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      1 // Copyright 2010 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.
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     14 //       from this software without specific prior written permission.
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     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 --noalways-opt
     29 // Get the Debug object exposed from the debug context global object.
     30 
     31 
     32 Debug = debug.Debug
     33 
     34 eval("function ChooseAnimal(p) {\n " +
     35      "  if (p == 7) {\n" + // Use p
     36      "    return;\n" +
     37      "  }\n" +
     38      "  return function Chooser() {\n" +
     39      "    return 'Cat';\n" +
     40      "  };\n" +
     41      "}\n");
     42 
     43 var old_closure = ChooseAnimal(19);
     44 
     45 assertEquals("Cat", old_closure());
     46 
     47 var script = Debug.findScript(ChooseAnimal);
     48 
     49 var orig_animal = "'Cat'";
     50 var patch_pos = script.source.indexOf(orig_animal);
     51 var new_animal_patch = "'Capybara' + p";
     52 
     53 // We patch innermost function "Chooser".
     54 // However, this does not actually patch existing "Chooser" instances,
     55 // because old value of parameter "p" was not saved.
     56 // Instead it patches ChooseAnimal.
     57 var change_log = new Array();
     58 Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos, orig_animal.length, new_animal_patch, change_log);
     59 print("Change log: " + JSON.stringify(change_log) + "\n");
     60 
     61 var new_closure = ChooseAnimal(19);
     62 // New instance of closure is patched.
     63 assertEquals("Capybara19", new_closure());
     64 
     65 // Old instance of closure is not patched.
     66 assertEquals("Cat", old_closure());
     67