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// Copyright 2014 Google Inc. All rights reserved.
//
// 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.
// Read the samples from the profile datafile.
#ifndef AUTOFDO_SAMPLE_READER_H_
#define AUTOFDO_SAMPLE_READER_H_
#include <map>
#include <set>
#include <string>
#include <vector>
#include <utility>
#include "base/common.h"
namespace linux_tools_perf {
union perf_event;
} // namespace linux_tools_perf
namespace autofdo {
// All counter type is using uint64 instead of int64 because GCC's gcov
// functions only takes unsigned variables.
typedef map<uint64, uint64> AddressCountMap;
typedef pair<uint64, uint64> Range;
typedef map<Range, uint64> RangeCountMap;
typedef pair<uint64, uint64> Branch;
typedef map<Branch, uint64> BranchCountMap;
// Reads in the profile data, and represent it in address_count_map_.
class SampleReader {
public:
SampleReader() : total_count_(0) {}
virtual ~SampleReader() {}
bool ReadAndSetTotalCount();
const AddressCountMap &address_count_map() const {
return address_count_map_;
}
const RangeCountMap &range_count_map() const {
return range_count_map_;
}
const BranchCountMap &branch_count_map() const {
return branch_count_map_;
}
set<uint64> GetSampledAddresses() const;
// Returns the sample count for a given instruction.
uint64 GetSampleCountOrZero(uint64 addr) const;
// Returns the total sampled count.
uint64 GetTotalSampleCount() const;
// Returns the max count.
uint64 GetTotalCount() const {
return total_count_;
}
// Clear all maps to release memory.
void Clear() {
address_count_map_.clear();
range_count_map_.clear();
branch_count_map_.clear();
}
protected:
// Virtual read function to read from different types of profiles.
virtual bool Read() = 0;
uint64 total_count_;
AddressCountMap address_count_map_;
RangeCountMap range_count_map_;
BranchCountMap branch_count_map_;
};
// Base class that reads in the profile from a sample data file.
class FileSampleReader : public SampleReader {
public:
explicit FileSampleReader(const string &profile_file)
: profile_file_(profile_file) {}
virtual bool Append(const string &profile_file) = 0;
protected:
virtual bool Read();
string profile_file_;
};
// Reads/Writes sample data from/to text file.
// The text file format:
//
// number of entries in range_count_map
// from_1-to_1:count_1
// from_2-to_2:count_2
// ......
// from_n-to_n:count_n
// number of entries in address_count_map
// addr_1:count_1
// addr_2:count_2
// ......
// addr_n:count_n
class TextSampleReaderWriter : public FileSampleReader {
public:
explicit TextSampleReaderWriter(const string &profile_file) :
FileSampleReader(profile_file) { }
explicit TextSampleReaderWriter() : FileSampleReader("") { }
virtual bool Append(const string &profile_file);
void Merge(const SampleReader &reader);
// Writes the profile to file, and appending aux_info at the end.
bool Write(const char *aux_info);
bool IsFileExist() const;
void IncAddress(uint64 addr) {
address_count_map_[addr]++;
}
void IncRange(uint64 start, uint64 end) {
range_count_map_[Range(start, end)]++;
}
void IncBranch(uint64 from, uint64 to) {
branch_count_map_[Branch(from, to)]++;
}
void set_profile_file(const string &file) {
profile_file_ = file;
}
private:
DISALLOW_COPY_AND_ASSIGN(TextSampleReaderWriter);
};
// Reads in the sample data from 'perf -g' output file.
class PerfDataSampleReader : public FileSampleReader {
public:
explicit PerfDataSampleReader(const string &profile_file,
const string &re) :
FileSampleReader(profile_file), focus_binary_re_(re) { }
virtual bool Append(const string &profile_file);
private:
const string focus_binary_re_;
DISALLOW_COPY_AND_ASSIGN(PerfDataSampleReader);
};
} // namespace autofdo
#endif // AUTOFDO_SAMPLE_READER_H_
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