Cardmarking writebarrier.

src/runtime.cc

 // Copyright 2006-2009 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
@@ skipping 273 matching lines @@
         value = CreateLiteralBoilerplate(literals, array);
         if (value.is_null()) return value;
       }
       Handle<Object> result;
       uint32_t element_index = 0;
       if (key->IsSymbol()) {
         // If key is a symbol it is not an array element.
         Handle<String> name(String::cast(*key));
         ASSERT(!name->AsArrayIndex(&element_index));
         result = SetProperty(boilerplate, name, value, NONE);
-      } else if (Array::IndexFromObject(*key, &element_index)) {
+      } else if (key->ToArrayIndex(&element_index)) {
         // Array index (uint32).
         result = SetElement(boilerplate, element_index, value);
       } else {
         // Non-uint32 number.
         ASSERT(key->IsNumber());
         double num = key->Number();
         char arr[100];
         Vector<char> buffer(arr, ARRAY_SIZE(arr));
         const char* str = DoubleToCString(num, buffer);
         Handle<String> name = Factory::NewStringFromAscii(CStrVector(str));
@@ skipping 1328 matching lines @@
     target->set_literals(*literals, SKIP_WRITE_BARRIER);
   }
 
   target->set_context(*context);
   return *target;
 }
 
 
 static Object* CharCodeAt(String* subject, Object* index) {
   uint32_t i = 0;
-  if (!Array::IndexFromObject(index, &i)) return Heap::nan_value();
+  if (!index->ToArrayIndex(&i)) return Heap::nan_value();
   // Flatten the string.  If someone wants to get a char at an index
   // in a cons string, it is likely that more indices will be
   // accessed.
   Object* flat = subject->TryFlatten();
   if (flat->IsFailure()) return flat;
   subject = String::cast(flat);
   if (i >= static_cast<uint32_t>(subject->length())) {
     return Heap::nan_value();
   }
   return Smi::FromInt(subject->Get(i));
 }
 
 
 static Object* CharFromCode(Object* char_code) {
   uint32_t code;
-  if (Array::IndexFromObject(char_code, &code)) {
+  if (char_code->ToArrayIndex(&code)) {
     if (code <= 0xffff) {
       return Heap::LookupSingleCharacterStringFromCode(code);
     }
   }
   return Heap::empty_string();
 }
 
 
 static Object* Runtime_StringCharCodeAt(Arguments args) {
   NoHandleAllocation ha;
@@ skipping 1160 matching lines @@
 
 static Object* Runtime_StringIndexOf(Arguments args) {
   HandleScope scope;  // create a new handle scope
   ASSERT(args.length() == 3);
 
   CONVERT_ARG_CHECKED(String, sub, 0);
   CONVERT_ARG_CHECKED(String, pat, 1);
 
   Object* index = args[2];
   uint32_t start_index;
-  if (!Array::IndexFromObject(index, &start_index)) return Smi::FromInt(-1);
+  if (!index->ToArrayIndex(&start_index)) return Smi::FromInt(-1);
 
   RUNTIME_ASSERT(start_index <= static_cast<uint32_t>(sub->length()));
   int position = Runtime::StringMatch(sub, pat, start_index);
   return Smi::FromInt(position);
 }
 
 
 template <typename schar, typename pchar>
 static int StringMatchBackwards(Vector<const schar> sub,
                                 Vector<const pchar> pat,
@@ skipping 29 matching lines @@
 
 static Object* Runtime_StringLastIndexOf(Arguments args) {
   HandleScope scope;  // create a new handle scope
   ASSERT(args.length() == 3);
 
   CONVERT_ARG_CHECKED(String, sub, 0);
   CONVERT_ARG_CHECKED(String, pat, 1);
 
   Object* index = args[2];
   uint32_t start_index;
-  if (!Array::IndexFromObject(index, &start_index)) return Smi::FromInt(-1);
+  if (!index->ToArrayIndex(&start_index)) return Smi::FromInt(-1);
 
   uint32_t pat_length = pat->length();
   uint32_t sub_length = sub->length();
 
   if (start_index + pat_length > sub_length) {
     start_index = sub_length - pat_length;
   }
 
   if (pat_length == 0) {
     return Smi::FromInt(start_index);
@@ skipping 806 matching lines @@
   if (object->IsUndefined() || object->IsNull()) {
     Handle<Object> args[2] = { key, object };
     Handle<Object> error =
         Factory::NewTypeError("non_object_property_load",
                               HandleVector(args, 2));
     return Top::Throw(*error);
   }
 
   // Check if the given key is an array index.
   uint32_t index;
-  if (Array::IndexFromObject(*key, &index)) {
+  if (key->ToArrayIndex(&index)) {
     return GetElementOrCharAt(object, index);
   }
 
   // Convert the key to a string - possibly by calling back into JavaScript.
   Handle<String> name;
   if (key->IsString()) {
     name = Handle<String>::cast(key);
   } else {
     bool has_pending_exception = false;
     Handle<Object> converted =
@@ skipping 165 matching lines @@
     return Top::Throw(*error);
   }
 
   // If the object isn't a JavaScript object, we ignore the store.
   if (!object->IsJSObject()) return *value;
 
   Handle<JSObject> js_object = Handle<JSObject>::cast(object);
 
   // Check if the given key is an array index.
   uint32_t index;
-  if (Array::IndexFromObject(*key, &index)) {
+  if (key->ToArrayIndex(&index)) {
     // In Firefox/SpiderMonkey, Safari and Opera you can access the characters
     // of a string using [] notation.  We need to support this too in
     // JavaScript.
     // In the case of a String object we just need to redirect the assignment to
     // the underlying string if the index is in range.  Since the underlying
     // string does nothing with the assignment then we can ignore such
     // assignments.
     if (js_object->IsStringObjectWithCharacterAt(index)) {
       return *value;
     }
@@ skipping 31 matching lines @@
 
 
 Object* Runtime::ForceSetObjectProperty(Handle<JSObject> js_object,
                                         Handle<Object> key,
                                         Handle<Object> value,
                                         PropertyAttributes attr) {
   HandleScope scope;
 
   // Check if the given key is an array index.
   uint32_t index;
-  if (Array::IndexFromObject(*key, &index)) {
+  if (key->ToArrayIndex(&index)) {
     // In Firefox/SpiderMonkey, Safari and Opera you can access the characters
     // of a string using [] notation.  We need to support this too in
     // JavaScript.
     // In the case of a String object we just need to redirect the assignment to
     // the underlying string if the index is in range.  Since the underlying
     // string does nothing with the assignment then we can ignore such
     // assignments.
     if (js_object->IsStringObjectWithCharacterAt(index)) {
       return *value;
     }
@@ skipping 26 matching lines @@
   }
 }
 
 
 Object* Runtime::ForceDeleteObjectProperty(Handle<JSObject> js_object,
                                            Handle<Object> key) {
   HandleScope scope;
 
   // Check if the given key is an array index.
   uint32_t index;
-  if (Array::IndexFromObject(*key, &index)) {
+  if (key->ToArrayIndex(&index)) {
     // In Firefox/SpiderMonkey, Safari and Opera you can access the
     // characters of a string using [] notation.  In the case of a
     // String object we just need to redirect the deletion to the
     // underlying string if the index is in range.  Since the
     // underlying string does nothing with the deletion, we can ignore
     // such deletions.
     if (js_object->IsStringObjectWithCharacterAt(index)) {
       return Heap::true_value();
     }
 
@@ skipping 392 matching lines @@
   JavaScriptFrameIterator it;
   it.AdvanceToArgumentsFrame();
   JavaScriptFrame* frame = it.frame();
 
   // Get the actual number of provided arguments.
   const uint32_t n = frame->GetProvidedParametersCount();
 
   // Try to convert the key to an index. If successful and within
   // index return the the argument from the frame.
   uint32_t index;
-  if (Array::IndexFromObject(args[0], &index) && index < n) {
+  if (args[0]->ToArrayIndex(&index) && index < n) {
     return frame->GetParameter(index);
   }
 
   // Convert the key to a string.
   HandleScope scope;
   bool exception = false;
   Handle<Object> converted =
       Execution::ToString(args.at<Object>(0), &exception);
   if (exception) return Failure::Exception();
   Handle<String> key = Handle<String>::cast(converted);
@@ skipping 2100 matching lines @@
 
   Object* result = Heap::AllocateArgumentsObject(callee, length);
   if (result->IsFailure()) return result;
   // Allocate the elements if needed.
   if (length > 0) {
     // Allocate the fixed array.
     Object* obj = Heap::AllocateRawFixedArray(length);
     if (obj->IsFailure()) return obj;
 
     AssertNoAllocation no_gc;
-    reinterpret_cast<Array*>(obj)->set_map(Heap::fixed_array_map());
-    FixedArray* array = FixedArray::cast(obj);
+    FixedArray* array = reinterpret_cast<FixedArray*>(obj);
+    array->set_map(Heap::fixed_array_map());
     array->set_length(length);
 
     WriteBarrierMode mode = array->GetWriteBarrierMode(no_gc);
     for (int i = 0; i < length; i++) {
       array->set(i, *--parameters, mode);
     }
     JSObject::cast(result)->set_elements(FixedArray::cast(obj));
   }
   return result;
 }
@@ skipping 1268 matching lines @@
 static Object* Runtime_SwapElements(Arguments args) {
   HandleScope handle_scope;
 
   ASSERT_EQ(3, args.length());
 
   CONVERT_ARG_CHECKED(JSObject, object, 0);
   Handle<Object> key1 = args.at<Object>(1);
   Handle<Object> key2 = args.at<Object>(2);
 
   uint32_t index1, index2;
-  if (!Array::IndexFromObject(*key1, &index1)
-      || !Array::IndexFromObject(*key2, &index2)) {
+  if (!key1->ToArrayIndex(&index1)
+      || !key2->ToArrayIndex(&index2)) {
     return Top::ThrowIllegalOperation();
   }
 
   Handle<JSObject> jsobject = Handle<JSObject>::cast(object);
   Handle<Object> tmp1 = GetElement(jsobject, index1);
   Handle<Object> tmp2 = GetElement(jsobject, index2);
 
   SetElement(jsobject, index1, tmp2);
   SetElement(jsobject, index2, tmp1);
 
@@ skipping 10 matching lines @@
   CONVERT_ARG_CHECKED(JSObject, array, 0);
   CONVERT_NUMBER_CHECKED(uint32_t, length, Uint32, args[1]);
   if (array->elements()->IsDictionary()) {
     // Create an array and get all the keys into it, then remove all the
     // keys that are not integers in the range 0 to length-1.
     Handle<FixedArray> keys = GetKeysInFixedArrayFor(array, INCLUDE_PROTOS);
     int keys_length = keys->length();
     for (int i = 0; i < keys_length; i++) {
       Object* key = keys->get(i);
       uint32_t index;
-      if (!Array::IndexFromObject(key, &index) || index >= length) {
+      if (!key->ToArrayIndex(&index) || index >= length) {
         // Zap invalid keys.
         keys->set_undefined(i);
       }
     }
     return *Factory::NewJSArrayWithElements(keys);
   } else {
+    ASSERT(array->HasFastElements());
     Handle<FixedArray> single_interval = Factory::NewFixedArray(2);
     // -1 means start of array.
     single_interval->set(0, Smi::FromInt(-1));
-    uint32_t actual_length = static_cast<uint32_t>(array->elements()->length());
+    uint32_t actual_length =
+        static_cast<uint32_t>(FixedArray::cast(array->elements())->length());
     uint32_t min_length = actual_length < length ? actual_length : length;
     Handle<Object> length_object =
         Factory::NewNumber(static_cast<double>(min_length));
     single_interval->set(1, *length_object);
     return *Factory::NewJSArrayWithElements(single_interval);
   }
 }
 
 
 // DefineAccessor takes an optional final argument which is the
@@ skipping 2426 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal