1 //===-- CommandObjectLog.cpp ------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "CommandObjectLog.h" 10 #include "lldb/Core/Debugger.h" 11 #include "lldb/Host/OptionParser.h" 12 #include "lldb/Interpreter/CommandReturnObject.h" 13 #include "lldb/Interpreter/OptionArgParser.h" 14 #include "lldb/Interpreter/Options.h" 15 #include "lldb/Utility/Args.h" 16 #include "lldb/Utility/FileSpec.h" 17 #include "lldb/Utility/Log.h" 18 #include "lldb/Utility/Stream.h" 19 #include "lldb/Utility/Timer.h" 20 21 using namespace lldb; 22 using namespace lldb_private; 23 24 #define LLDB_OPTIONS_log 25 #include "CommandOptions.inc" 26 27 /// Common completion logic for log enable/disable. 28 static void CompleteEnableDisable(CompletionRequest &request) { 29 size_t arg_index = request.GetCursorIndex(); 30 if (arg_index == 0) { // We got: log enable/disable x[tab] 31 for (llvm::StringRef channel : Log::ListChannels()) 32 request.TryCompleteCurrentArg(channel); 33 } else if (arg_index >= 1) { // We got: log enable/disable channel x[tab] 34 llvm::StringRef channel = request.GetParsedLine().GetArgumentAtIndex(0); 35 Log::ForEachChannelCategory( 36 channel, [&request](llvm::StringRef name, llvm::StringRef desc) { 37 request.TryCompleteCurrentArg(name, desc); 38 }); 39 } 40 } 41 42 class CommandObjectLogEnable : public CommandObjectParsed { 43 public: 44 // Constructors and Destructors 45 CommandObjectLogEnable(CommandInterpreter &interpreter) 46 : CommandObjectParsed(interpreter, "log enable", 47 "Enable logging for a single log channel.", 48 nullptr), 49 m_options() { 50 CommandArgumentEntry arg1; 51 CommandArgumentEntry arg2; 52 CommandArgumentData channel_arg; 53 CommandArgumentData category_arg; 54 55 // Define the first (and only) variant of this arg. 56 channel_arg.arg_type = eArgTypeLogChannel; 57 channel_arg.arg_repetition = eArgRepeatPlain; 58 59 // There is only one variant this argument could be; put it into the 60 // argument entry. 61 arg1.push_back(channel_arg); 62 63 category_arg.arg_type = eArgTypeLogCategory; 64 category_arg.arg_repetition = eArgRepeatPlus; 65 66 arg2.push_back(category_arg); 67 68 // Push the data for the first argument into the m_arguments vector. 69 m_arguments.push_back(arg1); 70 m_arguments.push_back(arg2); 71 } 72 73 ~CommandObjectLogEnable() override = default; 74 75 Options *GetOptions() override { return &m_options; } 76 77 class CommandOptions : public Options { 78 public: 79 CommandOptions() : Options(), log_file(), log_options(0) {} 80 81 ~CommandOptions() override = default; 82 83 Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg, 84 ExecutionContext *execution_context) override { 85 Status error; 86 const int short_option = m_getopt_table[option_idx].val; 87 88 switch (short_option) { 89 case 'f': 90 log_file.SetFile(option_arg, FileSpec::Style::native); 91 FileSystem::Instance().Resolve(log_file); 92 break; 93 case 't': 94 log_options |= LLDB_LOG_OPTION_THREADSAFE; 95 break; 96 case 'v': 97 log_options |= LLDB_LOG_OPTION_VERBOSE; 98 break; 99 case 's': 100 log_options |= LLDB_LOG_OPTION_PREPEND_SEQUENCE; 101 break; 102 case 'T': 103 log_options |= LLDB_LOG_OPTION_PREPEND_TIMESTAMP; 104 break; 105 case 'p': 106 log_options |= LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD; 107 break; 108 case 'n': 109 log_options |= LLDB_LOG_OPTION_PREPEND_THREAD_NAME; 110 break; 111 case 'S': 112 log_options |= LLDB_LOG_OPTION_BACKTRACE; 113 break; 114 case 'a': 115 log_options |= LLDB_LOG_OPTION_APPEND; 116 break; 117 case 'F': 118 log_options |= LLDB_LOG_OPTION_PREPEND_FILE_FUNCTION; 119 break; 120 default: 121 llvm_unreachable("Unimplemented option"); 122 } 123 124 return error; 125 } 126 127 void OptionParsingStarting(ExecutionContext *execution_context) override { 128 log_file.Clear(); 129 log_options = 0; 130 } 131 132 llvm::ArrayRef<OptionDefinition> GetDefinitions() override { 133 return llvm::makeArrayRef(g_log_options); 134 } 135 136 // Instance variables to hold the values for command options. 137 138 FileSpec log_file; 139 uint32_t log_options; 140 }; 141 142 void 143 HandleArgumentCompletion(CompletionRequest &request, 144 OptionElementVector &opt_element_vector) override { 145 CompleteEnableDisable(request); 146 } 147 148 protected: 149 bool DoExecute(Args &args, CommandReturnObject &result) override { 150 if (args.GetArgumentCount() < 2) { 151 result.AppendErrorWithFormat( 152 "%s takes a log channel and one or more log types.\n", 153 m_cmd_name.c_str()); 154 result.SetStatus(eReturnStatusFailed); 155 return false; 156 } 157 158 // Store into a std::string since we're about to shift the channel off. 159 const std::string channel = args[0].ref(); 160 args.Shift(); // Shift off the channel 161 char log_file[PATH_MAX]; 162 if (m_options.log_file) 163 m_options.log_file.GetPath(log_file, sizeof(log_file)); 164 else 165 log_file[0] = '\0'; 166 167 std::string error; 168 llvm::raw_string_ostream error_stream(error); 169 bool success = 170 GetDebugger().EnableLog(channel, args.GetArgumentArrayRef(), log_file, 171 m_options.log_options, error_stream); 172 result.GetErrorStream() << error_stream.str(); 173 174 if (success) 175 result.SetStatus(eReturnStatusSuccessFinishNoResult); 176 else 177 result.SetStatus(eReturnStatusFailed); 178 return result.Succeeded(); 179 } 180 181 CommandOptions m_options; 182 }; 183 184 class CommandObjectLogDisable : public CommandObjectParsed { 185 public: 186 // Constructors and Destructors 187 CommandObjectLogDisable(CommandInterpreter &interpreter) 188 : CommandObjectParsed(interpreter, "log disable", 189 "Disable one or more log channel categories.", 190 nullptr) { 191 CommandArgumentEntry arg1; 192 CommandArgumentEntry arg2; 193 CommandArgumentData channel_arg; 194 CommandArgumentData category_arg; 195 196 // Define the first (and only) variant of this arg. 197 channel_arg.arg_type = eArgTypeLogChannel; 198 channel_arg.arg_repetition = eArgRepeatPlain; 199 200 // There is only one variant this argument could be; put it into the 201 // argument entry. 202 arg1.push_back(channel_arg); 203 204 category_arg.arg_type = eArgTypeLogCategory; 205 category_arg.arg_repetition = eArgRepeatPlus; 206 207 arg2.push_back(category_arg); 208 209 // Push the data for the first argument into the m_arguments vector. 210 m_arguments.push_back(arg1); 211 m_arguments.push_back(arg2); 212 } 213 214 ~CommandObjectLogDisable() override = default; 215 216 void 217 HandleArgumentCompletion(CompletionRequest &request, 218 OptionElementVector &opt_element_vector) override { 219 CompleteEnableDisable(request); 220 } 221 222 protected: 223 bool DoExecute(Args &args, CommandReturnObject &result) override { 224 if (args.empty()) { 225 result.AppendErrorWithFormat( 226 "%s takes a log channel and one or more log types.\n", 227 m_cmd_name.c_str()); 228 result.SetStatus(eReturnStatusFailed); 229 return false; 230 } 231 232 const std::string channel = args[0].ref(); 233 args.Shift(); // Shift off the channel 234 if (channel == "all") { 235 Log::DisableAllLogChannels(); 236 result.SetStatus(eReturnStatusSuccessFinishNoResult); 237 } else { 238 std::string error; 239 llvm::raw_string_ostream error_stream(error); 240 if (Log::DisableLogChannel(channel, args.GetArgumentArrayRef(), 241 error_stream)) 242 result.SetStatus(eReturnStatusSuccessFinishNoResult); 243 result.GetErrorStream() << error_stream.str(); 244 } 245 return result.Succeeded(); 246 } 247 }; 248 249 class CommandObjectLogList : public CommandObjectParsed { 250 public: 251 // Constructors and Destructors 252 CommandObjectLogList(CommandInterpreter &interpreter) 253 : CommandObjectParsed(interpreter, "log list", 254 "List the log categories for one or more log " 255 "channels. If none specified, lists them all.", 256 nullptr) { 257 CommandArgumentEntry arg; 258 CommandArgumentData channel_arg; 259 260 // Define the first (and only) variant of this arg. 261 channel_arg.arg_type = eArgTypeLogChannel; 262 channel_arg.arg_repetition = eArgRepeatStar; 263 264 // There is only one variant this argument could be; put it into the 265 // argument entry. 266 arg.push_back(channel_arg); 267 268 // Push the data for the first argument into the m_arguments vector. 269 m_arguments.push_back(arg); 270 } 271 272 ~CommandObjectLogList() override = default; 273 274 void 275 HandleArgumentCompletion(CompletionRequest &request, 276 OptionElementVector &opt_element_vector) override { 277 for (llvm::StringRef channel : Log::ListChannels()) 278 request.TryCompleteCurrentArg(channel); 279 } 280 281 protected: 282 bool DoExecute(Args &args, CommandReturnObject &result) override { 283 std::string output; 284 llvm::raw_string_ostream output_stream(output); 285 if (args.empty()) { 286 Log::ListAllLogChannels(output_stream); 287 result.SetStatus(eReturnStatusSuccessFinishResult); 288 } else { 289 bool success = true; 290 for (const auto &entry : args.entries()) 291 success = 292 success && Log::ListChannelCategories(entry.ref(), output_stream); 293 if (success) 294 result.SetStatus(eReturnStatusSuccessFinishResult); 295 } 296 result.GetOutputStream() << output_stream.str(); 297 return result.Succeeded(); 298 } 299 }; 300 301 class CommandObjectLogTimer : public CommandObjectParsed { 302 public: 303 // Constructors and Destructors 304 CommandObjectLogTimer(CommandInterpreter &interpreter) 305 : CommandObjectParsed(interpreter, "log timers", 306 "Enable, disable, dump, and reset LLDB internal " 307 "performance timers.", 308 "log timers < enable <depth> | disable | dump | " 309 "increment <bool> | reset >") {} 310 311 ~CommandObjectLogTimer() override = default; 312 313 protected: 314 bool DoExecute(Args &args, CommandReturnObject &result) override { 315 result.SetStatus(eReturnStatusFailed); 316 317 if (args.GetArgumentCount() == 1) { 318 auto sub_command = args[0].ref(); 319 320 if (sub_command.equals_lower("enable")) { 321 Timer::SetDisplayDepth(UINT32_MAX); 322 result.SetStatus(eReturnStatusSuccessFinishNoResult); 323 } else if (sub_command.equals_lower("disable")) { 324 Timer::DumpCategoryTimes(&result.GetOutputStream()); 325 Timer::SetDisplayDepth(0); 326 result.SetStatus(eReturnStatusSuccessFinishResult); 327 } else if (sub_command.equals_lower("dump")) { 328 Timer::DumpCategoryTimes(&result.GetOutputStream()); 329 result.SetStatus(eReturnStatusSuccessFinishResult); 330 } else if (sub_command.equals_lower("reset")) { 331 Timer::ResetCategoryTimes(); 332 result.SetStatus(eReturnStatusSuccessFinishResult); 333 } 334 } else if (args.GetArgumentCount() == 2) { 335 auto sub_command = args[0].ref(); 336 auto param = args[1].ref(); 337 338 if (sub_command.equals_lower("enable")) { 339 uint32_t depth; 340 if (param.consumeInteger(0, depth)) { 341 result.AppendError( 342 "Could not convert enable depth to an unsigned integer."); 343 } else { 344 Timer::SetDisplayDepth(depth); 345 result.SetStatus(eReturnStatusSuccessFinishNoResult); 346 } 347 } else if (sub_command.equals_lower("increment")) { 348 bool success; 349 bool increment = OptionArgParser::ToBoolean(param, false, &success); 350 if (success) { 351 Timer::SetQuiet(!increment); 352 result.SetStatus(eReturnStatusSuccessFinishNoResult); 353 } else 354 result.AppendError("Could not convert increment value to boolean."); 355 } 356 } 357 358 if (!result.Succeeded()) { 359 result.AppendError("Missing subcommand"); 360 result.AppendErrorWithFormat("Usage: %s\n", m_cmd_syntax.c_str()); 361 } 362 return result.Succeeded(); 363 } 364 }; 365 366 CommandObjectLog::CommandObjectLog(CommandInterpreter &interpreter) 367 : CommandObjectMultiword(interpreter, "log", 368 "Commands controlling LLDB internal logging.", 369 "log <subcommand> [<command-options>]") { 370 LoadSubCommand("enable", 371 CommandObjectSP(new CommandObjectLogEnable(interpreter))); 372 LoadSubCommand("disable", 373 CommandObjectSP(new CommandObjectLogDisable(interpreter))); 374 LoadSubCommand("list", 375 CommandObjectSP(new CommandObjectLogList(interpreter))); 376 LoadSubCommand("timers", 377 CommandObjectSP(new CommandObjectLogTimer(interpreter))); 378 } 379 380 CommandObjectLog::~CommandObjectLog() = default; 381