1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecmascript/js_arraybuffer.h"
17
18 #include "ecmascript/base/builtins_base.h"
19 #include "ecmascript/ecma_macros.h"
20 #include "ecmascript/ecma_vm.h"
21 #include "ecmascript/object_factory.h"
22 #include "ecmascript/tagged_array.h"
23 #include "securec.h"
24
25 namespace panda::ecmascript {
CopyDataBlockBytes(JSTaggedValue toBlock,JSTaggedValue fromBlock,int32_t fromIndex,int32_t count)26 void JSArrayBuffer::CopyDataBlockBytes(JSTaggedValue toBlock, JSTaggedValue fromBlock, int32_t fromIndex, int32_t count)
27 {
28 void *fromBuf = JSNativePointer::Cast(fromBlock.GetTaggedObject())->GetExternalPointer();
29 void *toBuf = JSNativePointer::Cast(toBlock.GetTaggedObject())->GetExternalPointer();
30 auto *from = static_cast<uint8_t *>(fromBuf);
31 auto *to = static_cast<uint8_t *>(toBuf);
32 if (memcpy_s(to, count, from + fromIndex, count) != EOK) { // NOLINT
33 LOG_ECMA(FATAL) << "memcpy_s failed";
34 UNREACHABLE();
35 }
36 }
37
Attach(JSThread * thread,uint32_t arrayBufferByteLength,JSTaggedValue arrayBufferData)38 void JSArrayBuffer::Attach(JSThread *thread, uint32_t arrayBufferByteLength, JSTaggedValue arrayBufferData)
39 {
40 ASSERT(arrayBufferData.IsNativePointer());
41 SetArrayBufferByteLength(arrayBufferByteLength);
42 SetArrayBufferData(thread, arrayBufferData);
43 EcmaVM *vm = thread->GetEcmaVM();
44 vm->PushToArrayDataList(JSNativePointer::Cast(arrayBufferData.GetHeapObject()));
45 }
46
Detach(JSThread * thread)47 void JSArrayBuffer::Detach(JSThread *thread)
48 {
49 JSTaggedValue arrayBufferData = GetArrayBufferData();
50 // already detached.
51 if (arrayBufferData.IsNull()) {
52 return;
53 }
54
55 EcmaVM *vm = thread->GetEcmaVM();
56 // remove vm's control over arrayBufferData.
57 JSNativePointer *jsNativePointer = JSNativePointer::Cast(arrayBufferData.GetHeapObject());
58 vm->RemoveArrayDataList(jsNativePointer);
59 jsNativePointer->Destroy();
60
61 SetArrayBufferData(thread, JSTaggedValue::Null());
62 SetArrayBufferByteLength(0);
63 }
64 } // namespace panda::ecmascript
65