1 //===-- SBCommandInterpreter.cpp --------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // C Includes
11 // C++ Includes
12 // Other libraries and framework includes
13 // Project includes
14 #include "lldb/lldb-types.h"
15 
16 #include "lldb/Core/Listener.h"
17 #include "lldb/Interpreter/CommandInterpreter.h"
18 #include "lldb/Interpreter/CommandObjectMultiword.h"
19 #include "lldb/Interpreter/CommandReturnObject.h"
20 #include "lldb/Target/Target.h"
21 
22 #include "lldb/API/SBBroadcaster.h"
23 #include "lldb/API/SBCommandInterpreter.h"
24 #include "lldb/API/SBCommandReturnObject.h"
25 #include "lldb/API/SBEvent.h"
26 #include "lldb/API/SBExecutionContext.h"
27 #include "lldb/API/SBListener.h"
28 #include "lldb/API/SBProcess.h"
29 #include "lldb/API/SBStream.h"
30 #include "lldb/API/SBStringList.h"
31 #include "lldb/API/SBTarget.h"
32 
33 using namespace lldb;
34 using namespace lldb_private;
35 
36 SBCommandInterpreterRunOptions::SBCommandInterpreterRunOptions() {
37   m_opaque_up.reset(new CommandInterpreterRunOptions());
38 }
39 
40 SBCommandInterpreterRunOptions::~SBCommandInterpreterRunOptions() = default;
41 
42 bool SBCommandInterpreterRunOptions::GetStopOnContinue() const {
43   return m_opaque_up->GetStopOnContinue();
44 }
45 
46 void SBCommandInterpreterRunOptions::SetStopOnContinue(bool stop_on_continue) {
47   m_opaque_up->SetStopOnContinue(stop_on_continue);
48 }
49 
50 bool SBCommandInterpreterRunOptions::GetStopOnError() const {
51   return m_opaque_up->GetStopOnError();
52 }
53 
54 void SBCommandInterpreterRunOptions::SetStopOnError(bool stop_on_error) {
55   m_opaque_up->SetStopOnError(stop_on_error);
56 }
57 
58 bool SBCommandInterpreterRunOptions::GetStopOnCrash() const {
59   return m_opaque_up->GetStopOnCrash();
60 }
61 
62 void SBCommandInterpreterRunOptions::SetStopOnCrash(bool stop_on_crash) {
63   m_opaque_up->SetStopOnCrash(stop_on_crash);
64 }
65 
66 bool SBCommandInterpreterRunOptions::GetEchoCommands() const {
67   return m_opaque_up->GetEchoCommands();
68 }
69 
70 void SBCommandInterpreterRunOptions::SetEchoCommands(bool echo_commands) {
71   m_opaque_up->SetEchoCommands(echo_commands);
72 }
73 
74 bool SBCommandInterpreterRunOptions::GetPrintResults() const {
75   return m_opaque_up->GetPrintResults();
76 }
77 
78 void SBCommandInterpreterRunOptions::SetPrintResults(bool print_results) {
79   m_opaque_up->SetPrintResults(print_results);
80 }
81 
82 bool SBCommandInterpreterRunOptions::GetAddToHistory() const {
83   return m_opaque_up->GetAddToHistory();
84 }
85 
86 void SBCommandInterpreterRunOptions::SetAddToHistory(bool add_to_history) {
87   m_opaque_up->SetAddToHistory(add_to_history);
88 }
89 
90 lldb_private::CommandInterpreterRunOptions *
91 SBCommandInterpreterRunOptions::get() const {
92   return m_opaque_up.get();
93 }
94 
95 lldb_private::CommandInterpreterRunOptions &
96 SBCommandInterpreterRunOptions::ref() const {
97   return *m_opaque_up.get();
98 }
99 
100 class CommandPluginInterfaceImplementation : public CommandObjectParsed {
101 public:
102   CommandPluginInterfaceImplementation(CommandInterpreter &interpreter,
103                                        const char *name,
104                                        lldb::SBCommandPluginInterface *backend,
105                                        const char *help = nullptr,
106                                        const char *syntax = nullptr,
107                                        uint32_t flags = 0)
108       : CommandObjectParsed(interpreter, name, help, syntax, flags),
109         m_backend(backend) {}
110 
111   bool IsRemovable() const override { return true; }
112 
113 protected:
114   bool DoExecute(Args &command, CommandReturnObject &result) override {
115     SBCommandReturnObject sb_return(&result);
116     SBCommandInterpreter sb_interpreter(&m_interpreter);
117     SBDebugger debugger_sb(m_interpreter.GetDebugger().shared_from_this());
118     bool ret = m_backend->DoExecute(
119         debugger_sb, (char **)command.GetArgumentVector(), sb_return);
120     sb_return.Release();
121     return ret;
122   }
123   std::shared_ptr<lldb::SBCommandPluginInterface> m_backend;
124 };
125 
126 SBCommandInterpreter::SBCommandInterpreter(CommandInterpreter *interpreter)
127     : m_opaque_ptr(interpreter) {
128   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
129 
130   if (log)
131     log->Printf("SBCommandInterpreter::SBCommandInterpreter (interpreter=%p)"
132                 " => SBCommandInterpreter(%p)",
133                 static_cast<void *>(interpreter),
134                 static_cast<void *>(m_opaque_ptr));
135 }
136 
137 SBCommandInterpreter::SBCommandInterpreter(const SBCommandInterpreter &rhs)
138     : m_opaque_ptr(rhs.m_opaque_ptr) {}
139 
140 SBCommandInterpreter::~SBCommandInterpreter() = default;
141 
142 const SBCommandInterpreter &SBCommandInterpreter::
143 operator=(const SBCommandInterpreter &rhs) {
144   m_opaque_ptr = rhs.m_opaque_ptr;
145   return *this;
146 }
147 
148 bool SBCommandInterpreter::IsValid() const { return m_opaque_ptr != nullptr; }
149 
150 bool SBCommandInterpreter::CommandExists(const char *cmd) {
151   return (((cmd != nullptr) && IsValid()) ? m_opaque_ptr->CommandExists(cmd)
152                                           : false);
153 }
154 
155 bool SBCommandInterpreter::AliasExists(const char *cmd) {
156   return (((cmd != nullptr) && IsValid()) ? m_opaque_ptr->AliasExists(cmd)
157                                           : false);
158 }
159 
160 bool SBCommandInterpreter::IsActive() {
161   return (IsValid() ? m_opaque_ptr->IsActive() : false);
162 }
163 
164 bool SBCommandInterpreter::WasInterrupted() const {
165   return (IsValid() ? m_opaque_ptr->WasInterrupted() : false);
166 }
167 
168 const char *SBCommandInterpreter::GetIOHandlerControlSequence(char ch) {
169   return (IsValid()
170               ? m_opaque_ptr->GetDebugger()
171                     .GetTopIOHandlerControlSequence(ch)
172                     .GetCString()
173               : nullptr);
174 }
175 
176 lldb::ReturnStatus
177 SBCommandInterpreter::HandleCommand(const char *command_line,
178                                     SBCommandReturnObject &result,
179                                     bool add_to_history) {
180   SBExecutionContext sb_exe_ctx;
181   return HandleCommand(command_line, sb_exe_ctx, result, add_to_history);
182 }
183 
184 lldb::ReturnStatus SBCommandInterpreter::HandleCommand(
185     const char *command_line, SBExecutionContext &override_context,
186     SBCommandReturnObject &result, bool add_to_history) {
187   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
188 
189   if (log)
190     log->Printf("SBCommandInterpreter(%p)::HandleCommand (command=\"%s\", "
191                 "SBCommandReturnObject(%p), add_to_history=%i)",
192                 static_cast<void *>(m_opaque_ptr), command_line,
193                 static_cast<void *>(result.get()), add_to_history);
194 
195   ExecutionContext ctx, *ctx_ptr;
196   if (override_context.get()) {
197     ctx = override_context.get()->Lock(true);
198     ctx_ptr = &ctx;
199   } else
200     ctx_ptr = nullptr;
201 
202   result.Clear();
203   if (command_line && IsValid()) {
204     result.ref().SetInteractive(false);
205     m_opaque_ptr->HandleCommand(command_line,
206                                 add_to_history ? eLazyBoolYes : eLazyBoolNo,
207                                 result.ref(), ctx_ptr);
208   } else {
209     result->AppendError(
210         "SBCommandInterpreter or the command line is not valid");
211     result->SetStatus(eReturnStatusFailed);
212   }
213 
214   // We need to get the value again, in case the command disabled the log!
215   log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API);
216   if (log) {
217     SBStream sstr;
218     result.GetDescription(sstr);
219     log->Printf("SBCommandInterpreter(%p)::HandleCommand (command=\"%s\", "
220                 "SBCommandReturnObject(%p): %s, add_to_history=%i) => %i",
221                 static_cast<void *>(m_opaque_ptr), command_line,
222                 static_cast<void *>(result.get()), sstr.GetData(),
223                 add_to_history, result.GetStatus());
224   }
225 
226   return result.GetStatus();
227 }
228 
229 void SBCommandInterpreter::HandleCommandsFromFile(
230     lldb::SBFileSpec &file, lldb::SBExecutionContext &override_context,
231     lldb::SBCommandInterpreterRunOptions &options,
232     lldb::SBCommandReturnObject result) {
233   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
234 
235   if (log) {
236     SBStream s;
237     file.GetDescription(s);
238     log->Printf("SBCommandInterpreter(%p)::HandleCommandsFromFile "
239                 "(file=\"%s\", SBCommandReturnObject(%p))",
240                 static_cast<void *>(m_opaque_ptr), s.GetData(),
241                 static_cast<void *>(result.get()));
242   }
243 
244   if (!IsValid()) {
245     result->AppendError("SBCommandInterpreter is not valid.");
246     result->SetStatus(eReturnStatusFailed);
247     return;
248   }
249 
250   if (!file.IsValid()) {
251     SBStream s;
252     file.GetDescription(s);
253     result->AppendErrorWithFormat("File is not valid: %s.", s.GetData());
254     result->SetStatus(eReturnStatusFailed);
255   }
256 
257   FileSpec tmp_spec = file.ref();
258   ExecutionContext ctx, *ctx_ptr;
259   if (override_context.get()) {
260     ctx = override_context.get()->Lock(true);
261     ctx_ptr = &ctx;
262   } else
263     ctx_ptr = nullptr;
264 
265   m_opaque_ptr->HandleCommandsFromFile(tmp_spec, ctx_ptr, options.ref(),
266                                        result.ref());
267 }
268 
269 int SBCommandInterpreter::HandleCompletion(
270     const char *current_line, const char *cursor, const char *last_char,
271     int match_start_point, int max_return_elements, SBStringList &matches) {
272   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
273   int num_completions = 0;
274 
275   // Sanity check the arguments that are passed in: cursor & last_char have to
276   // be within the current_line.
277   if (current_line == nullptr || cursor == nullptr || last_char == nullptr)
278     return 0;
279 
280   if (cursor < current_line || last_char < current_line)
281     return 0;
282 
283   size_t current_line_size = strlen(current_line);
284   if (cursor - current_line > static_cast<ptrdiff_t>(current_line_size) ||
285       last_char - current_line > static_cast<ptrdiff_t>(current_line_size))
286     return 0;
287 
288   if (log)
289     log->Printf("SBCommandInterpreter(%p)::HandleCompletion "
290                 "(current_line=\"%s\", cursor at: %" PRId64
291                 ", last char at: %" PRId64
292                 ", match_start_point: %d, max_return_elements: %d)",
293                 static_cast<void *>(m_opaque_ptr), current_line,
294                 static_cast<uint64_t>(cursor - current_line),
295                 static_cast<uint64_t>(last_char - current_line),
296                 match_start_point, max_return_elements);
297 
298   if (IsValid()) {
299     lldb_private::StringList lldb_matches;
300     num_completions = m_opaque_ptr->HandleCompletion(
301         current_line, cursor, last_char, match_start_point, max_return_elements,
302         lldb_matches);
303 
304     SBStringList temp_list(&lldb_matches);
305     matches.AppendList(temp_list);
306   }
307   if (log)
308     log->Printf(
309         "SBCommandInterpreter(%p)::HandleCompletion - Found %d completions.",
310         static_cast<void *>(m_opaque_ptr), num_completions);
311 
312   return num_completions;
313 }
314 
315 int SBCommandInterpreter::HandleCompletion(const char *current_line,
316                                            uint32_t cursor_pos,
317                                            int match_start_point,
318                                            int max_return_elements,
319                                            lldb::SBStringList &matches) {
320   const char *cursor = current_line + cursor_pos;
321   const char *last_char = current_line + strlen(current_line);
322   return HandleCompletion(current_line, cursor, last_char, match_start_point,
323                           max_return_elements, matches);
324 }
325 
326 bool SBCommandInterpreter::HasCommands() {
327   return (IsValid() ? m_opaque_ptr->HasCommands() : false);
328 }
329 
330 bool SBCommandInterpreter::HasAliases() {
331   return (IsValid() ? m_opaque_ptr->HasAliases() : false);
332 }
333 
334 bool SBCommandInterpreter::HasAliasOptions() {
335   return (IsValid() ? m_opaque_ptr->HasAliasOptions() : false);
336 }
337 
338 SBProcess SBCommandInterpreter::GetProcess() {
339   SBProcess sb_process;
340   ProcessSP process_sp;
341   if (IsValid()) {
342     TargetSP target_sp(m_opaque_ptr->GetDebugger().GetSelectedTarget());
343     if (target_sp) {
344       std::lock_guard<std::recursive_mutex> guard(target_sp->GetAPIMutex());
345       process_sp = target_sp->GetProcessSP();
346       sb_process.SetSP(process_sp);
347     }
348   }
349   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
350 
351   if (log)
352     log->Printf("SBCommandInterpreter(%p)::GetProcess () => SBProcess(%p)",
353                 static_cast<void *>(m_opaque_ptr),
354                 static_cast<void *>(process_sp.get()));
355 
356   return sb_process;
357 }
358 
359 SBDebugger SBCommandInterpreter::GetDebugger() {
360   SBDebugger sb_debugger;
361   if (IsValid())
362     sb_debugger.reset(m_opaque_ptr->GetDebugger().shared_from_this());
363   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
364 
365   if (log)
366     log->Printf("SBCommandInterpreter(%p)::GetDebugger () => SBDebugger(%p)",
367                 static_cast<void *>(m_opaque_ptr),
368                 static_cast<void *>(sb_debugger.get()));
369 
370   return sb_debugger;
371 }
372 
373 bool SBCommandInterpreter::GetPromptOnQuit() {
374   return (IsValid() ? m_opaque_ptr->GetPromptOnQuit() : false);
375 }
376 
377 void SBCommandInterpreter::SetPromptOnQuit(bool b) {
378   if (IsValid())
379     m_opaque_ptr->SetPromptOnQuit(b);
380 }
381 
382 void SBCommandInterpreter::AllowExitCodeOnQuit(bool allow) {
383   if (m_opaque_ptr)
384     m_opaque_ptr->AllowExitCodeOnQuit(allow);
385 }
386 
387 bool SBCommandInterpreter::HasCustomQuitExitCode() {
388   bool exited = false;
389   if (m_opaque_ptr)
390     m_opaque_ptr->GetQuitExitCode(exited);
391   return exited;
392 }
393 
394 int SBCommandInterpreter::GetQuitStatus() {
395   bool exited = false;
396   return (m_opaque_ptr ? m_opaque_ptr->GetQuitExitCode(exited) : 0);
397 }
398 
399 void SBCommandInterpreter::ResolveCommand(const char *command_line,
400                                           SBCommandReturnObject &result) {
401   result.Clear();
402   if (command_line && IsValid()) {
403     m_opaque_ptr->ResolveCommand(command_line, result.ref());
404   } else {
405     result->AppendError(
406         "SBCommandInterpreter or the command line is not valid");
407     result->SetStatus(eReturnStatusFailed);
408   }
409 }
410 
411 CommandInterpreter *SBCommandInterpreter::get() { return m_opaque_ptr; }
412 
413 CommandInterpreter &SBCommandInterpreter::ref() {
414   assert(m_opaque_ptr);
415   return *m_opaque_ptr;
416 }
417 
418 void SBCommandInterpreter::reset(
419     lldb_private::CommandInterpreter *interpreter) {
420   m_opaque_ptr = interpreter;
421 }
422 
423 void SBCommandInterpreter::SourceInitFileInHomeDirectory(
424     SBCommandReturnObject &result) {
425   result.Clear();
426   if (IsValid()) {
427     TargetSP target_sp(m_opaque_ptr->GetDebugger().GetSelectedTarget());
428     std::unique_lock<std::recursive_mutex> lock;
429     if (target_sp)
430       lock = std::unique_lock<std::recursive_mutex>(target_sp->GetAPIMutex());
431     m_opaque_ptr->SourceInitFile(false, result.ref());
432   } else {
433     result->AppendError("SBCommandInterpreter is not valid");
434     result->SetStatus(eReturnStatusFailed);
435   }
436   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
437 
438   if (log)
439     log->Printf("SBCommandInterpreter(%p)::SourceInitFileInHomeDirectory "
440                 "(&SBCommandReturnObject(%p))",
441                 static_cast<void *>(m_opaque_ptr),
442                 static_cast<void *>(result.get()));
443 }
444 
445 void SBCommandInterpreter::SourceInitFileInCurrentWorkingDirectory(
446     SBCommandReturnObject &result) {
447   result.Clear();
448   if (IsValid()) {
449     TargetSP target_sp(m_opaque_ptr->GetDebugger().GetSelectedTarget());
450     std::unique_lock<std::recursive_mutex> lock;
451     if (target_sp)
452       lock = std::unique_lock<std::recursive_mutex>(target_sp->GetAPIMutex());
453     m_opaque_ptr->SourceInitFile(true, result.ref());
454   } else {
455     result->AppendError("SBCommandInterpreter is not valid");
456     result->SetStatus(eReturnStatusFailed);
457   }
458   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
459 
460   if (log)
461     log->Printf(
462         "SBCommandInterpreter(%p)::SourceInitFileInCurrentWorkingDirectory "
463         "(&SBCommandReturnObject(%p))",
464         static_cast<void *>(m_opaque_ptr), static_cast<void *>(result.get()));
465 }
466 
467 SBBroadcaster SBCommandInterpreter::GetBroadcaster() {
468   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
469 
470   SBBroadcaster broadcaster(m_opaque_ptr, false);
471 
472   if (log)
473     log->Printf(
474         "SBCommandInterpreter(%p)::GetBroadcaster() => SBBroadcaster(%p)",
475         static_cast<void *>(m_opaque_ptr),
476         static_cast<void *>(broadcaster.get()));
477 
478   return broadcaster;
479 }
480 
481 const char *SBCommandInterpreter::GetBroadcasterClass() {
482   return CommandInterpreter::GetStaticBroadcasterClass().AsCString();
483 }
484 
485 const char *SBCommandInterpreter::GetArgumentTypeAsCString(
486     const lldb::CommandArgumentType arg_type) {
487   return CommandObject::GetArgumentTypeAsCString(arg_type);
488 }
489 
490 const char *SBCommandInterpreter::GetArgumentDescriptionAsCString(
491     const lldb::CommandArgumentType arg_type) {
492   return CommandObject::GetArgumentDescriptionAsCString(arg_type);
493 }
494 
495 bool SBCommandInterpreter::EventIsCommandInterpreterEvent(
496     const lldb::SBEvent &event) {
497   return event.GetBroadcasterClass() ==
498          SBCommandInterpreter::GetBroadcasterClass();
499 }
500 
501 bool SBCommandInterpreter::SetCommandOverrideCallback(
502     const char *command_name, lldb::CommandOverrideCallback callback,
503     void *baton) {
504   if (command_name && command_name[0] && IsValid()) {
505     llvm::StringRef command_name_str = command_name;
506     CommandObject *cmd_obj =
507         m_opaque_ptr->GetCommandObjectForCommand(command_name_str);
508     if (cmd_obj) {
509       assert(command_name_str.empty());
510       cmd_obj->SetOverrideCallback(callback, baton);
511       return true;
512     }
513   }
514   return false;
515 }
516 
517 lldb::SBCommand SBCommandInterpreter::AddMultiwordCommand(const char *name,
518                                                           const char *help) {
519   CommandObjectMultiword *new_command =
520       new CommandObjectMultiword(*m_opaque_ptr, name, help);
521   new_command->SetRemovable(true);
522   lldb::CommandObjectSP new_command_sp(new_command);
523   if (new_command_sp &&
524       m_opaque_ptr->AddUserCommand(name, new_command_sp, true))
525     return lldb::SBCommand(new_command_sp);
526   return lldb::SBCommand();
527 }
528 
529 lldb::SBCommand SBCommandInterpreter::AddCommand(
530     const char *name, lldb::SBCommandPluginInterface *impl, const char *help) {
531   lldb::CommandObjectSP new_command_sp;
532   new_command_sp.reset(new CommandPluginInterfaceImplementation(
533       *m_opaque_ptr, name, impl, help));
534 
535   if (new_command_sp &&
536       m_opaque_ptr->AddUserCommand(name, new_command_sp, true))
537     return lldb::SBCommand(new_command_sp);
538   return lldb::SBCommand();
539 }
540 
541 lldb::SBCommand
542 SBCommandInterpreter::AddCommand(const char *name,
543                                  lldb::SBCommandPluginInterface *impl,
544                                  const char *help, const char *syntax) {
545   lldb::CommandObjectSP new_command_sp;
546   new_command_sp.reset(new CommandPluginInterfaceImplementation(
547       *m_opaque_ptr, name, impl, help, syntax));
548 
549   if (new_command_sp &&
550       m_opaque_ptr->AddUserCommand(name, new_command_sp, true))
551     return lldb::SBCommand(new_command_sp);
552   return lldb::SBCommand();
553 }
554 
555 SBCommand::SBCommand() = default;
556 
557 SBCommand::SBCommand(lldb::CommandObjectSP cmd_sp) : m_opaque_sp(cmd_sp) {}
558 
559 bool SBCommand::IsValid() { return m_opaque_sp.get() != nullptr; }
560 
561 const char *SBCommand::GetName() {
562   return (IsValid() ? ConstString(m_opaque_sp->GetCommandName()).AsCString() : nullptr);
563 }
564 
565 const char *SBCommand::GetHelp() {
566   return (IsValid() ? ConstString(m_opaque_sp->GetHelp()).AsCString()
567                     : nullptr);
568 }
569 
570 const char *SBCommand::GetHelpLong() {
571   return (IsValid() ? ConstString(m_opaque_sp->GetHelpLong()).AsCString()
572                     : nullptr);
573 }
574 
575 void SBCommand::SetHelp(const char *help) {
576   if (IsValid())
577     m_opaque_sp->SetHelp(help);
578 }
579 
580 void SBCommand::SetHelpLong(const char *help) {
581   if (IsValid())
582     m_opaque_sp->SetHelpLong(help);
583 }
584 
585 lldb::SBCommand SBCommand::AddMultiwordCommand(const char *name,
586                                                const char *help) {
587   if (!IsValid())
588     return lldb::SBCommand();
589   if (!m_opaque_sp->IsMultiwordObject())
590     return lldb::SBCommand();
591   CommandObjectMultiword *new_command = new CommandObjectMultiword(
592       m_opaque_sp->GetCommandInterpreter(), name, help);
593   new_command->SetRemovable(true);
594   lldb::CommandObjectSP new_command_sp(new_command);
595   if (new_command_sp && m_opaque_sp->LoadSubCommand(name, new_command_sp))
596     return lldb::SBCommand(new_command_sp);
597   return lldb::SBCommand();
598 }
599 
600 lldb::SBCommand SBCommand::AddCommand(const char *name,
601                                       lldb::SBCommandPluginInterface *impl,
602                                       const char *help) {
603   if (!IsValid())
604     return lldb::SBCommand();
605   if (!m_opaque_sp->IsMultiwordObject())
606     return lldb::SBCommand();
607   lldb::CommandObjectSP new_command_sp;
608   new_command_sp.reset(new CommandPluginInterfaceImplementation(
609       m_opaque_sp->GetCommandInterpreter(), name, impl, help));
610   if (new_command_sp && m_opaque_sp->LoadSubCommand(name, new_command_sp))
611     return lldb::SBCommand(new_command_sp);
612   return lldb::SBCommand();
613 }
614 
615 lldb::SBCommand SBCommand::AddCommand(const char *name,
616                                       lldb::SBCommandPluginInterface *impl,
617                                       const char *help, const char *syntax) {
618   if (!IsValid())
619     return lldb::SBCommand();
620   if (!m_opaque_sp->IsMultiwordObject())
621     return lldb::SBCommand();
622   lldb::CommandObjectSP new_command_sp;
623   new_command_sp.reset(new CommandPluginInterfaceImplementation(
624       m_opaque_sp->GetCommandInterpreter(), name, impl, help, syntax));
625   if (new_command_sp && m_opaque_sp->LoadSubCommand(name, new_command_sp))
626     return lldb::SBCommand(new_command_sp);
627   return lldb::SBCommand();
628 }
629 
630 uint32_t SBCommand::GetFlags() {
631   return (IsValid() ? m_opaque_sp->GetFlags().Get() : 0);
632 }
633 
634 void SBCommand::SetFlags(uint32_t flags) {
635   if (IsValid())
636     m_opaque_sp->GetFlags().Set(flags);
637 }
638