Added new -v option to dexlayout to verify output dex file.
Passing -v will cause dexlayout to do an IR level comparison of the
output with the original input dex file. This checks that the data in
the dex files are the same, but allows for different offsets since the
output dex file may have a different layout.
Test: mm test-art-host
Bug: 36107940
Change-Id: If75a93973ffdd2d91111727f089713c800d8cee8
diff --git a/dexlayout/dex_verify.cc b/dexlayout/dex_verify.cc
new file mode 100644
index 0000000..aec1d0c
--- /dev/null
+++ b/dexlayout/dex_verify.cc
@@ -0,0 +1,187 @@
+/*
+ * 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