[debug-wrapper] LiveEdit, frame.restart(), breakpoints

test/mjsunit/debug-liveedit-check-stack.js

-// Copyright 2010 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --expose-debug-as debug --allow-natives-syntax
-// Get the Debug object exposed from the debug context global object.
-
-Debug = debug.Debug
-
-unique_id = 1;
-
-function TestBase(name) {
-  print("TestBase constructor: " + name);
-
-  this.ChooseAnimal = eval(
-      "/* " + unique_id + "*/\n" +
-      "(function ChooseAnimal(callback) {\n " +
-      "  callback();\n" +
-      "  return 'Cat';\n" +
-      "})\n"
-  );
-  // Prevents eval script caching.
-  unique_id++;
-
-  var script = Debug.findScript(this.ChooseAnimal);
-
-  var orig_animal = "'Cat'";
-  var patch_pos = script.source.indexOf(orig_animal);
-  var new_animal_patch = "'Capybara'";
-
-  var got_exception = false;
-  var successfully_changed = false;
-
-  // Should be called from Debug context.
-  this.ScriptChanger = function() {
-    assertEquals(false, successfully_changed, "applying patch second time");
-    // Runs in debugger context.
-    var change_log = new Array();
-    try {
-      Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos, orig_animal.length, new_animal_patch, change_log);
-    } finally {
-      print("Change log: " + JSON.stringify(change_log) + "\n");
-    }
-    successfully_changed = true;
-  };
-}
-
-function Noop() {}
-
-function WrapInCatcher(f, holder) {
-  return function() {
-    delete holder[0];
-    try {
-      f();
-    } catch (e) {
-      if (e instanceof Debug.LiveEdit.Failure) {
-        holder[0] = e;
-      } else {
-        throw e;
-      }
-    }
-  };
-}
-
-function WrapInNativeCall(f) {
-  return function() {
-    return %Call(f, undefined);
-  };
-}
-
-function WrapInDebuggerCall(f) {
-  return function() {
-    return %ExecuteInDebugContext(f);
-  };
-}
-
-function WrapInRestartProof(f) {
-  var already_called = false;
-  return function() {
-    if (already_called) {
-      return;
-    }
-    already_called = true;
-    f();
-  }
-}
-
-function WrapInConstructor(f) {
-  return function() {
-    return new function() {
-      f();
-    };
-  }
-}
-
-
-// A series of tests. In each test we call ChooseAnimal function that calls
-// a callback that attempts to modify the function on the fly.
-
-test = new TestBase("First test ChooseAnimal without edit");
-assertEquals("Cat", test.ChooseAnimal(Noop));
-
-test = new TestBase("Test without function on stack");
-test.ScriptChanger();
-assertEquals("Capybara", test.ChooseAnimal(Noop));
-
-test = new TestBase("Test with function on stack");
-assertEquals("Capybara", test.ChooseAnimal(WrapInDebuggerCall(WrapInRestartProof(test.ScriptChanger))));
-
-
-test = new TestBase("Test with function on stack and with constructor frame");
-assertEquals("Capybara", test.ChooseAnimal(WrapInConstructor(WrapInDebuggerCall(WrapInRestartProof(test.ScriptChanger)))));
-
-test = new TestBase("Test with C++ frame above ChooseAnimal frame");
-exception_holder = {};
-assertEquals("Cat", test.ChooseAnimal(WrapInNativeCall(WrapInDebuggerCall(WrapInCatcher(test.ScriptChanger, exception_holder)))));
-assertTrue(!!exception_holder[0]);