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/*
* 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.
*/
#include "art_dex_file_loader.h"
#include <sys/stat.h>
#include <memory>
#include "android-base/stringprintf.h"
#include "base/file_magic.h"
#include "base/file_utils.h"
#include "base/logging.h"
#include "base/mem_map.h"
#include "base/mman.h" // For the PROT_* and MAP_* constants.
#include "base/stl_util.h"
#include "base/systrace.h"
#include "base/unix_file/fd_file.h"
#include "base/zip_archive.h"
#include "dex/compact_dex_file.h"
#include "dex/dex_file.h"
#include "dex/dex_file_verifier.h"
#include "dex/standard_dex_file.h"
namespace art {
using android::base::StringPrintf;
bool ArtDexFileLoader::GetMultiDexChecksums(const char* filename,
std::vector<uint32_t>* checksums,
std::vector<std::string>* dex_locations,
std::string* error_msg,
int zip_fd,
bool* zip_file_only_contains_uncompressed_dex) {
CHECK(checksums != nullptr);
uint32_t magic;
File fd;
if (zip_fd != -1) {
if (ReadMagicAndReset(zip_fd, &magic, error_msg)) {
fd = File(DupCloexec(zip_fd), /* check_usage= */ false);
}
} else {
fd = OpenAndReadMagic(filename, &magic, error_msg);
}
if (fd.Fd() == -1) {
DCHECK(!error_msg->empty());
return false;
}
if (IsZipMagic(magic)) {
std::unique_ptr<ZipArchive> zip_archive(
ZipArchive::OpenFromFd(fd.Release(), filename, error_msg));
if (zip_archive.get() == nullptr) {
*error_msg = StringPrintf("Failed to open zip archive '%s' (error msg: %s)", filename,
error_msg->c_str());
return false;
}
if (zip_file_only_contains_uncompressed_dex != nullptr) {
// Start by assuming everything is uncompressed.
*zip_file_only_contains_uncompressed_dex = true;
}
uint32_t idx = 0;
std::string zip_entry_name = GetMultiDexClassesDexName(idx);
std::unique_ptr<ZipEntry> zip_entry(zip_archive->Find(zip_entry_name.c_str(), error_msg));
if (zip_entry.get() == nullptr) {
// A zip file with no dex code should be accepted. It's likely a config split APK, which we
// are currently passing from higher levels.
VLOG(dex) << StringPrintf("Zip archive '%s' doesn't contain %s (error msg: %s)",
filename,
zip_entry_name.c_str(),
error_msg->c_str());
return true;
}
do {
if (zip_file_only_contains_uncompressed_dex != nullptr) {
if (!(zip_entry->IsUncompressed() && zip_entry->IsAlignedTo(alignof(DexFile::Header)))) {
*zip_file_only_contains_uncompressed_dex = false;
}
}
checksums->push_back(zip_entry->GetCrc32());
dex_locations->push_back(GetMultiDexLocation(idx, filename));
zip_entry_name = GetMultiDexClassesDexName(++idx);
zip_entry.reset(zip_archive->Find(zip_entry_name.c_str(), error_msg));
} while (zip_entry.get() != nullptr);
return true;
}
if (IsMagicValid(magic)) {
ArtDexFileLoader loader(fd.Release(), filename);
std::vector<std::unique_ptr<const DexFile>> dex_files;
if (!loader.Open(/* verify= */ false,
/* verify_checksum= */ false,
error_msg,
&dex_files)) {
return false;
}
for (auto& dex_file : dex_files) {
checksums->push_back(dex_file->GetHeader().checksum_);
dex_locations->push_back(dex_file->GetLocation());
}
return true;
}
*error_msg = StringPrintf("Expected valid zip or dex file: '%s'", filename);
return false;
}
std::unique_ptr<const DexFile> ArtDexFileLoader::Open(
const uint8_t* base,
size_t size,
const std::string& location,
uint32_t location_checksum,
const OatDexFile* oat_dex_file,
bool verify,
bool verify_checksum,
std::string* error_msg,
std::unique_ptr<DexFileContainer> container) const {
return OpenCommon(base,
size,
/*data_base=*/nullptr,
/*data_size=*/0,
location,
location_checksum,
oat_dex_file,
verify,
verify_checksum,
error_msg,
std::move(container),
/*verify_result=*/nullptr);
}
std::unique_ptr<const DexFile> ArtDexFileLoader::Open(const std::string& location,
uint32_t location_checksum,
MemMap&& mem_map,
bool verify,
bool verify_checksum,
std::string* error_msg) const {
ArtDexFileLoader loader(std::move(mem_map), location);
return loader.Open(location_checksum, verify, verify_checksum, error_msg);
}
bool ArtDexFileLoader::Open(const char* filename,
const std::string& location,
bool verify,
bool verify_checksum,
std::string* error_msg,
std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
ArtDexFileLoader loader(filename, location);
return loader.Open(verify, verify_checksum, error_msg, dex_files);
}
} // namespace art
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