cmd_list.cpp revision ff7465c896ab90c162cbcf2b141c4cdd79bf437f 
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 <stdio.h>
18#include <map>
19#include <string>
20#include <vector>
21
22#include <android-base/logging.h>
23
24#include "command.h"
25#include "event_attr.h"
26#include "event_fd.h"
27#include "event_type.h"
28
29static void PrintEventTypesOfType(uint32_t type, const std::string& type_name,
30                                  const std::vector<EventType>& event_types) {
31  printf("List of %s:\n", type_name.c_str());
32  for (auto& event_type : event_types) {
33    if (event_type.type == type &&
34        IsEventAttrSupportedByKernel(CreateDefaultPerfEventAttr(event_type))) {
35      printf("  %s\n", event_type.name.c_str());
36    }
37  }
38  printf("\n");
39}
40
41class ListCommand : public Command {
42 public:
43  ListCommand()
44      : Command("list", "list available event types",
45                "Usage: simpleperf list [hw|sw|cache|tracepoint]\n"
46                "    List all available perf events on this machine.\n") {
47  }
48
49  bool Run(const std::vector<std::string>& args) override;
50};
51
52bool ListCommand::Run(const std::vector<std::string>& args) {
53  static std::map<std::string, std::pair<int, std::string>> type_map = {
54      {"hw", {PERF_TYPE_HARDWARE, "hardware events"}},
55      {"sw", {PERF_TYPE_SOFTWARE, "software events"}},
56      {"cache", {PERF_TYPE_HW_CACHE, "hw-cache events"}},
57      {"tracepoint", {PERF_TYPE_TRACEPOINT, "tracepoint events"}},
58  };
59
60  std::vector<std::string> names;
61  if (args.empty()) {
62    for (auto& item : type_map) {
63      names.push_back(item.first);
64    }
65  } else {
66    for (auto& arg : args) {
67      if (type_map.find(arg) != type_map.end()) {
68        names.push_back(arg);
69      } else {
70        LOG(ERROR) << "unknown event type category: " << arg << ", try using \"help list\"";
71        return false;
72      }
73    }
74  }
75
76  auto& event_types = GetAllEventTypes();
77
78  for (auto& name : names) {
79    auto it = type_map.find(name);
80    PrintEventTypesOfType(it->second.first, it->second.second, event_types);
81  }
82  return true;
83}
84
85void RegisterListCommand() {
86  RegisterCommand("list", [] { return std::unique_ptr<Command>(new ListCommand); });
87}
88