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 "base/bit_utils.h"
23 #include "base/logging.h"
24 #include "gc_root.h"
25 #include "globals.h"
26 #include "mirror/dex_cache.h"
27 #include "primitive.h"
28
29 namespace art {
30
DexCacheArraysLayout(PointerSize pointer_size,const DexFile::Header & header,uint32_t num_call_sites)31 inline DexCacheArraysLayout::DexCacheArraysLayout(PointerSize pointer_size,
32 const DexFile::Header& header,
33 uint32_t num_call_sites)
34 : pointer_size_(pointer_size),
35 /* types_offset_ is always 0u, so it's constexpr */
36 methods_offset_(
37 RoundUp(types_offset_ + TypesSize(header.type_ids_size_), MethodsAlignment())),
38 strings_offset_(
39 RoundUp(methods_offset_ + MethodsSize(header.method_ids_size_), StringsAlignment())),
40 fields_offset_(
41 RoundUp(strings_offset_ + StringsSize(header.string_ids_size_), FieldsAlignment())),
42 method_types_offset_(
43 RoundUp(fields_offset_ + FieldsSize(header.field_ids_size_), MethodTypesAlignment())),
44 call_sites_offset_(
45 RoundUp(method_types_offset_ + MethodTypesSize(header.proto_ids_size_),
46 MethodTypesAlignment())),
47 size_(RoundUp(call_sites_offset_ + CallSitesSize(num_call_sites), Alignment())) {
48 }
49
DexCacheArraysLayout(PointerSize pointer_size,const DexFile * dex_file)50 inline DexCacheArraysLayout::DexCacheArraysLayout(PointerSize pointer_size, const DexFile* dex_file)
51 : DexCacheArraysLayout(pointer_size, dex_file->GetHeader(), dex_file->NumCallSiteIds()) {
52 }
53
Alignment()54 inline size_t DexCacheArraysLayout::Alignment() const {
55 return Alignment(pointer_size_);
56 }
57
Alignment(PointerSize pointer_size)58 inline constexpr size_t DexCacheArraysLayout::Alignment(PointerSize pointer_size) {
59 // mirror::Type/String/MethodTypeDexCacheType alignment is 8,
60 // i.e. higher than or equal to the pointer alignment.
61 static_assert(alignof(mirror::TypeDexCacheType) == 8,
62 "Expecting alignof(ClassDexCacheType) == 8");
63 static_assert(alignof(mirror::StringDexCacheType) == 8,
64 "Expecting alignof(StringDexCacheType) == 8");
65 static_assert(alignof(mirror::MethodTypeDexCacheType) == 8,
66 "Expecting alignof(MethodTypeDexCacheType) == 8");
67 // This is the same as alignof({Field,Method}DexCacheType) for the given pointer size.
68 return 2u * static_cast<size_t>(pointer_size);
69 }
70
71 template <typename T>
GcRootAsPointerSize()72 constexpr PointerSize GcRootAsPointerSize() {
73 static_assert(sizeof(GcRoot<T>) == 4U, "Unexpected GcRoot size");
74 return PointerSize::k32;
75 }
76
TypeOffset(dex::TypeIndex type_idx)77 inline size_t DexCacheArraysLayout::TypeOffset(dex::TypeIndex type_idx) const {
78 return types_offset_ + ElementOffset(PointerSize::k64,
79 type_idx.index_ % mirror::DexCache::kDexCacheTypeCacheSize);
80 }
81
TypesSize(size_t num_elements)82 inline size_t DexCacheArraysLayout::TypesSize(size_t num_elements) const {
83 size_t cache_size = mirror::DexCache::kDexCacheTypeCacheSize;
84 if (num_elements < cache_size) {
85 cache_size = num_elements;
86 }
87 return PairArraySize(GcRootAsPointerSize<mirror::Class>(), cache_size);
88 }
89
TypesAlignment()90 inline size_t DexCacheArraysLayout::TypesAlignment() const {
91 return alignof(GcRoot<mirror::Class>);
92 }
93
MethodOffset(uint32_t method_idx)94 inline size_t DexCacheArraysLayout::MethodOffset(uint32_t method_idx) const {
95 return methods_offset_ + ElementOffset(pointer_size_, method_idx);
96 }
97
MethodsSize(size_t num_elements)98 inline size_t DexCacheArraysLayout::MethodsSize(size_t num_elements) const {
99 size_t cache_size = mirror::DexCache::kDexCacheMethodCacheSize;
100 if (num_elements < cache_size) {
101 cache_size = num_elements;
102 }
103 return PairArraySize(pointer_size_, cache_size);
104 }
105
MethodsAlignment()106 inline size_t DexCacheArraysLayout::MethodsAlignment() const {
107 return 2u * static_cast<size_t>(pointer_size_);
108 }
109
StringOffset(uint32_t string_idx)110 inline size_t DexCacheArraysLayout::StringOffset(uint32_t string_idx) const {
111 uint32_t string_hash = string_idx % mirror::DexCache::kDexCacheStringCacheSize;
112 return strings_offset_ + ElementOffset(PointerSize::k64, string_hash);
113 }
114
StringsSize(size_t num_elements)115 inline size_t DexCacheArraysLayout::StringsSize(size_t num_elements) const {
116 size_t cache_size = mirror::DexCache::kDexCacheStringCacheSize;
117 if (num_elements < cache_size) {
118 cache_size = num_elements;
119 }
120 return PairArraySize(GcRootAsPointerSize<mirror::String>(), cache_size);
121 }
122
StringsAlignment()123 inline size_t DexCacheArraysLayout::StringsAlignment() const {
124 static_assert(alignof(mirror::StringDexCacheType) == 8,
125 "Expecting alignof(StringDexCacheType) == 8");
126 return alignof(mirror::StringDexCacheType);
127 }
128
FieldOffset(uint32_t field_idx)129 inline size_t DexCacheArraysLayout::FieldOffset(uint32_t field_idx) const {
130 uint32_t field_hash = field_idx % mirror::DexCache::kDexCacheFieldCacheSize;
131 return fields_offset_ + 2u * static_cast<size_t>(pointer_size_) * field_hash;
132 }
133
FieldsSize(size_t num_elements)134 inline size_t DexCacheArraysLayout::FieldsSize(size_t num_elements) const {
135 size_t cache_size = mirror::DexCache::kDexCacheFieldCacheSize;
136 if (num_elements < cache_size) {
137 cache_size = num_elements;
138 }
139 return PairArraySize(pointer_size_, cache_size);
140 }
141
FieldsAlignment()142 inline size_t DexCacheArraysLayout::FieldsAlignment() const {
143 return 2u * static_cast<size_t>(pointer_size_);
144 }
145
MethodTypesSize(size_t num_elements)146 inline size_t DexCacheArraysLayout::MethodTypesSize(size_t num_elements) const {
147 size_t cache_size = mirror::DexCache::kDexCacheMethodTypeCacheSize;
148 if (num_elements < cache_size) {
149 cache_size = num_elements;
150 }
151
152 return ArraySize(PointerSize::k64, cache_size);
153 }
154
MethodTypesAlignment()155 inline size_t DexCacheArraysLayout::MethodTypesAlignment() const {
156 static_assert(alignof(mirror::MethodTypeDexCacheType) == 8,
157 "Expecting alignof(MethodTypeDexCacheType) == 8");
158 return alignof(mirror::MethodTypeDexCacheType);
159 }
160
CallSitesSize(size_t num_elements)161 inline size_t DexCacheArraysLayout::CallSitesSize(size_t num_elements) const {
162 return ArraySize(GcRootAsPointerSize<mirror::CallSite>(), num_elements);
163 }
164
CallSitesAlignment()165 inline size_t DexCacheArraysLayout::CallSitesAlignment() const {
166 return alignof(GcRoot<mirror::CallSite>);
167 }
168
ElementOffset(PointerSize element_size,uint32_t idx)169 inline size_t DexCacheArraysLayout::ElementOffset(PointerSize element_size, uint32_t idx) {
170 return static_cast<size_t>(element_size) * idx;
171 }
172
ArraySize(PointerSize element_size,uint32_t num_elements)173 inline size_t DexCacheArraysLayout::ArraySize(PointerSize element_size, uint32_t num_elements) {
174 return static_cast<size_t>(element_size) * num_elements;
175 }
176
PairArraySize(PointerSize element_size,uint32_t num_elements)177 inline size_t DexCacheArraysLayout::PairArraySize(PointerSize element_size, uint32_t num_elements) {
178 return 2u * static_cast<size_t>(element_size) * num_elements;
179 }
180
181 } // namespace art
182
183 #endif // ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_INL_H_
184