1 /*
2 * Copyright (C) 2011 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_DEX_FILE_INL_H_
18 #define ART_RUNTIME_DEX_FILE_INL_H_
19
20 #include "base/bit_utils.h"
21 #include "base/logging.h"
22 #include "base/stringpiece.h"
23 #include "dex_file.h"
24 #include "leb128.h"
25
26 namespace art {
27
GetStringLength(const StringId & string_id)28 inline int32_t DexFile::GetStringLength(const StringId& string_id) const {
29 const uint8_t* ptr = begin_ + string_id.string_data_off_;
30 return DecodeUnsignedLeb128(&ptr);
31 }
32
GetStringDataAndUtf16Length(const StringId & string_id,uint32_t * utf16_length)33 inline const char* DexFile::GetStringDataAndUtf16Length(const StringId& string_id,
34 uint32_t* utf16_length) const {
35 DCHECK(utf16_length != nullptr) << GetLocation();
36 const uint8_t* ptr = begin_ + string_id.string_data_off_;
37 *utf16_length = DecodeUnsignedLeb128(&ptr);
38 return reinterpret_cast<const char*>(ptr);
39 }
40
GetStringData(const StringId & string_id)41 inline const char* DexFile::GetStringData(const StringId& string_id) const {
42 uint32_t ignored;
43 return GetStringDataAndUtf16Length(string_id, &ignored);
44 }
45
StringDataAndUtf16LengthByIdx(dex::StringIndex idx,uint32_t * utf16_length)46 inline const char* DexFile::StringDataAndUtf16LengthByIdx(dex::StringIndex idx,
47 uint32_t* utf16_length) const {
48 if (!idx.IsValid()) {
49 *utf16_length = 0;
50 return nullptr;
51 }
52 const StringId& string_id = GetStringId(idx);
53 return GetStringDataAndUtf16Length(string_id, utf16_length);
54 }
55
StringDataByIdx(dex::StringIndex idx)56 inline const char* DexFile::StringDataByIdx(dex::StringIndex idx) const {
57 uint32_t unicode_length;
58 return StringDataAndUtf16LengthByIdx(idx, &unicode_length);
59 }
60
StringByTypeIdx(dex::TypeIndex idx,uint32_t * unicode_length)61 inline const char* DexFile::StringByTypeIdx(dex::TypeIndex idx, uint32_t* unicode_length) const {
62 if (!idx.IsValid()) {
63 return nullptr;
64 }
65 const TypeId& type_id = GetTypeId(idx);
66 return StringDataAndUtf16LengthByIdx(type_id.descriptor_idx_, unicode_length);
67 }
68
StringByTypeIdx(dex::TypeIndex idx)69 inline const char* DexFile::StringByTypeIdx(dex::TypeIndex idx) const {
70 if (!idx.IsValid()) {
71 return nullptr;
72 }
73 const TypeId& type_id = GetTypeId(idx);
74 return StringDataByIdx(type_id.descriptor_idx_);
75 }
76
GetTypeDescriptor(const TypeId & type_id)77 inline const char* DexFile::GetTypeDescriptor(const TypeId& type_id) const {
78 return StringDataByIdx(type_id.descriptor_idx_);
79 }
80
GetFieldTypeDescriptor(const FieldId & field_id)81 inline const char* DexFile::GetFieldTypeDescriptor(const FieldId& field_id) const {
82 const DexFile::TypeId& type_id = GetTypeId(field_id.type_idx_);
83 return GetTypeDescriptor(type_id);
84 }
85
GetFieldName(const FieldId & field_id)86 inline const char* DexFile::GetFieldName(const FieldId& field_id) const {
87 return StringDataByIdx(field_id.name_idx_);
88 }
89
GetMethodDeclaringClassDescriptor(const MethodId & method_id)90 inline const char* DexFile::GetMethodDeclaringClassDescriptor(const MethodId& method_id) const {
91 const DexFile::TypeId& type_id = GetTypeId(method_id.class_idx_);
92 return GetTypeDescriptor(type_id);
93 }
94
GetMethodSignature(const MethodId & method_id)95 inline const Signature DexFile::GetMethodSignature(const MethodId& method_id) const {
96 return Signature(this, GetProtoId(method_id.proto_idx_));
97 }
98
GetProtoSignature(const ProtoId & proto_id)99 inline const Signature DexFile::GetProtoSignature(const ProtoId& proto_id) const {
100 return Signature(this, proto_id);
101 }
102
GetMethodName(const MethodId & method_id)103 inline const char* DexFile::GetMethodName(const MethodId& method_id) const {
104 return StringDataByIdx(method_id.name_idx_);
105 }
106
GetMethodShorty(uint32_t idx)107 inline const char* DexFile::GetMethodShorty(uint32_t idx) const {
108 return StringDataByIdx(GetProtoId(GetMethodId(idx).proto_idx_).shorty_idx_);
109 }
110
GetMethodShorty(const MethodId & method_id)111 inline const char* DexFile::GetMethodShorty(const MethodId& method_id) const {
112 return StringDataByIdx(GetProtoId(method_id.proto_idx_).shorty_idx_);
113 }
114
GetMethodShorty(const MethodId & method_id,uint32_t * length)115 inline const char* DexFile::GetMethodShorty(const MethodId& method_id, uint32_t* length) const {
116 // Using the UTF16 length is safe here as shorties are guaranteed to be ASCII characters.
117 return StringDataAndUtf16LengthByIdx(GetProtoId(method_id.proto_idx_).shorty_idx_, length);
118 }
119
GetClassDescriptor(const ClassDef & class_def)120 inline const char* DexFile::GetClassDescriptor(const ClassDef& class_def) const {
121 return StringByTypeIdx(class_def.class_idx_);
122 }
123
GetReturnTypeDescriptor(const ProtoId & proto_id)124 inline const char* DexFile::GetReturnTypeDescriptor(const ProtoId& proto_id) const {
125 return StringByTypeIdx(proto_id.return_type_idx_);
126 }
127
GetShorty(uint32_t proto_idx)128 inline const char* DexFile::GetShorty(uint32_t proto_idx) const {
129 const ProtoId& proto_id = GetProtoId(proto_idx);
130 return StringDataByIdx(proto_id.shorty_idx_);
131 }
132
GetTryItems(const CodeItem & code_item,uint32_t offset)133 inline const DexFile::TryItem* DexFile::GetTryItems(const CodeItem& code_item, uint32_t offset) {
134 const uint16_t* insns_end_ = &code_item.insns_[code_item.insns_size_in_code_units_];
135 return reinterpret_cast<const TryItem*>
136 (RoundUp(reinterpret_cast<uintptr_t>(insns_end_), 4)) + offset;
137 }
138
DexFileStringEquals(const DexFile * df1,dex::StringIndex sidx1,const DexFile * df2,dex::StringIndex sidx2)139 static inline bool DexFileStringEquals(const DexFile* df1, dex::StringIndex sidx1,
140 const DexFile* df2, dex::StringIndex sidx2) {
141 uint32_t s1_len; // Note: utf16 length != mutf8 length.
142 const char* s1_data = df1->StringDataAndUtf16LengthByIdx(sidx1, &s1_len);
143 uint32_t s2_len;
144 const char* s2_data = df2->StringDataAndUtf16LengthByIdx(sidx2, &s2_len);
145 return (s1_len == s2_len) && (strcmp(s1_data, s2_data) == 0);
146 }
147
148 inline bool Signature::operator==(const Signature& rhs) const {
149 if (dex_file_ == nullptr) {
150 return rhs.dex_file_ == nullptr;
151 }
152 if (rhs.dex_file_ == nullptr) {
153 return false;
154 }
155 if (dex_file_ == rhs.dex_file_) {
156 return proto_id_ == rhs.proto_id_;
157 }
158 uint32_t lhs_shorty_len; // For a shorty utf16 length == mutf8 length.
159 const char* lhs_shorty_data = dex_file_->StringDataAndUtf16LengthByIdx(proto_id_->shorty_idx_,
160 &lhs_shorty_len);
161 StringPiece lhs_shorty(lhs_shorty_data, lhs_shorty_len);
162 {
163 uint32_t rhs_shorty_len;
164 const char* rhs_shorty_data =
165 rhs.dex_file_->StringDataAndUtf16LengthByIdx(rhs.proto_id_->shorty_idx_,
166 &rhs_shorty_len);
167 StringPiece rhs_shorty(rhs_shorty_data, rhs_shorty_len);
168 if (lhs_shorty != rhs_shorty) {
169 return false; // Shorty mismatch.
170 }
171 }
172 if (lhs_shorty[0] == 'L') {
173 const DexFile::TypeId& return_type_id = dex_file_->GetTypeId(proto_id_->return_type_idx_);
174 const DexFile::TypeId& rhs_return_type_id =
175 rhs.dex_file_->GetTypeId(rhs.proto_id_->return_type_idx_);
176 if (!DexFileStringEquals(dex_file_, return_type_id.descriptor_idx_,
177 rhs.dex_file_, rhs_return_type_id.descriptor_idx_)) {
178 return false; // Return type mismatch.
179 }
180 }
181 if (lhs_shorty.find('L', 1) != StringPiece::npos) {
182 const DexFile::TypeList* params = dex_file_->GetProtoParameters(*proto_id_);
183 const DexFile::TypeList* rhs_params = rhs.dex_file_->GetProtoParameters(*rhs.proto_id_);
184 // We found a reference parameter in the matching shorty, so both lists must be non-empty.
185 DCHECK(params != nullptr);
186 DCHECK(rhs_params != nullptr);
187 uint32_t params_size = params->Size();
188 DCHECK_EQ(params_size, rhs_params->Size()); // Parameter list size must match.
189 for (uint32_t i = 0; i < params_size; ++i) {
190 const DexFile::TypeId& param_id = dex_file_->GetTypeId(params->GetTypeItem(i).type_idx_);
191 const DexFile::TypeId& rhs_param_id =
192 rhs.dex_file_->GetTypeId(rhs_params->GetTypeItem(i).type_idx_);
193 if (!DexFileStringEquals(dex_file_, param_id.descriptor_idx_,
194 rhs.dex_file_, rhs_param_id.descriptor_idx_)) {
195 return false; // Parameter type mismatch.
196 }
197 }
198 }
199 return true;
200 }
201
202
203 } // namespace art
204
205 #endif // ART_RUNTIME_DEX_FILE_INL_H_
206