| /* |
| * Copyright (C) 2014 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 "oat_file_assistant.h" |
| |
| #include <sstream> |
| |
| #include <sys/stat.h> |
| |
| #include "android-base/stringprintf.h" |
| #include "android-base/strings.h" |
| |
| #include "base/file_utils.h" |
| #include "base/logging.h" // For VLOG. |
| #include "base/macros.h" |
| #include "base/os.h" |
| #include "base/stl_util.h" |
| #include "base/utils.h" |
| #include "class_linker.h" |
| #include "compiler_filter.h" |
| #include "dex/art_dex_file_loader.h" |
| #include "dex/dex_file_loader.h" |
| #include "exec_utils.h" |
| #include "gc/heap.h" |
| #include "gc/space/image_space.h" |
| #include "image.h" |
| #include "oat.h" |
| #include "runtime.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "vdex_file.h" |
| #include "class_loader_context.h" |
| |
| namespace art { |
| |
| using android::base::StringPrintf; |
| |
| std::ostream& operator << (std::ostream& stream, const OatFileAssistant::OatStatus status) { |
| switch (status) { |
| case OatFileAssistant::kOatCannotOpen: |
| stream << "kOatCannotOpen"; |
| break; |
| case OatFileAssistant::kOatDexOutOfDate: |
| stream << "kOatDexOutOfDate"; |
| break; |
| case OatFileAssistant::kOatBootImageOutOfDate: |
| stream << "kOatBootImageOutOfDate"; |
| break; |
| case OatFileAssistant::kOatUpToDate: |
| stream << "kOatUpToDate"; |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| |
| return stream; |
| } |
| |
| OatFileAssistant::OatFileAssistant(const char* dex_location, |
| const InstructionSet isa, |
| bool load_executable, |
| bool only_load_system_executable) |
| : OatFileAssistant(dex_location, |
| isa, |
| load_executable, |
| only_load_system_executable, |
| /*vdex_fd=*/ -1, |
| /*oat_fd=*/ -1, |
| /*zip_fd=*/ -1) {} |
| |
| |
| OatFileAssistant::OatFileAssistant(const char* dex_location, |
| const InstructionSet isa, |
| bool load_executable, |
| bool only_load_system_executable, |
| int vdex_fd, |
| int oat_fd, |
| int zip_fd) |
| : isa_(isa), |
| load_executable_(load_executable), |
| only_load_system_executable_(only_load_system_executable), |
| odex_(this, /*is_oat_location=*/ false), |
| oat_(this, /*is_oat_location=*/ true), |
| zip_fd_(zip_fd) { |
| CHECK(dex_location != nullptr) << "OatFileAssistant: null dex location"; |
| |
| if (zip_fd < 0) { |
| CHECK_LE(oat_fd, 0) << "zip_fd must be provided with valid oat_fd. zip_fd=" << zip_fd |
| << " oat_fd=" << oat_fd; |
| CHECK_LE(vdex_fd, 0) << "zip_fd must be provided with valid vdex_fd. zip_fd=" << zip_fd |
| << " vdex_fd=" << vdex_fd;; |
| } |
| |
| dex_location_.assign(dex_location); |
| |
| if (load_executable_ && isa != kRuntimeISA) { |
| LOG(WARNING) << "OatFileAssistant: Load executable specified, " |
| << "but isa is not kRuntimeISA. Will not attempt to load executable."; |
| load_executable_ = false; |
| } |
| |
| // Get the odex filename. |
| std::string error_msg; |
| std::string odex_file_name; |
| if (DexLocationToOdexFilename(dex_location_, isa_, &odex_file_name, &error_msg)) { |
| odex_.Reset(odex_file_name, UseFdToReadFiles(), zip_fd, vdex_fd, oat_fd); |
| } else { |
| LOG(WARNING) << "Failed to determine odex file name: " << error_msg; |
| } |
| |
| if (!UseFdToReadFiles()) { |
| // Get the oat filename. |
| std::string oat_file_name; |
| if (DexLocationToOatFilename(dex_location_, isa_, &oat_file_name, &error_msg)) { |
| oat_.Reset(oat_file_name, /*use_fd=*/ false); |
| } else { |
| LOG(WARNING) << "Failed to determine oat file name for dex location " |
| << dex_location_ << ": " << error_msg; |
| } |
| } |
| |
| // Check if the dex directory is writable. |
| // This will be needed in most uses of OatFileAssistant and so it's OK to |
| // compute it eagerly. (the only use which will not make use of it is |
| // OatFileAssistant::GetStatusDump()) |
| size_t pos = dex_location_.rfind('/'); |
| if (pos == std::string::npos) { |
| LOG(WARNING) << "Failed to determine dex file parent directory: " << dex_location_; |
| } else if (!UseFdToReadFiles()) { |
| // We cannot test for parent access when using file descriptors. That's ok |
| // because in this case we will always pick the odex file anyway. |
| std::string parent = dex_location_.substr(0, pos); |
| if (access(parent.c_str(), W_OK) == 0) { |
| dex_parent_writable_ = true; |
| } else { |
| VLOG(oat) << "Dex parent of " << dex_location_ << " is not writable: " << strerror(errno); |
| } |
| } |
| } |
| |
| OatFileAssistant::~OatFileAssistant() { |
| // Clean up the lock file. |
| if (flock_.get() != nullptr) { |
| unlink(flock_->GetPath().c_str()); |
| } |
| } |
| |
| bool OatFileAssistant::UseFdToReadFiles() { |
| return zip_fd_ >= 0; |
| } |
| |
| bool OatFileAssistant::IsInBootClassPath() { |
| // Note: We check the current boot class path, regardless of the ISA |
| // specified by the user. This is okay, because the boot class path should |
| // be the same for all ISAs. |
| // TODO: Can we verify the boot class path is the same for all ISAs? |
| Runtime* runtime = Runtime::Current(); |
| ClassLinker* class_linker = runtime->GetClassLinker(); |
| const auto& boot_class_path = class_linker->GetBootClassPath(); |
| for (size_t i = 0; i < boot_class_path.size(); i++) { |
| if (boot_class_path[i]->GetLocation() == dex_location_) { |
| VLOG(oat) << "Dex location " << dex_location_ << " is in boot class path"; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| int OatFileAssistant::GetDexOptNeeded(CompilerFilter::Filter target, |
| bool profile_changed, |
| bool downgrade, |
| ClassLoaderContext* class_loader_context) { |
| OatFileInfo& info = GetBestInfo(); |
| DexOptNeeded dexopt_needed = info.GetDexOptNeeded(target, |
| profile_changed, |
| downgrade, |
| class_loader_context); |
| if (info.IsOatLocation() || dexopt_needed == kDex2OatFromScratch) { |
| return dexopt_needed; |
| } |
| return -dexopt_needed; |
| } |
| |
| bool OatFileAssistant::IsUpToDate() { |
| return GetBestInfo().Status() == kOatUpToDate; |
| } |
| |
| std::unique_ptr<OatFile> OatFileAssistant::GetBestOatFile() { |
| return GetBestInfo().ReleaseFileForUse(); |
| } |
| |
| std::string OatFileAssistant::GetStatusDump() { |
| std::ostringstream status; |
| bool oat_file_exists = false; |
| bool odex_file_exists = false; |
| if (oat_.Status() != kOatCannotOpen) { |
| // If we can open the file, Filename should not return null. |
| CHECK(oat_.Filename() != nullptr); |
| |
| oat_file_exists = true; |
| status << *oat_.Filename() << "[status=" << oat_.Status() << ", "; |
| const OatFile* file = oat_.GetFile(); |
| if (file == nullptr) { |
| // If the file is null even though the status is not kOatCannotOpen, it |
| // means we must have a vdex file with no corresponding oat file. In |
| // this case we cannot determine the compilation filter. Indicate that |
| // we have only the vdex file instead. |
| status << "vdex-only"; |
| } else { |
| status << "compilation_filter=" << CompilerFilter::NameOfFilter(file->GetCompilerFilter()); |
| } |
| } |
| |
| if (odex_.Status() != kOatCannotOpen) { |
| // If we can open the file, Filename should not return null. |
| CHECK(odex_.Filename() != nullptr); |
| |
| odex_file_exists = true; |
| if (oat_file_exists) { |
| status << "] "; |
| } |
| status << *odex_.Filename() << "[status=" << odex_.Status() << ", "; |
| const OatFile* file = odex_.GetFile(); |
| if (file == nullptr) { |
| status << "vdex-only"; |
| } else { |
| status << "compilation_filter=" << CompilerFilter::NameOfFilter(file->GetCompilerFilter()); |
| } |
| } |
| |
| if (!oat_file_exists && !odex_file_exists) { |
| status << "invalid["; |
| } |
| |
| status << "]"; |
| return status.str(); |
| } |
| |
| std::vector<std::unique_ptr<const DexFile>> OatFileAssistant::LoadDexFiles( |
| const OatFile &oat_file, const char *dex_location) { |
| std::vector<std::unique_ptr<const DexFile>> dex_files; |
| if (LoadDexFiles(oat_file, dex_location, &dex_files)) { |
| return dex_files; |
| } else { |
| return std::vector<std::unique_ptr<const DexFile>>(); |
| } |
| } |
| |
| bool OatFileAssistant::LoadDexFiles( |
| const OatFile &oat_file, |
| const std::string& dex_location, |
| std::vector<std::unique_ptr<const DexFile>>* out_dex_files) { |
| // Load the main dex file. |
| std::string error_msg; |
| const OatDexFile* oat_dex_file = oat_file.GetOatDexFile( |
| dex_location.c_str(), nullptr, &error_msg); |
| if (oat_dex_file == nullptr) { |
| LOG(WARNING) << error_msg; |
| return false; |
| } |
| |
| std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error_msg); |
| if (dex_file.get() == nullptr) { |
| LOG(WARNING) << "Failed to open dex file from oat dex file: " << error_msg; |
| return false; |
| } |
| out_dex_files->push_back(std::move(dex_file)); |
| |
| // Load the rest of the multidex entries |
| for (size_t i = 1;; i++) { |
| std::string multidex_dex_location = DexFileLoader::GetMultiDexLocation(i, dex_location.c_str()); |
| oat_dex_file = oat_file.GetOatDexFile(multidex_dex_location.c_str(), nullptr); |
| if (oat_dex_file == nullptr) { |
| // There are no more multidex entries to load. |
| break; |
| } |
| |
| dex_file = oat_dex_file->OpenDexFile(&error_msg); |
| if (dex_file.get() == nullptr) { |
| LOG(WARNING) << "Failed to open dex file from oat dex file: " << error_msg; |
| return false; |
| } |
| out_dex_files->push_back(std::move(dex_file)); |
| } |
| return true; |
| } |
| |
| bool OatFileAssistant::HasOriginalDexFiles() { |
| // Ensure GetRequiredDexChecksums has been run so that |
| // has_original_dex_files_ is initialized. We don't care about the result of |
| // GetRequiredDexChecksums. |
| GetRequiredDexChecksums(); |
| return has_original_dex_files_; |
| } |
| |
| OatFileAssistant::OatStatus OatFileAssistant::OdexFileStatus() { |
| return odex_.Status(); |
| } |
| |
| OatFileAssistant::OatStatus OatFileAssistant::OatFileStatus() { |
| return oat_.Status(); |
| } |
| |
| bool OatFileAssistant::DexChecksumUpToDate(const VdexFile& file, std::string* error_msg) { |
| const std::vector<uint32_t>* required_dex_checksums = GetRequiredDexChecksums(); |
| if (required_dex_checksums == nullptr) { |
| LOG(WARNING) << "Required dex checksums not found. Assuming dex checksums are up to date."; |
| return true; |
| } |
| |
| uint32_t number_of_dex_files = file.GetVerifierDepsHeader().GetNumberOfDexFiles(); |
| if (required_dex_checksums->size() != number_of_dex_files) { |
| *error_msg = StringPrintf("expected %zu dex files but found %u", |
| required_dex_checksums->size(), |
| number_of_dex_files); |
| return false; |
| } |
| |
| for (uint32_t i = 0; i < number_of_dex_files; i++) { |
| uint32_t expected_checksum = (*required_dex_checksums)[i]; |
| uint32_t actual_checksum = file.GetLocationChecksum(i); |
| if (expected_checksum != actual_checksum) { |
| std::string dex = DexFileLoader::GetMultiDexLocation(i, dex_location_.c_str()); |
| *error_msg = StringPrintf("Dex checksum does not match for dex: %s." |
| "Expected: %u, actual: %u", |
| dex.c_str(), |
| expected_checksum, |
| actual_checksum); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool OatFileAssistant::DexChecksumUpToDate(const OatFile& file, std::string* error_msg) { |
| const std::vector<uint32_t>* required_dex_checksums = GetRequiredDexChecksums(); |
| if (required_dex_checksums == nullptr) { |
| LOG(WARNING) << "Required dex checksums not found. Assuming dex checksums are up to date."; |
| return true; |
| } |
| |
| uint32_t number_of_dex_files = file.GetOatHeader().GetDexFileCount(); |
| if (required_dex_checksums->size() != number_of_dex_files) { |
| *error_msg = StringPrintf("expected %zu dex files but found %u", |
| required_dex_checksums->size(), |
| number_of_dex_files); |
| return false; |
| } |
| |
| for (uint32_t i = 0; i < number_of_dex_files; i++) { |
| std::string dex = DexFileLoader::GetMultiDexLocation(i, dex_location_.c_str()); |
| uint32_t expected_checksum = (*required_dex_checksums)[i]; |
| const OatDexFile* oat_dex_file = file.GetOatDexFile(dex.c_str(), nullptr); |
| if (oat_dex_file == nullptr) { |
| *error_msg = StringPrintf("failed to find %s in %s", dex.c_str(), file.GetLocation().c_str()); |
| return false; |
| } |
| uint32_t actual_checksum = oat_dex_file->GetDexFileLocationChecksum(); |
| if (expected_checksum != actual_checksum) { |
| VLOG(oat) << "Dex checksum does not match for dex: " << dex |
| << ". Expected: " << expected_checksum |
| << ", Actual: " << actual_checksum; |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| OatFileAssistant::OatStatus OatFileAssistant::GivenOatFileStatus(const OatFile& file) { |
| // Verify the ART_USE_READ_BARRIER state. |
| // TODO: Don't fully reject files due to read barrier state. If they contain |
| // compiled code and are otherwise okay, we should return something like |
| // kOatRelocationOutOfDate. If they don't contain compiled code, the read |
| // barrier state doesn't matter. |
| const bool is_cc = file.GetOatHeader().IsConcurrentCopying(); |
| constexpr bool kRuntimeIsCC = kUseReadBarrier; |
| if (is_cc != kRuntimeIsCC) { |
| return kOatCannotOpen; |
| } |
| |
| // Verify the dex checksum. |
| std::string error_msg; |
| VdexFile* vdex = file.GetVdexFile(); |
| if (!DexChecksumUpToDate(*vdex, &error_msg)) { |
| LOG(ERROR) << error_msg; |
| return kOatDexOutOfDate; |
| } |
| |
| CompilerFilter::Filter current_compiler_filter = file.GetCompilerFilter(); |
| |
| // Verify the image checksum |
| if (CompilerFilter::DependsOnImageChecksum(current_compiler_filter)) { |
| const ImageInfo* image_info = GetImageInfo(); |
| if (image_info == nullptr) { |
| VLOG(oat) << "No image for oat image checksum to match against."; |
| |
| if (HasOriginalDexFiles()) { |
| return kOatBootImageOutOfDate; |
| } |
| |
| // If there is no original dex file to fall back to, grudgingly accept |
| // the oat file. This could technically lead to crashes, but there's no |
| // way we could find a better oat file to use for this dex location, |
| // and it's better than being stuck in a boot loop with no way out. |
| // The problem will hopefully resolve itself the next time the runtime |
| // starts up. |
| LOG(WARNING) << "Dex location " << dex_location_ << " does not seem to include dex file. " |
| << "Allow oat file use. This is potentially dangerous."; |
| } else if (!image_info->ValidateBootClassPathChecksums(file)) { |
| VLOG(oat) << "Oat image checksum does not match image checksum."; |
| return kOatBootImageOutOfDate; |
| } |
| } else { |
| VLOG(oat) << "Image checksum test skipped for compiler filter " << current_compiler_filter; |
| } |
| |
| // zip_file_only_contains_uncompressed_dex_ is only set during fetching the dex checksums. |
| DCHECK(required_dex_checksums_attempted_); |
| if (only_load_system_executable_ && |
| !LocationIsOnSystem(file.GetLocation().c_str()) && |
| file.ContainsDexCode() && |
| zip_file_only_contains_uncompressed_dex_) { |
| LOG(ERROR) << "Not loading " |
| << dex_location_ |
| << ": oat file has dex code, but APK has uncompressed dex code"; |
| return kOatDexOutOfDate; |
| } |
| |
| return kOatUpToDate; |
| } |
| |
| static bool DexLocationToOdexNames(const std::string& location, |
| InstructionSet isa, |
| std::string* odex_filename, |
| std::string* oat_dir, |
| std::string* isa_dir, |
| std::string* error_msg) { |
| CHECK(odex_filename != nullptr); |
| CHECK(error_msg != nullptr); |
| |
| // The odex file name is formed by replacing the dex_location extension with |
| // .odex and inserting an oat/<isa> directory. For example: |
| // location = /foo/bar/baz.jar |
| // odex_location = /foo/bar/oat/<isa>/baz.odex |
| |
| // Find the directory portion of the dex location and add the oat/<isa> |
| // directory. |
| size_t pos = location.rfind('/'); |
| if (pos == std::string::npos) { |
| *error_msg = "Dex location " + location + " has no directory."; |
| return false; |
| } |
| std::string dir = location.substr(0, pos+1); |
| // Add the oat directory. |
| dir += "oat"; |
| if (oat_dir != nullptr) { |
| *oat_dir = dir; |
| } |
| // Add the isa directory |
| dir += "/" + std::string(GetInstructionSetString(isa)); |
| if (isa_dir != nullptr) { |
| *isa_dir = dir; |
| } |
| |
| // Get the base part of the file without the extension. |
| std::string file = location.substr(pos+1); |
| pos = file.rfind('.'); |
| if (pos == std::string::npos) { |
| *error_msg = "Dex location " + location + " has no extension."; |
| return false; |
| } |
| std::string base = file.substr(0, pos); |
| |
| *odex_filename = dir + "/" + base + ".odex"; |
| return true; |
| } |
| |
| bool OatFileAssistant::DexLocationToOdexFilename(const std::string& location, |
| InstructionSet isa, |
| std::string* odex_filename, |
| std::string* error_msg) { |
| return DexLocationToOdexNames(location, isa, odex_filename, nullptr, nullptr, error_msg); |
| } |
| |
| bool OatFileAssistant::DexLocationToOatFilename(const std::string& location, |
| InstructionSet isa, |
| std::string* oat_filename, |
| std::string* error_msg) { |
| CHECK(oat_filename != nullptr); |
| CHECK(error_msg != nullptr); |
| |
| // If ANDROID_DATA is not set, return false instead of aborting. |
| // This can occur for preopt when using a class loader context. |
| if (GetAndroidDataSafe(error_msg) == nullptr) { |
| *error_msg = "GetAndroidDataSafe failed: " + *error_msg; |
| return false; |
| } |
| |
| std::string cache_dir = GetDalvikCache(GetInstructionSetString(isa)); |
| if (cache_dir.empty()) { |
| *error_msg = "Dalvik cache directory does not exist"; |
| return false; |
| } |
| |
| // TODO: The oat file assistant should be the definitive place for |
| // determining the oat file name from the dex location, not |
| // GetDalvikCacheFilename. |
| return GetDalvikCacheFilename(location.c_str(), cache_dir.c_str(), oat_filename, error_msg); |
| } |
| |
| const std::vector<uint32_t>* OatFileAssistant::GetRequiredDexChecksums() { |
| if (!required_dex_checksums_attempted_) { |
| required_dex_checksums_attempted_ = true; |
| required_dex_checksums_found_ = false; |
| cached_required_dex_checksums_.clear(); |
| std::string error_msg; |
| const ArtDexFileLoader dex_file_loader; |
| if (dex_file_loader.GetMultiDexChecksums(dex_location_.c_str(), |
| &cached_required_dex_checksums_, |
| &error_msg, |
| zip_fd_, |
| &zip_file_only_contains_uncompressed_dex_)) { |
| required_dex_checksums_found_ = true; |
| has_original_dex_files_ = true; |
| } else { |
| // This can happen if the original dex file has been stripped from the |
| // apk. |
| VLOG(oat) << "OatFileAssistant: " << error_msg; |
| has_original_dex_files_ = false; |
| |
| // Get the checksums from the odex if we can. |
| const OatFile* odex_file = odex_.GetFile(); |
| if (odex_file != nullptr) { |
| required_dex_checksums_found_ = true; |
| for (size_t i = 0; i < odex_file->GetOatHeader().GetDexFileCount(); i++) { |
| std::string dex = DexFileLoader::GetMultiDexLocation(i, dex_location_.c_str()); |
| const OatDexFile* odex_dex_file = odex_file->GetOatDexFile(dex.c_str(), nullptr); |
| if (odex_dex_file == nullptr) { |
| required_dex_checksums_found_ = false; |
| break; |
| } |
| cached_required_dex_checksums_.push_back(odex_dex_file->GetDexFileLocationChecksum()); |
| } |
| } |
| } |
| } |
| return required_dex_checksums_found_ ? &cached_required_dex_checksums_ : nullptr; |
| } |
| |
| bool OatFileAssistant::ImageInfo::ValidateBootClassPathChecksums(const OatFile& oat_file) const { |
| const char* oat_boot_class_path_checksums = |
| oat_file.GetOatHeader().GetStoreValueByKey(OatHeader::kBootClassPathChecksumsKey); |
| if (oat_boot_class_path_checksums == nullptr) { |
| return false; |
| } |
| // The checksums can be either the same or a prefix of the expected checksums, |
| // ending before the ':' delimiter. |
| size_t length = strlen(oat_boot_class_path_checksums); |
| if (length > boot_class_path_checksums.length() || |
| (length < boot_class_path_checksums.length() && boot_class_path_checksums[length] != ':')) { |
| return false; |
| } |
| return boot_class_path_checksums.compare(0u, length, oat_boot_class_path_checksums) == 0; |
| } |
| |
| std::unique_ptr<OatFileAssistant::ImageInfo> |
| OatFileAssistant::ImageInfo::GetRuntimeImageInfo(InstructionSet isa, std::string* error_msg) { |
| CHECK(error_msg != nullptr); |
| |
| Runtime* runtime = Runtime::Current(); |
| std::unique_ptr<ImageInfo> info(new ImageInfo()); |
| info->location = runtime->GetImageLocation(); |
| info->boot_class_path_checksums = gc::space::ImageSpace::GetBootClassPathChecksums( |
| runtime->GetBootClassPath(), info->location, isa, error_msg); |
| if (info->boot_class_path_checksums.empty()) { |
| return nullptr; |
| } |
| return info; |
| } |
| |
| const OatFileAssistant::ImageInfo* OatFileAssistant::GetImageInfo() { |
| if (!image_info_load_attempted_) { |
| image_info_load_attempted_ = true; |
| std::string error_msg; |
| cached_image_info_ = ImageInfo::GetRuntimeImageInfo(isa_, &error_msg); |
| if (cached_image_info_ == nullptr) { |
| LOG(WARNING) << "Unable to get runtime image info: " << error_msg; |
| } |
| } |
| return cached_image_info_.get(); |
| } |
| |
| OatFileAssistant::OatFileInfo& OatFileAssistant::GetBestInfo() { |
| // TODO(calin): Document the side effects of class loading when |
| // running dalvikvm command line. |
| if (dex_parent_writable_ || UseFdToReadFiles()) { |
| // If the parent of the dex file is writable it means that we can |
| // create the odex file. In this case we unconditionally pick the odex |
| // as the best oat file. This corresponds to the regular use case when |
| // apps gets installed or when they load private, secondary dex file. |
| // For apps on the system partition the odex location will not be |
| // writable and thus the oat location might be more up to date. |
| return odex_; |
| } |
| |
| // We cannot write to the odex location. This must be a system app. |
| |
| // If the oat location is usable take it. |
| if (oat_.IsUseable()) { |
| return oat_; |
| } |
| |
| // The oat file is not usable but the odex file might be up to date. |
| // This is an indication that we are dealing with an up to date prebuilt |
| // (that doesn't need relocation). |
| if (odex_.Status() == kOatUpToDate) { |
| return odex_; |
| } |
| |
| // The oat file is not usable and the odex file is not up to date. |
| // However we have access to the original dex file which means we can make |
| // the oat location up to date. |
| if (HasOriginalDexFiles()) { |
| return oat_; |
| } |
| |
| // We got into the worst situation here: |
| // - the oat location is not usable |
| // - the prebuild odex location is not up to date |
| // - and we don't have the original dex file anymore (stripped). |
| // Pick the odex if it exists, or the oat if not. |
| return (odex_.Status() == kOatCannotOpen) ? oat_ : odex_; |
| } |
| |
| std::unique_ptr<gc::space::ImageSpace> OatFileAssistant::OpenImageSpace(const OatFile* oat_file) { |
| DCHECK(oat_file != nullptr); |
| std::string art_file = ReplaceFileExtension(oat_file->GetLocation(), "art"); |
| if (art_file.empty()) { |
| return nullptr; |
| } |
| std::string error_msg; |
| ScopedObjectAccess soa(Thread::Current()); |
| std::unique_ptr<gc::space::ImageSpace> ret = |
| gc::space::ImageSpace::CreateFromAppImage(art_file.c_str(), oat_file, &error_msg); |
| if (ret == nullptr && (VLOG_IS_ON(image) || OS::FileExists(art_file.c_str()))) { |
| LOG(INFO) << "Failed to open app image " << art_file.c_str() << " " << error_msg; |
| } |
| return ret; |
| } |
| |
| OatFileAssistant::OatFileInfo::OatFileInfo(OatFileAssistant* oat_file_assistant, |
| bool is_oat_location) |
| : oat_file_assistant_(oat_file_assistant), is_oat_location_(is_oat_location) |
| {} |
| |
| bool OatFileAssistant::OatFileInfo::IsOatLocation() { |
| return is_oat_location_; |
| } |
| |
| const std::string* OatFileAssistant::OatFileInfo::Filename() { |
| return filename_provided_ ? &filename_ : nullptr; |
| } |
| |
| bool OatFileAssistant::OatFileInfo::IsUseable() { |
| switch (Status()) { |
| case kOatCannotOpen: |
| case kOatDexOutOfDate: |
| case kOatBootImageOutOfDate: return false; |
| |
| case kOatUpToDate: return true; |
| } |
| UNREACHABLE(); |
| } |
| |
| OatFileAssistant::OatStatus OatFileAssistant::OatFileInfo::Status() { |
| if (!status_attempted_) { |
| status_attempted_ = true; |
| const OatFile* file = GetFile(); |
| if (file == nullptr) { |
| // Check to see if there is a vdex file we can make use of. |
| std::string error_msg; |
| std::string vdex_filename = GetVdexFilename(filename_); |
| std::unique_ptr<VdexFile> vdex; |
| if (use_fd_) { |
| if (vdex_fd_ >= 0) { |
| struct stat s; |
| int rc = TEMP_FAILURE_RETRY(fstat(vdex_fd_, &s)); |
| if (rc == -1) { |
| error_msg = StringPrintf("Failed getting length of the vdex file %s.", strerror(errno)); |
| } else { |
| vdex = VdexFile::Open(vdex_fd_, |
| s.st_size, |
| vdex_filename, |
| /*writable=*/ false, |
| /*low_4gb=*/ false, |
| /*unquicken=*/ false, |
| &error_msg); |
| } |
| } |
| } else { |
| vdex = VdexFile::Open(vdex_filename, |
| /*writable=*/ false, |
| /*low_4gb=*/ false, |
| /*unquicken=*/ false, |
| &error_msg); |
| } |
| if (vdex == nullptr) { |
| status_ = kOatCannotOpen; |
| VLOG(oat) << "unable to open vdex file " << vdex_filename << ": " << error_msg; |
| } else { |
| if (oat_file_assistant_->DexChecksumUpToDate(*vdex, &error_msg)) { |
| // The vdex file does not contain enough information to determine |
| // whether it is up to date with respect to the boot image, so we |
| // assume it is out of date. |
| VLOG(oat) << error_msg; |
| status_ = kOatBootImageOutOfDate; |
| } else { |
| status_ = kOatDexOutOfDate; |
| } |
| } |
| } else { |
| status_ = oat_file_assistant_->GivenOatFileStatus(*file); |
| VLOG(oat) << file->GetLocation() << " is " << status_ |
| << " with filter " << file->GetCompilerFilter(); |
| } |
| } |
| return status_; |
| } |
| |
| OatFileAssistant::DexOptNeeded OatFileAssistant::OatFileInfo::GetDexOptNeeded( |
| CompilerFilter::Filter target, |
| bool profile_changed, |
| bool downgrade, |
| ClassLoaderContext* context) { |
| |
| bool filter_okay = CompilerFilterIsOkay(target, profile_changed, downgrade); |
| bool class_loader_context_okay = ClassLoaderContextIsOkay(context); |
| |
| // Only check the filter and relocation if the class loader context is ok. |
| // If it is not, we will return kDex2OatFromScratch as the compilation needs to be redone. |
| if (class_loader_context_okay) { |
| if (filter_okay && Status() == kOatUpToDate) { |
| // The oat file is in good shape as is. |
| return kNoDexOptNeeded; |
| } |
| |
| if (IsUseable()) { |
| return kDex2OatForFilter; |
| } |
| |
| if (Status() == kOatBootImageOutOfDate) { |
| return kDex2OatForBootImage; |
| } |
| } |
| |
| if (oat_file_assistant_->HasOriginalDexFiles()) { |
| return kDex2OatFromScratch; |
| } else { |
| // Otherwise there is nothing we can do, even if we want to. |
| return kNoDexOptNeeded; |
| } |
| } |
| |
| const OatFile* OatFileAssistant::OatFileInfo::GetFile() { |
| CHECK(!file_released_) << "GetFile called after oat file released."; |
| if (!load_attempted_) { |
| load_attempted_ = true; |
| if (filename_provided_) { |
| bool executable = oat_file_assistant_->load_executable_; |
| if (executable && oat_file_assistant_->only_load_system_executable_) { |
| executable = LocationIsOnSystem(filename_.c_str()); |
| } |
| std::string error_msg; |
| if (use_fd_) { |
| if (oat_fd_ >= 0 && vdex_fd_ >= 0) { |
| file_.reset(OatFile::Open(zip_fd_, |
| vdex_fd_, |
| oat_fd_, |
| filename_.c_str(), |
| executable, |
| /*low_4gb=*/ false, |
| oat_file_assistant_->dex_location_.c_str(), |
| /*reservation=*/ nullptr, |
| &error_msg)); |
| } |
| } else { |
| file_.reset(OatFile::Open(/*zip_fd=*/ -1, |
| filename_.c_str(), |
| filename_.c_str(), |
| executable, |
| /*low_4gb=*/ false, |
| oat_file_assistant_->dex_location_.c_str(), |
| /*reservation=*/ nullptr, |
| &error_msg)); |
| } |
| if (file_.get() == nullptr) { |
| VLOG(oat) << "OatFileAssistant test for existing oat file " |
| << filename_ << ": " << error_msg; |
| } |
| } |
| } |
| return file_.get(); |
| } |
| |
| bool OatFileAssistant::OatFileInfo::CompilerFilterIsOkay( |
| CompilerFilter::Filter target, bool profile_changed, bool downgrade) { |
| const OatFile* file = GetFile(); |
| if (file == nullptr) { |
| return false; |
| } |
| |
| CompilerFilter::Filter current = file->GetCompilerFilter(); |
| if (profile_changed && CompilerFilter::DependsOnProfile(current)) { |
| VLOG(oat) << "Compiler filter not okay because Profile changed"; |
| return false; |
| } |
| return downgrade ? !CompilerFilter::IsBetter(current, target) : |
| CompilerFilter::IsAsGoodAs(current, target); |
| } |
| |
| bool OatFileAssistant::OatFileInfo::ClassLoaderContextIsOkay(ClassLoaderContext* context) { |
| if (context == nullptr) { |
| VLOG(oat) << "ClassLoaderContext check ignored: null context"; |
| return true; |
| } |
| |
| const OatFile* file = GetFile(); |
| if (file == nullptr) { |
| // No oat file means we have nothing to verify. |
| return true; |
| } |
| |
| size_t dir_index = oat_file_assistant_->dex_location_.rfind('/'); |
| std::string classpath_dir = (dir_index != std::string::npos) |
| ? oat_file_assistant_->dex_location_.substr(0, dir_index) |
| : ""; |
| |
| if (!context->OpenDexFiles(oat_file_assistant_->isa_, classpath_dir)) { |
| VLOG(oat) << "ClassLoaderContext check failed: dex files from the context could not be opened"; |
| return false; |
| } |
| |
| |
| const bool result = context->VerifyClassLoaderContextMatch(file->GetClassLoaderContext()) != |
| ClassLoaderContext::VerificationResult::kMismatch; |
| if (!result) { |
| VLOG(oat) << "ClassLoaderContext check failed. Context was " |
| << file->GetClassLoaderContext() |
| << ". The expected context is " << context->EncodeContextForOatFile(classpath_dir); |
| } |
| return result; |
| } |
| |
| bool OatFileAssistant::OatFileInfo::IsExecutable() { |
| const OatFile* file = GetFile(); |
| return (file != nullptr && file->IsExecutable()); |
| } |
| |
| void OatFileAssistant::OatFileInfo::Reset() { |
| load_attempted_ = false; |
| file_.reset(); |
| status_attempted_ = false; |
| } |
| |
| void OatFileAssistant::OatFileInfo::Reset(const std::string& filename, |
| bool use_fd, |
| int zip_fd, |
| int vdex_fd, |
| int oat_fd) { |
| filename_provided_ = true; |
| filename_ = filename; |
| use_fd_ = use_fd; |
| zip_fd_ = zip_fd; |
| vdex_fd_ = vdex_fd; |
| oat_fd_ = oat_fd; |
| Reset(); |
| } |
| |
| std::unique_ptr<OatFile> OatFileAssistant::OatFileInfo::ReleaseFile() { |
| file_released_ = true; |
| return std::move(file_); |
| } |
| |
| std::unique_ptr<OatFile> OatFileAssistant::OatFileInfo::ReleaseFileForUse() { |
| if (Status() == kOatUpToDate) { |
| return ReleaseFile(); |
| } |
| |
| VLOG(oat) << "Oat File Assistant: No relocated oat file found," |
| << " attempting to fall back to interpreting oat file instead."; |
| |
| switch (Status()) { |
| case kOatBootImageOutOfDate: |
| // OutOfDate may be either a mismatched image, or a missing image. |
| if (oat_file_assistant_->HasOriginalDexFiles()) { |
| // If there are original dex files, it is better to use them (to avoid a potential |
| // quickening mismatch because the boot image changed). |
| break; |
| } |
| // If we do not accept the oat file, we may not have access to dex bytecode at all. Grudgingly |
| // go forward. |
| FALLTHROUGH_INTENDED; |
| |
| case kOatUpToDate: |
| case kOatCannotOpen: |
| case kOatDexOutOfDate: |
| break; |
| } |
| |
| return std::unique_ptr<OatFile>(); |
| } |
| |
| // TODO(calin): we could provide a more refined status here |
| // (e.g. run from uncompressed apk, run with vdex but not oat etc). It will allow us to |
| // track more experiments but adds extra complexity. |
| void OatFileAssistant::GetOptimizationStatus( |
| const std::string& filename, |
| InstructionSet isa, |
| std::string* out_compilation_filter, |
| std::string* out_compilation_reason) { |
| // It may not be possible to load an oat file executable (e.g., selinux restrictions). Load |
| // non-executable and check the status manually. |
| OatFileAssistant oat_file_assistant(filename.c_str(), isa, /*load_executable=*/ false); |
| std::unique_ptr<OatFile> oat_file = oat_file_assistant.GetBestOatFile(); |
| |
| if (oat_file == nullptr) { |
| *out_compilation_filter = "run-from-apk"; |
| *out_compilation_reason = "unknown"; |
| return; |
| } |
| |
| OatStatus status = oat_file_assistant.GivenOatFileStatus(*oat_file); |
| const char* reason = oat_file->GetCompilationReason(); |
| *out_compilation_reason = reason == nullptr ? "unknown" : reason; |
| switch (status) { |
| case OatStatus::kOatUpToDate: |
| *out_compilation_filter = CompilerFilter::NameOfFilter(oat_file->GetCompilerFilter()); |
| return; |
| |
| case kOatCannotOpen: // This should never happen, but be robust. |
| *out_compilation_filter = "error"; |
| *out_compilation_reason = "error"; |
| return; |
| |
| // kOatBootImageOutOfDate - The oat file is up to date with respect to the |
| // dex file, but is out of date with respect to the boot image. |
| case kOatBootImageOutOfDate: |
| FALLTHROUGH_INTENDED; |
| case kOatDexOutOfDate: |
| if (oat_file_assistant.HasOriginalDexFiles()) { |
| *out_compilation_filter = "run-from-apk-fallback"; |
| } else { |
| *out_compilation_filter = "run-from-vdex-fallback"; |
| } |
| return; |
| } |
| LOG(FATAL) << "Unreachable"; |
| UNREACHABLE(); |
| } |
| |
| } // namespace art |
