1 /*
2 * Copyright (c) 2024 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/shared_objects/js_sendable_arraybuffer.h"
17 #include "ecmascript/mem/barriers-inl.h"
18 #include "ecmascript/platform/os.h"
19 #include "ecmascript/js_tagged_value-inl.h"
20
21 namespace panda::ecmascript {
CopyDataBlockBytes(JSTaggedValue toBlock,JSTaggedValue fromBlock,int32_t fromIndex,int32_t count)22 void JSSendableArrayBuffer::CopyDataBlockBytes(
23 JSTaggedValue toBlock, JSTaggedValue fromBlock, int32_t fromIndex, int32_t count)
24 {
25 void *fromBuf = JSNativePointer::Cast(fromBlock.GetTaggedObject())->GetExternalPointer();
26 void *toBuf = JSNativePointer::Cast(toBlock.GetTaggedObject())->GetExternalPointer();
27 CopyDataPointBytes(toBuf, fromBuf, fromIndex, count);
28 }
29
CopyDataPointBytes(void * toBuf,void * fromBuf,int32_t fromIndex,int32_t count)30 void JSSendableArrayBuffer::CopyDataPointBytes(void *toBuf, void *fromBuf, int32_t fromIndex, int32_t count)
31 {
32 auto *from = static_cast<uint8_t *>(fromBuf);
33 auto *to = static_cast<uint8_t *>(toBuf);
34 ASSERT(from != nullptr && to != nullptr);
35 // LCOV_EXCL_START
36 if (memcpy_s(to, count, from + fromIndex, count) != EOK) { // NOLINT
37 LOG_FULL(FATAL) << "memcpy_s failed";
38 UNREACHABLE();
39 } // LCOV_EXCL_STOP
40 }
41
Attach(JSThread * thread,uint32_t arrayBufferByteLength,JSTaggedValue arrayBufferData,bool transferWithNativeAreaAllocator)42 void JSSendableArrayBuffer::Attach(JSThread *thread, uint32_t arrayBufferByteLength,
43 JSTaggedValue arrayBufferData, bool transferWithNativeAreaAllocator)
44 {
45 ASSERT(arrayBufferData.IsJSNativePointer());
46 // only in transition, should the JSSendableArrayBuffer with NativeAreaAllocator increase mem usage
47 if (transferWithNativeAreaAllocator) {
48 LOG_FULL(DEBUG) << "attaching for transfer";
49 JSHandle<JSNativePointer> np(thread, arrayBufferData.GetTaggedObject());
50 NativeAreaAllocator *allocator = SharedHeap::GetInstance()->GetNativeAreaAllocator();
51 if (allocator == nullptr) {
52 LOG_ECMA(FATAL) << "JSSendableArrayBuffer::Attach:allocator is nullptr";
53 }
54 allocator->IncreaseNativeMemoryUsage(MallocUsableSize(np->GetExternalPointer()));
55 np->SetData(allocator);
56 }
57 SetArrayBufferByteLength(arrayBufferByteLength);
58 SetArrayBufferData(thread, arrayBufferData);
59 }
60
Detach(JSThread * thread,bool transferWithNativeAreaAllocator)61 void JSSendableArrayBuffer::Detach(JSThread *thread, bool transferWithNativeAreaAllocator)
62 {
63 JSTaggedValue arrayBufferData = GetArrayBufferData();
64 // already detached.
65 if (arrayBufferData.IsNull()) {
66 return;
67 }
68
69 // only in transition, should the JSSendableArrayBuffer with NativeAreaAllocator decrease mem usage
70 if (transferWithNativeAreaAllocator) {
71 LOG_FULL(DEBUG) << "detaching for transfer";
72 JSHandle<JSNativePointer> np(thread, arrayBufferData.GetTaggedObject());
73 NativeAreaAllocator *allocator = SharedHeap::GetInstance()->GetNativeAreaAllocator();
74 allocator->DecreaseNativeMemoryUsage(MallocUsableSize(np->GetExternalPointer()));
75 np->SetData(nullptr);
76 }
77 SetArrayBufferData(thread, JSTaggedValue::Null());
78 SetArrayBufferByteLength(0);
79 }
80 } // namespace panda::ecmascript