| /* |
| * Copyright (C) 2015 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 "profile_compilation_info.h" |
| |
| #include "errno.h" |
| #include <limits.h> |
| #include <string> |
| #include <vector> |
| #include <stdlib.h> |
| #include <sys/file.h> |
| #include <sys/stat.h> |
| #include <sys/uio.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <zlib.h> |
| #include <base/time_utils.h> |
| |
| #include "base/arena_allocator.h" |
| #include "base/dumpable.h" |
| #include "base/mutex.h" |
| #include "base/scoped_flock.h" |
| #include "base/stl_util.h" |
| #include "base/systrace.h" |
| #include "base/unix_file/fd_file.h" |
| #include "jit/profiling_info.h" |
| #include "os.h" |
| #include "safe_map.h" |
| #include "utils.h" |
| #include "android-base/file.h" |
| |
| namespace art { |
| |
| const uint8_t ProfileCompilationInfo::kProfileMagic[] = { 'p', 'r', 'o', '\0' }; |
| // Last profile version: Move startup methods to use a bitmap. Also add support for post-startup |
| // methods. |
| const uint8_t ProfileCompilationInfo::kProfileVersion[] = { '0', '0', '8', '\0' }; |
| |
| static constexpr uint16_t kMaxDexFileKeyLength = PATH_MAX; |
| |
| // Debug flag to ignore checksums when testing if a method or a class is present in the profile. |
| // Used to facilitate testing profile guided compilation across a large number of apps |
| // using the same test profile. |
| static constexpr bool kDebugIgnoreChecksum = false; |
| |
| static constexpr uint8_t kIsMissingTypesEncoding = 6; |
| static constexpr uint8_t kIsMegamorphicEncoding = 7; |
| |
| static_assert(sizeof(InlineCache::kIndividualCacheSize) == sizeof(uint8_t), |
| "InlineCache::kIndividualCacheSize does not have the expect type size"); |
| static_assert(InlineCache::kIndividualCacheSize < kIsMegamorphicEncoding, |
| "InlineCache::kIndividualCacheSize is larger than expected"); |
| static_assert(InlineCache::kIndividualCacheSize < kIsMissingTypesEncoding, |
| "InlineCache::kIndividualCacheSize is larger than expected"); |
| |
| static bool ChecksumMatch(uint32_t dex_file_checksum, uint32_t checksum) { |
| return kDebugIgnoreChecksum || dex_file_checksum == checksum; |
| } |
| |
| ProfileCompilationInfo::ProfileCompilationInfo(ArenaPool* custom_arena_pool) |
| : default_arena_pool_(), |
| arena_(custom_arena_pool), |
| info_(arena_.Adapter(kArenaAllocProfile)), |
| profile_key_map_(std::less<const std::string>(), arena_.Adapter(kArenaAllocProfile)) { |
| } |
| |
| ProfileCompilationInfo::ProfileCompilationInfo() |
| : default_arena_pool_(/*use_malloc*/true, /*low_4gb*/false, "ProfileCompilationInfo"), |
| arena_(&default_arena_pool_), |
| info_(arena_.Adapter(kArenaAllocProfile)), |
| profile_key_map_(std::less<const std::string>(), arena_.Adapter(kArenaAllocProfile)) { |
| } |
| |
| ProfileCompilationInfo::~ProfileCompilationInfo() { |
| VLOG(profiler) << Dumpable<MemStats>(arena_.GetMemStats()); |
| for (DexFileData* data : info_) { |
| delete data; |
| } |
| } |
| |
| void ProfileCompilationInfo::DexPcData::AddClass(uint16_t dex_profile_idx, |
| const dex::TypeIndex& type_idx) { |
| if (is_megamorphic || is_missing_types) { |
| return; |
| } |
| |
| // Perform an explicit lookup for the type instead of directly emplacing the |
| // element. We do this because emplace() allocates the node before doing the |
| // lookup and if it then finds an identical element, it shall deallocate the |
| // node. For Arena allocations, that's essentially a leak. |
| ClassReference ref(dex_profile_idx, type_idx); |
| auto it = classes.find(ref); |
| if (it != classes.end()) { |
| // The type index exists. |
| return; |
| } |
| |
| // Check if the adding the type will cause the cache to become megamorphic. |
| if (classes.size() + 1 >= InlineCache::kIndividualCacheSize) { |
| is_megamorphic = true; |
| classes.clear(); |
| return; |
| } |
| |
| // The type does not exist and the inline cache will not be megamorphic. |
| classes.insert(ref); |
| } |
| |
| // Transform the actual dex location into relative paths. |
| // Note: this is OK because we don't store profiles of different apps into the same file. |
| // Apps with split apks don't cause trouble because each split has a different name and will not |
| // collide with other entries. |
| std::string ProfileCompilationInfo::GetProfileDexFileKey(const std::string& dex_location) { |
| DCHECK(!dex_location.empty()); |
| size_t last_sep_index = dex_location.find_last_of('/'); |
| if (last_sep_index == std::string::npos) { |
| return dex_location; |
| } else { |
| DCHECK(last_sep_index < dex_location.size()); |
| return dex_location.substr(last_sep_index + 1); |
| } |
| } |
| |
| bool ProfileCompilationInfo::AddMethodIndex(MethodHotness::Flag flags, const MethodReference& ref) { |
| DexFileData* data = GetOrAddDexFileData(ref.dex_file); |
| if (data == nullptr) { |
| return false; |
| } |
| data->AddMethod(flags, ref.dex_method_index); |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::AddMethodIndex(MethodHotness::Flag flags, |
| const std::string& dex_location, |
| uint32_t checksum, |
| uint16_t method_idx, |
| uint32_t num_method_ids) { |
| DexFileData* data = GetOrAddDexFileData(GetProfileDexFileKey(dex_location), |
| checksum, |
| num_method_ids); |
| if (data == nullptr) { |
| return false; |
| } |
| data->AddMethod(flags, method_idx); |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::AddMethods(const std::vector<ProfileMethodInfo>& methods) { |
| for (const ProfileMethodInfo& method : methods) { |
| if (!AddMethod(method)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::AddClasses(const std::set<DexCacheResolvedClasses>& resolved_classes) { |
| for (const DexCacheResolvedClasses& dex_cache : resolved_classes) { |
| if (!AddResolvedClasses(dex_cache)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::Load(const std::string& filename, bool clear_if_invalid) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| std::string error; |
| int flags = O_RDWR | O_NOFOLLOW | O_CLOEXEC; |
| // There's no need to fsync profile data right away. We get many chances |
| // to write it again in case something goes wrong. We can rely on a simple |
| // close(), no sync, and let to the kernel decide when to write to disk. |
| ScopedFlock profile_file = LockedFile::Open(filename.c_str(), flags, |
| /*block*/false, &error); |
| |
| if (profile_file.get() == nullptr) { |
| LOG(WARNING) << "Couldn't lock the profile file " << filename << ": " << error; |
| return false; |
| } |
| |
| int fd = profile_file->Fd(); |
| |
| ProfileLoadSatus status = LoadInternal(fd, &error); |
| if (status == kProfileLoadSuccess) { |
| return true; |
| } |
| |
| if (clear_if_invalid && |
| ((status == kProfileLoadVersionMismatch) || (status == kProfileLoadBadData))) { |
| LOG(WARNING) << "Clearing bad or obsolete profile data from file " |
| << filename << ": " << error; |
| if (profile_file->ClearContent()) { |
| return true; |
| } else { |
| PLOG(WARNING) << "Could not clear profile file: " << filename; |
| return false; |
| } |
| } |
| |
| LOG(WARNING) << "Could not load profile data from file " << filename << ": " << error; |
| return false; |
| } |
| |
| bool ProfileCompilationInfo::Save(const std::string& filename, uint64_t* bytes_written) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| std::string error; |
| int flags = O_WRONLY | O_NOFOLLOW | O_CLOEXEC; |
| // There's no need to fsync profile data right away. We get many chances |
| // to write it again in case something goes wrong. We can rely on a simple |
| // close(), no sync, and let to the kernel decide when to write to disk. |
| ScopedFlock profile_file = LockedFile::Open(filename.c_str(), flags, |
| /*block*/false, &error); |
| if (profile_file.get() == nullptr) { |
| LOG(WARNING) << "Couldn't lock the profile file " << filename << ": " << error; |
| return false; |
| } |
| |
| int fd = profile_file->Fd(); |
| |
| // We need to clear the data because we don't support appending to the profiles yet. |
| if (!profile_file->ClearContent()) { |
| PLOG(WARNING) << "Could not clear profile file: " << filename; |
| return false; |
| } |
| |
| // This doesn't need locking because we are trying to lock the file for exclusive |
| // access and fail immediately if we can't. |
| bool result = Save(fd); |
| if (result) { |
| int64_t size = GetFileSizeBytes(filename); |
| if (size != -1) { |
| VLOG(profiler) |
| << "Successfully saved profile info to " << filename << " Size: " |
| << size; |
| if (bytes_written != nullptr) { |
| *bytes_written = static_cast<uint64_t>(size); |
| } |
| } |
| } else { |
| VLOG(profiler) << "Failed to save profile info to " << filename; |
| } |
| return result; |
| } |
| |
| // Returns true if all the bytes were successfully written to the file descriptor. |
| static bool WriteBuffer(int fd, const uint8_t* buffer, size_t byte_count) { |
| while (byte_count > 0) { |
| int bytes_written = TEMP_FAILURE_RETRY(write(fd, buffer, byte_count)); |
| if (bytes_written == -1) { |
| return false; |
| } |
| byte_count -= bytes_written; // Reduce the number of remaining bytes. |
| buffer += bytes_written; // Move the buffer forward. |
| } |
| return true; |
| } |
| |
| // Add the string bytes to the buffer. |
| static void AddStringToBuffer(std::vector<uint8_t>* buffer, const std::string& value) { |
| buffer->insert(buffer->end(), value.begin(), value.end()); |
| } |
| |
| // Insert each byte, from low to high into the buffer. |
| template <typename T> |
| static void AddUintToBuffer(std::vector<uint8_t>* buffer, T value) { |
| for (size_t i = 0; i < sizeof(T); i++) { |
| buffer->push_back((value >> (i * kBitsPerByte)) & 0xff); |
| } |
| } |
| |
| static constexpr size_t kLineHeaderSize = |
| 2 * sizeof(uint16_t) + // class_set.size + dex_location.size |
| 3 * sizeof(uint32_t); // method_map.size + checksum + num_method_ids |
| |
| /** |
| * Serialization format: |
| * magic,version,number_of_dex_files,uncompressed_size_of_zipped_data,compressed_data_size, |
| * zipped[dex_location1,number_of_classes1,methods_region_size,dex_location_checksum1 |
| * num_method_ids, |
| * method_encoding_11,method_encoding_12...,class_id1,class_id2... |
| * startup/post startup bitmap, |
| * dex_location2,number_of_classes2,methods_region_size,dex_location_checksum2, num_method_ids, |
| * method_encoding_21,method_encoding_22...,,class_id1,class_id2... |
| * startup/post startup bitmap, |
| * .....] |
| * The method_encoding is: |
| * method_id,number_of_inline_caches,inline_cache1,inline_cache2... |
| * The inline_cache is: |
| * dex_pc,[M|dex_map_size], dex_profile_index,class_id1,class_id2...,dex_profile_index2,... |
| * dex_map_size is the number of dex_indeces that follows. |
| * Classes are grouped per their dex files and the line |
| * `dex_profile_index,class_id1,class_id2...,dex_profile_index2,...` encodes the |
| * mapping from `dex_profile_index` to the set of classes `class_id1,class_id2...` |
| * M stands for megamorphic or missing types and it's encoded as either |
| * the byte kIsMegamorphicEncoding or kIsMissingTypesEncoding. |
| * When present, there will be no class ids following. |
| **/ |
| bool ProfileCompilationInfo::Save(int fd) { |
| uint64_t start = NanoTime(); |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| DCHECK_GE(fd, 0); |
| |
| // Use a vector wrapper to avoid keeping track of offsets when we add elements. |
| std::vector<uint8_t> buffer; |
| if (!WriteBuffer(fd, kProfileMagic, sizeof(kProfileMagic))) { |
| return false; |
| } |
| if (!WriteBuffer(fd, kProfileVersion, sizeof(kProfileVersion))) { |
| return false; |
| } |
| DCHECK_LE(info_.size(), std::numeric_limits<uint8_t>::max()); |
| AddUintToBuffer(&buffer, static_cast<uint8_t>(info_.size())); |
| |
| uint32_t required_capacity = 0; |
| for (const DexFileData* dex_data_ptr : info_) { |
| const DexFileData& dex_data = *dex_data_ptr; |
| uint32_t methods_region_size = GetMethodsRegionSize(dex_data); |
| required_capacity += kLineHeaderSize + |
| dex_data.profile_key.size() + |
| sizeof(uint16_t) * dex_data.class_set.size() + |
| methods_region_size + |
| dex_data.bitmap_storage.size(); |
| } |
| // Allow large profiles for non target builds for the case where we are merging many profiles |
| // to generate a boot image profile. |
| if (kIsTargetBuild && required_capacity > kProfileSizeErrorThresholdInBytes) { |
| LOG(ERROR) << "Profile data size exceeds " |
| << std::to_string(kProfileSizeErrorThresholdInBytes) |
| << " bytes. Profile will not be written to disk."; |
| return false; |
| } |
| if (required_capacity > kProfileSizeWarningThresholdInBytes) { |
| LOG(WARNING) << "Profile data size exceeds " |
| << std::to_string(kProfileSizeWarningThresholdInBytes); |
| } |
| AddUintToBuffer(&buffer, required_capacity); |
| if (!WriteBuffer(fd, buffer.data(), buffer.size())) { |
| return false; |
| } |
| // Make sure that the buffer has enough capacity to avoid repeated resizings |
| // while we add data. |
| buffer.reserve(required_capacity); |
| buffer.clear(); |
| |
| // Dex files must be written in the order of their profile index. This |
| // avoids writing the index in the output file and simplifies the parsing logic. |
| for (const DexFileData* dex_data_ptr : info_) { |
| const DexFileData& dex_data = *dex_data_ptr; |
| |
| // Note that we allow dex files without any methods or classes, so that |
| // inline caches can refer valid dex files. |
| |
| if (dex_data.profile_key.size() >= kMaxDexFileKeyLength) { |
| LOG(WARNING) << "DexFileKey exceeds allocated limit"; |
| return false; |
| } |
| |
| uint32_t methods_region_size = GetMethodsRegionSize(dex_data); |
| |
| DCHECK_LE(dex_data.profile_key.size(), std::numeric_limits<uint16_t>::max()); |
| DCHECK_LE(dex_data.class_set.size(), std::numeric_limits<uint16_t>::max()); |
| // Write profile line header. |
| AddUintToBuffer(&buffer, static_cast<uint16_t>(dex_data.profile_key.size())); |
| AddUintToBuffer(&buffer, static_cast<uint16_t>(dex_data.class_set.size())); |
| AddUintToBuffer(&buffer, methods_region_size); // uint32_t |
| AddUintToBuffer(&buffer, dex_data.checksum); // uint32_t |
| AddUintToBuffer(&buffer, dex_data.num_method_ids); // uint32_t |
| |
| AddStringToBuffer(&buffer, dex_data.profile_key); |
| |
| uint16_t last_method_index = 0; |
| for (const auto& method_it : dex_data.method_map) { |
| // Store the difference between the method indices. The SafeMap is ordered by |
| // method_id, so the difference will always be non negative. |
| DCHECK_GE(method_it.first, last_method_index); |
| uint16_t diff_with_last_method_index = method_it.first - last_method_index; |
| last_method_index = method_it.first; |
| AddUintToBuffer(&buffer, diff_with_last_method_index); |
| AddInlineCacheToBuffer(&buffer, method_it.second); |
| } |
| |
| uint16_t last_class_index = 0; |
| for (const auto& class_id : dex_data.class_set) { |
| // Store the difference between the class indices. The set is ordered by |
| // class_id, so the difference will always be non negative. |
| DCHECK_GE(class_id.index_, last_class_index); |
| uint16_t diff_with_last_class_index = class_id.index_ - last_class_index; |
| last_class_index = class_id.index_; |
| AddUintToBuffer(&buffer, diff_with_last_class_index); |
| } |
| |
| buffer.insert(buffer.end(), |
| dex_data.bitmap_storage.begin(), |
| dex_data.bitmap_storage.end()); |
| } |
| |
| uint32_t output_size = 0; |
| std::unique_ptr<uint8_t[]> compressed_buffer = DeflateBuffer(buffer.data(), |
| required_capacity, |
| &output_size); |
| |
| buffer.clear(); |
| AddUintToBuffer(&buffer, output_size); |
| |
| if (!WriteBuffer(fd, buffer.data(), buffer.size())) { |
| return false; |
| } |
| if (!WriteBuffer(fd, compressed_buffer.get(), output_size)) { |
| return false; |
| } |
| uint64_t total_time = NanoTime() - start; |
| VLOG(profiler) << "Compressed from " |
| << std::to_string(required_capacity) |
| << " to " |
| << std::to_string(output_size); |
| VLOG(profiler) << "Time to save profile: " << std::to_string(total_time); |
| return true; |
| } |
| |
| void ProfileCompilationInfo::AddInlineCacheToBuffer(std::vector<uint8_t>* buffer, |
| const InlineCacheMap& inline_cache_map) { |
| // Add inline cache map size. |
| AddUintToBuffer(buffer, static_cast<uint16_t>(inline_cache_map.size())); |
| if (inline_cache_map.size() == 0) { |
| return; |
| } |
| for (const auto& inline_cache_it : inline_cache_map) { |
| uint16_t dex_pc = inline_cache_it.first; |
| const DexPcData dex_pc_data = inline_cache_it.second; |
| const ClassSet& classes = dex_pc_data.classes; |
| |
| // Add the dex pc. |
| AddUintToBuffer(buffer, dex_pc); |
| |
| // Add the megamorphic/missing_types encoding if needed and continue. |
| // In either cases we don't add any classes to the profiles and so there's |
| // no point to continue. |
| // TODO(calin): in case we miss types there is still value to add the |
| // rest of the classes. They can be added without bumping the profile version. |
| if (dex_pc_data.is_missing_types) { |
| DCHECK(!dex_pc_data.is_megamorphic); // at this point the megamorphic flag should not be set. |
| DCHECK_EQ(classes.size(), 0u); |
| AddUintToBuffer(buffer, kIsMissingTypesEncoding); |
| continue; |
| } else if (dex_pc_data.is_megamorphic) { |
| DCHECK_EQ(classes.size(), 0u); |
| AddUintToBuffer(buffer, kIsMegamorphicEncoding); |
| continue; |
| } |
| |
| DCHECK_LT(classes.size(), InlineCache::kIndividualCacheSize); |
| DCHECK_NE(classes.size(), 0u) << "InlineCache contains a dex_pc with 0 classes"; |
| |
| SafeMap<uint8_t, std::vector<dex::TypeIndex>> dex_to_classes_map; |
| // Group the classes by dex. We expect that most of the classes will come from |
| // the same dex, so this will be more efficient than encoding the dex index |
| // for each class reference. |
| GroupClassesByDex(classes, &dex_to_classes_map); |
| // Add the dex map size. |
| AddUintToBuffer(buffer, static_cast<uint8_t>(dex_to_classes_map.size())); |
| for (const auto& dex_it : dex_to_classes_map) { |
| uint8_t dex_profile_index = dex_it.first; |
| const std::vector<dex::TypeIndex>& dex_classes = dex_it.second; |
| // Add the dex profile index. |
| AddUintToBuffer(buffer, dex_profile_index); |
| // Add the the number of classes for each dex profile index. |
| AddUintToBuffer(buffer, static_cast<uint8_t>(dex_classes.size())); |
| for (size_t i = 0; i < dex_classes.size(); i++) { |
| // Add the type index of the classes. |
| AddUintToBuffer(buffer, dex_classes[i].index_); |
| } |
| } |
| } |
| } |
| |
| uint32_t ProfileCompilationInfo::GetMethodsRegionSize(const DexFileData& dex_data) { |
| // ((uint16_t)method index + (uint16_t)inline cache size) * number of methods |
| uint32_t size = 2 * sizeof(uint16_t) * dex_data.method_map.size(); |
| for (const auto& method_it : dex_data.method_map) { |
| const InlineCacheMap& inline_cache = method_it.second; |
| size += sizeof(uint16_t) * inline_cache.size(); // dex_pc |
| for (const auto& inline_cache_it : inline_cache) { |
| const ClassSet& classes = inline_cache_it.second.classes; |
| SafeMap<uint8_t, std::vector<dex::TypeIndex>> dex_to_classes_map; |
| GroupClassesByDex(classes, &dex_to_classes_map); |
| size += sizeof(uint8_t); // dex_to_classes_map size |
| for (const auto& dex_it : dex_to_classes_map) { |
| size += sizeof(uint8_t); // dex profile index |
| size += sizeof(uint8_t); // number of classes |
| const std::vector<dex::TypeIndex>& dex_classes = dex_it.second; |
| size += sizeof(uint16_t) * dex_classes.size(); // the actual classes |
| } |
| } |
| } |
| return size; |
| } |
| |
| void ProfileCompilationInfo::GroupClassesByDex( |
| const ClassSet& classes, |
| /*out*/SafeMap<uint8_t, std::vector<dex::TypeIndex>>* dex_to_classes_map) { |
| for (const auto& classes_it : classes) { |
| auto dex_it = dex_to_classes_map->FindOrAdd(classes_it.dex_profile_index); |
| dex_it->second.push_back(classes_it.type_index); |
| } |
| } |
| |
| ProfileCompilationInfo::DexFileData* ProfileCompilationInfo::GetOrAddDexFileData( |
| const std::string& profile_key, |
| uint32_t checksum, |
| uint32_t num_method_ids) { |
| const auto profile_index_it = profile_key_map_.FindOrAdd(profile_key, profile_key_map_.size()); |
| if (profile_key_map_.size() > std::numeric_limits<uint8_t>::max()) { |
| // Allow only 255 dex files to be profiled. This allows us to save bytes |
| // when encoding. The number is well above what we expect for normal applications. |
| if (kIsDebugBuild) { |
| LOG(ERROR) << "Exceeded the maximum number of dex files (255). Something went wrong"; |
| } |
| profile_key_map_.erase(profile_key); |
| return nullptr; |
| } |
| |
| uint8_t profile_index = profile_index_it->second; |
| if (info_.size() <= profile_index) { |
| // This is a new addition. Add it to the info_ array. |
| DexFileData* dex_file_data = new (&arena_) DexFileData( |
| &arena_, |
| profile_key, |
| checksum, |
| profile_index, |
| num_method_ids); |
| info_.push_back(dex_file_data); |
| } |
| DexFileData* result = info_[profile_index]; |
| // DCHECK that profile info map key is consistent with the one stored in the dex file data. |
| // This should always be the case since since the cache map is managed by ProfileCompilationInfo. |
| DCHECK_EQ(profile_key, result->profile_key); |
| DCHECK_EQ(profile_index, result->profile_index); |
| DCHECK_EQ(num_method_ids, result->num_method_ids); |
| |
| // Check that the checksum matches. |
| // This may different if for example the dex file was updated and we had a record of the old one. |
| if (result->checksum != checksum) { |
| LOG(WARNING) << "Checksum mismatch for dex " << profile_key; |
| return nullptr; |
| } |
| return result; |
| } |
| |
| const ProfileCompilationInfo::DexFileData* ProfileCompilationInfo::FindDexData( |
| const std::string& profile_key, |
| uint32_t checksum, |
| bool verify_checksum) const { |
| const auto profile_index_it = profile_key_map_.find(profile_key); |
| if (profile_index_it == profile_key_map_.end()) { |
| return nullptr; |
| } |
| |
| uint8_t profile_index = profile_index_it->second; |
| const DexFileData* result = info_[profile_index]; |
| if (verify_checksum && !ChecksumMatch(result->checksum, checksum)) { |
| return nullptr; |
| } |
| DCHECK_EQ(profile_key, result->profile_key); |
| DCHECK_EQ(profile_index, result->profile_index); |
| return result; |
| } |
| |
| bool ProfileCompilationInfo::AddResolvedClasses(const DexCacheResolvedClasses& classes) { |
| const std::string dex_location = GetProfileDexFileKey(classes.GetDexLocation()); |
| const uint32_t checksum = classes.GetLocationChecksum(); |
| DexFileData* const data = GetOrAddDexFileData(dex_location, checksum, classes.NumMethodIds()); |
| if (data == nullptr) { |
| return false; |
| } |
| data->class_set.insert(classes.GetClasses().begin(), classes.GetClasses().end()); |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::AddMethod(const std::string& dex_location, |
| uint32_t dex_checksum, |
| uint16_t method_index, |
| uint32_t num_method_ids, |
| const OfflineProfileMethodInfo& pmi) { |
| DexFileData* const data = GetOrAddDexFileData(GetProfileDexFileKey(dex_location), |
| dex_checksum, |
| num_method_ids); |
| if (data == nullptr) { // checksum mismatch |
| return false; |
| } |
| // Add the method. |
| InlineCacheMap* inline_cache = data->FindOrAddMethod(method_index); |
| |
| if (pmi.inline_caches == nullptr) { |
| // If we don't have inline caches return success right away. |
| return true; |
| } |
| for (const auto& pmi_inline_cache_it : *pmi.inline_caches) { |
| uint16_t pmi_ic_dex_pc = pmi_inline_cache_it.first; |
| const DexPcData& pmi_ic_dex_pc_data = pmi_inline_cache_it.second; |
| DexPcData* dex_pc_data = FindOrAddDexPc(inline_cache, pmi_ic_dex_pc); |
| if (dex_pc_data->is_missing_types || dex_pc_data->is_megamorphic) { |
| // We are already megamorphic or we are missing types; no point in going forward. |
| continue; |
| } |
| |
| if (pmi_ic_dex_pc_data.is_missing_types) { |
| dex_pc_data->SetIsMissingTypes(); |
| continue; |
| } |
| if (pmi_ic_dex_pc_data.is_megamorphic) { |
| dex_pc_data->SetIsMegamorphic(); |
| continue; |
| } |
| |
| for (const ClassReference& class_ref : pmi_ic_dex_pc_data.classes) { |
| const DexReference& dex_ref = pmi.dex_references[class_ref.dex_profile_index]; |
| DexFileData* class_dex_data = GetOrAddDexFileData( |
| GetProfileDexFileKey(dex_ref.dex_location), |
| dex_ref.dex_checksum, |
| dex_ref.num_method_ids); |
| if (class_dex_data == nullptr) { // checksum mismatch |
| return false; |
| } |
| dex_pc_data->AddClass(class_dex_data->profile_index, class_ref.type_index); |
| } |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::AddMethod(const ProfileMethodInfo& pmi) { |
| DexFileData* const data = GetOrAddDexFileData(pmi.ref.dex_file); |
| if (data == nullptr) { // checksum mismatch |
| return false; |
| } |
| InlineCacheMap* inline_cache = data->FindOrAddMethod(pmi.ref.dex_method_index); |
| |
| for (const ProfileMethodInfo::ProfileInlineCache& cache : pmi.inline_caches) { |
| if (cache.is_missing_types) { |
| FindOrAddDexPc(inline_cache, cache.dex_pc)->SetIsMissingTypes(); |
| continue; |
| } |
| for (const TypeReference& class_ref : cache.classes) { |
| DexFileData* class_dex_data = GetOrAddDexFileData(class_ref.dex_file); |
| if (class_dex_data == nullptr) { // checksum mismatch |
| return false; |
| } |
| DexPcData* dex_pc_data = FindOrAddDexPc(inline_cache, cache.dex_pc); |
| if (dex_pc_data->is_missing_types) { |
| // Don't bother adding classes if we are missing types. |
| break; |
| } |
| dex_pc_data->AddClass(class_dex_data->profile_index, class_ref.type_index); |
| } |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::AddClassIndex(const std::string& dex_location, |
| uint32_t checksum, |
| dex::TypeIndex type_idx, |
| uint32_t num_method_ids) { |
| DexFileData* const data = GetOrAddDexFileData(dex_location, checksum, num_method_ids); |
| if (data == nullptr) { |
| return false; |
| } |
| data->class_set.insert(type_idx); |
| return true; |
| } |
| |
| #define READ_UINT(type, buffer, dest, error) \ |
| do { \ |
| if (!(buffer).ReadUintAndAdvance<type>(&(dest))) { \ |
| *(error) = "Could not read "#dest; \ |
| return false; \ |
| } \ |
| } \ |
| while (false) |
| |
| bool ProfileCompilationInfo::ReadInlineCache(SafeBuffer& buffer, |
| uint8_t number_of_dex_files, |
| /*out*/ InlineCacheMap* inline_cache, |
| /*out*/ std::string* error) { |
| uint16_t inline_cache_size; |
| READ_UINT(uint16_t, buffer, inline_cache_size, error); |
| for (; inline_cache_size > 0; inline_cache_size--) { |
| uint16_t dex_pc; |
| uint8_t dex_to_classes_map_size; |
| READ_UINT(uint16_t, buffer, dex_pc, error); |
| READ_UINT(uint8_t, buffer, dex_to_classes_map_size, error); |
| DexPcData* dex_pc_data = FindOrAddDexPc(inline_cache, dex_pc); |
| if (dex_to_classes_map_size == kIsMissingTypesEncoding) { |
| dex_pc_data->SetIsMissingTypes(); |
| continue; |
| } |
| if (dex_to_classes_map_size == kIsMegamorphicEncoding) { |
| dex_pc_data->SetIsMegamorphic(); |
| continue; |
| } |
| for (; dex_to_classes_map_size > 0; dex_to_classes_map_size--) { |
| uint8_t dex_profile_index; |
| uint8_t dex_classes_size; |
| READ_UINT(uint8_t, buffer, dex_profile_index, error); |
| READ_UINT(uint8_t, buffer, dex_classes_size, error); |
| if (dex_profile_index >= number_of_dex_files) { |
| *error = "dex_profile_index out of bounds "; |
| *error += std::to_string(dex_profile_index) + " " + std::to_string(number_of_dex_files); |
| return false; |
| } |
| for (; dex_classes_size > 0; dex_classes_size--) { |
| uint16_t type_index; |
| READ_UINT(uint16_t, buffer, type_index, error); |
| dex_pc_data->AddClass(dex_profile_index, dex::TypeIndex(type_index)); |
| } |
| } |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::ReadMethods(SafeBuffer& buffer, |
| uint8_t number_of_dex_files, |
| const ProfileLineHeader& line_header, |
| /*out*/std::string* error) { |
| uint32_t unread_bytes_before_operation = buffer.CountUnreadBytes(); |
| if (unread_bytes_before_operation < line_header.method_region_size_bytes) { |
| *error += "Profile EOF reached prematurely for ReadMethod"; |
| return kProfileLoadBadData; |
| } |
| size_t expected_unread_bytes_after_operation = buffer.CountUnreadBytes() |
| - line_header.method_region_size_bytes; |
| uint16_t last_method_index = 0; |
| while (buffer.CountUnreadBytes() > expected_unread_bytes_after_operation) { |
| DexFileData* const data = GetOrAddDexFileData(line_header.dex_location, |
| line_header.checksum, |
| line_header.num_method_ids); |
| uint16_t diff_with_last_method_index; |
| READ_UINT(uint16_t, buffer, diff_with_last_method_index, error); |
| uint16_t method_index = last_method_index + diff_with_last_method_index; |
| last_method_index = method_index; |
| InlineCacheMap* inline_cache = data->FindOrAddMethod(method_index); |
| if (!ReadInlineCache(buffer, number_of_dex_files, inline_cache, error)) { |
| return false; |
| } |
| } |
| uint32_t total_bytes_read = unread_bytes_before_operation - buffer.CountUnreadBytes(); |
| if (total_bytes_read != line_header.method_region_size_bytes) { |
| *error += "Profile data inconsistent for ReadMethods"; |
| return false; |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::ReadClasses(SafeBuffer& buffer, |
| const ProfileLineHeader& line_header, |
| /*out*/std::string* error) { |
| size_t unread_bytes_before_op = buffer.CountUnreadBytes(); |
| if (unread_bytes_before_op < line_header.class_set_size) { |
| *error += "Profile EOF reached prematurely for ReadClasses"; |
| return kProfileLoadBadData; |
| } |
| |
| uint16_t last_class_index = 0; |
| for (uint16_t i = 0; i < line_header.class_set_size; i++) { |
| uint16_t diff_with_last_class_index; |
| READ_UINT(uint16_t, buffer, diff_with_last_class_index, error); |
| uint16_t type_index = last_class_index + diff_with_last_class_index; |
| last_class_index = type_index; |
| if (!AddClassIndex(line_header.dex_location, |
| line_header.checksum, |
| dex::TypeIndex(type_index), |
| line_header.num_method_ids)) { |
| return false; |
| } |
| } |
| size_t total_bytes_read = unread_bytes_before_op - buffer.CountUnreadBytes(); |
| uint32_t expected_bytes_read = line_header.class_set_size * sizeof(uint16_t); |
| if (total_bytes_read != expected_bytes_read) { |
| *error += "Profile data inconsistent for ReadClasses"; |
| return false; |
| } |
| return true; |
| } |
| |
| // Tests for EOF by trying to read 1 byte from the descriptor. |
| // Returns: |
| // 0 if the descriptor is at the EOF, |
| // -1 if there was an IO error |
| // 1 if the descriptor has more content to read |
| static int testEOF(int fd) { |
| uint8_t buffer[1]; |
| return TEMP_FAILURE_RETRY(read(fd, buffer, 1)); |
| } |
| |
| // Reads an uint value previously written with AddUintToBuffer. |
| template <typename T> |
| bool ProfileCompilationInfo::SafeBuffer::ReadUintAndAdvance(/*out*/T* value) { |
| static_assert(std::is_unsigned<T>::value, "Type is not unsigned"); |
| if (ptr_current_ + sizeof(T) > ptr_end_) { |
| return false; |
| } |
| *value = 0; |
| for (size_t i = 0; i < sizeof(T); i++) { |
| *value += ptr_current_[i] << (i * kBitsPerByte); |
| } |
| ptr_current_ += sizeof(T); |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::SafeBuffer::CompareAndAdvance(const uint8_t* data, size_t data_size) { |
| if (ptr_current_ + data_size > ptr_end_) { |
| return false; |
| } |
| if (memcmp(ptr_current_, data, data_size) == 0) { |
| ptr_current_ += data_size; |
| return true; |
| } |
| return false; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::SafeBuffer::FillFromFd( |
| int fd, |
| const std::string& source, |
| /*out*/std::string* error) { |
| size_t byte_count = (ptr_end_ - ptr_current_) * sizeof(*ptr_current_); |
| uint8_t* buffer = ptr_current_; |
| while (byte_count > 0) { |
| int bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, byte_count)); |
| if (bytes_read == 0) { |
| *error += "Profile EOF reached prematurely for " + source; |
| return kProfileLoadBadData; |
| } else if (bytes_read < 0) { |
| *error += "Profile IO error for " + source + strerror(errno); |
| return kProfileLoadIOError; |
| } |
| byte_count -= bytes_read; |
| buffer += bytes_read; |
| } |
| return kProfileLoadSuccess; |
| } |
| |
| size_t ProfileCompilationInfo::SafeBuffer::CountUnreadBytes() { |
| return (ptr_end_ - ptr_current_) * sizeof(*ptr_current_); |
| } |
| |
| const uint8_t* ProfileCompilationInfo::SafeBuffer::GetCurrentPtr() { |
| return ptr_current_; |
| } |
| |
| void ProfileCompilationInfo::SafeBuffer::Advance(size_t data_size) { |
| ptr_current_ += data_size; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileHeader( |
| int fd, |
| /*out*/uint8_t* number_of_dex_files, |
| /*out*/uint32_t* uncompressed_data_size, |
| /*out*/uint32_t* compressed_data_size, |
| /*out*/std::string* error) { |
| // Read magic and version |
| const size_t kMagicVersionSize = |
| sizeof(kProfileMagic) + |
| sizeof(kProfileVersion) + |
| sizeof(uint8_t) + // number of dex files |
| sizeof(uint32_t) + // size of uncompressed profile data |
| sizeof(uint32_t); // size of compressed profile data |
| |
| SafeBuffer safe_buffer(kMagicVersionSize); |
| |
| ProfileLoadSatus status = safe_buffer.FillFromFd(fd, "ReadProfileHeader", error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| |
| if (!safe_buffer.CompareAndAdvance(kProfileMagic, sizeof(kProfileMagic))) { |
| *error = "Profile missing magic"; |
| return kProfileLoadVersionMismatch; |
| } |
| if (!safe_buffer.CompareAndAdvance(kProfileVersion, sizeof(kProfileVersion))) { |
| *error = "Profile version mismatch"; |
| return kProfileLoadVersionMismatch; |
| } |
| if (!safe_buffer.ReadUintAndAdvance<uint8_t>(number_of_dex_files)) { |
| *error = "Cannot read the number of dex files"; |
| return kProfileLoadBadData; |
| } |
| if (!safe_buffer.ReadUintAndAdvance<uint32_t>(uncompressed_data_size)) { |
| *error = "Cannot read the size of uncompressed data"; |
| return kProfileLoadBadData; |
| } |
| if (!safe_buffer.ReadUintAndAdvance<uint32_t>(compressed_data_size)) { |
| *error = "Cannot read the size of compressed data"; |
| return kProfileLoadBadData; |
| } |
| return kProfileLoadSuccess; |
| } |
| |
| bool ProfileCompilationInfo::ReadProfileLineHeaderElements(SafeBuffer& buffer, |
| /*out*/uint16_t* dex_location_size, |
| /*out*/ProfileLineHeader* line_header, |
| /*out*/std::string* error) { |
| READ_UINT(uint16_t, buffer, *dex_location_size, error); |
| READ_UINT(uint16_t, buffer, line_header->class_set_size, error); |
| READ_UINT(uint32_t, buffer, line_header->method_region_size_bytes, error); |
| READ_UINT(uint32_t, buffer, line_header->checksum, error); |
| READ_UINT(uint32_t, buffer, line_header->num_method_ids, error); |
| return true; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileLineHeader( |
| SafeBuffer& buffer, |
| /*out*/ProfileLineHeader* line_header, |
| /*out*/std::string* error) { |
| if (buffer.CountUnreadBytes() < kLineHeaderSize) { |
| *error += "Profile EOF reached prematurely for ReadProfileLineHeader"; |
| return kProfileLoadBadData; |
| } |
| |
| uint16_t dex_location_size; |
| if (!ReadProfileLineHeaderElements(buffer, &dex_location_size, line_header, error)) { |
| return kProfileLoadBadData; |
| } |
| |
| if (dex_location_size == 0 || dex_location_size > kMaxDexFileKeyLength) { |
| *error = "DexFileKey has an invalid size: " + |
| std::to_string(static_cast<uint32_t>(dex_location_size)); |
| return kProfileLoadBadData; |
| } |
| |
| if (buffer.CountUnreadBytes() < dex_location_size) { |
| *error += "Profile EOF reached prematurely for ReadProfileHeaderDexLocation"; |
| return kProfileLoadBadData; |
| } |
| const uint8_t* base_ptr = buffer.GetCurrentPtr(); |
| line_header->dex_location.assign( |
| reinterpret_cast<const char*>(base_ptr), dex_location_size); |
| buffer.Advance(dex_location_size); |
| return kProfileLoadSuccess; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileLine( |
| SafeBuffer& buffer, |
| uint8_t number_of_dex_files, |
| const ProfileLineHeader& line_header, |
| /*out*/std::string* error) { |
| DexFileData* data = GetOrAddDexFileData(line_header.dex_location, |
| line_header.checksum, |
| line_header.num_method_ids); |
| if (data == nullptr) { |
| *error = "Error when reading profile file line header: checksum mismatch for " |
| + line_header.dex_location; |
| return kProfileLoadBadData; |
| } |
| |
| if (!ReadMethods(buffer, number_of_dex_files, line_header, error)) { |
| return kProfileLoadBadData; |
| } |
| |
| if (!ReadClasses(buffer, line_header, error)) { |
| return kProfileLoadBadData; |
| } |
| |
| const size_t bytes = data->bitmap_storage.size(); |
| if (buffer.CountUnreadBytes() < bytes) { |
| *error += "Profile EOF reached prematurely for ReadProfileHeaderDexLocation"; |
| return kProfileLoadBadData; |
| } |
| const uint8_t* base_ptr = buffer.GetCurrentPtr(); |
| std::copy_n(base_ptr, bytes, &data->bitmap_storage[0]); |
| buffer.Advance(bytes); |
| // Read method bitmap. |
| return kProfileLoadSuccess; |
| } |
| |
| // TODO(calin): Fix this API. ProfileCompilationInfo::Load should be static and |
| // return a unique pointer to a ProfileCompilationInfo upon success. |
| bool ProfileCompilationInfo::Load(int fd) { |
| std::string error; |
| ProfileLoadSatus status = LoadInternal(fd, &error); |
| |
| if (status == kProfileLoadSuccess) { |
| return true; |
| } else { |
| LOG(WARNING) << "Error when reading profile: " << error; |
| return false; |
| } |
| } |
| |
| // TODO(calin): fail fast if the dex checksums don't match. |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::LoadInternal( |
| int fd, std::string* error) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| DCHECK_GE(fd, 0); |
| |
| if (!IsEmpty()) { |
| return kProfileLoadWouldOverwiteData; |
| } |
| |
| struct stat stat_buffer; |
| if (fstat(fd, &stat_buffer) != 0) { |
| return kProfileLoadIOError; |
| } |
| // We allow empty profile files. |
| // Profiles may be created by ActivityManager or installd before we manage to |
| // process them in the runtime or profman. |
| if (stat_buffer.st_size == 0) { |
| return kProfileLoadSuccess; |
| } |
| // Read profile header: magic + version + number_of_dex_files. |
| uint8_t number_of_dex_files; |
| uint32_t uncompressed_data_size; |
| uint32_t compressed_data_size; |
| ProfileLoadSatus status = ReadProfileHeader(fd, |
| &number_of_dex_files, |
| &uncompressed_data_size, |
| &compressed_data_size, |
| error); |
| |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| // Allow large profiles for non target builds for the case where we are merging many profiles |
| // to generate a boot image profile. |
| if (kIsTargetBuild && uncompressed_data_size > kProfileSizeErrorThresholdInBytes) { |
| LOG(ERROR) << "Profile data size exceeds " |
| << std::to_string(kProfileSizeErrorThresholdInBytes) |
| << " bytes"; |
| return kProfileLoadBadData; |
| } |
| if (uncompressed_data_size > kProfileSizeWarningThresholdInBytes) { |
| LOG(WARNING) << "Profile data size exceeds " |
| << std::to_string(kProfileSizeWarningThresholdInBytes) |
| << " bytes"; |
| } |
| |
| std::unique_ptr<uint8_t[]> compressed_data(new uint8_t[compressed_data_size]); |
| bool bytes_read_success = |
| android::base::ReadFully(fd, compressed_data.get(), compressed_data_size); |
| |
| if (testEOF(fd) != 0) { |
| *error += "Unexpected data in the profile file."; |
| return kProfileLoadBadData; |
| } |
| |
| if (!bytes_read_success) { |
| *error += "Unable to read compressed profile data"; |
| return kProfileLoadBadData; |
| } |
| |
| SafeBuffer uncompressed_data(uncompressed_data_size); |
| |
| int ret = InflateBuffer(compressed_data.get(), |
| compressed_data_size, |
| uncompressed_data_size, |
| uncompressed_data.Get()); |
| |
| if (ret != Z_STREAM_END) { |
| *error += "Error reading uncompressed profile data"; |
| return kProfileLoadBadData; |
| } |
| |
| for (uint8_t k = 0; k < number_of_dex_files; k++) { |
| ProfileLineHeader line_header; |
| |
| // First, read the line header to get the amount of data we need to read. |
| status = ReadProfileLineHeader(uncompressed_data, &line_header, error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| |
| // Now read the actual profile line. |
| status = ReadProfileLine(uncompressed_data, number_of_dex_files, line_header, error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| } |
| |
| // Check that we read everything and that profiles don't contain junk data. |
| if (uncompressed_data.CountUnreadBytes() > 0) { |
| *error = "Unexpected content in the profile file"; |
| return kProfileLoadBadData; |
| } else { |
| return kProfileLoadSuccess; |
| } |
| } |
| |
| std::unique_ptr<uint8_t[]> ProfileCompilationInfo::DeflateBuffer(const uint8_t* in_buffer, |
| uint32_t in_size, |
| uint32_t* compressed_data_size) { |
| z_stream strm; |
| strm.zalloc = Z_NULL; |
| strm.zfree = Z_NULL; |
| strm.opaque = Z_NULL; |
| int ret = deflateInit(&strm, 1); |
| if (ret != Z_OK) { |
| return nullptr; |
| } |
| |
| uint32_t out_size = deflateBound(&strm, in_size); |
| |
| std::unique_ptr<uint8_t[]> compressed_buffer(new uint8_t[out_size]); |
| strm.avail_in = in_size; |
| strm.next_in = const_cast<uint8_t*>(in_buffer); |
| strm.avail_out = out_size; |
| strm.next_out = &compressed_buffer[0]; |
| ret = deflate(&strm, Z_FINISH); |
| if (ret == Z_STREAM_ERROR) { |
| return nullptr; |
| } |
| *compressed_data_size = out_size - strm.avail_out; |
| deflateEnd(&strm); |
| return compressed_buffer; |
| } |
| |
| int ProfileCompilationInfo::InflateBuffer(const uint8_t* in_buffer, |
| uint32_t in_size, |
| uint32_t expected_uncompressed_data_size, |
| uint8_t* out_buffer) { |
| z_stream strm; |
| |
| /* allocate inflate state */ |
| strm.zalloc = Z_NULL; |
| strm.zfree = Z_NULL; |
| strm.opaque = Z_NULL; |
| strm.avail_in = in_size; |
| strm.next_in = const_cast<uint8_t*>(in_buffer); |
| strm.avail_out = expected_uncompressed_data_size; |
| strm.next_out = out_buffer; |
| |
| int ret; |
| inflateInit(&strm); |
| ret = inflate(&strm, Z_NO_FLUSH); |
| |
| if (strm.avail_in != 0 || strm.avail_out != 0) { |
| return Z_DATA_ERROR; |
| } |
| inflateEnd(&strm); |
| return ret; |
| } |
| |
| bool ProfileCompilationInfo::MergeWith(const ProfileCompilationInfo& other, |
| bool merge_classes) { |
| // First verify that all checksums match. This will avoid adding garbage to |
| // the current profile info. |
| // Note that the number of elements should be very small, so this should not |
| // be a performance issue. |
| for (const DexFileData* other_dex_data : other.info_) { |
| // verify_checksum is false because we want to differentiate between a missing dex data and |
| // a mismatched checksum. |
| const DexFileData* dex_data = FindDexData(other_dex_data->profile_key, |
| 0u, |
| /* verify_checksum */ false); |
| if ((dex_data != nullptr) && (dex_data->checksum != other_dex_data->checksum)) { |
| LOG(WARNING) << "Checksum mismatch for dex " << other_dex_data->profile_key; |
| return false; |
| } |
| } |
| // All checksums match. Import the data. |
| |
| // The other profile might have a different indexing of dex files. |
| // That is because each dex files gets a 'dex_profile_index' on a first come first served basis. |
| // That means that the order in with the methods are added to the profile matters for the |
| // actual indices. |
| // The reason we cannot rely on the actual multidex index is that a single profile may store |
| // data from multiple splits. This means that a profile may contain a classes2.dex from split-A |
| // and one from split-B. |
| |
| // First, build a mapping from other_dex_profile_index to this_dex_profile_index. |
| // This will make sure that the ClassReferences will point to the correct dex file. |
| SafeMap<uint8_t, uint8_t> dex_profile_index_remap; |
| for (const DexFileData* other_dex_data : other.info_) { |
| const DexFileData* dex_data = GetOrAddDexFileData(other_dex_data->profile_key, |
| other_dex_data->checksum, |
| other_dex_data->num_method_ids); |
| if (dex_data == nullptr) { |
| return false; // Could happen if we exceed the number of allowed dex files. |
| } |
| dex_profile_index_remap.Put(other_dex_data->profile_index, dex_data->profile_index); |
| } |
| |
| // Merge the actual profile data. |
| for (const DexFileData* other_dex_data : other.info_) { |
| DexFileData* dex_data = const_cast<DexFileData*>(FindDexData(other_dex_data->profile_key, |
| other_dex_data->checksum)); |
| DCHECK(dex_data != nullptr); |
| |
| // Merge the classes. |
| if (merge_classes) { |
| dex_data->class_set.insert(other_dex_data->class_set.begin(), |
| other_dex_data->class_set.end()); |
| } |
| |
| // Merge the methods and the inline caches. |
| for (const auto& other_method_it : other_dex_data->method_map) { |
| uint16_t other_method_index = other_method_it.first; |
| InlineCacheMap* inline_cache = dex_data->FindOrAddMethod(other_method_index); |
| const auto& other_inline_cache = other_method_it.second; |
| for (const auto& other_ic_it : other_inline_cache) { |
| uint16_t other_dex_pc = other_ic_it.first; |
| const ClassSet& other_class_set = other_ic_it.second.classes; |
| DexPcData* dex_pc_data = FindOrAddDexPc(inline_cache, other_dex_pc); |
| if (other_ic_it.second.is_missing_types) { |
| dex_pc_data->SetIsMissingTypes(); |
| } else if (other_ic_it.second.is_megamorphic) { |
| dex_pc_data->SetIsMegamorphic(); |
| } else { |
| for (const auto& class_it : other_class_set) { |
| dex_pc_data->AddClass(dex_profile_index_remap.Get( |
| class_it.dex_profile_index), class_it.type_index); |
| } |
| } |
| } |
| } |
| |
| // Merge the method bitmaps. |
| dex_data->MergeBitmap(*other_dex_data); |
| } |
| return true; |
| } |
| |
| const ProfileCompilationInfo::DexFileData* ProfileCompilationInfo::FindDexData( |
| const DexFile* dex_file) const { |
| return FindDexData(GetProfileDexFileKey(dex_file->GetLocation()), |
| dex_file->GetLocationChecksum()); |
| } |
| |
| ProfileCompilationInfo::MethodHotness ProfileCompilationInfo::GetMethodHotness( |
| const MethodReference& method_ref) const { |
| const DexFileData* dex_data = FindDexData(method_ref.dex_file); |
| return dex_data != nullptr |
| ? dex_data->GetHotnessInfo(method_ref.dex_method_index) |
| : MethodHotness(); |
| } |
| |
| bool ProfileCompilationInfo::AddMethodHotness(const MethodReference& method_ref, |
| const MethodHotness& hotness) { |
| DexFileData* dex_data = GetOrAddDexFileData(method_ref.dex_file); |
| if (dex_data != nullptr) { |
| // TODO: Add inline caches. |
| dex_data->AddMethod(static_cast<MethodHotness::Flag>(hotness.GetFlags()), |
| method_ref.dex_method_index); |
| return true; |
| } |
| return false; |
| } |
| |
| ProfileCompilationInfo::MethodHotness ProfileCompilationInfo::GetMethodHotness( |
| const std::string& dex_location, |
| uint32_t dex_checksum, |
| uint16_t dex_method_index) const { |
| const DexFileData* dex_data = FindDexData(GetProfileDexFileKey(dex_location), dex_checksum); |
| return dex_data != nullptr ? dex_data->GetHotnessInfo(dex_method_index) : MethodHotness(); |
| } |
| |
| |
| std::unique_ptr<ProfileCompilationInfo::OfflineProfileMethodInfo> ProfileCompilationInfo::GetMethod( |
| const std::string& dex_location, |
| uint32_t dex_checksum, |
| uint16_t dex_method_index) const { |
| MethodHotness hotness(GetMethodHotness(dex_location, dex_checksum, dex_method_index)); |
| if (!hotness.IsHot()) { |
| return nullptr; |
| } |
| const InlineCacheMap* inline_caches = hotness.GetInlineCacheMap(); |
| DCHECK(inline_caches != nullptr); |
| std::unique_ptr<OfflineProfileMethodInfo> pmi(new OfflineProfileMethodInfo(inline_caches)); |
| |
| pmi->dex_references.resize(info_.size()); |
| for (const DexFileData* dex_data : info_) { |
| pmi->dex_references[dex_data->profile_index].dex_location = dex_data->profile_key; |
| pmi->dex_references[dex_data->profile_index].dex_checksum = dex_data->checksum; |
| pmi->dex_references[dex_data->profile_index].num_method_ids = dex_data->num_method_ids; |
| } |
| |
| return pmi; |
| } |
| |
| |
| bool ProfileCompilationInfo::ContainsClass(const DexFile& dex_file, dex::TypeIndex type_idx) const { |
| const DexFileData* dex_data = FindDexData(&dex_file); |
| if (dex_data != nullptr) { |
| const ArenaSet<dex::TypeIndex>& classes = dex_data->class_set; |
| return classes.find(type_idx) != classes.end(); |
| } |
| return false; |
| } |
| |
| uint32_t ProfileCompilationInfo::GetNumberOfMethods() const { |
| uint32_t total = 0; |
| for (const DexFileData* dex_data : info_) { |
| total += dex_data->method_map.size(); |
| } |
| return total; |
| } |
| |
| uint32_t ProfileCompilationInfo::GetNumberOfResolvedClasses() const { |
| uint32_t total = 0; |
| for (const DexFileData* dex_data : info_) { |
| total += dex_data->class_set.size(); |
| } |
| return total; |
| } |
| |
| // Produce a non-owning vector from a vector. |
| template<typename T> |
| const std::vector<T*>* MakeNonOwningVector(const std::vector<std::unique_ptr<T>>* owning_vector) { |
| auto non_owning_vector = new std::vector<T*>(); |
| for (auto& element : *owning_vector) { |
| non_owning_vector->push_back(element.get()); |
| } |
| return non_owning_vector; |
| } |
| |
| std::string ProfileCompilationInfo::DumpInfo( |
| const std::vector<std::unique_ptr<const DexFile>>* dex_files, |
| bool print_full_dex_location) const { |
| std::unique_ptr<const std::vector<const DexFile*>> non_owning_dex_files( |
| MakeNonOwningVector(dex_files)); |
| return DumpInfo(non_owning_dex_files.get(), print_full_dex_location); |
| } |
| |
| std::string ProfileCompilationInfo::DumpInfo(const std::vector<const DexFile*>* dex_files, |
| bool print_full_dex_location) const { |
| std::ostringstream os; |
| if (info_.empty()) { |
| return "ProfileInfo: empty"; |
| } |
| |
| os << "ProfileInfo:"; |
| |
| const std::string kFirstDexFileKeySubstitute = ":classes.dex"; |
| |
| for (const DexFileData* dex_data : info_) { |
| os << "\n"; |
| if (print_full_dex_location) { |
| os << dex_data->profile_key; |
| } else { |
| // Replace the (empty) multidex suffix of the first key with a substitute for easier reading. |
| std::string multidex_suffix = DexFile::GetMultiDexSuffix(dex_data->profile_key); |
| os << (multidex_suffix.empty() ? kFirstDexFileKeySubstitute : multidex_suffix); |
| } |
| os << " [index=" << static_cast<uint32_t>(dex_data->profile_index) << "]"; |
| const DexFile* dex_file = nullptr; |
| if (dex_files != nullptr) { |
| for (size_t i = 0; i < dex_files->size(); i++) { |
| if (dex_data->profile_key == (*dex_files)[i]->GetLocation()) { |
| dex_file = (*dex_files)[i]; |
| } |
| } |
| } |
| os << "\n\thot methods: "; |
| for (const auto& method_it : dex_data->method_map) { |
| if (dex_file != nullptr) { |
| os << "\n\t\t" << dex_file->PrettyMethod(method_it.first, true); |
| } else { |
| os << method_it.first; |
| } |
| |
| os << "["; |
| for (const auto& inline_cache_it : method_it.second) { |
| os << "{" << std::hex << inline_cache_it.first << std::dec << ":"; |
| if (inline_cache_it.second.is_missing_types) { |
| os << "MT"; |
| } else if (inline_cache_it.second.is_megamorphic) { |
| os << "MM"; |
| } else { |
| for (const ClassReference& class_ref : inline_cache_it.second.classes) { |
| os << "(" << static_cast<uint32_t>(class_ref.dex_profile_index) |
| << "," << class_ref.type_index.index_ << ")"; |
| } |
| } |
| os << "}"; |
| } |
| os << "], "; |
| } |
| bool startup = true; |
| while (true) { |
| os << "\n\t" << (startup ? "startup methods: " : "post startup methods: "); |
| for (uint32_t method_idx = 0; method_idx < dex_data->num_method_ids; ++method_idx) { |
| MethodHotness hotness_info(dex_data->GetHotnessInfo(method_idx)); |
| if (startup ? hotness_info.IsStartup() : hotness_info.IsPostStartup()) { |
| os << method_idx << ", "; |
| } |
| } |
| if (startup == false) { |
| break; |
| } |
| startup = false; |
| } |
| os << "\n\tclasses: "; |
| for (const auto class_it : dex_data->class_set) { |
| if (dex_file != nullptr) { |
| os << "\n\t\t" << dex_file->PrettyType(class_it); |
| } else { |
| os << class_it.index_ << ","; |
| } |
| } |
| } |
| return os.str(); |
| } |
| |
| bool ProfileCompilationInfo::GetClassesAndMethods( |
| const DexFile& dex_file, |
| /*out*/std::set<dex::TypeIndex>* class_set, |
| /*out*/std::set<uint16_t>* hot_method_set, |
| /*out*/std::set<uint16_t>* startup_method_set, |
| /*out*/std::set<uint16_t>* post_startup_method_method_set) const { |
| std::set<std::string> ret; |
| const DexFileData* dex_data = FindDexData(&dex_file); |
| if (dex_data == nullptr) { |
| return false; |
| } |
| for (const auto& it : dex_data->method_map) { |
| hot_method_set->insert(it.first); |
| } |
| for (uint32_t method_idx = 0; method_idx < dex_data->num_method_ids; ++method_idx) { |
| MethodHotness hotness = dex_data->GetHotnessInfo(method_idx); |
| if (hotness.IsStartup()) { |
| startup_method_set->insert(method_idx); |
| } |
| if (hotness.IsPostStartup()) { |
| post_startup_method_method_set->insert(method_idx); |
| } |
| } |
| for (const dex::TypeIndex& type_index : dex_data->class_set) { |
| class_set->insert(type_index); |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::Equals(const ProfileCompilationInfo& other) { |
| // No need to compare profile_key_map_. That's only a cache for fast search. |
| // All the information is already in the info_ vector. |
| if (info_.size() != other.info_.size()) { |
| return false; |
| } |
| for (size_t i = 0; i < info_.size(); i++) { |
| const DexFileData& dex_data = *info_[i]; |
| const DexFileData& other_dex_data = *other.info_[i]; |
| if (!(dex_data == other_dex_data)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| std::set<DexCacheResolvedClasses> ProfileCompilationInfo::GetResolvedClasses( |
| const std::vector<const DexFile*>& dex_files) const { |
| std::unordered_map<std::string, const DexFile* > key_to_dex_file; |
| for (const DexFile* dex_file : dex_files) { |
| key_to_dex_file.emplace(GetProfileDexFileKey(dex_file->GetLocation()), dex_file); |
| } |
| std::set<DexCacheResolvedClasses> ret; |
| for (const DexFileData* dex_data : info_) { |
| const auto it = key_to_dex_file.find(dex_data->profile_key); |
| if (it != key_to_dex_file.end()) { |
| const DexFile* dex_file = it->second; |
| const std::string& dex_location = dex_file->GetLocation(); |
| if (dex_data->checksum != it->second->GetLocationChecksum()) { |
| LOG(ERROR) << "Dex checksum mismatch when getting resolved classes from profile for " |
| << "location " << dex_location << " (checksum=" << dex_file->GetLocationChecksum() |
| << ", profile checksum=" << dex_data->checksum; |
| return std::set<DexCacheResolvedClasses>(); |
| } |
| DexCacheResolvedClasses classes(dex_location, |
| dex_location, |
| dex_data->checksum, |
| dex_data->num_method_ids); |
| classes.AddClasses(dex_data->class_set.begin(), dex_data->class_set.end()); |
| ret.insert(classes); |
| } |
| } |
| return ret; |
| } |
| |
| // Naive implementation to generate a random profile file suitable for testing. |
| bool ProfileCompilationInfo::GenerateTestProfile(int fd, |
| uint16_t number_of_dex_files, |
| uint16_t method_ratio, |
| uint16_t class_ratio, |
| uint32_t random_seed) { |
| const std::string base_dex_location = "base.apk"; |
| ProfileCompilationInfo info; |
| // The limits are defined by the dex specification. |
| const uint16_t max_method = std::numeric_limits<uint16_t>::max(); |
| const uint16_t max_classes = std::numeric_limits<uint16_t>::max(); |
| uint16_t number_of_methods = max_method * method_ratio / 100; |
| uint16_t number_of_classes = max_classes * class_ratio / 100; |
| |
| std::srand(random_seed); |
| |
| // Make sure we generate more samples with a low index value. |
| // This makes it more likely to hit valid method/class indices in small apps. |
| const uint16_t kFavorFirstN = 10000; |
| const uint16_t kFavorSplit = 2; |
| |
| for (uint16_t i = 0; i < number_of_dex_files; i++) { |
| std::string dex_location = DexFile::GetMultiDexLocation(i, base_dex_location.c_str()); |
| std::string profile_key = GetProfileDexFileKey(dex_location); |
| |
| for (uint16_t m = 0; m < number_of_methods; m++) { |
| uint16_t method_idx = rand() % max_method; |
| if (m < (number_of_methods / kFavorSplit)) { |
| method_idx %= kFavorFirstN; |
| } |
| info.AddMethodIndex(MethodHotness::kFlagHot, |
| profile_key, |
| /*method_idx*/ 0, |
| method_idx, |
| max_method); |
| } |
| |
| for (uint16_t c = 0; c < number_of_classes; c++) { |
| uint16_t type_idx = rand() % max_classes; |
| if (c < (number_of_classes / kFavorSplit)) { |
| type_idx %= kFavorFirstN; |
| } |
| info.AddClassIndex(profile_key, 0, dex::TypeIndex(type_idx), max_method); |
| } |
| } |
| return info.Save(fd); |
| } |
| |
| // Naive implementation to generate a random profile file suitable for testing. |
| bool ProfileCompilationInfo::GenerateTestProfile( |
| int fd, |
| std::vector<std::unique_ptr<const DexFile>>& dex_files, |
| uint32_t random_seed) { |
| std::srand(random_seed); |
| ProfileCompilationInfo info; |
| for (std::unique_ptr<const DexFile>& dex_file : dex_files) { |
| const std::string& location = dex_file->GetLocation(); |
| uint32_t checksum = dex_file->GetLocationChecksum(); |
| for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { |
| // Randomly add a class from the dex file (with 50% chance). |
| if (std::rand() % 2 != 0) { |
| info.AddClassIndex(location, |
| checksum, |
| dex_file->GetClassDef(i).class_idx_, |
| dex_file->NumMethodIds()); |
| } |
| } |
| for (uint32_t i = 0; i < dex_file->NumMethodIds(); ++i) { |
| // Randomly add a method from the dex file (with 50% chance). |
| if (std::rand() % 2 != 0) { |
| info.AddMethodIndex(MethodHotness::kFlagHot, MethodReference(dex_file.get(), i)); |
| } |
| } |
| } |
| return info.Save(fd); |
| } |
| |
| bool ProfileCompilationInfo::OfflineProfileMethodInfo::operator==( |
| const OfflineProfileMethodInfo& other) const { |
| if (inline_caches->size() != other.inline_caches->size()) { |
| return false; |
| } |
| |
| // We can't use a simple equality test because we need to match the dex files |
| // of the inline caches which might have different profile indexes. |
| for (const auto& inline_cache_it : *inline_caches) { |
| uint16_t dex_pc = inline_cache_it.first; |
| const DexPcData dex_pc_data = inline_cache_it.second; |
| const auto& other_it = other.inline_caches->find(dex_pc); |
| if (other_it == other.inline_caches->end()) { |
| return false; |
| } |
| const DexPcData& other_dex_pc_data = other_it->second; |
| if (dex_pc_data.is_megamorphic != other_dex_pc_data.is_megamorphic || |
| dex_pc_data.is_missing_types != other_dex_pc_data.is_missing_types) { |
| return false; |
| } |
| for (const ClassReference& class_ref : dex_pc_data.classes) { |
| bool found = false; |
| for (const ClassReference& other_class_ref : other_dex_pc_data.classes) { |
| CHECK_LE(class_ref.dex_profile_index, dex_references.size()); |
| CHECK_LE(other_class_ref.dex_profile_index, other.dex_references.size()); |
| const DexReference& dex_ref = dex_references[class_ref.dex_profile_index]; |
| const DexReference& other_dex_ref = other.dex_references[other_class_ref.dex_profile_index]; |
| if (class_ref.type_index == other_class_ref.type_index && |
| dex_ref == other_dex_ref) { |
| found = true; |
| break; |
| } |
| } |
| if (!found) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::IsEmpty() const { |
| DCHECK_EQ(info_.empty(), profile_key_map_.empty()); |
| return info_.empty(); |
| } |
| |
| ProfileCompilationInfo::InlineCacheMap* |
| ProfileCompilationInfo::DexFileData::FindOrAddMethod(uint16_t method_index) { |
| return &(method_map.FindOrAdd( |
| method_index, |
| InlineCacheMap(std::less<uint16_t>(), arena_->Adapter(kArenaAllocProfile)))->second); |
| } |
| |
| // Mark a method as executed at least once. |
| void ProfileCompilationInfo::DexFileData::AddMethod(MethodHotness::Flag flags, size_t index) { |
| if ((flags & MethodHotness::kFlagStartup) != 0) { |
| method_bitmap.StoreBit(MethodBitIndex(/*startup*/ true, index), /*value*/ true); |
| } |
| if ((flags & MethodHotness::kFlagPostStartup) != 0) { |
| method_bitmap.StoreBit(MethodBitIndex(/*startup*/ false, index), /*value*/ true); |
| } |
| if ((flags & MethodHotness::kFlagHot) != 0) { |
| method_map.FindOrAdd( |
| index, |
| InlineCacheMap(std::less<uint16_t>(), arena_->Adapter(kArenaAllocProfile))); |
| } |
| } |
| |
| ProfileCompilationInfo::MethodHotness ProfileCompilationInfo::DexFileData::GetHotnessInfo( |
| uint32_t dex_method_index) const { |
| MethodHotness ret; |
| if (method_bitmap.LoadBit(MethodBitIndex(/*startup*/ true, dex_method_index))) { |
| ret.AddFlag(MethodHotness::kFlagStartup); |
| } |
| if (method_bitmap.LoadBit(MethodBitIndex(/*startup*/ false, dex_method_index))) { |
| ret.AddFlag(MethodHotness::kFlagPostStartup); |
| } |
| auto it = method_map.find(dex_method_index); |
| if (it != method_map.end()) { |
| ret.SetInlineCacheMap(&it->second); |
| ret.AddFlag(MethodHotness::kFlagHot); |
| } |
| return ret; |
| } |
| |
| ProfileCompilationInfo::DexPcData* |
| ProfileCompilationInfo::FindOrAddDexPc(InlineCacheMap* inline_cache, uint32_t dex_pc) { |
| return &(inline_cache->FindOrAdd(dex_pc, DexPcData(&arena_))->second); |
| } |
| |
| } // namespace art |