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      1 // Copyright 2012 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 var exception = false;
     33 
     34 function sendCommand(state, cmd) {
     35   // Get the debug command processor in paused state.
     36   var dcp = state.debugCommandProcessor(false);
     37   var request = JSON.stringify(cmd);
     38   var response = dcp.processDebugJSONRequest(request);
     39 }
     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 
     47       assertEquals(-1, line.indexOf('NOBREAK'),
     48                    "should not break on unexpected lines")
     49       assertEquals('BREAK ' + breaks, line.substr(-7));
     50       breaks++;
     51       if (breaks < 4) {
     52         sendCommand(exec_state, {
     53           seq: 0,
     54           type: "request",
     55           command: "continue",
     56           arguments: { stepaction: "next" }
     57         });
     58       }
     59     }
     60   } catch (e) {
     61     print(e);
     62     exception = true;
     63   }
     64 }
     65 
     66 // Add the debug event listener.
     67 Debug.setListener(listener);
     68 
     69 function a(f) {
     70   if (f) {  // NOBREAK: should not break here!
     71     try {
     72       f();
     73     } catch(e) {
     74     }
     75   }
     76 }  // BREAK 2
     77 
     78 function b() {
     79   c();  // BREAK 0
     80 }  // BREAK 1
     81 
     82 function c() {
     83   a();
     84 }
     85 
     86 // Set a break point and call to invoke the debug event listener.
     87 Debug.setBreakPoint(b, 0, 0);
     88 a(b);
     89 a(); // BREAK 3
     90 
     91 assertFalse(exception);
     92