1 //===-- CommandObject.cpp ---------------------------------------*- 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 #include "lldb/Interpreter/CommandObject.h"
19 #include "lldb/Core/Address.h"
20 #include "lldb/Core/ArchSpec.h"
21 #include "lldb/Interpreter/Options.h"
23 // These are for the Sourcename completers.
24 // FIXME: Make a separate file for the completers.
25 #include "lldb/Host/FileSpec.h"
26 #include "lldb/Core/FileSpecList.h"
27 #include "lldb/DataFormatters/FormatManager.h"
28 #include "lldb/Target/Process.h"
29 #include "lldb/Target/Target.h"
31 #include "lldb/Target/Language.h"
33 #include "lldb/Interpreter/CommandInterpreter.h"
34 #include "lldb/Interpreter/CommandReturnObject.h"
37 using namespace lldb_private;
39 //-------------------------------------------------------------------------
41 //-------------------------------------------------------------------------
43 CommandObject::CommandObject
45 CommandInterpreter &interpreter,
51 m_interpreter (interpreter),
52 m_cmd_name (name ? name : ""),
58 m_deprecated_command_override_callback (nullptr),
59 m_command_override_callback (nullptr),
60 m_command_override_baton (nullptr)
63 m_cmd_help_short = help;
64 if (syntax && syntax[0])
65 m_cmd_syntax = syntax;
68 CommandObject::~CommandObject ()
73 CommandObject::GetHelp ()
75 return m_cmd_help_short.c_str();
79 CommandObject::GetHelpLong ()
81 return m_cmd_help_long.c_str();
85 CommandObject::GetSyntax ()
87 if (m_cmd_syntax.length() == 0)
89 StreamString syntax_str;
90 syntax_str.Printf ("%s", GetCommandName());
91 if (!IsDashDashCommand() && GetOptions() != nullptr)
92 syntax_str.Printf (" <cmd-options>");
93 if (m_arguments.size() > 0)
95 syntax_str.Printf (" ");
96 if (!IsDashDashCommand() && WantsRawCommandString() && GetOptions() && GetOptions()->NumCommandOptions())
97 syntax_str.Printf("-- ");
98 GetFormattedCommandArguments (syntax_str);
100 m_cmd_syntax = syntax_str.GetData ();
103 return m_cmd_syntax.c_str();
107 CommandObject::GetCommandName ()
109 return m_cmd_name.c_str();
113 CommandObject::SetCommandName (const char *name)
119 CommandObject::SetHelp (const char *cstr)
122 m_cmd_help_short = cstr;
124 m_cmd_help_short.assign("");
128 CommandObject::SetHelpLong (const char *cstr)
131 m_cmd_help_long = cstr;
133 m_cmd_help_long.assign("");
137 CommandObject::SetSyntax (const char *cstr)
143 CommandObject::GetOptions ()
145 // By default commands don't have options unless this virtual function
146 // is overridden by base classes.
151 CommandObject::ParseOptions
154 CommandReturnObject &result
157 // See if the subclass has options?
158 Options *options = GetOptions();
159 if (options != nullptr)
162 options->NotifyOptionParsingStarting();
164 // ParseOptions calls getopt_long_only, which always skips the zero'th item in the array and starts at position 1,
165 // so we need to push a dummy value into position zero.
166 args.Unshift("dummy_string");
167 error = args.ParseOptions (*options);
169 // The "dummy_string" will have already been removed by ParseOptions,
170 // so no need to remove it.
173 error = options->NotifyOptionParsingFinished();
177 if (options->VerifyOptions (result))
182 const char *error_cstr = error.AsCString();
185 // We got an error string, lets use that
186 result.AppendError(error_cstr);
190 // No error string, output the usage information into result
191 options->GenerateOptionUsage (result.GetErrorStream(), this);
194 result.SetStatus (eReturnStatusFailed);
203 CommandObject::CheckRequirements (CommandReturnObject &result)
205 #ifdef LLDB_CONFIGURATION_DEBUG
206 // Nothing should be stored in m_exe_ctx between running commands as m_exe_ctx
207 // has shared pointers to the target, process, thread and frame and we don't
208 // want any CommandObject instances to keep any of these objects around
209 // longer than for a single command. Every command should call
210 // CommandObject::Cleanup() after it has completed
211 assert (m_exe_ctx.GetTargetPtr() == NULL);
212 assert (m_exe_ctx.GetProcessPtr() == NULL);
213 assert (m_exe_ctx.GetThreadPtr() == NULL);
214 assert (m_exe_ctx.GetFramePtr() == NULL);
217 // Lock down the interpreter's execution context prior to running the
218 // command so we guarantee the selected target, process, thread and frame
219 // can't go away during the execution
220 m_exe_ctx = m_interpreter.GetExecutionContext();
222 const uint32_t flags = GetFlags().Get();
223 if (flags & (eCommandRequiresTarget |
224 eCommandRequiresProcess |
225 eCommandRequiresThread |
226 eCommandRequiresFrame |
227 eCommandTryTargetAPILock ))
230 if ((flags & eCommandRequiresTarget) && !m_exe_ctx.HasTargetScope())
232 result.AppendError (GetInvalidTargetDescription());
236 if ((flags & eCommandRequiresProcess) && !m_exe_ctx.HasProcessScope())
238 if (!m_exe_ctx.HasTargetScope())
239 result.AppendError (GetInvalidTargetDescription());
241 result.AppendError (GetInvalidProcessDescription());
245 if ((flags & eCommandRequiresThread) && !m_exe_ctx.HasThreadScope())
247 if (!m_exe_ctx.HasTargetScope())
248 result.AppendError (GetInvalidTargetDescription());
249 else if (!m_exe_ctx.HasProcessScope())
250 result.AppendError (GetInvalidProcessDescription());
252 result.AppendError (GetInvalidThreadDescription());
256 if ((flags & eCommandRequiresFrame) && !m_exe_ctx.HasFrameScope())
258 if (!m_exe_ctx.HasTargetScope())
259 result.AppendError (GetInvalidTargetDescription());
260 else if (!m_exe_ctx.HasProcessScope())
261 result.AppendError (GetInvalidProcessDescription());
262 else if (!m_exe_ctx.HasThreadScope())
263 result.AppendError (GetInvalidThreadDescription());
265 result.AppendError (GetInvalidFrameDescription());
269 if ((flags & eCommandRequiresRegContext) && (m_exe_ctx.GetRegisterContext() == nullptr))
271 result.AppendError (GetInvalidRegContextDescription());
275 if (flags & eCommandTryTargetAPILock)
277 Target *target = m_exe_ctx.GetTargetPtr();
279 m_api_locker = std::unique_lock<std::recursive_mutex>(target->GetAPIMutex());
283 if (GetFlags().AnySet (eCommandProcessMustBeLaunched | eCommandProcessMustBePaused))
285 Process *process = m_interpreter.GetExecutionContext().GetProcessPtr();
286 if (process == nullptr)
288 // A process that is not running is considered paused.
289 if (GetFlags().Test(eCommandProcessMustBeLaunched))
291 result.AppendError ("Process must exist.");
292 result.SetStatus (eReturnStatusFailed);
298 StateType state = process->GetState();
302 case eStateSuspended:
307 case eStateConnected:
308 case eStateAttaching:
309 case eStateLaunching:
313 if (GetFlags().Test(eCommandProcessMustBeLaunched))
315 result.AppendError ("Process must be launched.");
316 result.SetStatus (eReturnStatusFailed);
323 if (GetFlags().Test(eCommandProcessMustBePaused))
325 result.AppendError ("Process is running. Use 'process interrupt' to pause execution.");
326 result.SetStatus (eReturnStatusFailed);
336 CommandObject::Cleanup ()
339 if (m_api_locker.owns_lock())
340 m_api_locker.unlock();
344 CommandObject::HandleCompletion
348 int &cursor_char_position,
349 int match_start_point,
350 int max_return_elements,
355 // Default implementation of WantsCompletion() is !WantsRawCommandString().
356 // Subclasses who want raw command string but desire, for example,
357 // argument completion should override WantsCompletion() to return true,
359 if (WantsRawCommandString() && !WantsCompletion())
361 // FIXME: Abstract telling the completion to insert the completion character.
367 // Can we do anything generic with the options?
368 Options *cur_options = GetOptions();
369 CommandReturnObject result;
370 OptionElementVector opt_element_vector;
372 if (cur_options != nullptr)
374 // Re-insert the dummy command name string which will have been
376 input.Unshift ("dummy-string");
380 // I stick an element on the end of the input, because if the last element is
381 // option that requires an argument, getopt_long_only will freak out.
383 input.AppendArgument ("<FAKE-VALUE>");
385 input.ParseArgsForCompletion (*cur_options, opt_element_vector, cursor_index);
387 input.DeleteArgumentAtIndex(input.GetArgumentCount() - 1);
389 bool handled_by_options;
390 handled_by_options = cur_options->HandleOptionCompletion (input,
393 cursor_char_position,
398 if (handled_by_options)
399 return matches.GetSize();
402 // If we got here, the last word is not an option or an option argument.
403 return HandleArgumentCompletion (input,
405 cursor_char_position,
415 CommandObject::HelpTextContainsWord (const char *search_word,
416 bool search_short_help,
417 bool search_long_help,
421 std::string options_usage_help;
423 bool found_word = false;
425 const char *short_help = GetHelp();
426 const char *long_help = GetHelpLong();
427 const char *syntax_help = GetSyntax();
429 if (search_short_help && short_help && strcasestr (short_help, search_word))
431 else if (search_long_help && long_help && strcasestr (long_help, search_word))
433 else if (search_syntax && syntax_help && strcasestr (syntax_help, search_word))
438 && GetOptions() != nullptr)
440 StreamString usage_help;
441 GetOptions()->GenerateOptionUsage (usage_help, this);
442 if (usage_help.GetSize() > 0)
444 const char *usage_text = usage_help.GetData();
445 if (strcasestr (usage_text, search_word))
454 CommandObject::GetNumArgumentEntries ()
456 return m_arguments.size();
459 CommandObject::CommandArgumentEntry *
460 CommandObject::GetArgumentEntryAtIndex (int idx)
462 if (static_cast<size_t>(idx) < m_arguments.size())
463 return &(m_arguments[idx]);
468 const CommandObject::ArgumentTableEntry *
469 CommandObject::FindArgumentDataByType (CommandArgumentType arg_type)
471 const ArgumentTableEntry *table = CommandObject::GetArgumentTable();
473 for (int i = 0; i < eArgTypeLastArg; ++i)
474 if (table[i].arg_type == arg_type)
481 CommandObject::GetArgumentHelp (Stream &str, CommandArgumentType arg_type, CommandInterpreter &interpreter)
483 const ArgumentTableEntry* table = CommandObject::GetArgumentTable();
484 const ArgumentTableEntry *entry = &(table[arg_type]);
486 // The table is *supposed* to be kept in arg_type order, but someone *could* have messed it up...
488 if (entry->arg_type != arg_type)
489 entry = CommandObject::FindArgumentDataByType (arg_type);
494 StreamString name_str;
495 name_str.Printf ("<%s>", entry->arg_name);
497 if (entry->help_function)
499 const char* help_text = entry->help_function();
500 if (!entry->help_function.self_formatting)
502 interpreter.OutputFormattedHelpText (str, name_str.GetData(), "--", help_text,
507 interpreter.OutputHelpText(str, name_str.GetData(), "--", help_text,
512 interpreter.OutputFormattedHelpText (str, name_str.GetData(), "--", entry->help_text, name_str.GetSize());
516 CommandObject::GetArgumentName (CommandArgumentType arg_type)
518 const ArgumentTableEntry *entry = &(CommandObject::GetArgumentTable()[arg_type]);
520 // The table is *supposed* to be kept in arg_type order, but someone *could* have messed it up...
522 if (entry->arg_type != arg_type)
523 entry = CommandObject::FindArgumentDataByType (arg_type);
526 return entry->arg_name;
529 str << "Arg name for type (" << arg_type << ") not in arg table!";
530 return str.GetData();
534 CommandObject::IsPairType (ArgumentRepetitionType arg_repeat_type)
536 if ((arg_repeat_type == eArgRepeatPairPlain)
537 || (arg_repeat_type == eArgRepeatPairOptional)
538 || (arg_repeat_type == eArgRepeatPairPlus)
539 || (arg_repeat_type == eArgRepeatPairStar)
540 || (arg_repeat_type == eArgRepeatPairRange)
541 || (arg_repeat_type == eArgRepeatPairRangeOptional))
547 static CommandObject::CommandArgumentEntry
548 OptSetFiltered(uint32_t opt_set_mask, CommandObject::CommandArgumentEntry &cmd_arg_entry)
550 CommandObject::CommandArgumentEntry ret_val;
551 for (unsigned i = 0; i < cmd_arg_entry.size(); ++i)
552 if (opt_set_mask & cmd_arg_entry[i].arg_opt_set_association)
553 ret_val.push_back(cmd_arg_entry[i]);
557 // Default parameter value of opt_set_mask is LLDB_OPT_SET_ALL, which means take
558 // all the argument data into account. On rare cases where some argument sticks
559 // with certain option sets, this function returns the option set filtered args.
561 CommandObject::GetFormattedCommandArguments (Stream &str, uint32_t opt_set_mask)
563 int num_args = m_arguments.size();
564 for (int i = 0; i < num_args; ++i)
568 CommandArgumentEntry arg_entry =
569 opt_set_mask == LLDB_OPT_SET_ALL ? m_arguments[i]
570 : OptSetFiltered(opt_set_mask, m_arguments[i]);
571 int num_alternatives = arg_entry.size();
573 if ((num_alternatives == 2)
574 && IsPairType (arg_entry[0].arg_repetition))
576 const char *first_name = GetArgumentName (arg_entry[0].arg_type);
577 const char *second_name = GetArgumentName (arg_entry[1].arg_type);
578 switch (arg_entry[0].arg_repetition)
580 case eArgRepeatPairPlain:
581 str.Printf ("<%s> <%s>", first_name, second_name);
583 case eArgRepeatPairOptional:
584 str.Printf ("[<%s> <%s>]", first_name, second_name);
586 case eArgRepeatPairPlus:
587 str.Printf ("<%s> <%s> [<%s> <%s> [...]]", first_name, second_name, first_name, second_name);
589 case eArgRepeatPairStar:
590 str.Printf ("[<%s> <%s> [<%s> <%s> [...]]]", first_name, second_name, first_name, second_name);
592 case eArgRepeatPairRange:
593 str.Printf ("<%s_1> <%s_1> ... <%s_n> <%s_n>", first_name, second_name, first_name, second_name);
595 case eArgRepeatPairRangeOptional:
596 str.Printf ("[<%s_1> <%s_1> ... <%s_n> <%s_n>]", first_name, second_name, first_name, second_name);
598 // Explicitly test for all the rest of the cases, so if new types get added we will notice the
599 // missing case statement(s).
600 case eArgRepeatPlain:
601 case eArgRepeatOptional:
604 case eArgRepeatRange:
605 // These should not be reached, as they should fail the IsPairType test above.
612 for (int j = 0; j < num_alternatives; ++j)
615 names.Printf (" | ");
616 names.Printf ("%s", GetArgumentName (arg_entry[j].arg_type));
618 switch (arg_entry[0].arg_repetition)
620 case eArgRepeatPlain:
621 str.Printf ("<%s>", names.GetData());
624 str.Printf ("<%s> [<%s> [...]]", names.GetData(), names.GetData());
627 str.Printf ("[<%s> [<%s> [...]]]", names.GetData(), names.GetData());
629 case eArgRepeatOptional:
630 str.Printf ("[<%s>]", names.GetData());
632 case eArgRepeatRange:
633 str.Printf ("<%s_1> .. <%s_n>", names.GetData(), names.GetData());
635 // Explicitly test for all the rest of the cases, so if new types get added we will notice the
636 // missing case statement(s).
637 case eArgRepeatPairPlain:
638 case eArgRepeatPairOptional:
639 case eArgRepeatPairPlus:
640 case eArgRepeatPairStar:
641 case eArgRepeatPairRange:
642 case eArgRepeatPairRangeOptional:
643 // These should not be hit, as they should pass the IsPairType test above, and control should
644 // have gone into the other branch of the if statement.
652 CommandObject::LookupArgumentName (const char *arg_name)
654 CommandArgumentType return_type = eArgTypeLastArg;
656 std::string arg_name_str (arg_name);
657 size_t len = arg_name_str.length();
658 if (arg_name[0] == '<'
659 && arg_name[len-1] == '>')
660 arg_name_str = arg_name_str.substr (1, len-2);
662 const ArgumentTableEntry *table = GetArgumentTable();
663 for (int i = 0; i < eArgTypeLastArg; ++i)
664 if (arg_name_str.compare (table[i].arg_name) == 0)
665 return_type = g_arguments_data[i].arg_type;
671 RegisterNameHelpTextCallback ()
673 return "Register names can be specified using the architecture specific names. "
674 "They can also be specified using generic names. Not all generic entities have "
675 "registers backing them on all architectures. When they don't the generic name "
676 "will return an error.\n"
677 "The generic names defined in lldb are:\n"
679 "pc - program counter register\n"
680 "ra - return address register\n"
681 "fp - frame pointer register\n"
682 "sp - stack pointer register\n"
683 "flags - the flags register\n"
684 "arg{1-6} - integer argument passing registers.\n";
688 BreakpointIDHelpTextCallback ()
690 return "Breakpoints are identified using major and minor numbers; the major "
691 "number corresponds to the single entity that was created with a 'breakpoint "
692 "set' command; the minor numbers correspond to all the locations that were "
693 "actually found/set based on the major breakpoint. A full breakpoint ID might "
694 "look like 3.14, meaning the 14th location set for the 3rd breakpoint. You "
695 "can specify all the locations of a breakpoint by just indicating the major "
696 "breakpoint number. A valid breakpoint ID consists either of just the major "
697 "number, or the major number followed by a dot and the location number (e.g. "
698 "3 or 3.2 could both be valid breakpoint IDs.)";
702 BreakpointIDRangeHelpTextCallback ()
704 return "A 'breakpoint ID list' is a manner of specifying multiple breakpoints. "
705 "This can be done through several mechanisms. The easiest way is to just "
706 "enter a space-separated list of breakpoint IDs. To specify all the "
707 "breakpoint locations under a major breakpoint, you can use the major "
708 "breakpoint number followed by '.*', eg. '5.*' means all the locations under "
709 "breakpoint 5. You can also indicate a range of breakpoints by using "
710 "<start-bp-id> - <end-bp-id>. The start-bp-id and end-bp-id for a range can "
711 "be any valid breakpoint IDs. It is not legal, however, to specify a range "
712 "using specific locations that cross major breakpoint numbers. I.e. 3.2 - 3.7"
713 " is legal; 2 - 5 is legal; but 3.2 - 4.4 is not legal.";
717 BreakpointNameHelpTextCallback ()
719 return "A name that can be added to a breakpoint when it is created, or later "
720 "on with the \"breakpoint name add\" command. "
721 "Breakpoint names can be used to specify breakpoints in all the places breakpoint IDs "
722 "and breakpoint ID ranges can be used. As such they provide a convenient way to group breakpoints, "
723 "and to operate on breakpoints you create without having to track the breakpoint number. "
724 "Note, the attributes you set when using a breakpoint name in a breakpoint command don't "
725 "adhere to the name, but instead are set individually on all the breakpoints currently tagged with that "
726 "name. Future breakpoints "
727 "tagged with that name will not pick up the attributes previously given using that name. "
728 "In order to distinguish breakpoint names from breakpoint IDs and ranges, "
729 "names must start with a letter from a-z or A-Z and cannot contain spaces, \".\" or \"-\". "
730 "Also, breakpoint names can only be applied to breakpoints, not to breakpoint locations.";
734 GDBFormatHelpTextCallback ()
736 return "A GDB format consists of a repeat count, a format letter and a size letter. "
737 "The repeat count is optional and defaults to 1. The format letter is optional "
738 "and defaults to the previous format that was used. The size letter is optional "
739 "and defaults to the previous size that was used.\n"
741 "Format letters include:\n"
745 "u - unsigned decimal\n"
755 "Size letters include:\n"
756 "b - 1 byte (byte)\n"
757 "h - 2 bytes (halfword)\n"
758 "w - 4 bytes (word)\n"
759 "g - 8 bytes (giant)\n"
762 "32xb - show 32 1 byte hexadecimal integer values\n"
763 "16xh - show 16 2 byte hexadecimal integer values\n"
764 "64 - show 64 2 byte hexadecimal integer values (format and size from the last format)\n"
765 "dw - show 1 4 byte decimal integer value\n"
770 FormatHelpTextCallback ()
773 static char* help_text_ptr = nullptr;
776 return help_text_ptr;
779 sstr << "One of the format names (or one-character names) that can be used to show a variable's value:\n";
780 for (Format f = eFormatDefault; f < kNumFormats; f = Format(f+1))
782 if (f != eFormatDefault)
785 char format_char = FormatManager::GetFormatAsFormatChar(f);
787 sstr.Printf("'%c' or ", format_char);
789 sstr.Printf ("\"%s\"", FormatManager::GetFormatAsCString(f));
794 std::string data = sstr.GetString();
796 help_text_ptr = new char[data.length()+1];
798 data.copy(help_text_ptr, data.length());
800 return help_text_ptr;
804 LanguageTypeHelpTextCallback ()
806 static char* help_text_ptr = nullptr;
809 return help_text_ptr;
812 sstr << "One of the following languages:\n";
814 Language::PrintAllLanguages(sstr, " ", "\n");
818 std::string data = sstr.GetString();
820 help_text_ptr = new char[data.length()+1];
822 data.copy(help_text_ptr, data.length());
824 return help_text_ptr;
828 SummaryStringHelpTextCallback()
831 "A summary string is a way to extract information from variables in order to present them using a summary.\n"
832 "Summary strings contain static text, variables, scopes and control sequences:\n"
833 " - Static text can be any sequence of non-special characters, i.e. anything but '{', '}', '$', or '\\'.\n"
834 " - Variables are sequences of characters beginning with ${, ending with } and that contain symbols in the format described below.\n"
835 " - Scopes are any sequence of text between { and }. Anything included in a scope will only appear in the output summary if there were no errors.\n"
836 " - Control sequences are the usual C/C++ '\\a', '\\n', ..., plus '\\$', '\\{' and '\\}'.\n"
837 "A summary string works by copying static text verbatim, turning control sequences into their character counterpart, expanding variables and trying to expand scopes.\n"
838 "A variable is expanded by giving it a value other than its textual representation, and the way this is done depends on what comes after the ${ marker.\n"
839 "The most common sequence if ${var followed by an expression path, which is the text one would type to access a member of an aggregate types, given a variable of that type"
840 " (e.g. if type T has a member named x, which has a member named y, and if t is of type T, the expression path would be .x.y and the way to fit that into a summary string would be"
841 " ${var.x.y}). You can also use ${*var followed by an expression path and in that case the object referred by the path will be dereferenced before being displayed."
842 " If the object is not a pointer, doing so will cause an error. For additional details on expression paths, you can type 'help expr-path'. \n"
843 "By default, summary strings attempt to display the summary for any variable they reference, and if that fails the value. If neither can be shown, nothing is displayed."
844 "In a summary string, you can also use an array index [n], or a slice-like range [n-m]. This can have two different meanings depending on what kind of object the expression"
846 " - if it is a scalar type (any basic type like int, float, ...) the expression is a bitfield, i.e. the bits indicated by the indexing operator are extracted out of the number"
847 " and displayed as an individual variable\n"
848 " - if it is an array or pointer the array items indicated by the indexing operator are shown as the result of the variable. if the expression is an array, real array items are"
849 " printed; if it is a pointer, the pointer-as-array syntax is used to obtain the values (this means, the latter case can have no range checking)\n"
850 "If you are trying to display an array for which the size is known, you can also use [] instead of giving an exact range. This has the effect of showing items 0 thru size - 1.\n"
851 "Additionally, a variable can contain an (optional) format code, as in ${var.x.y%code}, where code can be any of the valid formats described in 'help format', or one of the"
852 " special symbols only allowed as part of a variable:\n"
853 " %V: show the value of the object by default\n"
854 " %S: show the summary of the object by default\n"
855 " %@: show the runtime-provided object description (for Objective-C, it calls NSPrintForDebugger; for C/C++ it does nothing)\n"
856 " %L: show the location of the object (memory address or a register name)\n"
857 " %#: show the number of children of the object\n"
858 " %T: show the type of the object\n"
859 "Another variable that you can use in summary strings is ${svar . This sequence works exactly like ${var, including the fact that ${*svar is an allowed sequence, but uses"
860 " the object's synthetic children provider instead of the actual objects. For instance, if you are using STL synthetic children providers, the following summary string would"
861 " count the number of actual elements stored in an std::list:\n"
862 "type summary add -s \"${svar%#}\" -x \"std::list<\"";
866 ExprPathHelpTextCallback()
869 "An expression path is the sequence of symbols that is used in C/C++ to access a member variable of an aggregate object (class).\n"
870 "For instance, given a class:\n"
876 "the expression to read item b in the item pointed to by next for foo aFoo would be aFoo.next->b.\n"
877 "Given that aFoo could just be any object of type foo, the string '.next->b' is the expression path, because it can be attached to any foo instance to achieve the effect.\n"
878 "Expression paths in LLDB include dot (.) and arrow (->) operators, and most commands using expression paths have ways to also accept the star (*) operator.\n"
879 "The meaning of these operators is the same as the usual one given to them by the C/C++ standards.\n"
880 "LLDB also has support for indexing ([ ]) in expression paths, and extends the traditional meaning of the square brackets operator to allow bitfield extraction:\n"
881 "for objects of native types (int, float, char, ...) saying '[n-m]' as an expression path (where n and m are any positive integers, e.g. [3-5]) causes LLDB to extract"
882 " bits n thru m from the value of the variable. If n == m, [n] is also allowed as a shortcut syntax. For arrays and pointers, expression paths can only contain one index"
883 " and the meaning of the operation is the same as the one defined by C/C++ (item extraction). Some commands extend bitfield-like syntax for arrays and pointers with the"
884 " meaning of array slicing (taking elements n thru m inside the array or pointed-to memory).";
888 CommandObject::FormatLongHelpText (Stream &output_strm, const char *long_help)
890 CommandInterpreter& interpreter = GetCommandInterpreter();
891 std::stringstream lineStream (long_help);
893 while (std::getline (lineStream, line)) {
898 size_t result = line.find_first_not_of (" \t");
899 if (result == std::string::npos) {
902 std::string whitespace_prefix = line.substr (0, result);
903 std::string remainder = line.substr (result);
904 interpreter.OutputFormattedHelpText(output_strm, whitespace_prefix.c_str(), remainder.c_str());
909 CommandObject::GenerateHelpText (CommandReturnObject &result)
911 GenerateHelpText(result.GetOutputStream());
913 result.SetStatus (eReturnStatusSuccessFinishNoResult);
917 CommandObject::GenerateHelpText (Stream &output_strm)
919 CommandInterpreter& interpreter = GetCommandInterpreter();
920 if (WantsRawCommandString())
922 std::string help_text(GetHelp());
923 help_text.append(" Expects 'raw' input (see 'help raw-input'.)");
924 interpreter.OutputFormattedHelpText(output_strm, "", "", help_text.c_str(), 1);
927 interpreter.OutputFormattedHelpText(output_strm, "", "", GetHelp(), 1);
928 output_strm.Printf("\nSyntax: %s\n", GetSyntax());
929 Options *options = GetOptions();
930 if (options != nullptr)
932 options->GenerateOptionUsage(output_strm, this);
934 const char *long_help = GetHelpLong();
935 if ((long_help != nullptr) && (strlen(long_help) > 0))
937 FormatLongHelpText(output_strm, long_help);
939 if (!IsDashDashCommand() && options && options->NumCommandOptions() > 0)
941 if (WantsRawCommandString() && !WantsCompletion())
943 // Emit the message about using ' -- ' between the end of the command options and the raw input
944 // conditionally, i.e., only if the command object does not want completion.
945 interpreter.OutputFormattedHelpText(
947 "\nImportant Note: Because this command takes 'raw' input, if you use any command options"
948 " you must use ' -- ' between the end of the command options and the beginning of the raw input.",
951 else if (GetNumArgumentEntries() > 0)
953 // Also emit a warning about using "--" in case you are using a command that takes options and arguments.
954 interpreter.OutputFormattedHelpText(
955 output_strm, "", "", "\nThis command takes options and free-form arguments. If your arguments resemble"
956 " option specifiers (i.e., they start with a - or --), you must use ' -- ' between"
957 " the end of the command options and the beginning of the arguments.",
964 CommandObject::AddIDsArgumentData(CommandArgumentEntry &arg, CommandArgumentType ID, CommandArgumentType IDRange)
966 CommandArgumentData id_arg;
967 CommandArgumentData id_range_arg;
969 // Create the first variant for the first (and only) argument for this command.
970 id_arg.arg_type = ID;
971 id_arg.arg_repetition = eArgRepeatOptional;
973 // Create the second variant for the first (and only) argument for this command.
974 id_range_arg.arg_type = IDRange;
975 id_range_arg.arg_repetition = eArgRepeatOptional;
977 // The first (and only) argument for this command could be either an id or an id_range.
978 // Push both variants into the entry for the first argument for this command.
979 arg.push_back(id_arg);
980 arg.push_back(id_range_arg);
984 CommandObject::GetArgumentTypeAsCString (const lldb::CommandArgumentType arg_type)
986 assert(arg_type < eArgTypeLastArg && "Invalid argument type passed to GetArgumentTypeAsCString");
987 return g_arguments_data[arg_type].arg_name;
991 CommandObject::GetArgumentDescriptionAsCString (const lldb::CommandArgumentType arg_type)
993 assert(arg_type < eArgTypeLastArg && "Invalid argument type passed to GetArgumentDescriptionAsCString");
994 return g_arguments_data[arg_type].help_text;
998 CommandObject::GetDummyTarget()
1000 return m_interpreter.GetDebugger().GetDummyTarget();
1004 CommandObject::GetSelectedOrDummyTarget(bool prefer_dummy)
1006 return m_interpreter.GetDebugger().GetSelectedOrDummyTarget(prefer_dummy);
1010 CommandObject::GetDefaultThread()
1012 Thread *thread_to_use = m_exe_ctx.GetThreadPtr();
1014 return thread_to_use;
1016 Process *process = m_exe_ctx.GetProcessPtr();
1019 Target *target = m_exe_ctx.GetTargetPtr();
1022 target = m_interpreter.GetDebugger().GetSelectedTarget().get();
1025 process = target->GetProcessSP().get();
1029 return process->GetThreadList().GetSelectedThread().get();
1035 CommandObjectParsed::Execute (const char *args_string, CommandReturnObject &result)
1037 bool handled = false;
1038 Args cmd_args (args_string);
1039 if (HasOverrideCallback())
1041 Args full_args (GetCommandName ());
1042 full_args.AppendArguments(cmd_args);
1043 handled = InvokeOverrideCallback (full_args.GetConstArgumentVector(), result);
1047 for (size_t i = 0; i < cmd_args.GetArgumentCount(); ++i)
1049 const char *tmp_str = cmd_args.GetArgumentAtIndex (i);
1050 if (tmp_str[0] == '`') // back-quote
1051 cmd_args.ReplaceArgumentAtIndex (i, m_interpreter.ProcessEmbeddedScriptCommands (tmp_str));
1054 if (CheckRequirements(result))
1056 if (ParseOptions (cmd_args, result))
1058 // Call the command-specific version of 'Execute', passing it the already processed arguments.
1059 handled = DoExecute (cmd_args, result);
1069 CommandObjectRaw::Execute (const char *args_string, CommandReturnObject &result)
1071 bool handled = false;
1072 if (HasOverrideCallback())
1074 std::string full_command (GetCommandName ());
1075 full_command += ' ';
1076 full_command += args_string;
1077 const char *argv[2] = { nullptr, nullptr };
1078 argv[0] = full_command.c_str();
1079 handled = InvokeOverrideCallback (argv, result);
1083 if (CheckRequirements(result))
1084 handled = DoExecute (args_string, result);
1092 const char *arch_helper()
1094 static StreamString g_archs_help;
1095 if (g_archs_help.Empty())
1098 ArchSpec::AutoComplete(nullptr, archs);
1099 g_archs_help.Printf("These are the supported architecture names:\n");
1100 archs.Join("\n", g_archs_help);
1102 return g_archs_help.GetData();
1105 CommandObject::ArgumentTableEntry CommandObject::g_arguments_data[] = {
1107 { eArgTypeAddress, "address", CommandCompletions::eNoCompletion, { nullptr, false }, "A valid address in the target program's execution space." },
1108 { eArgTypeAddressOrExpression, "address-expression", CommandCompletions::eNoCompletion, { nullptr, false }, "An expression that resolves to an address." },
1109 { eArgTypeAliasName, "alias-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of an abbreviation (alias) for a debugger command." },
1110 { eArgTypeAliasOptions, "options-for-aliased-command", CommandCompletions::eNoCompletion, { nullptr, false }, "Command options to be used as part of an alias (abbreviation) definition. (See 'help commands alias' for more information.)" },
1111 { eArgTypeArchitecture, "arch", CommandCompletions::eArchitectureCompletion, { arch_helper, true }, "The architecture name, e.g. i386 or x86_64." },
1112 { eArgTypeBoolean, "boolean", CommandCompletions::eNoCompletion, { nullptr, false }, "A Boolean value: 'true' or 'false'" },
1113 { eArgTypeBreakpointID, "breakpt-id", CommandCompletions::eNoCompletion, { BreakpointIDHelpTextCallback, false }, nullptr },
1114 { eArgTypeBreakpointIDRange, "breakpt-id-list", CommandCompletions::eNoCompletion, { BreakpointIDRangeHelpTextCallback, false }, nullptr },
1115 { eArgTypeBreakpointName, "breakpoint-name", CommandCompletions::eNoCompletion, { BreakpointNameHelpTextCallback, false }, nullptr },
1116 { eArgTypeByteSize, "byte-size", CommandCompletions::eNoCompletion, { nullptr, false }, "Number of bytes to use." },
1117 { eArgTypeClassName, "class-name", CommandCompletions::eNoCompletion, { nullptr, false }, "Then name of a class from the debug information in the program." },
1118 { eArgTypeCommandName, "cmd-name", CommandCompletions::eNoCompletion, { nullptr, false }, "A debugger command (may be multiple words), without any options or arguments." },
1119 { eArgTypeCount, "count", CommandCompletions::eNoCompletion, { nullptr, false }, "An unsigned integer." },
1120 { eArgTypeDirectoryName, "directory", CommandCompletions::eDiskDirectoryCompletion, { nullptr, false }, "A directory name." },
1121 { eArgTypeDisassemblyFlavor, "disassembly-flavor", CommandCompletions::eNoCompletion, { nullptr, false }, "A disassembly flavor recognized by your disassembly plugin. Currently the only valid options are \"att\" and \"intel\" for Intel targets" },
1122 { eArgTypeDescriptionVerbosity, "description-verbosity", CommandCompletions::eNoCompletion, { nullptr, false }, "How verbose the output of 'po' should be." },
1123 { eArgTypeEndAddress, "end-address", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1124 { eArgTypeExpression, "expr", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1125 { eArgTypeExpressionPath, "expr-path", CommandCompletions::eNoCompletion, { ExprPathHelpTextCallback, true }, nullptr },
1126 { eArgTypeExprFormat, "expression-format", CommandCompletions::eNoCompletion, { nullptr, false }, "[ [bool|b] | [bin] | [char|c] | [oct|o] | [dec|i|d|u] | [hex|x] | [float|f] | [cstr|s] ]" },
1127 { eArgTypeFilename, "filename", CommandCompletions::eDiskFileCompletion, { nullptr, false }, "The name of a file (can include path)." },
1128 { eArgTypeFormat, "format", CommandCompletions::eNoCompletion, { FormatHelpTextCallback, true }, nullptr },
1129 { eArgTypeFrameIndex, "frame-index", CommandCompletions::eNoCompletion, { nullptr, false }, "Index into a thread's list of frames." },
1130 { eArgTypeFullName, "fullname", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1131 { eArgTypeFunctionName, "function-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a function." },
1132 { eArgTypeFunctionOrSymbol, "function-or-symbol", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a function or symbol." },
1133 { eArgTypeGDBFormat, "gdb-format", CommandCompletions::eNoCompletion, { GDBFormatHelpTextCallback, true }, nullptr },
1134 { eArgTypeHelpText, "help-text", CommandCompletions::eNoCompletion, { nullptr, false }, "Text to be used as help for some other entity in LLDB" },
1135 { eArgTypeIndex, "index", CommandCompletions::eNoCompletion, { nullptr, false }, "An index into a list." },
1136 { eArgTypeLanguage, "source-language", CommandCompletions::eNoCompletion, { LanguageTypeHelpTextCallback, true }, nullptr },
1137 { eArgTypeLineNum, "linenum", CommandCompletions::eNoCompletion, { nullptr, false }, "Line number in a source file." },
1138 { eArgTypeLogCategory, "log-category", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a category within a log channel, e.g. all (try \"log list\" to see a list of all channels and their categories." },
1139 { eArgTypeLogChannel, "log-channel", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a log channel, e.g. process.gdb-remote (try \"log list\" to see a list of all channels and their categories)." },
1140 { eArgTypeMethod, "method", CommandCompletions::eNoCompletion, { nullptr, false }, "A C++ method name." },
1141 { eArgTypeName, "name", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1142 { eArgTypeNewPathPrefix, "new-path-prefix", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1143 { eArgTypeNumLines, "num-lines", CommandCompletions::eNoCompletion, { nullptr, false }, "The number of lines to use." },
1144 { eArgTypeNumberPerLine, "number-per-line", CommandCompletions::eNoCompletion, { nullptr, false }, "The number of items per line to display." },
1145 { eArgTypeOffset, "offset", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1146 { eArgTypeOldPathPrefix, "old-path-prefix", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1147 { eArgTypeOneLiner, "one-line-command", CommandCompletions::eNoCompletion, { nullptr, false }, "A command that is entered as a single line of text." },
1148 { eArgTypePath, "path", CommandCompletions::eDiskFileCompletion, { nullptr, false }, "Path." },
1149 { eArgTypePermissionsNumber, "perms-numeric", CommandCompletions::eNoCompletion, { nullptr, false }, "Permissions given as an octal number (e.g. 755)." },
1150 { eArgTypePermissionsString, "perms=string", CommandCompletions::eNoCompletion, { nullptr, false }, "Permissions given as a string value (e.g. rw-r-xr--)." },
1151 { eArgTypePid, "pid", CommandCompletions::eNoCompletion, { nullptr, false }, "The process ID number." },
1152 { eArgTypePlugin, "plugin", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1153 { eArgTypeProcessName, "process-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of the process." },
1154 { eArgTypePythonClass, "python-class", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a Python class." },
1155 { eArgTypePythonFunction, "python-function", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a Python function." },
1156 { eArgTypePythonScript, "python-script", CommandCompletions::eNoCompletion, { nullptr, false }, "Source code written in Python." },
1157 { eArgTypeQueueName, "queue-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of the thread queue." },
1158 { eArgTypeRegisterName, "register-name", CommandCompletions::eNoCompletion, { RegisterNameHelpTextCallback, true }, nullptr },
1159 { eArgTypeRegularExpression, "regular-expression", CommandCompletions::eNoCompletion, { nullptr, false }, "A regular expression." },
1160 { eArgTypeRunArgs, "run-args", CommandCompletions::eNoCompletion, { nullptr, false }, "Arguments to be passed to the target program when it starts executing." },
1161 { eArgTypeRunMode, "run-mode", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1162 { eArgTypeScriptedCommandSynchronicity, "script-cmd-synchronicity", CommandCompletions::eNoCompletion, { nullptr, false }, "The synchronicity to use to run scripted commands with regard to LLDB event system." },
1163 { eArgTypeScriptLang, "script-language", CommandCompletions::eNoCompletion, { nullptr, false }, "The scripting language to be used for script-based commands. Currently only Python is valid." },
1164 { eArgTypeSearchWord, "search-word", CommandCompletions::eNoCompletion, { nullptr, false }, "Any word of interest for search purposes." },
1165 { eArgTypeSelector, "selector", CommandCompletions::eNoCompletion, { nullptr, false }, "An Objective-C selector name." },
1166 { eArgTypeSettingIndex, "setting-index", CommandCompletions::eNoCompletion, { nullptr, false }, "An index into a settings variable that is an array (try 'settings list' to see all the possible settings variables and their types)." },
1167 { eArgTypeSettingKey, "setting-key", CommandCompletions::eNoCompletion, { nullptr, false }, "A key into a settings variables that is a dictionary (try 'settings list' to see all the possible settings variables and their types)." },
1168 { eArgTypeSettingPrefix, "setting-prefix", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a settable internal debugger variable up to a dot ('.'), e.g. 'target.process.'" },
1169 { eArgTypeSettingVariableName, "setting-variable-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a settable internal debugger variable. Type 'settings list' to see a complete list of such variables." },
1170 { eArgTypeShlibName, "shlib-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a shared library." },
1171 { eArgTypeSourceFile, "source-file", CommandCompletions::eSourceFileCompletion, { nullptr, false }, "The name of a source file.." },
1172 { eArgTypeSortOrder, "sort-order", CommandCompletions::eNoCompletion, { nullptr, false }, "Specify a sort order when dumping lists." },
1173 { eArgTypeStartAddress, "start-address", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1174 { eArgTypeSummaryString, "summary-string", CommandCompletions::eNoCompletion, { SummaryStringHelpTextCallback, true }, nullptr },
1175 { eArgTypeSymbol, "symbol", CommandCompletions::eSymbolCompletion, { nullptr, false }, "Any symbol name (function name, variable, argument, etc.)" },
1176 { eArgTypeThreadID, "thread-id", CommandCompletions::eNoCompletion, { nullptr, false }, "Thread ID number." },
1177 { eArgTypeThreadIndex, "thread-index", CommandCompletions::eNoCompletion, { nullptr, false }, "Index into the process' list of threads." },
1178 { eArgTypeThreadName, "thread-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The thread's name." },
1179 { eArgTypeTypeName, "type-name", CommandCompletions::eNoCompletion, { nullptr, false }, "A type name." },
1180 { eArgTypeUnsignedInteger, "unsigned-integer", CommandCompletions::eNoCompletion, { nullptr, false }, "An unsigned integer." },
1181 { eArgTypeUnixSignal, "unix-signal", CommandCompletions::eNoCompletion, { nullptr, false }, "A valid Unix signal name or number (e.g. SIGKILL, KILL or 9)." },
1182 { eArgTypeVarName, "variable-name", CommandCompletions::eNoCompletion, { nullptr, false }, "The name of a variable in your program." },
1183 { eArgTypeValue, "value", CommandCompletions::eNoCompletion, { nullptr, false }, "A value could be anything, depending on where and how it is used." },
1184 { eArgTypeWidth, "width", CommandCompletions::eNoCompletion, { nullptr, false }, "Help text goes here." },
1185 { eArgTypeNone, "none", CommandCompletions::eNoCompletion, { nullptr, false }, "No help available for this." },
1186 { eArgTypePlatform, "platform-name", CommandCompletions::ePlatformPluginCompletion, { nullptr, false }, "The name of an installed platform plug-in . Type 'platform list' to see a complete list of installed platforms." },
1187 { eArgTypeWatchpointID, "watchpt-id", CommandCompletions::eNoCompletion, { nullptr, false }, "Watchpoint IDs are positive integers." },
1188 { eArgTypeWatchpointIDRange, "watchpt-id-list", CommandCompletions::eNoCompletion, { nullptr, false }, "For example, '1-3' or '1 to 3'." },
1189 { eArgTypeWatchType, "watch-type", CommandCompletions::eNoCompletion, { nullptr, false }, "Specify the type for a watchpoint." },
1190 { eArgRawInput, "raw-input", CommandCompletions::eNoCompletion, { nullptr, false }, "Free-form text passed to a command without prior interpretation, allowing spaces without requiring quotes. To pass arguments and free form text put two dashes ' -- ' between the last argument and any raw input." }
1194 const CommandObject::ArgumentTableEntry*
1195 CommandObject::GetArgumentTable ()
1197 // If this assertion fires, then the table above is out of date with the CommandArgumentType enumeration
1198 assert ((sizeof (CommandObject::g_arguments_data) / sizeof (CommandObject::ArgumentTableEntry)) == eArgTypeLastArg);
1199 return CommandObject::g_arguments_data;