Make debugger step into bound callbacks passed to Array.forEach.

src/array.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 "use strict";
 
 // This file relies on the fact that the following declarations have been made
 // in runtime.js:
 // var $Array = global.Array;
 
@@ skipping 1138 matching lines @@
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
   } else {
     needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
   }
 
   var result = new $Array();
   var accumulator = new InternalArray();
   var accumulator_length = 0;
   var is_array = IS_ARRAY(array);
-  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
+  var stepping = DEBUG_IS_STEPPING();
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
       // Prepare break slots for debugger step in.
       if (stepping) %DebugPrepareStepInIfStepping(f);
       var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
       if (%_CallFunction(new_receiver, element, i, array, f)) {
         accumulator[accumulator_length++] = element;
       }
     }
@@ skipping 15 matching lines @@
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   var needs_wrapper = false;
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
   } else {
     needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
   }
 
   var is_array = IS_ARRAY(array);
-  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
+  var stepping = DEBUG_IS_STEPPING();
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
       // Prepare break slots for debugger step in.
       if (stepping) %DebugPrepareStepInIfStepping(f);
       var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
       %_CallFunction(new_receiver, element, i, array, f);
     }
   }
 }
@@ skipping 13 matching lines @@
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   var needs_wrapper = false;
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
   } else {
     needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
   }
 
   var is_array = IS_ARRAY(array);
-  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
+  var stepping = DEBUG_IS_STEPPING();
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
       // Prepare break slots for debugger step in.
       if (stepping) %DebugPrepareStepInIfStepping(f);
       var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
       if (%_CallFunction(new_receiver, element, i, array, f)) return true;
     }
   }
   return false;
@@ skipping 12 matching lines @@
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   var needs_wrapper = false;
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
   } else {
     needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
   }
 
   var is_array = IS_ARRAY(array);
-  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
+  var stepping = DEBUG_IS_STEPPING();
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
       // Prepare break slots for debugger step in.
       if (stepping) %DebugPrepareStepInIfStepping(f);
       var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
       if (!%_CallFunction(new_receiver, element, i, array, f)) return false;
     }
   }
   return true;
@@ skipping 13 matching lines @@
   var needs_wrapper = false;
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
   } else {
     needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
   }
 
   var result = new $Array();
   var accumulator = new InternalArray(length);
   var is_array = IS_ARRAY(array);
-  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
+  var stepping = DEBUG_IS_STEPPING();
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
       // Prepare break slots for debugger step in.
       if (stepping) %DebugPrepareStepInIfStepping(f);
       var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
       accumulator[i] = %_CallFunction(new_receiver, element, i, array, f);
     }
   }
   %MoveArrayContents(accumulator, result);
@@ skipping 129 matching lines @@
     for (; i < length; i++) {
       if (HAS_INDEX(array, i, is_array)) {
         current = array[i++];
         break find_initial;
       }
     }
     throw MakeTypeError('reduce_no_initial', []);
   }
 
   var receiver = %GetDefaultReceiver(callback);
-  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(callback);
+  var stepping = DEBUG_IS_STEPPING();
   for (; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
       // Prepare break slots for debugger step in.
       if (stepping) %DebugPrepareStepInIfStepping(callback);
       current = %_CallFunction(receiver, current, element, i, array, callback);
     }
   }
   return current;
 }
@@ skipping 16 matching lines @@
     for (; i >= 0; i--) {
       if (HAS_INDEX(array, i, is_array)) {
         current = array[i--];
         break find_initial;
       }
     }
     throw MakeTypeError('reduce_no_initial', []);
   }
 
   var receiver = %GetDefaultReceiver(callback);
-  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(callback);
+  var stepping = DEBUG_IS_STEPPING();
   for (; i >= 0; i--) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
       // Prepare break slots for debugger step in.
       if (stepping) %DebugPrepareStepInIfStepping(callback);
       current = %_CallFunction(receiver, current, element, i, array, callback);
     }
   }
   return current;
 }
@@ skipping 87 matching lines @@
   ));
 
   SetUpLockedPrototype(InternalPackedArray, $Array(), $Array(
     "join", getFunction("join", ArrayJoin),
     "pop", getFunction("pop", ArrayPop),
     "push", getFunction("push", ArrayPush)
   ));
 }
 
 SetUpArray();