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