[debugger] Further stepping support in test wrapper

test/mjsunit/debug-step-stub-callfunction.js

-// Copyright 2008 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --expose-debug-as debug
-// Get the Debug object exposed from the debug context global object.
-Debug = debug.Debug
-
-// Simple debug event handler which counts the number of breaks hit and steps.
-var break_break_point_hit_count = 0;
-function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Break) {
-    break_break_point_hit_count++;
-    // Continue stepping until returned to bottom frame.
-    if (exec_state.frameCount() > 1) {
-      exec_state.prepareStep(Debug.StepAction.StepIn);
-    }
-  }
-};
-
-// Add the debug event listener.
-Debug.setListener(listener);
-
-// Use 'eval' to ensure that the call to print is through CodeStub CallFunction.
-// See Ia32CodeGenerator::VisitCall and Ia32CodeGenerator::CallWithArguments.
-function f() {
-  debugger;
-  eval('');
-  print('Hello, world!');
-};
-
-break_break_point_hit_count = 0;
-f();
-assertEquals(6, break_break_point_hit_count);
-
-// Use an inner function to ensure that the function call is through CodeStub
-// CallFunction see Ia32CodeGenerator::VisitCall and
-// Ia32CodeGenerator::CallWithArguments.
-function g() {
-  function h() {}
-  debugger;
-  h();
-};
-
-break_break_point_hit_count = 0;
-g();
-assertEquals(5, break_break_point_hit_count);
-
-
-// Use an inner function to ensure that the function call is through CodeStub
-// CallFunction.
-function testCallInExpreesion() {
-  function h() {}
-  debugger;
-  var x = 's' + h(10, 20);
-};
-
-break_break_point_hit_count = 0;
-testCallInExpreesion();
-assertEquals(5, break_break_point_hit_count);
-
-
-// Get rid of the debug event listener.
-Debug.setListener(null);