jvm 初始化

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void vm_init_globals() {
  check_ThreadShadow();
  basic_types_init();
  eventlog_init();
  mutex_init();
  chunkpool_init();
  perfMemory_init();
}


jint init_globals() {
  HandleMark hm;
  management_init();
  vtune_init();
  bytecodes_init();
  classLoader_init();
  codeCache_init();
  VM_Version_init();
  stubRoutines_init1();
  jint status = universe_init();  // dependent on codeCache_init and stubRoutines_init
  if (status != JNI_OK)
    return status;

  interpreter_init();  // before any methods loaded
  invocationCounter_init();  // before any methods loaded
  marksweep_init();
  accessFlags_init();
  templateTable_init();
  InterfaceSupport_init();
  SharedRuntime::generate_stubs();
  universe2_init();  // dependent on codeCache_init and stubRoutines_init
  referenceProcessor_init();
  jni_handles_init();
#ifndef VM_STRUCTS_KERNEL
  vmStructs_init();
#endif // VM_STRUCTS_KERNEL

  vtableStubs_init();
  InlineCacheBuffer_init();
  compilerOracle_init();
  compilationPolicy_init();
  VMRegImpl::set_regName();

  if (!universe_post_init()) {
    return JNI_ERR;
  }
  javaClasses_init();  // must happen after vtable initialization
  stubRoutines_init2(); // note: StubRoutines need 2-phase init

  // Although we'd like to, we can't easily do a heap verify
  // here because the main thread isn't yet a JavaThread, so
  // its TLAB may not be made parseable from the usual interfaces.
  if (VerifyBeforeGC && !UseTLAB &&
      Universe::heap()->total_collections() >= VerifyGCStartAt) {
    Universe::heap()->prepare_for_verify();
    Universe::verify();   // make sure we're starting with a clean slate
  }

  return JNI_OK;
}


void exit_globals() {
  static bool destructorsCalled = false;
  if (!destructorsCalled) {
    destructorsCalled = true;
    perfMemory_exit();
    if (PrintSafepointStatistics) {
      // Print the collected safepoint statistics.
      SafepointSynchronize::print_stat_on_exit();
    }
    ostream_exit();
  }
}