// Copyright 2012 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.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
#ifndef V8_ELEMENTS_H_
#define V8_ELEMENTS_H_
-#include "elements-kind.h"
-#include "objects.h"
-#include "heap.h"
-#include "isolate.h"
+#include "src/elements-kind.h"
+#include "src/heap/heap.h"
+#include "src/isolate.h"
+#include "src/objects.h"
namespace v8 {
namespace internal {
// Checks the elements of an object for consistency, asserting when a problem
// is found.
- virtual void Validate(JSObject* obj) = 0;
+ virtual void Validate(Handle<JSObject> obj) = 0;
// Returns true if a holder contains an element with the specified key
// without iterating up the prototype chain. The caller can optionally pass
// in the backing store to use for the check, which must be compatible with
// the ElementsKind of the ElementsAccessor. If backing_store is NULL, the
// holder->elements() is used as the backing store.
- virtual bool HasElement(Object* receiver,
- JSObject* holder,
- uint32_t key,
- FixedArrayBase* backing_store = NULL) = 0;
+ virtual bool HasElement(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
+ uint32_t key,
+ Handle<FixedArrayBase> backing_store) = 0;
+
+ inline bool HasElement(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
+ uint32_t key) {
+ return HasElement(receiver, holder, key, handle(holder->elements()));
+ }
// Returns the element with the specified key or undefined if there is no such
// element. This method doesn't iterate up the prototype chain. The caller
// can optionally pass in the backing store to use for the check, which must
// be compatible with the ElementsKind of the ElementsAccessor. If
// backing_store is NULL, the holder->elements() is used as the backing store.
- MUST_USE_RESULT virtual Handle<Object> Get(
+ MUST_USE_RESULT virtual MaybeHandle<Object> Get(
Handle<Object> receiver,
Handle<JSObject> holder,
uint32_t key,
- Handle<FixedArrayBase> backing_store =
- Handle<FixedArrayBase>::null()) = 0;
+ Handle<FixedArrayBase> backing_store) = 0;
- MUST_USE_RESULT virtual MaybeObject* Get(
- Object* receiver,
- JSObject* holder,
- uint32_t key,
- FixedArrayBase* backing_store = NULL) = 0;
+ MUST_USE_RESULT inline MaybeHandle<Object> Get(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
+ uint32_t key) {
+ return Get(receiver, holder, key, handle(holder->elements()));
+ }
// Returns an element's attributes, or ABSENT if there is no such
// element. This method doesn't iterate up the prototype chain. The caller
// be compatible with the ElementsKind of the ElementsAccessor. If
// backing_store is NULL, the holder->elements() is used as the backing store.
MUST_USE_RESULT virtual PropertyAttributes GetAttributes(
- Object* receiver,
- JSObject* holder,
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
uint32_t key,
- FixedArrayBase* backing_store = NULL) = 0;
+ Handle<FixedArrayBase> backing_store) = 0;
- // Returns an element's type, or NONEXISTENT if there is no such
- // element. This method doesn't iterate up the prototype chain. The caller
- // can optionally pass in the backing store to use for the check, which must
- // be compatible with the ElementsKind of the ElementsAccessor. If
- // backing_store is NULL, the holder->elements() is used as the backing store.
- MUST_USE_RESULT virtual PropertyType GetType(
- Object* receiver,
- JSObject* holder,
- uint32_t key,
- FixedArrayBase* backing_store = NULL) = 0;
+ MUST_USE_RESULT inline PropertyAttributes GetAttributes(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
+ uint32_t key) {
+ return GetAttributes(receiver, holder, key, handle(holder->elements()));
+ }
// Returns an element's accessors, or NULL if the element does not exist or
// is plain. This method doesn't iterate up the prototype chain. The caller
// can optionally pass in the backing store to use for the check, which must
// be compatible with the ElementsKind of the ElementsAccessor. If
// backing_store is NULL, the holder->elements() is used as the backing store.
- MUST_USE_RESULT virtual AccessorPair* GetAccessorPair(
- Object* receiver,
- JSObject* holder,
+ MUST_USE_RESULT virtual MaybeHandle<AccessorPair> GetAccessorPair(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
uint32_t key,
- FixedArrayBase* backing_store = NULL) = 0;
+ Handle<FixedArrayBase> backing_store) = 0;
+
+ MUST_USE_RESULT inline MaybeHandle<AccessorPair> GetAccessorPair(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
+ uint32_t key) {
+ return GetAccessorPair(receiver, holder, key, handle(holder->elements()));
+ }
// Modifies the length data property as specified for JSArrays and resizes the
// underlying backing store accordingly. The method honors the semantics of
// changing array sizes as defined in EcmaScript 5.1 15.4.5.2, i.e. array that
// have non-deletable elements can only be shrunk to the size of highest
// element that is non-deletable.
- MUST_USE_RESULT virtual Handle<Object> SetLength(
+ MUST_USE_RESULT virtual MaybeHandle<Object> SetLength(
Handle<JSArray> holder,
Handle<Object> new_length) = 0;
int length) = 0;
// Deletes an element in an object, returning a new elements backing store.
- MUST_USE_RESULT virtual Handle<Object> Delete(
+ MUST_USE_RESULT virtual MaybeHandle<Object> Delete(
Handle<JSObject> holder,
uint32_t key,
JSReceiver::DeleteMode mode) = 0;
// store is available, it can be passed in source and source_holder is
// ignored.
virtual void CopyElements(
- Handle<JSObject> source_holder,
+ Handle<FixedArrayBase> source,
uint32_t source_start,
ElementsKind source_kind,
Handle<FixedArrayBase> destination,
uint32_t destination_start,
- int copy_size,
- Handle<FixedArrayBase> source = Handle<FixedArrayBase>::null()) = 0;
- MUST_USE_RESULT virtual MaybeObject* CopyElements(
+ int copy_size) = 0;
+
+ // NOTE: this method violates the handlified function signature convention:
+ // raw pointer parameter |source_holder| in the function that allocates.
+ // This is done intentionally to avoid ArrayConcat() builtin performance
+ // degradation.
+ virtual void CopyElements(
JSObject* source_holder,
uint32_t source_start,
ElementsKind source_kind,
- FixedArrayBase* destination,
+ Handle<FixedArrayBase> destination,
uint32_t destination_start,
- int copy_size,
- FixedArrayBase* source = NULL) = 0;
+ int copy_size) = 0;
- void CopyElements(
+ inline void CopyElements(
Handle<JSObject> from_holder,
Handle<FixedArrayBase> to,
- ElementsKind from_kind,
- Handle<FixedArrayBase> from = Handle<FixedArrayBase>::null()) {
- CopyElements(from_holder, 0, from_kind, to, 0,
- kCopyToEndAndInitializeToHole, from);
+ ElementsKind from_kind) {
+ CopyElements(
+ *from_holder, 0, from_kind, to, 0, kCopyToEndAndInitializeToHole);
}
- MUST_USE_RESULT MaybeObject* CopyElements(JSObject* from_holder,
- FixedArrayBase* to,
- ElementsKind from_kind,
- FixedArrayBase* from = NULL) {
- return CopyElements(from_holder, 0, from_kind, to, 0,
- kCopyToEndAndInitializeToHole, from);
- }
+ MUST_USE_RESULT virtual MaybeHandle<FixedArray> AddElementsToFixedArray(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
+ Handle<FixedArray> to,
+ Handle<FixedArrayBase> from) = 0;
- MUST_USE_RESULT virtual MaybeObject* AddElementsToFixedArray(
- Object* receiver,
- JSObject* holder,
- FixedArray* to,
- FixedArrayBase* from = NULL) = 0;
+ MUST_USE_RESULT inline MaybeHandle<FixedArray> AddElementsToFixedArray(
+ Handle<Object> receiver,
+ Handle<JSObject> holder,
+ Handle<FixedArray> to) {
+ return AddElementsToFixedArray(
+ receiver, holder, to, handle(holder->elements()));
+ }
// Returns a shared ElementsAccessor for the specified ElementsKind.
static ElementsAccessor* ForKind(ElementsKind elements_kind) {
- ASSERT(elements_kind < kElementsKindCount);
+ DCHECK(static_cast<int>(elements_kind) < kElementsKindCount);
return elements_accessors_[elements_kind];
}
- static ElementsAccessor* ForArray(FixedArrayBase* array);
+ static ElementsAccessor* ForArray(Handle<FixedArrayBase> array);
static void InitializeOncePerProcess();
static void TearDown();
protected:
friend class SloppyArgumentsElementsAccessor;
- virtual uint32_t GetCapacity(FixedArrayBase* backing_store) = 0;
+ virtual uint32_t GetCapacity(Handle<FixedArrayBase> backing_store) = 0;
// Element handlers distinguish between indexes and keys when they manipulate
// elements. Indexes refer to elements in terms of their location in the
// keys are equivalent to indexes, and GetKeyForIndex returns the same value
// it is passed. In the NumberDictionary ElementsAccessor, GetKeyForIndex maps
// the index to a key using the KeyAt method on the NumberDictionary.
- virtual uint32_t GetKeyForIndex(FixedArrayBase* backing_store,
+ virtual uint32_t GetKeyForIndex(Handle<FixedArrayBase> backing_store,
uint32_t index) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(ElementsAccessor);
};
-void CheckArrayAbuse(JSObject* obj, const char* op, uint32_t key,
+void CheckArrayAbuse(Handle<JSObject> obj, const char* op, uint32_t key,
bool allow_appending = false);
-Handle<Object> ArrayConstructInitializeElements(Handle<JSArray> array,
- Arguments* args);
+MUST_USE_RESULT MaybeHandle<Object> ArrayConstructInitializeElements(
+ Handle<JSArray> array,
+ Arguments* args);
} } // namespace v8::internal
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