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/js_tagged_value-inl.h"
19 #include "ecmascript/mem/barriers-inl.h"
20 #include "ecmascript/object_factory.h"
21 #include "ecmascript/platform/os.h"
22
23 namespace panda::ecmascript {
CopyDataBlockBytes(JSTaggedValue toBlock,JSTaggedValue fromBlock,int32_t fromIndex,int32_t count)24 void JSArrayBuffer::CopyDataBlockBytes(JSTaggedValue toBlock, JSTaggedValue fromBlock, int32_t fromIndex, int32_t count)
25 {
26 void *fromBuf = JSNativePointer::Cast(fromBlock.GetTaggedObject())->GetExternalPointer();
27 void *toBuf = JSNativePointer::Cast(toBlock.GetTaggedObject())->GetExternalPointer();
28 CopyDataPointBytes(toBuf, fromBuf, fromIndex, count);
29 }
30
CopyDataPointBytes(void * toBuf,void * fromBuf,int32_t fromIndex,int32_t count)31 void JSArrayBuffer::CopyDataPointBytes(void *toBuf, void *fromBuf, int32_t fromIndex, int32_t count)
32 {
33 auto *from = static_cast<uint8_t *>(fromBuf);
34 auto *to = static_cast<uint8_t *>(toBuf);
35 if (memcpy_s(to, count, from + fromIndex, count) != EOK) { // NOLINT
36 LOG_FULL(FATAL) << "memcpy_s failed";
37 UNREACHABLE();
38 }
39 }
40
Attach(JSThread * thread,uint32_t arrayBufferByteLength,JSTaggedValue arrayBufferData,bool transferWithNativeAreaAllocator)41 void JSArrayBuffer::Attach(JSThread *thread, uint32_t arrayBufferByteLength,
42 JSTaggedValue arrayBufferData, bool transferWithNativeAreaAllocator)
43 {
44 ASSERT(arrayBufferData.IsJSNativePointer());
45 // only in transition, should the JSArrayBuffer with NativeAreaAllocator increase mem usage
46 if (transferWithNativeAreaAllocator) {
47 LOG_FULL(DEBUG) << "attaching for transfer";
48 JSHandle<JSNativePointer> np(thread, arrayBufferData.GetTaggedObject());
49 NativeAreaAllocator *allocator = thread->GetEcmaVM()->GetNativeAreaAllocator();
50 allocator->IncreaseNativeMemoryUsage(MallocUsableSize(np->GetExternalPointer()));
51 np->SetData(allocator);
52 }
53 SetArrayBufferByteLength(arrayBufferByteLength);
54 SetArrayBufferData(thread, arrayBufferData);
55 }
56
Detach(JSThread * thread,bool transferWithNativeAreaAllocator,bool isSerialize)57 void JSArrayBuffer::Detach(JSThread *thread, bool transferWithNativeAreaAllocator, bool isSerialize)
58 {
59 JSTaggedValue arrayBufferData = GetArrayBufferData();
60 // already detached.
61 if (arrayBufferData.IsNull()) {
62 return;
63 }
64
65 // only in transition, should the JSArrayBuffer with NativeAreaAllocator decrease mem usage
66 if (transferWithNativeAreaAllocator) {
67 LOG_FULL(DEBUG) << "detaching for transfer";
68 JSHandle<JSNativePointer> np(thread, arrayBufferData.GetTaggedObject());
69 NativeAreaAllocator *allocator = thread->GetEcmaVM()->GetNativeAreaAllocator();
70 allocator->DecreaseNativeMemoryUsage(MallocUsableSize(np->GetExternalPointer()));
71 np->SetData(nullptr);
72 }
73 if (isSerialize && arrayBufferData.IsJSNativePointer()) {
74 reinterpret_cast<JSNativePointer *>(arrayBufferData.GetTaggedObject())->SetDeleter(nullptr);
75 }
76 SetArrayBufferData(thread, JSTaggedValue::Null());
77 SetArrayBufferByteLength(0);
78 }
79 } // namespace panda::ecmascript