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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.
*/
#pragma once
#include <inttypes.h>
#include <map>
#include <memory>
#include <android-base/expected.h>
#include "event_type.h"
#include "perf_event.h"
#include "record.h"
namespace simpleperf {
struct ETMPerCpu {
uint32_t trcidr0;
uint32_t trcidr1;
uint32_t trcidr2;
uint32_t trcidr4;
uint32_t trcidr8;
uint32_t trcauthstatus;
uint32_t trcdevarch;
int GetMajorVersion() const;
bool IsContextIDSupported() const;
bool IsTimestampSupported() const;
bool IsCycAccSupported() const;
bool IsEnabled() const;
};
// Help recording Coresight ETM data on ARM devices.
// 1. Get etm event type on device.
// 2. Get sink config, which selects the ETR device moving etm data to memory.
// 3. Get etm info on each cpu.
// The etm event type and sink config are used to build perf_event_attr for etm data tracing.
// The etm info is kept in perf.data to help etm decoding.
class ETMRecorder {
public:
static ETMRecorder& GetInstance();
// If not found, return -1.
int GetEtmEventType();
std::unique_ptr<EventType> BuildEventType();
bool IsETMDriverAvailable();
android::base::expected<bool, std::string> CheckEtmSupport();
void SetEtmPerfEventAttr(perf_event_attr* attr);
AuxTraceInfoRecord CreateAuxTraceInfoRecord();
size_t GetAddrFilterPairs();
void SetRecordTimestamp(bool record);
void SetRecordCycles(bool record);
void SetCycleThreshold(size_t threshold);
private:
bool ReadEtmInfo();
bool FindSinkConfig();
void BuildEtmConfig();
int event_type_ = 0;
bool etm_supported_ = false;
// select ETR device, setting in perf_event_attr->config2
uint32_t sink_config_ = 0;
// use EL2 PID tracing or not
bool use_contextid2_ = false;
// select etm options (timestamp, context_id, ...), setting in perf_event_attr->config
uint64_t etm_event_config_ = 0;
// set cycle count threshold using perf_event_attr->config3
uint64_t cc_threshold_config_ = 0;
// record etm options in AuxTraceInfoRecord
uint32_t etm_config_reg_ = 0;
std::map<int, ETMPerCpu> etm_info_;
bool record_timestamp_ = false;
bool record_cycles_ = false;
uint64_t cycle_threshold_ = 0;
};
} // namespace simpleperf
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