/*
* 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,
const IdmapEntry_header* idmap_header)
: header_(header), idmap_header_(idmap_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->idmap_entries = idmap_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_;
const IdmapEntry_header* idmap_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,
const LoadedIdmap* loaded_idmap,
bool system, bool load_as_shared_library) {
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 {};
}
loaded_package->system_ = system;
loaded_package->package_id_ = dtohl(header->id);
if (loaded_package->package_id_ == 0 ||
(loaded_package->package_id_ == kAppPackageId && load_as_shared_library)) {
// Package ID of 0 means this is a shared library.
loaded_package->dynamic_ = true;
}
if (loaded_idmap != nullptr) {
// This is an overlay and so it needs to pretend to be the target package.
loaded_package->package_id_ = loaded_idmap->TargetPackageId();
loaded_package->overlay_ = true;
}
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 {};
}
// If this is an overlay, associate the mapping of this type to the target type
// from the IDMAP.
const IdmapEntry_header* idmap_entry_header = nullptr;
if (loaded_idmap != nullptr) {
idmap_entry_header = loaded_idmap->GetEntryMapForType(type_spec->id);
}
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, idmap_entry_header);
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 {};
}
// We only add the type to the package if there is no IDMAP, or if the type is
// overlaying something.
if (loaded_idmap == nullptr || type_spec_ptr->idmap_entries != nullptr) {
// If this is an overlay, insert it at the target type ID.
if (type_spec_ptr->idmap_entries != nullptr) {
type_idx = dtohs(type_spec_ptr->idmap_entries->target_type_id) - 1;
}
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,
bool load_as_shared_library) {
const ResTable_header* header = chunk.header<ResTable_header>();
if (header == nullptr) {
LOG(ERROR) << "RES_TABLE_TYPE too small.";
return false;
}
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, loaded_idmap, system_, load_as_shared_library);
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, bool system,
bool load_as_shared_library) {
ATRACE_NAME("LoadedArsc::LoadTable");
// Not using make_unique because the constructor is private.
std::unique_ptr<LoadedArsc> loaded_arsc(new LoadedArsc());
loaded_arsc->system_ = system;
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, load_as_shared_library)) {
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