[debugger] Stepping and break-related functions in wrapper

test/mjsunit/debug-constructor.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
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-//       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
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-// 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 function which collects a simple call graph.
-var call_graph = "";
-function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Break)
-  {
-    call_graph += exec_state.frame().func().name();
-    exec_state.prepareStep(Debug.StepAction.StepIn);
-  }
-};
-
-// Add the debug event listener.
-Debug.setListener(listener);
-
-// Test debug event for constructor.
-function a() {
-  new c();
-}
-
-function b() {
-  x = 1;
-  new c();
-}
-
-function c() {
-  this.x = 1;
-  d();
-}
-
-function d() {
-}
-
-// Break point stops on "new c()" and steps into c.
-Debug.setBreakPoint(a, 1);
-call_graph = "";
-a();
-Debug.clearStepping();  // Clear stepping as the listener leaves it on.
-assertEquals("accdca", call_graph);
-
-// Break point stops on "x = 1" and steps to "new c()" and then into c.
-Debug.setBreakPoint(b, 1);
-call_graph = "";
-b();
-Debug.clearStepping();  // Clear stepping as the listener leaves it on.
-assertEquals("bbccdcb", call_graph);
-
-// Get rid of the debug event listener.
-Debug.setListener(null);