C++ methodOop::is_native方法代码示例

int CppInterpreter::native_entry(methodOop method, intptr_t UNUSED, TRAPS) {
  // Make sure method is native and not abstract
  assert(method->is_native() && !method->is_abstract(), "should be");

  JavaThread *thread = (JavaThread *) THREAD;
  ZeroStack *stack = thread->zero_stack();

  // Allocate and initialize our frame
  InterpreterFrame *frame = InterpreterFrame::build(method, CHECK_0);
  thread->push_zero_frame(frame);
  interpreterState istate = frame->interpreter_state();
  intptr_t *locals = istate->locals();

  // Update the invocation counter
  if ((UseCompiler || CountCompiledCalls) && !method->is_synchronized()) {
    InvocationCounter *counter = method->invocation_counter();
    counter->increment();
    if (counter->reached_InvocationLimit()) {
      CALL_VM_NOCHECK(
        InterpreterRuntime::frequency_counter_overflow(thread, NULL));
      if (HAS_PENDING_EXCEPTION)
        goto unwind_and_return;
    }
  }

  // Lock if necessary
  BasicObjectLock *monitor;
  monitor = NULL;
  if (method->is_synchronized()) {
    monitor = (BasicObjectLock*) istate->stack_base();
    oop lockee = monitor->obj();
    markOop disp = lockee->mark()->set_unlocked();

    monitor->lock()->set_displaced_header(disp);
    if (Atomic::cmpxchg_ptr(monitor, lockee->mark_addr(), disp) != disp) {
      if (thread->is_lock_owned((address) disp->clear_lock_bits())) {
        monitor->lock()->set_displaced_header(NULL);
      }
      else {
        CALL_VM_NOCHECK(InterpreterRuntime::monitorenter(thread, monitor));
        if (HAS_PENDING_EXCEPTION)
          goto unwind_and_return;
      }
    }
  }

  // Get the signature handler
  InterpreterRuntime::SignatureHandler *handler; {
    address handlerAddr = method->signature_handler();
    if (handlerAddr == NULL) {
      CALL_VM_NOCHECK(InterpreterRuntime::prepare_native_call(thread, method));
      if (HAS_PENDING_EXCEPTION)
        goto unlock_unwind_and_return;

      handlerAddr = method->signature_handler();
      assert(handlerAddr != NULL, "eh?");
    }
    if (handlerAddr == (address) InterpreterRuntime::slow_signature_handler) {
      CALL_VM_NOCHECK(handlerAddr =
        InterpreterRuntime::slow_signature_handler(thread, method, NULL,NULL));
      if (HAS_PENDING_EXCEPTION)
        goto unlock_unwind_and_return;
    }
    handler = \
      InterpreterRuntime::SignatureHandler::from_handlerAddr(handlerAddr);
  }

  // Get the native function entry point
  address function;
  function = method->native_function();
  assert(function != NULL, "should be set if signature handler is");

  // Build the argument list
  stack->overflow_check(handler->argument_count() * 2, THREAD);
  if (HAS_PENDING_EXCEPTION)
    goto unlock_unwind_and_return;

  void **arguments;
  void *mirror; {
    arguments =
      (void **) stack->alloc(handler->argument_count() * sizeof(void **));
    void **dst = arguments;

    void *env = thread->jni_environment();
    *(dst++) = &env;

    if (method->is_static()) {
      istate->set_oop_temp(
        method->constants()->pool_holder()->java_mirror());
      mirror = istate->oop_temp_addr();
      *(dst++) = &mirror;
    }

    intptr_t *src = locals;
    for (int i = dst - arguments; i < handler->argument_count(); i++) {
      ffi_type *type = handler->argument_type(i);
      if (type == &ffi_type_pointer) {
        if (*src) {
          stack->push((intptr_t) src);
          *(dst++) = stack->sp();
//.........这里部分代码省略.........

void vframe::print_xml_on(JavaThread *thread, xmlBuffer *xb) const {
  ResourceMark rm;
  frame fr = get_frame();

  const char *frame_style = "UNKNOWN";
CodeBlob*cb=CodeCache::find_blob(fr.pc());
  if( fr.is_interpreted_frame() ) 
    frame_style = "INTERPRETER";
  else if( cb && cb->is_native_method() ) 
    frame_style = "NATIVE";
  else if( cb && cb->is_c1_method() )
    frame_style = "COMPILER1";
  else if( cb && cb->is_c2_method() )
    frame_style = "COMPILER2";

  // Frame header
  xb->name_value_item("frame_style",frame_style);

  // Java Locals
  if (!fr.is_java_frame()) 
    return; // no more printing to be done
  
  const methodOop moop = method();
  if (moop->is_native()) 
    return; // no more printing to be done
  
  const int max_locals = moop->max_locals();
  
if(fr.is_compiled_frame()){
    for( int i=0; i<max_locals; i++ ) {
      xmlElement je(xb, "java_element");
      { xmlElement n(xb, "name", xmlElement::delayed_LF);
        bool out_of_scope = true;
        const char* name = moop->localvariable_name(i, bci(), out_of_scope);
        if( name ) xb->print("%s%s%s", out_of_scope ? "{": "", name, out_of_scope ? "}": "");
        else       xb->print("JL%-2d", i);
      }
      DebugScopeValue::Name vreg = _ds->get_local(i);
      if( !DebugScopeValue::is_valid(vreg) ) {
        xb->name_value_item("type","invalid");
        xb->name_ptr_item("value",0);
      } else {
        intptr_t *data_ptr = fr.reg_to_addr(DebugScopeValue::to_vreg(vreg));
        const int rel_pc = cb->rel_pc(fr.pc());
        const bool isoop = cb->oop_maps()->is_oop( rel_pc, VReg::as_VOopReg(DebugScopeValue::to_vreg(vreg)) );
        if( isoop ) {
          xb->name_value_item("type", "oop");
          oop o = ((objectRef*)data_ptr)->as_oop();
          o->print_xml_on(xb, true);
        } else {
          xb->name_value_item("type", "normal");
          xb->name_ptr_item("value", (void*)*data_ptr);
        }
      }
    }
}else if(fr.is_interpreted_frame()){
    for( int i = 0; i < max_locals; i++ ) {
      frame::InterpreterStackSlotType tag = fr.tag_at_address(fr.interpreter_frame_local_addr(i));
      if (tag == frame::double_slot_primitive_type)
i++;//skip the tag slot
      xmlElement je(xb, "java_element");
      { xmlElement n(xb, "name", xmlElement::delayed_LF);
        bool out_of_scope = true;
        const char* name = moop->localvariable_name(i, bci(), out_of_scope);
        if (name != NULL) {
          xb->print("%s%s%s", out_of_scope ? "{": "", name, out_of_scope ? "}": "");
        } else {
          xb->print("JL%-2d", i);
        }
      }
      intptr_t local_value = fr.interpreter_frame_local_at(i);
      switch (tag) {
      case frame::single_slot_primitive_type: {
        xb->name_value_item("type", "single_slot_primitive_type");
        xb->name_ptr_item("value", (void*)local_value);
        break;
      }
      case frame::double_slot_primitive_type: {
        xb->name_value_item("type", "double_slot_primitive_type");
        xb->name_ptr_item("value", (void*)local_value);
        break;
      }
      case frame::single_slot_ref_type: {
        xb->name_value_item("type", "oop");
        oop o = objectRef((uint64_t)local_value).as_oop();
        o->print_xml_on(xb, true);
        break;
      }
      default: ShouldNotReachHere(); break;
      }
    }
  }
}