1/**
2 * Copyright (c) 2021-2022 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 "pool_map.h"
17
18#include "mem/mem.h"
19#include "mem/space.h"
20
21namespace panda {
22
23void PoolMap::AddPoolToMap(const void *pool_addr, size_t pool_size, SpaceType space_type, AllocatorType allocator_type,
24                           const void *allocator_addr)
25{
26    ASSERT(ToUintPtr(pool_addr) % POOL_MAP_GRANULARITY == 0);
27    ASSERT(pool_size % POOL_MAP_GRANULARITY == 0);
28    ASSERT(allocator_addr != nullptr);
29    size_t first_map_num = AddrToMapNum(pool_addr);
30    size_t last_map_num = AddrToMapNum(ToVoidPtr(ToUintPtr(pool_addr) + pool_size - 1U));
31    pool_map_[first_map_num].Initialize(FIRST_BYTE_IN_SEGMENT_VALUE, space_type, allocator_type, allocator_addr);
32    for (size_t i = first_map_num + 1U; i <= last_map_num; i++) {
33        pool_map_[i].Initialize(!FIRST_BYTE_IN_SEGMENT_VALUE, space_type, allocator_type, allocator_addr);
34    }
35}
36
37void PoolMap::RemovePoolFromMap(const void *pool_addr, size_t pool_size)
38{
39    ASSERT(ToUintPtr(pool_addr) % POOL_MAP_GRANULARITY == 0);
40    ASSERT(pool_size % POOL_MAP_GRANULARITY == 0);
41    size_t first_map_num = AddrToMapNum(pool_addr);
42    size_t last_map_num = AddrToMapNum(ToVoidPtr(ToUintPtr(pool_addr) + pool_size - 1U));
43    for (size_t i = first_map_num; i <= last_map_num; i++) {
44        pool_map_[i].Destroy();
45    }
46}
47
48AllocatorInfo PoolMap::GetAllocatorInfo(const void *addr) const
49{
50    size_t map_num = AddrToMapNum(addr);
51    AllocatorType allocator_type = pool_map_[map_num].GetAllocatorType();
52    const void *allocator_addr = pool_map_[map_num].GetAllocatorAddr();
53    // We can't get allocator info for not properly initialized pools
54    ASSERT(allocator_type != AllocatorType::UNDEFINED);
55    ASSERT(allocator_addr != nullptr);
56    return AllocatorInfo(allocator_type, allocator_addr);
57}
58
59SpaceType PoolMap::GetSpaceType(const void *addr) const
60{
61    if (ToUintPtr(addr) > (POOL_MAP_COVERAGE - 1U)) {
62        return SpaceType::SPACE_TYPE_UNDEFINED;
63    }
64    size_t map_num = AddrToMapNum(addr);
65    SpaceType space_type = pool_map_[map_num].GetSpaceType();
66    // We can't get space type for not properly initialized pools
67    ASSERT(space_type != SpaceType::SPACE_TYPE_UNDEFINED);
68    return space_type;
69}
70
71void *PoolMap::GetFirstByteOfPoolForAddr(const void *addr) const
72{
73    return GetFirstByteInSegment(addr);
74}
75
76void *PoolMap::GetFirstByteInSegment(const void *addr) const
77{
78    size_t current_map_num = AddrToMapNum(addr);
79    while (!pool_map_[current_map_num].IsFirstByteInSegment()) {
80        ASSERT(current_map_num != 0);
81        current_map_num--;
82    }
83    return MapNumToAddr(current_map_num);
84}
85
86bool PoolMap::IsEmpty() const
87{
88    for (auto i : pool_map_) {
89        if (!i.IsEmpty()) {
90            return false;
91        }
92    }
93    return true;
94}
95
96}  // namespace panda
97