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"
30 #define EVENT_TYPE_TABLE_ENTRY(name, type, config) {name, type, config},
32 static const std::vector<EventType> static_event_type_array = {
33 #include "event_type_table.h"
36 static const std::vector<EventType> GetTracepointEventTypes() {
37 std::vector<EventType> result;
38 const std::string tracepoint_dirname = "/sys/kernel/debug/tracing/events";
39 std::vector<std::string> system_dirs;
40 GetEntriesInDir(tracepoint_dirname, nullptr, &system_dirs);
41 for (auto& system_name : system_dirs) {
42 std::string system_path = tracepoint_dirname + "/" + system_name;
43 std::vector<std::string> event_dirs;
44 GetEntriesInDir(system_path, nullptr, &event_dirs);
45 for (auto& event_name : event_dirs) {
46 std::string id_path = system_path + "/" + event_name + "/id";
47 std::string id_content;
48 if (!android::base::ReadFileToString(id_path, &id_content)) {
52 uint64_t id = strtoull(id_content.c_str(), &endptr, 10);
53 if (endptr == id_content.c_str()) {
54 LOG(DEBUG) << "unexpected id '" << id_content << "' in " << id_path;
57 result.push_back(EventType(system_name + ":" + event_name, PERF_TYPE_TRACEPOINT, id));
60 std::sort(result.begin(), result.end(),
61 [](const EventType& type1, const EventType& type2) { return type1.name < type2.name; });
65 const std::vector<EventType>& GetAllEventTypes() {
66 static std::vector<EventType> event_type_array;
67 if (event_type_array.empty()) {
68 event_type_array.insert(event_type_array.end(), static_event_type_array.begin(),
69 static_event_type_array.end());
70 const std::vector<EventType> tracepoint_array = GetTracepointEventTypes();
71 event_type_array.insert(event_type_array.end(), tracepoint_array.begin(),
72 tracepoint_array.end());
74 return event_type_array;
77 const EventType* FindEventTypeByName(const std::string& name) {
78 const EventType* result = nullptr;
79 for (auto& event_type : GetAllEventTypes()) {
80 if (event_type.name == name) {
85 if (result == nullptr) {
86 LOG(ERROR) << "Unknown event_type '" << name
87 << "', try `simpleperf list` to list all possible event type names";
93 std::unique_ptr<EventTypeAndModifier> ParseEventType(const std::string& event_type_str) {
94 static std::string modifier_characters = "ukhGHp";
95 std::unique_ptr<EventTypeAndModifier> event_type_modifier(new EventTypeAndModifier);
96 event_type_modifier->name = event_type_str;
97 std::string event_type_name = event_type_str;
99 size_t comm_pos = event_type_str.rfind(':');
100 if (comm_pos != std::string::npos) {
101 bool match_modifier = true;
102 for (size_t i = comm_pos + 1; i < event_type_str.size(); ++i) {
103 char c = event_type_str[i];
104 if (c != ' ' && modifier_characters.find(c) == std::string::npos) {
105 match_modifier = false;
109 if (match_modifier) {
110 event_type_name = event_type_str.substr(0, comm_pos);
111 modifier = event_type_str.substr(comm_pos + 1);
114 const EventType* event_type = FindEventTypeByName(event_type_name);
115 if (event_type == nullptr) {
116 // Try if the modifier belongs to the event type name, like some tracepoint events.
117 if (!modifier.empty()) {
118 event_type_name = event_type_str;
120 event_type = FindEventTypeByName(event_type_name);
122 if (event_type == nullptr) {
126 event_type_modifier->event_type = *event_type;
127 if (modifier.find_first_of("ukh") != std::string::npos) {
128 event_type_modifier->exclude_user = true;
129 event_type_modifier->exclude_kernel = true;
130 event_type_modifier->exclude_hv = true;
132 if (modifier.find_first_of("GH") != std::string::npos) {
133 event_type_modifier->exclude_guest = true;
134 event_type_modifier->exclude_host = true;
137 for (auto& c : modifier) {
140 event_type_modifier->exclude_user = false;
143 event_type_modifier->exclude_kernel = false;
146 event_type_modifier->exclude_hv = false;
149 event_type_modifier->exclude_guest = false;
152 event_type_modifier->exclude_host = false;
155 event_type_modifier->precise_ip++;
160 LOG(ERROR) << "Unknown event type modifier '" << c << "'";
163 event_type_modifier->modifier = modifier;
164 return event_type_modifier;