1 /*
2 * Copyright (c) 2022 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_mm/shared_mm.h"
17
18 #if ECMASCRIPT_ENABLE_ZAP_MEM
19 #include "securec.h"
20 #endif
21
22 namespace panda::ecmascript {
23 static constexpr size_t MALLOC_SIZE_LIMIT = 2147483648; // Max internal memory used by the VM declared in options
24
~JSSharedMemoryManager()25 JSSharedMemoryManager::~JSSharedMemoryManager()
26 {
27 LockHolder lock(jsSharedMemoryLock_);
28 auto iter = loadedJSSharedMemory_.begin();
29 while (iter != loadedJSSharedMemory_.end()) {
30 const void *pointer = ToVoidPtr(iter->first);
31 FreeBuffer(const_cast<void *>(pointer));
32 iter = loadedJSSharedMemory_.erase(iter);
33 }
34 }
35
CreateOrLoad(void ** pointer,size_t size)36 bool JSSharedMemoryManager::CreateOrLoad(void **pointer, size_t size)
37 {
38 if (*pointer != nullptr) {
39 if (loadedJSSharedMemory_.find((uint64_t)*pointer) != loadedJSSharedMemory_.end()) {
40 IncreaseRefSharedMemory(*pointer);
41 }
42 return false;
43 }
44 *pointer = AllocateBuffer(size);
45 InsertSharedMemory(*pointer);
46 return true;
47 }
48
InsertSharedMemory(const void * pointer)49 void JSSharedMemoryManager::InsertSharedMemory(const void *pointer)
50 {
51 LockHolder lock(jsSharedMemoryLock_);
52 if (loadedJSSharedMemory_.find((uint64_t)pointer) == loadedJSSharedMemory_.end()) {
53 loadedJSSharedMemory_[(uint64_t)pointer] = 1;
54 }
55 }
56
IncreaseRefSharedMemory(const void * pointer)57 void JSSharedMemoryManager::IncreaseRefSharedMemory(const void *pointer)
58 {
59 LockHolder lock(jsSharedMemoryLock_);
60 if (loadedJSSharedMemory_.find((uint64_t)pointer) != loadedJSSharedMemory_.end()) {
61 loadedJSSharedMemory_[(uint64_t)pointer]++;
62 }
63 }
64
DecreaseRefSharedMemory(const void * pointer)65 void JSSharedMemoryManager::DecreaseRefSharedMemory(const void *pointer)
66 {
67 LockHolder lock(jsSharedMemoryLock_);
68 auto iter = loadedJSSharedMemory_.find((uint64_t)pointer);
69 if (iter != loadedJSSharedMemory_.end()) {
70 if (iter->second > 1) {
71 iter->second--;
72 return;
73 }
74 loadedJSSharedMemory_.erase(iter);
75 FreeBuffer(const_cast<void *>(pointer));
76 }
77 }
78
AllocateBuffer(size_t size)79 void *JSSharedMemoryManager::AllocateBuffer(size_t size)
80 {
81 if (size == 0) {
82 LOG_ECMA_MEM(FATAL) << "size must have a size bigger than 0";
83 UNREACHABLE();
84 }
85 if (size >= MALLOC_SIZE_LIMIT) {
86 LOG_ECMA_MEM(FATAL) << "size must be less than the maximum";
87 UNREACHABLE();
88 }
89 // NOLINTNEXTLINE(cppcoreguidelines-no-malloc)
90 void *ptr = malloc(size);
91 if (ptr == nullptr) {
92 LOG_ECMA_MEM(FATAL) << "malloc failed";
93 UNREACHABLE();
94 }
95 #if ECMASCRIPT_ENABLE_ZAP_MEM
96 if (memset_s(ptr, size, INVALID_VALUE, size) != EOK) {
97 LOG_ECMA_MEM(FATAL) << "memset failed";
98 UNREACHABLE();
99 }
100 #endif
101 return ptr;
102 }
103
FreeBuffer(void * mem)104 void JSSharedMemoryManager::FreeBuffer(void *mem)
105 {
106 if (mem == nullptr) {
107 return;
108 }
109 // NOLINTNEXTLINE(cppcoreguidelines-no-malloc)
110 free(mem);
111 }
112
RemoveSharedMemory(void * env,void * pointer,void * data)113 void JSSharedMemoryManager::RemoveSharedMemory([[maybe_unused]] void *env, void *pointer, void *data)
114 {
115 if (pointer == nullptr || data == nullptr) {
116 return;
117 }
118 // dec ref in menorymanager
119 JSSharedMemoryManager *jsSharedMemoryManager = static_cast<JSSharedMemoryManager *>(data);
120 jsSharedMemoryManager->DecreaseRefSharedMemory(pointer);
121 }
122 } // namespace panda::ecmascript
123