2 * Copyright (C) 2015 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #include "event_type.h"
24 #include <android-base/file.h>
25 #include <android-base/logging.h>
27 #include "event_attr.h"
31 #define EVENT_TYPE_TABLE_ENTRY(name, type, config) {name, type, config},
33 static const std::vector<EventType> static_event_type_array = {
34 #include "event_type_table.h"
37 static const std::vector<EventType> GetTracepointEventTypes() {
38 std::vector<EventType> result;
39 const std::string tracepoint_dirname = "/sys/kernel/debug/tracing/events";
40 std::vector<std::string> system_dirs;
41 GetEntriesInDir(tracepoint_dirname, nullptr, &system_dirs);
42 for (auto& system_name : system_dirs) {
43 std::string system_path = tracepoint_dirname + "/" + system_name;
44 std::vector<std::string> event_dirs;
45 GetEntriesInDir(system_path, nullptr, &event_dirs);
46 for (auto& event_name : event_dirs) {
47 std::string id_path = system_path + "/" + event_name + "/id";
48 std::string id_content;
49 if (!android::base::ReadFileToString(id_path, &id_content)) {
53 uint64_t id = strtoull(id_content.c_str(), &endptr, 10);
54 if (endptr == id_content.c_str()) {
55 LOG(DEBUG) << "unexpected id '" << id_content << "' in " << id_path;
58 result.push_back(EventType(system_name + ":" + event_name, PERF_TYPE_TRACEPOINT, id));
61 std::sort(result.begin(), result.end(),
62 [](const EventType& type1, const EventType& type2) { return type1.name < type2.name; });
66 const std::vector<EventType>& GetAllEventTypes() {
67 static std::vector<EventType> event_type_array;
68 if (event_type_array.empty()) {
69 event_type_array.insert(event_type_array.end(), static_event_type_array.begin(),
70 static_event_type_array.end());
71 const std::vector<EventType> tracepoint_array = GetTracepointEventTypes();
72 event_type_array.insert(event_type_array.end(), tracepoint_array.begin(),
73 tracepoint_array.end());
75 return event_type_array;
78 const EventType* FindEventTypeByConfig(uint32_t type, uint64_t config) {
79 for (auto& event_type : GetAllEventTypes()) {
80 if (event_type.type == type && event_type.config == config) {
87 const EventType* FindEventTypeByName(const std::string& name) {
88 const EventType* result = nullptr;
89 for (auto& event_type : GetAllEventTypes()) {
90 if (event_type.name == name) {
95 if (result == nullptr) {
96 LOG(ERROR) << "Unknown event_type '" << name
97 << "', try `simpleperf list` to list all possible event type names";
103 std::unique_ptr<EventTypeAndModifier> ParseEventType(const std::string& event_type_str) {
104 static std::string modifier_characters = "ukhGHp";
105 std::unique_ptr<EventTypeAndModifier> event_type_modifier(new EventTypeAndModifier);
106 event_type_modifier->name = event_type_str;
107 std::string event_type_name = event_type_str;
108 std::string modifier;
109 size_t comm_pos = event_type_str.rfind(':');
110 if (comm_pos != std::string::npos) {
111 bool match_modifier = true;
112 for (size_t i = comm_pos + 1; i < event_type_str.size(); ++i) {
113 char c = event_type_str[i];
114 if (c != ' ' && modifier_characters.find(c) == std::string::npos) {
115 match_modifier = false;
119 if (match_modifier) {
120 event_type_name = event_type_str.substr(0, comm_pos);
121 modifier = event_type_str.substr(comm_pos + 1);
124 const EventType* event_type = FindEventTypeByName(event_type_name);
125 if (event_type == nullptr) {
126 // Try if the modifier belongs to the event type name, like some tracepoint events.
127 if (!modifier.empty()) {
128 event_type_name = event_type_str;
130 event_type = FindEventTypeByName(event_type_name);
132 if (event_type == nullptr) {
136 event_type_modifier->event_type = *event_type;
137 if (modifier.find_first_of("ukh") != std::string::npos) {
138 event_type_modifier->exclude_user = true;
139 event_type_modifier->exclude_kernel = true;
140 event_type_modifier->exclude_hv = true;
142 if (modifier.find_first_of("GH") != std::string::npos) {
143 event_type_modifier->exclude_guest = true;
144 event_type_modifier->exclude_host = true;
147 for (auto& c : modifier) {
150 event_type_modifier->exclude_user = false;
153 event_type_modifier->exclude_kernel = false;
156 event_type_modifier->exclude_hv = false;
159 event_type_modifier->exclude_guest = false;
162 event_type_modifier->exclude_host = false;
165 event_type_modifier->precise_ip++;
170 LOG(ERROR) << "Unknown event type modifier '" << c << "'";
173 event_type_modifier->modifier = modifier;
174 return event_type_modifier;