378 lines
13 KiB
C++
378 lines
13 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "android-base/macros.h"
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#include "Flags.h"
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#include "LoadedApk.h"
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#include "ValueVisitor.h"
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#include "process/IResourceTableConsumer.h"
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#include "process/SymbolTable.h"
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using ::android::StringPiece;
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namespace aapt {
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class DiffContext : public IAaptContext {
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public:
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DiffContext() : name_mangler_({}), symbol_table_(&name_mangler_) {
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}
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PackageType GetPackageType() override {
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// Doesn't matter.
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return PackageType::kApp;
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}
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const std::string& GetCompilationPackage() override {
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return empty_;
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}
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uint8_t GetPackageId() override {
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return 0x0;
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}
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IDiagnostics* GetDiagnostics() override {
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return &diagnostics_;
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}
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NameMangler* GetNameMangler() override {
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return &name_mangler_;
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}
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SymbolTable* GetExternalSymbols() override {
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return &symbol_table_;
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}
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bool IsVerbose() override {
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return false;
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}
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int GetMinSdkVersion() override {
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return 0;
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}
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private:
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std::string empty_;
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StdErrDiagnostics diagnostics_;
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NameMangler name_mangler_;
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SymbolTable symbol_table_;
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};
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static void EmitDiffLine(const Source& source, const StringPiece& message) {
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std::cerr << source << ": " << message << "\n";
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}
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static bool IsSymbolVisibilityDifferent(const Symbol& symbol_a, const Symbol& symbol_b) {
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return symbol_a.state != symbol_b.state;
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}
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template <typename Id>
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static bool IsIdDiff(const Symbol& symbol_a, const Maybe<Id>& id_a, const Symbol& symbol_b,
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const Maybe<Id>& id_b) {
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if (symbol_a.state == SymbolState::kPublic || symbol_b.state == SymbolState::kPublic) {
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return id_a != id_b;
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}
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return false;
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}
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static bool EmitResourceConfigValueDiff(IAaptContext* context, LoadedApk* apk_a,
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ResourceTablePackage* pkg_a, ResourceTableType* type_a,
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ResourceEntry* entry_a, ResourceConfigValue* config_value_a,
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LoadedApk* apk_b, ResourceTablePackage* pkg_b,
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ResourceTableType* type_b, ResourceEntry* entry_b,
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ResourceConfigValue* config_value_b) {
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Value* value_a = config_value_a->value.get();
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Value* value_b = config_value_b->value.get();
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if (!value_a->Equals(value_b)) {
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std::stringstream str_stream;
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str_stream << "value " << pkg_a->name << ":" << type_a->type << "/" << entry_a->name
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<< " config=" << config_value_a->config << " does not match:\n";
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value_a->Print(&str_stream);
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str_stream << "\n vs \n";
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value_b->Print(&str_stream);
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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return true;
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}
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return false;
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}
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static bool EmitResourceEntryDiff(IAaptContext* context, LoadedApk* apk_a,
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ResourceTablePackage* pkg_a, ResourceTableType* type_a,
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ResourceEntry* entry_a, LoadedApk* apk_b,
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ResourceTablePackage* pkg_b, ResourceTableType* type_b,
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ResourceEntry* entry_b) {
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bool diff = false;
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for (std::unique_ptr<ResourceConfigValue>& config_value_a : entry_a->values) {
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ResourceConfigValue* config_value_b = entry_b->FindValue(config_value_a->config);
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if (!config_value_b) {
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std::stringstream str_stream;
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str_stream << "missing " << pkg_a->name << ":" << type_a->type << "/" << entry_a->name
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<< " config=" << config_value_a->config;
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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} else {
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diff |=
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EmitResourceConfigValueDiff(context, apk_a, pkg_a, type_a, entry_a, config_value_a.get(),
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apk_b, pkg_b, type_b, entry_b, config_value_b);
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}
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}
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// Check for any newly added config values.
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for (std::unique_ptr<ResourceConfigValue>& config_value_b : entry_b->values) {
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ResourceConfigValue* config_value_a = entry_a->FindValue(config_value_b->config);
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if (!config_value_a) {
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std::stringstream str_stream;
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str_stream << "new config " << pkg_b->name << ":" << type_b->type << "/" << entry_b->name
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<< " config=" << config_value_b->config;
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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}
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}
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return false;
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}
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static bool EmitResourceTypeDiff(IAaptContext* context, LoadedApk* apk_a,
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ResourceTablePackage* pkg_a, ResourceTableType* type_a,
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LoadedApk* apk_b, ResourceTablePackage* pkg_b,
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ResourceTableType* type_b) {
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bool diff = false;
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for (std::unique_ptr<ResourceEntry>& entry_a : type_a->entries) {
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ResourceEntry* entry_b = type_b->FindEntry(entry_a->name);
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if (!entry_b) {
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std::stringstream str_stream;
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str_stream << "missing " << pkg_a->name << ":" << type_a->type << "/" << entry_a->name;
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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} else {
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if (IsSymbolVisibilityDifferent(entry_a->symbol_status, entry_b->symbol_status)) {
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std::stringstream str_stream;
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str_stream << pkg_a->name << ":" << type_a->type << "/" << entry_a->name
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<< " has different visibility (";
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if (entry_b->symbol_status.state == SymbolState::kPublic) {
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str_stream << "PUBLIC";
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} else {
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str_stream << "PRIVATE";
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}
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str_stream << " vs ";
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if (entry_a->symbol_status.state == SymbolState::kPublic) {
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str_stream << "PUBLIC";
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} else {
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str_stream << "PRIVATE";
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}
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str_stream << ")";
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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} else if (IsIdDiff(entry_a->symbol_status, entry_a->id, entry_b->symbol_status,
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entry_b->id)) {
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std::stringstream str_stream;
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str_stream << pkg_a->name << ":" << type_a->type << "/" << entry_a->name
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<< " has different public ID (";
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if (entry_b->id) {
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str_stream << "0x" << std::hex << entry_b->id.value();
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} else {
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str_stream << "none";
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}
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str_stream << " vs ";
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if (entry_a->id) {
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str_stream << "0x " << std::hex << entry_a->id.value();
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} else {
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str_stream << "none";
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}
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str_stream << ")";
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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}
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diff |= EmitResourceEntryDiff(context, apk_a, pkg_a, type_a, entry_a.get(), apk_b, pkg_b,
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type_b, entry_b);
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}
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}
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// Check for any newly added entries.
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for (std::unique_ptr<ResourceEntry>& entry_b : type_b->entries) {
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ResourceEntry* entry_a = type_a->FindEntry(entry_b->name);
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if (!entry_a) {
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std::stringstream str_stream;
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str_stream << "new entry " << pkg_b->name << ":" << type_b->type << "/" << entry_b->name;
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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}
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}
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return diff;
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}
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static bool EmitResourcePackageDiff(IAaptContext* context, LoadedApk* apk_a,
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ResourceTablePackage* pkg_a, LoadedApk* apk_b,
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ResourceTablePackage* pkg_b) {
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bool diff = false;
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for (std::unique_ptr<ResourceTableType>& type_a : pkg_a->types) {
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ResourceTableType* type_b = pkg_b->FindType(type_a->type);
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if (!type_b) {
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std::stringstream str_stream;
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str_stream << "missing " << pkg_a->name << ":" << type_a->type;
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EmitDiffLine(apk_a->GetSource(), str_stream.str());
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diff = true;
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} else {
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if (IsSymbolVisibilityDifferent(type_a->symbol_status, type_b->symbol_status)) {
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std::stringstream str_stream;
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str_stream << pkg_a->name << ":" << type_a->type << " has different visibility (";
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if (type_b->symbol_status.state == SymbolState::kPublic) {
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str_stream << "PUBLIC";
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} else {
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str_stream << "PRIVATE";
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}
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str_stream << " vs ";
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if (type_a->symbol_status.state == SymbolState::kPublic) {
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str_stream << "PUBLIC";
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} else {
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str_stream << "PRIVATE";
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}
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str_stream << ")";
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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} else if (IsIdDiff(type_a->symbol_status, type_a->id, type_b->symbol_status, type_b->id)) {
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std::stringstream str_stream;
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str_stream << pkg_a->name << ":" << type_a->type << " has different public ID (";
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if (type_b->id) {
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str_stream << "0x" << std::hex << type_b->id.value();
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} else {
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str_stream << "none";
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}
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str_stream << " vs ";
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if (type_a->id) {
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str_stream << "0x " << std::hex << type_a->id.value();
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} else {
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str_stream << "none";
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}
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str_stream << ")";
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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}
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diff |= EmitResourceTypeDiff(context, apk_a, pkg_a, type_a.get(), apk_b, pkg_b, type_b);
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}
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}
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// Check for any newly added types.
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for (std::unique_ptr<ResourceTableType>& type_b : pkg_b->types) {
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ResourceTableType* type_a = pkg_a->FindType(type_b->type);
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if (!type_a) {
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std::stringstream str_stream;
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str_stream << "new type " << pkg_b->name << ":" << type_b->type;
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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}
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}
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return diff;
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}
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static bool EmitResourceTableDiff(IAaptContext* context, LoadedApk* apk_a, LoadedApk* apk_b) {
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ResourceTable* table_a = apk_a->GetResourceTable();
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ResourceTable* table_b = apk_b->GetResourceTable();
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bool diff = false;
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for (std::unique_ptr<ResourceTablePackage>& pkg_a : table_a->packages) {
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ResourceTablePackage* pkg_b = table_b->FindPackage(pkg_a->name);
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if (!pkg_b) {
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std::stringstream str_stream;
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str_stream << "missing package " << pkg_a->name;
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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} else {
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if (pkg_a->id != pkg_b->id) {
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std::stringstream str_stream;
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str_stream << "package '" << pkg_a->name << "' has different id (";
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if (pkg_b->id) {
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str_stream << "0x" << std::hex << pkg_b->id.value();
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} else {
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str_stream << "none";
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}
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str_stream << " vs ";
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if (pkg_a->id) {
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str_stream << "0x" << std::hex << pkg_a->id.value();
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} else {
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str_stream << "none";
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}
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str_stream << ")";
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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}
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diff |= EmitResourcePackageDiff(context, apk_a, pkg_a.get(), apk_b, pkg_b);
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}
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}
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// Check for any newly added packages.
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for (std::unique_ptr<ResourceTablePackage>& pkg_b : table_b->packages) {
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ResourceTablePackage* pkg_a = table_a->FindPackage(pkg_b->name);
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if (!pkg_a) {
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std::stringstream str_stream;
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str_stream << "new package " << pkg_b->name;
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EmitDiffLine(apk_b->GetSource(), str_stream.str());
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diff = true;
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}
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}
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return diff;
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}
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class ZeroingReferenceVisitor : public DescendingValueVisitor {
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public:
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using DescendingValueVisitor::Visit;
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void Visit(Reference* ref) override {
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if (ref->name && ref->id) {
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if (ref->id.value().package_id() == kAppPackageId) {
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ref->id = {};
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}
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}
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}
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};
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static void ZeroOutAppReferences(ResourceTable* table) {
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ZeroingReferenceVisitor visitor;
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VisitAllValuesInTable(table, &visitor);
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}
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int Diff(const std::vector<StringPiece>& args) {
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DiffContext context;
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Flags flags;
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if (!flags.Parse("aapt2 diff", args, &std::cerr)) {
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return 1;
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}
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if (flags.GetArgs().size() != 2u) {
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std::cerr << "must have two apks as arguments.\n\n";
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flags.Usage("aapt2 diff", &std::cerr);
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return 1;
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}
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std::unique_ptr<LoadedApk> apk_a = LoadedApk::LoadApkFromPath(&context, flags.GetArgs()[0]);
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std::unique_ptr<LoadedApk> apk_b = LoadedApk::LoadApkFromPath(&context, flags.GetArgs()[1]);
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if (!apk_a || !apk_b) {
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return 1;
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}
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// Zero out Application IDs in references.
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ZeroOutAppReferences(apk_a->GetResourceTable());
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ZeroOutAppReferences(apk_b->GetResourceTable());
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if (EmitResourceTableDiff(&context, apk_a.get(), apk_b.get())) {
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// We emitted a diff, so return 1 (failure).
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return 1;
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}
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return 0;
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}
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} // namespace aapt
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