1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_INL_H_
18 #define ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_INL_H_
19
20 #include "dex_cache_arrays_layout.h"
21
22 #include <android-base/logging.h>
23
24 #include "base/bit_utils.h"
25 #include "dex/primitive.h"
26 #include "gc_root.h"
27 #include "mirror/dex_cache.h"
28 #include "runtime_globals.h"
29
30 namespace art {
31
DexCacheArraysLayout(PointerSize pointer_size,const DexFile::Header & header,uint32_t num_call_sites)32 inline DexCacheArraysLayout::DexCacheArraysLayout(PointerSize pointer_size,
33 const DexFile::Header& header,
34 uint32_t num_call_sites)
35 : pointer_size_(pointer_size),
36 /* types_offset_ is always 0u, so it's constexpr */
37 methods_offset_(
38 RoundUp(types_offset_ + TypesSize(header.type_ids_size_), MethodsAlignment())),
39 strings_offset_(
40 RoundUp(methods_offset_ + MethodsSize(header.method_ids_size_), StringsAlignment())),
41 fields_offset_(
42 RoundUp(strings_offset_ + StringsSize(header.string_ids_size_), FieldsAlignment())),
43 method_types_offset_(
44 RoundUp(fields_offset_ + FieldsSize(header.field_ids_size_), MethodTypesAlignment())),
45 call_sites_offset_(
46 RoundUp(method_types_offset_ + MethodTypesSize(header.proto_ids_size_),
47 MethodTypesAlignment())),
48 size_(RoundUp(call_sites_offset_ + CallSitesSize(num_call_sites), Alignment())) {
49 }
50
DexCacheArraysLayout(PointerSize pointer_size,const DexFile * dex_file)51 inline DexCacheArraysLayout::DexCacheArraysLayout(PointerSize pointer_size, const DexFile* dex_file)
52 : DexCacheArraysLayout(pointer_size, dex_file->GetHeader(), dex_file->NumCallSiteIds()) {
53 }
54
Alignment()55 inline size_t DexCacheArraysLayout::Alignment() const {
56 return Alignment(pointer_size_);
57 }
58
Alignment(PointerSize pointer_size)59 inline constexpr size_t DexCacheArraysLayout::Alignment(PointerSize pointer_size) {
60 // mirror::Type/String/MethodTypeDexCacheType alignment is 8,
61 // i.e. higher than or equal to the pointer alignment.
62 static_assert(alignof(mirror::TypeDexCacheType) == 8,
63 "Expecting alignof(ClassDexCacheType) == 8");
64 static_assert(alignof(mirror::StringDexCacheType) == 8,
65 "Expecting alignof(StringDexCacheType) == 8");
66 static_assert(alignof(mirror::MethodTypeDexCacheType) == 8,
67 "Expecting alignof(MethodTypeDexCacheType) == 8");
68 // This is the same as alignof({Field,Method}DexCacheType) for the given pointer size.
69 return 2u * static_cast<size_t>(pointer_size);
70 }
71
72 template <typename T>
GcRootAsPointerSize()73 constexpr PointerSize GcRootAsPointerSize() {
74 static_assert(sizeof(GcRoot<T>) == 4U, "Unexpected GcRoot size");
75 return PointerSize::k32;
76 }
77
TypeOffset(dex::TypeIndex type_idx)78 inline size_t DexCacheArraysLayout::TypeOffset(dex::TypeIndex type_idx) const {
79 return types_offset_ + ElementOffset(PointerSize::k64,
80 type_idx.index_ % mirror::DexCache::kDexCacheTypeCacheSize);
81 }
82
TypesSize(size_t num_elements)83 inline size_t DexCacheArraysLayout::TypesSize(size_t num_elements) const {
84 size_t cache_size = mirror::DexCache::kDexCacheTypeCacheSize;
85 if (num_elements < cache_size) {
86 cache_size = num_elements;
87 }
88 return PairArraySize(GcRootAsPointerSize<mirror::Class>(), cache_size);
89 }
90
TypesAlignment()91 inline size_t DexCacheArraysLayout::TypesAlignment() const {
92 return alignof(GcRoot<mirror::Class>);
93 }
94
MethodOffset(uint32_t method_idx)95 inline size_t DexCacheArraysLayout::MethodOffset(uint32_t method_idx) const {
96 return methods_offset_ + ElementOffset(pointer_size_, method_idx);
97 }
98
MethodsSize(size_t num_elements)99 inline size_t DexCacheArraysLayout::MethodsSize(size_t num_elements) const {
100 size_t cache_size = mirror::DexCache::kDexCacheMethodCacheSize;
101 if (num_elements < cache_size) {
102 cache_size = num_elements;
103 }
104 return PairArraySize(pointer_size_, cache_size);
105 }
106
MethodsAlignment()107 inline size_t DexCacheArraysLayout::MethodsAlignment() const {
108 return 2u * static_cast<size_t>(pointer_size_);
109 }
110
StringOffset(uint32_t string_idx)111 inline size_t DexCacheArraysLayout::StringOffset(uint32_t string_idx) const {
112 uint32_t string_hash = string_idx % mirror::DexCache::kDexCacheStringCacheSize;
113 return strings_offset_ + ElementOffset(PointerSize::k64, string_hash);
114 }
115
StringsSize(size_t num_elements)116 inline size_t DexCacheArraysLayout::StringsSize(size_t num_elements) const {
117 size_t cache_size = mirror::DexCache::kDexCacheStringCacheSize;
118 if (num_elements < cache_size) {
119 cache_size = num_elements;
120 }
121 return PairArraySize(GcRootAsPointerSize<mirror::String>(), cache_size);
122 }
123
StringsAlignment()124 inline size_t DexCacheArraysLayout::StringsAlignment() const {
125 static_assert(alignof(mirror::StringDexCacheType) == 8,
126 "Expecting alignof(StringDexCacheType) == 8");
127 return alignof(mirror::StringDexCacheType);
128 }
129
FieldOffset(uint32_t field_idx)130 inline size_t DexCacheArraysLayout::FieldOffset(uint32_t field_idx) const {
131 uint32_t field_hash = field_idx % mirror::DexCache::kDexCacheFieldCacheSize;
132 return fields_offset_ + 2u * static_cast<size_t>(pointer_size_) * field_hash;
133 }
134
FieldsSize(size_t num_elements)135 inline size_t DexCacheArraysLayout::FieldsSize(size_t num_elements) const {
136 size_t cache_size = mirror::DexCache::kDexCacheFieldCacheSize;
137 if (num_elements < cache_size) {
138 cache_size = num_elements;
139 }
140 return PairArraySize(pointer_size_, cache_size);
141 }
142
FieldsAlignment()143 inline size_t DexCacheArraysLayout::FieldsAlignment() const {
144 return 2u * static_cast<size_t>(pointer_size_);
145 }
146
MethodTypesSize(size_t num_elements)147 inline size_t DexCacheArraysLayout::MethodTypesSize(size_t num_elements) const {
148 size_t cache_size = mirror::DexCache::kDexCacheMethodTypeCacheSize;
149 if (num_elements < cache_size) {
150 cache_size = num_elements;
151 }
152
153 return ArraySize(PointerSize::k64, cache_size);
154 }
155
MethodTypesAlignment()156 inline size_t DexCacheArraysLayout::MethodTypesAlignment() const {
157 static_assert(alignof(mirror::MethodTypeDexCacheType) == 8,
158 "Expecting alignof(MethodTypeDexCacheType) == 8");
159 return alignof(mirror::MethodTypeDexCacheType);
160 }
161
CallSitesSize(size_t num_elements)162 inline size_t DexCacheArraysLayout::CallSitesSize(size_t num_elements) const {
163 return ArraySize(GcRootAsPointerSize<mirror::CallSite>(), num_elements);
164 }
165
CallSitesAlignment()166 inline size_t DexCacheArraysLayout::CallSitesAlignment() const {
167 return alignof(GcRoot<mirror::CallSite>);
168 }
169
ElementOffset(PointerSize element_size,uint32_t idx)170 inline size_t DexCacheArraysLayout::ElementOffset(PointerSize element_size, uint32_t idx) {
171 return static_cast<size_t>(element_size) * idx;
172 }
173
ArraySize(PointerSize element_size,uint32_t num_elements)174 inline size_t DexCacheArraysLayout::ArraySize(PointerSize element_size, uint32_t num_elements) {
175 return static_cast<size_t>(element_size) * num_elements;
176 }
177
PairArraySize(PointerSize element_size,uint32_t num_elements)178 inline size_t DexCacheArraysLayout::PairArraySize(PointerSize element_size, uint32_t num_elements) {
179 return 2u * static_cast<size_t>(element_size) * num_elements;
180 }
181
182 } // namespace art
183
184 #endif // ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_INL_H_
185