/*

 * 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();

      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);