@c \input texinfo @c -*-texinfo-*- @c @c %**start of header @c @setfilename gdbmi.info @c @settitle GDB/MI Machine Interface @c @setchapternewpage off @c @c %**end of header @c @ifinfo @c This file documents GDB/MI, a Machine Interface to GDB. @c Copyright (C) 2000, Free Software Foundation, Inc. @c Contributed by Cygnus Solutions. @c Permission is granted to make and distribute verbatim copies of this @c manual provided the copyright notice and this permission notice are @c preserved on all copies. @c @ignore @c Permission is granted to process this file through TeX and print the @c results, provided the printed document carries copying permission notice @c identical to this one except for the removal of this paragraph (this @c paragraph not being relevant to the printed manual). @c @end ignore @c Permission is granted to copy and distribute modified versions of this @c manual under the conditions for verbatim copying, provided also that the @c entire resulting derived work is distributed under the terms of a @c permission notice identical to this one. @c Permission is granted to copy and distribute translations of this manual @c into another language, under the above conditions for modified versions. @c @end ifinfo @c @c This title page illustrates only one of the @c @c two methods of forming a title page. @c @titlepage @c @title GDB/MI @c @subtitle Version 0.2 @c @subtitle Feb 2000 @c @author Andrew Cagney, Fernando Nasser and Elena Zannoni @c @c The following two commands @c @c start the copyright page. @c @page @c @vskip 0pt plus 1filll @c Permission is granted to make and distribute verbatim copies of this @c manual provided the copyright notice and this permission notice are @c preserved on all copies. @c Copyright @copyright{} 2000, Free Software Foundation, Inc. @c @end titlepage @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% CHAPTER %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI @chapter The @sc{gdb/mi} Interface @unnumberedsec Function and Purpose @cindex @sc{gdb/mi}, its purpose @sc{gdb/mi} is a line based machine oriented text interface to @value{GDBN}. It is specifically intended to support the development of systems which use the debugger as just one small component of a larger system. This chapter is a specification of the @sc{gdb/mi} interface. It is written in the form of a reference manual. Note that @sc{gdb/mi} is still under construction, so some of the features described below are incomplete and subject to change. @unnumberedsec Notation and Terminology @cindex notational conventions, for @sc{gdb/mi} This chapter uses the following notation: @itemize @bullet @item @code{|} separates two alternatives. @item @code{[ @var{something} ]} indicates that @var{something} is optional: it may or may not be given. @item @code{( @var{group} )*} means that @var{group} inside the parentheses may repeat zero or more times. @item @code{( @var{group} )+} means that @var{group} inside the parentheses may repeat one or more times. @item @code{"@var{string}"} means a literal @var{string}. @end itemize @ignore @heading Dependencies @end ignore @heading Acknowledgments In alphabetic order: Andrew Cagney, Fernando Nasser, Stan Shebs and Elena Zannoni. @menu * GDB/MI Command Syntax:: * GDB/MI Compatibility with CLI:: * GDB/MI Output Records:: * GDB/MI Command Description Format:: * GDB/MI Breakpoint Table Commands:: * GDB/MI Data Manipulation:: * GDB/MI Program Control:: * GDB/MI Miscellaneous Commands:: * GDB/MI Stack Manipulation:: * GDB/MI Symbol Query:: * GDB/MI Target Manipulation:: * GDB/MI Thread Commands:: * GDB/MI Tracepoint Commands:: * GDB/MI Variable Objects:: * GDB/MI Draft Changes to Output Syntax:: @end menu @c When these are implemented, they should be moved to be between Misc and @c Stack Manipulation in the above menu. They are now outside the menu @c because makeinfo 3.12 barfs if it sees @ignore or @comments in the @c middle of a menu. @ignore * GDB/MI Kod Commands:: * GDB/MI Memory Overlay Commands:: * GDB/MI Signal Handling Commands:: @end ignore @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Command Syntax @section @sc{gdb/mi} Command Syntax @menu * GDB/MI Input Syntax:: * GDB/MI Output Syntax:: * GDB/MI Simple Examples:: @end menu @node GDB/MI Input Syntax @subsection @sc{gdb/mi} Input Syntax @cindex input syntax for @sc{gdb/mi} @cindex @sc{gdb/mi}, input syntax @table @code @item @var{command} @expansion{} @code{@var{cli-command} | @var{mi-command}} @item @var{cli-command} @expansion{} @code{[ @var{token} ] @var{cli-command} @var{nl}}, where @var{cli-command} is any existing @value{GDBN} CLI command. @item @var{mi-command} @expansion{} @code{[ @var{token} ] "-" @var{operation} ( " " @var{option} )* @code{[} " --" @code{]} ( " " @var{parameter} )* @var{nl}} @item @var{token} @expansion{} "any sequence of digits" @item @var{option} @expansion{} @code{"-" @var{parameter} [ " " @var{parameter} ]} @item @var{parameter} @expansion{} @code{@var{non-blank-sequence} | @var{c-string}} @item @var{operation} @expansion{} @emph{any of the operations described in this chapter} @item @var{non-blank-sequence} @expansion{} @emph{anything, provided it doesn't contain special characters such as "-", @var{nl}, """ and of course " "} @item @var{c-string} @expansion{} @code{""" @var{seven-bit-iso-c-string-content} """} @item @var{nl} @expansion{} @code{CR | CR-LF} @end table @noindent Notes: @itemize @bullet @item The CLI commands are still handled by the @sc{mi} interpreter; their output is described below. @item The @code{@var{token}}, when present, is passed back when the command finishes. @item Some @sc{mi} commands accept optional arguments as part of the parameter list. Each option is identified by a leading @samp{-} (dash) and may be followed by an optional argument parameter. Options occur first in the parameter list and can be delimited from normal parameters using @samp{--} (this is useful when some parameters begin with a dash). @end itemize Pragmatics: @itemize @bullet @item We want easy access to the existing CLI syntax (for debugging). @item We want it to be easy to spot a @sc{mi} operation. @end itemize @node GDB/MI Output Syntax @subsection @sc{gdb/mi} Output Syntax @cindex output syntax of @sc{gdb/mi} @cindex @sc{gdb/mi}, output syntax The output from @sc{gdb/mi} consists of zero or more out-of-band records followed, optionally, by a single result record. This result record is for the most recent command. The sequence of output records is terminated by @samp{(@value{GDBP})}. If an input command was prefixed with a @code{@var{token}} then the corresponding output for that command will also be prefixed by that same @var{token}. @table @code @item @var{output} @expansion{} @code{( @var{out-of-band-record} )* [ @var{result-record} ] "(gdb)" @var{nl}} @item @var{result-record} @expansion{} @code{ [ @var{token} ] "^" @var{result-class} ( "," @var{result} )* @var{nl}} @item @var{out-of-band-record} @expansion{} @code{@var{async-record} | @var{stream-record}} @item @var{async-record} @expansion{} @code{@var{exec-async-output} | @var{status-async-output} | @var{notify-async-output}} @item @var{exec-async-output} @expansion{} @code{[ @var{token} ] "*" @var{async-output}} @item @var{status-async-output} @expansion{} @code{[ @var{token} ] "+" @var{async-output}} @item @var{notify-async-output} @expansion{} @code{[ @var{token} ] "=" @var{async-output}} @item @var{async-output} @expansion{} @code{@var{async-class} ( "," @var{result} )* @var{nl}} @item @var{result-class} @expansion{} @code{"done" | "running" | "connected" | "error" | "exit"} @item @var{async-class} @expansion{} @code{"stopped" | @var{others}} (where @var{others} will be added depending on the needs---this is still in development). @item @var{result} @expansion{} @code{[ @var{string} "=" ] @var{value}} @item @var{value} @expansion{} @code{@var{const} | "@{" @var{result} ( "," @var{result} )* "@}"} @item @var{const} @expansion{} @code{@var{c-string}} @item @var{stream-record} @expansion{} @code{@var{console-stream-output} | @var{target-stream-output} | @var{log-stream-output}} @item @var{console-stream-output} @expansion{} @code{"~" @var{c-string}} @item @var{target-stream-output} @expansion{} @code{"@@" @var{c-string}} @item @var{log-stream-output} @expansion{} @code{"&" @var{c-string}} @item @var{nl} @expansion{} @code{CR | CR-LF} @item @var{token} @expansion{} @emph{any sequence of digits}. @end table @noindent In addition, the following are still being developed: @table @code @item @var{query} This action is currently undefined. @end table @noindent Notes: @itemize @bullet @item All output sequences end in a single line containing a period. @item The @code{@var{token}} is from the corresponding request. If an execution command is interrupted by the @samp{-exec-interrupt} command, the @var{token} associated with the @samp{*stopped} message is the one of the original execution command, not the one of the interrupt command. @item @cindex status output in @sc{gdb/mi} @var{status-async-output} contains on-going status information about the progress of a slow operation. It can be discarded. All status output is prefixed by @samp{+}. @item @cindex async output in @sc{gdb/mi} @var{exec-async-output} contains asynchronous state change on the target (stopped, started, disappeared). All async output is prefixed by @samp{*}. @item @cindex notify output in @sc{gdb/mi} @var{notify-async-output} contains supplementary information that the client should handle (e.g., a new breakpoint information). All notify output is prefixed by @samp{=}. @item @cindex console output in @sc{gdb/mi} @var{console-stream-output} is output that should be displayed as is in the console. It is the textual response to a CLI command. All the console output is prefixed by @samp{~}. @item @cindex target output in @sc{gdb/mi} @var{target-stream-output} is the output produced by the target program. All the target output is prefixed by @samp{@@}. @item @cindex log output in @sc{gdb/mi} @var{log-stream-output} is output text coming from @value{GDBN}'s internals, for instance messages that should be displayed as part of an error log. All the log output is prefixed by @samp{&}. @end itemize @xref{GDB/MI Stream Records, , @sc{gdb/mi} Stream Records}, for more details about the various output records. @xref{GDB/MI Draft Changes to Output Syntax, , @sc{gdb/mi} Draft Changes to Output Syntax}, for proposed revisions to the current output syntax. @node GDB/MI Simple Examples @subsection Simple Examples of @sc{gdb/mi} Interaction @cindex @sc{gdb/mi}, simple examples This subsection presents several simple examples of interaction using the @sc{gdb/mi} interface. In these examples, @samp{->} means that the following line is passed to @sc{gdb/mi} as input, while @samp{<-} means the output received from @sc{gdb/mi}. @subsubheading Target Stop Here's an example of stopping the inferior process: @example -> -stop <- (@value{GDBP}) @end example @noindent and later: @example <- *stop,reason="stop",address="0x123",source="a.c:123" <- (@value{GDBP}) @end example @subsubheading Simple CLI Command Here's an example of a simple CLI command being passed through @sc{gdb/mi} and on to the CLI. @example -> print 1+2 <- ~3\n <- (@value{GDBP}) @end example @subsubheading Command With Side Effects @example -> -symbol-file xyz.exe <- *breakpoint,nr="3",address="0x123",source="a.c:123" <- (@value{GDBP}) @end example @subsubheading A Bad Command Here's what happens if you pass a non-existent command: @example -> -rubbish <- error,"Rubbish not found" <- (@value{GDBP}) @end example @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Compatibility with CLI @section @sc{gdb/mi} Compatibility with CLI @cindex compatibility, @sc{gdb/mi} and CLI @cindex @sc{gdb/mi}, compatibility with CLI To help users familiar with @value{GDBN}'s existing CLI interface, @sc{gdb/mi} accepts existing CLI commands. As specified by the syntax, such commands can be directly entered into the @sc{gdb/mi} interface and @value{GDBN} will respond. This mechanism is provided as an aid to developers of @sc{gdb/mi} clients and not as a reliable interface into the CLI. Since the command is being interpreteted in an environment that assumes @sc{gdb/mi} behaviour, the exact output of such commands is likely to end up being an un-supported hybrid of @sc{gdb/mi} and CLI output. @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Output Records @section @sc{gdb/mi} Output Records @menu * GDB/MI Result Records:: * GDB/MI Stream Records:: * GDB/MI Out-of-band Records:: @end menu @node GDB/MI Result Records @subsection @sc{gdb/mi} Result Records @cindex result records in @sc{gdb/mi} @cindex @sc{gdb/mi}, result records In addition to a number of out-of-band notifications, the response to a @sc{gdb/mi} command includes one of the following result indications: @table @code @findex ^done @item "^done" [ "," @var{results} ] The synchronous operation was successful, @code{@var{results}} are the return values. @item "^running" @findex ^running @c Is this one correct? Should it be an out-of-band notification? The asynchronous operation was successfully started. The target is running. @item "^error" "," @var{c-string} @findex ^error The operation failed. The @code{@var{c-string}} contains the corresponding error message. @end table @node GDB/MI Stream Records @subsection @sc{gdb/mi} Stream Records @cindex @sc{gdb/mi}, stream records @cindex stream records in @sc{gdb/mi} @value{GDBN} internally maintains a number of output streams: the console, the target, and the log. The output intended for each of these streams is funneled through the @sc{gdb/mi} interface using @dfn{stream records}. Each stream record begins with a unique @dfn{prefix character} which identifies its stream (@pxref{GDB/MI Output Syntax, , @sc{gdb/mi} Output Syntax}). In addition to the prefix, each stream record contains a @code{@var{string-output}}. This is either raw text (with an implicit new line) or a quoted C string (which does not contain an implicit newline). @table @code @item "~" @var{string-output} The console output stream contains text that should be displayed in the CLI console window. It contains the textual responses to CLI commands. @item "@@" @var{string-output} The target output stream contains any textual output from the running target. @item "&" @var{string-output} The log stream contains debugging messages being produced by @value{GDBN}'s internals. @end table @node GDB/MI Out-of-band Records @subsection @sc{gdb/mi} Out-of-band Records @cindex out-of-band records in @sc{gdb/mi} @cindex @sc{gdb/mi}, out-of-band records @dfn{Out-of-band} records are used to notify the @sc{gdb/mi} client of additional changes that have occurred. Those changes can either be a consequence of @sc{gdb/mi} (e.g., a breakpoint modified) or a result of target activity (e.g., target stopped). The following is a preliminary list of possible out-of-band records. @table @code @item "*" "stop" @end table @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Command Description Format @section @sc{gdb/mi} Command Description Format The remaining sections describe blocks of commands. Each block of commands is laid out in a fashion similar to this section. Note the the line breaks shown in the examples are here only for readability. They don't appear in the real output. Also note that the commands with a non-available example (N.A.@:) are not yet implemented. @subheading Motivation The motivation for this collection of commands. @subheading Introduction A brief introduction to this collection of commands as a whole. @subheading Commands For each command in the block, the following is described: @subsubheading Synopsis @example -command @var{args}@dots{} @end example @subsubheading @value{GDBN} Command The corresponding @value{GDBN} CLI command. @subsubheading Result @subsubheading Out-of-band @subsubheading Notes @subsubheading Example @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Breakpoint Table Commands @section @sc{gdb/mi} Breakpoint table commands @cindex breakpoint commands for @sc{gdb/mi} @cindex @sc{gdb/mi}, breakpoint commands This section documents @sc{gdb/mi} commands for manipulating breakpoints. @subheading The @code{-break-after} Command @findex -break-after @subsubheading Synopsis @example -break-after @var{number} @var{count} @end example The breakpoint number @var{number} is not in effect until it has been hit @var{count} times. To see how this is reflected in the output of the @samp{-break-list} command, see the description of the @samp{-break-list} command below. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{ignore}. @subsubheading Example @smallexample (@value{GDBP}) -break-insert main ^done,bkpt=@{number="1",addr="0x000100d0",file="hello.c",line="5"@} (@value{GDBP}) -break-after 1 3 ~ ^done (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", addr="0x000100d0",func="main",file="hello.c",line="5",times="0", ignore="3"@}@} (@value{GDBP}) @end smallexample @ignore @subheading The @code{-break-catch} Command @findex -break-catch @subheading The @code{-break-commands} Command @findex -break-commands @end ignore @subheading The @code{-break-condition} Command @findex -break-condition @subsubheading Synopsis @example -break-condition @var{number} @var{expr} @end example Breakpoint @var{number} will stop the program only if the condition in @var{expr} is true. The condition becomes part of the @samp{-break-list} output (see the description of the @samp{-break-list} command below). @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{condition}. @subsubheading Example @smallexample (@value{GDBP}) -break-condition 1 1 ^done (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", addr="0x000100d0",func="main",file="hello.c",line="5",cond="1", times="0",ignore="3"@}@} (@value{GDBP}) @end smallexample @subheading The @code{-break-delete} Command @findex -break-delete @subsubheading Synopsis @example -break-delete ( @var{breakpoint} )+ @end example Delete the breakpoint(s) whose number(s) are specified in the argument list. This is obviously reflected in the breakpoint list. @subsubheading @value{GDBN} command The corresponding @value{GDBN} command is @samp{delete}. @subsubheading Example @example (@value{GDBP}) -break-delete 1 ^done (@value{GDBP}) -break-list ^done,BreakpointTable=@{@} (@value{GDBP}) @end example @subheading The @code{-break-disable} Command @findex -break-disable @subsubheading Synopsis @example -break-disable ( @var{breakpoint} )+ @end example Disable the named @var{breakpoint}(s). The field @samp{enabled} in the break list is now set to @samp{n} for the named @var{breakpoint}(s). @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{disable}. @subsubheading Example @smallexample (@value{GDBP}) -break-disable 2 ^done (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="2",type="breakpoint",disp="keep",enabled="n", addr="0x000100d0",func="main",file="hello.c",line="5",times="0"@}@} (@value{GDBP}) @end smallexample @subheading The @code{-break-enable} Command @findex -break-enable @subsubheading Synopsis @example -break-enable ( @var{breakpoint} )+ @end example Enable (previously disabled) @var{breakpoint}(s). @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{enable}. @subsubheading Example @smallexample (@value{GDBP}) -break-enable 2 ^done (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="2",type="breakpoint",disp="keep",enabled="y", addr="0x000100d0",func="main",file="hello.c",line="5",times="0"@}@} (@value{GDBP}) @end smallexample @subheading The @code{-break-info} Command @findex -break-info @subsubheading Synopsis @example -break-info @var{breakpoint} @end example @c REDUNDANT??? Get information about a single breakpoint. @subsubheading @value{GDBN} command The corresponding @value{GDBN} command is @samp{info break @var{breakpoint}}. @subsubheading Example N.A. @subheading The @code{-break-insert} Command @findex -break-insert @subsubheading Synopsis @example -break-insert [ -t ] [ -h ] [ -r ] [ -c @var{condition} ] [ -i @var{ignore-count} ] [ -p @var{thread} ] [ @var{line} | @var{addr} ] @end example @noindent If specified, @var{line}, can be one of: @itemize @bullet @item function @c @item +offset @c @item -offset @c @item linenum @item filename:linenum @item filename:function @item *address @end itemize The possible optional parameters of this command are: @table @samp @item -t Insert a tempoary breakpoint. @item -h Insert a hardware breakpoint. @item -c @var{condition} Make the breakpoint conditional on @var{condition}. @item -i @var{ignore-count} Initialize the @var{ignore-count}. @item -r Insert a regular breakpoint in all the functions whose names match the given regular expression. Other flags are not applicable to regular expresson. @end table @subsubheading Result The result is in the form: @example ^done,bkptno="@var{number}",func="@var{funcname}", file="@var{filename}",line="@var{lineno}" @end example @noindent where @var{number} is the @value{GDBN} number for this breakpoint, @var{funcname} is the name of the function where the breakpoint was inserted, @var{filename} is the name of the source file which contains this function, and @var{lineno} is the source line number within that file. Note: this format is open to change. @c An out-of-band breakpoint instead of part of the result? @subsubheading @value{GDBN} Command The corresponding @value{GDBN} commands are @samp{break}, @samp{tbreak}, @samp{hbreak}, @samp{thbreak}, and @samp{rbreak}. @subsubheading Example @smallexample (@value{GDBP}) -break-insert main ^done,bkpt=@{number="1",addr="0x0001072c",file="recursive2.c",line="4"@} (@value{GDBP}) -break-insert -t foo ^done,bkpt=@{number="2",addr="0x00010774",file="recursive2.c",line="11"@} (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", addr="0x0001072c", func="main",file="recursive2.c",line="4",times="0"@}, bkpt=@{number="2",type="breakpoint",disp="del",enabled="y", addr="0x00010774",func="foo",file="recursive2.c",line="11",times="0"@}@} (@value{GDBP}) -break-insert -r foo.* ~int foo(int, int); ^done,bkpt=@{number="3",addr="0x00010774",file="recursive2.c",line="11"@} (@value{GDBP}) @end smallexample @subheading The @code{-break-list} Command @findex -break-list @subsubheading Synopsis @example -break-list @end example Displays the list of inserted breakpoints, showing the following fields: @table @samp @item Number number of the breakpoint @item Type type of the breakpoint: @samp{breakpoint} or @samp{watchpoint} @item Disposition should the breakpoint be deleted or disabled when it is hit: @samp{keep} or @samp{nokeep} @item Enabled is the breakpoint enabled or no: @samp{y} or @samp{n} @item Address memory location at which the breakpoint is set @item What logical location of the breakpoint, expressed by function name, file name, line number @item Times number of times the breakpoint has been hit @end table If there are no breakpoints or watchpoints, the @code{BreakpointTable} field is an empty list. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{info break}. @subsubheading Example @smallexample (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", addr="0x000100d0",func="main",file="hello.c",line="5",times="0"@}, bkpt=@{number="2",type="breakpoint",disp="keep",enabled="y", addr="0x00010114",func="foo",file="hello.c",line="13",times="0"@}@} (@value{GDBP}) @end smallexample Here's an example of the result when there are no breakpoints: @smallexample (@value{GDBP}) -break-list ^done,BreakpointTable=@{@} (@value{GDBP}) @end smallexample @subheading The @code{-break-watch} Command @findex -break-watch @subsubheading Synopsis @example -break-watch [ -a | -r ] @end example Create a watchpoint. With the @samp{-a} option it will create an @dfn{access} watchpoint, i.e. a watchpoint that triggers either on a read from or on a write to the memory location. With the @samp{-r} option, the watchpoint created is a @dfn{read} watchpoint, i.e. it will trigger only when the memory location is accessed for reading. Without either of the options, the watchpoint created is a regular watchpoint, i.e. it will trigger when the memory location is accessed for writing. @xref{Set Watchpoints, , Setting watchpoints}. Note that @samp{-break-list} will report a single list of watchpoints and breakpoints inserted. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} commands are @samp{watch}, @samp{awatch}, and @samp{rwatch}. @subsubheading Example Setting a watchpoint on a variable in the @code{main} function: @smallexample (@value{GDBP}) -break-watch x ^done,wpt=@{number="2",exp="x"@} (@value{GDBP}) -exec-continue ^running ^done,reason="watchpoint-trigger",wpt=@{number="2",exp="x"@}, value=@{old="-268439212",new="55"@}, frame=@{func="main",args=@{@},file="recursive2.c",line="5"@} (@value{GDBP}) @end smallexample Setting a watchpoint on a variable local to a function. @value{GDBN} will stop the program execution twice: first for the variable changing value, then for the watchpoint going out of scope. @smallexample (@value{GDBP}) -break-watch C ^done,wpt=@{number="5",exp="C"@} (@value{GDBP}) -exec-continue ^running ^done,reason="watchpoint-trigger", wpt=@{number="5",exp="C"@},value=@{old="-276895068",new="3"@}, frame=@{func="callee4",args=@{@}, file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="13"@} (@value{GDBP}) -exec-continue ^running ^done,reason="watchpoint-scope",wpnum="5", frame=@{func="callee3",args=@{@{name="strarg", value="0x11940 \"A string argument.\""@}@}, file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="18"@} (@value{GDBP}) @end smallexample Listing breakpoints and watchpoints, at different points in the program execution. Note that once the watchpoint goes out of scope, it is deleted. @smallexample (@value{GDBP}) -break-watch C ^done,wpt=@{number="2",exp="C"@} (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", addr="0x00010734",func="callee4", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="8",times="1"@}, bkpt=@{number="2",type="watchpoint",disp="keep", enabled="y",addr="",what="C",times="0"@}@} (@value{GDBP}) -exec-continue ^running ^done,reason="watchpoint-trigger",wpt=@{number="2",exp="C"@}, value=@{old="-276895068",new="3"@}, frame=@{func="callee4",args=@{@}, file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="13"@} (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", addr="0x00010734",func="callee4", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="8",times="1"@}, bkpt=@{number="2",type="watchpoint",disp="keep", enabled="y",addr="",what="C",times="-5"@}@} (@value{GDBP}) -exec-continue ^running ^done,reason="watchpoint-scope",wpnum="2", frame=@{func="callee3",args=@{@{name="strarg", value="0x11940 \"A string argument.\""@}@}, file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="18"@} (@value{GDBP}) -break-list ^done,BreakpointTable=@{hdr=@{"Num","Type","Disp","Enb","Address","What"@}, bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", addr="0x00010734",func="callee4", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="8",times="1"@}@} (@value{GDBP}) @end smallexample @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Data Manipulation @section @sc{gdb/mi} Data Manipulation @cindex data manipulation, in @sc{gdb/mi} @cindex @sc{gdb/mi}, data manipulation This section describes the @sc{gdb/mi} commands that manipulate data: examine memory and registers, evaluate expressions, etc. @c REMOVED FROM THE INTERFACE. @c @subheading -data-assign @c Change the value of a program variable. Plenty of side effects. @c @subsubheading GDB command @c set variable @c @subsubheading Example @c N.A. @subheading The @code{-data-disassemble} Command @findex -data-disassemble @subsubheading Synopsis @example -data-disassemble [ -s @var{start-addr} -e @var{end-addr} ] | [ -f @var{filename} -l @var{linenum} [ -n @var{lines} ] ] -- @var{mode} @end example @noindent Where: @table @samp @item @var{start-addr} is the beginning address (or @code{$pc}) @item @var{end-addr} is the end address @item @var{filename} is the name of the file to disassemble @item @var{linenum} is the line number to disassemble around @item @var{lines} is the the number of disassembly lines to be produced. If it is -1, the whole function will be disassembled, in case no @var{end-addr} is specified. If @var{end-addr} is specified as a non-zero value, and @var{lines} is lower than the number of disassembly lines between @var{start-addr} and @var{end-addr}, only @var{lines} lines are displayed; if @var{lines} is higher than the number of lines between @var{start-addr} and @var{end-addr}, only the lines up to @var{end-addr} are displayed. @item @var{mode} is either 0 (meaning only disassembly) or 1 (meaning mixed source and disassembly). @end table @subsubheading Result The output for each instruction is composed of four fields: @itemize @bullet @item Address @item Func-name @item Offset @item Instruction @end itemize Note that whatever included in the instruction field, is not manipulated directely by @sc{gdb/mi}, i.e. it is not possible to adjust its format. @subsubheading @value{GDBN} Command There's no direct mapping from this command to the CLI. @subsubheading Example Disassemble from the current value of @code{$pc} to @code{$pc + 20}: @smallexample (@value{GDBP}) -data-disassemble -s $pc -e "$pc + 20" -- 0 ^done, asm_insns=@{ @{address="0x000107c0",func-name="main",offset="4", inst="mov 2, %o0"@}, @{address="0x000107c4",func-name="main",offset="8", inst="sethi %hi(0x11800), %o2"@}, @{address="0x000107c8",func-name="main",offset="12", inst="or %o2, 0x140, %o1\t! 0x11940 <_lib_version+8>"@}, @{address="0x000107cc",func-name="main",offset="16", inst="sethi %hi(0x11800), %o2"@}, @{address="0x000107d0",func-name="main",offset="20", inst="or %o2, 0x168, %o4\t! 0x11968 <_lib_version+48>"@}@} (@value{GDBP}) @end smallexample Disassemble the whole @code{main} function. Line 32 is part of @code{main}. @smallexample -data-disassemble -f basics.c -l 32 -- 0 ^done,asm_insns=@{ @{address="0x000107bc",func-name="main",offset="0", inst="save %sp, -112, %sp"@}, @{address="0x000107c0",func-name="main",offset="4", inst="mov 2, %o0"@}, @{address="0x000107c4",func-name="main",offset="8", inst="sethi %hi(0x11800), %o2"@}, [@dots{}] @{address="0x0001081c",func-name="main",offset="96",inst="ret "@}, @{address="0x00010820",func-name="main",offset="100",inst="restore "@}@} (@value{GDBP}) @end smallexample Disassemble 3 instructions from the start of @code{main}: @smallexample (@value{GDBP}) -data-disassemble -f basics.c -l 32 -n 3 -- 0 ^done,asm_insns=@{ @{address="0x000107bc",func-name="main",offset="0", inst="save %sp, -112, %sp"@}, @{address="0x000107c0",func-name="main",offset="4", inst="mov 2, %o0"@}, @{address="0x000107c4",func-name="main",offset="8", inst="sethi %hi(0x11800), %o2"@}@} (@value{GDBP}) @end smallexample Disassemble 3 instructions from the start of @code{main} in mixed mode: @smallexample (@value{GDBP}) -data-disassemble -f basics.c -l 32 -n 3 -- 1 ^done,asm_insns=@{ src_and_asm_line=@{line="31", file="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb/ \ testsuite/gdb.mi/basics.c",line_asm_insn=@{ @{address="0x000107bc",func-name="main",offset="0", inst="save %sp, -112, %sp"@}@}@}, src_and_asm_line=@{line="32", file="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb/ \ testsuite/gdb.mi/basics.c",line_asm_insn=@{ @{address="0x000107c0",func-name="main",offset="4", inst="mov 2, %o0"@}, @{address="0x000107c4",func-name="main",offset="8", inst="sethi %hi(0x11800), %o2"@}@}@}@} (@value{GDBP}) @end smallexample @subheading The @code{-data-evaluate-expression} Command @findex -data-evaluate-expression @subsubheading Synopsis @example -data-evaluate-expression @var{expr} @end example Evaluate @var{expr} as an expression. The expression could contain an inferior function call. The function call will execute synchronously. If the expression contains spaces, it must be enclosed in double quotes. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} commands are @samp{print}, @samp{output}, and @samp{call}. In @code{gdbtk} only, there's a corresponding @samp{gdb_eval} command. @subsubheading Example In the following example, the numbers that precede the commands are the @dfn{tokens} described in @ref{GDB/MI Command Syntax, ,@sc{gdb/mi} Command Syntax}. Notice how @sc{gdb/mi} returns the same tokens in its output. @smallexample 211-data-evaluate-expression A 211^done,value="1" (@value{GDBP}) 311-data-evaluate-expression &A 311^done,value="0xefffeb7c" (@value{GDBP}) 411-data-evaluate-expression A+3 411^done,value="4" (@value{GDBP}) 511-data-evaluate-expression "A + 3" 511^done,value="4" (@value{GDBP}) @end smallexample @subheading The @code{-data-list-changed-registers} Command @findex -data-list-changed-registers @subsubheading Synopsis @example -data-list-changed-registers @end example Display a list of the registers that have changed. @subsubheading @value{GDBN} Command @value{GDBN} doesn't have a direct analog for this command; @code{gdbtk} has the corresponding command @samp{gdb_changed_register_list}. @subsubheading Example On a PPC MBX board: @smallexample (@value{GDBP}) -exec-continue ^running (@value{GDBP}) *stopped,reason="breakpoint-hit",bkptno="1",frame=@{func="main", args=@{@},file="try.c",line="5"@} (@value{GDBP}) -data-list-changed-registers ^done,changed-registers=@{"0","1","2","4","5","6","7","8","9", "10","11","13","14","15","16","17","18","19","20","21","22","23", "24","25","26","27","28","30","31","64","65","66","67","69"@} (@value{GDBP}) @end smallexample @subheading The @code{-data-list-register-names} Command @findex -data-list-register-names @subsubheading Synopsis @example -data-list-register-names [ ( @var{regno} )+ ] @end example Show a list of register names for the current target. If no arguments are given, it shows a list of the names of all the registers. If integer numbers are given as arguments, it will print a list of the names of the registers corresponding to the arguments. @subsubheading @value{GDBN} Command @value{GDBN} does not have a command which corresponds to @samp{-data-list-register-names}. In @code{gdbtk} there is a corresponding command @samp{gdb_regnames}. @subsubheading Example For the PPC MBX board: @smallexample (@value{GDBP}) -data-list-register-names ^done,register-names=@{"r0","r1","r2","r3","r4","r5","r6","r7", "r8","r9","r10","r11","r12","r13","r14","r15","r16","r17","r18", "r19","r20","r21","r22","r23","r24","r25","r26","r27","r28","r29", "r30","r31","f0","f1","f2","f3","f4","f5","f6","f7","f8","f9", "f10","f11","f12","f13","f14","f15","f16","f17","f18","f19","f20", "f21","f22","f23","f24","f25","f26","f27","f28","f29","f30","f31", "pc","ps","cr","lr","ctr","xer"@} (@value{GDBP}) -data-list-register-names 1 2 3 ^done,register-names=@{"r1","r2","r3"@} (@value{GDBP}) @end smallexample @subheading The @code{-data-list-register-values} Command @findex -data-list-register-values @subsubheading Synopsis @example -data-list-register-values @var{fmt} [ ( @var{regno} )*] @end example Display the registers' contents. @var{fmt} is the format according to which the registers' contents are to be returned, followed by an optional list of numbers specifying the registers to display. A missing list of numbers indicates that the contents of all the registers must be returned. Allowed formats for @var{fmt} are: @table @code @item x Hexadecimal @item o Octal @item t Binary @item d Decimal @item r Raw @item N Natural @end table @subsubheading @value{GDBN} Command The corresponding @value{GDBN} commands are @samp{info reg}, @samp{info all-reg}, and (in @code{gdbtk}) @samp{gdb_fetch_registers}. @subsubheading Example For a PPC MBX board (note: line breaks are for readability only, they don't appear in the actual output): @smallexample (@value{GDBP}) -data-list-register-values r 64 65 ^done,register-values=@{@{number="64",value="0xfe00a300"@}, @{number="65",value="0x00029002"@}@} (@value{GDBP}) -data-list-register-values x ^done,register-values=@{@{number="0",value="0xfe0043c8"@}, @{number="1",value="0x3fff88"@},@{number="2",value="0xfffffffe"@}, @{number="3",value="0x0"@},@{number="4",value="0xa"@}, @{number="5",value="0x3fff68"@},@{number="6",value="0x3fff58"@}, @{number="7",value="0xfe011e98"@},@{number="8",value="0x2"@}, @{number="9",value="0xfa202820"@},@{number="10",value="0xfa202808"@}, @{number="11",value="0x1"@},@{number="12",value="0x0"@}, @{number="13",value="0x4544"@},@{number="14",value="0xffdfffff"@}, @{number="15",value="0xffffffff"@},@{number="16",value="0xfffffeff"@}, @{number="17",value="0xefffffed"@},@{number="18",value="0xfffffffe"@}, @{number="19",value="0xffffffff"@},@{number="20",value="0xffffffff"@}, @{number="21",value="0xffffffff"@},@{number="22",value="0xfffffff7"@}, @{number="23",value="0xffffffff"@},@{number="24",value="0xffffffff"@}, @{number="25",value="0xffffffff"@},@{number="26",value="0xfffffffb"@}, @{number="27",value="0xffffffff"@},@{number="28",value="0xf7bfffff"@}, @{number="29",value="0x0"@},@{number="30",value="0xfe010000"@}, @{number="31",value="0x0"@},@{number="32",value="0x0"@}, @{number="33",value="0x0"@},@{number="34",value="0x0"@}, @{number="35",value="0x0"@},@{number="36",value="0x0"@}, @{number="37",value="0x0"@},@{number="38",value="0x0"@}, @{number="39",value="0x0"@},@{number="40",value="0x0"@}, @{number="41",value="0x0"@},@{number="42",value="0x0"@}, @{number="43",value="0x0"@},@{number="44",value="0x0"@}, @{number="45",value="0x0"@},@{number="46",value="0x0"@}, @{number="47",value="0x0"@},@{number="48",value="0x0"@}, @{number="49",value="0x0"@},@{number="50",value="0x0"@}, @{number="51",value="0x0"@},@{number="52",value="0x0"@}, @{number="53",value="0x0"@},@{number="54",value="0x0"@}, @{number="55",value="0x0"@},@{number="56",value="0x0"@}, @{number="57",value="0x0"@},@{number="58",value="0x0"@}, @{number="59",value="0x0"@},@{number="60",value="0x0"@}, @{number="61",value="0x0"@},@{number="62",value="0x0"@}, @{number="63",value="0x0"@},@{number="64",value="0xfe00a300"@}, @{number="65",value="0x29002"@},@{number="66",value="0x202f04b5"@}, @{number="67",value="0xfe0043b0"@},@{number="68",value="0xfe00b3e4"@}, @{number="69",value="0x20002b03"@}@} (@value{GDBP}) @end smallexample @subheading The @code{-data-read-memory} Command @findex -data-read-memory @subsubheading Synopsis @example -data-read-memory [ -o @var{byte-offset} ] @var{address} @var{word-format} @var{word-size} @var{nr-rows} @var{nr-cols} [ @var{aschar} ] @end example @noindent where: @table @samp @item @var{address} An expression specifying the address of the first memory word to be read. Complex expressions containing embedded white space should be quoted using the C convention. @item @var{word-format} The format to be used to print the memory words. The notation is the same as for @value{GDBN}'s @code{print} command (@pxref{Output Formats, ,Output formats}). @item @var{word-size} The size of each memory word in bytes. @item @var{nr-rows} The number of rows in the output table. @item @var{nr-cols} The number of columns in the output table. @item @var{aschar} If present, indicates that each row should include an @sc{ascii} dump. The value of @var{aschar} is used as a padding character when a byte is not a member of the printable @sc{ascii} character set (printable @sc{ascii} characters are those whose code is between 32 and 126, inclusively). @item @var{byte-offset} An offset to add to the @var{address} before fetching memory. @end table This command displays memory contents as a table of @var{nr-rows} by @var{nr-cols} words, each word being @var{word-size} bytes. In total, @code{@var{nr-rows} * @var{nr-cols} * @var{word-size}} bytes are read (returned as @samp{total-bytes}). Should less then the requested number of bytes be returned by the target, the missing words are identified using @samp{N/A}. The number of bytes read from the target is returned in @samp{nr-bytes} and the starting address used to read memory in @samp{addr}. The address of the next/previous row or page is available in @samp{next-row} and @samp{prev-row}, @samp{next-page} and @samp{prev-page}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{x}. @code{gdbtk} has @samp{gdb_get_mem} memory read command. @subsubheading Example Read six bytes of memory starting at @code{bytes+6} but then offset by @code{-6} bytes. Format as three rows of two columns. One byte per word. Display each word in hex. @smallexample (@value{GDBP}) 9-data-read-memory -o -6 -- bytes+6 x 1 3 2 9^done,addr="0x00001390",nr-bytes="6",total-bytes="6", next-row="0x00001396",prev-row="0x0000138e",next-page="0x00001396", prev-page="0x0000138a",memory=@{ @{addr="0x00001390",data=@{"0x00","0x01"@}@}, @{addr="0x00001392",data=@{"0x02","0x03"@}@}, @{addr="0x00001394",data=@{"0x04","0x05"@}@}@} (@value{GDBP}) @end smallexample Read two bytes of memory starting at address @code{shorts + 64} and display as a single word formatted in decimal. @smallexample (@value{GDBP}) 5-data-read-memory shorts+64 d 2 1 1 5^done,addr="0x00001510",nr-bytes="2",total-bytes="2", next-row="0x00001512",prev-row="0x0000150e", next-page="0x00001512",prev-page="0x0000150e",memory=@{ @{addr="0x00001510",data=@{"128"@}@}@} (@value{GDBP}) @end smallexample Read thirty two bytes of memory starting at @code{bytes+16} and format as eight rows of four columns. Include a string encoding with @samp{x} used as the non-printable character. @smallexample (@value{GDBP}) 4-data-read-memory bytes+16 x 1 8 4 x 4^done,addr="0x000013a0",nr-bytes="32",total-bytes="32", next-row="0x000013c0",prev-row="0x0000139c", next-page="0x000013c0",prev-page="0x00001380",memory=@{ @{addr="0x000013a0",data=@{"0x10","0x11","0x12","0x13"@},ascii="xxxx"@}, @{addr="0x000013a4",data=@{"0x14","0x15","0x16","0x17"@},ascii="xxxx"@}, @{addr="0x000013a8",data=@{"0x18","0x19","0x1a","0x1b"@},ascii="xxxx"@}, @{addr="0x000013ac",data=@{"0x1c","0x1d","0x1e","0x1f"@},ascii="xxxx"@}, @{addr="0x000013b0",data=@{"0x20","0x21","0x22","0x23"@},ascii=" !\"#"@}, @{addr="0x000013b4",data=@{"0x24","0x25","0x26","0x27"@},ascii="$%&'"@}, @{addr="0x000013b8",data=@{"0x28","0x29","0x2a","0x2b"@},ascii="()*+"@}, @{addr="0x000013bc",data=@{"0x2c","0x2d","0x2e","0x2f"@},ascii=",-./"@}@} (@value{GDBP}) @end smallexample @subheading The @code{-display-delete} Command @findex -display-delete @subsubheading Synopsis @example -display-delete @var{number} @end example Delete the display @var{number}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{delete display}. @subsubheading Example N.A. @subheading The @code{-display-disable} Command @findex -display-disable @subsubheading Synopsis @example -display-disable @var{number} @end example Disable display @var{number}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{disable display}. @subsubheading Example N.A. @subheading The @code{-display-enable} Command @findex -display-enable @subsubheading Synopsis @example -display-enable @var{number} @end example Enable display @var{number}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{enable display}. @subsubheading Example N.A. @subheading The @code{-display-insert} Command @findex -display-insert @subsubheading Synopsis @example -display-insert @var{expression} @end example Display @var{expression} every time the program stops. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{display}. @subsubheading Example N.A. @subheading The @code{-display-list} Command @findex -display-list @subsubheading Synopsis @example -display-list @end example List the displays. Do not show the current values. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{info display}. @subsubheading Example N.A. @subheading The @code{-environment-cd} Command @findex -environment-cd @subsubheading Synopsis @example -environment-cd @var{pathdir} @end example Set @value{GDBN}'s working directory. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{cd}. @subsubheading Example @smallexample (@value{GDBP}) -environment-cd /kwikemart/marge/ezannoni/flathead-dev/devo/gdb ^done (@value{GDBP}) @end smallexample @subheading The @code{-environment-directory} Command @findex -environment-directory @subsubheading Synopsis @example -environment-directory @var{pathdir} @end example Add directory @var{pathdir} to beginning of search path for source files. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{dir}. @subsubheading Example @smallexample (@value{GDBP}) -environment-directory /kwikemart/marge/ezannoni/flathead-dev/devo/gdb ^done (@value{GDBP}) @end smallexample @subheading The @code{-environment-path} Command @findex -environment-path @subsubheading Synopsis @example -environment-path ( @var{pathdir} )+ @end example Add directories @var{pathdir} to beginning of search path for object files. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{path}. @subsubheading Example @smallexample (@value{GDBP}) -environment-path /kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb ^done (@value{GDBP}) @end smallexample @subheading The @code{-environment-pwd} Command @findex -environment-pwd @subsubheading Synopsis @example -environment-pwd @end example Show the current working directory. @subsubheading @value{GDBN} command The corresponding @value{GDBN} command is @samp{pwd}. @subsubheading Example @smallexample (@value{GDBP}) -environment-pwd ~Working directory /kwikemart/marge/ezannoni/flathead-dev/devo/gdb. ^done (@value{GDBP}) @end smallexample @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Program Control @section @sc{gdb/mi} Program control @subsubheading Program termination As a result of execution, the inferior program can run to completion, if it doesn't encounter any breakpoints. In this case the output will include an exit code, if the program has exited exceptionally. @subsubheading Examples @noindent Program exited normally: @smallexample (@value{GDBP}) -exec-run ^running (@value{GDBP}) x = 55 *stopped,reason="exited-normally" (@value{GDBP}) @end smallexample @noindent Program exited exceptionally: @smallexample (@value{GDBP}) -exec-run ^running (@value{GDBP}) x = 55 *stopped,reason="exited",exit-code="01" (@value{GDBP}) @end smallexample Another way the program can terminate is if it receives a signal such as @code{SIGINT}. In this case, @sc{gdb/mi} displays this: @smallexample (@value{GDBP}) *stopped,reason="exited-signalled",signal-name="SIGINT", signal-meaning="Interrupt" @end smallexample @subheading The @code{-exec-abort} Command @findex -exec-abort @subsubheading Synopsis @example -exec-abort @end example Kill the inferior running program. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{kill}. @subsubheading Example N.A. @subheading The @code{-exec-arguments} Command @findex -exec-arguments @subsubheading Synopsis @example -exec-arguments @var{args} @end example Set the inferior program arguments, to be used in the next @samp{-exec-run}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{set args}. @subsubheading Example @c FIXME! Don't have one around. @subheading The @code{-exec-continue} Command @findex -exec-continue @subsubheading Synopsis @example -exec-continue @end example Asynchronous command. Resumes the execution of the inferior program until a breakpoint is encountered, or until the inferior exits. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} corresponding is @samp{continue}. @subsubheading Example @smallexample -exec-continue ^running (@value{GDBP}) @@Hello world *stopped,reason="breakpoint-hit",bkptno="2",frame=@{func="foo",args=@{@}, file="hello.c",line="13"@} (@value{GDBP}) @end smallexample @subheading The @code{-exec-finish} Command @findex -exec-finish @subsubheading Synopsis @example -exec-finish @end example Asynchronous command. Resumes the execution of the inferior program until the current function is exited. Displays the results returned by the function. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{finish}. @subsubheading Example Function returning @code{void}. @smallexample -exec-finish ^running (@value{GDBP}) @@hello from foo *stopped,reason="function-finished",frame=@{func="main",args=@{@}, file="hello.c",line="7"@} (@value{GDBP}) @end smallexample Function returning other than @code{void}. The name of the internal @value{GDBN} variable storing the result is printed, together with the value itself. @smallexample -exec-finish ^running (@value{GDBP}) *stopped,reason="function-finished",frame=@{addr="0x000107b0",func="foo", args=@{@{name="a",value="1"@},@{name="b",value="9"@}@}, file="recursive2.c",line="14"@}, gdb-result-var="$1",return-value="0" (@value{GDBP}) @end smallexample @subheading The @code{-exec-interrupt} Command @findex -exec-interrupt @subsubheading Synopsis @example -exec-interrupt @end example Asynchronous command. Interrupts the background execution of the target. Note how the token associated with the stop message is the one for the execution command that has been interrupted. The token for the interrupt itself only appears in the @samp{^done} output. If the user is trying to interrupt a non-running program, an error message will be printed. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{interrupt}. @subsubheading Example @smallexample (@value{GDBP}) 111-exec-continue 111^running (@value{GDBP}) 222-exec-interrupt 222^done (@value{GDBP}) 111*stopped,signal-name="SIGINT",signal-meaning="Interrupt", frame=@{addr="0x00010140",func="foo",args=@{@},file="try.c",line="13"@} (@value{GDBP}) (@value{GDBP}) -exec-interrupt ^error,msg="mi_cmd_exec_interrupt: Inferior not executing." (@value{GDBP}) @end smallexample @subheading The @code{-exec-next} Command @findex -exec-next @subsubheading Synopsis @example -exec-next @end example Asynchronous command. Resumes execution of the inferior program, stopping when the beginning of the next source line is reached. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{next}. @subsubheading Example @smallexample -exec-next ^running (@value{GDBP}) *stopped,reason="end-stepping-range",line="8",file="hello.c" (@value{GDBP}) @end smallexample @subheading The @code{-exec-next-instruction} Command @findex -exec-next-instruction @subsubheading Synopsis @example -exec-next-instruction @end example Asynchronous command. Executes one machine instruction. If the instruction is a function call continues until the function returns. If the program stops at an instruction in the middle of a source line, the address will be printed as well. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{nexti}. @subsubheading Example @smallexample (@value{GDBP}) -exec-next-instruction ^running (@value{GDBP}) *stopped,reason="end-stepping-range", addr="0x000100d4",line="5",file="hello.c" (@value{GDBP}) @end smallexample @subheading The @code{-exec-return} Command @findex -exec-return @subsubheading Synopsis @example -exec-return @end example Makes current function return immediately. Doesn't execute the inferior. Displays the new current frame. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{return}. @subsubheading Example @smallexample (@value{GDBP}) 200-break-insert callee4 200^done,bkpt=@{number="1",addr="0x00010734", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="8"@} (@value{GDBP}) 000-exec-run 000^running (@value{GDBP}) 000*stopped,reason="breakpoint-hit",bkptno="1", frame=@{func="callee4",args=@{@}, file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="8"@} (@value{GDBP}) 205-break-delete 205^done (@value{GDBP}) 111-exec-return 111^done,frame=@{level="0 ",func="callee3", args=@{@{name="strarg", value="0x11940 \"A string argument.\""@}@}, file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="18"@} (@value{GDBP}) @end smallexample @subheading The @code{-exec-run} Command @findex -exec-run @subsubheading Synopsis @example -exec-run @end example Asynchronous command. Starts execution of the inferior from the beginning. The inferior executes until either a breakpoint is encountered or the program exits. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{run}. @subsubheading Example @smallexample (@value{GDBP}) -break-insert main ^done,bkpt=@{number="1",addr="0x0001072c",file="recursive2.c",line="4"@} (@value{GDBP}) -exec-run ^running (@value{GDBP}) *stopped,reason="breakpoint-hit",bkptno="1", frame=@{func="main",args=@{@},file="recursive2.c",line="4"@} (@value{GDBP}) @end smallexample @subheading The @code{-exec-show-arguments} Command @findex -exec-show-arguments @subsubheading Synopsis @example -exec-show-arguments @end example Print the arguments of the program. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{show args}. @subsubheading Example N.A. @c @subheading -exec-signal @subheading The @code{-exec-step} Command @findex -exec-step @subsubheading Synopsis @example -exec-step @end example Asynchronous command. Resumes execution of the inferior program, stopping when the beginning of the next source line is reached, if the next source line is not a function call. If it is, stop at the first instruction of the called function. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{step}. @subsubheading Example Stepping into a function: @smallexample -exec-step ^running (@value{GDBP}) *stopped,reason="end-stepping-range", frame=@{func="foo",args=@{@{name="a",value="10"@}, @{name="b",value="0"@}@},file="recursive2.c",line="11"@} (@value{GDBP}) @end smallexample Regular stepping: @smallexample -exec-step ^running (@value{GDBP}) *stopped,reason="end-stepping-range",line="14",file="recursive2.c" (@value{GDBP}) @end smallexample @subheading The @code{-exec-step-instruction} Command @findex -exec-step-instruction @subsubheading Synopsis @example -exec-step-instruction @end example Asynchronous command. Resumes the inferior which executes one machine instruction. The output, once @value{GDBN} has stopped, will vary depending on whether we have stopped in the middle of a source line or not. In the former case, the address at which the program stopped will be printed as well. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{stepi}. @subsubheading Example @smallexample (@value{GDBP}) -exec-step-instruction ^running (@value{GDBP}) *stopped,reason="end-stepping-range", frame=@{func="foo",args=@{@},file="try.c",line="10"@} (@value{GDBP}) -exec-step-instruction ^running (@value{GDBP}) *stopped,reason="end-stepping-range", frame=@{addr="0x000100f4",func="foo",args=@{@},file="try.c",line="10"@} (@value{GDBP}) @end smallexample @subheading The @code{-exec-until} Command @findex -exec-until @subsubheading Synopsis @example -exec-until [ @var{location} ] @end example Asynchronous command. Executes the inferior until the @var{location} specified in the argument is reached. If there is no argument, the inferior executes until a source line greater than the current one is reached. The reason for stopping in this case will be @samp{location-reached}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{until}. @subsubheading Example @smallexample (@value{GDBP}) -exec-until recursive2.c:6 ^running (@value{GDBP}) x = 55 *stopped,reason="location-reached",frame=@{func="main",args=@{@}, file="recursive2.c",line="6"@} (@value{GDBP}) @end smallexample @ignore @subheading -file-clear Is this going away???? @end ignore @subheading The @code{-file-exec-and-symbols} Command @findex -file-exec-and-symbols @subsubheading Synopsis @example -file-exec-and-symbols @var{file} @end example Specify the executable file to be debugged. This file is the one from which the symbol table is also read. If no file is specified, the command clears the executable and symbol information. If breakpoints are set when using this command with no arguments, @value{GDBN} will produce error messages. Otherwise, no output is produced, except a completion notification. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{file}. @subsubheading Example @smallexample (@value{GDBP}) -file-exec-and-symbols /kwikemart/marge/ezannoni/TRUNK/mbx/hello.mbx ^done (@value{GDBP}) @end smallexample @subheading The @code{-file-exec-file} Command @findex -file-exec-file @subsubheading Synopsis @example -file-exec-file @var{file} @end example Specify the executable file to be debugged. Unlike @samp{-file-exec-and-symbols}, the symbol table is @emph{not} read from this file. If used without argument, @value{GDBN} clears the information about the executable file. No output is produced, except a completion notification. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{exec-file}. @subsubheading Example @smallexample (@value{GDBP}) -file-exec-file /kwikemart/marge/ezannoni/TRUNK/mbx/hello.mbx ^done (@value{GDBP}) @end smallexample @subheading The @code{-file-list-exec-sections} Command @findex -file-list-exec-sections @subsubheading Synopsis @example -file-list-exec-sections @end example List the sections of the current executable file. @subsubheading @value{GDBN} Command The @value{GDBN} command @samp{info file} shows, among the rest, the same information as this command. @code{gdbtk} has a corresponding command @samp{gdb_load_info}. @subsubheading Example N.A. @subheading The @code{-file-list-exec-source-files} Command @findex -file-list-exec-source-files @subsubheading Synopsis @example -file-list-exec-source-files @end example List the source files for the current executable. @subsubheading @value{GDBN} Command There's no @value{GDBN} command which directly corresponds to this one. @code{gdbtk} has an analogous command @samp{gdb_listfiles}. @subsubheading Example N.A. @subheading The @code{-file-list-shared-libraries} Command @findex -file-list-shared-libraries @subsubheading Synopsis @example -file-list-shared-libraries @end example List the shared libraries in the program. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{info shared}. @subsubheading Example N.A. @subheading The @code{-file-list-symbol-files} Command @findex -file-list-symbol-files @subsubheading Synopsis @example -file-list-symbol-files @end example List symbol files. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{info file} (part of it). @subsubheading Example N.A. @subheading The @code{-file-symbol-file} Command @findex -file-symbol-file @subsubheading Synopsis @example -file-symbol-file @var{file} @end example Read symbol table info from the specified @var{file} argument. When used without arguments, clears @value{GDBN}'s symbol table info. No output is produced, except for a completion notification. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{symbol-file}. @subsubheading Example @smallexample (@value{GDBP}) -file-symbol-file /kwikemart/marge/ezannoni/TRUNK/mbx/hello.mbx ^done (@value{GDBP}) @end smallexample @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Miscellaneous Commands @section Miscellaneous @value{GDBN} commands in @sc{gdb/mi} @c @subheading -gdb-complete @subheading The @code{-gdb-exit} Command @findex -gdb-exit @subsubheading Synopsis @example -gdb-exit @end example Exit @value{GDBN} immediately. @subsubheading @value{GDBN} Command Approximately corresponds to @samp{quit}. @subsubheading Example @smallexample (@value{GDBP}) -gdb-exit @end smallexample @subheading The @code{-gdb-set} Command @findex -gdb-set @subsubheading Synopsis @example -gdb-set @end example Set an internal @value{GDBN} variable. @c IS THIS A DOLLAR VARIABLE? OR SOMETHING LIKE ANNOTATE ????? @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{set}. @subsubheading Example @smallexample (@value{GDBP}) -gdb-set $foo=3 ^done (@value{GDBP}) @end smallexample @subheading The @code{-gdb-show} Command @findex -gdb-show @subsubheading Synopsis @example -gdb-show @end example Show the current value of a @value{GDBN} variable. @subsubheading @value{GDBN} command The corresponding @value{GDBN} command is @samp{show}. @subsubheading Example @smallexample (@value{GDBP}) -gdb-show annotate ^done,value="0" (@value{GDBP}) @end smallexample @c @subheading -gdb-source @subheading The @code{-gdb-version} Command @findex -gdb-version @subsubheading Synopsis @example -gdb-version @end example Show version information for @value{GDBN}. Used mostly in testing. @subsubheading @value{GDBN} Command There's no equivalent @value{GDBN} command. @value{GDBN} by default shows this information when you start an interactive session. @subsubheading Example @c This example modifies the actual output from GDB to avoid overfull @c box in TeX. @smallexample (@value{GDBP}) -gdb-version ~GNU gdb 5.2.1 ~Copyright 2000 Free Software Foundation, Inc. ~GDB is free software, covered by the GNU General Public License, and ~you are welcome to change it and/or distribute copies of it under ~ certain conditions. ~Type "show copying" to see the conditions. ~There is absolutely no warranty for GDB. Type "show warranty" for ~ details. ~This GDB was configured as "--host=sparc-sun-solaris2.5.1 --target=ppc-eabi". ^done (@value{GDBP}) @end smallexample @ignore @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Kod Commands @section @sc{gdb/mi} Kod Commands The Kod commands are not implemented. @c @subheading -kod-info @c @subheading -kod-list @c @subheading -kod-list-object-types @c @subheading -kod-show @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Memory Overlay Commands @section @sc{gdb/mi} Memory Overlay Commands The memory overlay commands are not implemented. @c @subheading -overlay-auto @c @subheading -overlay-list-mapping-state @c @subheading -overlay-list-overlays @c @subheading -overlay-map @c @subheading -overlay-off @c @subheading -overlay-on @c @subheading -overlay-unmap @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Signal Handling Commands @section @sc{gdb/mi} Signal Handling Commands Signal handling commands are not implemented. @c @subheading -signal-handle @c @subheading -signal-list-handle-actions @c @subheading -signal-list-signal-types @end ignore @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Stack Manipulation @section Stack manipulation commands in @sc{gdb/mi} @subheading The @code{-stack-info-frame} Command @findex -stack-info-frame @subsubheading Synopsis @example -stack-info-frame @end example Get info on the current frame. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{info frame} or @samp{frame} (without arguments). @subsubheading Example N.A. @subheading The @code{-stack-info-depth} Command @findex -stack-info-depth @subsubheading Synopsis @example -stack-info-depth [ @var{max-depth} ] @end example Return the depth of the stack. If the integer argument @var{max-depth} is specified, do not count beyond @var{max-depth} frames. @subsubheading @value{GDBN} Command There's no equivalent @value{GDBN} command. @subsubheading Example For a stack with frame levels 0 through 11: @smallexample (@value{GDBP}) -stack-info-depth ^done,depth="12" (@value{GDBP}) -stack-info-depth 4 ^done,depth="4" (@value{GDBP}) -stack-info-depth 12 ^done,depth="12" (@value{GDBP}) -stack-info-depth 11 ^done,depth="11" (@value{GDBP}) -stack-info-depth 13 ^done,depth="12" (@value{GDBP}) @end smallexample @subheading The @code{-stack-list-arguments} Command @findex -stack-list-arguments @subsubheading Synopsis @example -stack-list-arguments @var{show-values} [ @var{low-frame} @var{high-frame} ] @end example Display a list of the arguments for the frames between @var{low-frame} and @var{high-frame} (inclusive). If @var{low-frame} and @var{high-frame} are not provided, list the arguments for the whole call stack. The @var{show-values} argument must have a value of 0 or 1. A value of 0 means that only the names of the arguments are listed, a value of 1 means that both names and values of the arguments are printed. @subsubheading @value{GDBN} Command @value{GDBN} does not have an equivalent command. @code{gdbtk} has a @samp{gdb_get_args} command which partially overlaps with the functionality of @samp{-stack-list-arguments}. @subsubheading Example @smallexample (@value{GDBP}) -stack-list-frames ^done, stack=@{ frame=@{level="0 ",addr="0x00010734",func="callee4", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="8"@}, frame=@{level="1 ",addr="0x0001076c",func="callee3", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="17"@}, frame=@{level="2 ",addr="0x0001078c",func="callee2", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="22"@}, frame=@{level="3 ",addr="0x000107b4",func="callee1", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="27"@}, frame=@{level="4 ",addr="0x000107e0",func="main", file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="32"@}@} (@value{GDBP}) -stack-list-arguments 0 ^done, stack-args=@{ frame=@{level="0",args=@{@}@}, frame=@{level="1",args=@{name="strarg"@}@}, frame=@{level="2",args=@{name="intarg",name="strarg"@}@}, frame=@{level="3",args=@{name="intarg",name="strarg",name="fltarg"@}@}, frame=@{level="4",args=@{@}@}@} (@value{GDBP}) -stack-list-arguments 1 ^done, stack-args=@{ frame=@{level="0",args=@{@}@}, frame=@{level="1", args=@{@{name="strarg",value="0x11940 \"A string argument.\""@}@}@}, frame=@{level="2",args=@{ @{name="intarg",value="2"@}, @{name="strarg",value="0x11940 \"A string argument.\""@}@}@}, @{frame=@{level="3",args=@{ @{name="intarg",value="2"@}, @{name="strarg",value="0x11940 \"A string argument.\""@}, @{name="fltarg",value="3.5"@}@}@}, frame=@{level="4",args=@{@}@}@} (@value{GDBP}) -stack-list-arguments 0 2 2 ^done,stack-args=@{frame=@{level="2",args=@{name="intarg",name="strarg"@}@}@} (@value{GDBP}) -stack-list-arguments 1 2 2 ^done,stack-args=@{frame=@{level="2", args=@{@{name="intarg",value="2"@}, @{name="strarg",value="0x11940 \"A string argument.\""@}@}@}@} (@value{GDBP}) @end smallexample @c @subheading -stack-list-exception-handlers @subheading The @code{-stack-list-frames} Command @findex -stack-list-frames @subsubheading Synopsis @example -stack-list-frames [ @var{low-frame} @var{high-frame} ] @end example List the frames currently on the stack. For each frame it displays the following info: @table @samp @item @var{level} The frame number, 0 being the topmost frame, i.e. the innermost function. @item @var{addr} The @code{$pc} value for that frame. @item @var{func} Function name. @item @var{file} File name of the source file where the function lives. @item @var{line} Line number corresponding to the @code{$pc}. @end table If invoked without arguments, this command prints a backtrace for the whole stack. If given two integer arguments, it shows the frames whose levels are between the two arguments (inclusive). If the two arguments are equal, it shows the single frame at the corresponding level. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} commands are @samp{backtrace} and @samp{where}. @subsubheading Example Full stack backtrace: @smallexample (@value{GDBP}) -stack-list-frames ^done,stack= @{frame=@{level="0 ",addr="0x0001076c",func="foo", file="recursive2.c",line="11"@}, frame=@{level="1 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="2 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="3 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="4 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="5 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="6 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="7 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="8 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="9 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="10",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="11",addr="0x00010738",func="main", file="recursive2.c",line="4"@}@} (@value{GDBP}) @end smallexample Show frames between @var{low_frame} and @var{high_frame}: @smallexample (@value{GDBP}) -stack-list-frames 3 5 ^done,stack= @{frame=@{level="3 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="4 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}, frame=@{level="5 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}@} (@value{GDBP}) @end smallexample Show a single frame: @smallexample (@value{GDBP}) -stack-list-frames 3 3 ^done,stack= @{frame=@{level="3 ",addr="0x000107a4",func="foo", file="recursive2.c",line="14"@}@} (@value{GDBP}) @end smallexample @subheading The @code{-stack-list-locals} Command @findex -stack-list-locals @subsubheading Synopsis @example -stack-list-locals @var{print-values} @end example Display the local variable names for the current frame. With an argument of 0 prints only the names of the variables, with argument of 1 prints also their values. @subsubheading @value{GDBN} Command @samp{info locals} in @value{GDBN}, @samp{gdb_get_locals} in @code{gdbtk}. @subsubheading Example @smallexample (@value{GDBP}) -stack-list-locals 0 ^done,locals=@{name="A",name="B",name="C"@} (@value{GDBP}) -stack-list-locals 1 ^done,locals=@{@{name="A",value="1"@},@{name="B",value="2"@}, @{name="C",value="3"@}@} (@value{GDBP}) @end smallexample @subheading The @code{-stack-select-frame} Command @findex -stack-select-frame @subsubheading Synopsis @example -stack-select-frame @var{framenum} @end example Change the current frame. Select a different frame @var{framenum} on the stack. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} commands are @samp{frame}, @samp{up}, @samp{down}, @samp{select-frame}, @samp{up-silent}, and @samp{down-silent}. @subsubheading Example @smallexample (@value{GDBP}) -stack-select-frame 2 ^done (@value{GDBP}) @end smallexample @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Symbol Query @section @sc{gdb/mi} Symbol Query Commands @subheading The @code{-symbol-info-address} Command @findex -symbol-info-address @subsubheading Synopsis @example -symbol-info-address @var{symbol} @end example Describe where @var{symbol} is stored. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{info address}. @subsubheading Example N.A. @subheading The @code{-symbol-info-file} Command @findex -symbol-info-file @subsubheading Synopsis @example -symbol-info-file @end example Show the file for the symbol. @subsubheading @value{GDBN} Command There's no equivalent @value{GDBN} command. @code{gdbtk} has @samp{gdb_find_file}. @subsubheading Example N.A. @subheading The @code{-symbol-info-function} Command @findex -symbol-info-function @subsubheading Synopsis @example -symbol-info-function @end example Show which function the symbol lives in. @subsubheading @value{GDBN} Command @samp{gdb_get_function} in @code{gdbtk}. @subsubheading Example N.A. @subheading The @code{-symbol-info-line} Command @findex -symbol-info-line @subsubheading Synopsis @example -symbol-info-line @end example Show the core addresses of the code for a source line. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} comamnd is @samp{info line}. @code{gdbtk} has the @samp{gdb_get_line} and @samp{gdb_get_file} commands. @subsubheading Example N.A. @subheading The @code{-symbol-info-symbol} Command @findex -symbol-info-symbol @subsubheading Synopsis @example -symbol-info-symbol @var{addr} @end example Describe what symbol is at location @var{addr}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{info symbol}. @subsubheading Example N.A. @subheading The @code{-symbol-list-functions} Command @findex -symbol-list-functions @subsubheading Synopsis @example -symbol-list-functions @end example List the functions in the executable. @subsubheading @value{GDBN} Command @samp{info functions} in @value{GDBN}, @samp{gdb_listfunc} and @samp{gdb_search} in @code{gdbtk}. @subsubheading Example N.A. @subheading The @code{-symbol-list-types} Command @findex -symbol-list-types @subsubheading Synopsis @example -symbol-list-types @end example List all the type names. @subsubheading @value{GDBN} Command The corresponding commands are @samp{info types} in @value{GDBN}, @samp{gdb_search} in @code{gdbtk}. @subsubheading Example N.A. @subheading The @code{-symbol-list-variables} Command @findex -symbol-list-variables @subsubheading Synopsis @example -symbol-list-variables @end example List all the global and static variable names. @subsubheading @value{GDBN} Command @samp{info variables} in @value{GDBN}, @samp{gdb_search} in @code{gdbtk}. @subsubheading Example N.A. @subheading The @code{-symbol-locate} Command @findex -symbol-locate @subsubheading Synopsis @example -symbol-locate @end example @subsubheading @value{GDBN} Command @samp{gdb_loc} in @code{gdbtk}. @subsubheading Example N.A. @subheading The @code{-symbol-type} Command @findex -symbol-type @subsubheading Synopsis @example -symbol-type @var{variable} @end example Show type of @var{variable}. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{ptype}, @code{gdbtk} has @samp{gdb_obj_variable}. @subsubheading Example N.A. @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Target Manipulation @section @sc{gdb/mi} Target Manipulation Commands @subheading The @code{-target-attach} Command @findex -target-attach @subsubheading Synopsis @example -target-attach @var{pid} | @var{file} @end example Attach to a process @var{pid} or a file @var{file} outside of @value{GDBN}. @subsubheading @value{GDBN} command The corresponding @value{GDBN} command is @samp{attach}. @subsubheading Example N.A. @subheading The @code{-target-compare-sections} Command @findex -target-compare-sections @subsubheading Synopsis @example -target-compare-sections [ @var{section} ] @end example Compare data of section @var{section} on target to the exec file. Without the argument, all sections are compared. @subsubheading @value{GDBN} Command The @value{GDBN} equivalent is @samp{compare-sections}. @subsubheading Example N.A. @subheading The @code{-target-detach} Command @findex -target-detach @subsubheading Synopsis @example -target-detach @end example Disconnect from the remote target. There's no output. @subsubheading @value{GDBN} command The corresponding @value{GDBN} command is @samp{detach}. @subsubheading Example @smallexample (@value{GDBP}) -target-detach ^done (@value{GDBP}) @end smallexample @subheading The @code{-target-download} Command @findex -target-download @subsubheading Synopsis @example -target-download @end example Loads the executable onto the remote target. It prints out an update message every half second, which includes the fields: @table @samp @item section The name of the section. @item section-sent The size of what has been sent so far for that section. @item section-size The size of the section. @item total-sent The total size of what was sent so far (the current and the previous sections). @item total-size The size of the overall executable to download. @end table @noindent Each message is sent as status record (@pxref{GDB/MI Output Syntax, , @sc{gdb/mi} Output Syntax}). In addition, it prints the name and size of the sections, as they are downloaded. These messages include the following fields: @table @samp @item section The name of the section. @item section-size The size of the section. @item total-size The size of the overall executable to download. @end table @noindent At the end, a summary is printed. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{load}. @subsubheading Example Note: each status message appears on a single line. Here the messages have been broken down so that they can fit onto a page. @smallexample (@value{GDBP}) -target-download +download,@{section=".text",section-size="6668",total-size="9880"@} +download,@{section=".text",section-sent="512",section-size="6668", total-sent="512",total-size="9880"@} +download,@{section=".text",section-sent="1024",section-size="6668", total-sent="1024",total-size="9880"@} +download,@{section=".text",section-sent="1536",section-size="6668", total-sent="1536",total-size="9880"@} +download,@{section=".text",section-sent="2048",section-size="6668", total-sent="2048",total-size="9880"@} +download,@{section=".text",section-sent="2560",section-size="6668", total-sent="2560",total-size="9880"@} +download,@{section=".text",section-sent="3072",section-size="6668", total-sent="3072",total-size="9880"@} +download,@{section=".text",section-sent="3584",section-size="6668", total-sent="3584",total-size="9880"@} +download,@{section=".text",section-sent="4096",section-size="6668", total-sent="4096",total-size="9880"@} +download,@{section=".text",section-sent="4608",section-size="6668", total-sent="4608",total-size="9880"@} +download,@{section=".text",section-sent="5120",section-size="6668", total-sent="5120",total-size="9880"@} +download,@{section=".text",section-sent="5632",section-size="6668", total-sent="5632",total-size="9880"@} +download,@{section=".text",section-sent="6144",section-size="6668", total-sent="6144",total-size="9880"@} +download,@{section=".text",section-sent="6656",section-size="6668", total-sent="6656",total-size="9880"@} +download,@{section=".init",section-size="28",total-size="9880"@} +download,@{section=".fini",section-size="28",total-size="9880"@} +download,@{section=".data",section-size="3156",total-size="9880"@} +download,@{section=".data",section-sent="512",section-size="3156", total-sent="7236",total-size="9880"@} +download,@{section=".data",section-sent="1024",section-size="3156", total-sent="7748",total-size="9880"@} +download,@{section=".data",section-sent="1536",section-size="3156", total-sent="8260",total-size="9880"@} +download,@{section=".data",section-sent="2048",section-size="3156", total-sent="8772",total-size="9880"@} +download,@{section=".data",section-sent="2560",section-size="3156", total-sent="9284",total-size="9880"@} +download,@{section=".data",section-sent="3072",section-size="3156", total-sent="9796",total-size="9880"@} ^done,address="0x10004",load-size="9880",transfer-rate="6586", write-rate="429" (@value{GDBP}) @end smallexample @subheading The @code{-target-exec-status} Command @findex -target-exec-status @subsubheading Synopsis @example -target-exec-status @end example Provide information on the state of the target (whether it is running or not, for instance). @subsubheading @value{GDBN} Command There's no equivalent @value{GDBN} command. @subsubheading Example N.A. @subheading The @code{-target-list-available-targets} Command @findex -target-list-available-targets @subsubheading Synopsis @example -target-list-available-targets @end example List the possible targets to connect to. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{help target}. @subsubheading Example N.A. @subheading The @code{-target-list-current-targets} Command @findex -target-list-current-targets @subsubheading Synopsis @example -target-list-current-targets @end example Describe the current target. @subsubheading @value{GDBN} Command The corresponding information is printed by @samp{info file} (among other things). @subsubheading Example N.A. @subheading The @code{-target-list-parameters} Command @findex -target-list-parameters @subsubheading Synopsis @example -target-list-parameters @end example @c ???? @subsubheading @value{GDBN} Command No equivalent. @subsubheading Example N.A. @subheading The @code{-target-select} Command @findex -target-select @subsubheading Synopsis @example -target-select @var{type} @var{parameters @dots{}} @end example Connect @value{GDBN} to the remote target. This command takes two args: @table @samp @item @var{type} The type of target, for instance @samp{async}, @samp{remote}, etc. @item @var{parameters} Device names, host names and the like. @xref{Target Commands, , Commands for managing targets}, for more details. @end table The output is a connection notification, followed by the address at which the target program is, in the following form: @smallexample ^connected,addr="@var{address}",func="@var{function name}", args=@{@var{arg list}@} @end smallexample @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{target}. @subsubheading Example @smallexample (@value{GDBP}) -target-select async /dev/ttya ^connected,addr="0xfe00a300",func="??",args=@{@} (@value{GDBP}) @end smallexample @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Thread Commands @section @sc{gdb/mi} Thread Commands @subheading The @code{-thread-info} Command @findex -thread-info @subsubheading Synopsis @example -thread-info @end example @subsubheading @value{GDBN} command No equivalent. @subsubheading Example N.A. @subheading The @code{-thread-list-all-threads} Command @findex -thread-list-all-threads @subsubheading Synopsis @example -thread-list-all-threads @end example @subsubheading @value{GDBN} Command The equivalent @value{GDBN} command is @samp{info threads}. @subsubheading Example N.A. @subheading The @code{-thread-list-ids} Command @findex -thread-list-ids @subsubheading Synopsis @example -thread-list-ids @end example Produces a list of the currently known @value{GDBN} thread ids. At the end of the list it also prints the total number of such threads. @subsubheading @value{GDBN} Command Part of @samp{info threads} supplies the same information. @subsubheading Example No threads present, besides the main process: @smallexample (@value{GDBP}) -thread-list-ids ^done,thread-ids=@{@},number-of-threads="0" (@value{GDBP}) @end smallexample Several threads: @smallexample (@value{GDBP}) -thread-list-ids ^done,thread-ids=@{thread-id="3",thread-id="2",thread-id="1"@}, number-of-threads="3" (@value{GDBP}) @end smallexample @subheading The @code{-thread-select} Command @findex -thread-select @subsubheading Synopsis @example -thread-select @var{threadnum} @end example Make @var{threadnum} the current thread. It prints the number of the new current thread, and the topmost frame for that thread. @subsubheading @value{GDBN} Command The corresponding @value{GDBN} command is @samp{thread}. @subsubheading Example @smallexample (@value{GDBP}) -exec-next ^running (@value{GDBP}) *stopped,reason="end-stepping-range",thread-id="2",line="187", file="../../../devo/gdb/testsuite/gdb.threads/linux-dp.c" (@value{GDBP}) -thread-list-ids ^done, thread-ids=@{thread-id="3",thread-id="2",thread-id="1"@}, number-of-threads="3" (@value{GDBP}) -thread-select 3 ^done,new-thread-id="3", frame=@{level="0 ",func="vprintf", args=@{@{name="format",value="0x8048e9c \"%*s%c %d %c\\n\""@}, @{name="arg",value="0x2"@}@},file="vprintf.c",line="31"@} (@value{GDBP}) @end smallexample @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Tracepoint Commands @section @sc{gdb/mi} Tracepoint Commands The tracepoint commands are not yet implemented. @c @subheading -trace-actions @c @subheading -trace-delete @c @subheading -trace-disable @c @subheading -trace-dump @c @subheading -trace-enable @c @subheading -trace-exists @c @subheading -trace-find @c @subheading -trace-frame-number @c @subheading -trace-info @c @subheading -trace-insert @c @subheading -trace-list @c @subheading -trace-pass-count @c @subheading -trace-save @c @subheading -trace-start @c @subheading -trace-stop @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Variable Objects @section @sc{gdb/mi} Variable Objects @subheading Motivation for Variable Objects in @sc{gdb/mi} For the implementation of a variable debugger window (locals, watched expressions, etc.), we are proposing the adaptation of the existing code used by @code{Insight}. The two main reasons for that are: @enumerate 1 @item It has been proven in practice (it is already on its second generation). @item It will shorten development time (needless to say how important it is now). @end enumerate The original interface was designed to be used by Tcl code, so it was slightly changed so it could be used through @sc{gdb/mi}. This section describes the @sc{gdb/mi} operations that will be available and gives some hints about their use. @emph{Note}: In addition to the set of operations described here, we expect the @sc{gui} implementation of a variable window to require, at least, the following operations: @itemize @bullet @item @code{-gdb-show} @code{output-radix} @item @code{-stack-list-arguments} @item @code{-stack-list-locals} @item @code{-stack-select-frame} @end itemize @subheading Introduction to Variable Objects in @sc{gdb/mi} @cindex variable objects in @sc{gdb/mi} The basic idea behind variable objects is the creation of a named object to represent a variable, an expression, a memory location or even a CPU register. For each object created, a set of operations is available for examining or changing its properties. Furthermore, complex data types, such as C structures, are represented in a tree format. For instance, the @code{struct} type variable is the root and the children will represent the struct members. If a child is itself of a complex type, it will also have children of its own. Appropriate language differences are handled for C, C@t{++} and Java. When returning the actual values of the objects, this facility allows for the individual selection of the display format used in the result creation. It can be chosen among: binary, decimal, hexadecimal, octal and natural. Natural refers to a default format automatically chosen based on the variable type (like decimal for an @code{int}, hex for pointers, etc.). The following is the complete set of @sc{gdb/mi} operations defined to access this functionality: @multitable @columnfractions .4 .6 @item @strong{Operation} @tab @strong{Description} @item @code{-var-create} @tab create a variable object @item @code{-var-delete} @tab delete the variable object and its children @item @code{-var-set-format} @tab set the display format of this variable @item @code{-var-show-format} @tab show the display format of this variable @item @code{-var-info-num-children} @tab tells how many children this object has @item @code{-var-list-children} @tab return a list of the object's children @item @code{-var-info-type} @tab show the type of this variable object @item @code{-var-info-expression} @tab print what this variable object represents @item @code{-var-show-attributes} @tab is this variable editable? does it exist here? @item @code{-var-evaluate-expression} @tab get the value of this variable @item @code{-var-assign} @tab set the value of this variable @item @code{-var-update} @tab update the variable and its children @end multitable In the next subsection we describe each operation in detail and suggest how it can be used. @subheading Description And Use of Operations on Variable Objects @subheading The @code{-var-create} Command @findex -var-create @subsubheading Synopsis @example -var-create @{@var{name} | "-"@} @{@var{frame-addr} | "*"@} @var{expression} @end example This operation creates a variable object, which allows the monitoring of a variable, the result of an expression, a memory cell or a CPU register. The @var{name} parameter is the string by which the object can be referenced. It must be unique. If @samp{-} is specified, the varobj system will generate a string ``varNNNNNN'' automatically. It will be unique provided that one does not specify @var{name} on that format. The command fails if a duplicate name is found. The frame under which the expression should be evaluated can be specified by @var{frame-addr}. A @samp{*} indicates that the current frame should be used. @var{expression} is any expression valid on the current language set (must not begin with a @samp{*}), or one of the following: @itemize @bullet @item @samp{*@var{addr}}, where @var{addr} is the address of a memory cell @item @samp{*@var{addr}-@var{addr}} --- a memory address range (TBD) @item @samp{$@var{regname}} --- a CPU register name @end itemize @subsubheading Result This operation returns the name, number of children and the type of the object created. Type is returned as a string as the ones generated by the @value{GDBN} CLI: @example name="@var{name}",numchild="N",type="@var{type}" @end example @subheading The @code{-var-delete} Command @findex -var-delete @subsubheading Synopsis @example -var-delete @var{name} @end example Deletes a previously created variable object and all of its children. Returns an error if the object @var{name} is not found. @subheading The @code{-var-set-format} Command @findex -var-set-format @subsubheading Synopsis @example -var-set-format @var{name} @var{format-spec} @end example Sets the output format for the value of the object @var{name} to be @var{format-spec}. The syntax for the @var{format-spec} is as follows: @example @var{format-spec} @expansion{} @{binary | decimal | hexadecimal | octal | natural@} @end example @subheading The @code{-var-show-format} Command @findex -var-show-format @subsubheading Synopsis @example -var-show-format @var{name} @end example Returns the format used to display the value of the object @var{name}. @example @var{format} @expansion{} @var{format-spec} @end example @subheading The @code{-var-info-num-children} Command @findex -var-info-num-children @subsubheading Synopsis @example -var-info-num-children @var{name} @end example Returns the number of children of a variable object @var{name}: @example numchild=@var{n} @end example @subheading The @code{-var-list-children} Command @findex -var-list-children @subsubheading Synopsis @example -var-list-children @var{name} @end example Returns a list of the children of the specified variable object: @example numchild=@var{n},children=@{@{name=@var{name}, numchild=@var{n},type=@var{type}@},@r{(repeats N times)}@} @end example @subheading The @code{-var-info-type} Command @findex -var-info-type @subsubheading Synopsis @example -var-info-type @var{name} @end example Returns the type of the specified variable @var{name}. The type is returned as a string in the same format as it is output by the @value{GDBN} CLI: @example type=@var{typename} @end example @subheading The @code{-var-info-expression} Command @findex -var-info-expression @subsubheading Synopsis @example -var-info-expression @var{name} @end example Returns what is represented by the variable object @var{name}: @example lang=@var{lang-spec},exp=@var{expression} @end example @noindent where @var{lang-spec} is @code{@{"C" | "C++" | "Java"@}}. @subheading The @code{-var-show-attributes} Command @findex -var-show-attributes @subsubheading Synopsis @example -var-show-attributes @var{name} @end example List attributes of the specified variable object @var{name}: @example status=@var{attr} [ ( ,@var{attr} )* ] @end example @noindent where @var{attr} is @code{@{ @{ editable | noneditable @} | TBD @}}. @subheading The @code{-var-evaluate-expression} Command @findex -var-evaluate-expression @subsubheading Synopsis @example -var-evaluate-expression @var{name} @end example Evaluates the expression that is represented by the specified variable object and returns its value as a string in the current format specified for the object: @example value=@var{value} @end example @subheading The @code{-var-assign} Command @findex -var-assign @subsubheading Synopsis @example -var-assign @var{name} @var{expression} @end example Assigns the value of @var{expression} to the variable object specified by @var{name}. The object must be @samp{editable}. @subheading The @code{-var-update} Command @findex -var-update @subsubheading Synopsis @example -var-update @{@var{name} | "*"@} @end example Update the value of the variable object @var{name} by evaluating its expression after fetching all the new values from memory or registers. A @samp{*} causes all existing variable objects to be updated. @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Draft Changes to Output Syntax @section @sc{gdb/mi} Draft Changes to Output Syntax @cindex draft changes to output syntax of @sc{gdb/mi} @cindex @sc{gdb/mi}, draft changes to output syntax One problem identified in the existing @sc{gdb/mi} output syntax was the difficulty in differentiating between a tuple such as: @example @{number="1",type="breakpoint",disp="keep",enabled="y"@} @end example where each value has a unique label, and a list such as: @example @{"1","2","4"@} @{bp="1",bp="2",bp="4"@} @end example where values are un-labeled or the label is duplicated. What follows is a draft revision to the output specification that addresses this problem. The output from @sc{gdb/mi} consists of zero or more out-of-band records optionally followed by a single result record, the result record being for the most recent command input. The sequence is terminated by @samp{(@value{GDBP})}. Asynchronous @sc{gdb/mi} output is similar. Each output record directly associated with an input command is prefixed by the input command's @code{@var{token}}. @table @code @item @var{output} @expansion{} @{ @var{out-of-band-record} @} @code{[} @var{result-record} @code{]} "@code{(@value{GDBP})}" @var{nl} @item @var{result-record} @expansion{} @code{[} @var{token} @code{]} "^" @var{result-class} @{ "," @var{result} @} @var{nl} @item @var{out-of-band-record} @expansion{} @var{async-record} @code{|} @var{stream-record} @item @var{async-record} @expansion{} @var{exec-async-output} @code{|} @var{status-async-output} @code{|} @var{notify-async-output} @item @var{exec-async-output} @expansion{} @code{[} @var{token} @code{]} "*" @var{async-output} @item @var{status-async-output} @expansion{} @code{[} @var{token} @code{]} "+" @var{async-output} @item @var{notify-async-output} @expansion{} @code{[} @var{token} @code{]} "=" @var{async-output} @item @var{async-output} @expansion{} @var{async-class} @{ "," @var{result} @} @var{nl} @item @var{result-class} @expansion{} "done" @code{|} "running" @code{|} "connected" @code{|} "error" @code{|} "exit" @item @var{async-class} @expansion{} "stopped" @code{|} @emph{others depending on need as still in development} @item @var{result} @expansion{} @var{string} "=" @var{value} @item @var{value} @expansion{} @var{c-string} @code{|} @var{tupple} @code{|} @var{list} @item @var{tupple} @expansion{} "@{@}" @code{|} "@{" @var{result} @{ "," @var{result} @} "@}" @item @var{list} @expansion{} "@code{[]}" @code{|} "@code{[}" @var{value} @{ "," @var{value} @} "@code{]}" @item @var{string} @expansion{} @emph{[-A-Za-z\.0-9_]*} @item @var{c-string} @expansion{} @emph{See the input specification} @item @var{stream-record} @expansion{} @var{console-stream-output} @code{|} @var{target-stream-output} @code{|} @var{log-stream-output} @item @var{console-stream-output} @expansion{} "~" @var{c-string} @item @var{target-stream-output} @expansion{} "@@" @var{c-string} @item @var{log-stream-output} @expansion{} "&" @var{c-string} @item @var{nl} @expansion{} CR @code{|} CR-LF @item @var{token} @expansion{} "any sequence of digits" @end table In addition, the following are still being developed. @table @code @item @var{query} This action is currently undefined. @end table Notes: @itemize @bullet @item All output sequences end in a single line containing a period. @item The @code{@var{token}} is from the corresponding request. If an execution command is interrupted by the @code{-exec-interrupt} command, the token associated with the `*stopped' message is the one of the original execution command, not the one of the interrupt command. @item @var{status-async-output} contains on-going status information about the progress of a slow operation. It can be discarded. All status output is prefixed by the prefix @samp{+}. @item @var{exec-async-output} contains asynchronous state change on the target (stopped, started, disappeared). All async output is prefixed by the prefix @samp{*}. @item @var{notify-async-output} contains supplementary information that the client should handle (new breakpoint information). All notify output is prefixed by the prefix @samp{=}. @item @var{console-stream-output} is output that should be displayed as is, in the console. It is the textual response to a CLI command. All the console output is prefixed by the prefix @samp{~}. @item @var{target-stream-output} is the output produced by the target program. All the target output is prefixed by the prefix @samp{@@}. @item @var{log-stream-output} is output text coming from @value{GDBN}'s internals, for instance messages that should be displayed as part of an error log. All the log output is prefixed by the prefix @samp{&}. @end itemize @c Local variables: @c change-log-default-name: "ChangeLog-mi" @c End: