da431a22da
This adds support for shared resource libraries in the new ResTable/AssetManager implementation. The dynamic package map encoded in resources.arsc is parsed and stored with LoadedArsc, and combined to form a resolved table in AssetManager2. Benchmarks show that this implementation is an order of magnitude faster on angler-userdebug (make libandroidfw_benchmarks). Test: libandroidfw_tests Change-Id: I57c80248728b63b162bf8269ac9495b53c3e7fa0
114 lines
3.7 KiB
C++
114 lines
3.7 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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#define ATRACE_TAG ATRACE_TAG_RESOURCES
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#include "androidfw/ApkAssets.h"
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#include "android-base/logging.h"
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#include "utils/Trace.h"
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#include "ziparchive/zip_archive.h"
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#include "androidfw/Asset.h"
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#include "androidfw/Util.h"
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namespace android {
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std::unique_ptr<ApkAssets> ApkAssets::Load(const std::string& path) {
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return ApkAssets::LoadImpl(path, false /*load_as_shared_library*/);
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}
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std::unique_ptr<ApkAssets> ApkAssets::LoadAsSharedLibrary(const std::string& path) {
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return ApkAssets::LoadImpl(path, true /*load_as_shared_library*/);
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}
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std::unique_ptr<ApkAssets> ApkAssets::LoadImpl(const std::string& path,
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bool load_as_shared_library) {
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ATRACE_CALL();
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::ZipArchiveHandle unmanaged_handle;
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int32_t result = ::OpenArchive(path.c_str(), &unmanaged_handle);
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if (result != 0) {
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LOG(ERROR) << ::ErrorCodeString(result);
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return {};
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}
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// Wrap the handle in a unique_ptr so it gets automatically closed.
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std::unique_ptr<ApkAssets> loaded_apk(new ApkAssets());
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loaded_apk->zip_handle_.reset(unmanaged_handle);
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::ZipString entry_name("resources.arsc");
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::ZipEntry entry;
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result = ::FindEntry(loaded_apk->zip_handle_.get(), entry_name, &entry);
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if (result != 0) {
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LOG(ERROR) << ::ErrorCodeString(result);
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return {};
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}
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if (entry.method == kCompressDeflated) {
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LOG(WARNING) << "resources.arsc is compressed.";
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}
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loaded_apk->resources_asset_ =
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loaded_apk->Open("resources.arsc", Asset::AccessMode::ACCESS_BUFFER);
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if (loaded_apk->resources_asset_ == nullptr) {
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return {};
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}
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loaded_apk->path_ = path;
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loaded_apk->loaded_arsc_ =
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LoadedArsc::Load(loaded_apk->resources_asset_->getBuffer(true /*wordAligned*/),
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loaded_apk->resources_asset_->getLength(), load_as_shared_library);
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if (loaded_apk->loaded_arsc_ == nullptr) {
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return {};
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}
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return loaded_apk;
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}
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std::unique_ptr<Asset> ApkAssets::Open(const std::string& path, Asset::AccessMode /*mode*/) const {
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ATRACE_NAME("ApkAssets::Open");
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CHECK(zip_handle_ != nullptr);
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::ZipString name(path.c_str());
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::ZipEntry entry;
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int32_t result = ::FindEntry(zip_handle_.get(), name, &entry);
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if (result != 0) {
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LOG(ERROR) << "No entry '" << path << "' found in APK.";
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return {};
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}
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if (entry.method == kCompressDeflated) {
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auto compressed_asset = util::make_unique<_CompressedAsset>();
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if (compressed_asset->openChunk(::GetFileDescriptor(zip_handle_.get()), entry.offset,
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entry.method, entry.uncompressed_length,
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entry.compressed_length) != NO_ERROR) {
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LOG(ERROR) << "Failed to decompress '" << path << "'.";
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return {};
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}
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return std::move(compressed_asset);
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} else {
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auto uncompressed_asset = util::make_unique<_FileAsset>();
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if (uncompressed_asset->openChunk(path.c_str(), ::GetFileDescriptor(zip_handle_.get()),
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entry.offset, entry.uncompressed_length) != NO_ERROR) {
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LOG(ERROR) << "Failed to mmap '" << path << "'.";
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return {};
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}
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return std::move(uncompressed_asset);
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}
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return {};
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}
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} // namespace android
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