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      1 // Copyright 2011 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 function sendCommand(state, cmd) {
     33   // Get the debug command processor in paused state.
     34   var dcp = state.debugCommandProcessor(false);
     35   var request = JSON.stringify(cmd);
     36   var response = dcp.processDebugJSONRequest(request);
     37 }
     38 
     39 var state = 0;
     40 
     41 function listener(event, exec_state, event_data, data) {
     42   try {
     43     if (event == Debug.DebugEvent.Break) {
     44       var line = event_data.sourceLineText();
     45       print('break: ' + line);
     46       print('event data: ' + event_data.toJSONProtocol());
     47       print();
     48       assertEquals('// BREAK', line.substr(-8),
     49                    "should not break outside evaluate");
     50 
     51       switch (state) {
     52       case 0:
     53         state = 1;
     54         // While in the debugger and stepping through a set of instructions
     55         // executed in the evaluate command, the stepping must stop at the end
     56         // of the said set of instructions and not step further into native
     57         // debugger code.
     58         sendCommand(exec_state, {
     59           seq : 0,
     60           type : "request",
     61           command : "evaluate",
     62           arguments : {
     63             'expression' : 'print("A"); debugger; print("B"); // BREAK',
     64             'global' : true
     65           }
     66         });
     67         break;
     68       case 1:
     69         sendCommand(exec_state, {
     70           seq : 0,
     71           type : "request",
     72           command : "continue",
     73           arguments : {
     74             stepaction : "next"
     75           }
     76         });
     77         break;
     78       }
     79     }
     80   } catch (e) {
     81     print(e);
     82   }
     83 }
     84 
     85 // Add the debug event listener.
     86 Debug.setListener(listener);
     87 
     88 function a() {
     89 } // BREAK
     90 
     91 // Set a break point and call to invoke the debug event listener.
     92 Debug.setBreakPoint(a, 0, 0);
     93 a();
     94