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      1 // Copyright 2008 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Flags: --expose-debug-as debug
     29 // Get the Debug object exposed from the debug context global object.
     30 Debug = debug.Debug
     31 
     32 // Simple function which collects a simple call graph.
     33 var call_graph = "";
     34 function listener(event, exec_state, event_data, data) {
     35   if (event == Debug.DebugEvent.Break)
     36   {
     37     call_graph += exec_state.frame().func().name();
     38     exec_state.prepareStep(Debug.StepAction.StepIn);
     39   }
     40 };
     41 
     42 // Add the debug event listener.
     43 Debug.setListener(listener);
     44 
     45 // Test debug event for constructor.
     46 function a() {
     47   new c();
     48 }
     49 
     50 function b() {
     51   x = 1;
     52   new c();
     53 }
     54 
     55 function c() {
     56   this.x = 1;
     57   d();
     58 }
     59 
     60 function d() {
     61 }
     62 
     63 // Break point stops on "new c()" and steps into c.
     64 Debug.setBreakPoint(a, 1);
     65 call_graph = "";
     66 a();
     67 Debug.clearStepping();  // Clear stepping as the listener leaves it on.
     68 assertEquals("accdca", call_graph);
     69 
     70 // Break point stops on "x = 1" and steps to "new c()" and then into c.
     71 Debug.setBreakPoint(b, 1);
     72 call_graph = "";
     73 b();
     74 Debug.clearStepping();  // Clear stepping as the listener leaves it on.
     75 assertEquals("bbccdcb", call_graph);
     76 
     77 // Get rid of the debug event listener.
     78 Debug.setListener(null);
     79