1 /*
2  * Copyright (c) 2023 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 #ifndef ECMASCRIPT_COMPILER_AOT_FILE_EXECUTED_MEMORY_ALLOCATOR_H
16 #define ECMASCRIPT_COMPILER_AOT_FILE_EXECUTED_MEMORY_ALLOCATOR_H
17 
18 #include "ecmascript/mem/mem.h"
19 #include "ecmascript/platform/map.h"
20 
21 namespace panda::ecmascript {
22 class ExecutedMemoryAllocator {
23 public:
24     struct ExeMem {
25         void *addr_ {nullptr};
26         size_t size_ {0};
27     };
28 
AllocateBuf(uint32_t size, ExeMem &exeMem, int prot)29     static void AllocateBuf(uint32_t size, ExeMem &exeMem, int prot)
30     {
31         // For safety reason, Disallow prot have both write & exec capability except in JIT.
32         ASSERT(prot != PAGE_PROT_EXEC_READWRITE);
33         MemMap buf = MachineCodePageMap(AlignUp(size, PageSize()), prot);
34         exeMem.addr_ = buf.GetMem();
35         exeMem.size_ = buf.GetSize();
36     }
37 
DestroyBuf(ExeMem &exeMem)38     static void DestroyBuf(ExeMem &exeMem)
39     {
40         if (exeMem.addr_ != nullptr) {
41             MachineCodePageUnmap(MemMap(exeMem.addr_, exeMem.size_));
42             exeMem.addr_ = nullptr;
43             exeMem.size_ = 0;
44         }
45     }
46 };
47 }  // namespace panda::ecmascript
48 #endif  // ECMASCRIPT_COMPILER_AOT_FILE_EXECUTED_MEMORY_ALLOCATOR_H
49