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Java example source code file (java.cpp)
The java.cpp Java example source code/* * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "classfile/classLoader.hpp" #include "classfile/symbolTable.hpp" #include "classfile/systemDictionary.hpp" #include "code/codeCache.hpp" #include "compiler/compileBroker.hpp" #include "compiler/compilerOracle.hpp" #include "interpreter/bytecodeHistogram.hpp" #include "memory/genCollectedHeap.hpp" #include "memory/oopFactory.hpp" #include "memory/universe.hpp" #include "oops/constantPool.hpp" #include "oops/generateOopMap.hpp" #include "oops/instanceKlass.hpp" #include "oops/instanceOop.hpp" #include "oops/method.hpp" #include "oops/objArrayOop.hpp" #include "oops/oop.inline.hpp" #include "oops/symbol.hpp" #include "prims/jvmtiExport.hpp" #include "runtime/arguments.hpp" #include "runtime/biasedLocking.hpp" #include "runtime/compilationPolicy.hpp" #include "runtime/fprofiler.hpp" #include "runtime/init.hpp" #include "runtime/interfaceSupport.hpp" #include "runtime/java.hpp" #include "runtime/memprofiler.hpp" #include "runtime/sharedRuntime.hpp" #include "runtime/statSampler.hpp" #include "runtime/task.hpp" #include "runtime/thread.inline.hpp" #include "runtime/timer.hpp" #include "runtime/vm_operations.hpp" #include "services/memReporter.hpp" #include "services/memTracker.hpp" #include "trace/tracing.hpp" #include "utilities/dtrace.hpp" #include "utilities/globalDefinitions.hpp" #include "utilities/histogram.hpp" #include "utilities/macros.hpp" #include "utilities/vmError.hpp" #ifdef TARGET_ARCH_x86 # include "vm_version_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "vm_version_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "vm_version_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "vm_version_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "vm_version_ppc.hpp" #endif #if INCLUDE_ALL_GCS #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" #include "gc_implementation/parallelScavenge/psScavenge.hpp" #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" #endif // INCLUDE_ALL_GCS #ifdef COMPILER1 #include "c1/c1_Compiler.hpp" #include "c1/c1_Runtime1.hpp" #endif #ifdef COMPILER2 #include "code/compiledIC.hpp" #include "compiler/methodLiveness.hpp" #include "opto/compile.hpp" #include "opto/indexSet.hpp" #include "opto/runtime.hpp" #endif #ifndef USDT2 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown); #endif /* !USDT2 */ #ifndef PRODUCT // Statistics printing (method invocation histogram) GrowableArray<Method*>* collected_invoked_methods; void collect_invoked_methods(Method* m) { if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { collected_invoked_methods->push(m); } } GrowableArray<Method*>* collected_profiled_methods; void collect_profiled_methods(Method* m) { Thread* thread = Thread::current(); // This HandleMark prevents a huge amount of handles from being added // to the metadata_handles() array on the thread. HandleMark hm(thread); methodHandle mh(thread, m); if ((m->method_data() != NULL) && (PrintMethodData || CompilerOracle::should_print(mh))) { collected_profiled_methods->push(m); } } int compare_methods(Method** a, Method** b) { // %%% there can be 32-bit overflow here return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); } void print_method_invocation_histogram() { ResourceMark rm; HandleMark hm; collected_invoked_methods = new GrowableArray<Method*>(1024); SystemDictionary::methods_do(collect_invoked_methods); collected_invoked_methods->sort(&compare_methods); // tty->cr(); tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); tty->cr(); tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, synch_total = 0, nativ_total = 0, acces_total = 0; for (int index = 0; index < collected_invoked_methods->length(); index++) { Method* m = collected_invoked_methods->at(index); int c = m->invocation_count() + m->compiled_invocation_count(); if (c >= MethodHistogramCutoff) m->print_invocation_count(); int_total += m->invocation_count(); comp_total += m->compiled_invocation_count(); if (m->is_final()) final_total += c; if (m->is_static()) static_total += c; if (m->is_synchronized()) synch_total += c; if (m->is_native()) nativ_total += c; if (m->is_accessor()) acces_total += c; } tty->cr(); total = int_total + comp_total; tty->print_cr("Invocations summary:"); tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); tty->print_cr("\t%9d (100%%) total", total); tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); tty->cr(); SharedRuntime::print_call_statistics(comp_total); } void print_method_profiling_data() { ResourceMark rm; HandleMark hm; collected_profiled_methods = new GrowableArray<Method*>(1024); SystemDictionary::methods_do(collect_profiled_methods); collected_profiled_methods->sort(&compare_methods); int count = collected_profiled_methods->length(); int total_size = 0; if (count > 0) { for (int index = 0; index < count; index++) { Method* m = collected_profiled_methods->at(index); ttyLocker ttyl; tty->print_cr("------------------------------------------------------------------------"); //m->print_name(tty); m->print_invocation_count(); tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); tty->cr(); // Dump data on parameters if any if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { tty->fill_to(2); m->method_data()->parameters_type_data()->print_data_on(tty); } m->print_codes(); total_size += m->method_data()->size_in_bytes(); } tty->print_cr("------------------------------------------------------------------------"); tty->print_cr("Total MDO size: %d bytes", total_size); } } void print_bytecode_count() { if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); } } AllocStats alloc_stats; // General statistics printing (profiling ...) void print_statistics() { #ifdef ASSERT if (CountRuntimeCalls) { extern Histogram *RuntimeHistogram; RuntimeHistogram->print(); } if (CountJNICalls) { extern Histogram *JNIHistogram; JNIHistogram->print(); } if (CountJVMCalls) { extern Histogram *JVMHistogram; JVMHistogram->print(); } #endif if (MemProfiling) { MemProfiler::disengage(); } if (CITime) { CompileBroker::print_times(); } #ifdef COMPILER1 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); Runtime1::print_statistics(); Deoptimization::print_statistics(); SharedRuntime::print_statistics(); nmethod::print_statistics(); } #endif /* COMPILER1 */ #ifdef COMPILER2 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); Compile::print_statistics(); #ifndef COMPILER1 Deoptimization::print_statistics(); nmethod::print_statistics(); SharedRuntime::print_statistics(); #endif //COMPILER1 os::print_statistics(); } if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) { OptoRuntime::print_named_counters(); } if (TimeLivenessAnalysis) { MethodLiveness::print_times(); } #ifdef ASSERT if (CollectIndexSetStatistics) { IndexSet::print_statistics(); } #endif // ASSERT #endif // COMPILER2 if (CountCompiledCalls) { print_method_invocation_histogram(); } if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) { print_method_profiling_data(); } if (TimeCompiler) { COMPILER2_PRESENT(Compile::print_timers();) } if (TimeCompilationPolicy) { CompilationPolicy::policy()->print_time(); } if (TimeOopMap) { GenerateOopMap::print_time(); } if (ProfilerCheckIntervals) { PeriodicTask::print_intervals(); } if (PrintSymbolTableSizeHistogram) { SymbolTable::print_histogram(); } if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { BytecodeCounter::print(); } if (PrintBytecodePairHistogram) { BytecodePairHistogram::print(); } if (PrintCodeCache) { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); CodeCache::print(); } if (PrintCodeCache2) { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); CodeCache::print_internals(); } if (PrintClassStatistics) { SystemDictionary::print_class_statistics(); } if (PrintMethodStatistics) { SystemDictionary::print_method_statistics(); } if (PrintVtableStats) { klassVtable::print_statistics(); klassItable::print_statistics(); } if (VerifyOops) { tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); } print_bytecode_count(); if (PrintMallocStatistics) { tty->print("allocation stats: "); alloc_stats.print(); tty->cr(); } if (PrintSystemDictionaryAtExit) { SystemDictionary::print(); } if (PrintBiasedLockingStatistics) { BiasedLocking::print_counters(); } #ifdef ENABLE_ZAP_DEAD_LOCALS #ifdef COMPILER2 if (ZapDeadCompiledLocals) { tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); } #endif // COMPILER2 #endif // ENABLE_ZAP_DEAD_LOCALS // Native memory tracking data if (PrintNMTStatistics) { if (MemTracker::is_on()) { BaselineTTYOutputer outputer(tty); MemTracker::print_memory_usage(outputer, K, false); } else { tty->print_cr(MemTracker::reason()); } } } #else // PRODUCT MODE STATISTICS void print_statistics() { if (CITime) { CompileBroker::print_times(); } if (PrintCodeCache) { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); CodeCache::print(); } #ifdef COMPILER2 if (PrintPreciseBiasedLockingStatistics) { OptoRuntime::print_named_counters(); } #endif if (PrintBiasedLockingStatistics) { BiasedLocking::print_counters(); } // Native memory tracking data if (PrintNMTStatistics) { if (MemTracker::is_on()) { BaselineTTYOutputer outputer(tty); MemTracker::print_memory_usage(outputer, K, false); } else { tty->print_cr(MemTracker::reason()); } } } #endif // Helper class for registering on_exit calls through JVM_OnExit extern "C" { typedef void (*__exit_proc)(void); } class ExitProc : public CHeapObj<mtInternal> { private: __exit_proc _proc; // void (*_proc)(void); ExitProc* _next; public: // ExitProc(void (*proc)(void)) { ExitProc(__exit_proc proc) { _proc = proc; _next = NULL; } void evaluate() { _proc(); } ExitProc* next() const { return _next; } void set_next(ExitProc* next) { _next = next; } }; // Linked list of registered on_exit procedures static ExitProc* exit_procs = NULL; extern "C" { void register_on_exit_function(void (*func)(void)) { ExitProc *entry = new ExitProc(func); // Classic vm does not throw an exception in case the allocation failed, if (entry != NULL) { entry->set_next(exit_procs); exit_procs = entry; } } } // Note: before_exit() can be executed only once, if more than one threads // are trying to shutdown the VM at the same time, only one thread // can run before_exit() and all other threads must wait. void before_exit(JavaThread * thread) { #define BEFORE_EXIT_NOT_RUN 0 #define BEFORE_EXIT_RUNNING 1 #define BEFORE_EXIT_DONE 2 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; // Note: don't use a Mutex to guard the entire before_exit(), as // JVMTI post_thread_end_event and post_vm_death_event will run native code. // A CAS or OSMutex would work just fine but then we need to manipulate // thread state for Safepoint. Here we use Monitor wait() and notify_all() // for synchronization. { MutexLocker ml(BeforeExit_lock); switch (_before_exit_status) { case BEFORE_EXIT_NOT_RUN: _before_exit_status = BEFORE_EXIT_RUNNING; break; case BEFORE_EXIT_RUNNING: while (_before_exit_status == BEFORE_EXIT_RUNNING) { BeforeExit_lock->wait(); } assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); return; case BEFORE_EXIT_DONE: return; } } // The only difference between this and Win32's _onexit procs is that // this version is invoked before any threads get killed. ExitProc* current = exit_procs; while (current != NULL) { ExitProc* next = current->next(); current->evaluate(); delete current; current = next; } // Hang forever on exit if we're reporting an error. if (ShowMessageBoxOnError && is_error_reported()) { os::infinite_sleep(); } // Terminate watcher thread - must before disenrolling any periodic task if (PeriodicTask::num_tasks() > 0) WatcherThread::stop(); // Print statistics gathered (profiling ...) if (Arguments::has_profile()) { FlatProfiler::disengage(); FlatProfiler::print(10); } // shut down the StatSampler task StatSampler::disengage(); StatSampler::destroy(); // We do not need to explicitly stop concurrent GC threads because the // JVM will be taken down at a safepoint when such threads are inactive -- // except for some concurrent G1 threads, see (comment in) // Threads::destroy_vm(). // Print GC/heap related information. if (PrintGCDetails) { Universe::print(); AdaptiveSizePolicyOutput(0); if (Verbose) { ClassLoaderDataGraph::dump_on(gclog_or_tty); } } if (PrintBytecodeHistogram) { BytecodeHistogram::print(); } if (JvmtiExport::should_post_thread_life()) { JvmtiExport::post_thread_end(thread); } EventThreadEnd event; if (event.should_commit()) { event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); event.commit(); } // Always call even when there are not JVMTI environments yet, since environments // may be attached late and JVMTI must track phases of VM execution JvmtiExport::post_vm_death(); Threads::shutdown_vm_agents(); // Terminate the signal thread // Note: we don't wait until it actually dies. os::terminate_signal_thread(); print_statistics(); Universe::heap()->print_tracing_info(); { MutexLocker ml(BeforeExit_lock); _before_exit_status = BEFORE_EXIT_DONE; BeforeExit_lock->notify_all(); } // Shutdown NMT before exit. Otherwise, // it will run into trouble when system destroys static variables. MemTracker::shutdown(MemTracker::NMT_normal); if (VerifyStringTableAtExit) { int fail_cnt = 0; { MutexLocker ml(StringTable_lock); fail_cnt = StringTable::verify_and_compare_entries(); } if (fail_cnt != 0) { tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); } } #undef BEFORE_EXIT_NOT_RUN #undef BEFORE_EXIT_RUNNING #undef BEFORE_EXIT_DONE } void vm_exit(int code) { Thread* thread = ThreadLocalStorage::is_initialized() ? ThreadLocalStorage::get_thread_slow() : NULL; if (thread == NULL) { // we have serious problems -- just exit vm_direct_exit(code); } if (VMThread::vm_thread() != NULL) { // Fire off a VM_Exit operation to bring VM to a safepoint and exit VM_Exit op(code); if (thread->is_Java_thread()) ((JavaThread*)thread)->set_thread_state(_thread_in_vm); VMThread::execute(&op); // should never reach here; but in case something wrong with VM Thread. vm_direct_exit(code); } else { // VM thread is gone, just exit vm_direct_exit(code); } ShouldNotReachHere(); } void notify_vm_shutdown() { // For now, just a dtrace probe. #ifndef USDT2 HS_DTRACE_PROBE(hotspot, vm__shutdown); HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); #else /* USDT2 */ HOTSPOT_VM_SHUTDOWN(); #endif /* USDT2 */ } void vm_direct_exit(int code) { notify_vm_shutdown(); os::wait_for_keypress_at_exit(); ::exit(code); } void vm_perform_shutdown_actions() { // Warning: do not call 'exit_globals()' here. All threads are still running. // Calling 'exit_globals()' will disable thread-local-storage and cause all // kinds of assertions to trigger in debug mode. if (is_init_completed()) { Thread* thread = ThreadLocalStorage::is_initialized() ? ThreadLocalStorage::get_thread_slow() : NULL; if (thread != NULL && thread->is_Java_thread()) { // We are leaving the VM, set state to native (in case any OS exit // handlers call back to the VM) JavaThread* jt = (JavaThread*)thread; // Must always be walkable or have no last_Java_frame when in // thread_in_native jt->frame_anchor()->make_walkable(jt); jt->set_thread_state(_thread_in_native); } } notify_vm_shutdown(); } void vm_shutdown() { vm_perform_shutdown_actions(); os::wait_for_keypress_at_exit(); os::shutdown(); } void vm_abort(bool dump_core) { vm_perform_shutdown_actions(); os::wait_for_keypress_at_exit(); os::abort(dump_core); ShouldNotReachHere(); } void vm_notify_during_shutdown(const char* error, const char* message) { if (error != NULL) { tty->print_cr("Error occurred during initialization of VM"); tty->print("%s", error); if (message != NULL) { tty->print_cr(": %s", message); } else { tty->cr(); } } if (ShowMessageBoxOnError && WizardMode) { fatal("Error occurred during initialization of VM"); } } void vm_exit_during_initialization(Handle exception) { tty->print_cr("Error occurred during initialization of VM"); // If there are exceptions on this thread it must be cleared // first and here. Any future calls to EXCEPTION_MARK requires // that no pending exceptions exist. Thread *THREAD = Thread::current(); if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } java_lang_Throwable::print(exception, tty); tty->cr(); java_lang_Throwable::print_stack_trace(exception(), tty); tty->cr(); vm_notify_during_shutdown(NULL, NULL); // Failure during initialization, we don't want to dump core vm_abort(false); } void vm_exit_during_initialization(Symbol* ex, const char* message) { ResourceMark rm; vm_notify_during_shutdown(ex->as_C_string(), message); // Failure during initialization, we don't want to dump core vm_abort(false); } void vm_exit_during_initialization(const char* error, const char* message) { vm_notify_during_shutdown(error, message); // Failure during initialization, we don't want to dump core vm_abort(false); } void vm_shutdown_during_initialization(const char* error, const char* message) { vm_notify_during_shutdown(error, message); vm_shutdown(); } JDK_Version JDK_Version::_current; const char* JDK_Version::_runtime_name; const char* JDK_Version::_runtime_version; void JDK_Version::initialize() { jdk_version_info info; assert(!_current.is_valid(), "Don't initialize twice"); void *lib_handle = os::native_java_library(); jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); if (func == NULL) { // JDK older than 1.6 _current._partially_initialized = true; } else { (*func)(&info, sizeof(info)); int major = JDK_VERSION_MAJOR(info.jdk_version); int minor = JDK_VERSION_MINOR(info.jdk_version); int micro = JDK_VERSION_MICRO(info.jdk_version); int build = JDK_VERSION_BUILD(info.jdk_version); if (major == 1 && minor > 4) { // We represent "1.5.0" as "5.0", but 1.4.2 as itself. major = minor; minor = micro; micro = 0; } _current = JDK_Version(major, minor, micro, info.update_version, info.special_update_version, build, info.thread_park_blocker == 1, info.post_vm_init_hook_enabled == 1, info.pending_list_uses_discovered_field == 1); } } void JDK_Version::fully_initialize( uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { // This is only called when current is less than 1.6 and we've gotten // far enough in the initialization to determine the exact version. assert(major < 6, "not needed for JDK version >= 6"); assert(is_partially_initialized(), "must not initialize"); if (major < 5) { // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. micro = minor; minor = major; major = 1; } _current = JDK_Version(major, minor, micro, update); } void JDK_Version_init() { JDK_Version::initialize(); } static int64_t encode_jdk_version(const JDK_Version& v) { return ((int64_t)v.major_version() << (BitsPerByte * 5)) | ((int64_t)v.minor_version() << (BitsPerByte * 4)) | ((int64_t)v.micro_version() << (BitsPerByte * 3)) | ((int64_t)v.update_version() << (BitsPerByte * 2)) | ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | ((int64_t)v.build_number() << (BitsPerByte * 0)); } int JDK_Version::compare(const JDK_Version& other) const { assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); if (!is_partially_initialized() && other.is_partially_initialized()) { return -(other.compare(*this)); // flip the comparators } assert(!other.is_partially_initialized(), "Not initialized yet"); if (is_partially_initialized()) { assert(other.major_version() >= 6, "Invalid JDK version comparison during initialization"); return -1; } else { uint64_t e = encode_jdk_version(*this); uint64_t o = encode_jdk_version(other); return (e > o) ? 1 : ((e == o) ? 0 : -1); } } void JDK_Version::to_string(char* buffer, size_t buflen) const { size_t index = 0; if (!is_valid()) { jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); } else if (is_partially_initialized()) { jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); } else { index += jio_snprintf( &buffer[index], buflen - index, "%d.%d", _major, _minor); if (_micro > 0) { index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); } if (_update > 0) { index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); } if (_special > 0) { index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); } if (_build > 0) { index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); } } } Other Java examples (source code examples)Here is a short list of links related to this Java java.cpp source code file: |
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