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/*
* 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.
*/
#ifndef SIMPLE_PERF_EVENT_ATTR_H_
#define SIMPLE_PERF_EVENT_ATTR_H_
#include <stdint.h>
#include <string>
#include "perf_event.h"
struct EventType;
// EventAttr manages perf_event_attr, which provides detailed configuration information when
// opening a perf_event_file. The configuration information tells the kernel how to count and
// record events.
class EventAttr {
public:
static EventAttr CreateDefaultAttrToMonitorEvent(const EventType& event_type);
EventAttr(const perf_event_attr& attr) : attr_(attr) {
}
perf_event_attr Attr() const {
return attr_;
}
uint64_t SampleType() const {
return attr_.sample_type;
}
void EnableOnExec() {
attr_.enable_on_exec = 1;
}
void SetSampleFreq(uint64_t freq) {
attr_.freq = 1;
attr_.sample_freq = freq;
}
void SetSamplePeriod(uint64_t period) {
attr_.freq = 0;
attr_.sample_period = period;
}
void SetSampleAll() {
attr_.sample_id_all = 1;
}
void Dump(size_t indent = 0) const;
private:
perf_event_attr attr_;
};
#endif // SIMPLE_PERF_EVENT_ATTR_H_
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