mirror of
https://gitee.com/openharmony/developtools_hiperf
synced 2024-11-27 01:30:28 +00:00
102 lines
3.2 KiB
C++
102 lines
3.2 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_FILE_READER
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#define HIPERF_FILE_READER
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#include <functional>
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#include <string>
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#include <unordered_map>
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#include "perf_event_record.h"
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#include "perf_file_format.h"
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namespace OHOS {
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namespace Developtools {
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namespace HiPerf {
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using ProcessRecordCB = const std::function<bool(PerfEventRecord& record)>;
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// read record from 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 PerfFileReader {
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public:
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virtual ~PerfFileReader();
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static std::unique_ptr<PerfFileReader> Instance(const std::string &fileName);
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const perf_file_header &GetHeader() const;
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std::vector<AttrWithId> GetAttrSection() const;
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// read data section, construct record, call callback for each record
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bool ReadDataSection(ProcessRecordCB &callback);
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bool ReadFeatureSection();
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const std::vector<FEATURE> &GetFeatures() const;
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const std::vector<std::unique_ptr<PerfFileSection>> &GetFeatureSections() const;
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const PerfFileSection *GetFeatureSection(FEATURE feature) const;
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explicit PerfFileReader(const std::string &fileName, FILE *fp);
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const std::string GetFeatureString(const FEATURE feature) const;
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bool IsFeatrureStringSection(const FEATURE featureId) const
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{
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return find(FeatureStrings.begin(), FeatureStrings.end(), featureId) !=
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FeatureStrings.end();
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}
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// fuzz user this
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protected:
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virtual bool Read(void *buf, size_t len);
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virtual bool Read(char *buf, uint64_t offset, size_t len);
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FILE *fp_ = nullptr;
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bool ReadFileHeader();
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bool ReadAttrSection();
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private:
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bool ReadRecord(ProcessRecordCB &callback);
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bool IsValidDataFile();
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bool IsGzipFile();
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// file header must be read first
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bool ReadIdsForAttr(const perf_file_attr &attr, std::vector<uint64_t> *ids);
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const perf_event_attr *GetDefaultAttr();
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const std::string fileName_;
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uint64_t dataSectionSize_;
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bool compressData_ = false;
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perf_file_header header_;
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std::vector<perf_file_attr> vecAttr_;
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std::vector<std::vector<uint64_t>> vecAttrIds_;
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std::unordered_map<uint64_t, size_t> mapId2Attr_;
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uint64_t featureSectionOffset_;
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std::vector<FEATURE> features_;
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std::vector<std::unique_ptr<PerfFileSection>> perfFileSections_;
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size_t fileSize_ = 0;
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#ifdef HIPERF_DEBUG_TIME
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std::chrono::microseconds readRecordTime_ = std::chrono::microseconds::zero();
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std::chrono::microseconds readCallbackTime_ = std::chrono::microseconds::zero();
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#endif
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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_FILE_READER
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