| /* | |
| * Copyright (C) 2016 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. | |
| */ | |
| #define ATRACE_TAG ATRACE_TAG_RESOURCES | |
| #include "androidfw/LoadedArsc.h" | |
| #include <algorithm> | |
| #include <cstddef> | |
| #include <limits> | |
| #include "android-base/logging.h" | |
| #include "android-base/stringprintf.h" | |
| #include "utils/ByteOrder.h" | |
| #include "utils/Trace.h" | |
| #ifdef _WIN32 | |
| #ifdef ERROR | |
| #undef ERROR | |
| #endif | |
| #endif | |
| #include "androidfw/ByteBucketArray.h" | |
| #include "androidfw/Chunk.h" | |
| #include "androidfw/ResourceUtils.h" | |
| #include "androidfw/Util.h" | |
| using ::android::base::StringPrintf; | |
| namespace android { | |
| constexpr const static int kAppPackageId = 0x7f; | |
| namespace { | |
| // Builder that helps accumulate Type structs and then create a single | |
| // contiguous block of memory to store both the TypeSpec struct and | |
| // the Type structs. | |
| class TypeSpecPtrBuilder { | |
| public: | |
| explicit TypeSpecPtrBuilder(const ResTable_typeSpec* header) | |
| : header_(header) { | |
| } | |
| void AddType(const ResTable_type* type) { | |
| types_.push_back(type); | |
| } | |
| TypeSpecPtr Build() { | |
| // Check for overflow. | |
| using ElementType = const ResTable_type*; | |
| if ((std::numeric_limits<size_t>::max() - sizeof(TypeSpec)) / sizeof(ElementType) < | |
| types_.size()) { | |
| return {}; | |
| } | |
| TypeSpec* type_spec = | |
| (TypeSpec*)::malloc(sizeof(TypeSpec) + (types_.size() * sizeof(ElementType))); | |
| type_spec->type_spec = header_; | |
| type_spec->type_count = types_.size(); | |
| memcpy(type_spec + 1, types_.data(), types_.size() * sizeof(ElementType)); | |
| return TypeSpecPtr(type_spec); | |
| } | |
| private: | |
| DISALLOW_COPY_AND_ASSIGN(TypeSpecPtrBuilder); | |
| const ResTable_typeSpec* header_; | |
| std::vector<const ResTable_type*> types_; | |
| }; | |
| } // namespace | |
| LoadedPackage::LoadedPackage() = default; | |
| LoadedPackage::~LoadedPackage() = default; | |
| // Precondition: The header passed in has already been verified, so reading any fields and trusting | |
| // the ResChunk_header is safe. | |
| static bool VerifyResTableType(const ResTable_type* header) { | |
| if (header->id == 0) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_TYPE has invalid ID 0."; | |
| return false; | |
| } | |
| const size_t entry_count = dtohl(header->entryCount); | |
| if (entry_count > std::numeric_limits<uint16_t>::max()) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_TYPE has too many entries (" << entry_count << ")."; | |
| return false; | |
| } | |
| // Make sure that there is enough room for the entry offsets. | |
| const size_t offsets_offset = dtohs(header->header.headerSize); | |
| const size_t entries_offset = dtohl(header->entriesStart); | |
| const size_t offsets_length = sizeof(uint32_t) * entry_count; | |
| if (offsets_offset > entries_offset || entries_offset - offsets_offset < offsets_length) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_TYPE entry offsets overlap actual entry data."; | |
| return false; | |
| } | |
| if (entries_offset > dtohl(header->header.size)) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_TYPE entry offsets extend beyond chunk."; | |
| return false; | |
| } | |
| if (entries_offset & 0x03) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_TYPE entries start at unaligned address."; | |
| return false; | |
| } | |
| return true; | |
| } | |
| static bool VerifyResTableEntry(const ResTable_type* type, uint32_t entry_offset) { | |
| // Check that the offset is aligned. | |
| if (entry_offset & 0x03) { | |
| LOG(ERROR) << "Entry at offset " << entry_offset << " is not 4-byte aligned."; | |
| return false; | |
| } | |
| // Check that the offset doesn't overflow. | |
| if (entry_offset > std::numeric_limits<uint32_t>::max() - dtohl(type->entriesStart)) { | |
| // Overflow in offset. | |
| LOG(ERROR) << "Entry at offset " << entry_offset << " is too large."; | |
| return false; | |
| } | |
| const size_t chunk_size = dtohl(type->header.size); | |
| entry_offset += dtohl(type->entriesStart); | |
| if (entry_offset > chunk_size - sizeof(ResTable_entry)) { | |
| LOG(ERROR) << "Entry at offset " << entry_offset | |
| << " is too large. No room for ResTable_entry."; | |
| return false; | |
| } | |
| const ResTable_entry* entry = reinterpret_cast<const ResTable_entry*>( | |
| reinterpret_cast<const uint8_t*>(type) + entry_offset); | |
| const size_t entry_size = dtohs(entry->size); | |
| if (entry_size < sizeof(*entry)) { | |
| LOG(ERROR) << "ResTable_entry size " << entry_size << " at offset " << entry_offset | |
| << " is too small."; | |
| return false; | |
| } | |
| if (entry_size > chunk_size || entry_offset > chunk_size - entry_size) { | |
| LOG(ERROR) << "ResTable_entry size " << entry_size << " at offset " << entry_offset | |
| << " is too large."; | |
| return false; | |
| } | |
| if (entry_size < sizeof(ResTable_map_entry)) { | |
| // There needs to be room for one Res_value struct. | |
| if (entry_offset + entry_size > chunk_size - sizeof(Res_value)) { | |
| LOG(ERROR) << "No room for Res_value after ResTable_entry at offset " << entry_offset | |
| << " for type " << (int)type->id << "."; | |
| return false; | |
| } | |
| const Res_value* value = | |
| reinterpret_cast<const Res_value*>(reinterpret_cast<const uint8_t*>(entry) + entry_size); | |
| const size_t value_size = dtohs(value->size); | |
| if (value_size < sizeof(Res_value)) { | |
| LOG(ERROR) << "Res_value at offset " << entry_offset << " is too small."; | |
| return false; | |
| } | |
| if (value_size > chunk_size || entry_offset + entry_size > chunk_size - value_size) { | |
| LOG(ERROR) << "Res_value size " << value_size << " at offset " << entry_offset | |
| << " is too large."; | |
| return false; | |
| } | |
| } else { | |
| const ResTable_map_entry* map = reinterpret_cast<const ResTable_map_entry*>(entry); | |
| const size_t map_entry_count = dtohl(map->count); | |
| size_t map_entries_start = entry_offset + entry_size; | |
| if (map_entries_start & 0x03) { | |
| LOG(ERROR) << "Map entries at offset " << entry_offset << " start at unaligned offset."; | |
| return false; | |
| } | |
| // Each entry is sizeof(ResTable_map) big. | |
| if (map_entry_count > ((chunk_size - map_entries_start) / sizeof(ResTable_map))) { | |
| LOG(ERROR) << "Too many map entries in ResTable_map_entry at offset " << entry_offset << "."; | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| LoadedPackage::iterator::iterator(const LoadedPackage* lp, size_t ti, size_t ei) | |
| : loadedPackage_(lp), | |
| typeIndex_(ti), | |
| entryIndex_(ei), | |
| typeIndexEnd_(lp->resource_ids_.size() + 1) { | |
| while (typeIndex_ < typeIndexEnd_ && loadedPackage_->resource_ids_[typeIndex_] == 0) { | |
| typeIndex_++; | |
| } | |
| } | |
| LoadedPackage::iterator& LoadedPackage::iterator::operator++() { | |
| while (typeIndex_ < typeIndexEnd_) { | |
| if (entryIndex_ + 1 < loadedPackage_->resource_ids_[typeIndex_]) { | |
| entryIndex_++; | |
| break; | |
| } | |
| entryIndex_ = 0; | |
| typeIndex_++; | |
| if (typeIndex_ < typeIndexEnd_ && loadedPackage_->resource_ids_[typeIndex_] != 0) { | |
| break; | |
| } | |
| } | |
| return *this; | |
| } | |
| uint32_t LoadedPackage::iterator::operator*() const { | |
| if (typeIndex_ >= typeIndexEnd_) { | |
| return 0; | |
| } | |
| return make_resid(loadedPackage_->package_id_, typeIndex_ + loadedPackage_->type_id_offset_, | |
| entryIndex_); | |
| } | |
| const ResTable_entry* LoadedPackage::GetEntry(const ResTable_type* type_chunk, | |
| uint16_t entry_index) { | |
| uint32_t entry_offset = GetEntryOffset(type_chunk, entry_index); | |
| if (entry_offset == ResTable_type::NO_ENTRY) { | |
| return nullptr; | |
| } | |
| return GetEntryFromOffset(type_chunk, entry_offset); | |
| } | |
| uint32_t LoadedPackage::GetEntryOffset(const ResTable_type* type_chunk, uint16_t entry_index) { | |
| // The configuration matches and is better than the previous selection. | |
| // Find the entry value if it exists for this configuration. | |
| const size_t entry_count = dtohl(type_chunk->entryCount); | |
| const size_t offsets_offset = dtohs(type_chunk->header.headerSize); | |
| // Check if there is the desired entry in this type. | |
| if (type_chunk->flags & ResTable_type::FLAG_SPARSE) { | |
| // This is encoded as a sparse map, so perform a binary search. | |
| const ResTable_sparseTypeEntry* sparse_indices = | |
| reinterpret_cast<const ResTable_sparseTypeEntry*>( | |
| reinterpret_cast<const uint8_t*>(type_chunk) + offsets_offset); | |
| const ResTable_sparseTypeEntry* sparse_indices_end = sparse_indices + entry_count; | |
| const ResTable_sparseTypeEntry* result = | |
| std::lower_bound(sparse_indices, sparse_indices_end, entry_index, | |
| [](const ResTable_sparseTypeEntry& entry, uint16_t entry_idx) { | |
| return dtohs(entry.idx) < entry_idx; | |
| }); | |
| if (result == sparse_indices_end || dtohs(result->idx) != entry_index) { | |
| // No entry found. | |
| return ResTable_type::NO_ENTRY; | |
| } | |
| // Extract the offset from the entry. Each offset must be a multiple of 4 so we store it as | |
| // the real offset divided by 4. | |
| return uint32_t{dtohs(result->offset)} * 4u; | |
| } | |
| // This type is encoded as a dense array. | |
| if (entry_index >= entry_count) { | |
| // This entry cannot be here. | |
| return ResTable_type::NO_ENTRY; | |
| } | |
| const uint32_t* entry_offsets = reinterpret_cast<const uint32_t*>( | |
| reinterpret_cast<const uint8_t*>(type_chunk) + offsets_offset); | |
| return dtohl(entry_offsets[entry_index]); | |
| } | |
| const ResTable_entry* LoadedPackage::GetEntryFromOffset(const ResTable_type* type_chunk, | |
| uint32_t offset) { | |
| if (UNLIKELY(!VerifyResTableEntry(type_chunk, offset))) { | |
| return nullptr; | |
| } | |
| return reinterpret_cast<const ResTable_entry*>(reinterpret_cast<const uint8_t*>(type_chunk) + | |
| offset + dtohl(type_chunk->entriesStart)); | |
| } | |
| void LoadedPackage::CollectConfigurations(bool exclude_mipmap, | |
| std::set<ResTable_config>* out_configs) const { | |
| const static std::u16string kMipMap = u"mipmap"; | |
| const size_t type_count = type_specs_.size(); | |
| for (size_t i = 0; i < type_count; i++) { | |
| const TypeSpecPtr& type_spec = type_specs_[i]; | |
| if (type_spec != nullptr) { | |
| if (exclude_mipmap) { | |
| const int type_idx = type_spec->type_spec->id - 1; | |
| size_t type_name_len; | |
| const char16_t* type_name16 = type_string_pool_.stringAt(type_idx, &type_name_len); | |
| if (type_name16 != nullptr) { | |
| if (kMipMap.compare(0, std::u16string::npos, type_name16, type_name_len) == 0) { | |
| // This is a mipmap type, skip collection. | |
| continue; | |
| } | |
| } | |
| const char* type_name = type_string_pool_.string8At(type_idx, &type_name_len); | |
| if (type_name != nullptr) { | |
| if (strncmp(type_name, "mipmap", type_name_len) == 0) { | |
| // This is a mipmap type, skip collection. | |
| continue; | |
| } | |
| } | |
| } | |
| const auto iter_end = type_spec->types + type_spec->type_count; | |
| for (auto iter = type_spec->types; iter != iter_end; ++iter) { | |
| ResTable_config config; | |
| config.copyFromDtoH((*iter)->config); | |
| out_configs->insert(config); | |
| } | |
| } | |
| } | |
| } | |
| void LoadedPackage::CollectLocales(bool canonicalize, std::set<std::string>* out_locales) const { | |
| char temp_locale[RESTABLE_MAX_LOCALE_LEN]; | |
| const size_t type_count = type_specs_.size(); | |
| for (size_t i = 0; i < type_count; i++) { | |
| const TypeSpecPtr& type_spec = type_specs_[i]; | |
| if (type_spec != nullptr) { | |
| const auto iter_end = type_spec->types + type_spec->type_count; | |
| for (auto iter = type_spec->types; iter != iter_end; ++iter) { | |
| ResTable_config configuration; | |
| configuration.copyFromDtoH((*iter)->config); | |
| if (configuration.locale != 0) { | |
| configuration.getBcp47Locale(temp_locale, canonicalize); | |
| std::string locale(temp_locale); | |
| out_locales->insert(std::move(locale)); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| uint32_t LoadedPackage::FindEntryByName(const std::u16string& type_name, | |
| const std::u16string& entry_name) const { | |
| ssize_t type_idx = type_string_pool_.indexOfString(type_name.data(), type_name.size()); | |
| if (type_idx < 0) { | |
| return 0u; | |
| } | |
| ssize_t key_idx = key_string_pool_.indexOfString(entry_name.data(), entry_name.size()); | |
| if (key_idx < 0) { | |
| return 0u; | |
| } | |
| const TypeSpec* type_spec = type_specs_[type_idx].get(); | |
| if (type_spec == nullptr) { | |
| return 0u; | |
| } | |
| const auto iter_end = type_spec->types + type_spec->type_count; | |
| for (auto iter = type_spec->types; iter != iter_end; ++iter) { | |
| const ResTable_type* type = *iter; | |
| size_t entry_count = dtohl(type->entryCount); | |
| for (size_t entry_idx = 0; entry_idx < entry_count; entry_idx++) { | |
| const uint32_t* entry_offsets = reinterpret_cast<const uint32_t*>( | |
| reinterpret_cast<const uint8_t*>(type) + dtohs(type->header.headerSize)); | |
| const uint32_t offset = dtohl(entry_offsets[entry_idx]); | |
| if (offset != ResTable_type::NO_ENTRY) { | |
| const ResTable_entry* entry = reinterpret_cast<const ResTable_entry*>( | |
| reinterpret_cast<const uint8_t*>(type) + dtohl(type->entriesStart) + offset); | |
| if (dtohl(entry->key.index) == static_cast<uint32_t>(key_idx)) { | |
| // The package ID will be overridden by the caller (due to runtime assignment of package | |
| // IDs for shared libraries). | |
| return make_resid(0x00, type_idx + type_id_offset_ + 1, entry_idx); | |
| } | |
| } | |
| } | |
| } | |
| return 0u; | |
| } | |
| const LoadedPackage* LoadedArsc::GetPackageById(uint8_t package_id) const { | |
| for (const auto& loaded_package : packages_) { | |
| if (loaded_package->GetPackageId() == package_id) { | |
| return loaded_package.get(); | |
| } | |
| } | |
| return nullptr; | |
| } | |
| std::unique_ptr<const LoadedPackage> LoadedPackage::Load(const Chunk& chunk, | |
| package_property_t property_flags) { | |
| ATRACE_NAME("LoadedPackage::Load"); | |
| std::unique_ptr<LoadedPackage> loaded_package(new LoadedPackage()); | |
| // typeIdOffset was added at some point, but we still must recognize apps built before this | |
| // was added. | |
| constexpr size_t kMinPackageSize = | |
| sizeof(ResTable_package) - sizeof(ResTable_package::typeIdOffset); | |
| const ResTable_package* header = chunk.header<ResTable_package, kMinPackageSize>(); | |
| if (header == nullptr) { | |
| LOG(ERROR) << "RES_TABLE_PACKAGE_TYPE too small."; | |
| return {}; | |
| } | |
| if ((property_flags & PROPERTY_SYSTEM) != 0) { | |
| loaded_package->property_flags_ |= PROPERTY_SYSTEM; | |
| } | |
| if ((property_flags & PROPERTY_LOADER) != 0) { | |
| loaded_package->property_flags_ |= PROPERTY_LOADER; | |
| } | |
| if ((property_flags & PROPERTY_OVERLAY) != 0) { | |
| // Overlay resources must have an exclusive resource id space for referencing internal | |
| // resources. | |
| loaded_package->property_flags_ |= PROPERTY_OVERLAY | PROPERTY_DYNAMIC; | |
| } | |
| loaded_package->package_id_ = dtohl(header->id); | |
| if (loaded_package->package_id_ == 0 || | |
| (loaded_package->package_id_ == kAppPackageId && (property_flags & PROPERTY_DYNAMIC) != 0)) { | |
| loaded_package->property_flags_ |= PROPERTY_DYNAMIC; | |
| } | |
| if (header->header.headerSize >= sizeof(ResTable_package)) { | |
| uint32_t type_id_offset = dtohl(header->typeIdOffset); | |
| if (type_id_offset > std::numeric_limits<uint8_t>::max()) { | |
| LOG(ERROR) << "RES_TABLE_PACKAGE_TYPE type ID offset too large."; | |
| return {}; | |
| } | |
| loaded_package->type_id_offset_ = static_cast<int>(type_id_offset); | |
| } | |
| util::ReadUtf16StringFromDevice(header->name, arraysize(header->name), | |
| &loaded_package->package_name_); | |
| // A map of TypeSpec builders, each associated with an type index. | |
| // We use these to accumulate the set of Types available for a TypeSpec, and later build a single, | |
| // contiguous block of memory that holds all the Types together with the TypeSpec. | |
| std::unordered_map<int, std::unique_ptr<TypeSpecPtrBuilder>> type_builder_map; | |
| ChunkIterator iter(chunk.data_ptr(), chunk.data_size()); | |
| while (iter.HasNext()) { | |
| const Chunk child_chunk = iter.Next(); | |
| switch (child_chunk.type()) { | |
| case RES_STRING_POOL_TYPE: { | |
| const uintptr_t pool_address = | |
| reinterpret_cast<uintptr_t>(child_chunk.header<ResChunk_header>()); | |
| const uintptr_t header_address = reinterpret_cast<uintptr_t>(header); | |
| if (pool_address == header_address + dtohl(header->typeStrings)) { | |
| // This string pool is the type string pool. | |
| status_t err = loaded_package->type_string_pool_.setTo( | |
| child_chunk.header<ResStringPool_header>(), child_chunk.size()); | |
| if (err != NO_ERROR) { | |
| LOG(ERROR) << "RES_STRING_POOL_TYPE for types corrupt."; | |
| return {}; | |
| } | |
| } else if (pool_address == header_address + dtohl(header->keyStrings)) { | |
| // This string pool is the key string pool. | |
| status_t err = loaded_package->key_string_pool_.setTo( | |
| child_chunk.header<ResStringPool_header>(), child_chunk.size()); | |
| if (err != NO_ERROR) { | |
| LOG(ERROR) << "RES_STRING_POOL_TYPE for keys corrupt."; | |
| return {}; | |
| } | |
| } else { | |
| LOG(WARNING) << "Too many RES_STRING_POOL_TYPEs found in RES_TABLE_PACKAGE_TYPE."; | |
| } | |
| } break; | |
| case RES_TABLE_TYPE_SPEC_TYPE: { | |
| const ResTable_typeSpec* type_spec = child_chunk.header<ResTable_typeSpec>(); | |
| if (type_spec == nullptr) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_SPEC_TYPE too small."; | |
| return {}; | |
| } | |
| if (type_spec->id == 0) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_SPEC_TYPE has invalid ID 0."; | |
| return {}; | |
| } | |
| if (loaded_package->type_id_offset_ + static_cast<int>(type_spec->id) > | |
| std::numeric_limits<uint8_t>::max()) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_SPEC_TYPE has out of range ID."; | |
| return {}; | |
| } | |
| // The data portion of this chunk contains entry_count 32bit entries, | |
| // each one representing a set of flags. | |
| // Here we only validate that the chunk is well formed. | |
| const size_t entry_count = dtohl(type_spec->entryCount); | |
| // There can only be 2^16 entries in a type, because that is the ID | |
| // space for entries (EEEE) in the resource ID 0xPPTTEEEE. | |
| if (entry_count > std::numeric_limits<uint16_t>::max()) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_SPEC_TYPE has too many entries (" << entry_count << ")."; | |
| return {}; | |
| } | |
| if (entry_count * sizeof(uint32_t) > chunk.data_size()) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_SPEC_TYPE too small to hold entries."; | |
| return {}; | |
| } | |
| std::unique_ptr<TypeSpecPtrBuilder>& builder_ptr = type_builder_map[type_spec->id - 1]; | |
| if (builder_ptr == nullptr) { | |
| builder_ptr = util::make_unique<TypeSpecPtrBuilder>(type_spec); | |
| loaded_package->resource_ids_.set(type_spec->id, entry_count); | |
| } else { | |
| LOG(WARNING) << StringPrintf("RES_TABLE_TYPE_SPEC_TYPE already defined for ID %02x", | |
| type_spec->id); | |
| } | |
| } break; | |
| case RES_TABLE_TYPE_TYPE: { | |
| const ResTable_type* type = child_chunk.header<ResTable_type, kResTableTypeMinSize>(); | |
| if (type == nullptr) { | |
| LOG(ERROR) << "RES_TABLE_TYPE_TYPE too small."; | |
| return {}; | |
| } | |
| if (!VerifyResTableType(type)) { | |
| return {}; | |
| } | |
| // Type chunks must be preceded by their TypeSpec chunks. | |
| std::unique_ptr<TypeSpecPtrBuilder>& builder_ptr = type_builder_map[type->id - 1]; | |
| if (builder_ptr != nullptr) { | |
| builder_ptr->AddType(type); | |
| } else { | |
| LOG(ERROR) << StringPrintf( | |
| "RES_TABLE_TYPE_TYPE with ID %02x found without preceding RES_TABLE_TYPE_SPEC_TYPE.", | |
| type->id); | |
| return {}; | |
| } | |
| } break; | |
| case RES_TABLE_LIBRARY_TYPE: { | |
| const ResTable_lib_header* lib = child_chunk.header<ResTable_lib_header>(); | |
| if (lib == nullptr) { | |
| LOG(ERROR) << "RES_TABLE_LIBRARY_TYPE too small."; | |
| return {}; | |
| } | |
| if (child_chunk.data_size() / sizeof(ResTable_lib_entry) < dtohl(lib->count)) { | |
| LOG(ERROR) << "RES_TABLE_LIBRARY_TYPE too small to hold entries."; | |
| return {}; | |
| } | |
| loaded_package->dynamic_package_map_.reserve(dtohl(lib->count)); | |
| const ResTable_lib_entry* const entry_begin = | |
| reinterpret_cast<const ResTable_lib_entry*>(child_chunk.data_ptr()); | |
| const ResTable_lib_entry* const entry_end = entry_begin + dtohl(lib->count); | |
| for (auto entry_iter = entry_begin; entry_iter != entry_end; ++entry_iter) { | |
| std::string package_name; | |
| util::ReadUtf16StringFromDevice(entry_iter->packageName, | |
| arraysize(entry_iter->packageName), &package_name); | |
| if (dtohl(entry_iter->packageId) >= std::numeric_limits<uint8_t>::max()) { | |
| LOG(ERROR) << StringPrintf( | |
| "Package ID %02x in RES_TABLE_LIBRARY_TYPE too large for package '%s'.", | |
| dtohl(entry_iter->packageId), package_name.c_str()); | |
| return {}; | |
| } | |
| loaded_package->dynamic_package_map_.emplace_back(std::move(package_name), | |
| dtohl(entry_iter->packageId)); | |
| } | |
| } break; | |
| case RES_TABLE_OVERLAYABLE_TYPE: { | |
| const ResTable_overlayable_header* header = | |
| child_chunk.header<ResTable_overlayable_header>(); | |
| if (header == nullptr) { | |
| LOG(ERROR) << "RES_TABLE_OVERLAYABLE_TYPE too small."; | |
| return {}; | |
| } | |
| std::string name; | |
| util::ReadUtf16StringFromDevice(header->name, arraysize(header->name), &name); | |
| std::string actor; | |
| util::ReadUtf16StringFromDevice(header->actor, arraysize(header->actor), &actor); | |
| if (loaded_package->overlayable_map_.find(name) != | |
| loaded_package->overlayable_map_.end()) { | |
| LOG(ERROR) << "Multiple <overlayable> blocks with the same name '" << name << "'."; | |
| return {}; | |
| } | |
| loaded_package->overlayable_map_.emplace(name, actor); | |
| // Iterate over the overlayable policy chunks contained within the overlayable chunk data | |
| ChunkIterator overlayable_iter(child_chunk.data_ptr(), child_chunk.data_size()); | |
| while (overlayable_iter.HasNext()) { | |
| const Chunk overlayable_child_chunk = overlayable_iter.Next(); | |
| switch (overlayable_child_chunk.type()) { | |
| case RES_TABLE_OVERLAYABLE_POLICY_TYPE: { | |
| const ResTable_overlayable_policy_header* policy_header = | |
| overlayable_child_chunk.header<ResTable_overlayable_policy_header>(); | |
| if (policy_header == nullptr) { | |
| LOG(ERROR) << "RES_TABLE_OVERLAYABLE_POLICY_TYPE too small."; | |
| return {}; | |
| } | |
| if ((overlayable_child_chunk.data_size() / sizeof(ResTable_ref)) | |
| < dtohl(policy_header->entry_count)) { | |
| LOG(ERROR) << "RES_TABLE_OVERLAYABLE_POLICY_TYPE too small to hold entries."; | |
| return {}; | |
| } | |
| // Retrieve all the resource ids belonging to this policy chunk | |
| std::unordered_set<uint32_t> ids; | |
| const auto ids_begin = | |
| reinterpret_cast<const ResTable_ref*>(overlayable_child_chunk.data_ptr()); | |
| const auto ids_end = ids_begin + dtohl(policy_header->entry_count); | |
| for (auto id_iter = ids_begin; id_iter != ids_end; ++id_iter) { | |
| ids.insert(dtohl(id_iter->ident)); | |
| } | |
| // Add the pairing of overlayable properties and resource ids to the package | |
| OverlayableInfo overlayable_info{}; | |
| overlayable_info.name = name; | |
| overlayable_info.actor = actor; | |
| overlayable_info.policy_flags = policy_header->policy_flags; | |
| loaded_package->overlayable_infos_.push_back(std::make_pair(overlayable_info, ids)); | |
| loaded_package->defines_overlayable_ = true; | |
| break; | |
| } | |
| default: | |
| LOG(WARNING) << StringPrintf("Unknown chunk type '%02x'.", chunk.type()); | |
| break; | |
| } | |
| } | |
| if (overlayable_iter.HadError()) { | |
| LOG(ERROR) << StringPrintf("Error parsing RES_TABLE_OVERLAYABLE_TYPE: %s", | |
| overlayable_iter.GetLastError().c_str()); | |
| if (overlayable_iter.HadFatalError()) { | |
| return {}; | |
| } | |
| } | |
| } break; | |
| default: | |
| LOG(WARNING) << StringPrintf("Unknown chunk type '%02x'.", chunk.type()); | |
| break; | |
| } | |
| } | |
| if (iter.HadError()) { | |
| LOG(ERROR) << iter.GetLastError(); | |
| if (iter.HadFatalError()) { | |
| return {}; | |
| } | |
| } | |
| // Flatten and construct the TypeSpecs. | |
| for (auto& entry : type_builder_map) { | |
| uint8_t type_idx = static_cast<uint8_t>(entry.first); | |
| TypeSpecPtr type_spec_ptr = entry.second->Build(); | |
| if (type_spec_ptr == nullptr) { | |
| LOG(ERROR) << "Too many type configurations, overflow detected."; | |
| return {}; | |
| } | |
| loaded_package->type_specs_.editItemAt(type_idx) = std::move(type_spec_ptr); | |
| } | |
| return std::move(loaded_package); | |
| } | |
| bool LoadedArsc::LoadTable(const Chunk& chunk, const LoadedIdmap* loaded_idmap, | |
| package_property_t property_flags) { | |
| const ResTable_header* header = chunk.header<ResTable_header>(); | |
| if (header == nullptr) { | |
| LOG(ERROR) << "RES_TABLE_TYPE too small."; | |
| return false; | |
| } | |
| if (loaded_idmap != nullptr) { | |
| global_string_pool_ = util::make_unique<OverlayStringPool>(loaded_idmap); | |
| } | |
| const size_t package_count = dtohl(header->packageCount); | |
| size_t packages_seen = 0; | |
| packages_.reserve(package_count); | |
| ChunkIterator iter(chunk.data_ptr(), chunk.data_size()); | |
| while (iter.HasNext()) { | |
| const Chunk child_chunk = iter.Next(); | |
| switch (child_chunk.type()) { | |
| case RES_STRING_POOL_TYPE: | |
| // Only use the first string pool. Ignore others. | |
| if (global_string_pool_->getError() == NO_INIT) { | |
| status_t err = global_string_pool_->setTo(child_chunk.header<ResStringPool_header>(), | |
| child_chunk.size()); | |
| if (err != NO_ERROR) { | |
| LOG(ERROR) << "RES_STRING_POOL_TYPE corrupt."; | |
| return false; | |
| } | |
| } else { | |
| LOG(WARNING) << "Multiple RES_STRING_POOL_TYPEs found in RES_TABLE_TYPE."; | |
| } | |
| break; | |
| case RES_TABLE_PACKAGE_TYPE: { | |
| if (packages_seen + 1 > package_count) { | |
| LOG(ERROR) << "More package chunks were found than the " << package_count | |
| << " declared in the header."; | |
| return false; | |
| } | |
| packages_seen++; | |
| std::unique_ptr<const LoadedPackage> loaded_package = | |
| LoadedPackage::Load(child_chunk, property_flags); | |
| if (!loaded_package) { | |
| return false; | |
| } | |
| packages_.push_back(std::move(loaded_package)); | |
| } break; | |
| default: | |
| LOG(WARNING) << StringPrintf("Unknown chunk type '%02x'.", chunk.type()); | |
| break; | |
| } | |
| } | |
| if (iter.HadError()) { | |
| LOG(ERROR) << iter.GetLastError(); | |
| if (iter.HadFatalError()) { | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| std::unique_ptr<const LoadedArsc> LoadedArsc::Load(const StringPiece& data, | |
| const LoadedIdmap* loaded_idmap, | |
| const package_property_t property_flags) { | |
| ATRACE_NAME("LoadedArsc::Load"); | |
| // Not using make_unique because the constructor is private. | |
| std::unique_ptr<LoadedArsc> loaded_arsc(new LoadedArsc()); | |
| ChunkIterator iter(data.data(), data.size()); | |
| while (iter.HasNext()) { | |
| const Chunk chunk = iter.Next(); | |
| switch (chunk.type()) { | |
| case RES_TABLE_TYPE: | |
| if (!loaded_arsc->LoadTable(chunk, loaded_idmap, property_flags)) { | |
| return {}; | |
| } | |
| break; | |
| default: | |
| LOG(WARNING) << StringPrintf("Unknown chunk type '%02x'.", chunk.type()); | |
| break; | |
| } | |
| } | |
| if (iter.HadError()) { | |
| LOG(ERROR) << iter.GetLastError(); | |
| if (iter.HadFatalError()) { | |
| return {}; | |
| } | |
| } | |
| // Need to force a move for mingw32. | |
| return std::move(loaded_arsc); | |
| } | |
| std::unique_ptr<const LoadedArsc> LoadedArsc::CreateEmpty() { | |
| return std::unique_ptr<LoadedArsc>(new LoadedArsc()); | |
| } | |
| } // namespace android |