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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 
     31 Debug = debug.Debug;
     32 Debug.setListener(listener);
     33 
     34 SlimFunction = eval(
     35     "(function() {\n " +
     36     "  return 'Cat';\n" +
     37     "})\n"
     38 );
     39 
     40 var script = Debug.findScript(SlimFunction);
     41 
     42 Debug.setScriptBreakPointById(script.id, 1, 0);
     43 
     44 var orig_animal = "'Cat'";
     45 var patch_pos = script.source.indexOf(orig_animal);
     46 var new_animal_patch = "'Capybara'";
     47 
     48 debugger_handler = (function() {
     49   var already_called = false;
     50   return function() {
     51     if (already_called) {
     52       return;
     53     }
     54     already_called = true;
     55 
     56     var change_log = new Array();
     57     try {
     58       Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos,
     59           orig_animal.length, new_animal_patch, change_log);
     60     } finally {
     61       print("Change log: " + JSON.stringify(change_log) + "\n");
     62     }
     63   };
     64 })();
     65 
     66 var saved_exception = null;
     67 
     68 function listener(event, exec_state, event_data, data) {
     69   if (event == Debug.DebugEvent.Break) {
     70     try {
     71       debugger_handler();
     72     } catch (e) {
     73       saved_exception = e;
     74     }
     75   } else {
     76     print("Other: " + event);
     77   }
     78 }
     79 
     80 
     81 var animal = SlimFunction();
     82 
     83 if (saved_exception) {
     84   print("Exception: " + saved_exception);
     85   assertUnreachable();
     86 }
     87 
     88 assertEquals("Capybara", animal);
     89 
     90 Debug.setListener(null);
     91