Rename offline_profiling_info to profile_compilation_info
This solves a long standing TODO to align the names of the files and the
class.
Bug: 32434870
Test: test-art-host
Change-Id: I2707da8fef8736a7223189d894fc00ff11bfab12
diff --git a/runtime/jit/profile_compilation_info.cc b/runtime/jit/profile_compilation_info.cc
new file mode 100644
index 0000000..1405c40
--- /dev/null
+++ b/runtime/jit/profile_compilation_info.cc
@@ -0,0 +1,715 @@
+/*
+ * 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' };
+const uint8_t ProfileCompilationInfo::kProfileVersion[] = { '0', '0', '2', '\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;
+
+// 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<MethodReference>& methods,
+ const std::set<DexCacheResolvedClasses>& resolved_classes) {
+ for (const MethodReference& method : methods) {
+ if (!AddMethodIndex(GetProfileDexFileKey(method.dex_file->GetLocation()),
+ method.dex_file->GetLocationChecksum(),
+ method.dex_method_index)) {
+ 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 =
+ 3 * sizeof(uint16_t) + // method_set.size + class_set.size + dex_location.size
+ sizeof(uint32_t); // checksum
+
+/**
+ * Serialization format:
+ * magic,version,number_of_lines
+ * dex_location1,number_of_methods1,number_of_classes1,dex_location_checksum1, \
+ * method_id11,method_id12...,class_id1,class_id2...
+ * dex_location2,number_of_methods2,number_of_classes2,dex_location_checksum2, \
+ * method_id21,method_id22...,,class_id1,class_id2...
+ * .....
+ **/
+bool ProfileCompilationInfo::Save(int fd) {
+ ScopedTrace trace(__PRETTY_FUNCTION__);
+ DCHECK_GE(fd, 0);
+
+ // Cache at most 5KB before writing.
+ static constexpr size_t kMaxSizeToKeepBeforeWriting = 5 * 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));
+ AddUintToBuffer(&buffer, static_cast<uint16_t>(info_.size()));
+
+ for (const auto& it : info_) {
+ if (buffer.size() > kMaxSizeToKeepBeforeWriting) {
+ if (!WriteBuffer(fd, buffer.data(), buffer.size())) {
+ return false;
+ }
+ buffer.clear();
+ }
+ const std::string& dex_location = it.first;
+ const DexFileData& dex_data = it.second;
+ if (dex_data.method_set.empty() && dex_data.class_set.empty()) {
+ continue;
+ }
+
+ 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.
+ size_t required_capacity = buffer.size() +
+ kLineHeaderSize +
+ dex_location.size() +
+ sizeof(uint16_t) * (dex_data.class_set.size() + dex_data.method_set.size());
+
+ buffer.reserve(required_capacity);
+
+ DCHECK_LE(dex_location.size(), std::numeric_limits<uint16_t>::max());
+ DCHECK_LE(dex_data.method_set.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.method_set.size()));
+ AddUintToBuffer(&buffer, static_cast<uint16_t>(dex_data.class_set.size()));
+ AddUintToBuffer(&buffer, dex_data.checksum); // uint32_t
+
+ AddStringToBuffer(&buffer, dex_location);
+
+ for (auto method_it : dex_data.method_set) {
+ AddUintToBuffer(&buffer, method_it);
+ }
+ for (auto class_id : dex_data.class_set) {
+ AddUintToBuffer(&buffer, class_id.index_);
+ }
+ DCHECK_EQ(required_capacity, buffer.size())
+ << "Failed to add the expected number of bytes in the buffer";
+ }
+
+ return WriteBuffer(fd, buffer.data(), buffer.size());
+}
+
+ProfileCompilationInfo::DexFileData* ProfileCompilationInfo::GetOrAddDexFileData(
+ const std::string& dex_location,
+ uint32_t checksum) {
+ auto info_it = info_.find(dex_location);
+ if (info_it == info_.end()) {
+ info_it = info_.Put(dex_location, DexFileData(checksum));
+ }
+ 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 checksum,
+ uint16_t method_idx) {
+ DexFileData* const data = GetOrAddDexFileData(dex_location, checksum);
+ if (data == nullptr) {
+ return false;
+ }
+ data->method_set.insert(method_idx);
+ 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;
+}
+
+bool ProfileCompilationInfo::ProcessLine(SafeBuffer& line_buffer,
+ uint16_t method_set_size,
+ uint16_t class_set_size,
+ uint32_t checksum,
+ const std::string& dex_location) {
+ for (uint16_t i = 0; i < method_set_size; i++) {
+ uint16_t method_idx = line_buffer.ReadUintAndAdvance<uint16_t>();
+ if (!AddMethodIndex(dex_location, checksum, method_idx)) {
+ return false;
+ }
+ }
+
+ for (uint16_t i = 0; i < class_set_size; i++) {
+ uint16_t type_idx = line_buffer.ReadUintAndAdvance<uint16_t>();
+ if (!AddClassIndex(dex_location, checksum, dex::TypeIndex(type_idx))) {
+ 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>
+T ProfileCompilationInfo::SafeBuffer::ReadUintAndAdvance() {
+ static_assert(std::is_unsigned<T>::value, "Type is not unsigned");
+ CHECK_LE(ptr_current_ + sizeof(T), ptr_end_);
+ T value = 0;
+ for (size_t i = 0; i < sizeof(T); i++) {
+ value += ptr_current_[i] << (i * kBitsPerByte);
+ }
+ ptr_current_ += sizeof(T);
+ return value;
+}
+
+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_;
+ 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*/uint16_t* number_of_lines,
+ /*out*/std::string* error) {
+ // Read magic and version
+ const size_t kMagicVersionSize =
+ sizeof(kProfileMagic) +
+ sizeof(kProfileVersion) +
+ sizeof(uint16_t); // number of lines
+
+ 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;
+ }
+ *number_of_lines = safe_buffer.ReadUintAndAdvance<uint16_t>();
+ return kProfileLoadSuccess;
+}
+
+ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileLineHeader(
+ int fd,
+ /*out*/ProfileLineHeader* line_header,
+ /*out*/std::string* error) {
+ SafeBuffer header_buffer(kLineHeaderSize);
+ ProfileLoadSatus status = header_buffer.FillFromFd(fd, "ReadProfileHeader", error);
+ if (status != kProfileLoadSuccess) {
+ return status;
+ }
+
+ uint16_t dex_location_size = header_buffer.ReadUintAndAdvance<uint16_t>();
+ line_header->method_set_size = header_buffer.ReadUintAndAdvance<uint16_t>();
+ line_header->class_set_size = header_buffer.ReadUintAndAdvance<uint16_t>();
+ line_header->checksum = header_buffer.ReadUintAndAdvance<uint32_t>();
+
+ 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,
+ const ProfileLineHeader& line_header,
+ /*out*/std::string* error) {
+ // Make sure that we don't try to read everything in memory (in case the profile if full).
+ // Split readings in chunks of at most 10kb.
+ static constexpr uint16_t kMaxNumberOfEntriesToRead = 5120;
+ uint16_t methods_left_to_read = line_header.method_set_size;
+ uint16_t classes_left_to_read = line_header.class_set_size;
+
+ while ((methods_left_to_read > 0) || (classes_left_to_read > 0)) {
+ uint16_t methods_to_read = std::min(kMaxNumberOfEntriesToRead, methods_left_to_read);
+ uint16_t max_classes_to_read = kMaxNumberOfEntriesToRead - methods_to_read;
+ uint16_t classes_to_read = std::min(max_classes_to_read, classes_left_to_read);
+
+ size_t line_size = sizeof(uint16_t) * (methods_to_read + classes_to_read);
+ SafeBuffer line_buffer(line_size);
+
+ ProfileLoadSatus status = line_buffer.FillFromFd(fd, "ReadProfileLine", error);
+ if (status != kProfileLoadSuccess) {
+ return status;
+ }
+ if (!ProcessLine(line_buffer,
+ methods_to_read,
+ classes_to_read,
+ line_header.checksum,
+ line_header.dex_location)) {
+ *error = "Error when reading profile file line";
+ return kProfileLoadBadData;
+ }
+ methods_left_to_read -= methods_to_read;
+ classes_left_to_read -= classes_to_read;
+ }
+ return kProfileLoadSuccess;
+}
+
+bool ProfileCompilationInfo::Load(int fd) {
+ std::string error;
+ ProfileLoadSatus status = LoadInternal(fd, &error);
+
+ if (status == kProfileLoadSuccess) {
+ return true;
+ } else {
+ PLOG(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_lines.
+ uint16_t number_of_lines;
+ ProfileLoadSatus status = ReadProfileHeader(fd, &number_of_lines, error);
+ if (status != kProfileLoadSuccess) {
+ return status;
+ }
+
+ while (number_of_lines > 0) {
+ 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, line_header, error);
+ if (status != kProfileLoadSuccess) {
+ return status;
+ }
+ number_of_lines--;
+ }
+
+ // 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.
+ 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);
+ if (info_it == info_.end()) {
+ info_it = info_.Put(other_dex_location, DexFileData(other_dex_data.checksum));
+ }
+ info_it->second.method_set.insert(other_dex_data.method_set.begin(),
+ other_dex_data.method_set.end());
+ info_it->second.class_set.insert(other_dex_data.class_set.begin(),
+ other_dex_data.class_set.end());
+ }
+ return true;
+}
+
+static bool ChecksumMatch(const DexFile& dex_file, uint32_t checksum) {
+ return kDebugIgnoreChecksum || dex_file.GetLocationChecksum() == checksum;
+}
+
+bool ProfileCompilationInfo::ContainsMethod(const MethodReference& method_ref) const {
+ auto info_it = info_.find(GetProfileDexFileKey(method_ref.dex_file->GetLocation()));
+ if (info_it != info_.end()) {
+ if (!ChecksumMatch(*method_ref.dex_file, info_it->second.checksum)) {
+ return false;
+ }
+ const std::set<uint16_t>& methods = info_it->second.method_set;
+ return methods.find(method_ref.dex_method_index) != methods.end();
+ }
+ return false;
+}
+
+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_set.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;
+}
+
+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 auto& it : info_) {
+ os << "\n";
+ const std::string& location = it.first;
+ const DexFileData& dex_data = it.second;
+ 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);
+ }
+ 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_set) {
+ if (dex_file != nullptr) {
+ os << "\n\t\t" << dex_file->PrettyMethod(method_it, true);
+ } else {
+ os << method_it << ",";
+ }
+ }
+ 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 << ",";
+ }
+ }
+ }
+ return os.str();
+}
+
+bool ProfileCompilationInfo::Equals(const ProfileCompilationInfo& other) {
+ return info_.Equals(other.info_);
+}
+
+std::set<DexCacheResolvedClasses> ProfileCompilationInfo::GetResolvedClasses() const {
+ std::set<DexCacheResolvedClasses> ret;
+ for (auto&& pair : info_) {
+ const std::string& profile_key = pair.first;
+ const DexFileData& data = pair.second;
+ // TODO: Is it OK to use the same location for both base and dex location here?
+ DexCacheResolvedClasses classes(profile_key, profile_key, 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);
+}
+
+} // namespace art