methods;
152
153void collect_invoked_methods(Method* m) {
154 if (m->invocation_count() + m->compiled_invocation_count() >= 1) {
155 collected_invoked_methods->push(m);
156 }
157}
158
159
160// Invocation count accumulators should be unsigned long to shift the
161// overflow border. Longer-running workloads tend to create invocation
162// counts which already overflow 32-bit counters for individual methods.
163void print_method_invocation_histogram() {
164 ResourceMark rm;
165 collected_invoked_methods = new GrowableArray<Method*>(1024);
166 SystemDictionary::methods_do(collect_invoked_methods);
167 collected_invoked_methods->sort(&compare_methods);
168 //
169 tty->cr();
170 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT"%" "l" "d" "):", MethodHistogramCutoff);
171 tty->cr();
172 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
173 uint64_t total = 0,
174 int_total = 0,
175 comp_total = 0,
176 special_total= 0,
177 static_total = 0,
178 final_total = 0,
179 synch_total = 0,
180 native_total = 0,
181 access_total = 0;
182 for (int index = 0; index < collected_invoked_methods->length(); index++) {
183 // Counter values returned from getter methods are signed int.
184 // To shift the overflow border by a factor of two, we interpret
185 // them here as unsigned long. A counter can't be negative anyway.
186 Method* m = collected_invoked_methods->at(index);
187 uint64_t iic = (uint64_t)m->invocation_count();
188 uint64_t cic = (uint64_t)m->compiled_invocation_count();
189 if ((iic + cic) >= (uint64_t)MethodHistogramCutoff) m->print_invocation_count();
190 int_total += iic;
191 comp_total += cic;
192 if (m->is_final()) final_total += iic + cic;
193 if (m->is_static()) static_total += iic + cic;
194 if (m->is_synchronized()) synch_total += iic + cic;
195 if (m->is_native()) native_total += iic + cic;
196 if (m->is_accessor()) access_total += iic + cic;
197 }
198 tty->cr();
199 total = int_total + comp_total;
200 special_total = final_total + static_total +synch_total + native_total + access_total;
201 tty->print_cr("Invocations summary for %d methods:", collected_invoked_methods->length());
202 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (100%%) total", total);
203 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- interpreted", int_total, 100.0 * int_total / total);
204 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- compiled", comp_total, 100.0 * comp_total / total);
205 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- special methods (interpreted and compiled)",
206 special_total, 100.0 * special_total/ total);
207 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- synchronized",synch_total, 100.0 * synch_total / total);
208 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- final", final_total, 100.0 * final_total / total);
209 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- static", static_total, 100.0 * static_total / total);
210 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- native", native_total, 100.0 * native_total / total);
211 tty->print_cr("\t" UINT64_FORMAT_W(12)"%" "12" "l" "u" " (%4.1f%%) |- accessor", access_total, 100.0 * access_total / total);
212 tty->cr();
213 SharedRuntime::print_call_statistics(comp_total);
214}
215
216void print_bytecode_count() {
217 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
218 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
219 }
220}
221
222
223// General statistics printing (profiling ...)
224void print_statistics() {
225 if (CITime) {
226 CompileBroker::print_times();
227 }
228
229#ifdef COMPILER11
230 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
231 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
232 Runtime1::print_statistics();
233 SharedRuntime::print_statistics();
234 }
235#endif /* COMPILER1 */
236
237#ifdef COMPILER21
238 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
239 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
240 Compile::print_statistics();
241 Deoptimization::print_statistics();
242#ifndef COMPILER11
243 SharedRuntime::print_statistics();
244#endif //COMPILER1
245 os::print_statistics();
246 }
247
248 if (PrintLockStatistics || PrintPreciseRTMLockingStatistics) {
249 OptoRuntime::print_named_counters();
250 }
251#ifdef ASSERT1
252 if (CollectIndexSetStatistics) {
253 IndexSet::print_statistics();
254 }
255#endif // ASSERT
256#else // COMPILER2
257#if INCLUDE_JVMCI1
258#ifndef COMPILER11
259 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
260 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
261 Deoptimization::print_statistics();
262 SharedRuntime::print_statistics();
263 }
264#endif // COMPILER1
265#endif // INCLUDE_JVMCI
266#endif // COMPILER2
267
268 if (PrintNMethodStatistics) {
269 nmethod::print_statistics();
270 }
271 if (CountCompiledCalls) {
272 print_method_invocation_histogram();
273 }
274
275 print_method_profiling_data();
276
277 if (TimeOopMap) {
278 GenerateOopMap::print_time();
279 }
280 if (PrintSymbolTableSizeHistogram) {
281 SymbolTable::print_histogram();
282 }
283 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
284 BytecodeCounter::print();
285 }
286 if (PrintBytecodePairHistogram) {
287 BytecodePairHistogram::print();
288 }
289
290 if (PrintCodeCache) {
291 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
292 CodeCache::print();
293 }
294
295 // CodeHeap State Analytics.
296 // Does also call NMethodSweeper::print(tty)
297 if (PrintCodeHeapAnalytics) {
298 CompileBroker::print_heapinfo(NULL__null, "all", 4096); // details
299 } else if (PrintMethodFlushingStatistics) {
300 NMethodSweeper::print(tty);
301 }
302
303 if (PrintCodeCache2) {
304 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
305 CodeCache::print_internals();
306 }
307
308 if (VerifyOops && Verbose) {
309 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
310 }
311
312 print_bytecode_count();
313
314 if (PrintSystemDictionaryAtExit) {
315 ResourceMark rm;
316 MutexLocker mcld(ClassLoaderDataGraph_lock);
317 SystemDictionary::print();
318 }
319
320 if (PrintClassLoaderDataGraphAtExit) {
321 ResourceMark rm;
322 MutexLocker mcld(ClassLoaderDataGraph_lock);
323 ClassLoaderDataGraph::print();
324 }
325
326 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
327 Method::print_touched_methods(tty);
328 }
329
330 // Native memory tracking data
331 if (PrintNMTStatistics) {
332 MemTracker::final_report(tty);
333 }
334
335 if (PrintMetaspaceStatisticsAtExit) {
336 MetaspaceUtils::print_basic_report(tty, 0);
337 }
338
339 ThreadsSMRSupport::log_statistics();
340}
341
342#else // PRODUCT MODE STATISTICS
343
344void print_statistics() {
345
346 if (PrintMethodData) {
347 print_method_profiling_data();
348 }
349
350 if (CITime) {
351 CompileBroker::print_times();
352 }
353
354#ifdef COMPILER2_OR_JVMCI1
355 if ((LogVMOutput || LogCompilation) && UseCompiler) {
356 // Only print the statistics to the log file
357 FlagSetting fs(DisplayVMOutput, false);
358 Deoptimization::print_statistics();
359 }
360#endif /* COMPILER2 || INCLUDE_JVMCI */
361
362 if (PrintCodeCache) {
363 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
364 CodeCache::print();
365 }
366
367 // CodeHeap State Analytics.
368 // Does also call NMethodSweeper::print(tty)
369 if (PrintCodeHeapAnalytics) {
370 CompileBroker::print_heapinfo(NULL__null, "all", 4096); // details
371 } else if (PrintMethodFlushingStatistics) {
372 NMethodSweeper::print(tty);
373 }
374
375#ifdef COMPILER21
376 if (PrintPreciseRTMLockingStatistics) {
377 OptoRuntime::print_named_counters();
378 }
379#endif
380
381 // Native memory tracking data
382 if (PrintNMTStatistics) {
383 MemTracker::final_report(tty);
384 }
385
386 if (PrintMetaspaceStatisticsAtExit) {
387 MetaspaceUtils::print_basic_report(tty, 0);
388 }
389
390 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
391 Method::print_touched_methods(tty);
392 }
393
394 ThreadsSMRSupport::log_statistics();
395}
396
397#endif
398
399// Note: before_exit() can be executed only once, if more than one threads
400// are trying to shutdown the VM at the same time, only one thread
401// can run before_exit() and all other threads must wait.
402void before_exit(JavaThread* thread) {
403 #define BEFORE_EXIT_NOT_RUN 0
404 #define BEFORE_EXIT_RUNNING 1
405 #define BEFORE_EXIT_DONE 2
406 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
407
408 // Note: don't use a Mutex to guard the entire before_exit(), as
409 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
410 // A CAS or OSMutex would work just fine but then we need to manipulate
411 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
412 // for synchronization.
413 { MonitorLocker ml(BeforeExit_lock);
414 switch (_before_exit_status) {
415 case BEFORE_EXIT_NOT_RUN:
416 _before_exit_status = BEFORE_EXIT_RUNNING;
417 break;
418 case BEFORE_EXIT_RUNNING:
419 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
420 ml.wait();
421 }
422 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state")do { if (!(_before_exit_status == BEFORE_EXIT_DONE)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 422, "assert(" "_before_exit_status == BEFORE_EXIT_DONE" ") failed"
, "invalid state"); ::breakpoint(); } } while (0);
423 return;
424 case BEFORE_EXIT_DONE:
425 // need block to avoid SS compiler bug
426 {
427 return;
428 }
429 }
430 }
431
432#if INCLUDE_JVMCI1
433 if (EnableJVMCI) {
434 JVMCI::shutdown();
435 }
436#endif
437
438 // Hang forever on exit if we're reporting an error.
439 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
440 os::infinite_sleep();
441 }
442
443 EventThreadEnd event;
444 if (event.should_commit()) {
445 event.set_thread(JFR_THREAD_ID(thread)((thread)->jfr_thread_local()->thread_id()));
446 event.commit();
447 }
448
449 JFR_ONLY(Jfr::on_vm_shutdown();)Jfr::on_vm_shutdown();
450
451 // Stop the WatcherThread. We do this before disenrolling various
452 // PeriodicTasks to reduce the likelihood of races.
453 if (PeriodicTask::num_tasks() > 0) {
454 WatcherThread::stop();
455 }
456
457 // shut down the StatSampler task
458 StatSampler::disengage();
459 StatSampler::destroy();
460
461 // Shut down string deduplication if running.
462 if (StringDedup::is_enabled()) {
463 StringDedup::stop();
464 }
465
466 // Stop concurrent GC threads
467 Universe::heap()->stop();
468
469 // Print GC/heap related information.
470 Log(gc, heap, exit)LogImpl<(LogTag::_gc), (LogTag::_heap), (LogTag::_exit), (
LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG)> log;
471 if (log.is_info()) {
472 ResourceMark rm;
473 LogStream ls_info(log.info());
474 Universe::print_on(&ls_info);
475 if (log.is_trace()) {
476 LogStream ls_trace(log.trace());
477 MutexLocker mcld(ClassLoaderDataGraph_lock);
478 ClassLoaderDataGraph::print_on(&ls_trace);
479 }
480 }
481
482 if (PrintBytecodeHistogram) {
483 BytecodeHistogram::print();
484 }
485
486#ifdef LINUX1
487 if (DumpPerfMapAtExit) {
488 CodeCache::write_perf_map();
489 }
490#endif
491
492 if (JvmtiExport::should_post_thread_life()) {
493 JvmtiExport::post_thread_end(thread);
494 }
495
496 // Always call even when there are not JVMTI environments yet, since environments
497 // may be attached late and JVMTI must track phases of VM execution
498 JvmtiExport::post_vm_death();
499 Threads::shutdown_vm_agents();
500
501 // Terminate the signal thread
502 // Note: we don't wait until it actually dies.
503 os::terminate_signal_thread();
504
505#if INCLUDE_CDS1
506 if (DynamicArchive::should_dump_at_vm_exit()) {
507 assert(ArchiveClassesAtExit != NULL, "Must be already set")do { if (!(ArchiveClassesAtExit != __null)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 507, "assert(" "ArchiveClassesAtExit != __null" ") failed",
"Must be already set"); ::breakpoint(); } } while (0);
508 ExceptionMark em(thread);
509 DynamicArchive::dump(ArchiveClassesAtExit, thread);
510 if (thread->has_pending_exception()) {
511 ResourceMark rm(thread);
512 oop pending_exception = thread->pending_exception();
513 log_error(cds)(!(LogImpl<(LogTag::_cds), (LogTag::__NO_TAG), (LogTag::__NO_TAG
), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG)
>::is_level(LogLevel::Error))) ? (void)0 : LogImpl<(LogTag
::_cds), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG
), (LogTag::__NO_TAG), (LogTag::__NO_TAG)>::write<LogLevel
::Error>("ArchiveClassesAtExit has failed %s: %s", pending_exception->klass()->external_name(),
514 java_lang_String::as_utf8_string(java_lang_Throwable::message(pending_exception)));
515 thread->clear_pending_exception();
516 }
517 }
518#endif
519
520 print_statistics();
521 Universe::heap()->print_tracing_info();
522
523 { MutexLocker ml(BeforeExit_lock);
524 _before_exit_status = BEFORE_EXIT_DONE;
525 BeforeExit_lock->notify_all();
526 }
527
528 if (VerifyStringTableAtExit) {
529 size_t fail_cnt = StringTable::verify_and_compare_entries();
530 if (fail_cnt != 0) {
531 tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT"%" "l" "u", fail_cnt);
532 guarantee(fail_cnt == 0, "unexpected StringTable verification failures")do { if (!(fail_cnt == 0)) { (*g_assert_poison) = 'X';; report_vm_error
("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 532, "guarantee(" "fail_cnt == 0" ") failed", "unexpected StringTable verification failures"
); ::breakpoint(); } } while (0);
533 }
534 }
535
536 #undef BEFORE_EXIT_NOT_RUN
537 #undef BEFORE_EXIT_RUNNING
538 #undef BEFORE_EXIT_DONE
539}
540
541void vm_exit(int code) {
542 Thread* thread =
543 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL__null;
544 if (thread == NULL__null) {
545 // very early initialization failure -- just exit
546 vm_direct_exit(code);
547 }
548
549 // We'd like to add an entry to the XML log to show that the VM is
550 // terminating, but we can't safely do that here. The logic to make
551 // XML termination logging safe is tied to the termination of the
552 // VMThread, and it doesn't terminate on this exit path. See 8222534.
553
554 if (VMThread::vm_thread() != NULL__null) {
555 if (thread->is_Java_thread()) {
556 // We must be "in_vm" for the code below to work correctly.
557 // Historically there must have been some exit path for which
558 // that was not the case and so we set it explicitly - even
559 // though we no longer know what that path may be.
560 JavaThread::cast(thread)->set_thread_state(_thread_in_vm);
561 }
562
563 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
564 VM_Exit op(code);
565
566 // 4945125 The vm thread comes to a safepoint during exit.
567 // GC vm_operations can get caught at the safepoint, and the
568 // heap is unparseable if they are caught. Grab the Heap_lock
569 // to prevent this. The GC vm_operations will not be able to
570 // queue until after we release it, but we never do that as we
571 // are terminating the VM process.
572 MutexLocker ml(Heap_lock);
573
574 VMThread::execute(&op);
575 // should never reach here; but in case something wrong with VM Thread.
576 vm_direct_exit(code);
577 } else {
578 // VM thread is gone, just exit
579 vm_direct_exit(code);
580 }
581 ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here(
"/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 581); ::breakpoint(); } while (0);
582}
583
584void notify_vm_shutdown() {
585 // For now, just a dtrace probe.
586 HOTSPOT_VM_SHUTDOWN();
587}
588
589void vm_direct_exit(int code) {
590 notify_vm_shutdown();
591 os::wait_for_keypress_at_exit();
592 os::exit(code);
593}
594
595void vm_direct_exit(int code, const char* message) {
596 if (message != nullptr) {
597 tty->print_cr("%s", message);
598 }
599 vm_direct_exit(code);
600}
601
602void vm_perform_shutdown_actions() {
603 if (is_init_completed()) {
604 Thread* thread = Thread::current_or_null();
605 if (thread != NULL__null && thread->is_Java_thread()) {
606 // We are leaving the VM, set state to native (in case any OS exit
607 // handlers call back to the VM)
608 JavaThread* jt = JavaThread::cast(thread);
609 // Must always be walkable or have no last_Java_frame when in
610 // thread_in_native
611 jt->frame_anchor()->make_walkable(jt);
612 jt->set_thread_state(_thread_in_native);
613 }
614 }
615 notify_vm_shutdown();
616}
617
618void vm_shutdown()
619{
620 vm_perform_shutdown_actions();
621 os::wait_for_keypress_at_exit();
622 os::shutdown();
623}
624
625void vm_abort(bool dump_core) {
626 vm_perform_shutdown_actions();
627 os::wait_for_keypress_at_exit();
628
629 // Flush stdout and stderr before abort.
630 fflush(stdoutstdout);
631 fflush(stderrstderr);
632
633 os::abort(dump_core);
634 ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here(
"/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 634); ::breakpoint(); } while (0);
635}
636
637void vm_notify_during_cds_dumping(const char* error, const char* message) {
638 if (error != NULL__null) {
639 tty->print_cr("Error occurred during CDS dumping");
640 tty->print("%s", error);
641 if (message != NULL__null) {
642 tty->print_cr(": %s", message);
643 }
644 else {
645 tty->cr();
646 }
647 }
648}
649
650void vm_exit_during_cds_dumping(const char* error, const char* message) {
651 vm_notify_during_cds_dumping(error, message);
652
653 // Failure during CDS dumping, we don't want to dump core
654 vm_abort(false);
655}
656
657void vm_notify_during_shutdown(const char* error, const char* message) {
658 if (error != NULL__null) {
659 tty->print_cr("Error occurred during initialization of VM");
660 tty->print("%s", error);
661 if (message != NULL__null) {
662 tty->print_cr(": %s", message);
663 }
664 else {
665 tty->cr();
666 }
667 }
668 if (ShowMessageBoxOnError && WizardMode) {
669 fatal("Error occurred during initialization of VM")do { (*g_assert_poison) = 'X';; report_fatal(INTERNAL_ERROR, "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 669, "Error occurred during initialization of VM"); ::breakpoint
(); } while (0);
670 }
671}
672
673void vm_exit_during_initialization() {
674 vm_notify_during_shutdown(NULL__null, NULL__null);
675
676 // Failure during initialization, we don't want to dump core
677 vm_abort(false);
678}
679
680void vm_exit_during_initialization(Handle exception) {
681 tty->print_cr("Error occurred during initialization of VM");
682 // If there are exceptions on this thread it must be cleared
683 // first and here. Any future calls to EXCEPTION_MARK requires
684 // that no pending exceptions exist.
685 JavaThread* THREAD__the_thread__ = JavaThread::current(); // can't be NULL
686 if (HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) {
687 CLEAR_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->clear_pending_exception(
));
688 }
689 java_lang_Throwable::print_stack_trace(exception, tty);
690 tty->cr();
691 vm_notify_during_shutdown(NULL__null, NULL__null);
692
693 // Failure during initialization, we don't want to dump core
694 vm_abort(false);
695}
696
697void vm_exit_during_initialization(Symbol* ex, const char* message) {
698 ResourceMark rm;
699 vm_notify_during_shutdown(ex->as_C_string(), message);
700
701 // Failure during initialization, we don't want to dump core
702 vm_abort(false);
703}
704
705void vm_exit_during_initialization(const char* error, const char* message) {
706 vm_notify_during_shutdown(error, message);
707
708 // Failure during initialization, we don't want to dump core
709 vm_abort(false);
710}
711
712void vm_shutdown_during_initialization(const char* error, const char* message) {
713 vm_notify_during_shutdown(error, message);
714 vm_shutdown();
715}
716
717JDK_Version JDK_Version::_current;
718const char* JDK_Version::_java_version;
719const char* JDK_Version::_runtime_name;
720const char* JDK_Version::_runtime_version;
721const char* JDK_Version::_runtime_vendor_version;
722const char* JDK_Version::_runtime_vendor_vm_bug_url;
723
724void JDK_Version::initialize() {
725 assert(!_current.is_valid(), "Don't initialize twice")do { if (!(!_current.is_valid())) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 725, "assert(" "!_current.is_valid()" ") failed", "Don't initialize twice"
); ::breakpoint(); } } while (0);
726
727 int major = VM_Version::vm_major_version();
728 int minor = VM_Version::vm_minor_version();
729 int security = VM_Version::vm_security_version();
730 int build = VM_Version::vm_build_number();
731 int patch = VM_Version::vm_patch_version();
732 _current = JDK_Version(major, minor, security, patch, build);
733}
734
735void JDK_Version_init() {
736 JDK_Version::initialize();
737}
738
739static int64_t encode_jdk_version(const JDK_Version& v) {
740 return
741 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
742 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
743 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
744 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
745 ((int64_t)v.build_number() << (BitsPerByte * 0));
746}
747
748int JDK_Version::compare(const JDK_Version& other) const {
749 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)")do { if (!(is_valid() && other.is_valid())) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 749, "assert(" "is_valid() && other.is_valid()" ") failed"
, "Invalid version (uninitialized?)"); ::breakpoint(); } } while
(0);
750 uint64_t e = encode_jdk_version(*this);
751 uint64_t o = encode_jdk_version(other);
752 return (e > o) ? 1 : ((e == o) ? 0 : -1);
753}
754
755/* See JEP 223 */
756void JDK_Version::to_string(char* buffer, size_t buflen) const {
757 assert(buffer && buflen > 0, "call with useful buffer")do { if (!(buffer && buflen > 0)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/java.cpp"
, 757, "assert(" "buffer && buflen > 0" ") failed"
, "call with useful buffer"); ::breakpoint(); } } while (0);
758 size_t index = 0;
759
760 if (!is_valid()) {
761 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
762 } else {
763 int rc = jio_snprintf(
764 &buffer[index], buflen - index, "%d.%d", _major, _minor);
765 if (rc == -1) return;
766 index += rc;
767 if (_patch > 0) {
768 rc = jio_snprintf(&buffer[index], buflen - index, ".%d.%d", _security, _patch);
769 if (rc == -1) return;
770 index += rc;
771 } else if (_security > 0) {
772 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
773 if (rc == -1) return;
774 index += rc;
775 }
776 if (_build > 0) {
777 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
778 if (rc == -1) return;
779 index += rc;
Value stored to 'index' is never read
780 }
781 }
782}