1 /* 2 * Copyright (C) 2015 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 #ifndef SIMPLE_PERF_EVENT_H_ 18 #define SIMPLE_PERF_EVENT_H_ 19 20 #include <stdint.h> 21 #include <strings.h> 22 #include <memory> 23 #include <set> 24 #include <string> 25 #include <vector> 26 27 // A uint32_t value far from 0 is picked, so it is unlikely to conflict with further 28 // PERF_TYPE_* events. 29 static constexpr uint32_t SIMPLEPERF_TYPE_USER_SPACE_SAMPLERS = 32768; 30 31 enum { 32 SIMPLEPERF_CONFIG_INPLACE_SAMPLER, 33 }; 34 35 // EventType represents one type of event, like cpu_cycle_event, cache_misses_event. 36 // The user knows one event type by its name, and the kernel knows one event type by its 37 // (type, config) pair. EventType connects the two representations, and tells the user if 38 // the event type is supported by the kernel. 39 40 struct EventType { EventTypeEventType41 EventType(const std::string& name, uint32_t type, uint64_t config, 42 const std::string& description, const std::string& limited_arch) 43 : name(name), type(type), config(config), description(description), 44 limited_arch(limited_arch) { 45 } 46 EventTypeEventType47 EventType() : type(0), config(0) { 48 } 49 50 bool operator<(const EventType& other) const { 51 return strcasecmp(name.c_str(), other.name.c_str()) < 0; 52 } 53 54 std::string name; 55 uint32_t type; 56 uint64_t config; 57 std::string description; 58 std::string limited_arch; 59 }; 60 61 bool SetTracepointEventsFilePath(const std::string& filepath); 62 std::string GetTracepointEvents(); 63 64 // Used to temporarily change event types returned by GetAllEventTypes(). 65 class ScopedEventTypes { 66 public: 67 static std::string BuildString(const std::vector<const EventType*>& event_types); 68 69 ScopedEventTypes(const std::string& event_type_str); 70 ~ScopedEventTypes(); 71 72 private: 73 std::set<EventType> saved_event_types_; 74 }; 75 76 const std::set<EventType>& GetAllEventTypes(); 77 const EventType* FindEventTypeByName(const std::string& name, bool report_error = true); 78 79 struct EventTypeAndModifier { 80 std::string name; 81 EventType event_type; 82 std::string modifier; 83 bool exclude_user; 84 bool exclude_kernel; 85 bool exclude_hv; 86 bool exclude_host; 87 bool exclude_guest; 88 int precise_ip : 2; 89 EventTypeAndModifierEventTypeAndModifier90 EventTypeAndModifier() 91 : exclude_user(false), 92 exclude_kernel(false), 93 exclude_hv(false), 94 exclude_host(false), 95 exclude_guest(false), 96 precise_ip(0) { 97 } 98 }; 99 100 std::unique_ptr<EventTypeAndModifier> ParseEventType(const std::string& event_type_str); 101 102 #endif // SIMPLE_PERF_EVENT_H_ 103