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_
17 #include "lldb/Utility/Flags.h"
19 #include "lldb/Interpreter/CommandCompletions.h"
20 #include "lldb/Interpreter/Options.h"
21 #include "lldb/Target/ExecutionContext.h"
22 #include "lldb/Utility/Args.h"
23 #include "lldb/Utility/CompletionRequest.h"
24 #include "lldb/Utility/StringList.h"
25 #include "lldb/lldb-private.h"
27 namespace lldb_private {
29 // This function really deals with CommandObjectLists, but we didn't make a
30 // CommandObjectList class, so I'm sticking it here. But we really should have
31 // such a class. Anyway, it looks up the commands in the map that match the
32 // partial string cmd_str, inserts the matches into matches, and returns the
35 template <typename ValueType>
36 int AddNamesMatchingPartialString(
37 const std::map<std::string, ValueType> &in_map, llvm::StringRef cmd_str,
38 StringList &matches, StringList *descriptions = nullptr) {
41 const bool add_all = cmd_str.empty();
43 for (auto iter = in_map.begin(), end = in_map.end(); iter != end; iter++) {
44 if (add_all || (iter->first.find(cmd_str, 0) == 0)) {
46 matches.AppendString(iter->first.c_str());
48 descriptions->AppendString(iter->second->GetHelp());
55 template <typename ValueType>
56 size_t FindLongestCommandWord(std::map<std::string, ValueType> &dict) {
57 auto end = dict.end();
60 for (auto pos = dict.begin(); pos != end; ++pos) {
61 size_t len = pos->first.size();
70 typedef llvm::StringRef(ArgumentHelpCallbackFunction)();
72 struct ArgumentHelpCallback {
73 ArgumentHelpCallbackFunction *help_callback;
76 llvm::StringRef operator()() const { return (*help_callback)(); }
78 explicit operator bool() const { return (help_callback != nullptr); }
81 struct ArgumentTableEntry // Entries in the main argument information table
83 lldb::CommandArgumentType arg_type;
85 CommandCompletions::CommonCompletionTypes completion_type;
86 ArgumentHelpCallback help_function;
87 const char *help_text;
90 struct CommandArgumentData // Used to build individual command argument lists
92 lldb::CommandArgumentType arg_type;
93 ArgumentRepetitionType arg_repetition;
94 uint32_t arg_opt_set_association; // This arg might be associated only with
95 // some particular option set(s).
97 : arg_type(lldb::eArgTypeNone), arg_repetition(eArgRepeatPlain),
98 arg_opt_set_association(LLDB_OPT_SET_ALL) // By default, the arg
99 // associates to all option
104 typedef std::vector<CommandArgumentData>
105 CommandArgumentEntry; // Used to build individual command argument lists
107 static ArgumentTableEntry g_arguments_data
108 [lldb::eArgTypeLastArg]; // Main argument information table
110 typedef std::map<std::string, lldb::CommandObjectSP> CommandMap;
112 CommandObject(CommandInterpreter &interpreter, llvm::StringRef name,
113 llvm::StringRef help = "", llvm::StringRef syntax = "",
116 virtual ~CommandObject();
119 GetArgumentTypeAsCString(const lldb::CommandArgumentType arg_type);
122 GetArgumentDescriptionAsCString(const lldb::CommandArgumentType arg_type);
124 CommandInterpreter &GetCommandInterpreter() { return m_interpreter; }
126 virtual llvm::StringRef GetHelp();
128 virtual llvm::StringRef GetHelpLong();
130 virtual llvm::StringRef GetSyntax();
132 llvm::StringRef GetCommandName() const;
134 virtual void SetHelp(llvm::StringRef str);
136 virtual void SetHelpLong(llvm::StringRef str);
138 void SetSyntax(llvm::StringRef str);
140 // override this to return true if you want to enable the user to delete the
141 // Command object from the Command dictionary (aliases have their own
142 // deletion scheme, so they do not need to care about this)
143 virtual bool IsRemovable() const { return false; }
145 virtual bool IsMultiwordObject() { return false; }
147 virtual CommandObjectMultiword *GetAsMultiwordCommand() { return nullptr; }
149 virtual bool IsAlias() { return false; }
151 // override this to return true if your command is somehow a "dash-dash" form
152 // of some other command (e.g. po is expr -O --); this is a powerful hint to
153 // the help system that one cannot pass options to this command
154 virtual bool IsDashDashCommand() { return false; }
156 virtual lldb::CommandObjectSP GetSubcommandSP(llvm::StringRef sub_cmd,
157 StringList *matches = nullptr) {
158 return lldb::CommandObjectSP();
161 virtual CommandObject *GetSubcommandObject(llvm::StringRef sub_cmd,
162 StringList *matches = nullptr) {
166 virtual void AproposAllSubCommands(llvm::StringRef prefix,
167 llvm::StringRef search_word,
168 StringList &commands_found,
169 StringList &commands_help) {}
171 void FormatLongHelpText(Stream &output_strm, llvm::StringRef long_help);
173 void GenerateHelpText(CommandReturnObject &result);
175 virtual void GenerateHelpText(Stream &result);
177 // this is needed in order to allow the SBCommand class to transparently try
178 // and load subcommands - it will fail on anything but a multiword command,
179 // but it avoids us doing type checkings and casts
180 virtual bool LoadSubCommand(llvm::StringRef cmd_name,
181 const lldb::CommandObjectSP &command_obj) {
185 virtual bool WantsRawCommandString() = 0;
187 // By default, WantsCompletion = !WantsRawCommandString. Subclasses who want
188 // raw command string but desire, for example, argument completion should
189 // override this method to return true.
190 virtual bool WantsCompletion() { return !WantsRawCommandString(); }
192 virtual Options *GetOptions();
194 static const ArgumentTableEntry *GetArgumentTable();
196 static lldb::CommandArgumentType LookupArgumentName(llvm::StringRef arg_name);
198 static const ArgumentTableEntry *
199 FindArgumentDataByType(lldb::CommandArgumentType arg_type);
201 int GetNumArgumentEntries();
203 CommandArgumentEntry *GetArgumentEntryAtIndex(int idx);
205 static void GetArgumentHelp(Stream &str, lldb::CommandArgumentType arg_type,
206 CommandInterpreter &interpreter);
208 static const char *GetArgumentName(lldb::CommandArgumentType arg_type);
210 // Generates a nicely formatted command args string for help command output.
211 // By default, all possible args are taken into account, for example, '<expr
212 // | variable-name>'. This can be refined by passing a second arg specifying
213 // which option set(s) we are interested, which could then, for example,
214 // produce either '<expr>' or '<variable-name>'.
215 void GetFormattedCommandArguments(Stream &str,
216 uint32_t opt_set_mask = LLDB_OPT_SET_ALL);
218 bool IsPairType(ArgumentRepetitionType arg_repeat_type);
220 bool ParseOptions(Args &args, CommandReturnObject &result);
222 void SetCommandName(llvm::StringRef name);
224 //------------------------------------------------------------------
225 /// This default version handles calling option argument completions and then
226 /// calls HandleArgumentCompletion if the cursor is on an argument, not an
227 /// option. Don't override this method, override HandleArgumentCompletion
228 /// instead unless you have special reasons.
230 /// @param[in/out] request
231 /// The completion request that needs to be answered.
233 /// FIXME: This is the wrong return value, since we also need to make a
234 /// distinction between
235 /// total number of matches, and the window the user wants returned.
238 /// \btrue if we were in an option, \bfalse otherwise.
239 //------------------------------------------------------------------
240 virtual int HandleCompletion(CompletionRequest &request);
242 //------------------------------------------------------------------
243 /// The input array contains a parsed version of the line. The insertion
244 /// point is given by cursor_index (the index in input of the word containing
245 /// the cursor) and cursor_char_position (the position of the cursor in that
247 /// We've constructed the map of options and their arguments as well if that
248 /// is helpful for the completion.
250 /// @param[in/out] request
251 /// The completion request that needs to be answered.
253 /// FIXME: This is the wrong return value, since we also need to make a
254 /// distinction between
255 /// total number of matches, and the window the user wants returned.
258 /// The number of completions.
259 //------------------------------------------------------------------
261 HandleArgumentCompletion(CompletionRequest &request,
262 OptionElementVector &opt_element_vector) {
266 bool HelpTextContainsWord(llvm::StringRef search_word,
267 bool search_short_help = true,
268 bool search_long_help = true,
269 bool search_syntax = true,
270 bool search_options = true);
272 //------------------------------------------------------------------
273 /// The flags accessor.
276 /// A reference to the Flags member variable.
277 //------------------------------------------------------------------
278 Flags &GetFlags() { return m_flags; }
280 //------------------------------------------------------------------
281 /// The flags const accessor.
284 /// A const reference to the Flags member variable.
285 //------------------------------------------------------------------
286 const Flags &GetFlags() const { return m_flags; }
288 //------------------------------------------------------------------
289 /// Get the command that appropriate for a "repeat" of the current command.
291 /// @param[in] current_command_line
292 /// The complete current command line.
295 /// nullptr if there is no special repeat command - it will use the
296 /// current command line.
297 /// Otherwise a pointer to the command to be repeated.
298 /// If the returned string is the empty string, the command won't be
300 //------------------------------------------------------------------
301 virtual const char *GetRepeatCommand(Args ¤t_command_args,
306 bool HasOverrideCallback() const {
307 return m_command_override_callback ||
308 m_deprecated_command_override_callback;
311 void SetOverrideCallback(lldb::CommandOverrideCallback callback,
313 m_deprecated_command_override_callback = callback;
314 m_command_override_baton = baton;
317 void SetOverrideCallback(lldb::CommandOverrideCallbackWithResult callback,
319 m_command_override_callback = callback;
320 m_command_override_baton = baton;
323 bool InvokeOverrideCallback(const char **argv, CommandReturnObject &result) {
324 if (m_command_override_callback)
325 return m_command_override_callback(m_command_override_baton, argv,
327 else if (m_deprecated_command_override_callback)
328 return m_deprecated_command_override_callback(m_command_override_baton,
334 virtual bool Execute(const char *args_string,
335 CommandReturnObject &result) = 0;
338 bool ParseOptionsAndNotify(Args &args, CommandReturnObject &result,
339 OptionGroupOptions &group_options,
340 ExecutionContext &exe_ctx);
342 virtual const char *GetInvalidTargetDescription() {
343 return "invalid target, create a target using the 'target create' command";
346 virtual const char *GetInvalidProcessDescription() {
347 return "invalid process";
350 virtual const char *GetInvalidThreadDescription() { return "invalid thread"; }
352 virtual const char *GetInvalidFrameDescription() { return "invalid frame"; }
354 virtual const char *GetInvalidRegContextDescription() {
355 return "invalid frame, no registers";
358 // This is for use in the command interpreter, when you either want the
359 // selected target, or if no target is present you want to prime the dummy
360 // target with entities that will be copied over to new targets.
361 Target *GetSelectedOrDummyTarget(bool prefer_dummy = false);
362 Target *GetDummyTarget();
364 // If a command needs to use the "current" thread, use this call. Command
365 // objects will have an ExecutionContext to use, and that may or may not have
366 // a thread in it. If it does, you should use that by default, if not, then
367 // use the ExecutionContext's target's selected thread, etc... This call
368 // insulates you from the details of this calculation.
369 Thread *GetDefaultThread();
371 //------------------------------------------------------------------
372 /// Check the command to make sure anything required by this
373 /// command is available.
375 /// @param[out] result
376 /// A command result object, if it is not okay to run the command
377 /// this will be filled in with a suitable error.
380 /// \b true if it is okay to run this command, \b false otherwise.
381 //------------------------------------------------------------------
382 bool CheckRequirements(CommandReturnObject &result);
386 CommandInterpreter &m_interpreter;
387 ExecutionContext m_exe_ctx;
388 std::unique_lock<std::recursive_mutex> m_api_locker;
389 std::string m_cmd_name;
390 std::string m_cmd_help_short;
391 std::string m_cmd_help_long;
392 std::string m_cmd_syntax;
394 std::vector<CommandArgumentEntry> m_arguments;
395 lldb::CommandOverrideCallback m_deprecated_command_override_callback;
396 lldb::CommandOverrideCallbackWithResult m_command_override_callback;
397 void *m_command_override_baton;
399 // Helper function to populate IDs or ID ranges as the command argument data
400 // to the specified command argument entry.
401 static void AddIDsArgumentData(CommandArgumentEntry &arg,
402 lldb::CommandArgumentType ID,
403 lldb::CommandArgumentType IDRange);
406 class CommandObjectParsed : public CommandObject {
408 CommandObjectParsed(CommandInterpreter &interpreter, const char *name,
409 const char *help = nullptr, const char *syntax = nullptr,
411 : CommandObject(interpreter, name, help, syntax, flags) {}
413 ~CommandObjectParsed() override = default;
415 bool Execute(const char *args_string, CommandReturnObject &result) override;
418 virtual bool DoExecute(Args &command, CommandReturnObject &result) = 0;
420 bool WantsRawCommandString() override { return false; }
423 class CommandObjectRaw : public CommandObject {
425 CommandObjectRaw(CommandInterpreter &interpreter, llvm::StringRef name,
426 llvm::StringRef help = "", llvm::StringRef syntax = "",
428 : CommandObject(interpreter, name, help, syntax, flags) {}
430 ~CommandObjectRaw() override = default;
432 bool Execute(const char *args_string, CommandReturnObject &result) override;
435 virtual bool DoExecute(llvm::StringRef command,
436 CommandReturnObject &result) = 0;
438 bool WantsRawCommandString() override { return true; }
441 } // namespace lldb_private
443 #endif // liblldb_CommandObject_h_