1 //===-- CommandObject.h -----------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef liblldb_CommandObject_h_
11 #define liblldb_CommandObject_h_
19 // Other libraries and framework includes
21 #include "lldb/Utility/Flags.h"
23 #include "lldb/Interpreter/CommandCompletions.h"
24 #include "lldb/Interpreter/Options.h"
25 #include "lldb/Target/ExecutionContext.h"
26 #include "lldb/Utility/Args.h"
27 #include "lldb/Utility/CompletionRequest.h"
28 #include "lldb/Utility/StringList.h"
29 #include "lldb/lldb-private.h"
31 namespace lldb_private {
33 // This function really deals with CommandObjectLists, but we didn't make a
34 // CommandObjectList class, so I'm sticking it here. But we really should have
35 // such a class. Anyway, it looks up the commands in the map that match the
36 // partial string cmd_str, inserts the matches into matches, and returns the
39 template <typename ValueType>
40 int AddNamesMatchingPartialString(const std::map<std::string, ValueType> &in_map,
41 llvm::StringRef cmd_str, StringList &matches) {
44 const bool add_all = cmd_str.empty();
46 for (auto iter = in_map.begin(), end = in_map.end(); iter != end; iter++) {
47 if (add_all || (iter->first.find(cmd_str, 0) == 0)) {
49 matches.AppendString(iter->first.c_str());
56 template <typename ValueType>
57 size_t FindLongestCommandWord(std::map<std::string, ValueType> &dict) {
58 auto end = dict.end();
61 for (auto pos = dict.begin(); pos != end; ++pos) {
62 size_t len = pos->first.size();
71 typedef llvm::StringRef(ArgumentHelpCallbackFunction)();
73 struct ArgumentHelpCallback {
74 ArgumentHelpCallbackFunction *help_callback;
77 llvm::StringRef operator()() const { return (*help_callback)(); }
79 explicit operator bool() const { return (help_callback != nullptr); }
82 struct ArgumentTableEntry // Entries in the main argument information table
84 lldb::CommandArgumentType arg_type;
86 CommandCompletions::CommonCompletionTypes completion_type;
87 ArgumentHelpCallback help_function;
88 const char *help_text;
91 struct CommandArgumentData // Used to build individual command argument lists
93 lldb::CommandArgumentType arg_type;
94 ArgumentRepetitionType arg_repetition;
95 uint32_t arg_opt_set_association; // This arg might be associated only with
96 // some particular option set(s).
98 : arg_type(lldb::eArgTypeNone), arg_repetition(eArgRepeatPlain),
99 arg_opt_set_association(LLDB_OPT_SET_ALL) // By default, the arg
100 // associates to all option
105 typedef std::vector<CommandArgumentData>
106 CommandArgumentEntry; // Used to build individual command argument lists
108 static ArgumentTableEntry g_arguments_data
109 [lldb::eArgTypeLastArg]; // Main argument information table
111 typedef std::map<std::string, lldb::CommandObjectSP> CommandMap;
113 CommandObject(CommandInterpreter &interpreter, llvm::StringRef name,
114 llvm::StringRef help = "", llvm::StringRef syntax = "",
117 virtual ~CommandObject();
120 GetArgumentTypeAsCString(const lldb::CommandArgumentType arg_type);
123 GetArgumentDescriptionAsCString(const lldb::CommandArgumentType arg_type);
125 CommandInterpreter &GetCommandInterpreter() { return m_interpreter; }
127 virtual llvm::StringRef GetHelp();
129 virtual llvm::StringRef GetHelpLong();
131 virtual llvm::StringRef GetSyntax();
133 llvm::StringRef GetCommandName() const;
135 virtual void SetHelp(llvm::StringRef str);
137 virtual void SetHelpLong(llvm::StringRef str);
139 void SetSyntax(llvm::StringRef str);
141 // override this to return true if you want to enable the user to delete the
142 // Command object from the Command dictionary (aliases have their own
143 // deletion scheme, so they do not need to care about this)
144 virtual bool IsRemovable() const { return false; }
146 virtual bool IsMultiwordObject() { return false; }
148 virtual CommandObjectMultiword *GetAsMultiwordCommand() { return nullptr; }
150 virtual bool IsAlias() { return false; }
152 // override this to return true if your command is somehow a "dash-dash" form
153 // of some other command (e.g. po is expr -O --); this is a powerful hint to
154 // the help system that one cannot pass options to this command
155 virtual bool IsDashDashCommand() { return false; }
157 virtual lldb::CommandObjectSP GetSubcommandSP(llvm::StringRef sub_cmd,
158 StringList *matches = nullptr) {
159 return lldb::CommandObjectSP();
162 virtual CommandObject *GetSubcommandObject(llvm::StringRef sub_cmd,
163 StringList *matches = nullptr) {
167 virtual void AproposAllSubCommands(llvm::StringRef prefix,
168 llvm::StringRef search_word,
169 StringList &commands_found,
170 StringList &commands_help) {}
172 void FormatLongHelpText(Stream &output_strm, llvm::StringRef long_help);
174 void GenerateHelpText(CommandReturnObject &result);
176 virtual void GenerateHelpText(Stream &result);
178 // this is needed in order to allow the SBCommand class to transparently try
179 // and load subcommands - it will fail on anything but a multiword command,
180 // but it avoids us doing type checkings and casts
181 virtual bool LoadSubCommand(llvm::StringRef cmd_name,
182 const lldb::CommandObjectSP &command_obj) {
186 virtual bool WantsRawCommandString() = 0;
188 // By default, WantsCompletion = !WantsRawCommandString. Subclasses who want
189 // raw command string but desire, for example, argument completion should
190 // override this method to return true.
191 virtual bool WantsCompletion() { return !WantsRawCommandString(); }
193 virtual Options *GetOptions();
195 static const ArgumentTableEntry *GetArgumentTable();
197 static lldb::CommandArgumentType LookupArgumentName(llvm::StringRef arg_name);
199 static const ArgumentTableEntry *
200 FindArgumentDataByType(lldb::CommandArgumentType arg_type);
202 int GetNumArgumentEntries();
204 CommandArgumentEntry *GetArgumentEntryAtIndex(int idx);
206 static void GetArgumentHelp(Stream &str, lldb::CommandArgumentType arg_type,
207 CommandInterpreter &interpreter);
209 static const char *GetArgumentName(lldb::CommandArgumentType arg_type);
211 // Generates a nicely formatted command args string for help command output.
212 // By default, all possible args are taken into account, for example, '<expr
213 // | variable-name>'. This can be refined by passing a second arg specifying
214 // which option set(s) we are interested, which could then, for example,
215 // produce either '<expr>' or '<variable-name>'.
216 void GetFormattedCommandArguments(Stream &str,
217 uint32_t opt_set_mask = LLDB_OPT_SET_ALL);
219 bool IsPairType(ArgumentRepetitionType arg_repeat_type);
221 bool ParseOptions(Args &args, CommandReturnObject &result);
223 void SetCommandName(llvm::StringRef name);
225 //------------------------------------------------------------------
226 /// This default version handles calling option argument completions and then
227 /// calls HandleArgumentCompletion if the cursor is on an argument, not an
228 /// option. Don't override this method, override HandleArgumentCompletion
229 /// instead unless you have special reasons.
231 /// @param[in/out] request
232 /// The completion request that needs to be answered.
234 /// FIXME: This is the wrong return value, since we also need to make a
235 /// distinction between
236 /// total number of matches, and the window the user wants returned.
239 /// \btrue if we were in an option, \bfalse otherwise.
240 //------------------------------------------------------------------
241 virtual int HandleCompletion(CompletionRequest &request);
243 //------------------------------------------------------------------
244 /// The input array contains a parsed version of the line. The insertion
245 /// point is given by cursor_index (the index in input of the word containing
246 /// the cursor) and cursor_char_position (the position of the cursor in that
248 /// We've constructed the map of options and their arguments as well if that
249 /// is helpful for the completion.
251 /// @param[in/out] request
252 /// The completion request that needs to be answered.
254 /// FIXME: This is the wrong return value, since we also need to make a
255 /// distinction between
256 /// total number of matches, and the window the user wants returned.
259 /// The number of completions.
260 //------------------------------------------------------------------
262 HandleArgumentCompletion(CompletionRequest &request,
263 OptionElementVector &opt_element_vector) {
267 bool HelpTextContainsWord(llvm::StringRef search_word,
268 bool search_short_help = true,
269 bool search_long_help = true,
270 bool search_syntax = true,
271 bool search_options = true);
273 //------------------------------------------------------------------
274 /// The flags accessor.
277 /// A reference to the Flags member variable.
278 //------------------------------------------------------------------
279 Flags &GetFlags() { return m_flags; }
281 //------------------------------------------------------------------
282 /// The flags const accessor.
285 /// A const reference to the Flags member variable.
286 //------------------------------------------------------------------
287 const Flags &GetFlags() const { return m_flags; }
289 //------------------------------------------------------------------
290 /// Get the command that appropriate for a "repeat" of the current command.
292 /// @param[in] current_command_line
293 /// The complete current command line.
296 /// nullptr if there is no special repeat command - it will use the
297 /// current command line.
298 /// Otherwise a pointer to the command to be repeated.
299 /// If the returned string is the empty string, the command won't be
301 //------------------------------------------------------------------
302 virtual const char *GetRepeatCommand(Args ¤t_command_args,
307 bool HasOverrideCallback() const {
308 return m_command_override_callback ||
309 m_deprecated_command_override_callback;
312 void SetOverrideCallback(lldb::CommandOverrideCallback callback,
314 m_deprecated_command_override_callback = callback;
315 m_command_override_baton = baton;
318 void SetOverrideCallback(lldb::CommandOverrideCallbackWithResult callback,
320 m_command_override_callback = callback;
321 m_command_override_baton = baton;
324 bool InvokeOverrideCallback(const char **argv, CommandReturnObject &result) {
325 if (m_command_override_callback)
326 return m_command_override_callback(m_command_override_baton, argv,
328 else if (m_deprecated_command_override_callback)
329 return m_deprecated_command_override_callback(m_command_override_baton,
335 virtual bool Execute(const char *args_string,
336 CommandReturnObject &result) = 0;
339 bool ParseOptionsAndNotify(Args &args, CommandReturnObject &result,
340 OptionGroupOptions &group_options,
341 ExecutionContext &exe_ctx);
343 virtual const char *GetInvalidTargetDescription() {
344 return "invalid target, create a target using the 'target create' command";
347 virtual const char *GetInvalidProcessDescription() {
348 return "invalid process";
351 virtual const char *GetInvalidThreadDescription() { return "invalid thread"; }
353 virtual const char *GetInvalidFrameDescription() { return "invalid frame"; }
355 virtual const char *GetInvalidRegContextDescription() {
356 return "invalid frame, no registers";
359 // This is for use in the command interpreter, when you either want the
360 // selected target, or if no target is present you want to prime the dummy
361 // target with entities that will be copied over to new targets.
362 Target *GetSelectedOrDummyTarget(bool prefer_dummy = false);
363 Target *GetDummyTarget();
365 // If a command needs to use the "current" thread, use this call. Command
366 // objects will have an ExecutionContext to use, and that may or may not have
367 // a thread in it. If it does, you should use that by default, if not, then
368 // use the ExecutionContext's target's selected thread, etc... This call
369 // insulates you from the details of this calculation.
370 Thread *GetDefaultThread();
372 //------------------------------------------------------------------
373 /// Check the command to make sure anything required by this
374 /// command is available.
376 /// @param[out] result
377 /// A command result object, if it is not okay to run the command
378 /// this will be filled in with a suitable error.
381 /// \b true if it is okay to run this command, \b false otherwise.
382 //------------------------------------------------------------------
383 bool CheckRequirements(CommandReturnObject &result);
387 CommandInterpreter &m_interpreter;
388 ExecutionContext m_exe_ctx;
389 std::unique_lock<std::recursive_mutex> m_api_locker;
390 std::string m_cmd_name;
391 std::string m_cmd_help_short;
392 std::string m_cmd_help_long;
393 std::string m_cmd_syntax;
395 std::vector<CommandArgumentEntry> m_arguments;
396 lldb::CommandOverrideCallback m_deprecated_command_override_callback;
397 lldb::CommandOverrideCallbackWithResult m_command_override_callback;
398 void *m_command_override_baton;
400 // Helper function to populate IDs or ID ranges as the command argument data
401 // to the specified command argument entry.
402 static void AddIDsArgumentData(CommandArgumentEntry &arg,
403 lldb::CommandArgumentType ID,
404 lldb::CommandArgumentType IDRange);
407 class CommandObjectParsed : public CommandObject {
409 CommandObjectParsed(CommandInterpreter &interpreter, const char *name,
410 const char *help = nullptr, const char *syntax = nullptr,
412 : CommandObject(interpreter, name, help, syntax, flags) {}
414 ~CommandObjectParsed() override = default;
416 bool Execute(const char *args_string, CommandReturnObject &result) override;
419 virtual bool DoExecute(Args &command, CommandReturnObject &result) = 0;
421 bool WantsRawCommandString() override { return false; }
424 class CommandObjectRaw : public CommandObject {
426 CommandObjectRaw(CommandInterpreter &interpreter, llvm::StringRef name,
427 llvm::StringRef help = "", llvm::StringRef syntax = "",
429 : CommandObject(interpreter, name, help, syntax, flags) {}
431 ~CommandObjectRaw() override = default;
433 bool Execute(const char *args_string, CommandReturnObject &result) override;
436 virtual bool DoExecute(llvm::StringRef command,
437 CommandReturnObject &result) = 0;
439 bool WantsRawCommandString() override { return true; }
442 } // namespace lldb_private
444 #endif // liblldb_CommandObject_h_