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 #include "method_helper-inl.h"
18
19 #include "class_linker.h"
20 #include "dex_file-inl.h"
21 #include "handle_scope-inl.h"
22 #include "mirror/art_method-inl.h"
23 #include "mirror/dex_cache.h"
24 #include "runtime.h"
25
26 namespace art {
27
GetNameAsString(Thread * self)28 mirror::String* MethodHelper::GetNameAsString(Thread* self) {
29 const DexFile* dex_file = method_->GetDexFile();
30 mirror::ArtMethod* method = method_->GetInterfaceMethodIfProxy();
31 uint32_t dex_method_idx = method->GetDexMethodIndex();
32 const DexFile::MethodId& method_id = dex_file->GetMethodId(dex_method_idx);
33 StackHandleScope<1> hs(self);
34 Handle<mirror::DexCache> dex_cache(hs.NewHandle(method->GetDexCache()));
35 return Runtime::Current()->GetClassLinker()->ResolveString(*dex_file, method_id.name_idx_,
36 dex_cache);
37 }
38
HasSameSignatureWithDifferentClassLoaders(MethodHelper * other)39 bool MethodHelper::HasSameSignatureWithDifferentClassLoaders(MethodHelper* other) {
40 if (UNLIKELY(GetReturnType() != other->GetReturnType())) {
41 return false;
42 }
43 const DexFile::TypeList* types = method_->GetParameterTypeList();
44 const DexFile::TypeList* other_types = other->method_->GetParameterTypeList();
45 if (types == nullptr) {
46 return (other_types == nullptr) || (other_types->Size() == 0);
47 } else if (UNLIKELY(other_types == nullptr)) {
48 return types->Size() == 0;
49 }
50 uint32_t num_types = types->Size();
51 if (UNLIKELY(num_types != other_types->Size())) {
52 return false;
53 }
54 for (uint32_t i = 0; i < num_types; ++i) {
55 mirror::Class* param_type = GetClassFromTypeIdx(types->GetTypeItem(i).type_idx_);
56 mirror::Class* other_param_type =
57 other->GetClassFromTypeIdx(other_types->GetTypeItem(i).type_idx_);
58 if (UNLIKELY(param_type != other_param_type)) {
59 return false;
60 }
61 }
62 return true;
63 }
64
FindDexMethodIndexInOtherDexFile(const DexFile & other_dexfile)65 uint32_t MethodHelper::FindDexMethodIndexInOtherDexFile(const DexFile& other_dexfile)
66 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
67 mirror::ArtMethod* method = GetMethod();
68 const DexFile* dexfile = method->GetDexFile();
69 if (dexfile == &other_dexfile) {
70 return method->GetDexMethodIndex();
71 }
72 const DexFile::MethodId& mid = dexfile->GetMethodId(method->GetDexMethodIndex());
73 const char* mid_declaring_class_descriptor = dexfile->StringByTypeIdx(mid.class_idx_);
74 const DexFile::StringId* other_descriptor =
75 other_dexfile.FindStringId(mid_declaring_class_descriptor);
76 if (other_descriptor != nullptr) {
77 const DexFile::TypeId* other_type_id =
78 other_dexfile.FindTypeId(other_dexfile.GetIndexForStringId(*other_descriptor));
79 if (other_type_id != nullptr) {
80 const char* mid_name = dexfile->GetMethodName(mid);
81 const DexFile::StringId* other_name = other_dexfile.FindStringId(mid_name);
82 if (other_name != nullptr) {
83 uint16_t other_return_type_idx;
84 std::vector<uint16_t> other_param_type_idxs;
85 bool success = other_dexfile.CreateTypeList(
86 dexfile->GetMethodSignature(mid).ToString(), &other_return_type_idx,
87 &other_param_type_idxs);
88 if (success) {
89 const DexFile::ProtoId* other_sig =
90 other_dexfile.FindProtoId(other_return_type_idx, other_param_type_idxs);
91 if (other_sig != nullptr) {
92 const DexFile::MethodId* other_mid = other_dexfile.FindMethodId(
93 *other_type_id, *other_name, *other_sig);
94 if (other_mid != nullptr) {
95 return other_dexfile.GetIndexForMethodId(*other_mid);
96 }
97 }
98 }
99 }
100 }
101 }
102 return DexFile::kDexNoIndex;
103 }
104
FindDexMethodIndexInOtherDexFile(const DexFile & other_dexfile,uint32_t name_and_signature_idx)105 uint32_t MethodHelper::FindDexMethodIndexInOtherDexFile(const DexFile& other_dexfile,
106 uint32_t name_and_signature_idx)
107 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
108 mirror::ArtMethod* method = GetMethod();
109 const DexFile* dexfile = method->GetDexFile();
110 const uint32_t dex_method_idx = method->GetDexMethodIndex();
111 const DexFile::MethodId& mid = dexfile->GetMethodId(dex_method_idx);
112 const DexFile::MethodId& name_and_sig_mid = other_dexfile.GetMethodId(name_and_signature_idx);
113 DCHECK_STREQ(dexfile->GetMethodName(mid), other_dexfile.GetMethodName(name_and_sig_mid));
114 DCHECK_EQ(dexfile->GetMethodSignature(mid), other_dexfile.GetMethodSignature(name_and_sig_mid));
115 if (dexfile == &other_dexfile) {
116 return dex_method_idx;
117 }
118 const char* mid_declaring_class_descriptor = dexfile->StringByTypeIdx(mid.class_idx_);
119 const DexFile::StringId* other_descriptor =
120 other_dexfile.FindStringId(mid_declaring_class_descriptor);
121 if (other_descriptor != nullptr) {
122 const DexFile::TypeId* other_type_id =
123 other_dexfile.FindTypeId(other_dexfile.GetIndexForStringId(*other_descriptor));
124 if (other_type_id != nullptr) {
125 const DexFile::MethodId* other_mid = other_dexfile.FindMethodId(
126 *other_type_id, other_dexfile.GetStringId(name_and_sig_mid.name_idx_),
127 other_dexfile.GetProtoId(name_and_sig_mid.proto_idx_));
128 if (other_mid != nullptr) {
129 return other_dexfile.GetIndexForMethodId(*other_mid);
130 }
131 }
132 }
133 return DexFile::kDexNoIndex;
134 }
135
136 } // namespace art
137