diff options
Diffstat (limited to 'js/src/jsarray.cpp')
| -rw-r--r-- | js/src/jsarray.cpp | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/js/src/jsarray.cpp b/js/src/jsarray.cpp index 74f7c7c58..1c2b61667 100644 --- a/js/src/jsarray.cpp +++ b/js/src/jsarray.cpp @@ -2133,6 +2133,20 @@ SetInitializedLength(JSContext* cx, NativeObject* obj, size_t initlen) } static DenseElementResult +MoveDenseElements(JSContext* cx, NativeObject* obj, uint32_t dstStart, uint32_t srcStart, + uint32_t length) +{ + if (obj->denseElementsAreFrozen()) + return DenseElementResult::Incomplete; + + if (!obj->maybeCopyElementsForWrite(cx)) + return DenseElementResult::Failure; + obj->moveDenseElements(dstStart, srcStart, length); + + return DenseElementResult::Success; +} + +static DenseElementResult ArrayShiftDenseKernel(JSContext* cx, HandleObject obj, MutableHandleValue rval) { if (ObjectMayHaveExtraIndexedProperties(obj)) @@ -2153,7 +2167,7 @@ ArrayShiftDenseKernel(JSContext* cx, HandleObject obj, MutableHandleValue rval) if (rval.isMagic(JS_ELEMENTS_HOLE)) rval.setUndefined(); - DenseElementResult result = MoveBoxedOrUnboxedDenseElements(cx, obj, 0, 1, initlen - 1); + DenseElementResult result = MoveDenseElements(cx, &obj->as<NativeObject>(), 0, 1, initlen - 1); if (result != DenseElementResult::Success) return result; @@ -2496,8 +2510,7 @@ js::array_splice_impl(JSContext* cx, unsigned argc, Value* vp, bool returnValueI if (CanOptimizeForDenseStorage(obj, 0, len, cx)) { /* Steps 15.a-b. */ DenseElementResult result = - MoveBoxedOrUnboxedDenseElements(cx, obj, targetIndex, sourceIndex, - len - sourceIndex); + MoveDenseElements(cx, &obj->as<NativeObject>(), targetIndex, sourceIndex, len - sourceIndex); MOZ_ASSERT(result != DenseElementResult::Incomplete); if (result == DenseElementResult::Failure) return false; @@ -2583,9 +2596,9 @@ js::array_splice_impl(JSContext* cx, unsigned argc, Value* vp, bool returnValueI if (CanOptimizeForDenseStorage(obj, len, itemCount - actualDeleteCount, cx)) { DenseElementResult result = - MoveBoxedOrUnboxedDenseElements(cx, obj, actualStart + itemCount, - actualStart + actualDeleteCount, - len - (actualStart + actualDeleteCount)); + MoveDenseElements(cx, &obj->as<NativeObject>(), actualStart + itemCount, + actualStart + actualDeleteCount, + len - (actualStart + actualDeleteCount)); MOZ_ASSERT(result != DenseElementResult::Incomplete); if (result == DenseElementResult::Failure) return false; |