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 "pool_map.h"
17
18 namespace panda {
19
AddPoolToMap(const void * pool_addr,size_t pool_size,SpaceType space_type,AllocatorType allocator_type,const void * allocator_addr)20 void PoolMap::AddPoolToMap(const void *pool_addr, size_t pool_size, SpaceType space_type, AllocatorType allocator_type,
21 const void *allocator_addr)
22 {
23 ASSERT(ToUintPtr(pool_addr) % POOL_MAP_GRANULARITY == 0);
24 ASSERT(pool_size % POOL_MAP_GRANULARITY == 0);
25 ASSERT(allocator_addr != nullptr);
26 size_t first_map_num = AddrToMapNum(pool_addr);
27 size_t last_map_num = AddrToMapNum(ToVoidPtr(ToUintPtr(pool_addr) + pool_size - 1U));
28 pool_map_[first_map_num].Initialize(FIRST_BYTE_IN_SEGMENT_VALUE, space_type, allocator_type, allocator_addr);
29 for (size_t i = first_map_num + 1U; i <= last_map_num; i++) {
30 pool_map_[i].Initialize(!FIRST_BYTE_IN_SEGMENT_VALUE, space_type, allocator_type, allocator_addr);
31 }
32 }
33
RemovePoolFromMap(void * pool_addr,size_t pool_size)34 void PoolMap::RemovePoolFromMap(void *pool_addr, size_t pool_size)
35 {
36 ASSERT(ToUintPtr(pool_addr) % POOL_MAP_GRANULARITY == 0);
37 ASSERT(pool_size % POOL_MAP_GRANULARITY == 0);
38 size_t first_map_num = AddrToMapNum(pool_addr);
39 size_t last_map_num = AddrToMapNum(ToVoidPtr(ToUintPtr(pool_addr) + pool_size - 1U));
40 for (size_t i = first_map_num; i <= last_map_num; i++) {
41 pool_map_[i].Destroy();
42 }
43 }
44
GetAllocatorInfo(const void * addr) const45 AllocatorInfo PoolMap::GetAllocatorInfo(const void *addr) const
46 {
47 size_t map_num = AddrToMapNum(addr);
48 AllocatorType allocator_type = pool_map_[map_num].GetAllocatorType();
49 const void *allocator_addr = pool_map_[map_num].GetAllocatorAddr();
50 // We can't get allocator info for not properly initialized pools
51 ASSERT(allocator_type != AllocatorType::UNDEFINED);
52 ASSERT(allocator_addr != nullptr);
53 return AllocatorInfo(allocator_type, allocator_addr);
54 }
55
GetSpaceType(const void * addr) const56 SpaceType PoolMap::GetSpaceType(const void *addr) const
57 {
58 if (ToUintPtr(addr) > (POOL_MAP_COVERAGE - 1U)) {
59 return SpaceType::SPACE_TYPE_UNDEFINED;
60 }
61 size_t map_num = AddrToMapNum(addr);
62 SpaceType space_type = pool_map_[map_num].GetSpaceType();
63 // We can't get space type for not properly initialized pools
64 ASSERT(space_type != SpaceType::SPACE_TYPE_UNDEFINED);
65 return space_type;
66 }
67
GetFirstByteOfPoolForAddr(const void * addr)68 void *PoolMap::GetFirstByteOfPoolForAddr(const void *addr)
69 {
70 return GetFirstByteInSegment(addr);
71 }
72
GetFirstByteInSegment(const void * addr)73 void *PoolMap::GetFirstByteInSegment(const void *addr)
74 {
75 size_t current_map_num = AddrToMapNum(addr);
76 while (!pool_map_[current_map_num].IsFirstByteInSegment()) {
77 ASSERT(current_map_num != 0);
78 current_map_num--;
79 }
80 return MapNumToAddr(current_map_num);
81 }
82
83 } // namespace panda
84