v8/test/mjsunit/debug-stepout-to-builtin.js

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// Flags: --expose-debug-as debug

// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug

var exception = null;
var state = 1;
var expected_source_line_text = null;
var expected_function_name = null;

// Simple debug event handler which first time will cause 'step out' action
// and than check that execution is paused inside function
// expected_function_name.
function listener(event, exec_state, event_data, data) {
  try {
    if (event == Debug.DebugEvent.Break) {
      if (state == 1) {
        exec_state.prepareStep(Debug.StepAction.StepOut, 2);
        state = 2;
      } else if (state == 2) {
        assertEquals(expected_function_name, event_data.func().name());
        assertEquals(expected_source_line_text,
                     event_data.sourceLineText());
        state = 3;
      }
    }
  } catch(e) {
    exception = e;
  }
};

// Add the debug event listener.
Debug.setListener(listener);

var obj = {key:10};

function replacer(key, value) {
  if (key == 'key') {
    debugger;
  }
  return value;
}

// Test step into function call from a function without local variables.
function testStepOutToBuiltIn() {
  expected_function_name = 'testStepOutToBuiltIn';
  expected_source_line_text = '}  // expected line';
  JSON.stringify(obj, replacer);
}  // expected line

state = 1;
testStepOutToBuiltIn();
assertNull(exception);
assertEquals(3, state);

// Get rid of the debug event listener.
Debug.setListener(null);