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 #include "event_type.h" 18 19 #include <unistd.h> 20 #include <string> 21 #include <vector> 22 23 #include <base/logging.h> 24 25 #include "event_attr.h" 26 #include "event_fd.h" 27 28 #define EVENT_TYPE_TABLE_ENTRY(name, type, config) \ 29 { name, type, config } \ 30 , 31 32 static std::vector<const EventType> event_type_array = { 33 #include "event_type_table.h" 34 }; 35 36 static bool IsEventTypeSupportedByKernel(const EventType& event_type) { 37 auto event_fd = EventFd::OpenEventFileForProcess(CreateDefaultPerfEventAttr(event_type), getpid()); 38 return event_fd != nullptr; 39 } 40 41 bool EventType::IsSupportedByKernel() const { 42 return IsEventTypeSupportedByKernel(*this); 43 } 44 45 const std::vector<const EventType>& EventTypeFactory::GetAllEventTypes() { 46 return event_type_array; 47 } 48 49 const EventType* EventTypeFactory::FindEventTypeByName(const std::string& name, 50 bool report_unsupported_type) { 51 const EventType* result = nullptr; 52 for (auto& event_type : event_type_array) { 53 if (event_type.name == name) { 54 result = &event_type; 55 break; 56 } 57 } 58 if (result == nullptr) { 59 LOG(ERROR) << "Unknown event_type '" << name 60 << "', try `simpleperf list` to list all possible event type names"; 61 return nullptr; 62 } 63 if (!result->IsSupportedByKernel()) { 64 (report_unsupported_type ? PLOG(ERROR) : PLOG(DEBUG)) << "Event type '" << result->name 65 << "' is not supported by the kernel"; 66 return nullptr; 67 } 68 return result; 69 } 70 71 const EventType* EventTypeFactory::FindEventTypeByConfig(uint32_t type, uint64_t config) { 72 for (auto& event_type : event_type_array) { 73 if (event_type.type == type && event_type.config == config) { 74 return &event_type; 75 } 76 } 77 return nullptr; 78 } 79
