1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <inttypes.h> 20 21 #include <map> 22 #include <memory> 23 24 #include "event_type.h" 25 #include "perf_event.h" 26 #include "record.h" 27 28 namespace simpleperf { 29 30 struct ETMPerCpu { 31 uint32_t trcidr0; 32 uint32_t trcidr1; 33 uint32_t trcidr2; 34 uint32_t trcidr4; 35 uint32_t trcidr8; 36 uint32_t trcauthstatus; 37 38 int GetMajorVersion() const; 39 bool IsContextIDSupported() const; 40 bool IsTimestampSupported() const; 41 bool IsEnabled() const; 42 }; 43 44 // Help recording Coresight ETM data on ARM devices. 45 // 1. Get etm event type on device. 46 // 2. Get sink config, which selects the ETR device moving etm data to memory. 47 // 3. Get etm info on each cpu. 48 // The etm event type and sink config are used to build perf_event_attr for etm data tracing. 49 // The etm info is kept in perf.data to help etm decoding. 50 class ETMRecorder { 51 public: 52 static ETMRecorder& GetInstance(); 53 54 // If not found, return -1. 55 int GetEtmEventType(); 56 std::unique_ptr<EventType> BuildEventType(); 57 bool CheckEtmSupport(); 58 void SetEtmPerfEventAttr(perf_event_attr* attr); 59 AuxTraceInfoRecord CreateAuxTraceInfoRecord(); 60 size_t GetAddrFilterPairs(); 61 62 private: 63 bool ReadEtmInfo(); 64 bool FindSinkConfig(); 65 void BuildEtmConfig(); 66 67 int event_type_ = 0; 68 bool etm_supported_ = false; 69 // select ETR device, setting in perf_event_attr->config2 70 uint32_t sink_config_ = 0; 71 // select etm options (timestamp, context_id, ...), setting in perf_event_attr->config 72 uint64_t etm_event_config_ = 0; 73 // record etm options in AuxTraceInfoRecord 74 uint32_t etm_config_reg_ = 0; 75 std::map<int, ETMPerCpu> etm_info_; 76 }; 77 78 } // namespace simpleperf