1 //===-- CommandObjectWatchpointCommand.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 <vector> 10 11 #include "CommandObjectWatchpoint.h" 12 #include "CommandObjectWatchpointCommand.h" 13 #include "lldb/Breakpoint/StoppointCallbackContext.h" 14 #include "lldb/Breakpoint/Watchpoint.h" 15 #include "lldb/Core/IOHandler.h" 16 #include "lldb/Host/OptionParser.h" 17 #include "lldb/Interpreter/CommandInterpreter.h" 18 #include "lldb/Interpreter/CommandReturnObject.h" 19 #include "lldb/Interpreter/OptionArgParser.h" 20 #include "lldb/Target/Target.h" 21 #include "lldb/Target/Thread.h" 22 #include "lldb/Utility/State.h" 23 24 using namespace lldb; 25 using namespace lldb_private; 26 27 // CommandObjectWatchpointCommandAdd 28 29 // FIXME: "script-type" needs to have its contents determined dynamically, so 30 // somebody can add a new scripting 31 // language to lldb and have it pickable here without having to change this 32 // enumeration by hand and rebuild lldb proper. 33 34 static constexpr OptionEnumValueElement g_script_option_enumeration[] = { 35 {eScriptLanguageNone, "command", 36 "Commands are in the lldb command interpreter language"}, 37 {eScriptLanguagePython, "python", "Commands are in the Python language."}, 38 {eSortOrderByName, "default-script", 39 "Commands are in the default scripting language."} }; 40 41 static constexpr OptionEnumValues ScriptOptionEnum() { 42 return OptionEnumValues(g_script_option_enumeration); 43 } 44 45 #define LLDB_OPTIONS_watchpoint_command_add 46 #include "CommandOptions.inc" 47 48 class CommandObjectWatchpointCommandAdd : public CommandObjectParsed, 49 public IOHandlerDelegateMultiline { 50 public: 51 CommandObjectWatchpointCommandAdd(CommandInterpreter &interpreter) 52 : CommandObjectParsed(interpreter, "add", 53 "Add a set of LLDB commands to a watchpoint, to be " 54 "executed whenever the watchpoint is hit.", 55 nullptr), 56 IOHandlerDelegateMultiline("DONE", 57 IOHandlerDelegate::Completion::LLDBCommand), 58 m_options() { 59 SetHelpLong( 60 R"( 61 General information about entering watchpoint commands 62 ------------------------------------------------------ 63 64 )" 65 "This command will prompt for commands to be executed when the specified \ 66 watchpoint is hit. Each command is typed on its own line following the '> ' \ 67 prompt until 'DONE' is entered." 68 R"( 69 70 )" 71 "Syntactic errors may not be detected when initially entered, and many \ 72 malformed commands can silently fail when executed. If your watchpoint commands \ 73 do not appear to be executing, double-check the command syntax." 74 R"( 75 76 )" 77 "Note: You may enter any debugger command exactly as you would at the debugger \ 78 prompt. There is no limit to the number of commands supplied, but do NOT enter \ 79 more than one command per line." 80 R"( 81 82 Special information about PYTHON watchpoint commands 83 ---------------------------------------------------- 84 85 )" 86 "You may enter either one or more lines of Python, including function \ 87 definitions or calls to functions that will have been imported by the time \ 88 the code executes. Single line watchpoint commands will be interpreted 'as is' \ 89 when the watchpoint is hit. Multiple lines of Python will be wrapped in a \ 90 generated function, and a call to the function will be attached to the watchpoint." 91 R"( 92 93 This auto-generated function is passed in three arguments: 94 95 frame: an lldb.SBFrame object for the frame which hit the watchpoint. 96 97 wp: the watchpoint that was hit. 98 99 )" 100 "When specifying a python function with the --python-function option, you need \ 101 to supply the function name prepended by the module name:" 102 R"( 103 104 --python-function myutils.watchpoint_callback 105 106 The function itself must have the following prototype: 107 108 def watchpoint_callback(frame, wp): 109 # Your code goes here 110 111 )" 112 "The arguments are the same as the arguments passed to generated functions as \ 113 described above. Note that the global variable 'lldb.frame' will NOT be updated when \ 114 this function is called, so be sure to use the 'frame' argument. The 'frame' argument \ 115 can get you to the thread via frame.GetThread(), the thread can get you to the \ 116 process via thread.GetProcess(), and the process can get you back to the target \ 117 via process.GetTarget()." 118 R"( 119 120 )" 121 "Important Note: As Python code gets collected into functions, access to global \ 122 variables requires explicit scoping using the 'global' keyword. Be sure to use correct \ 123 Python syntax, including indentation, when entering Python watchpoint commands." 124 R"( 125 126 Example Python one-line watchpoint command: 127 128 (lldb) watchpoint command add -s python 1 129 Enter your Python command(s). Type 'DONE' to end. 130 > print "Hit this watchpoint!" 131 > DONE 132 133 As a convenience, this also works for a short Python one-liner: 134 135 (lldb) watchpoint command add -s python 1 -o 'import time; print time.asctime()' 136 (lldb) run 137 Launching '.../a.out' (x86_64) 138 (lldb) Fri Sep 10 12:17:45 2010 139 Process 21778 Stopped 140 * thread #1: tid = 0x2e03, 0x0000000100000de8 a.out`c + 7 at main.c:39, stop reason = watchpoint 1.1, queue = com.apple.main-thread 141 36 142 37 int c(int val) 143 38 { 144 39 -> return val + 3; 145 40 } 146 41 147 42 int main (int argc, char const *argv[]) 148 149 Example multiple line Python watchpoint command, using function definition: 150 151 (lldb) watchpoint command add -s python 1 152 Enter your Python command(s). Type 'DONE' to end. 153 > def watchpoint_output (wp_no): 154 > out_string = "Hit watchpoint number " + repr (wp_no) 155 > print out_string 156 > return True 157 > watchpoint_output (1) 158 > DONE 159 160 Example multiple line Python watchpoint command, using 'loose' Python: 161 162 (lldb) watchpoint command add -s p 1 163 Enter your Python command(s). Type 'DONE' to end. 164 > global wp_count 165 > wp_count = wp_count + 1 166 > print "Hit this watchpoint " + repr(wp_count) + " times!" 167 > DONE 168 169 )" 170 "In this case, since there is a reference to a global variable, \ 171 'wp_count', you will also need to make sure 'wp_count' exists and is \ 172 initialized:" 173 R"( 174 175 (lldb) script 176 >>> wp_count = 0 177 >>> quit() 178 179 )" 180 "Final Note: A warning that no watchpoint command was generated when there \ 181 are no syntax errors may indicate that a function was declared but never called."); 182 183 CommandArgumentEntry arg; 184 CommandArgumentData wp_id_arg; 185 186 // Define the first (and only) variant of this arg. 187 wp_id_arg.arg_type = eArgTypeWatchpointID; 188 wp_id_arg.arg_repetition = eArgRepeatPlain; 189 190 // There is only one variant this argument could be; put it into the 191 // argument entry. 192 arg.push_back(wp_id_arg); 193 194 // Push the data for the first argument into the m_arguments vector. 195 m_arguments.push_back(arg); 196 } 197 198 ~CommandObjectWatchpointCommandAdd() override = default; 199 200 Options *GetOptions() override { return &m_options; } 201 202 void IOHandlerActivated(IOHandler &io_handler, bool interactive) override { 203 StreamFileSP output_sp(io_handler.GetOutputStreamFile()); 204 if (output_sp && interactive) { 205 output_sp->PutCString( 206 "Enter your debugger command(s). Type 'DONE' to end.\n"); 207 output_sp->Flush(); 208 } 209 } 210 211 void IOHandlerInputComplete(IOHandler &io_handler, 212 std::string &line) override { 213 io_handler.SetIsDone(true); 214 215 // The WatchpointOptions object is owned by the watchpoint or watchpoint 216 // location 217 WatchpointOptions *wp_options = 218 (WatchpointOptions *)io_handler.GetUserData(); 219 if (wp_options) { 220 std::unique_ptr<WatchpointOptions::CommandData> data_up( 221 new WatchpointOptions::CommandData()); 222 if (data_up) { 223 data_up->user_source.SplitIntoLines(line); 224 auto baton_sp = std::make_shared<WatchpointOptions::CommandBaton>( 225 std::move(data_up)); 226 wp_options->SetCallback(WatchpointOptionsCallbackFunction, baton_sp); 227 } 228 } 229 } 230 231 void CollectDataForWatchpointCommandCallback(WatchpointOptions *wp_options, 232 CommandReturnObject &result) { 233 m_interpreter.GetLLDBCommandsFromIOHandler( 234 "> ", // Prompt 235 *this, // IOHandlerDelegate 236 true, // Run IOHandler in async mode 237 wp_options); // Baton for the "io_handler" that will be passed back into 238 // our IOHandlerDelegate functions 239 } 240 241 /// Set a one-liner as the callback for the watchpoint. 242 void SetWatchpointCommandCallback(WatchpointOptions *wp_options, 243 const char *oneliner) { 244 std::unique_ptr<WatchpointOptions::CommandData> data_up( 245 new WatchpointOptions::CommandData()); 246 247 // It's necessary to set both user_source and script_source to the 248 // oneliner. The former is used to generate callback description (as in 249 // watchpoint command list) while the latter is used for Python to 250 // interpret during the actual callback. 251 data_up->user_source.AppendString(oneliner); 252 data_up->script_source.assign(oneliner); 253 data_up->stop_on_error = m_options.m_stop_on_error; 254 255 auto baton_sp = 256 std::make_shared<WatchpointOptions::CommandBaton>(std::move(data_up)); 257 wp_options->SetCallback(WatchpointOptionsCallbackFunction, baton_sp); 258 } 259 260 static bool 261 WatchpointOptionsCallbackFunction(void *baton, 262 StoppointCallbackContext *context, 263 lldb::user_id_t watch_id) { 264 bool ret_value = true; 265 if (baton == nullptr) 266 return true; 267 268 WatchpointOptions::CommandData *data = 269 (WatchpointOptions::CommandData *)baton; 270 StringList &commands = data->user_source; 271 272 if (commands.GetSize() > 0) { 273 ExecutionContext exe_ctx(context->exe_ctx_ref); 274 Target *target = exe_ctx.GetTargetPtr(); 275 if (target) { 276 CommandReturnObject result; 277 Debugger &debugger = target->GetDebugger(); 278 // Rig up the results secondary output stream to the debugger's, so the 279 // output will come out synchronously if the debugger is set up that 280 // way. 281 282 StreamSP output_stream(debugger.GetAsyncOutputStream()); 283 StreamSP error_stream(debugger.GetAsyncErrorStream()); 284 result.SetImmediateOutputStream(output_stream); 285 result.SetImmediateErrorStream(error_stream); 286 287 CommandInterpreterRunOptions options; 288 options.SetStopOnContinue(true); 289 options.SetStopOnError(data->stop_on_error); 290 options.SetEchoCommands(false); 291 options.SetPrintResults(true); 292 options.SetPrintErrors(true); 293 options.SetAddToHistory(false); 294 295 debugger.GetCommandInterpreter().HandleCommands(commands, &exe_ctx, 296 options, result); 297 result.GetImmediateOutputStream()->Flush(); 298 result.GetImmediateErrorStream()->Flush(); 299 } 300 } 301 return ret_value; 302 } 303 304 class CommandOptions : public Options { 305 public: 306 CommandOptions() 307 : Options(), m_use_commands(false), m_use_script_language(false), 308 m_script_language(eScriptLanguageNone), m_use_one_liner(false), 309 m_one_liner(), m_function_name() {} 310 311 ~CommandOptions() override = default; 312 313 Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg, 314 ExecutionContext *execution_context) override { 315 Status error; 316 const int short_option = m_getopt_table[option_idx].val; 317 318 switch (short_option) { 319 case 'o': 320 m_use_one_liner = true; 321 m_one_liner = option_arg; 322 break; 323 324 case 's': 325 m_script_language = (lldb::ScriptLanguage)OptionArgParser::ToOptionEnum( 326 option_arg, GetDefinitions()[option_idx].enum_values, 327 eScriptLanguageNone, error); 328 329 m_use_script_language = (m_script_language == eScriptLanguagePython || 330 m_script_language == eScriptLanguageDefault); 331 break; 332 333 case 'e': { 334 bool success = false; 335 m_stop_on_error = 336 OptionArgParser::ToBoolean(option_arg, false, &success); 337 if (!success) 338 error.SetErrorStringWithFormat( 339 "invalid value for stop-on-error: \"%s\"", 340 option_arg.str().c_str()); 341 } break; 342 343 case 'F': 344 m_use_one_liner = false; 345 m_use_script_language = true; 346 m_function_name.assign(option_arg); 347 break; 348 349 default: 350 break; 351 } 352 return error; 353 } 354 355 void OptionParsingStarting(ExecutionContext *execution_context) override { 356 m_use_commands = true; 357 m_use_script_language = false; 358 m_script_language = eScriptLanguageNone; 359 360 m_use_one_liner = false; 361 m_stop_on_error = true; 362 m_one_liner.clear(); 363 m_function_name.clear(); 364 } 365 366 llvm::ArrayRef<OptionDefinition> GetDefinitions() override { 367 return llvm::makeArrayRef(g_watchpoint_command_add_options); 368 } 369 370 // Instance variables to hold the values for command options. 371 372 bool m_use_commands; 373 bool m_use_script_language; 374 lldb::ScriptLanguage m_script_language; 375 376 // Instance variables to hold the values for one_liner options. 377 bool m_use_one_liner; 378 std::string m_one_liner; 379 bool m_stop_on_error; 380 std::string m_function_name; 381 }; 382 383 protected: 384 bool DoExecute(Args &command, CommandReturnObject &result) override { 385 Target *target = GetDebugger().GetSelectedTarget().get(); 386 387 if (target == nullptr) { 388 result.AppendError("There is not a current executable; there are no " 389 "watchpoints to which to add commands"); 390 result.SetStatus(eReturnStatusFailed); 391 return false; 392 } 393 394 const WatchpointList &watchpoints = target->GetWatchpointList(); 395 size_t num_watchpoints = watchpoints.GetSize(); 396 397 if (num_watchpoints == 0) { 398 result.AppendError("No watchpoints exist to have commands added"); 399 result.SetStatus(eReturnStatusFailed); 400 return false; 401 } 402 403 if (!m_options.m_use_script_language && 404 !m_options.m_function_name.empty()) { 405 result.AppendError("need to enable scripting to have a function run as a " 406 "watchpoint command"); 407 result.SetStatus(eReturnStatusFailed); 408 return false; 409 } 410 411 std::vector<uint32_t> valid_wp_ids; 412 if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(target, command, 413 valid_wp_ids)) { 414 result.AppendError("Invalid watchpoints specification."); 415 result.SetStatus(eReturnStatusFailed); 416 return false; 417 } 418 419 result.SetStatus(eReturnStatusSuccessFinishNoResult); 420 const size_t count = valid_wp_ids.size(); 421 for (size_t i = 0; i < count; ++i) { 422 uint32_t cur_wp_id = valid_wp_ids.at(i); 423 if (cur_wp_id != LLDB_INVALID_WATCH_ID) { 424 Watchpoint *wp = target->GetWatchpointList().FindByID(cur_wp_id).get(); 425 // Sanity check wp first. 426 if (wp == nullptr) 427 continue; 428 429 WatchpointOptions *wp_options = wp->GetOptions(); 430 // Skip this watchpoint if wp_options is not good. 431 if (wp_options == nullptr) 432 continue; 433 434 // If we are using script language, get the script interpreter in order 435 // to set or collect command callback. Otherwise, call the methods 436 // associated with this object. 437 if (m_options.m_use_script_language) { 438 // Special handling for one-liner specified inline. 439 if (m_options.m_use_one_liner) { 440 GetDebugger().GetScriptInterpreter()->SetWatchpointCommandCallback( 441 wp_options, m_options.m_one_liner.c_str()); 442 } 443 // Special handling for using a Python function by name instead of 444 // extending the watchpoint callback data structures, we just 445 // automatize what the user would do manually: make their watchpoint 446 // command be a function call 447 else if (!m_options.m_function_name.empty()) { 448 std::string oneliner(m_options.m_function_name); 449 oneliner += "(frame, wp, internal_dict)"; 450 GetDebugger().GetScriptInterpreter()->SetWatchpointCommandCallback( 451 wp_options, oneliner.c_str()); 452 } else { 453 GetDebugger() 454 .GetScriptInterpreter() 455 ->CollectDataForWatchpointCommandCallback(wp_options, result); 456 } 457 } else { 458 // Special handling for one-liner specified inline. 459 if (m_options.m_use_one_liner) 460 SetWatchpointCommandCallback(wp_options, 461 m_options.m_one_liner.c_str()); 462 else 463 CollectDataForWatchpointCommandCallback(wp_options, result); 464 } 465 } 466 } 467 468 return result.Succeeded(); 469 } 470 471 private: 472 CommandOptions m_options; 473 }; 474 475 // CommandObjectWatchpointCommandDelete 476 477 class CommandObjectWatchpointCommandDelete : public CommandObjectParsed { 478 public: 479 CommandObjectWatchpointCommandDelete(CommandInterpreter &interpreter) 480 : CommandObjectParsed(interpreter, "delete", 481 "Delete the set of commands from a watchpoint.", 482 nullptr) { 483 CommandArgumentEntry arg; 484 CommandArgumentData wp_id_arg; 485 486 // Define the first (and only) variant of this arg. 487 wp_id_arg.arg_type = eArgTypeWatchpointID; 488 wp_id_arg.arg_repetition = eArgRepeatPlain; 489 490 // There is only one variant this argument could be; put it into the 491 // argument entry. 492 arg.push_back(wp_id_arg); 493 494 // Push the data for the first argument into the m_arguments vector. 495 m_arguments.push_back(arg); 496 } 497 498 ~CommandObjectWatchpointCommandDelete() override = default; 499 500 protected: 501 bool DoExecute(Args &command, CommandReturnObject &result) override { 502 Target *target = GetDebugger().GetSelectedTarget().get(); 503 504 if (target == nullptr) { 505 result.AppendError("There is not a current executable; there are no " 506 "watchpoints from which to delete commands"); 507 result.SetStatus(eReturnStatusFailed); 508 return false; 509 } 510 511 const WatchpointList &watchpoints = target->GetWatchpointList(); 512 size_t num_watchpoints = watchpoints.GetSize(); 513 514 if (num_watchpoints == 0) { 515 result.AppendError("No watchpoints exist to have commands deleted"); 516 result.SetStatus(eReturnStatusFailed); 517 return false; 518 } 519 520 if (command.GetArgumentCount() == 0) { 521 result.AppendError( 522 "No watchpoint specified from which to delete the commands"); 523 result.SetStatus(eReturnStatusFailed); 524 return false; 525 } 526 527 std::vector<uint32_t> valid_wp_ids; 528 if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(target, command, 529 valid_wp_ids)) { 530 result.AppendError("Invalid watchpoints specification."); 531 result.SetStatus(eReturnStatusFailed); 532 return false; 533 } 534 535 result.SetStatus(eReturnStatusSuccessFinishNoResult); 536 const size_t count = valid_wp_ids.size(); 537 for (size_t i = 0; i < count; ++i) { 538 uint32_t cur_wp_id = valid_wp_ids.at(i); 539 if (cur_wp_id != LLDB_INVALID_WATCH_ID) { 540 Watchpoint *wp = target->GetWatchpointList().FindByID(cur_wp_id).get(); 541 if (wp) 542 wp->ClearCallback(); 543 } else { 544 result.AppendErrorWithFormat("Invalid watchpoint ID: %u.\n", cur_wp_id); 545 result.SetStatus(eReturnStatusFailed); 546 return false; 547 } 548 } 549 return result.Succeeded(); 550 } 551 }; 552 553 // CommandObjectWatchpointCommandList 554 555 class CommandObjectWatchpointCommandList : public CommandObjectParsed { 556 public: 557 CommandObjectWatchpointCommandList(CommandInterpreter &interpreter) 558 : CommandObjectParsed(interpreter, "list", "List the script or set of " 559 "commands to be executed when " 560 "the watchpoint is hit.", 561 nullptr) { 562 CommandArgumentEntry arg; 563 CommandArgumentData wp_id_arg; 564 565 // Define the first (and only) variant of this arg. 566 wp_id_arg.arg_type = eArgTypeWatchpointID; 567 wp_id_arg.arg_repetition = eArgRepeatPlain; 568 569 // There is only one variant this argument could be; put it into the 570 // argument entry. 571 arg.push_back(wp_id_arg); 572 573 // Push the data for the first argument into the m_arguments vector. 574 m_arguments.push_back(arg); 575 } 576 577 ~CommandObjectWatchpointCommandList() override = default; 578 579 protected: 580 bool DoExecute(Args &command, CommandReturnObject &result) override { 581 Target *target = GetDebugger().GetSelectedTarget().get(); 582 583 if (target == nullptr) { 584 result.AppendError("There is not a current executable; there are no " 585 "watchpoints for which to list commands"); 586 result.SetStatus(eReturnStatusFailed); 587 return false; 588 } 589 590 const WatchpointList &watchpoints = target->GetWatchpointList(); 591 size_t num_watchpoints = watchpoints.GetSize(); 592 593 if (num_watchpoints == 0) { 594 result.AppendError("No watchpoints exist for which to list commands"); 595 result.SetStatus(eReturnStatusFailed); 596 return false; 597 } 598 599 if (command.GetArgumentCount() == 0) { 600 result.AppendError( 601 "No watchpoint specified for which to list the commands"); 602 result.SetStatus(eReturnStatusFailed); 603 return false; 604 } 605 606 std::vector<uint32_t> valid_wp_ids; 607 if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(target, command, 608 valid_wp_ids)) { 609 result.AppendError("Invalid watchpoints specification."); 610 result.SetStatus(eReturnStatusFailed); 611 return false; 612 } 613 614 result.SetStatus(eReturnStatusSuccessFinishNoResult); 615 const size_t count = valid_wp_ids.size(); 616 for (size_t i = 0; i < count; ++i) { 617 uint32_t cur_wp_id = valid_wp_ids.at(i); 618 if (cur_wp_id != LLDB_INVALID_WATCH_ID) { 619 Watchpoint *wp = target->GetWatchpointList().FindByID(cur_wp_id).get(); 620 621 if (wp) { 622 const WatchpointOptions *wp_options = wp->GetOptions(); 623 if (wp_options) { 624 // Get the callback baton associated with the current watchpoint. 625 const Baton *baton = wp_options->GetBaton(); 626 if (baton) { 627 result.GetOutputStream().Printf("Watchpoint %u:\n", cur_wp_id); 628 result.GetOutputStream().IndentMore(); 629 baton->GetDescription(&result.GetOutputStream(), 630 eDescriptionLevelFull); 631 result.GetOutputStream().IndentLess(); 632 } else { 633 result.AppendMessageWithFormat( 634 "Watchpoint %u does not have an associated command.\n", 635 cur_wp_id); 636 } 637 } 638 result.SetStatus(eReturnStatusSuccessFinishResult); 639 } else { 640 result.AppendErrorWithFormat("Invalid watchpoint ID: %u.\n", 641 cur_wp_id); 642 result.SetStatus(eReturnStatusFailed); 643 } 644 } 645 } 646 647 return result.Succeeded(); 648 } 649 }; 650 651 // CommandObjectWatchpointCommand 652 653 CommandObjectWatchpointCommand::CommandObjectWatchpointCommand( 654 CommandInterpreter &interpreter) 655 : CommandObjectMultiword( 656 interpreter, "command", 657 "Commands for adding, removing and examining LLDB commands " 658 "executed when the watchpoint is hit (watchpoint 'commands').", 659 "command <sub-command> [<sub-command-options>] <watchpoint-id>") { 660 CommandObjectSP add_command_object( 661 new CommandObjectWatchpointCommandAdd(interpreter)); 662 CommandObjectSP delete_command_object( 663 new CommandObjectWatchpointCommandDelete(interpreter)); 664 CommandObjectSP list_command_object( 665 new CommandObjectWatchpointCommandList(interpreter)); 666 667 add_command_object->SetCommandName("watchpoint command add"); 668 delete_command_object->SetCommandName("watchpoint command delete"); 669 list_command_object->SetCommandName("watchpoint command list"); 670 671 LoadSubCommand("add", add_command_object); 672 LoadSubCommand("delete", delete_command_object); 673 LoadSubCommand("list", list_command_object); 674 } 675 676 CommandObjectWatchpointCommand::~CommandObjectWatchpointCommand() = default; 677