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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 // The functions used for testing backtraces. They are at the top to make the
     30 // testing of source line/column easier.
     31 function f(x, y) {
     32   a=1;
     33 };
     34 
     35 function g() {
     36   new f(1);
     37 };
     38 
     39 
     40 // Get the Debug object exposed from the debug context global object.
     41 Debug = debug.Debug
     42 
     43 listenerCallCount = 0;
     44 listenerExceptions = [];
     45 
     46 
     47 function listener(event, exec_state, event_data, data) {
     48   try {
     49   if (event == Debug.DebugEvent.Break)
     50   {
     51     listenerCallCount++;
     52 
     53     // Check that mirror cache is cleared when entering debugger.
     54     assertEquals(0, debug.next_handle_, "Mirror cache not cleared");
     55     assertEquals(0, debug.mirror_cache_.length, "Mirror cache not cleared");
     56 
     57     // Get the debug command processor in paused state.
     58     var dcp = exec_state.debugCommandProcessor(false);
     59 
     60     // Make a backtrace request to create some mirrors.
     61     var json;
     62     json = '{"seq":0,"type":"request","command":"backtrace"}'
     63     dcp.processDebugJSONRequest(json);
     64 
     65     // Some mirrors where cached.
     66     assertFalse(debug.next_handle_ == 0, "Mirror cache not used");
     67     assertFalse(debug.mirror_cache_.length == 0, "Mirror cache not used");
     68   }
     69   } catch (e) {
     70     print(e);
     71     listenerExceptions.push(e);
     72   };
     73 };
     74 
     75 // Add the debug event listener.
     76 Debug.setListener(listener);
     77 
     78 // Enter the debugger twice.
     79 debugger;
     80 debugger;
     81 
     82 assertEquals([], listenerExceptions, "Exception in listener");
     83 // Make sure that the debug event listener vas invoked.
     84 assertEquals(2, listenerCallCount, "Listener not called");
     85