mirror of
https://gitee.com/openharmony/developtools_hiperf
synced 2024-11-23 15:39:47 +00:00
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021-2022 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef HIPERF_PERF_FILE_WRITER_H
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#define HIPERF_PERF_FILE_WRITER_H
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#include <functional>
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#include <unordered_map>
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#include <vector>
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#include "perf_event_record.h"
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#include "perf_file_format.h"
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#include "symbols_file.h"
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#include "virtual_runtime.h"
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namespace OHOS {
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namespace Developtools {
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namespace HiPerf {
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constexpr const int WRITER_BUFFER_SIZE = 4 * 1024 * 1024;
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// write record to data file, like perf.data.
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// format of file follow
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// tools/perf/Documentation/perf.data-file-format.txt
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class PerfFileWriter {
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public:
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PerfFileWriter()
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{
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attrSection_.offset = 0;
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attrSection_.size = 0;
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defaultEventAttr_.branch_sample_type = 0;
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defaultEventAttr_.namespaces = 0;
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}
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~PerfFileWriter();
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bool Open(const std::string &fileName, bool compressData = false);
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// WriteAttrAndId() must be called before WriteRecord()
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bool WriteAttrAndId(const std::vector<AttrWithId> &attrIds);
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bool WriteRecord(const PerfEventRecord &record);
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bool AddNrCpusFeature(FEATURE feature, uint32_t nrCpusAvailable, uint32_t nrCpusOnline);
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bool AddEventDescFeature(FEATURE feature, const std::vector<AttrWithId> &eventDesces);
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bool AddStringFeature(FEATURE feature, std::string string);
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bool AddU64Feature(FEATURE feature, uint64_t v);
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bool AddBoolFeature(FEATURE feature);
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bool AddSymbolsFeature(const std::vector<std::unique_ptr<SymbolsFile>> &);
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bool AddUniStackTableFeature(const ProcessStackMap *table);
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// close file
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bool Close();
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uint64_t GetDataSize() const;
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uint GetRecordCount() const;
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std::chrono::microseconds writeTimes_ = std::chrono::microseconds::zero();
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using ProcessRecordCB = const std::function<bool(std::unique_ptr<PerfEventRecord> record)>;
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bool ReadDataSection(ProcessRecordCB &callback);
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bool ReadRecords(ProcessRecordCB &callback);
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bool Read(void *buf, size_t len);
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private:
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std::string fileBuffer_;
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bool GetFilePos(uint64_t &pos) const;
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bool Write(const void *buf, size_t len);
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bool WriteHeader();
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bool WriteFeatureData();
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std::string fileName_;
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FILE *fp_ = nullptr;
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perf_file_header header_;
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perf_file_section attrSection_;
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perf_file_section dataSection_;
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std::vector<std::unique_ptr<PerfFileSection>> featureSections_;
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perf_event_attr defaultEventAttr_;
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uint recordCount_ = 0;
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bool compressData_ = false;
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bool isWritingRecord = false;
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};
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} // namespace HiPerf
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} // namespace Developtools
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} // namespace OHOS
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#endif // HIPERF_PERF_FILE_WRITER_H
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