| /* |
| * 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 <vector> |
| #include <stdlib.h> |
| #include <sys/file.h> |
| #include <sys/stat.h> |
| #include <sys/uio.h> |
| |
| #include "art_method-inl.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" |
| |
| namespace art { |
| |
| const uint8_t ProfileCompilationInfo::kProfileMagic[] = { 'p', 'r', 'o', '\0' }; |
| // Last profile version: fix the order of dex files in the profile. |
| const uint8_t ProfileCompilationInfo::kProfileVersion[] = { '0', '0', '4', '\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"); |
| |
| void ProfileCompilationInfo::DexPcData::AddClass(uint16_t dex_profile_idx, |
| const dex::TypeIndex& type_idx) { |
| if (is_megamorphic || is_missing_types) { |
| return; |
| } |
| classes.emplace(dex_profile_idx, type_idx); |
| if (classes.size() >= InlineCache::kIndividualCacheSize) { |
| is_megamorphic = true; |
| classes.clear(); |
| } |
| } |
| |
| // 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::AddMethodsAndClasses( |
| const std::vector<ProfileMethodInfo>& methods, |
| const std::set<DexCacheResolvedClasses>& resolved_classes) { |
| for (const ProfileMethodInfo& method : methods) { |
| if (!AddMethod(method)) { |
| return false; |
| } |
| } |
| for (const DexCacheResolvedClasses& dex_cache : resolved_classes) { |
| if (!AddResolvedClasses(dex_cache)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::MergeAndSave(const std::string& filename, |
| uint64_t* bytes_written, |
| bool force) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| ScopedFlock flock; |
| std::string error; |
| if (!flock.Init(filename.c_str(), O_RDWR | O_NOFOLLOW | O_CLOEXEC, /* block */ false, &error)) { |
| LOG(WARNING) << "Couldn't lock the profile file " << filename << ": " << error; |
| return false; |
| } |
| |
| int fd = flock.GetFile()->Fd(); |
| |
| // Load the file but keep a copy around to be able to infer if the content has changed. |
| ProfileCompilationInfo fileInfo; |
| ProfileLoadSatus status = fileInfo.LoadInternal(fd, &error); |
| if (status == kProfileLoadSuccess) { |
| // Merge the content of file into the current object. |
| if (MergeWith(fileInfo)) { |
| // If after the merge we have the same data as what is the file there's no point |
| // in actually doing the write. The file will be exactly the same as before. |
| if (Equals(fileInfo)) { |
| if (bytes_written != nullptr) { |
| *bytes_written = 0; |
| } |
| return true; |
| } |
| } else { |
| LOG(WARNING) << "Could not merge previous profile data from file " << filename; |
| if (!force) { |
| return false; |
| } |
| } |
| } else if (force && |
| ((status == kProfileLoadVersionMismatch) || (status == kProfileLoadBadData))) { |
| // Log a warning but don't return false. We will clear the profile anyway. |
| LOG(WARNING) << "Clearing bad or obsolete profile data from file " |
| << filename << ": " << error; |
| } else { |
| LOG(WARNING) << "Could not load profile data from file " << filename << ": " << error; |
| return false; |
| } |
| |
| // We need to clear the data because we don't support appending to the profiles yet. |
| if (!flock.GetFile()->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) { |
| VLOG(profiler) << "Successfully saved profile info to " << filename |
| << " Size: " << GetFileSizeBytes(filename); |
| if (bytes_written != nullptr) { |
| *bytes_written = GetFileSizeBytes(filename); |
| } |
| } 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 |
| 2 * sizeof(uint32_t); // method_map.size + checksum |
| |
| /** |
| * Serialization format: |
| * magic,version,number_of_dex_files |
| * dex_location1,number_of_classes1,methods_region_size,dex_location_checksum1, \ |
| * method_encoding_11,method_encoding_12...,class_id1,class_id2... |
| * dex_location2,number_of_classes2,methods_region_size,dex_location_checksum2, \ |
| * method_encoding_21,method_encoding_22...,,class_id1,class_id2... |
| * ..... |
| * 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) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| DCHECK_GE(fd, 0); |
| |
| // Cache at most 50KB before writing. |
| static constexpr size_t kMaxSizeToKeepBeforeWriting = 50 * KB; |
| // Use a vector wrapper to avoid keeping track of offsets when we add elements. |
| std::vector<uint8_t> buffer; |
| WriteBuffer(fd, kProfileMagic, sizeof(kProfileMagic)); |
| WriteBuffer(fd, kProfileVersion, sizeof(kProfileVersion)); |
| DCHECK_LE(info_.size(), std::numeric_limits<uint8_t>::max()); |
| AddUintToBuffer(&buffer, static_cast<uint8_t>(info_.size())); |
| |
| // Make sure we write the dex files in order of their profile index. This |
| // avoids writing the index in the output file and simplifies the parsing logic. |
| std::vector<const std::string*> ordered_info_location(info_.size()); |
| std::vector<const DexFileData*> ordered_info_data(info_.size()); |
| for (const auto& it : info_) { |
| ordered_info_location[it.second.profile_index] = &(it.first); |
| ordered_info_data[it.second.profile_index] = &(it.second); |
| } |
| for (size_t i = 0; i < info_.size(); i++) { |
| if (buffer.size() > kMaxSizeToKeepBeforeWriting) { |
| if (!WriteBuffer(fd, buffer.data(), buffer.size())) { |
| return false; |
| } |
| buffer.clear(); |
| } |
| const std::string& dex_location = *ordered_info_location[i]; |
| const DexFileData& dex_data = *ordered_info_data[i]; |
| |
| // Note that we allow dex files without any methods or classes, so that |
| // inline caches can refer valid dex files. |
| |
| if (dex_location.size() >= kMaxDexFileKeyLength) { |
| LOG(WARNING) << "DexFileKey exceeds allocated limit"; |
| return false; |
| } |
| |
| // Make sure that the buffer has enough capacity to avoid repeated resizings |
| // while we add data. |
| uint32_t methods_region_size = GetMethodsRegionSize(dex_data); |
| size_t required_capacity = buffer.size() + |
| kLineHeaderSize + |
| dex_location.size() + |
| sizeof(uint16_t) * dex_data.class_set.size() + |
| methods_region_size; |
| |
| buffer.reserve(required_capacity); |
| DCHECK_LE(dex_location.size(), std::numeric_limits<uint16_t>::max()); |
| DCHECK_LE(dex_data.class_set.size(), std::numeric_limits<uint16_t>::max()); |
| AddUintToBuffer(&buffer, static_cast<uint16_t>(dex_location.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 |
| |
| AddStringToBuffer(&buffer, dex_location); |
| |
| for (const auto& method_it : dex_data.method_map) { |
| AddUintToBuffer(&buffer, method_it.first); |
| AddInlineCacheToBuffer(&buffer, method_it.second); |
| } |
| for (const auto& class_id : dex_data.class_set) { |
| AddUintToBuffer(&buffer, class_id.index_); |
| } |
| |
| DCHECK_LE(required_capacity, buffer.size()) |
| << "Failed to add the expected number of bytes in the buffer"; |
| } |
| |
| return WriteBuffer(fd, buffer.data(), buffer.size()); |
| } |
| |
| 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& dex_location, |
| uint32_t checksum) { |
| auto info_it = info_.FindOrAdd(dex_location, DexFileData(checksum, info_.size())); |
| if (info_.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(WARNING) << "Exceeded the maximum number of dex files (255). Something went wrong"; |
| } |
| info_.erase(dex_location); |
| return nullptr; |
| } |
| if (info_it->second.checksum != checksum) { |
| LOG(WARNING) << "Checksum mismatch for dex " << dex_location; |
| return nullptr; |
| } |
| return &info_it->second; |
| } |
| |
| 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); |
| if (data == nullptr) { |
| return false; |
| } |
| data->class_set.insert(classes.GetClasses().begin(), classes.GetClasses().end()); |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::AddMethodIndex(const std::string& dex_location, |
| uint32_t dex_checksum, |
| uint16_t method_index) { |
| return AddMethod(dex_location, dex_checksum, method_index, OfflineProfileMethodInfo()); |
| } |
| |
| bool ProfileCompilationInfo::AddMethod(const std::string& dex_location, |
| uint32_t dex_checksum, |
| uint16_t method_index, |
| const OfflineProfileMethodInfo& pmi) { |
| DexFileData* const data = GetOrAddDexFileData( |
| GetProfileDexFileKey(dex_location), |
| dex_checksum); |
| if (data == nullptr) { // checksum mismatch |
| return false; |
| } |
| auto inline_cache_it = data->method_map.FindOrAdd(method_index); |
| 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 = inline_cache_it->second.FindOrAdd(pmi_ic_dex_pc)->second; |
| 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); |
| 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( |
| GetProfileDexFileKey(pmi.dex_file->GetLocation()), |
| pmi.dex_file->GetLocationChecksum()); |
| if (data == nullptr) { // checksum mismatch |
| return false; |
| } |
| auto inline_cache_it = data->method_map.FindOrAdd(pmi.dex_method_index); |
| |
| for (const ProfileMethodInfo::ProfileInlineCache& cache : pmi.inline_caches) { |
| if (cache.is_missing_types) { |
| auto dex_pc_data_it = inline_cache_it->second.FindOrAdd(cache.dex_pc); |
| dex_pc_data_it->second.SetIsMissingTypes(); |
| continue; |
| } |
| for (const ProfileMethodInfo::ProfileClassReference& class_ref : cache.classes) { |
| DexFileData* class_dex_data = GetOrAddDexFileData( |
| GetProfileDexFileKey(class_ref.dex_file->GetLocation()), |
| class_ref.dex_file->GetLocationChecksum()); |
| if (class_dex_data == nullptr) { // checksum mismatch |
| return false; |
| } |
| auto dex_pc_data_it = inline_cache_it->second.FindOrAdd(cache.dex_pc); |
| if (dex_pc_data_it->second.is_missing_types) { |
| // Don't bother adding classes if we are missing types. |
| break; |
| } |
| dex_pc_data_it->second.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) { |
| DexFileData* const data = GetOrAddDexFileData(dex_location, checksum); |
| 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); |
| auto dex_pc_data_it = inline_cache->FindOrAdd(dex_pc); |
| if (dex_to_classes_map_size == kIsMissingTypesEncoding) { |
| dex_pc_data_it->second.SetIsMissingTypes(); |
| continue; |
| } |
| if (dex_to_classes_map_size == kIsMegamorphicEncoding) { |
| dex_pc_data_it->second.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_it->second.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) { |
| while (buffer.HasMoreData()) { |
| DexFileData* const data = GetOrAddDexFileData(line_header.dex_location, line_header.checksum); |
| uint16_t method_index; |
| READ_UINT(uint16_t, buffer, method_index, error); |
| |
| auto it = data->method_map.FindOrAdd(method_index); |
| if (!ReadInlineCache(buffer, number_of_dex_files, &(it->second), error)) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool ProfileCompilationInfo::ReadClasses(SafeBuffer& buffer, |
| uint16_t classes_to_read, |
| const ProfileLineHeader& line_header, |
| /*out*/std::string* error) { |
| for (uint16_t i = 0; i < classes_to_read; i++) { |
| uint16_t type_index; |
| READ_UINT(uint16_t, buffer, type_index, error); |
| if (!AddClassIndex(line_header.dex_location, |
| line_header.checksum, |
| dex::TypeIndex(type_index))) { |
| 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; |
| } |
| |
| bool ProfileCompilationInfo::SafeBuffer::HasMoreData() { |
| return ptr_current_ < ptr_end_; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::SafeBuffer::FillFromFd( |
| int fd, |
| const std::string& source, |
| /*out*/std::string* error) { |
| size_t byte_count = ptr_end_ - 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; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileHeader( |
| int fd, |
| /*out*/uint8_t* number_of_dex_files, |
| /*out*/std::string* error) { |
| // Read magic and version |
| const size_t kMagicVersionSize = |
| sizeof(kProfileMagic) + |
| sizeof(kProfileVersion) + |
| sizeof(uint8_t); // number of dex files |
| |
| 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; |
| } |
| 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); |
| return true; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileLineHeader( |
| int fd, |
| /*out*/ProfileLineHeader* line_header, |
| /*out*/std::string* error) { |
| SafeBuffer header_buffer(kLineHeaderSize); |
| ProfileLoadSatus status = header_buffer.FillFromFd(fd, "ReadProfileLineHeader", error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| |
| uint16_t dex_location_size; |
| if (!ReadProfileLineHeaderElements(header_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; |
| } |
| |
| SafeBuffer location_buffer(dex_location_size); |
| status = location_buffer.FillFromFd(fd, "ReadProfileHeaderDexLocation", error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| line_header->dex_location.assign( |
| reinterpret_cast<char*>(location_buffer.Get()), dex_location_size); |
| return kProfileLoadSuccess; |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileLine( |
| int fd, |
| uint8_t number_of_dex_files, |
| const ProfileLineHeader& line_header, |
| /*out*/std::string* error) { |
| if (GetOrAddDexFileData(line_header.dex_location, line_header.checksum) == nullptr) { |
| *error = "Error when reading profile file line header: checksum mismatch for " |
| + line_header.dex_location; |
| return kProfileLoadBadData; |
| } |
| |
| { |
| SafeBuffer buffer(line_header.method_region_size_bytes); |
| ProfileLoadSatus status = buffer.FillFromFd(fd, "ReadProfileLineMethods", error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| |
| if (!ReadMethods(buffer, number_of_dex_files, line_header, error)) { |
| return kProfileLoadBadData; |
| } |
| } |
| |
| { |
| SafeBuffer buffer(sizeof(uint16_t) * line_header.class_set_size); |
| ProfileLoadSatus status = buffer.FillFromFd(fd, "ReadProfileLineClasses", error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| if (!ReadClasses(buffer, line_header.class_set_size, line_header, error)) { |
| return kProfileLoadBadData; |
| } |
| } |
| |
| return kProfileLoadSuccess; |
| } |
| |
| 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; |
| } |
| } |
| |
| ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::LoadInternal( |
| int fd, std::string* error) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| DCHECK_GE(fd, 0); |
| |
| 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; |
| ProfileLoadSatus status = ReadProfileHeader(fd, &number_of_dex_files, error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| |
| 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(fd, &line_header, error); |
| if (status != kProfileLoadSuccess) { |
| return status; |
| } |
| |
| // Now read the actual profile line. |
| status = ReadProfileLine(fd, 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. |
| int result = testEOF(fd); |
| if (result == 0) { |
| return kProfileLoadSuccess; |
| } else if (result < 0) { |
| return kProfileLoadIOError; |
| } else { |
| *error = "Unexpected content in the profile file"; |
| return kProfileLoadBadData; |
| } |
| } |
| |
| bool ProfileCompilationInfo::MergeWith(const ProfileCompilationInfo& other) { |
| // 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 auto& other_it : other.info_) { |
| auto info_it = info_.find(other_it.first); |
| if ((info_it != info_.end()) && (info_it->second.checksum != other_it.second.checksum)) { |
| LOG(WARNING) << "Checksum mismatch for dex " << other_it.first; |
| 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 auto& other_it : other.info_) { |
| const std::string& other_dex_location = other_it.first; |
| uint32_t other_checksum = other_it.second.checksum; |
| const DexFileData& other_dex_data = other_it.second; |
| const DexFileData* dex_data = GetOrAddDexFileData(other_dex_location, other_checksum); |
| 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 auto& other_it : other.info_) { |
| const std::string& other_dex_location = other_it.first; |
| const DexFileData& other_dex_data = other_it.second; |
| auto info_it = info_.find(other_dex_location); |
| DCHECK(info_it != info_.end()); |
| |
| // Merge the classes. |
| info_it->second.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; |
| auto method_it = info_it->second.method_map.FindOrAdd(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; |
| auto class_set = method_it->second.FindOrAdd(other_dex_pc); |
| if (other_ic_it.second.is_missing_types) { |
| class_set->second.SetIsMissingTypes(); |
| } else if (other_ic_it.second.is_megamorphic) { |
| class_set->second.SetIsMegamorphic(); |
| } else { |
| for (const auto& class_it : other_class_set) { |
| class_set->second.AddClass(dex_profile_index_remap.Get( |
| class_it.dex_profile_index), class_it.type_index); |
| } |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| static bool ChecksumMatch(uint32_t dex_file_checksum, uint32_t checksum) { |
| return kDebugIgnoreChecksum || dex_file_checksum == checksum; |
| } |
| |
| static bool ChecksumMatch(const DexFile& dex_file, uint32_t checksum) { |
| return ChecksumMatch(dex_file.GetLocationChecksum(), checksum); |
| } |
| |
| bool ProfileCompilationInfo::ContainsMethod(const MethodReference& method_ref) const { |
| return FindMethod(method_ref.dex_file->GetLocation(), |
| method_ref.dex_file->GetLocationChecksum(), |
| method_ref.dex_method_index) != nullptr; |
| } |
| |
| const ProfileCompilationInfo::InlineCacheMap* |
| ProfileCompilationInfo::FindMethod(const std::string& dex_location, |
| uint32_t dex_checksum, |
| uint16_t dex_method_index) const { |
| auto info_it = info_.find(GetProfileDexFileKey(dex_location)); |
| if (info_it != info_.end()) { |
| if (!ChecksumMatch(dex_checksum, info_it->second.checksum)) { |
| return nullptr; |
| } |
| const MethodMap& methods = info_it->second.method_map; |
| const auto method_it = methods.find(dex_method_index); |
| return method_it == methods.end() ? nullptr : &(method_it->second); |
| } |
| return nullptr; |
| } |
| |
| void ProfileCompilationInfo::DexFileToProfileIndex( |
| /*out*/std::vector<DexReference>* dex_references) const { |
| dex_references->resize(info_.size()); |
| for (const auto& info_it : info_) { |
| DexReference& dex_ref = (*dex_references)[info_it.second.profile_index]; |
| dex_ref.dex_location = info_it.first; |
| dex_ref.dex_checksum = info_it.second.checksum; |
| } |
| } |
| |
| bool ProfileCompilationInfo::GetMethod(const std::string& dex_location, |
| uint32_t dex_checksum, |
| uint16_t dex_method_index, |
| /*out*/OfflineProfileMethodInfo* pmi) const { |
| const InlineCacheMap* inline_caches = FindMethod(dex_location, dex_checksum, dex_method_index); |
| if (inline_caches == nullptr) { |
| return false; |
| } |
| |
| DexFileToProfileIndex(&pmi->dex_references); |
| // TODO(calin): maybe expose a direct pointer to avoid copying |
| pmi->inline_caches = *inline_caches; |
| return true; |
| } |
| |
| |
| bool ProfileCompilationInfo::ContainsClass(const DexFile& dex_file, dex::TypeIndex type_idx) const { |
| auto info_it = info_.find(GetProfileDexFileKey(dex_file.GetLocation())); |
| if (info_it != info_.end()) { |
| if (!ChecksumMatch(dex_file, info_it->second.checksum)) { |
| return false; |
| } |
| const std::set<dex::TypeIndex>& classes = info_it->second.class_set; |
| return classes.find(type_idx) != classes.end(); |
| } |
| return false; |
| } |
| |
| uint32_t ProfileCompilationInfo::GetNumberOfMethods() const { |
| uint32_t total = 0; |
| for (const auto& it : info_) { |
| total += it.second.method_map.size(); |
| } |
| return total; |
| } |
| |
| uint32_t ProfileCompilationInfo::GetNumberOfResolvedClasses() const { |
| uint32_t total = 0; |
| for (const auto& it : info_) { |
| total += it.second.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"; |
| // Write the entries in profile index order. |
| std::vector<const std::string*> ordered_info_location(info_.size()); |
| std::vector<const DexFileData*> ordered_info_data(info_.size()); |
| for (const auto& it : info_) { |
| ordered_info_location[it.second.profile_index] = &(it.first); |
| ordered_info_data[it.second.profile_index] = &(it.second); |
| } |
| for (size_t profile_index = 0; profile_index < info_.size(); profile_index++) { |
| os << "\n"; |
| const std::string& location = *ordered_info_location[profile_index]; |
| const DexFileData& dex_data = *ordered_info_data[profile_index]; |
| if (print_full_dex_location) { |
| os << location; |
| } else { |
| // Replace the (empty) multidex suffix of the first key with a substitute for easier reading. |
| std::string multidex_suffix = DexFile::GetMultiDexSuffix(location); |
| 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 (location == (*dex_files)[i]->GetLocation()) { |
| dex_file = (*dex_files)[i]; |
| } |
| } |
| } |
| os << "\n\tmethods: "; |
| 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 << "], "; |
| } |
| 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(); |
| } |
| |
| void ProfileCompilationInfo::GetClassNames( |
| const std::vector<std::unique_ptr<const DexFile>>* dex_files, |
| std::set<std::string>* class_names) const { |
| std::unique_ptr<const std::vector<const DexFile*>> non_owning_dex_files( |
| MakeNonOwningVector(dex_files)); |
| GetClassNames(non_owning_dex_files.get(), class_names); |
| } |
| |
| void ProfileCompilationInfo::GetClassNames(const std::vector<const DexFile*>* dex_files, |
| std::set<std::string>* class_names) const { |
| if (info_.empty()) { |
| return; |
| } |
| for (const auto& it : info_) { |
| const std::string& location = it.first; |
| const DexFileData& dex_data = it.second; |
| const DexFile* dex_file = nullptr; |
| if (dex_files != nullptr) { |
| for (size_t i = 0; i < dex_files->size(); i++) { |
| if (location == GetProfileDexFileKey((*dex_files)[i]->GetLocation()) && |
| dex_data.checksum == (*dex_files)[i]->GetLocationChecksum()) { |
| dex_file = (*dex_files)[i]; |
| } |
| } |
| } |
| for (const auto class_it : dex_data.class_set) { |
| if (dex_file != nullptr) { |
| class_names->insert(std::string(dex_file->PrettyType(class_it))); |
| } |
| } |
| } |
| } |
| |
| bool ProfileCompilationInfo::Equals(const ProfileCompilationInfo& other) { |
| return info_.Equals(other.info_); |
| } |
| |
| std::set<DexCacheResolvedClasses> ProfileCompilationInfo::GetResolvedClasses( |
| const std::unordered_set<std::string>& dex_files_locations) const { |
| std::unordered_map<std::string, std::string> key_to_location_map; |
| for (const std::string& location : dex_files_locations) { |
| key_to_location_map.emplace(GetProfileDexFileKey(location), location); |
| } |
| std::set<DexCacheResolvedClasses> ret; |
| for (auto&& pair : info_) { |
| const std::string& profile_key = pair.first; |
| auto it = key_to_location_map.find(profile_key); |
| if (it != key_to_location_map.end()) { |
| const DexFileData& data = pair.second; |
| DexCacheResolvedClasses classes(it->second, it->second, data.checksum); |
| classes.AddClasses(data.class_set.begin(), data.class_set.end()); |
| ret.insert(classes); |
| } |
| } |
| return ret; |
| } |
| |
| void ProfileCompilationInfo::ClearResolvedClasses() { |
| for (auto& pair : info_) { |
| pair.second.class_set.clear(); |
| } |
| } |
| |
| // 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) { |
| const std::string base_dex_location = "base.apk"; |
| ProfileCompilationInfo info; |
| // The limits are defined by the dex specification. |
| uint16_t max_method = std::numeric_limits<uint16_t>::max(); |
| 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; |
| |
| srand(MicroTime()); |
| |
| // 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(profile_key, 0, method_idx); |
| } |
| |
| 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)); |
| } |
| } |
| 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; |
| } |
| |
| } // namespace art |