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