| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| * Implementation file of dex ir verifier. |
| * |
| * Compares two dex files at the IR level, allowing differences in layout, but not in data. |
| */ |
| |
| #include "dex_verify.h" |
| |
| #include "android-base/stringprintf.h" |
| |
| namespace art { |
| |
| using android::base::StringPrintf; |
| |
| bool VerifyOutputDexFile(dex_ir::Header* orig_header, |
| dex_ir::Header* output_header, |
| std::string* error_msg) { |
| dex_ir::Collections& orig = orig_header->GetCollections(); |
| dex_ir::Collections& output = output_header->GetCollections(); |
| |
| // Compare all id sections. |
| if (!VerifyIds(orig.StringIds(), output.StringIds(), "string ids", error_msg) || |
| !VerifyIds(orig.TypeIds(), output.TypeIds(), "type ids", error_msg) || |
| !VerifyIds(orig.ProtoIds(), output.ProtoIds(), "proto ids", error_msg) || |
| !VerifyIds(orig.FieldIds(), output.FieldIds(), "field ids", error_msg) || |
| !VerifyIds(orig.MethodIds(), output.MethodIds(), "method ids", error_msg)) { |
| return false; |
| } |
| return true; |
| } |
| |
| template<class T> bool VerifyIds(std::vector<std::unique_ptr<T>>& orig, |
| std::vector<std::unique_ptr<T>>& output, |
| const char* section_name, |
| std::string* error_msg) { |
| if (orig.size() != output.size()) { |
| *error_msg = StringPrintf( |
| "Mismatched size for %s section, %zu vs %zu.", section_name, orig.size(), output.size()); |
| return false; |
| } |
| for (size_t i = 0; i < orig.size(); ++i) { |
| if (!VerifyId(orig[i].get(), output[i].get(), error_msg)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool VerifyId(dex_ir::StringId* orig, dex_ir::StringId* output, std::string* error_msg) { |
| if (strcmp(orig->Data(), output->Data()) != 0) { |
| *error_msg = StringPrintf("Mismatched string data for string id %u @ orig offset %x, %s vs %s.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Data(), |
| output->Data()); |
| return false; |
| } |
| return true; |
| } |
| |
| bool VerifyId(dex_ir::TypeId* orig, dex_ir::TypeId* output, std::string* error_msg) { |
| if (orig->GetStringId()->GetIndex() != output->GetStringId()->GetIndex()) { |
| *error_msg = StringPrintf("Mismatched string index for type id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->GetStringId()->GetIndex(), |
| output->GetStringId()->GetIndex()); |
| return false; |
| } |
| return true; |
| } |
| |
| bool VerifyId(dex_ir::ProtoId* orig, dex_ir::ProtoId* output, std::string* error_msg) { |
| if (orig->Shorty()->GetIndex() != output->Shorty()->GetIndex()) { |
| *error_msg = StringPrintf("Mismatched string index for proto id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Shorty()->GetIndex(), |
| output->Shorty()->GetIndex()); |
| return false; |
| } |
| if (orig->ReturnType()->GetIndex() != output->ReturnType()->GetIndex()) { |
| *error_msg = StringPrintf("Mismatched type index for proto id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->ReturnType()->GetIndex(), |
| output->ReturnType()->GetIndex()); |
| return false; |
| } |
| if (!VerifyTypeList(orig->Parameters(), output->Parameters())) { |
| *error_msg = StringPrintf("Mismatched type list for proto id %u @ orig offset %x.", |
| orig->GetIndex(), |
| orig->GetOffset()); |
| } |
| return true; |
| } |
| |
| bool VerifyId(dex_ir::FieldId* orig, dex_ir::FieldId* output, std::string* error_msg) { |
| if (orig->Class()->GetIndex() != output->Class()->GetIndex()) { |
| *error_msg = |
| StringPrintf("Mismatched class type index for field id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Class()->GetIndex(), |
| output->Class()->GetIndex()); |
| return false; |
| } |
| if (orig->Type()->GetIndex() != output->Type()->GetIndex()) { |
| *error_msg = StringPrintf("Mismatched type index for field id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Class()->GetIndex(), |
| output->Class()->GetIndex()); |
| return false; |
| } |
| if (orig->Name()->GetIndex() != output->Name()->GetIndex()) { |
| *error_msg = StringPrintf("Mismatched string index for field id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Name()->GetIndex(), |
| output->Name()->GetIndex()); |
| return false; |
| } |
| return true; |
| } |
| |
| bool VerifyId(dex_ir::MethodId* orig, dex_ir::MethodId* output, std::string* error_msg) { |
| if (orig->Class()->GetIndex() != output->Class()->GetIndex()) { |
| *error_msg = StringPrintf("Mismatched type index for method id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Class()->GetIndex(), |
| output->Class()->GetIndex()); |
| return false; |
| } |
| if (orig->Proto()->GetIndex() != output->Proto()->GetIndex()) { |
| *error_msg = StringPrintf("Mismatched proto index for method id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Class()->GetIndex(), |
| output->Class()->GetIndex()); |
| return false; |
| } |
| if (orig->Name()->GetIndex() != output->Name()->GetIndex()) { |
| *error_msg = |
| StringPrintf("Mismatched string index for method id %u @ orig offset %x, %u vs %u.", |
| orig->GetIndex(), |
| orig->GetOffset(), |
| orig->Name()->GetIndex(), |
| output->Name()->GetIndex()); |
| return false; |
| } |
| return true; |
| } |
| |
| bool VerifyTypeList(const dex_ir::TypeList* orig, const dex_ir::TypeList* output) { |
| if (orig == nullptr || output == nullptr) { |
| return orig == output; |
| } |
| const dex_ir::TypeIdVector* orig_list = orig->GetTypeList(); |
| const dex_ir::TypeIdVector* output_list = output->GetTypeList(); |
| if (orig_list->size() != output_list->size()) { |
| return false; |
| } |
| for (size_t i = 0; i < orig_list->size(); ++i) { |
| if ((*orig_list)[i]->GetIndex() != (*output_list)[i]->GetIndex()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| } // namespace art |