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/*
* Copyright (C) 2019 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 <stdio.h>
#include <memory>
#include <string>
#include "ETMDecoder.h"
#include "command.h"
#include "record_file.h"
#include "thread_tree.h"
#include "utils.h"
using namespace simpleperf;
namespace {
using AddrPair = std::pair<uint64_t, uint64_t>;
struct AddrPairHash {
size_t operator()(const AddrPair& ap) const noexcept {
size_t seed = 0;
HashCombine(seed, ap.first);
HashCombine(seed, ap.second);
return seed;
}
};
struct BinaryInfo {
std::unordered_map<AddrPair, uint64_t, AddrPairHash> range_count_map;
std::unordered_map<AddrPair, uint64_t, AddrPairHash> branch_count_map;
};
class InjectCommand : public Command {
public:
InjectCommand()
: Command("inject", "convert etm instruction tracing data into instr ranges",
// clang-format off
"Usage: simpleperf inject [options]\n"
"--binary binary_name Generate data only for binaries containing binary_name.\n"
"-i <file> input perf.data, generated by recording cs-etm event type.\n"
" Default is perf.data.\n"
"-o <file> output file. Default is perf_inject.data.\n"
" The output is in text format accepted by AutoFDO.\n"
"--dump-etm type1,type2,... Dump etm data. A type is one of raw, packet and element.\n"
"--symdir <dir> Look for binaries in a directory recursively.\n"
// clang-format on
),
output_fp_(nullptr, fclose) {}
bool Run(const std::vector<std::string>& args) override {
if (!ParseOptions(args)) {
return false;
}
record_file_reader_ = RecordFileReader::CreateInstance(input_filename_);
if (!record_file_reader_) {
return false;
}
record_file_reader_->LoadBuildIdAndFileFeatures(thread_tree_);
output_fp_.reset(fopen(output_filename_.c_str(), "w"));
if (!output_fp_) {
PLOG(ERROR) << "failed to write to " << output_filename_;
return false;
}
if (!record_file_reader_->ReadDataSection([this](auto r) { return ProcessRecord(r.get()); })) {
return false;
}
PostProcess();
output_fp_.reset(nullptr);
return true;
}
private:
bool ParseOptions(const std::vector<std::string>& args) {
for (size_t i = 0; i < args.size(); i++) {
if (args[i] == "--binary") {
if (!NextArgumentOrError(args, &i)) {
return false;
}
binary_name_filter_ = args[i];
} else if (args[i] == "-i") {
if (!NextArgumentOrError(args, &i)) {
return false;
}
input_filename_ = args[i];
} else if (args[i] == "-o") {
if (!NextArgumentOrError(args, &i)) {
return false;
}
output_filename_ = args[i];
} else if (args[i] == "--dump-etm") {
if (!NextArgumentOrError(args, &i) || !ParseEtmDumpOption(args[i], &etm_dump_option_)) {
return false;
}
} else if (args[i] == "--symdir") {
if (!NextArgumentOrError(args, &i) || !Dso::AddSymbolDir(args[i])) {
return false;
}
} else {
ReportUnknownOption(args, i);
return false;
}
}
return true;
}
bool ProcessRecord(Record* r) {
thread_tree_.Update(*r);
if (r->type() == PERF_RECORD_AUXTRACE_INFO) {
auto instr_range_callback = [this](auto& range) { ProcessInstrRange(range); };
etm_decoder_ = ETMDecoder::Create(*static_cast<AuxTraceInfoRecord*>(r), thread_tree_);
if (!etm_decoder_) {
return false;
}
etm_decoder_->EnableDump(etm_dump_option_);
etm_decoder_->RegisterCallback(instr_range_callback);
} else if (r->type() == PERF_RECORD_AUX) {
AuxRecord* aux = static_cast<AuxRecord*>(r);
uint64_t aux_size = aux->data->aux_size;
if (aux_size > 0) {
if (aux_data_buffer_.size() < aux_size) {
aux_data_buffer_.resize(aux_size);
}
if (!record_file_reader_->ReadAuxData(aux->Cpu(), aux->data->aux_offset,
aux_data_buffer_.data(), aux_size)) {
LOG(ERROR) << "failed to read aux data";
return false;
}
return etm_decoder_->ProcessData(aux_data_buffer_.data(), aux_size);
}
}
return true;
}
void ProcessInstrRange(const ETMInstrRange& instr_range) {
if (instr_range.dso->GetDebugFilePath().find(binary_name_filter_) == std::string::npos) {
return;
}
auto& binary = binary_map_[instr_range.dso->GetDebugFilePath()];
binary.range_count_map[AddrPair(instr_range.start_addr, instr_range.end_addr)] +=
instr_range.branch_taken_count + instr_range.branch_not_taken_count;
if (instr_range.branch_taken_count > 0) {
binary.branch_count_map[AddrPair(instr_range.end_addr, instr_range.branch_to_addr)] +=
instr_range.branch_taken_count;
}
}
void PostProcess() {
for (const auto& pair : binary_map_) {
const std::string& binary_path = pair.first;
const BinaryInfo& binary = pair.second;
// Write range_count_map.
fprintf(output_fp_.get(), "%zu\n", binary.range_count_map.size());
for (const auto& pair2 : binary.range_count_map) {
const AddrPair& addr_range = pair2.first;
uint64_t count = pair2.second;
fprintf(output_fp_.get(), "%" PRIx64 "-%" PRIx64 ":%" PRIu64 "\n", addr_range.first,
addr_range.second, count);
}
// Write addr_count_map.
fprintf(output_fp_.get(), "0\n");
// Write branch_count_map.
fprintf(output_fp_.get(), "%zu\n", binary.branch_count_map.size());
for (const auto& pair2 : binary.branch_count_map) {
const AddrPair& branch = pair2.first;
uint64_t count = pair2.second;
fprintf(output_fp_.get(), "%" PRIx64 "->%" PRIx64 ":%" PRIu64 "\n", branch.first,
branch.second, count);
}
// Write the binary path in comment.
fprintf(output_fp_.get(), "// %s\n\n", binary_path.c_str());
}
}
std::string binary_name_filter_;
std::string input_filename_ = "perf.data";
std::string output_filename_ = "perf_inject.data";
ThreadTree thread_tree_;
std::unique_ptr<RecordFileReader> record_file_reader_;
ETMDumpOption etm_dump_option_;
std::unique_ptr<ETMDecoder> etm_decoder_;
std::vector<uint8_t> aux_data_buffer_;
std::unique_ptr<FILE, decltype(&fclose)> output_fp_;
// Store results for AutoFDO.
std::unordered_map<std::string, BinaryInfo> binary_map_;
};
} // namespace
void RegisterInjectCommand() {
return RegisterCommand("inject", [] { return std::unique_ptr<Command>(new InjectCommand); });
}
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