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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 var breaks = 0;
     32 
     33 function sendCommand(state, cmd) {
     34   // Get the debug command processor in paused state.
     35   var dcp = state.debugCommandProcessor(false);
     36   var request = JSON.stringify(cmd);
     37   var response = dcp.processDebugJSONRequest(request);
     38 }
     39 
     40 function listener(event, exec_state, event_data, data) {
     41   try {
     42     if (event == Debug.DebugEvent.Break) {
     43       var line = event_data.sourceLineText();
     44       print('break: ' + line);
     45 
     46       assertEquals(-1, line.indexOf('NOBREAK'),
     47                    "should not break on unexpected lines")
     48       assertEquals('BREAK ' + breaks, line.substr(-7));
     49       breaks++;
     50       sendCommand(exec_state, {
     51         seq: 0,
     52         type: "request",
     53         command: "continue",
     54         arguments: { stepaction: "next" }
     55       });
     56     }
     57   } catch (e) {
     58     print(e);
     59   }
     60 }
     61 
     62 // Add the debug event listener.
     63 Debug.setListener(listener);
     64 
     65 function a(f) {
     66   if (f) {  // NOBREAK: should not break here!
     67     try {
     68       f();
     69     } catch(e) {
     70     }
     71   }
     72 }  // BREAK 2
     73 
     74 function b() {
     75   c();  // BREAK 0
     76 }  // BREAK 1
     77 
     78 function c() {
     79   a();
     80 }
     81 
     82 // Set a break point and call to invoke the debug event listener.
     83 Debug.setBreakPoint(b, 0, 0);
     84 a(b);
     85 // BREAK 3
     86