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 "command.h"
18
19#include <algorithm>
20#include <map>
21#include <string>
22#include <vector>
23
24#include <android-base/logging.h>
25
26#include "utils.h"
27
28bool Command::NextArgumentOrError(const std::vector<std::string>& args, size_t* pi) {
29  if (*pi + 1 == args.size()) {
30    LOG(ERROR) << "No argument following " << args[*pi] << " option. Try `simpleperf help " << name_
31               << "`";
32    return false;
33  }
34  ++*pi;
35  return true;
36}
37
38void Command::ReportUnknownOption(const std::vector<std::string>& args, size_t i) {
39  LOG(ERROR) << "Unknown option for " << name_ << " command: '" << args[i]
40             << "'. Try `simpleperf help " << name_ << "`";
41}
42
43typedef std::function<std::unique_ptr<Command>(void)> callback_t;
44
45static std::map<std::string, callback_t>& CommandMap() {
46  // commands is used in the constructor of Command. Defining it as a static
47  // variable in a function makes sure it is initialized before use.
48  static std::map<std::string, callback_t> command_map;
49  return command_map;
50}
51
52void RegisterCommand(const std::string& cmd_name,
53                     const std::function<std::unique_ptr<Command>(void)>& callback) {
54  CommandMap().insert(std::make_pair(cmd_name, callback));
55}
56
57void UnRegisterCommand(const std::string& cmd_name) {
58  CommandMap().erase(cmd_name);
59}
60
61std::unique_ptr<Command> CreateCommandInstance(const std::string& cmd_name) {
62  auto it = CommandMap().find(cmd_name);
63  return (it == CommandMap().end()) ? nullptr : (it->second)();
64}
65
66const std::vector<std::string> GetAllCommandNames() {
67  std::vector<std::string> names;
68  for (auto pair : CommandMap()) {
69    names.push_back(pair.first);
70  }
71  return names;
72}
73
74extern void RegisterDumpRecordCommand();
75extern void RegisterHelpCommand();
76extern void RegisterListCommand();
77extern void RegisterKmemCommand();
78extern void RegisterRecordCommand();
79extern void RegisterReportCommand();
80extern void RegisterReportSampleCommand();
81extern void RegisterStatCommand();
82
83class CommandRegister {
84 public:
85  CommandRegister() {
86    RegisterDumpRecordCommand();
87    RegisterHelpCommand();
88    RegisterKmemCommand();
89    RegisterReportCommand();
90    RegisterReportSampleCommand();
91#if defined(__linux__)
92    RegisterListCommand();
93    RegisterRecordCommand();
94    RegisterStatCommand();
95#endif
96  }
97};
98
99CommandRegister command_register;
100
101bool RunSimpleperfCmd(int argc, char** argv) {
102  android::base::InitLogging(argv, android::base::StderrLogger);
103  std::vector<std::string> args;
104  android::base::LogSeverity log_severity = android::base::INFO;
105
106  for (int i = 1; i < argc; ++i) {
107    if (strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "-h") == 0) {
108      args.insert(args.begin(), "help");
109    } else if (strcmp(argv[i], "--log") == 0) {
110      if (i + 1 < argc) {
111        ++i;
112        if (!GetLogSeverity(argv[i], &log_severity)) {
113          LOG(ERROR) << "Unknown log severity: " << argv[i];
114          return false;
115        }
116      } else {
117        LOG(ERROR) << "Missing argument for --log option.\n";
118        return false;
119      }
120    } else if (strcmp(argv[i], "--version") == 0) {
121      LOG(INFO) << "Simpleperf version " << GetSimpleperfVersion();
122      return true;
123    } else {
124      args.push_back(argv[i]);
125    }
126  }
127  android::base::ScopedLogSeverity severity(log_severity);
128
129  if (args.empty()) {
130    args.push_back("help");
131  }
132  std::unique_ptr<Command> command = CreateCommandInstance(args[0]);
133  if (command == nullptr) {
134    LOG(ERROR) << "malformed command line: unknown command " << args[0];
135    return false;
136  }
137  std::string command_name = args[0];
138  args.erase(args.begin());
139
140  LOG(DEBUG) << "command '" << command_name << "' starts running";
141  bool result = command->Run(args);
142  LOG(DEBUG) << "command '" << command_name << "' "
143             << (result ? "finished successfully" : "failed");
144  return result;
145}
146