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<TITLE>Debugging with GDB: GDB/MI</TITLE>
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<H1> 24. The GDB/MI Interface </H1>
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<H2> Function and Purpose </H2>
<!--docid::SEC243::-->
<P>
<A NAME="IDX1258"></A>
GDB/MI is a line based machine oriented text interface to
GDB and is activated by specifying using the
<SAMP>`--interpreter'</SAMP> command line option (see section <A HREF="gdb_3.html#SEC9">2.1.2 Choosing Modes</A>). It
is specifically intended to support the development of systems which
use the debugger as just one small component of a larger system.
</P><P>
This chapter is a specification of the GDB/MI interface. It is written
in the form of a reference manual.
</P><P>
Note that GDB/MI is still under construction, so some of the
features described below are incomplete and subject to change
(see section <A HREF="gdb_25.html#SEC249">GDB/MI Development and Front Ends</A>).
</P><P>
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<H2> Notation and Terminology </H2>
<!--docid::SEC244::-->
<P>
<A NAME="IDX1259"></A>
This chapter uses the following notation:
</P><P>
<UL>
<LI>
<CODE>|</CODE> separates two alternatives.
<P>
<LI>
<CODE>[ <VAR>something</VAR> ]</CODE> indicates that <VAR>something</VAR> is optional:
it may or may not be given.
<P>
<LI>
<CODE>( <VAR>group</VAR> )*</CODE> means that <VAR>group</VAR> inside the parentheses
may repeat zero or more times.
<P>
<LI>
<CODE>( <VAR>group</VAR> )+</CODE> means that <VAR>group</VAR> inside the parentheses
may repeat one or more times.
<P>
<LI>
<CODE>"<VAR>string</VAR>"</CODE> means a literal <VAR>string</VAR>.
</UL>
<P>
<BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC245">24.1 GDB/MI Command Syntax</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC248">24.2 GDB/MI Compatibility with CLI</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC249">24.3 GDB/MI Development and Front Ends</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC250">24.4 GDB/MI Output Records</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC254">24.5 Simple Examples of GDB/MI Interaction</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC259">24.6 GDB/MI Command Description Format</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC267">24.7 GDB/MI Breakpoint Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC305">24.8 GDB/MI Program Context</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC330">24.9 GDB/MI Thread Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC347">24.10 GDB/MI Program Execution</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC388">24.11 GDB/MI Stack Manipulation Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC413">24.12 GDB/MI Variable Objects</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC449">24.13 GDB/MI Data Manipulation</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC475">24.14 GDB/MI Tracepoint Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC476">24.15 GDB/MI Symbol Query Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC521">24.16 GDB/MI File Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC554">24.17 GDB/MI Target Manipulation Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC595">24.18 GDB/MI File Transfer Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC608">24.19 Miscellaneous GDB/MI Commands</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
</TABLE></BLOCKQUOTE>
<P>
<A NAME="GDB/MI Command Syntax"></A>
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<H2> 24.1 GDB/MI Command Syntax </H2>
<!--docid::SEC245::-->
<P>
<BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC246">24.1.1 GDB/MI Input Syntax</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC247">24.1.2 GDB/MI Output Syntax</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
</TABLE></BLOCKQUOTE>
<P>
<A NAME="GDB/MI Input Syntax"></A>
<HR SIZE="6">
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</TR></TABLE>
<H3> 24.1.1 GDB/MI Input Syntax </H3>
<!--docid::SEC246::-->
<P>
<A NAME="IDX1260"></A>
<A NAME="IDX1261"></A>
<DL COMPACT>
<DT><CODE><VAR>command</VAR> ==></CODE>
<DD><CODE><VAR>cli-command</VAR> | <VAR>mi-command</VAR></CODE>
<P>
<DT><CODE><VAR>cli-command</VAR> ==></CODE>
<DD><CODE>[ <VAR>token</VAR> ] <VAR>cli-command</VAR> <VAR>nl</VAR></CODE>, where
<VAR>cli-command</VAR> is any existing GDB CLI command.
<P>
<DT><CODE><VAR>mi-command</VAR> ==></CODE>
<DD><CODE>[ <VAR>token</VAR> ] "-" <VAR>operation</VAR> ( " " <VAR>option</VAR> )*
<CODE>[</CODE> " --" <CODE>]</CODE> ( " " <VAR>parameter</VAR> )* <VAR>nl</VAR></CODE>
<P>
<DT><CODE><VAR>token</VAR> ==></CODE>
<DD>"any sequence of digits"
<P>
<DT><CODE><VAR>option</VAR> ==></CODE>
<DD><CODE>"-" <VAR>parameter</VAR> [ " " <VAR>parameter</VAR> ]</CODE>
<P>
<DT><CODE><VAR>parameter</VAR> ==></CODE>
<DD><CODE><VAR>non-blank-sequence</VAR> | <VAR>c-string</VAR></CODE>
<P>
<DT><CODE><VAR>operation</VAR> ==></CODE>
<DD><EM>any of the operations described in this chapter</EM>
<P>
<DT><CODE><VAR>non-blank-sequence</VAR> ==></CODE>
<DD><EM>anything, provided it doesn't contain special characters such as
"-", <VAR>nl</VAR>, """ and of course " "</EM>
<P>
<DT><CODE><VAR>c-string</VAR> ==></CODE>
<DD><CODE>""" <VAR>seven-bit-iso-c-string-content</VAR> """</CODE>
<P>
<DT><CODE><VAR>nl</VAR> ==></CODE>
<DD><CODE>CR | CR-LF</CODE>
</DL>
<P>
Notes:
</P><P>
<UL>
<LI>
The CLI commands are still handled by the MI interpreter; their
output is described below.
<P>
<LI>
The <CODE><VAR>token</VAR></CODE>, when present, is passed back when the command
finishes.
<P>
<LI>
Some MI commands accept optional arguments as part of the parameter
list. Each option is identified by a leading <SAMP>`-'</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>`--'</SAMP> (this is useful when some parameters begin with a dash).
</UL>
<P>
Pragmatics:
</P><P>
<UL>
<LI>
We want easy access to the existing CLI syntax (for debugging).
<P>
<LI>
We want it to be easy to spot a MI operation.
</UL>
<P>
<A NAME="GDB/MI Output Syntax"></A>
<HR SIZE="6">
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</TR></TABLE>
<H3> 24.1.2 GDB/MI Output Syntax </H3>
<!--docid::SEC247::-->
<P>
<A NAME="IDX1262"></A>
<A NAME="IDX1263"></A>
The output from 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>`(gdb)'</SAMP>.
</P><P>
If an input command was prefixed with a <CODE><VAR>token</VAR></CODE> then the
corresponding output for that command will also be prefixed by that same
<VAR>token</VAR>.
</P><P>
<DL COMPACT>
<DT><CODE><VAR>output</VAR> ==></CODE>
<DD><CODE>( <VAR>out-of-band-record</VAR> )* [ <VAR>result-record</VAR> ] "(gdb)" <VAR>nl</VAR></CODE>
<P>
<DT><CODE><VAR>result-record</VAR> ==></CODE>
<DD><CODE> [ <VAR>token</VAR> ] "^" <VAR>result-class</VAR> ( "," <VAR>result</VAR> )* <VAR>nl</VAR></CODE>
<P>
<DT><CODE><VAR>out-of-band-record</VAR> ==></CODE>
<DD><CODE><VAR>async-record</VAR> | <VAR>stream-record</VAR></CODE>
<P>
<DT><CODE><VAR>async-record</VAR> ==></CODE>
<DD><CODE><VAR>exec-async-output</VAR> | <VAR>status-async-output</VAR> | <VAR>notify-async-output</VAR></CODE>
<P>
<DT><CODE><VAR>exec-async-output</VAR> ==></CODE>
<DD><CODE>[ <VAR>token</VAR> ] "*" <VAR>async-output</VAR></CODE>
<P>
<DT><CODE><VAR>status-async-output</VAR> ==></CODE>
<DD><CODE>[ <VAR>token</VAR> ] "+" <VAR>async-output</VAR></CODE>
<P>
<DT><CODE><VAR>notify-async-output</VAR> ==></CODE>
<DD><CODE>[ <VAR>token</VAR> ] "=" <VAR>async-output</VAR></CODE>
<P>
<DT><CODE><VAR>async-output</VAR> ==></CODE>
<DD><CODE><VAR>async-class</VAR> ( "," <VAR>result</VAR> )* <VAR>nl</VAR></CODE>
<P>
<DT><CODE><VAR>result-class</VAR> ==></CODE>
<DD><CODE>"done" | "running" | "connected" | "error" | "exit"</CODE>
<P>
<DT><CODE><VAR>async-class</VAR> ==></CODE>
<DD><CODE>"stopped" | <VAR>others</VAR></CODE> (where <VAR>others</VAR> will be added
depending on the needs--this is still in development).
<P>
<DT><CODE><VAR>result</VAR> ==></CODE>
<DD><CODE> <VAR>variable</VAR> "=" <VAR>value</VAR></CODE>
<P>
<DT><CODE><VAR>variable</VAR> ==></CODE>
<DD><CODE> <VAR>string</VAR> </CODE>
<P>
<DT><CODE><VAR>value</VAR> ==></CODE>
<DD><CODE> <VAR>const</VAR> | <VAR>tuple</VAR> | <VAR>list</VAR> </CODE>
<P>
<DT><CODE><VAR>const</VAR> ==></CODE>
<DD><CODE><VAR>c-string</VAR></CODE>
<P>
<DT><CODE><VAR>tuple</VAR> ==></CODE>
<DD><CODE> "{}" | "{" <VAR>result</VAR> ( "," <VAR>result</VAR> )* "}" </CODE>
<P>
<DT><CODE><VAR>list</VAR> ==></CODE>
<DD><CODE> "[]" | "[" <VAR>value</VAR> ( "," <VAR>value</VAR> )* "]" | "["
<VAR>result</VAR> ( "," <VAR>result</VAR> )* "]" </CODE>
<P>
<DT><CODE><VAR>stream-record</VAR> ==></CODE>
<DD><CODE><VAR>console-stream-output</VAR> | <VAR>target-stream-output</VAR> | <VAR>log-stream-output</VAR></CODE>
<P>
<DT><CODE><VAR>console-stream-output</VAR> ==></CODE>
<DD><CODE>"~" <VAR>c-string</VAR></CODE>
<P>
<DT><CODE><VAR>target-stream-output</VAR> ==></CODE>
<DD><CODE>"@" <VAR>c-string</VAR></CODE>
<P>
<DT><CODE><VAR>log-stream-output</VAR> ==></CODE>
<DD><CODE>"&#38;" <VAR>c-string</VAR></CODE>
<P>
<DT><CODE><VAR>nl</VAR> ==></CODE>
<DD><CODE>CR | CR-LF</CODE>
<P>
<DT><CODE><VAR>token</VAR> ==></CODE>
<DD><EM>any sequence of digits</EM>.
</DL>
<P>
Notes:
</P><P>
<UL>
<LI>
All output sequences end in a single line containing a period.
<P>
<LI>
The <CODE><VAR>token</VAR></CODE> is from the corresponding request. If an execution
command is interrupted by the <SAMP>`-exec-interrupt'</SAMP> command, the
<VAR>token</VAR> associated with the <SAMP>`*stopped'</SAMP> message is the one of the
original execution command, not the one of the interrupt command.
<P>
<LI>
<A NAME="IDX1264"></A>
<VAR>status-async-output</VAR> contains on-going status information about the
progress of a slow operation. It can be discarded. All status output is
prefixed by <SAMP>`+'</SAMP>.
<P>
<LI>
<A NAME="IDX1265"></A>
<VAR>exec-async-output</VAR> contains asynchronous state change on the target
(stopped, started, disappeared). All async output is prefixed by
<SAMP>`*'</SAMP>.
<P>
<LI>
<A NAME="IDX1266"></A>
<VAR>notify-async-output</VAR> contains supplementary information that the
client should handle (e.g., a new breakpoint information). All notify
output is prefixed by <SAMP>`='</SAMP>.
<P>
<LI>
<A NAME="IDX1267"></A>
<VAR>console-stream-output</VAR> 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>`~'</SAMP>.
<P>
<LI>
<A NAME="IDX1268"></A>
<VAR>target-stream-output</VAR> is the output produced by the target program.
All the target output is prefixed by <SAMP>`@'</SAMP>.
<P>
<LI>
<A NAME="IDX1269"></A>
<VAR>log-stream-output</VAR> is output text coming from GDB's internals, for
instance messages that should be displayed as part of an error log. All
the log output is prefixed by <SAMP>`&#38;'</SAMP>.
<P>
<LI>
<A NAME="IDX1270"></A>
New GDB/MI commands should only output <VAR>lists</VAR> containing
<VAR>values</VAR>.
<P>
</UL>
<P>
See section <A HREF="gdb_25.html#SEC252">GDB/MI Stream Records</A>, for more
details about the various output records.
</P><P>
<A NAME="GDB/MI Compatibility with CLI"></A>
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<H2> 24.2 GDB/MI Compatibility with CLI </H2>
<!--docid::SEC248::-->
<P>
<A NAME="IDX1271"></A>
<A NAME="IDX1272"></A>
</P><P>
For the developers convenience CLI commands can be entered directly,
but there may be some unexpected behaviour. For example, commands
that query the user will behave as if the user replied yes, breakpoint
command lists are not executed and some CLI commands, such as
<CODE>if</CODE>, <CODE>when</CODE> and <CODE>define</CODE>, prompt for further input with
<SAMP>`&#62;'</SAMP>, which is not valid MI output.
</P><P>
This feature may be removed at some stage in the future and it is
recommended that front ends use the <CODE>-interpreter-exec</CODE> command
(see <A HREF="gdb_25.html#-interpreter-exec">-interpreter-exec</A>).
</P><P>
<A NAME="GDB/MI Development and Front Ends"></A>
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<H2> 24.3 GDB/MI Development and Front Ends </H2>
<!--docid::SEC249::-->
<P>
The application which takes the MI output and presents the state of the
program being debugged to the user is called a <EM>front end</EM>.
</P><P>
Although GDB/MI is still incomplete, it is currently being used
by a variety of front ends to GDB. This makes it difficult
to introduce new functionality without breaking existing usage. This
section tries to minimize the problems by describing how the protocol
might change.
</P><P>
Some changes in MI need not break a carefully designed front end, and
for these the MI version will remain unchanged. The following is a
list of changes that may occur within one level, so front ends should
parse MI output in a way that can handle them:
</P><P>
<UL>
<LI>
New MI commands may be added.
<P>
<LI>
New fields may be added to the output of any MI command.
<P>
<LI>
The range of values for fields with specified values, e.g.,
<CODE>in_scope</CODE> (see <A HREF="gdb_25.html#-var-update">-var-update</A>) may be extended.
<P>
</UL>
<P>
If the changes are likely to break front ends, the MI version level
will be increased by one. This will allow the front end to parse the
output according to the MI version. Apart from mi0, new versions of
GDB will not support old versions of MI and it will be the
responsibility of the front end to work with the new one.
</P><P>
The best way to avoid unexpected changes in MI that might break your front
end is to make your project known to GDB developers and
follow development on <A HREF="mailto:gdb@sourceware.org">gdb@sourceware.org</A> and
<A HREF="mailto:gdb-patches@sourceware.org">gdb-patches@sourceware.org</A>. There is also the mailing list
<A HREF="mailto:dmi-discuss@lists.freestandards.org">dmi-discuss@lists.freestandards.org</A>, hosted by the Free Standards
Group, which has the aim of creating a more general MI protocol
called Debugger Machine Interface (DMI) that will become a standard
for all debuggers, not just GDB.
<A NAME="IDX1273"></A>
</P><P>
<A NAME="GDB/MI Output Records"></A>
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<H2> 24.4 GDB/MI Output Records </H2>
<!--docid::SEC250::-->
<P>
<BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC251">24.4.1 GDB/MI Result Records</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC252">24.4.2 GDB/MI Stream Records</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
<TR><TD ALIGN="left" VALIGN="TOP"><A HREF="gdb_25.html#SEC253">24.4.3 GDB/MI Out-of-band Records</A></TD><TD>&nbsp;&nbsp;</TD><TD ALIGN="left" VALIGN="TOP"></TD></TR>
</TABLE></BLOCKQUOTE>
<P>
<A NAME="GDB/MI Result Records"></A>
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<H3> 24.4.1 GDB/MI Result Records </H3>
<!--docid::SEC251::-->
<P>
<A NAME="IDX1274"></A>
<A NAME="IDX1275"></A>
In addition to a number of out-of-band notifications, the response to a
GDB/MI command includes one of the following result indications:
</P><P>
<DL COMPACT>
<A NAME="IDX1276"></A>
<DT><CODE>"^done" [ "," <VAR>results</VAR> ]</CODE>
<DD>The synchronous operation was successful, <CODE><VAR>results</VAR></CODE> are the return
values.
<P>
<DT><CODE>"^running"</CODE>
<DD><A NAME="IDX1277"></A>
The asynchronous operation was successfully started. The target is
running.
<P>
<DT><CODE>"^connected"</CODE>
<DD><A NAME="IDX1278"></A>
GDB has connected to a remote target.
<P>
<DT><CODE>"^error" "," <VAR>c-string</VAR></CODE>
<DD><A NAME="IDX1279"></A>
The operation failed. The <CODE><VAR>c-string</VAR></CODE> contains the corresponding
error message.
<P>
<DT><CODE>"^exit"</CODE>
<DD><A NAME="IDX1280"></A>
GDB has terminated.
<P>
</DL>
<P>
<A NAME="GDB/MI Stream Records"></A>
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<H3> 24.4.2 GDB/MI Stream Records </H3>
<!--docid::SEC252::-->
<P>
<A NAME="IDX1281"></A>
<A NAME="IDX1282"></A>
GDB 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 GDB/MI interface using <EM>stream records</EM>.
</P><P>
Each stream record begins with a unique <EM>prefix character</EM> which
identifies its stream (see section <A HREF="gdb_25.html#SEC247">GDB/MI Output Syntax</A>). In addition to the prefix, each stream record contains a
<CODE><VAR>string-output</VAR></CODE>. This is either raw text (with an implicit new
line) or a quoted C string (which does not contain an implicit newline).
</P><P>
<DL COMPACT>
<DT><CODE>"~" <VAR>string-output</VAR></CODE>
<DD>The console output stream contains text that should be displayed in the
CLI console window. It contains the textual responses to CLI commands.
<P>
<DT><CODE>"@" <VAR>string-output</VAR></CODE>
<DD>The target output stream contains any textual output from the running
target. This is only present when GDB's event loop is truly
asynchronous, which is currently only the case for remote targets.
<P>
<DT><CODE>"&#38;" <VAR>string-output</VAR></CODE>
<DD>The log stream contains debugging messages being produced by GDB's
internals.
</DL>
<P>
<A NAME="GDB/MI Out-of-band Records"></A>
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<H3> 24.4.3 GDB/MI Out-of-band Records </H3>
<!--docid::SEC253::-->
<P>
<A NAME="IDX1283"></A>
<A NAME="IDX1284"></A>
<EM>Out-of-band</EM> records are used to notify the GDB/MI client of
additional changes that have occurred. Those changes can either be a
consequence of GDB/MI (e.g., a breakpoint modified) or a result of
target activity (e.g., target stopped).
</P><P>
The following is a preliminary list of possible out-of-band records.
In particular, the <VAR>exec-async-output</VAR> records.
</P><P>
<DL COMPACT>
<DT><CODE>*stopped,reason="<VAR>reason</VAR>"</CODE>
<DD></DL>
<P>
<VAR>reason</VAR> can be one of the following:
</P><P>
<DL COMPACT>
<DT><CODE>breakpoint-hit</CODE>
<DD>A breakpoint was reached.
<DT><CODE>watchpoint-trigger</CODE>
<DD>A watchpoint was triggered.
<DT><CODE>read-watchpoint-trigger</CODE>
<DD>A read watchpoint was triggered.
<DT><CODE>access-watchpoint-trigger</CODE>
<DD>An access watchpoint was triggered.
<DT><CODE>function-finished</CODE>
<DD>An -exec-finish or similar CLI command was accomplished.
<DT><CODE>location-reached</CODE>
<DD>An -exec-until or similar CLI command was accomplished.
<DT><CODE>watchpoint-scope</CODE>
<DD>A watchpoint has gone out of scope.
<DT><CODE>end-stepping-range</CODE>
<DD>An -exec-next, -exec-next-instruction, -exec-step, -exec-step-instruction or
similar CLI command was accomplished.
<DT><CODE>exited-signalled</CODE>
<DD>The inferior exited because of a signal.
<DT><CODE>exited</CODE>
<DD>The inferior exited.
<DT><CODE>exited-normally</CODE>
<DD>The inferior exited normally.
<DT><CODE>signal-received</CODE>
<DD>A signal was received by the inferior.
</DL>
<P>
<A NAME="GDB/MI Simple Examples"></A>
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<H2> 24.5 Simple Examples of GDB/MI Interaction </H2>
<!--docid::SEC254::-->
<P>
This subsection presents several simple examples of interaction using
the GDB/MI interface. In these examples, <SAMP>`-&#62;'</SAMP> means that the
following line is passed to GDB/MI as input, while <SAMP>`&#60;-'</SAMP> means
the output received from GDB/MI.
</P><P>
Note the line breaks shown in the examples are here only for
readability, they don't appear in the real output.
</P><P>
<A NAME="SEC255"></A>
<H3> Setting a Breakpoint </H3>
<!--docid::SEC255::-->
<P>
Setting a breakpoint generates synchronous output which contains detailed
information of the breakpoint.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-&#62; -break-insert main
&#60;- ^done,bkpt={number="1",type="breakpoint",disp="keep",
enabled="y",addr="0x08048564",func="main",file="myprog.c",
fullname="/home/nickrob/myprog.c",line="68",times="0"}
&#60;- (gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC256"></A>
<H3> Program Execution </H3>
<!--docid::SEC256::-->
<P>
Program execution generates asynchronous records and MI gives the
reason that execution stopped.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-&#62; -exec-run
&#60;- ^running
&#60;- (gdb)
&#60;- *stopped,reason="breakpoint-hit",bkptno="1",thread-id="0",
frame={addr="0x08048564",func="main",
args=[{name="argc",value="1"},{name="argv",value="0xbfc4d4d4"}],
file="myprog.c",fullname="/home/nickrob/myprog.c",line="68"}
&#60;- (gdb)
-&#62; -exec-continue
&#60;- ^running
&#60;- (gdb)
&#60;- *stopped,reason="exited-normally"
&#60;- (gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC257"></A>
<H3> Quitting GDB </H3>
<!--docid::SEC257::-->
<P>
Quitting GDB just prints the result class <SAMP>`^exit'</SAMP>.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-&#62; (gdb)
&#60;- -gdb-exit
&#60;- ^exit
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC258"></A>
<H3> A Bad Command </H3>
<!--docid::SEC258::-->
<P>
Here's what happens if you pass a non-existent command:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-&#62; -rubbish
&#60;- ^error,msg="Undefined MI command: rubbish"
&#60;- (gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Command Description Format"></A>
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<H2> 24.6 GDB/MI Command Description Format </H2>
<!--docid::SEC259::-->
<P>
The remaining sections describe blocks of commands. Each block of
commands is laid out in a fashion similar to this section.
</P><P>
<A NAME="SEC260"></A>
<H3> Motivation </H3>
<!--docid::SEC260::-->
<P>
The motivation for this collection of commands.
</P><P>
<A NAME="SEC261"></A>
<H3> Introduction </H3>
<!--docid::SEC261::-->
<P>
A brief introduction to this collection of commands as a whole.
</P><P>
<A NAME="SEC262"></A>
<H3> Commands </H3>
<!--docid::SEC262::-->
<P>
For each command in the block, the following is described:
</P><P>
<A NAME="SEC263"></A>
<H4> Synopsis </H4>
<!--docid::SEC263::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -command <VAR>args</VAR><small>...</small>
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC264"></A>
<H4> Result </H4>
<!--docid::SEC264::-->
<P>
<A NAME="SEC265"></A>
<H4> GDB Command </H4>
<!--docid::SEC265::-->
<P>
The corresponding GDB CLI command(s), if any.
</P><P>
<A NAME="SEC266"></A>
<H4> Example </H4>
<!--docid::SEC266::-->
<P>
Example(s) formatted for readability. Some of the described commands have
not been implemented yet and these are labeled N.A. (not available).
</P><P>
<A NAME="GDB/MI Breakpoint Commands"></A>
<HR SIZE="6">
<A NAME="SEC267"></A>
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<H2> 24.7 GDB/MI Breakpoint Commands </H2>
<!--docid::SEC267::-->
<P>
<A NAME="IDX1285"></A>
<A NAME="IDX1286"></A>
This section documents GDB/MI commands for manipulating
breakpoints.
</P><P>
<A NAME="SEC268"></A>
<H3> The <CODE>-break-after</CODE> Command </H3>
<!--docid::SEC268::-->
<P>
<A NAME="SEC269"></A>
<H4> Synopsis </H4>
<!--docid::SEC269::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-after <VAR>number</VAR> <VAR>count</VAR>
</FONT></pre></td></tr></table></P><P>
The breakpoint number <VAR>number</VAR> is not in effect until it has been
hit <VAR>count</VAR> times. To see how this is reflected in the output of
the <SAMP>`-break-list'</SAMP> command, see the description of the
<SAMP>`-break-list'</SAMP> command below.
</P><P>
<A NAME="SEC270"></A>
<H4> GDB Command </H4>
<!--docid::SEC270::-->
<P>
The corresponding GDB command is <SAMP>`ignore'</SAMP>.
</P><P>
<A NAME="SEC271"></A>
<H4> Example </H4>
<!--docid::SEC271::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-insert main
^done,bkpt={number="1",addr="0x000100d0",file="hello.c",
fullname="/home/foo/hello.c",line="5",times="0"}
(gdb)
-break-after 1 3
~
^done
(gdb)
-break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c",
line="5",times="0",ignore="3"}]}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC272"></A>
<H3> The <CODE>-break-condition</CODE> Command </H3>
<!--docid::SEC272::-->
<P>
<A NAME="SEC273"></A>
<H4> Synopsis </H4>
<!--docid::SEC273::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-condition <VAR>number</VAR> <VAR>expr</VAR>
</FONT></pre></td></tr></table></P><P>
Breakpoint <VAR>number</VAR> will stop the program only if the condition in
<VAR>expr</VAR> is true. The condition becomes part of the
<SAMP>`-break-list'</SAMP> output (see the description of the <SAMP>`-break-list'</SAMP>
command below).
</P><P>
<A NAME="SEC274"></A>
<H4> GDB Command </H4>
<!--docid::SEC274::-->
<P>
The corresponding GDB command is <SAMP>`condition'</SAMP>.
</P><P>
<A NAME="SEC275"></A>
<H4> Example </H4>
<!--docid::SEC275::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-condition 1 1
^done
(gdb)
-break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c",
line="5",cond="1",times="0",ignore="3"}]}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC276"></A>
<H3> The <CODE>-break-delete</CODE> Command </H3>
<!--docid::SEC276::-->
<P>
<A NAME="SEC277"></A>
<H4> Synopsis </H4>
<!--docid::SEC277::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-delete ( <VAR>breakpoint</VAR> )+
</FONT></pre></td></tr></table></P><P>
Delete the breakpoint(s) whose number(s) are specified in the argument
list. This is obviously reflected in the breakpoint list.
</P><P>
<A NAME="SEC278"></A>
<H4> GDB Command </H4>
<!--docid::SEC278::-->
<P>
The corresponding GDB command is <SAMP>`delete'</SAMP>.
</P><P>
<A NAME="SEC279"></A>
<H4> Example </H4>
<!--docid::SEC279::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-delete 1
^done
(gdb)
-break-list
^done,BreakpointTable={nr_rows="0",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[]}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC280"></A>
<H3> The <CODE>-break-disable</CODE> Command </H3>
<!--docid::SEC280::-->
<P>
<A NAME="SEC281"></A>
<H4> Synopsis </H4>
<!--docid::SEC281::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-disable ( <VAR>breakpoint</VAR> )+
</FONT></pre></td></tr></table></P><P>
Disable the named <VAR>breakpoint</VAR>(s). The field <SAMP>`enabled'</SAMP> in the
break list is now set to <SAMP>`n'</SAMP> for the named <VAR>breakpoint</VAR>(s).
</P><P>
<A NAME="SEC282"></A>
<H4> GDB Command </H4>
<!--docid::SEC282::-->
<P>
The corresponding GDB command is <SAMP>`disable'</SAMP>.
</P><P>
<A NAME="SEC283"></A>
<H4> Example </H4>
<!--docid::SEC283::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-disable 2
^done
(gdb)
-break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="2",type="breakpoint",disp="keep",enabled="n",
addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c",
line="5",times="0"}]}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC284"></A>
<H3> The <CODE>-break-enable</CODE> Command </H3>
<!--docid::SEC284::-->
<P>
<A NAME="SEC285"></A>
<H4> Synopsis </H4>
<!--docid::SEC285::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-enable ( <VAR>breakpoint</VAR> )+
</FONT></pre></td></tr></table></P><P>
Enable (previously disabled) <VAR>breakpoint</VAR>(s).
</P><P>
<A NAME="SEC286"></A>
<H4> GDB Command </H4>
<!--docid::SEC286::-->
<P>
The corresponding GDB command is <SAMP>`enable'</SAMP>.
</P><P>
<A NAME="SEC287"></A>
<H4> Example </H4>
<!--docid::SEC287::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-enable 2
^done
(gdb)
-break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="2",type="breakpoint",disp="keep",enabled="y",
addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c",
line="5",times="0"}]}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC288"></A>
<H3> The <CODE>-break-info</CODE> Command </H3>
<!--docid::SEC288::-->
<P>
<A NAME="SEC289"></A>
<H4> Synopsis </H4>
<!--docid::SEC289::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-info <VAR>breakpoint</VAR>
</FONT></pre></td></tr></table></P><P>
Get information about a single breakpoint.
</P><P>
<A NAME="SEC290"></A>
<H4> GDB Command </H4>
<!--docid::SEC290::-->
<P>
The corresponding GDB command is <SAMP>`info break <VAR>breakpoint</VAR>'</SAMP>.
</P><P>
<A NAME="SEC291"></A>
<H4> Example </H4>
<!--docid::SEC291::-->
N.A.
<P>
<A NAME="SEC292"></A>
<H3> The <CODE>-break-insert</CODE> Command </H3>
<!--docid::SEC292::-->
<P>
<A NAME="SEC293"></A>
<H4> Synopsis </H4>
<!--docid::SEC293::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-insert [ -t ] [ -h ] [ -f ]
[ -c <VAR>condition</VAR> ] [ -i <VAR>ignore-count</VAR> ]
[ -p <VAR>thread</VAR> ] [ <VAR>location</VAR> ]
</FONT></pre></td></tr></table></P><P>
If specified, <VAR>location</VAR>, can be one of:
</P><P>
<UL>
<LI>function
<LI>filename:linenum
<LI>filename:function
<LI>*address
</UL>
<P>
The possible optional parameters of this command are:
</P><P>
<DL COMPACT>
<DT><SAMP>`-t'</SAMP>
<DD>Insert a temporary breakpoint.
<DT><SAMP>`-h'</SAMP>
<DD>Insert a hardware breakpoint.
<DT><SAMP>`-c <VAR>condition</VAR>'</SAMP>
<DD>Make the breakpoint conditional on <VAR>condition</VAR>.
<DT><SAMP>`-i <VAR>ignore-count</VAR>'</SAMP>
<DD>Initialize the <VAR>ignore-count</VAR>.
<DT><SAMP>`-f'</SAMP>
<DD>If <VAR>location</VAR> cannot be parsed (for example if it
refers to unknown files or functions), create a pending
breakpoint. Without this flag, GDB will report
an error, and won't create a breakpoint, if <VAR>location</VAR>
cannot be parsed.
</DL>
<P>
<A NAME="SEC294"></A>
<H4> Result </H4>
<!--docid::SEC294::-->
<P>
The result is in the form:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>^done,bkpt={number="<VAR>number</VAR>",type="<VAR>type</VAR>",disp="del"|"keep",
enabled="y"|"n",addr="<VAR>hex</VAR>",func="<VAR>funcname</VAR>",file="<VAR>filename</VAR>",
fullname="<VAR>full_filename</VAR>",line="<VAR>lineno</VAR>",[thread="<VAR>threadno</VAR>,]
times="<VAR>times</VAR>"}
</FONT></pre></td></tr></table></P><P>
where <VAR>number</VAR> is the GDB number for this breakpoint,
<VAR>funcname</VAR> is the name of the function where the breakpoint was
inserted, <VAR>filename</VAR> is the name of the source file which contains
this function, <VAR>lineno</VAR> is the source line number within that file
and <VAR>times</VAR> the number of times that the breakpoint has been hit
(always 0 for -break-insert but may be greater for -break-info or -break-list
which use the same output).
</P><P>
Note: this format is open to change.
</P><P>
<A NAME="SEC295"></A>
<H4> GDB Command </H4>
<!--docid::SEC295::-->
<P>
The corresponding GDB commands are <SAMP>`break'</SAMP>, <SAMP>`tbreak'</SAMP>,
<SAMP>`hbreak'</SAMP>, <SAMP>`thbreak'</SAMP>, and <SAMP>`rbreak'</SAMP>.
</P><P>
<A NAME="SEC296"></A>
<H4> Example </H4>
<!--docid::SEC296::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-insert main
^done,bkpt={number="1",addr="0x0001072c",file="recursive2.c",
fullname="/home/foo/recursive2.c,line="4",times="0"}
(gdb)
-break-insert -t foo
^done,bkpt={number="2",addr="0x00010774",file="recursive2.c",
fullname="/home/foo/recursive2.c,line="11",times="0"}
(gdb)
-break-list
^done,BreakpointTable={nr_rows="2",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x0001072c", func="main",file="recursive2.c",
fullname="/home/foo/recursive2.c,"line="4",times="0"},
bkpt={number="2",type="breakpoint",disp="del",enabled="y",
addr="0x00010774",func="foo",file="recursive2.c",
fullname="/home/foo/recursive2.c",line="11",times="0"}]}
(gdb)
-break-insert -r foo.*
~int foo(int, int);
^done,bkpt={number="3",addr="0x00010774",file="recursive2.c,
"fullname="/home/foo/recursive2.c",line="11",times="0"}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC297"></A>
<H3> The <CODE>-break-list</CODE> Command </H3>
<!--docid::SEC297::-->
<P>
<A NAME="SEC298"></A>
<H4> Synopsis </H4>
<!--docid::SEC298::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-list
</FONT></pre></td></tr></table></P><P>
Displays the list of inserted breakpoints, showing the following fields:
</P><P>
<DL COMPACT>
<DT><SAMP>`Number'</SAMP>
<DD>number of the breakpoint
<DT><SAMP>`Type'</SAMP>
<DD>type of the breakpoint: <SAMP>`breakpoint'</SAMP> or <SAMP>`watchpoint'</SAMP>
<DT><SAMP>`Disposition'</SAMP>
<DD>should the breakpoint be deleted or disabled when it is hit: <SAMP>`keep'</SAMP>
or <SAMP>`nokeep'</SAMP>
<DT><SAMP>`Enabled'</SAMP>
<DD>is the breakpoint enabled or no: <SAMP>`y'</SAMP> or <SAMP>`n'</SAMP>
<DT><SAMP>`Address'</SAMP>
<DD>memory location at which the breakpoint is set
<DT><SAMP>`What'</SAMP>
<DD>logical location of the breakpoint, expressed by function name, file
name, line number
<DT><SAMP>`Times'</SAMP>
<DD>number of times the breakpoint has been hit
</DL>
<P>
If there are no breakpoints or watchpoints, the <CODE>BreakpointTable</CODE>
<CODE>body</CODE> field is an empty list.
</P><P>
<A NAME="SEC299"></A>
<H4> GDB Command </H4>
<!--docid::SEC299::-->
<P>
The corresponding GDB command is <SAMP>`info break'</SAMP>.
</P><P>
<A NAME="SEC300"></A>
<H4> Example </H4>
<!--docid::SEC300::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-list
^done,BreakpointTable={nr_rows="2",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[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",fullname="/home/foo/hello.c",
line="13",times="0"}]}
(gdb)
</FONT></pre></td></tr></table></P><P>
Here's an example of the result when there are no breakpoints:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-list
^done,BreakpointTable={nr_rows="0",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[]}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC301"></A>
<H3> The <CODE>-break-watch</CODE> Command </H3>
<!--docid::SEC301::-->
<P>
<A NAME="SEC302"></A>
<H4> Synopsis </H4>
<!--docid::SEC302::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -break-watch [ -a | -r ]
</FONT></pre></td></tr></table></P><P>
Create a watchpoint. With the <SAMP>`-a'</SAMP> option it will create an
<EM>access</EM> watchpoint, i.e., a watchpoint that triggers either on a
read from or on a write to the memory location. With the <SAMP>`-r'</SAMP>
option, the watchpoint created is a <EM>read</EM> 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.
See section <A HREF="gdb_6.html#SEC34">Setting Watchpoints</A>.
</P><P>
Note that <SAMP>`-break-list'</SAMP> will report a single list of watchpoints and
breakpoints inserted.
</P><P>
<A NAME="SEC303"></A>
<H4> GDB Command </H4>
<!--docid::SEC303::-->
<P>
The corresponding GDB commands are <SAMP>`watch'</SAMP>, <SAMP>`awatch'</SAMP>, and
<SAMP>`rwatch'</SAMP>.
</P><P>
<A NAME="SEC304"></A>
<H4> Example </H4>
<!--docid::SEC304::-->
<P>
Setting a watchpoint on a variable in the <CODE>main</CODE> function:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-watch x
^done,wpt={number="2",exp="x"}
(gdb)
-exec-continue
^running
(gdb)
*stopped,reason="watchpoint-trigger",wpt={number="2",exp="x"},
value={old="-268439212",new="55"},
frame={func="main",args=[],file="recursive2.c",
fullname="/home/foo/bar/recursive2.c",line="5"}
(gdb)
</FONT></pre></td></tr></table></P><P>
Setting a watchpoint on a variable local to a function. GDB will stop
the program execution twice: first for the variable changing value, then
for the watchpoint going out of scope.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-watch C
^done,wpt={number="5",exp="C"}
(gdb)
-exec-continue
^running
(gdb)
*stopped,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",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="13"}
(gdb)
-exec-continue
^running
(gdb)
*stopped,reason="watchpoint-scope",wpnum="5",
frame={func="callee3",args=[{name="strarg",
value="0x11940 \"A string argument.\""}],
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="18"}
(gdb)
</FONT></pre></td></tr></table></P><P>
Listing breakpoints and watchpoints, at different points in the program
execution. Note that once the watchpoint goes out of scope, it is
deleted.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-watch C
^done,wpt={number="2",exp="C"}
(gdb)
-break-list
^done,BreakpointTable={nr_rows="2",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x00010734",func="callee4",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/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"}]}
(gdb)
-exec-continue
^running
(gdb)
*stopped,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",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="13"}
(gdb)
-break-list
^done,BreakpointTable={nr_rows="2",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x00010734",func="callee4",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/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"}]}
(gdb)
-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",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="18"}
(gdb)
-break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",
hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"},
{width="14",alignment="-1",col_name="type",colhdr="Type"},
{width="4",alignment="-1",col_name="disp",colhdr="Disp"},
{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},
{width="10",alignment="-1",col_name="addr",colhdr="Address"},
{width="40",alignment="2",col_name="what",colhdr="What"}],
body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x00010734",func="callee4",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/devo/gdb/testsuite/gdb.mi/basics.c",line="8",
times="1"}]}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Program Context"></A>
<HR SIZE="6">
<A NAME="SEC305"></A>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_abt.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<H2> 24.8 GDB/MI Program Context </H2>
<!--docid::SEC305::-->
<P>
<A NAME="SEC306"></A>
<H3> The <CODE>-exec-arguments</CODE> Command </H3>
<!--docid::SEC306::-->
<P>
<A NAME="SEC307"></A>
<H4> Synopsis </H4>
<!--docid::SEC307::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-arguments <VAR>args</VAR>
</FONT></pre></td></tr></table></P><P>
Set the inferior program arguments, to be used in the next
<SAMP>`-exec-run'</SAMP>.
</P><P>
<A NAME="SEC308"></A>
<H4> GDB Command </H4>
<!--docid::SEC308::-->
<P>
The corresponding GDB command is <SAMP>`set args'</SAMP>.
</P><P>
<A NAME="SEC309"></A>
<H4> Example </H4>
<!--docid::SEC309::-->
<P>
Don't have one around.
</P><P>
<A NAME="SEC310"></A>
<H3> The <CODE>-exec-show-arguments</CODE> Command </H3>
<!--docid::SEC310::-->
<P>
<A NAME="SEC311"></A>
<H4> Synopsis </H4>
<!--docid::SEC311::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-show-arguments
</FONT></pre></td></tr></table></P><P>
Print the arguments of the program.
</P><P>
<A NAME="SEC312"></A>
<H4> GDB Command </H4>
<!--docid::SEC312::-->
<P>
The corresponding GDB command is <SAMP>`show args'</SAMP>.
</P><P>
<A NAME="SEC313"></A>
<H4> Example </H4>
<!--docid::SEC313::-->
N.A.
<P>
<A NAME="SEC314"></A>
<H3> The <CODE>-environment-cd</CODE> Command </H3>
<!--docid::SEC314::-->
<P>
<A NAME="SEC315"></A>
<H4> Synopsis </H4>
<!--docid::SEC315::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -environment-cd <VAR>pathdir</VAR>
</FONT></pre></td></tr></table></P><P>
Set GDB's working directory.
</P><P>
<A NAME="SEC316"></A>
<H4> GDB Command </H4>
<!--docid::SEC316::-->
<P>
The corresponding GDB command is <SAMP>`cd'</SAMP>.
</P><P>
<A NAME="SEC317"></A>
<H4> Example </H4>
<!--docid::SEC317::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-environment-cd /kwikemart/marge/ezannoni/flathead-dev/devo/gdb
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC318"></A>
<H3> The <CODE>-environment-directory</CODE> Command </H3>
<!--docid::SEC318::-->
<P>
<A NAME="SEC319"></A>
<H4> Synopsis </H4>
<!--docid::SEC319::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -environment-directory [ -r ] [ <VAR>pathdir</VAR> ]+
</FONT></pre></td></tr></table></P><P>
Add directories <VAR>pathdir</VAR> to beginning of search path for source files.
If the <SAMP>`-r'</SAMP> option is used, the search path is reset to the default
search path. If directories <VAR>pathdir</VAR> are supplied in addition to the
<SAMP>`-r'</SAMP> option, the search path is first reset and then addition
occurs as normal.
Multiple directories may be specified, separated by blanks. Specifying
multiple directories in a single command
results in the directories added to the beginning of the
search path in the same order they were presented in the command.
If blanks are needed as
part of a directory name, double-quotes should be used around
the name. In the command output, the path will show up separated
by the system directory-separator character. The directory-separator
character must not be used
in any directory name.
If no directories are specified, the current search path is displayed.
</P><P>
<A NAME="SEC320"></A>
<H4> GDB Command </H4>
<!--docid::SEC320::-->
<P>
The corresponding GDB command is <SAMP>`dir'</SAMP>.
</P><P>
<A NAME="SEC321"></A>
<H4> Example </H4>
<!--docid::SEC321::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-environment-directory /kwikemart/marge/ezannoni/flathead-dev/devo/gdb
^done,source-path="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb:$cdir:$cwd"
(gdb)
-environment-directory ""
^done,source-path="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb:$cdir:$cwd"
(gdb)
-environment-directory -r /home/jjohnstn/src/gdb /usr/src
^done,source-path="/home/jjohnstn/src/gdb:/usr/src:$cdir:$cwd"
(gdb)
-environment-directory -r
^done,source-path="$cdir:$cwd"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC322"></A>
<H3> The <CODE>-environment-path</CODE> Command </H3>
<!--docid::SEC322::-->
<P>
<A NAME="SEC323"></A>
<H4> Synopsis </H4>
<!--docid::SEC323::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -environment-path [ -r ] [ <VAR>pathdir</VAR> ]+
</FONT></pre></td></tr></table></P><P>
Add directories <VAR>pathdir</VAR> to beginning of search path for object files.
If the <SAMP>`-r'</SAMP> option is used, the search path is reset to the original
search path that existed at gdb start-up. If directories <VAR>pathdir</VAR> are
supplied in addition to the
<SAMP>`-r'</SAMP> option, the search path is first reset and then addition
occurs as normal.
Multiple directories may be specified, separated by blanks. Specifying
multiple directories in a single command
results in the directories added to the beginning of the
search path in the same order they were presented in the command.
If blanks are needed as
part of a directory name, double-quotes should be used around
the name. In the command output, the path will show up separated
by the system directory-separator character. The directory-separator
character must not be used
in any directory name.
If no directories are specified, the current path is displayed.
</P><P>
<A NAME="SEC324"></A>
<H4> GDB Command </H4>
<!--docid::SEC324::-->
<P>
The corresponding GDB command is <SAMP>`path'</SAMP>.
</P><P>
<A NAME="SEC325"></A>
<H4> Example </H4>
<!--docid::SEC325::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-environment-path
^done,path="/usr/bin"
(gdb)
-environment-path /kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb /bin
^done,path="/kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb:/bin:/usr/bin"
(gdb)
-environment-path -r /usr/local/bin
^done,path="/usr/local/bin:/usr/bin"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC326"></A>
<H3> The <CODE>-environment-pwd</CODE> Command </H3>
<!--docid::SEC326::-->
<P>
<A NAME="SEC327"></A>
<H4> Synopsis </H4>
<!--docid::SEC327::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -environment-pwd
</FONT></pre></td></tr></table></P><P>
Show the current working directory.
</P><P>
<A NAME="SEC328"></A>
<H4> GDB Command </H4>
<!--docid::SEC328::-->
<P>
The corresponding GDB command is <SAMP>`pwd'</SAMP>.
</P><P>
<A NAME="SEC329"></A>
<H4> Example </H4>
<!--docid::SEC329::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-environment-pwd
^done,cwd="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Thread Commands"></A>
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<A NAME="SEC330"></A>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_abt.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<H2> 24.9 GDB/MI Thread Commands </H2>
<!--docid::SEC330::-->
<P>
<A NAME="SEC331"></A>
<H3> The <CODE>-thread-info</CODE> Command </H3>
<!--docid::SEC331::-->
<P>
<A NAME="SEC332"></A>
<H4> Synopsis </H4>
<!--docid::SEC332::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -thread-info
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC333"></A>
<H4> GDB Command </H4>
<!--docid::SEC333::-->
<P>
No equivalent.
</P><P>
<A NAME="SEC334"></A>
<H4> Example </H4>
<!--docid::SEC334::-->
N.A.
<P>
<A NAME="SEC335"></A>
<H3> The <CODE>-thread-list-all-threads</CODE> Command </H3>
<!--docid::SEC335::-->
<P>
<A NAME="SEC336"></A>
<H4> Synopsis </H4>
<!--docid::SEC336::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -thread-list-all-threads
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC337"></A>
<H4> GDB Command </H4>
<!--docid::SEC337::-->
<P>
The equivalent GDB command is <SAMP>`info threads'</SAMP>.
</P><P>
<A NAME="SEC338"></A>
<H4> Example </H4>
<!--docid::SEC338::-->
N.A.
<P>
<A NAME="SEC339"></A>
<H3> The <CODE>-thread-list-ids</CODE> Command </H3>
<!--docid::SEC339::-->
<P>
<A NAME="SEC340"></A>
<H4> Synopsis </H4>
<!--docid::SEC340::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -thread-list-ids
</FONT></pre></td></tr></table></P><P>
Produces a list of the currently known GDB thread ids. At the
end of the list it also prints the total number of such threads.
</P><P>
<A NAME="SEC341"></A>
<H4> GDB Command </H4>
<!--docid::SEC341::-->
<P>
Part of <SAMP>`info threads'</SAMP> supplies the same information.
</P><P>
<A NAME="SEC342"></A>
<H4> Example </H4>
<!--docid::SEC342::-->
<P>
No threads present, besides the main process:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-thread-list-ids
^done,thread-ids={},number-of-threads="0"
(gdb)
</FONT></pre></td></tr></table></P><P>
Several threads:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-thread-list-ids
^done,thread-ids={thread-id="3",thread-id="2",thread-id="1"},
number-of-threads="3"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC343"></A>
<H3> The <CODE>-thread-select</CODE> Command </H3>
<!--docid::SEC343::-->
<P>
<A NAME="SEC344"></A>
<H4> Synopsis </H4>
<!--docid::SEC344::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -thread-select <VAR>threadnum</VAR>
</FONT></pre></td></tr></table></P><P>
Make <VAR>threadnum</VAR> the current thread. It prints the number of the new
current thread, and the topmost frame for that thread.
</P><P>
<A NAME="SEC345"></A>
<H4> GDB Command </H4>
<!--docid::SEC345::-->
<P>
The corresponding GDB command is <SAMP>`thread'</SAMP>.
</P><P>
<A NAME="SEC346"></A>
<H4> Example </H4>
<!--docid::SEC346::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-exec-next
^running
(gdb)
*stopped,reason="end-stepping-range",thread-id="2",line="187",
file="../../../devo/gdb/testsuite/gdb.threads/linux-dp.c"
(gdb)
-thread-list-ids
^done,
thread-ids={thread-id="3",thread-id="2",thread-id="1"},
number-of-threads="3"
(gdb)
-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"}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Program Execution"></A>
<HR SIZE="6">
<A NAME="SEC347"></A>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_toc.html#SEC_Contents">Contents</A>]</TD>
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</TR></TABLE>
<H2> 24.10 GDB/MI Program Execution </H2>
<!--docid::SEC347::-->
<P>
These are the asynchronous commands which generate the out-of-band
record <SAMP>`*stopped'</SAMP>. Currently GDB only really executes
asynchronously with remote targets and this interaction is mimicked in
other cases.
</P><P>
<A NAME="SEC348"></A>
<H3> The <CODE>-exec-continue</CODE> Command </H3>
<!--docid::SEC348::-->
<P>
<A NAME="SEC349"></A>
<H4> Synopsis </H4>
<!--docid::SEC349::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-continue
</FONT></pre></td></tr></table></P><P>
Resumes the execution of the inferior program until a breakpoint is
encountered, or until the inferior exits.
</P><P>
<A NAME="SEC350"></A>
<H4> GDB Command </H4>
<!--docid::SEC350::-->
<P>
The corresponding GDB corresponding is <SAMP>`continue'</SAMP>.
</P><P>
<A NAME="SEC351"></A>
<H4> Example </H4>
<!--docid::SEC351::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-exec-continue
^running
(gdb)
@Hello world
*stopped,reason="breakpoint-hit",bkptno="2",frame={func="foo",args=[],
file="hello.c",fullname="/home/foo/bar/hello.c",line="13"}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC352"></A>
<H3> The <CODE>-exec-finish</CODE> Command </H3>
<!--docid::SEC352::-->
<P>
<A NAME="SEC353"></A>
<H4> Synopsis </H4>
<!--docid::SEC353::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-finish
</FONT></pre></td></tr></table></P><P>
Resumes the execution of the inferior program until the current
function is exited. Displays the results returned by the function.
</P><P>
<A NAME="SEC354"></A>
<H4> GDB Command </H4>
<!--docid::SEC354::-->
<P>
The corresponding GDB command is <SAMP>`finish'</SAMP>.
</P><P>
<A NAME="SEC355"></A>
<H4> Example </H4>
<!--docid::SEC355::-->
<P>
Function returning <CODE>void</CODE>.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-exec-finish
^running
(gdb)
@hello from foo
*stopped,reason="function-finished",frame={func="main",args=[],
file="hello.c",fullname="/home/foo/bar/hello.c",line="7"}
(gdb)
</FONT></pre></td></tr></table></P><P>
Function returning other than <CODE>void</CODE>. The name of the internal
GDB variable storing the result is printed, together with the
value itself.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-exec-finish
^running
(gdb)
*stopped,reason="function-finished",frame={addr="0x000107b0",func="foo",
args=[{name="a",value="1"],{name="b",value="9"}},
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
gdb-result-var="$1",return-value="0"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC356"></A>
<H3> The <CODE>-exec-interrupt</CODE> Command </H3>
<!--docid::SEC356::-->
<P>
<A NAME="SEC357"></A>
<H4> Synopsis </H4>
<!--docid::SEC357::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-interrupt
</FONT></pre></td></tr></table></P><P>
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'</SAMP> output. If the user is trying to
interrupt a non-running program, an error message will be printed.
</P><P>
<A NAME="SEC358"></A>
<H4> GDB Command </H4>
<!--docid::SEC358::-->
<P>
The corresponding GDB command is <SAMP>`interrupt'</SAMP>.
</P><P>
<A NAME="SEC359"></A>
<H4> Example </H4>
<!--docid::SEC359::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
111-exec-continue
111^running
(gdb)
222-exec-interrupt
222^done
(gdb)
111*stopped,signal-name="SIGINT",signal-meaning="Interrupt",
frame={addr="0x00010140",func="foo",args=[],file="try.c",
fullname="/home/foo/bar/try.c",line="13"}
(gdb)
(gdb)
-exec-interrupt
^error,msg="mi_cmd_exec_interrupt: Inferior not executing."
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC360"></A>
<H3> The <CODE>-exec-next</CODE> Command </H3>
<!--docid::SEC360::-->
<P>
<A NAME="SEC361"></A>
<H4> Synopsis </H4>
<!--docid::SEC361::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-next
</FONT></pre></td></tr></table></P><P>
Resumes execution of the inferior program, stopping when the beginning
of the next source line is reached.
</P><P>
<A NAME="SEC362"></A>
<H4> GDB Command </H4>
<!--docid::SEC362::-->
<P>
The corresponding GDB command is <SAMP>`next'</SAMP>.
</P><P>
<A NAME="SEC363"></A>
<H4> Example </H4>
<!--docid::SEC363::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-exec-next
^running
(gdb)
*stopped,reason="end-stepping-range",line="8",file="hello.c"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC364"></A>
<H3> The <CODE>-exec-next-instruction</CODE> Command </H3>
<!--docid::SEC364::-->
<P>
<A NAME="SEC365"></A>
<H4> Synopsis </H4>
<!--docid::SEC365::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-next-instruction
</FONT></pre></td></tr></table></P><P>
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.
</P><P>
<A NAME="SEC366"></A>
<H4> GDB Command </H4>
<!--docid::SEC366::-->
<P>
The corresponding GDB command is <SAMP>`nexti'</SAMP>.
</P><P>
<A NAME="SEC367"></A>
<H4> Example </H4>
<!--docid::SEC367::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-exec-next-instruction
^running
(gdb)
*stopped,reason="end-stepping-range",
addr="0x000100d4",line="5",file="hello.c"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC368"></A>
<H3> The <CODE>-exec-return</CODE> Command </H3>
<!--docid::SEC368::-->
<P>
<A NAME="SEC369"></A>
<H4> Synopsis </H4>
<!--docid::SEC369::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-return
</FONT></pre></td></tr></table></P><P>
Makes current function return immediately. Doesn't execute the inferior.
Displays the new current frame.
</P><P>
<A NAME="SEC370"></A>
<H4> GDB Command </H4>
<!--docid::SEC370::-->
<P>
The corresponding GDB command is <SAMP>`return'</SAMP>.
</P><P>
<A NAME="SEC371"></A>
<H4> Example </H4>
<!--docid::SEC371::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
200-break-insert callee4
200^done,bkpt={number="1",addr="0x00010734",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",line="8"}
(gdb)
000-exec-run
000^running
(gdb)
000*stopped,reason="breakpoint-hit",bkptno="1",
frame={func="callee4",args=[],
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="8"}
(gdb)
205-break-delete
205^done
(gdb)
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",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="18"}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC372"></A>
<H3> The <CODE>-exec-run</CODE> Command </H3>
<!--docid::SEC372::-->
<P>
<A NAME="SEC373"></A>
<H4> Synopsis </H4>
<!--docid::SEC373::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-run
</FONT></pre></td></tr></table></P><P>
Starts execution of the inferior from the beginning. The inferior
executes until either a breakpoint is encountered or the program
exits. In the latter case the output will include an exit code, if
the program has exited exceptionally.
</P><P>
<A NAME="SEC374"></A>
<H4> GDB Command </H4>
<!--docid::SEC374::-->
<P>
The corresponding GDB command is <SAMP>`run'</SAMP>.
</P><P>
<A NAME="SEC375"></A>
<H4> Examples </H4>
<!--docid::SEC375::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-break-insert main
^done,bkpt={number="1",addr="0x0001072c",file="recursive2.c",line="4"}
(gdb)
-exec-run
^running
(gdb)
*stopped,reason="breakpoint-hit",bkptno="1",
frame={func="main",args=[],file="recursive2.c",
fullname="/home/foo/bar/recursive2.c",line="4"}
(gdb)
</FONT></pre></td></tr></table></P><P>
Program exited normally:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-exec-run
^running
(gdb)
x = 55
*stopped,reason="exited-normally"
(gdb)
</FONT></pre></td></tr></table></P><P>
Program exited exceptionally:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-exec-run
^running
(gdb)
x = 55
*stopped,reason="exited",exit-code="01"
(gdb)
</FONT></pre></td></tr></table></P><P>
Another way the program can terminate is if it receives a signal such as
<CODE>SIGINT</CODE>. In this case, GDB/MI displays this:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
*stopped,reason="exited-signalled",signal-name="SIGINT",
signal-meaning="Interrupt"
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC376"></A>
<H3> The <CODE>-exec-step</CODE> Command </H3>
<!--docid::SEC376::-->
<P>
<A NAME="SEC377"></A>
<H4> Synopsis </H4>
<!--docid::SEC377::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-step
</FONT></pre></td></tr></table></P><P>
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.
</P><P>
<A NAME="SEC378"></A>
<H4> GDB Command </H4>
<!--docid::SEC378::-->
<P>
The corresponding GDB command is <SAMP>`step'</SAMP>.
</P><P>
<A NAME="SEC379"></A>
<H4> Example </H4>
<!--docid::SEC379::-->
<P>
Stepping into a function:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-exec-step
^running
(gdb)
*stopped,reason="end-stepping-range",
frame={func="foo",args=[{name="a",value="10"},
{name="b",value="0"}],file="recursive2.c",
fullname="/home/foo/bar/recursive2.c",line="11"}
(gdb)
</FONT></pre></td></tr></table></P><P>
Regular stepping:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-exec-step
^running
(gdb)
*stopped,reason="end-stepping-range",line="14",file="recursive2.c"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC380"></A>
<H3> The <CODE>-exec-step-instruction</CODE> Command </H3>
<!--docid::SEC380::-->
<P>
<A NAME="SEC381"></A>
<H4> Synopsis </H4>
<!--docid::SEC381::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-step-instruction
</FONT></pre></td></tr></table></P><P>
Resumes the inferior which executes one machine instruction. The
output, once GDB 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.
</P><P>
<A NAME="SEC382"></A>
<H4> GDB Command </H4>
<!--docid::SEC382::-->
<P>
The corresponding GDB command is <SAMP>`stepi'</SAMP>.
</P><P>
<A NAME="SEC383"></A>
<H4> Example </H4>
<!--docid::SEC383::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-exec-step-instruction
^running
(gdb)
*stopped,reason="end-stepping-range",
frame={func="foo",args=[],file="try.c",
fullname="/home/foo/bar/try.c",line="10"}
(gdb)
-exec-step-instruction
^running
(gdb)
*stopped,reason="end-stepping-range",
frame={addr="0x000100f4",func="foo",args=[],file="try.c",
fullname="/home/foo/bar/try.c",line="10"}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC384"></A>
<H3> The <CODE>-exec-until</CODE> Command </H3>
<!--docid::SEC384::-->
<P>
<A NAME="SEC385"></A>
<H4> Synopsis </H4>
<!--docid::SEC385::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-until [ <VAR>location</VAR> ]
</FONT></pre></td></tr></table></P><P>
Executes the inferior until the <VAR>location</VAR> 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'</SAMP>.
</P><P>
<A NAME="SEC386"></A>
<H4> GDB Command </H4>
<!--docid::SEC386::-->
<P>
The corresponding GDB command is <SAMP>`until'</SAMP>.
</P><P>
<A NAME="SEC387"></A>
<H4> Example </H4>
<!--docid::SEC387::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-exec-until recursive2.c:6
^running
(gdb)
x = 55
*stopped,reason="location-reached",frame={func="main",args=[],
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="6"}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Stack Manipulation"></A>
<HR SIZE="6">
<A NAME="SEC388"></A>
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</TR></TABLE>
<H2> 24.11 GDB/MI Stack Manipulation Commands </H2>
<!--docid::SEC388::-->
<P>
<A NAME="SEC389"></A>
<H3> The <CODE>-stack-info-frame</CODE> Command </H3>
<!--docid::SEC389::-->
<P>
<A NAME="SEC390"></A>
<H4> Synopsis </H4>
<!--docid::SEC390::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -stack-info-frame
</FONT></pre></td></tr></table></P><P>
Get info on the selected frame.
</P><P>
<A NAME="SEC391"></A>
<H4> GDB Command </H4>
<!--docid::SEC391::-->
<P>
The corresponding GDB command is <SAMP>`info frame'</SAMP> or <SAMP>`frame'</SAMP>
(without arguments).
</P><P>
<A NAME="SEC392"></A>
<H4> Example </H4>
<!--docid::SEC392::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-info-frame
^done,frame={level="1",addr="0x0001076c",func="callee3",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="17"}
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC393"></A>
<H3> The <CODE>-stack-info-depth</CODE> Command </H3>
<!--docid::SEC393::-->
<P>
<A NAME="SEC394"></A>
<H4> Synopsis </H4>
<!--docid::SEC394::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -stack-info-depth [ <VAR>max-depth</VAR> ]
</FONT></pre></td></tr></table></P><P>
Return the depth of the stack. If the integer argument <VAR>max-depth</VAR>
is specified, do not count beyond <VAR>max-depth</VAR> frames.
</P><P>
<A NAME="SEC395"></A>
<H4> GDB Command </H4>
<!--docid::SEC395::-->
<P>
There's no equivalent GDB command.
</P><P>
<A NAME="SEC396"></A>
<H4> Example </H4>
<!--docid::SEC396::-->
<P>
For a stack with frame levels 0 through 11:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-info-depth
^done,depth="12"
(gdb)
-stack-info-depth 4
^done,depth="4"
(gdb)
-stack-info-depth 12
^done,depth="12"
(gdb)
-stack-info-depth 11
^done,depth="11"
(gdb)
-stack-info-depth 13
^done,depth="12"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC397"></A>
<H3> The <CODE>-stack-list-arguments</CODE> Command </H3>
<!--docid::SEC397::-->
<P>
<A NAME="SEC398"></A>
<H4> Synopsis </H4>
<!--docid::SEC398::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -stack-list-arguments <VAR>show-values</VAR>
[ <VAR>low-frame</VAR> <VAR>high-frame</VAR> ]
</FONT></pre></td></tr></table></P><P>
Display a list of the arguments for the frames between <VAR>low-frame</VAR>
and <VAR>high-frame</VAR> (inclusive). If <VAR>low-frame</VAR> and
<VAR>high-frame</VAR> are not provided, list the arguments for the whole
call stack. If the two arguments are equal, show the single frame
at the corresponding level. It is an error if <VAR>low-frame</VAR> is
larger than the actual number of frames. On the other hand,
<VAR>high-frame</VAR> may be larger than the actual number of frames, in
which case only existing frames will be returned.
</P><P>
The <VAR>show-values</VAR> 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.
</P><P>
<A NAME="SEC399"></A>
<H4> GDB Command </H4>
<!--docid::SEC399::-->
<P>
GDB does not have an equivalent command. <CODE>gdbtk</CODE> has a
<SAMP>`gdb_get_args'</SAMP> command which partially overlaps with the
functionality of <SAMP>`-stack-list-arguments'</SAMP>.
</P><P>
<A NAME="SEC400"></A>
<H4> Example </H4>
<!--docid::SEC400::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-list-frames
^done,
stack=[
frame={level="0",addr="0x00010734",func="callee4",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="8"},
frame={level="1",addr="0x0001076c",func="callee3",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="17"},
frame={level="2",addr="0x0001078c",func="callee2",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="22"},
frame={level="3",addr="0x000107b4",func="callee1",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="27"},
frame={level="4",addr="0x000107e0",func="main",
file="../../../devo/gdb/testsuite/gdb.mi/basics.c",
fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="32"}]
(gdb)
-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=[]}]
(gdb)
-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=[]}]
(gdb)
-stack-list-arguments 0 2 2
^done,stack-args=[frame={level="2",args=[name="intarg",name="strarg"]}]
(gdb)
-stack-list-arguments 1 2 2
^done,stack-args=[frame={level="2",
args=[{name="intarg",value="2"},
{name="strarg",value="0x11940 \"A string argument.\""}]}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC401"></A>
<H3> The <CODE>-stack-list-frames</CODE> Command </H3>
<!--docid::SEC401::-->
<P>
<A NAME="SEC402"></A>
<H4> Synopsis </H4>
<!--docid::SEC402::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -stack-list-frames [ <VAR>low-frame</VAR> <VAR>high-frame</VAR> ]
</FONT></pre></td></tr></table></P><P>
List the frames currently on the stack. For each frame it displays the
following info:
</P><P>
<DL COMPACT>
<DT><SAMP>`<VAR>level</VAR>'</SAMP>
<DD>The frame number, 0 being the topmost frame, i.e., the innermost function.
<DT><SAMP>`<VAR>addr</VAR>'</SAMP>
<DD>The <CODE>$pc</CODE> value for that frame.
<DT><SAMP>`<VAR>func</VAR>'</SAMP>
<DD>Function name.
<DT><SAMP>`<VAR>file</VAR>'</SAMP>
<DD>File name of the source file where the function lives.
<DT><SAMP>`<VAR>line</VAR>'</SAMP>
<DD>Line number corresponding to the <CODE>$pc</CODE>.
</DL>
<P>
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. It is
an error if <VAR>low-frame</VAR> is larger than the actual number of
frames. On the other hand, <VAR>high-frame</VAR> may be larger than the
actual number of frames, in which case only existing frames will be returned.
</P><P>
<A NAME="SEC403"></A>
<H4> GDB Command </H4>
<!--docid::SEC403::-->
<P>
The corresponding GDB commands are <SAMP>`backtrace'</SAMP> and <SAMP>`where'</SAMP>.
</P><P>
<A NAME="SEC404"></A>
<H4> Example </H4>
<!--docid::SEC404::-->
<P>
Full stack backtrace:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-list-frames
^done,stack=
[frame={level="0",addr="0x0001076c",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="11"},
frame={level="1",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="2",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="3",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="4",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="5",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="6",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="7",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="8",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="9",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="10",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="11",addr="0x00010738",func="main",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="4"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
Show frames between <VAR>low_frame</VAR> and <VAR>high_frame</VAR>:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-list-frames 3 5
^done,stack=
[frame={level="3",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="4",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"},
frame={level="5",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
Show a single frame:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-list-frames 3 3
^done,stack=
[frame={level="3",addr="0x000107a4",func="foo",
file="recursive2.c",fullname="/home/foo/bar/recursive2.c",line="14"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC405"></A>
<H3> The <CODE>-stack-list-locals</CODE> Command </H3>
<!--docid::SEC405::-->
<P>
<A NAME="SEC406"></A>
<H4> Synopsis </H4>
<!--docid::SEC406::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -stack-list-locals <VAR>print-values</VAR>
</FONT></pre></td></tr></table></P><P>
Display the local variable names for the selected frame. If
<VAR>print-values</VAR> is 0 or <CODE>--no-values</CODE>, print only the names of
the variables; if it is 1 or <CODE>--all-values</CODE>, print also their
values; and if it is 2 or <CODE>--simple-values</CODE>, print the name,
type and value for simple data types and the name and type for arrays,
structures and unions. In this last case, a frontend can immediately
display the value of simple data types and create variable objects for
other data types when the user wishes to explore their values in
more detail.
</P><P>
<A NAME="SEC407"></A>
<H4> GDB Command </H4>
<!--docid::SEC407::-->
<P>
<SAMP>`info locals'</SAMP> in GDB, <SAMP>`gdb_get_locals'</SAMP> in <CODE>gdbtk</CODE>.
</P><P>
<A NAME="SEC408"></A>
<H4> Example </H4>
<!--docid::SEC408::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-list-locals 0
^done,locals=[name="A",name="B",name="C"]
(gdb)
-stack-list-locals --all-values
^done,locals=[{name="A",value="1"},{name="B",value="2"},
{name="C",value="{1, 2, 3}"}]
-stack-list-locals --simple-values
^done,locals=[{name="A",type="int",value="1"},
{name="B",type="int",value="2"},{name="C",type="int [3]"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC409"></A>
<H3> The <CODE>-stack-select-frame</CODE> Command </H3>
<!--docid::SEC409::-->
<P>
<A NAME="SEC410"></A>
<H4> Synopsis </H4>
<!--docid::SEC410::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -stack-select-frame <VAR>framenum</VAR>
</FONT></pre></td></tr></table></P><P>
Change the selected frame. Select a different frame <VAR>framenum</VAR> on
the stack.
</P><P>
<A NAME="SEC411"></A>
<H4> GDB Command </H4>
<!--docid::SEC411::-->
<P>
The corresponding GDB commands are <SAMP>`frame'</SAMP>, <SAMP>`up'</SAMP>,
<SAMP>`down'</SAMP>, <SAMP>`select-frame'</SAMP>, <SAMP>`up-silent'</SAMP>, and <SAMP>`down-silent'</SAMP>.
</P><P>
<A NAME="SEC412"></A>
<H4> Example </H4>
<!--docid::SEC412::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-stack-select-frame 2
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Variable Objects"></A>
<HR SIZE="6">
<A NAME="SEC413"></A>
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<H2> 24.12 GDB/MI Variable Objects </H2>
<!--docid::SEC413::-->
<P>
<A NAME="SEC414"></A>
<H3> Introduction to Variable Objects </H3>
<!--docid::SEC414::-->
<P>
<A NAME="IDX1287"></A>
</P><P>
Variable objects are "object-oriented" MI interface for examining and
changing values of expressions. Unlike some other MI interfaces that
work with expressions, variable objects are specifically designed for
simple and efficient presentation in the frontend. A variable object
is identified by string name. When a variable object is created, the
frontend specifies the expression for that variable object. The
expression can be a simple variable, or it can be an arbitrary complex
expression, and can even involve CPU registers. After creating a
variable object, the frontend can invoke other variable object
operations--for example to obtain or change the value of a variable
object, or to change display format.
</P><P>
Variable objects have hierarchical tree structure. Any variable object
that corresponds to a composite type, such as structure in C, has
a number of child variable objects, for example corresponding to each
element of a structure. A child variable object can itself have
children, recursively. Recursion ends when we reach
leaf variable objects, which always have built-in types. Child variable
objects are created only by explicit request, so if a frontend
is not interested in the children of a particular variable object, no
child will be created.
</P><P>
For a leaf variable object it is possible to obtain its value as a
string, or set the value from a string. String value can be also
obtained for a non-leaf variable object, but it's generally a string
that only indicates the type of the object, and does not list its
contents. Assignment to a non-leaf variable object is not allowed.
A frontend does not need to read the values of all variable objects each time
the program stops. Instead, MI provides an update command that lists all
variable objects whose values has changed since the last update
operation. This considerably reduces the amount of data that must
be transferred to the frontend. As noted above, children variable
objects are created on demand, and only leaf variable objects have a
real value. As result, gdb will read target memory only for leaf
variables that frontend has created.
</P><P>
The automatic update is not always desirable. For example, a frontend
might want to keep a value of some expression for future reference,
and never update it. For another example, fetching memory is
relatively slow for embedded targets, so a frontend might want
to disable automatic update for the variables that are either not
visible on the screen, or "closed". This is possible using so
called "frozen variable objects". Such variable objects are never
implicitly updated.
</P><P>
The following is the complete set of GDB/MI operations defined to
access this functionality:
</P><P>
<TABLE>
<TR><TD><STRONG>Operation</STRONG></TD>
</TD><TD> <STRONG>Description</STRONG>
</TR>
<TR><TD><CODE>-var-create</CODE></TD>
</TD><TD> create a variable object
</TR>
<TR><TD><CODE>-var-delete</CODE></TD>
</TD><TD> delete the variable object and/or its children
</TR>
<TR><TD><CODE>-var-set-format</CODE></TD>
</TD><TD> set the display format of this variable
</TR>
<TR><TD><CODE>-var-show-format</CODE></TD>
</TD><TD> show the display format of this variable
</TR>
<TR><TD><CODE>-var-info-num-children</CODE></TD>
</TD><TD> tells how many children this object has
</TR>
<TR><TD><CODE>-var-list-children</CODE></TD>
</TD><TD> return a list of the object's children
</TR>
<TR><TD><CODE>-var-info-type</CODE></TD>
</TD><TD> show the type of this variable object
</TR>
<TR><TD><CODE>-var-info-expression</CODE></TD>
</TD><TD> print parent-relative expression that this variable object represents
</TR>
<TR><TD><CODE>-var-info-path-expression</CODE></TD>
</TD><TD> print full expression that this variable object represents
</TR>
<TR><TD><CODE>-var-show-attributes</CODE></TD>
</TD><TD> is this variable editable? does it exist here?
</TR>
<TR><TD><CODE>-var-evaluate-expression</CODE></TD>
</TD><TD> get the value of this variable
</TR>
<TR><TD><CODE>-var-assign</CODE></TD>
</TD><TD> set the value of this variable
</TR>
<TR><TD><CODE>-var-update</CODE></TD>
</TD><TD> update the variable and its children
</TR>
<TR><TD><CODE>-var-set-frozen</CODE></TD>
</TD><TD> set frozeness attribute
</TR></TABLE>
<P>
In the next subsection we describe each operation in detail and suggest
how it can be used.
</P><P>
<A NAME="SEC415"></A>
<H3> Description And Use of Operations on Variable Objects </H3>
<!--docid::SEC415::-->
<P>
<A NAME="SEC416"></A>
<H3> The <CODE>-var-create</CODE> Command </H3>
<!--docid::SEC416::-->
<P>
<A NAME="SEC417"></A>
<H4> Synopsis </H4>
<!--docid::SEC417::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-create {<VAR>name</VAR> | "-"}
{<VAR>frame-addr</VAR> | "*"} <VAR>expression</VAR>
</FONT></pre></td></tr></table></P><P>
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.
</P><P>
The <VAR>name</VAR> parameter is the string by which the object can be
referenced. It must be unique. If <SAMP>`-'</SAMP> is specified, the varobj
system will generate a string "varNNNNNN" automatically. It will be
unique provided that one does not specify <VAR>name</VAR> on that format.
The command fails if a duplicate name is found.
</P><P>
The frame under which the expression should be evaluated can be
specified by <VAR>frame-addr</VAR>. A <SAMP>`*'</SAMP> indicates that the current
frame should be used.
</P><P>
<VAR>expression</VAR> is any expression valid on the current language set (must not
begin with a <SAMP>`*'</SAMP>), or one of the following:
</P><P>
<UL>
<LI>
<SAMP>`*<VAR>addr</VAR>'</SAMP>, where <VAR>addr</VAR> is the address of a memory cell
<P>
<LI>
<SAMP>`*<VAR>addr</VAR>-<VAR>addr</VAR>'</SAMP> -- a memory address range (TBD)
<P>
<LI>
<SAMP>`$<VAR>regname</VAR>'</SAMP> -- a CPU register name
</UL>
<P>
<A NAME="SEC418"></A>
<H4> Result </H4>
<!--docid::SEC418::-->
<P>
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 GDB CLI:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> name="<VAR>name</VAR>",numchild="N",type="<VAR>type</VAR>"
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC419"></A>
<H3> The <CODE>-var-delete</CODE> Command </H3>
<!--docid::SEC419::-->
<P>
<A NAME="SEC420"></A>
<H4> Synopsis </H4>
<!--docid::SEC420::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-delete [ -c ] <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
Deletes a previously created variable object and all of its children.
With the <SAMP>`-c'</SAMP> option, just deletes the children.
</P><P>
Returns an error if the object <VAR>name</VAR> is not found.
</P><P>
<A NAME="SEC421"></A>
<H3> The <CODE>-var-set-format</CODE> Command </H3>
<!--docid::SEC421::-->
<P>
<A NAME="SEC422"></A>
<H4> Synopsis </H4>
<!--docid::SEC422::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-set-format <VAR>name</VAR> <VAR>format-spec</VAR>
</FONT></pre></td></tr></table></P><P>
Sets the output format for the value of the object <VAR>name</VAR> to be
<VAR>format-spec</VAR>.
</P><P>
The syntax for the <VAR>format-spec</VAR> is as follows:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> <VAR>format-spec</VAR> ==>
{binary | decimal | hexadecimal | octal | natural}
</FONT></pre></td></tr></table></P><P>
The natural format is the default format choosen automatically
based on the variable type (like decimal for an <CODE>int</CODE>, hex
for pointers, etc.).
</P><P>
For a variable with children, the format is set only on the
variable itself, and the children are not affected.
</P><P>
<A NAME="SEC423"></A>
<H3> The <CODE>-var-show-format</CODE> Command </H3>
<!--docid::SEC423::-->
<P>
<A NAME="SEC424"></A>
<H4> Synopsis </H4>
<!--docid::SEC424::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-show-format <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
Returns the format used to display the value of the object <VAR>name</VAR>.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> <VAR>format</VAR> ==>
<VAR>format-spec</VAR>
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC425"></A>
<H3> The <CODE>-var-info-num-children</CODE> Command </H3>
<!--docid::SEC425::-->
<P>
<A NAME="SEC426"></A>
<H4> Synopsis </H4>
<!--docid::SEC426::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-info-num-children <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
Returns the number of children of a variable object <VAR>name</VAR>:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> numchild=<VAR>n</VAR>
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC427"></A>
<H3> The <CODE>-var-list-children</CODE> Command </H3>
<!--docid::SEC427::-->
<P>
<A NAME="SEC428"></A>
<H4> Synopsis </H4>
<!--docid::SEC428::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-list-children [<VAR>print-values</VAR>] <VAR>name</VAR>
</FONT></pre></td></tr></table><A NAME="-var-list-children"></A>
</P><P>
Return a list of the children of the specified variable object and
create variable objects for them, if they do not already exist. With
a single argument or if <VAR>print-values</VAR> has a value for of 0 or
<CODE>--no-values</CODE>, print only the names of the variables; if
<VAR>print-values</VAR> is 1 or <CODE>--all-values</CODE>, also print their
values; and if it is 2 or <CODE>--simple-values</CODE> print the name and
value for simple data types and just the name for arrays, structures
and unions.
</P><P>
<A NAME="SEC429"></A>
<H4> Example </H4>
<!--docid::SEC429::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-var-list-children n
^done,numchild=<VAR>n</VAR>,children=[{name=<VAR>name</VAR>,
numchild=<VAR>n</VAR>,type=<VAR>type</VAR>},(repeats N times)]
(gdb)
-var-list-children --all-values n
^done,numchild=<VAR>n</VAR>,children=[{name=<VAR>name</VAR>,
numchild=<VAR>n</VAR>,value=<VAR>value</VAR>,type=<VAR>type</VAR>},(repeats N times)]
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC430"></A>
<H3> The <CODE>-var-info-type</CODE> Command </H3>
<!--docid::SEC430::-->
<P>
<A NAME="SEC431"></A>
<H4> Synopsis </H4>
<!--docid::SEC431::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-info-type <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
Returns the type of the specified variable <VAR>name</VAR>. The type is
returned as a string in the same format as it is output by the
GDB CLI:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> type=<VAR>typename</VAR>
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC432"></A>
<H3> The <CODE>-var-info-expression</CODE> Command </H3>
<!--docid::SEC432::-->
<P>
<A NAME="SEC433"></A>
<H4> Synopsis </H4>
<!--docid::SEC433::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-info-expression <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
Returns a string that is suitable for presenting this
variable object in user interface. The string is generally
not valid expression in the current language, and cannot be evaluated.
</P><P>
For example, if <CODE>a</CODE> is an array, and variable object
<CODE>A</CODE> was created for <CODE>a</CODE>, then we'll get this output:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb) -var-info-expression A.1
^done,lang="C",exp="1"
</FONT></pre></td></tr></table></P><P>
Here, the values of <CODE>lang</CODE> can be <CODE>{"C" | "C++" | "Java"}</CODE>.
</P><P>
Note that the output of the <CODE>-var-list-children</CODE> command also
includes those expressions, so the <CODE>-var-info-expression</CODE> command
is of limited use.
</P><P>
<A NAME="SEC434"></A>
<H3> The <CODE>-var-info-path-expression</CODE> Command </H3>
<!--docid::SEC434::-->
<P>
<A NAME="SEC435"></A>
<H4> Synopsis </H4>
<!--docid::SEC435::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-info-path-expression <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
Returns an expression that can be evaluated in the current
context and will yield the same value that a variable object has.
Compare this with the <CODE>-var-info-expression</CODE> command, which
result can be used only for UI presentation. Typical use of
the <CODE>-var-info-path-expression</CODE> command is creating a
watchpoint from a variable object.
</P><P>
For example, suppose <CODE>C</CODE> is a C<TT>++</TT> class, derived from class
<CODE>Base</CODE>, and that the <CODE>Base</CODE> class has a member called
<CODE>m_size</CODE>. Assume a variable <CODE>c</CODE> is has the type of
<CODE>C</CODE> and a variable object <CODE>C</CODE> was created for variable
<CODE>c</CODE>. Then, we'll get this output:
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb) -var-info-path-expression C.Base.public.m_size
^done,path_expr=((Base)c).m_size)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC436"></A>
<H3> The <CODE>-var-show-attributes</CODE> Command </H3>
<!--docid::SEC436::-->
<P>
<A NAME="SEC437"></A>
<H4> Synopsis </H4>
<!--docid::SEC437::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-show-attributes <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
List attributes of the specified variable object <VAR>name</VAR>:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> status=<VAR>attr</VAR> [ ( ,<VAR>attr</VAR> )* ]
</FONT></pre></td></tr></table></P><P>
where <VAR>attr</VAR> is <CODE>{ { editable | noneditable } | TBD }</CODE>.
</P><P>
<A NAME="SEC438"></A>
<H3> The <CODE>-var-evaluate-expression</CODE> Command </H3>
<!--docid::SEC438::-->
<P>
<A NAME="SEC439"></A>
<H4> Synopsis </H4>
<!--docid::SEC439::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-evaluate-expression <VAR>name</VAR>
</FONT></pre></td></tr></table></P><P>
Evaluates the expression that is represented by the specified variable
object and returns its value as a string. The format of the
string can be changed using the <CODE>-var-set-format</CODE> command.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> value=<VAR>value</VAR>
</FONT></pre></td></tr></table></P><P>
Note that one must invoke <CODE>-var-list-children</CODE> for a variable
before the value of a child variable can be evaluated.
</P><P>
<A NAME="SEC440"></A>
<H3> The <CODE>-var-assign</CODE> Command </H3>
<!--docid::SEC440::-->
<P>
<A NAME="SEC441"></A>
<H4> Synopsis </H4>
<!--docid::SEC441::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-assign <VAR>name</VAR> <VAR>expression</VAR>
</FONT></pre></td></tr></table></P><P>
Assigns the value of <VAR>expression</VAR> to the variable object specified
by <VAR>name</VAR>. The object must be <SAMP>`editable'</SAMP>. If the variable's
value is altered by the assign, the variable will show up in any
subsequent <CODE>-var-update</CODE> list.
</P><P>
<A NAME="SEC442"></A>
<H4> Example </H4>
<!--docid::SEC442::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-var-assign var1 3
^done,value="3"
(gdb)
-var-update *
^done,changelist=[{name="var1",in_scope="true",type_changed="false"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC443"></A>
<H3> The <CODE>-var-update</CODE> Command </H3>
<!--docid::SEC443::-->
<P>
<A NAME="SEC444"></A>
<H4> Synopsis </H4>
<!--docid::SEC444::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-update [<VAR>print-values</VAR>] {<VAR>name</VAR> | "*"}
</FONT></pre></td></tr></table></P><P>
Reevaluate the expressions corresponding to the variable object
<VAR>name</VAR> and all its direct and indirect children, and return the
list of variable objects whose values have changed; <VAR>name</VAR> must
be a root variable object. Here, "changed" means that the result of
<CODE>-var-evaluate-expression</CODE> before and after the
<CODE>-var-update</CODE> is different. If <SAMP>`*'</SAMP> is used as the variable
object names, all existing variable objects are updated, except
for frozen ones (see <A HREF="gdb_25.html#-var-set-frozen">-var-set-frozen</A>). The option
<VAR>print-values</VAR> determines whether both names and values, or just
names are printed. The possible values of this options are the same
as for <CODE>-var-list-children</CODE> (see <A HREF="gdb_25.html#-var-list-children">-var-list-children</A>). It is
recommended to use the <SAMP>`--all-values'</SAMP> option, to reduce the
number of MI commands needed on each program stop.
</P><P>
<A NAME="SEC445"></A>
<H4> Example </H4>
<!--docid::SEC445::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-var-assign var1 3
^done,value="3"
(gdb)
-var-update --all-values var1
^done,changelist=[{name="var1",value="3",in_scope="true",
type_changed="false"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="-var-update"></A>
The field in_scope may take three values:
</P><P>
<DL COMPACT>
<DT><CODE>"true"</CODE>
<DD>The variable object's current value is valid.
<P>
<DT><CODE>"false"</CODE>
<DD>The variable object does not currently hold a valid value but it may
hold one in the future if its associated expression comes back into
scope.
<P>
<DT><CODE>"invalid"</CODE>
<DD>The variable object no longer holds a valid value.
This can occur when the executable file being debugged has changed,
either through recompilation or by using the GDB <CODE>file</CODE>
command. The front end should normally choose to delete these variable
objects.
</DL>
<P>
In the future new values may be added to this list so the front should
be prepared for this possibility. See section <A HREF="gdb_25.html#SEC249">GDB/MI Development and Front Ends</A>.
</P><P>
<A NAME="SEC446"></A>
<H3> The <CODE>-var-set-frozen</CODE> Command </H3>
<!--docid::SEC446::-->
<A NAME="-var-set-frozen"></A>
<P>
<A NAME="SEC447"></A>
<H4> Synopsis </H4>
<!--docid::SEC447::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -var-set-frozen <VAR>name</VAR> <VAR>flag</VAR>
</FONT></pre></td></tr></table></P><P>
Set the frozenness flag on the variable object <VAR>name</VAR>. The
<VAR>flag</VAR> parameter should be either <SAMP>`1'</SAMP> to make the variable
frozen or <SAMP>`0'</SAMP> to make it unfrozen. If a variable object is
frozen, then neither itself, nor any of its children, are
implicitly updated by <CODE>-var-update</CODE> of
a parent variable or by <CODE>-var-update *</CODE>. Only
<CODE>-var-update</CODE> of the variable itself will update its value and
values of its children. After a variable object is unfrozen, it is
implicitly updated by all subsequent <CODE>-var-update</CODE> operations.
Unfreezing a variable does not update it, only subsequent
<CODE>-var-update</CODE> does.
</P><P>
<A NAME="SEC448"></A>
<H4> Example </H4>
<!--docid::SEC448::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-var-set-frozen V 1
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Data Manipulation"></A>
<HR SIZE="6">
<A NAME="SEC449"></A>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_38.html#SEC764">Index</A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_abt.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<H2> 24.13 GDB/MI Data Manipulation </H2>
<!--docid::SEC449::-->
<P>
<A NAME="IDX1288"></A>
<A NAME="IDX1289"></A>
This section describes the GDB/MI commands that manipulate data:
examine memory and registers, evaluate expressions, etc.
</P><P>
<A NAME="SEC450"></A>
<H3> The <CODE>-data-disassemble</CODE> Command </H3>
<!--docid::SEC450::-->
<P>
<A NAME="SEC451"></A>
<H4> Synopsis </H4>
<!--docid::SEC451::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -data-disassemble
[ -s <VAR>start-addr</VAR> -e <VAR>end-addr</VAR> ]
| [ -f <VAR>filename</VAR> -l <VAR>linenum</VAR> [ -n <VAR>lines</VAR> ] ]
-- <VAR>mode</VAR>
</FONT></pre></td></tr></table></P><P>
Where:
</P><P>
<DL COMPACT>
<DT><SAMP>`<VAR>start-addr</VAR>'</SAMP>
<DD>is the beginning address (or <CODE>$pc</CODE>)
<DT><SAMP>`<VAR>end-addr</VAR>'</SAMP>
<DD>is the end address
<DT><SAMP>`<VAR>filename</VAR>'</SAMP>
<DD>is the name of the file to disassemble
<DT><SAMP>`<VAR>linenum</VAR>'</SAMP>
<DD>is the line number to disassemble around
<DT><SAMP>`<VAR>lines</VAR>'</SAMP>
<DD>is the number of disassembly lines to be produced. If it is -1,
the whole function will be disassembled, in case no <VAR>end-addr</VAR> is
specified. If <VAR>end-addr</VAR> is specified as a non-zero value, and
<VAR>lines</VAR> is lower than the number of disassembly lines between
<VAR>start-addr</VAR> and <VAR>end-addr</VAR>, only <VAR>lines</VAR> lines are
displayed; if <VAR>lines</VAR> is higher than the number of lines between
<VAR>start-addr</VAR> and <VAR>end-addr</VAR>, only the lines up to <VAR>end-addr</VAR>
are displayed.
<DT><SAMP>`<VAR>mode</VAR>'</SAMP>
<DD>is either 0 (meaning only disassembly) or 1 (meaning mixed source and
disassembly).
</DL>
<P>
<A NAME="SEC452"></A>
<H4> Result </H4>
<!--docid::SEC452::-->
<P>
The output for each instruction is composed of four fields:
</P><P>
<UL>
<LI>Address
<LI>Func-name
<LI>Offset
<LI>Instruction
</UL>
<P>
Note that whatever included in the instruction field, is not manipulated
directly by GDB/MI, i.e., it is not possible to adjust its format.
</P><P>
<A NAME="SEC453"></A>
<H4> GDB Command </H4>
<!--docid::SEC453::-->
<P>
There's no direct mapping from this command to the CLI.
</P><P>
<A NAME="SEC454"></A>
<H4> Example </H4>
<!--docid::SEC454::-->
<P>
Disassemble from the current value of <CODE>$pc</CODE> to <CODE>$pc + 20</CODE>:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-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>"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
Disassemble the whole <CODE>main</CODE> function. Line 32 is part of
<CODE>main</CODE>.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-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"},
[<small>...</small>]
{address="0x0001081c",func-name="main",offset="96",inst="ret "},
{address="0x00010820",func-name="main",offset="100",inst="restore "}]
(gdb)
</FONT></pre></td></tr></table></P><P>
Disassemble 3 instructions from the start of <CODE>main</CODE>:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-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"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
Disassemble 3 instructions from the start of <CODE>main</CODE> in mixed mode:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-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"}]}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC455"></A>
<H3> The <CODE>-data-evaluate-expression</CODE> Command </H3>
<!--docid::SEC455::-->
<P>
<A NAME="SEC456"></A>
<H4> Synopsis </H4>
<!--docid::SEC456::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -data-evaluate-expression <VAR>expr</VAR>
</FONT></pre></td></tr></table></P><P>
Evaluate <VAR>expr</VAR> 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.
</P><P>
<A NAME="SEC457"></A>
<H4> GDB Command </H4>
<!--docid::SEC457::-->
<P>
The corresponding GDB commands are <SAMP>`print'</SAMP>, <SAMP>`output'</SAMP>, and
<SAMP>`call'</SAMP>. In <CODE>gdbtk</CODE> only, there's a corresponding
<SAMP>`gdb_eval'</SAMP> command.
</P><P>
<A NAME="SEC458"></A>
<H4> Example </H4>
<!--docid::SEC458::-->
<P>
In the following example, the numbers that precede the commands are the
<EM>tokens</EM> described in <A HREF="gdb_25.html#SEC245">GDB/MI Command Syntax</A>. Notice how GDB/MI returns the same tokens in its
output.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>211-data-evaluate-expression A
211^done,value="1"
(gdb)
311-data-evaluate-expression &#38;A
311^done,value="0xefffeb7c"
(gdb)
411-data-evaluate-expression A+3
411^done,value="4"
(gdb)
511-data-evaluate-expression "A + 3"
511^done,value="4"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC459"></A>
<H3> The <CODE>-data-list-changed-registers</CODE> Command </H3>
<!--docid::SEC459::-->
<P>
<A NAME="SEC460"></A>
<H4> Synopsis </H4>
<!--docid::SEC460::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -data-list-changed-registers
</FONT></pre></td></tr></table></P><P>
Display a list of the registers that have changed.
</P><P>
<A NAME="SEC461"></A>
<H4> GDB Command </H4>
<!--docid::SEC461::-->
<P>
GDB doesn't have a direct analog for this command; <CODE>gdbtk</CODE>
has the corresponding command <SAMP>`gdb_changed_register_list'</SAMP>.
</P><P>
<A NAME="SEC462"></A>
<H4> Example </H4>
<!--docid::SEC462::-->
<P>
On a PPC MBX board:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-exec-continue
^running
(gdb)
*stopped,reason="breakpoint-hit",bkptno="1",frame={func="main",
args=[],file="try.c",fullname="/home/foo/bar/try.c",line="5"}
(gdb)
-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"]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC463"></A>
<H3> The <CODE>-data-list-register-names</CODE> Command </H3>
<!--docid::SEC463::-->
<P>
<A NAME="SEC464"></A>
<H4> Synopsis </H4>
<!--docid::SEC464::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -data-list-register-names [ ( <VAR>regno</VAR> )+ ]
</FONT></pre></td></tr></table></P><P>
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. To ensure
consistency between a register name and its number, the output list may
include empty register names.
</P><P>
<A NAME="SEC465"></A>
<H4> GDB Command </H4>
<!--docid::SEC465::-->
<P>
GDB does not have a command which corresponds to
<SAMP>`-data-list-register-names'</SAMP>. In <CODE>gdbtk</CODE> there is a
corresponding command <SAMP>`gdb_regnames'</SAMP>.
</P><P>
<A NAME="SEC466"></A>
<H4> Example </H4>
<!--docid::SEC466::-->
<P>
For the PPC MBX board:
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-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"]
(gdb)
-data-list-register-names 1 2 3
^done,register-names=["r1","r2","r3"]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC467"></A>
<H3> The <CODE>-data-list-register-values</CODE> Command </H3>
<!--docid::SEC467::-->
<P>
<A NAME="SEC468"></A>
<H4> Synopsis </H4>
<!--docid::SEC468::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -data-list-register-values <VAR>fmt</VAR> [ ( <VAR>regno</VAR> )*]
</FONT></pre></td></tr></table></P><P>
Display the registers' contents. <VAR>fmt</VAR> 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.
</P><P>
Allowed formats for <VAR>fmt</VAR> are:
</P><P>
<DL COMPACT>
<DT><CODE>x</CODE>
<DD>Hexadecimal
<DT><CODE>o</CODE>
<DD>Octal
<DT><CODE>t</CODE>
<DD>Binary
<DT><CODE>d</CODE>
<DD>Decimal
<DT><CODE>r</CODE>
<DD>Raw
<DT><CODE>N</CODE>
<DD>Natural
</DL>
<P>
<A NAME="SEC469"></A>
<H4> GDB Command </H4>
<!--docid::SEC469::-->
<P>
The corresponding GDB commands are <SAMP>`info reg'</SAMP>, <SAMP>`info
all-reg'</SAMP>, and (in <CODE>gdbtk</CODE>) <SAMP>`gdb_fetch_registers'</SAMP>.
</P><P>
<A NAME="SEC470"></A>
<H4> Example </H4>
<!--docid::SEC470::-->
<P>
For a PPC MBX board (note: line breaks are for readability only, they
don't appear in the actual output):
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-data-list-register-values r 64 65
^done,register-values=[{number="64",value="0xfe00a300"},
{number="65",value="0x00029002"}]
(gdb)
-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"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC471"></A>
<H3> The <CODE>-data-read-memory</CODE> Command </H3>
<!--docid::SEC471::-->
<P>
<A NAME="SEC472"></A>
<H4> Synopsis </H4>
<!--docid::SEC472::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -data-read-memory [ -o <VAR>byte-offset</VAR> ]
<VAR>address</VAR> <VAR>word-format</VAR> <VAR>word-size</VAR>
<VAR>nr-rows</VAR> <VAR>nr-cols</VAR> [ <VAR>aschar</VAR> ]
</FONT></pre></td></tr></table></P><P>
where:
</P><P>
<DL COMPACT>
<DT><SAMP>`<VAR>address</VAR>'</SAMP>
<DD>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.
<P>
<DT><SAMP>`<VAR>word-format</VAR>'</SAMP>
<DD>The format to be used to print the memory words. The notation is the
same as for GDB's <CODE>print</CODE> command (see section <A HREF="gdb_9.html#SEC63">Output Formats</A>).
<P>
<DT><SAMP>`<VAR>word-size</VAR>'</SAMP>
<DD>The size of each memory word in bytes.
<P>
<DT><SAMP>`<VAR>nr-rows</VAR>'</SAMP>
<DD>The number of rows in the output table.
<P>
<DT><SAMP>`<VAR>nr-cols</VAR>'</SAMP>
<DD>The number of columns in the output table.
<P>
<DT><SAMP>`<VAR>aschar</VAR>'</SAMP>
<DD>If present, indicates that each row should include an ASCII dump. The
value of <VAR>aschar</VAR> is used as a padding character when a byte is not a
member of the printable ASCII character set (printable ASCII
characters are those whose code is between 32 and 126, inclusively).
<P>
<DT><SAMP>`<VAR>byte-offset</VAR>'</SAMP>
<DD>An offset to add to the <VAR>address</VAR> before fetching memory.
</DL>
<P>
This command displays memory contents as a table of <VAR>nr-rows</VAR> by
<VAR>nr-cols</VAR> words, each word being <VAR>word-size</VAR> bytes. In total,
<CODE><VAR>nr-rows</VAR> * <VAR>nr-cols</VAR> * <VAR>word-size</VAR></CODE> bytes are read
(returned as <SAMP>`total-bytes'</SAMP>). Should less than the requested number
of bytes be returned by the target, the missing words are identified
using <SAMP>`N/A'</SAMP>. The number of bytes read from the target is returned
in <SAMP>`nr-bytes'</SAMP> and the starting address used to read memory in
<SAMP>`addr'</SAMP>.
</P><P>
The address of the next/previous row or page is available in
<SAMP>`next-row'</SAMP> and <SAMP>`prev-row'</SAMP>, <SAMP>`next-page'</SAMP> and
<SAMP>`prev-page'</SAMP>.
</P><P>
<A NAME="SEC473"></A>
<H4> GDB Command </H4>
<!--docid::SEC473::-->
<P>
The corresponding GDB command is <SAMP>`x'</SAMP>. <CODE>gdbtk</CODE> has
<SAMP>`gdb_get_mem'</SAMP> memory read command.
</P><P>
<A NAME="SEC474"></A>
<H4> Example </H4>
<!--docid::SEC474::-->
<P>
Read six bytes of memory starting at <CODE>bytes+6</CODE> but then offset by
<CODE>-6</CODE> bytes. Format as three rows of two columns. One byte per
word. Display each word in hex.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
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"]}]
(gdb)
</FONT></pre></td></tr></table></P><P>
Read two bytes of memory starting at address <CODE>shorts + 64</CODE> and
display as a single word formatted in decimal.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
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"]}]
(gdb)
</FONT></pre></td></tr></table></P><P>
Read thirty two bytes of memory starting at <CODE>bytes+16</CODE> and format
as eight rows of four columns. Include a string encoding with <SAMP>`x'</SAMP>
used as the non-printable character.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
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=",-./"}]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Tracepoint Commands"></A>
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<H2> 24.14 GDB/MI Tracepoint Commands </H2>
<!--docid::SEC475::-->
<P>
The tracepoint commands are not yet implemented.
</P><P>
<A NAME="GDB/MI Symbol Query"></A>
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</TR></TABLE>
<H2> 24.15 GDB/MI Symbol Query Commands </H2>
<!--docid::SEC476::-->
<P>
<A NAME="SEC477"></A>
<H3> The <CODE>-symbol-info-address</CODE> Command </H3>
<!--docid::SEC477::-->
<P>
<A NAME="SEC478"></A>
<H4> Synopsis </H4>
<!--docid::SEC478::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-info-address <VAR>symbol</VAR>
</FONT></pre></td></tr></table></P><P>
Describe where <VAR>symbol</VAR> is stored.
</P><P>
<A NAME="SEC479"></A>
<H4> GDB Command </H4>
<!--docid::SEC479::-->
<P>
The corresponding GDB command is <SAMP>`info address'</SAMP>.
</P><P>
<A NAME="SEC480"></A>
<H4> Example </H4>
<!--docid::SEC480::-->
N.A.
<P>
<A NAME="SEC481"></A>
<H3> The <CODE>-symbol-info-file</CODE> Command </H3>
<!--docid::SEC481::-->
<P>
<A NAME="SEC482"></A>
<H4> Synopsis </H4>
<!--docid::SEC482::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-info-file
</FONT></pre></td></tr></table></P><P>
Show the file for the symbol.
</P><P>
<A NAME="SEC483"></A>
<H4> GDB Command </H4>
<!--docid::SEC483::-->
<P>
There's no equivalent GDB command. <CODE>gdbtk</CODE> has
<SAMP>`gdb_find_file'</SAMP>.
</P><P>
<A NAME="SEC484"></A>
<H4> Example </H4>
<!--docid::SEC484::-->
N.A.
<P>
<A NAME="SEC485"></A>
<H3> The <CODE>-symbol-info-function</CODE> Command </H3>
<!--docid::SEC485::-->
<P>
<A NAME="SEC486"></A>
<H4> Synopsis </H4>
<!--docid::SEC486::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-info-function
</FONT></pre></td></tr></table></P><P>
Show which function the symbol lives in.
</P><P>
<A NAME="SEC487"></A>
<H4> GDB Command </H4>
<!--docid::SEC487::-->
<P>
<SAMP>`gdb_get_function'</SAMP> in <CODE>gdbtk</CODE>.
</P><P>
<A NAME="SEC488"></A>
<H4> Example </H4>
<!--docid::SEC488::-->
N.A.
<P>
<A NAME="SEC489"></A>
<H3> The <CODE>-symbol-info-line</CODE> Command </H3>
<!--docid::SEC489::-->
<P>
<A NAME="SEC490"></A>
<H4> Synopsis </H4>
<!--docid::SEC490::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-info-line
</FONT></pre></td></tr></table></P><P>
Show the core addresses of the code for a source line.
</P><P>
<A NAME="SEC491"></A>
<H4> GDB Command </H4>
<!--docid::SEC491::-->
<P>
The corresponding GDB command is <SAMP>`info line'</SAMP>.
<CODE>gdbtk</CODE> has the <SAMP>`gdb_get_line'</SAMP> and <SAMP>`gdb_get_file'</SAMP> commands.
</P><P>
<A NAME="SEC492"></A>
<H4> Example </H4>
<!--docid::SEC492::-->
N.A.
<P>
<A NAME="SEC493"></A>
<H3> The <CODE>-symbol-info-symbol</CODE> Command </H3>
<!--docid::SEC493::-->
<P>
<A NAME="SEC494"></A>
<H4> Synopsis </H4>
<!--docid::SEC494::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-info-symbol <VAR>addr</VAR>
</FONT></pre></td></tr></table></P><P>
Describe what symbol is at location <VAR>addr</VAR>.
</P><P>
<A NAME="SEC495"></A>
<H4> GDB Command </H4>
<!--docid::SEC495::-->
<P>
The corresponding GDB command is <SAMP>`info symbol'</SAMP>.
</P><P>
<A NAME="SEC496"></A>
<H4> Example </H4>
<!--docid::SEC496::-->
N.A.
<P>
<A NAME="SEC497"></A>
<H3> The <CODE>-symbol-list-functions</CODE> Command </H3>
<!--docid::SEC497::-->
<P>
<A NAME="SEC498"></A>
<H4> Synopsis </H4>
<!--docid::SEC498::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-list-functions
</FONT></pre></td></tr></table></P><P>
List the functions in the executable.
</P><P>
<A NAME="SEC499"></A>
<H4> GDB Command </H4>
<!--docid::SEC499::-->
<P>
<SAMP>`info functions'</SAMP> in GDB, <SAMP>`gdb_listfunc'</SAMP> and
<SAMP>`gdb_search'</SAMP> in <CODE>gdbtk</CODE>.
</P><P>
<A NAME="SEC500"></A>
<H4> Example </H4>
<!--docid::SEC500::-->
N.A.
<P>
<A NAME="SEC501"></A>
<H3> The <CODE>-symbol-list-lines</CODE> Command </H3>
<!--docid::SEC501::-->
<P>
<A NAME="SEC502"></A>
<H4> Synopsis </H4>
<!--docid::SEC502::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-list-lines <VAR>filename</VAR>
</FONT></pre></td></tr></table></P><P>
Print the list of lines that contain code and their associated program
addresses for the given source filename. The entries are sorted in
ascending PC order.
</P><P>
<A NAME="SEC503"></A>
<H4> GDB Command </H4>
<!--docid::SEC503::-->
<P>
There is no corresponding GDB command.
</P><P>
<A NAME="SEC504"></A>
<H4> Example </H4>
<!--docid::SEC504::-->
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-symbol-list-lines basics.c
^done,lines=[{pc="0x08048554",line="7"},{pc="0x0804855a",line="8"}]
(gdb)
</FONT></pre></td></tr></table><P>
<A NAME="SEC505"></A>
<H3> The <CODE>-symbol-list-types</CODE> Command </H3>
<!--docid::SEC505::-->
<P>
<A NAME="SEC506"></A>
<H4> Synopsis </H4>
<!--docid::SEC506::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-list-types
</FONT></pre></td></tr></table></P><P>
List all the type names.
</P><P>
<A NAME="SEC507"></A>
<H4> GDB Command </H4>
<!--docid::SEC507::-->
<P>
The corresponding commands are <SAMP>`info types'</SAMP> in GDB,
<SAMP>`gdb_search'</SAMP> in <CODE>gdbtk</CODE>.
</P><P>
<A NAME="SEC508"></A>
<H4> Example </H4>
<!--docid::SEC508::-->
N.A.
<P>
<A NAME="SEC509"></A>
<H3> The <CODE>-symbol-list-variables</CODE> Command </H3>
<!--docid::SEC509::-->
<P>
<A NAME="SEC510"></A>
<H4> Synopsis </H4>
<!--docid::SEC510::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-list-variables
</FONT></pre></td></tr></table></P><P>
List all the global and static variable names.
</P><P>
<A NAME="SEC511"></A>
<H4> GDB Command </H4>
<!--docid::SEC511::-->
<P>
<SAMP>`info variables'</SAMP> in GDB, <SAMP>`gdb_search'</SAMP> in <CODE>gdbtk</CODE>.
</P><P>
<A NAME="SEC512"></A>
<H4> Example </H4>
<!--docid::SEC512::-->
N.A.
<P>
<A NAME="SEC513"></A>
<H3> The <CODE>-symbol-locate</CODE> Command </H3>
<!--docid::SEC513::-->
<P>
<A NAME="SEC514"></A>
<H4> Synopsis </H4>
<!--docid::SEC514::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-locate
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC515"></A>
<H4> GDB Command </H4>
<!--docid::SEC515::-->
<P>
<SAMP>`gdb_loc'</SAMP> in <CODE>gdbtk</CODE>.
</P><P>
<A NAME="SEC516"></A>
<H4> Example </H4>
<!--docid::SEC516::-->
N.A.
<P>
<A NAME="SEC517"></A>
<H3> The <CODE>-symbol-type</CODE> Command </H3>
<!--docid::SEC517::-->
<P>
<A NAME="SEC518"></A>
<H4> Synopsis </H4>
<!--docid::SEC518::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -symbol-type <VAR>variable</VAR>
</FONT></pre></td></tr></table></P><P>
Show type of <VAR>variable</VAR>.
</P><P>
<A NAME="SEC519"></A>
<H4> GDB Command </H4>
<!--docid::SEC519::-->
<P>
The corresponding GDB command is <SAMP>`ptype'</SAMP>, <CODE>gdbtk</CODE> has
<SAMP>`gdb_obj_variable'</SAMP>.
</P><P>
<A NAME="SEC520"></A>
<H4> Example </H4>
<!--docid::SEC520::-->
N.A.
<P>
<A NAME="GDB/MI File Commands"></A>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_abt.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<H2> 24.16 GDB/MI File Commands </H2>
<!--docid::SEC521::-->
<P>
This section describes the GDB/MI commands to specify executable file names
and to read in and obtain symbol table information.
</P><P>
<A NAME="SEC522"></A>
<H3> The <CODE>-file-exec-and-symbols</CODE> Command </H3>
<!--docid::SEC522::-->
<P>
<A NAME="SEC523"></A>
<H4> Synopsis </H4>
<!--docid::SEC523::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-exec-and-symbols <VAR>file</VAR>
</FONT></pre></td></tr></table></P><P>
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, GDB will produce
error messages. Otherwise, no output is produced, except a completion
notification.
</P><P>
<A NAME="SEC524"></A>
<H4> GDB Command </H4>
<!--docid::SEC524::-->
<P>
The corresponding GDB command is <SAMP>`file'</SAMP>.
</P><P>
<A NAME="SEC525"></A>
<H4> Example </H4>
<!--docid::SEC525::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-file-exec-and-symbols /kwikemart/marge/ezannoni/TRUNK/mbx/hello.mbx
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC526"></A>
<H3> The <CODE>-file-exec-file</CODE> Command </H3>
<!--docid::SEC526::-->
<P>
<A NAME="SEC527"></A>
<H4> Synopsis </H4>
<!--docid::SEC527::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-exec-file <VAR>file</VAR>
</FONT></pre></td></tr></table></P><P>
Specify the executable file to be debugged. Unlike
<SAMP>`-file-exec-and-symbols'</SAMP>, the symbol table is <EM>not</EM> read
from this file. If used without argument, GDB clears the information
about the executable file. No output is produced, except a completion
notification.
</P><P>
<A NAME="SEC528"></A>
<H4> GDB Command </H4>
<!--docid::SEC528::-->
<P>
The corresponding GDB command is <SAMP>`exec-file'</SAMP>.
</P><P>
<A NAME="SEC529"></A>
<H4> Example </H4>
<!--docid::SEC529::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-file-exec-file /kwikemart/marge/ezannoni/TRUNK/mbx/hello.mbx
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC530"></A>
<H3> The <CODE>-file-list-exec-sections</CODE> Command </H3>
<!--docid::SEC530::-->
<P>
<A NAME="SEC531"></A>
<H4> Synopsis </H4>
<!--docid::SEC531::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-list-exec-sections
</FONT></pre></td></tr></table></P><P>
List the sections of the current executable file.
</P><P>
<A NAME="SEC532"></A>
<H4> GDB Command </H4>
<!--docid::SEC532::-->
<P>
The GDB command <SAMP>`info file'</SAMP> shows, among the rest, the same
information as this command. <CODE>gdbtk</CODE> has a corresponding command
<SAMP>`gdb_load_info'</SAMP>.
</P><P>
<A NAME="SEC533"></A>
<H4> Example </H4>
<!--docid::SEC533::-->
N.A.
<P>
<A NAME="SEC534"></A>
<H3> The <CODE>-file-list-exec-source-file</CODE> Command </H3>
<!--docid::SEC534::-->
<P>
<A NAME="SEC535"></A>
<H4> Synopsis </H4>
<!--docid::SEC535::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-list-exec-source-file
</FONT></pre></td></tr></table></P><P>
List the line number, the current source file, and the absolute path
to the current source file for the current executable. The macro
information field has a value of <SAMP>`1'</SAMP> or <SAMP>`0'</SAMP> depending on
whether or not the file includes preprocessor macro information.
</P><P>
<A NAME="SEC536"></A>
<H4> GDB Command </H4>
<!--docid::SEC536::-->
<P>
The GDB equivalent is <SAMP>`info source'</SAMP>
</P><P>
<A NAME="SEC537"></A>
<H4> Example </H4>
<!--docid::SEC537::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
123-file-list-exec-source-file
123^done,line="1",file="foo.c",fullname="/home/bar/foo.c,macro-info="1"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC538"></A>
<H3> The <CODE>-file-list-exec-source-files</CODE> Command </H3>
<!--docid::SEC538::-->
<P>
<A NAME="SEC539"></A>
<H4> Synopsis </H4>
<!--docid::SEC539::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-list-exec-source-files
</FONT></pre></td></tr></table></P><P>
List the source files for the current executable.
</P><P>
It will always output the filename, but only when GDB can find
the absolute file name of a source file, will it output the fullname.
</P><P>
<A NAME="SEC540"></A>
<H4> GDB Command </H4>
<!--docid::SEC540::-->
<P>
The GDB equivalent is <SAMP>`info sources'</SAMP>.
<CODE>gdbtk</CODE> has an analogous command <SAMP>`gdb_listfiles'</SAMP>.
</P><P>
<A NAME="SEC541"></A>
<H4> Example </H4>
<!--docid::SEC541::-->
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-file-list-exec-source-files
^done,files=[
{file=foo.c,fullname=/home/foo.c},
{file=/home/bar.c,fullname=/home/bar.c},
{file=gdb_could_not_find_fullpath.c}]
(gdb)
</FONT></pre></td></tr></table><P>
<A NAME="SEC542"></A>
<H3> The <CODE>-file-list-shared-libraries</CODE> Command </H3>
<!--docid::SEC542::-->
<P>
<A NAME="SEC543"></A>
<H4> Synopsis </H4>
<!--docid::SEC543::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-list-shared-libraries
</FONT></pre></td></tr></table></P><P>
List the shared libraries in the program.
</P><P>
<A NAME="SEC544"></A>
<H4> GDB Command </H4>
<!--docid::SEC544::-->
<P>
The corresponding GDB command is <SAMP>`info shared'</SAMP>.
</P><P>
<A NAME="SEC545"></A>
<H4> Example </H4>
<!--docid::SEC545::-->
N.A.
<P>
<A NAME="SEC546"></A>
<H3> The <CODE>-file-list-symbol-files</CODE> Command </H3>
<!--docid::SEC546::-->
<P>
<A NAME="SEC547"></A>
<H4> Synopsis </H4>
<!--docid::SEC547::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-list-symbol-files
</FONT></pre></td></tr></table></P><P>
List symbol files.
</P><P>
<A NAME="SEC548"></A>
<H4> GDB Command </H4>
<!--docid::SEC548::-->
<P>
The corresponding GDB command is <SAMP>`info file'</SAMP> (part of it).
</P><P>
<A NAME="SEC549"></A>
<H4> Example </H4>
<!--docid::SEC549::-->
N.A.
<P>
<A NAME="SEC550"></A>
<H3> The <CODE>-file-symbol-file</CODE> Command </H3>
<!--docid::SEC550::-->
<P>
<A NAME="SEC551"></A>
<H4> Synopsis </H4>
<!--docid::SEC551::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -file-symbol-file <VAR>file</VAR>
</FONT></pre></td></tr></table></P><P>
Read symbol table info from the specified <VAR>file</VAR> argument. When
used without arguments, clears GDB's symbol table info. No output is
produced, except for a completion notification.
</P><P>
<A NAME="SEC552"></A>
<H4> GDB Command </H4>
<!--docid::SEC552::-->
<P>
The corresponding GDB command is <SAMP>`symbol-file'</SAMP>.
</P><P>
<A NAME="SEC553"></A>
<H4> Example </H4>
<!--docid::SEC553::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-file-symbol-file /kwikemart/marge/ezannoni/TRUNK/mbx/hello.mbx
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Target Manipulation"></A>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_abt.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<H2> 24.17 GDB/MI Target Manipulation Commands </H2>
<!--docid::SEC554::-->
<P>
<A NAME="SEC555"></A>
<H3> The <CODE>-target-attach</CODE> Command </H3>
<!--docid::SEC555::-->
<P>
<A NAME="SEC556"></A>
<H4> Synopsis </H4>
<!--docid::SEC556::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-attach <VAR>pid</VAR> | <VAR>file</VAR>
</FONT></pre></td></tr></table></P><P>
Attach to a process <VAR>pid</VAR> or a file <VAR>file</VAR> outside of GDB.
</P><P>
<A NAME="SEC557"></A>
<H4> GDB Command </H4>
<!--docid::SEC557::-->
<P>
The corresponding GDB command is <SAMP>`attach'</SAMP>.
</P><P>
<A NAME="SEC558"></A>
<H4> Example </H4>
<!--docid::SEC558::-->
N.A.
<P>
<A NAME="SEC559"></A>
<H3> The <CODE>-target-compare-sections</CODE> Command </H3>
<!--docid::SEC559::-->
<P>
<A NAME="SEC560"></A>
<H4> Synopsis </H4>
<!--docid::SEC560::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-compare-sections [ <VAR>section</VAR> ]
</FONT></pre></td></tr></table></P><P>
Compare data of section <VAR>section</VAR> on target to the exec file.
Without the argument, all sections are compared.
</P><P>
<A NAME="SEC561"></A>
<H4> GDB Command </H4>
<!--docid::SEC561::-->
<P>
The GDB equivalent is <SAMP>`compare-sections'</SAMP>.
</P><P>
<A NAME="SEC562"></A>
<H4> Example </H4>
<!--docid::SEC562::-->
N.A.
<P>
<A NAME="SEC563"></A>
<H3> The <CODE>-target-detach</CODE> Command </H3>
<!--docid::SEC563::-->
<P>
<A NAME="SEC564"></A>
<H4> Synopsis </H4>
<!--docid::SEC564::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-detach
</FONT></pre></td></tr></table></P><P>
Detach from the remote target which normally resumes its execution.
There's no output.
</P><P>
<A NAME="SEC565"></A>
<H4> GDB Command </H4>
<!--docid::SEC565::-->
<P>
The corresponding GDB command is <SAMP>`detach'</SAMP>.
</P><P>
<A NAME="SEC566"></A>
<H4> Example </H4>
<!--docid::SEC566::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-target-detach
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC567"></A>
<H3> The <CODE>-target-disconnect</CODE> Command </H3>
<!--docid::SEC567::-->
<P>
<A NAME="SEC568"></A>
<H4> Synopsis </H4>
<!--docid::SEC568::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-disconnect
</FONT></pre></td></tr></table></P><P>
Disconnect from the remote target. There's no output and the target is
generally not resumed.
</P><P>
<A NAME="SEC569"></A>
<H4> GDB Command </H4>
<!--docid::SEC569::-->
<P>
The corresponding GDB command is <SAMP>`disconnect'</SAMP>.
</P><P>
<A NAME="SEC570"></A>
<H4> Example </H4>
<!--docid::SEC570::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-target-disconnect
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC571"></A>
<H3> The <CODE>-target-download</CODE> Command </H3>
<!--docid::SEC571::-->
<P>
<A NAME="SEC572"></A>
<H4> Synopsis </H4>
<!--docid::SEC572::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-download
</FONT></pre></td></tr></table></P><P>
Loads the executable onto the remote target.
It prints out an update message every half second, which includes the fields:
</P><P>
<DL COMPACT>
<DT><SAMP>`section'</SAMP>
<DD>The name of the section.
<DT><SAMP>`section-sent'</SAMP>
<DD>The size of what has been sent so far for that section.
<DT><SAMP>`section-size'</SAMP>
<DD>The size of the section.
<DT><SAMP>`total-sent'</SAMP>
<DD>The total size of what was sent so far (the current and the previous sections).
<DT><SAMP>`total-size'</SAMP>
<DD>The size of the overall executable to download.
</DL>
<P>
Each message is sent as status record (see section <A HREF="gdb_25.html#SEC247">GDB/MI Output Syntax</A>).
</P><P>
In addition, it prints the name and size of the sections, as they are
downloaded. These messages include the following fields:
</P><P>
<DL COMPACT>
<DT><SAMP>`section'</SAMP>
<DD>The name of the section.
<DT><SAMP>`section-size'</SAMP>
<DD>The size of the section.
<DT><SAMP>`total-size'</SAMP>
<DD>The size of the overall executable to download.
</DL>
<P>
At the end, a summary is printed.
</P><P>
<A NAME="SEC573"></A>
<H4> GDB Command </H4>
<!--docid::SEC573::-->
<P>
The corresponding GDB command is <SAMP>`load'</SAMP>.
</P><P>
<A NAME="SEC574"></A>
<H4> Example </H4>
<!--docid::SEC574::-->
<P>
Note: each status message appears on a single line. Here the messages
have been broken down so that they can fit onto a page.
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-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"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC575"></A>
<H3> The <CODE>-target-exec-status</CODE> Command </H3>
<!--docid::SEC575::-->
<P>
<A NAME="SEC576"></A>
<H4> Synopsis </H4>
<!--docid::SEC576::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-exec-status
</FONT></pre></td></tr></table></P><P>
Provide information on the state of the target (whether it is running or
not, for instance).
</P><P>
<A NAME="SEC577"></A>
<H4> GDB Command </H4>
<!--docid::SEC577::-->
<P>
There's no equivalent GDB command.
</P><P>
<A NAME="SEC578"></A>
<H4> Example </H4>
<!--docid::SEC578::-->
N.A.
<P>
<A NAME="SEC579"></A>
<H3> The <CODE>-target-list-available-targets</CODE> Command </H3>
<!--docid::SEC579::-->
<P>
<A NAME="SEC580"></A>
<H4> Synopsis </H4>
<!--docid::SEC580::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-list-available-targets
</FONT></pre></td></tr></table></P><P>
List the possible targets to connect to.
</P><P>
<A NAME="SEC581"></A>
<H4> GDB Command </H4>
<!--docid::SEC581::-->
<P>
The corresponding GDB command is <SAMP>`help target'</SAMP>.
</P><P>
<A NAME="SEC582"></A>
<H4> Example </H4>
<!--docid::SEC582::-->
N.A.
<P>
<A NAME="SEC583"></A>
<H3> The <CODE>-target-list-current-targets</CODE> Command </H3>
<!--docid::SEC583::-->
<P>
<A NAME="SEC584"></A>
<H4> Synopsis </H4>
<!--docid::SEC584::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-list-current-targets
</FONT></pre></td></tr></table></P><P>
Describe the current target.
</P><P>
<A NAME="SEC585"></A>
<H4> GDB Command </H4>
<!--docid::SEC585::-->
<P>
The corresponding information is printed by <SAMP>`info file'</SAMP> (among
other things).
</P><P>
<A NAME="SEC586"></A>
<H4> Example </H4>
<!--docid::SEC586::-->
N.A.
<P>
<A NAME="SEC587"></A>
<H3> The <CODE>-target-list-parameters</CODE> Command </H3>
<!--docid::SEC587::-->
<P>
<A NAME="SEC588"></A>
<H4> Synopsis </H4>
<!--docid::SEC588::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-list-parameters
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC589"></A>
<H4> GDB Command </H4>
<!--docid::SEC589::-->
<P>
No equivalent.
</P><P>
<A NAME="SEC590"></A>
<H4> Example </H4>
<!--docid::SEC590::-->
N.A.
<P>
<A NAME="SEC591"></A>
<H3> The <CODE>-target-select</CODE> Command </H3>
<!--docid::SEC591::-->
<P>
<A NAME="SEC592"></A>
<H4> Synopsis </H4>
<!--docid::SEC592::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-select <VAR>type</VAR> <VAR>parameters <small>...</small></VAR>
</FONT></pre></td></tr></table></P><P>
Connect GDB to the remote target. This command takes two args:
</P><P>
<DL COMPACT>
<DT><SAMP>`<VAR>type</VAR>'</SAMP>
<DD>The type of target, for instance <SAMP>`async'</SAMP>, <SAMP>`remote'</SAMP>, etc.
<DT><SAMP>`<VAR>parameters</VAR>'</SAMP>
<DD>Device names, host names and the like. See section <A HREF="gdb_17.html#SEC160">Commands for Managing Targets</A>, for more details.
</DL>
<P>
The output is a connection notification, followed by the address at
which the target program is, in the following form:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>^connected,addr="<VAR>address</VAR>",func="<VAR>function name</VAR>",
args=[<VAR>arg list</VAR>]
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC593"></A>
<H4> GDB Command </H4>
<!--docid::SEC593::-->
<P>
The corresponding GDB command is <SAMP>`target'</SAMP>.
</P><P>
<A NAME="SEC594"></A>
<H4> Example </H4>
<!--docid::SEC594::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-target-select async /dev/ttya
^connected,addr="0xfe00a300",func="??",args=[]
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI File Transfer Commands"></A>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdb_abt.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<H2> 24.18 GDB/MI File Transfer Commands </H2>
<!--docid::SEC595::-->
<P>
<A NAME="SEC596"></A>
<H3> The <CODE>-target-file-put</CODE> Command </H3>
<!--docid::SEC596::-->
<P>
<A NAME="SEC597"></A>
<H4> Synopsis </H4>
<!--docid::SEC597::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-file-put <VAR>hostfile</VAR> <VAR>targetfile</VAR>
</FONT></pre></td></tr></table></P><P>
Copy file <VAR>hostfile</VAR> from the host system (the machine running
GDB) to <VAR>targetfile</VAR> on the target system.
</P><P>
<A NAME="SEC598"></A>
<H4> GDB Command </H4>
<!--docid::SEC598::-->
<P>
The corresponding GDB command is <SAMP>`remote put'</SAMP>.
</P><P>
<A NAME="SEC599"></A>
<H4> Example </H4>
<!--docid::SEC599::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-target-file-put localfile remotefile
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC600"></A>
<H3> The <CODE>-target-file-put</CODE> Command </H3>
<!--docid::SEC600::-->
<P>
<A NAME="SEC601"></A>
<H4> Synopsis </H4>
<!--docid::SEC601::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-file-get <VAR>targetfile</VAR> <VAR>hostfile</VAR>
</FONT></pre></td></tr></table></P><P>
Copy file <VAR>targetfile</VAR> from the target system to <VAR>hostfile</VAR>
on the host system.
</P><P>
<A NAME="SEC602"></A>
<H4> GDB Command </H4>
<!--docid::SEC602::-->
<P>
The corresponding GDB command is <SAMP>`remote get'</SAMP>.
</P><P>
<A NAME="SEC603"></A>
<H4> Example </H4>
<!--docid::SEC603::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-target-file-get remotefile localfile
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC604"></A>
<H3> The <CODE>-target-file-delete</CODE> Command </H3>
<!--docid::SEC604::-->
<P>
<A NAME="SEC605"></A>
<H4> Synopsis </H4>
<!--docid::SEC605::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -target-file-delete <VAR>targetfile</VAR>
</FONT></pre></td></tr></table></P><P>
Delete <VAR>targetfile</VAR> from the target system.
</P><P>
<A NAME="SEC606"></A>
<H4> GDB Command </H4>
<!--docid::SEC606::-->
<P>
The corresponding GDB command is <SAMP>`remote delete'</SAMP>.
</P><P>
<A NAME="SEC607"></A>
<H4> Example </H4>
<!--docid::SEC607::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-target-file-delete remotefile
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="GDB/MI Miscellaneous Commands"></A>
<HR SIZE="6">
<A NAME="SEC608"></A>
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<H2> 24.19 Miscellaneous GDB/MI Commands </H2>
<!--docid::SEC608::-->
<P>
<A NAME="SEC609"></A>
<H3> The <CODE>-gdb-exit</CODE> Command </H3>
<!--docid::SEC609::-->
<P>
<A NAME="SEC610"></A>
<H4> Synopsis </H4>
<!--docid::SEC610::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -gdb-exit
</FONT></pre></td></tr></table></P><P>
Exit GDB immediately.
</P><P>
<A NAME="SEC611"></A>
<H4> GDB Command </H4>
<!--docid::SEC611::-->
<P>
Approximately corresponds to <SAMP>`quit'</SAMP>.
</P><P>
<A NAME="SEC612"></A>
<H4> Example </H4>
<!--docid::SEC612::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-gdb-exit
^exit
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC613"></A>
<H3> The <CODE>-exec-abort</CODE> Command </H3>
<!--docid::SEC613::-->
<P>
<A NAME="SEC614"></A>
<H4> Synopsis </H4>
<!--docid::SEC614::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -exec-abort
</FONT></pre></td></tr></table></P><P>
Kill the inferior running program.
</P><P>
<A NAME="SEC615"></A>
<H4> GDB Command </H4>
<!--docid::SEC615::-->
<P>
The corresponding GDB command is <SAMP>`kill'</SAMP>.
</P><P>
<A NAME="SEC616"></A>
<H4> Example </H4>
<!--docid::SEC616::-->
N.A.
<P>
<A NAME="SEC617"></A>
<H3> The <CODE>-gdb-set</CODE> Command </H3>
<!--docid::SEC617::-->
<P>
<A NAME="SEC618"></A>
<H4> Synopsis </H4>
<!--docid::SEC618::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -gdb-set
</FONT></pre></td></tr></table></P><P>
Set an internal GDB variable.
</P><P>
<A NAME="SEC619"></A>
<H4> GDB Command </H4>
<!--docid::SEC619::-->
<P>
The corresponding GDB command is <SAMP>`set'</SAMP>.
</P><P>
<A NAME="SEC620"></A>
<H4> Example </H4>
<!--docid::SEC620::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-gdb-set $foo=3
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC621"></A>
<H3> The <CODE>-gdb-show</CODE> Command </H3>
<!--docid::SEC621::-->
<P>
<A NAME="SEC622"></A>
<H4> Synopsis </H4>
<!--docid::SEC622::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -gdb-show
</FONT></pre></td></tr></table></P><P>
Show the current value of a GDB variable.
</P><P>
<A NAME="SEC623"></A>
<H4> GDB Command </H4>
<!--docid::SEC623::-->
<P>
The corresponding GDB command is <SAMP>`show'</SAMP>.
</P><P>
<A NAME="SEC624"></A>
<H4> Example </H4>
<!--docid::SEC624::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-gdb-show annotate
^done,value="0"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC625"></A>
<H3> The <CODE>-gdb-version</CODE> Command </H3>
<!--docid::SEC625::-->
<P>
<A NAME="SEC626"></A>
<H4> Synopsis </H4>
<!--docid::SEC626::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre> -gdb-version
</FONT></pre></td></tr></table></P><P>
Show version information for GDB. Used mostly in testing.
</P><P>
<A NAME="SEC627"></A>
<H4> GDB Command </H4>
<!--docid::SEC627::-->
<P>
The GDB equivalent is <SAMP>`show version'</SAMP>. GDB by
default shows this information when you start an interactive session.
</P><P>
<A NAME="SEC628"></A>
<H4> Example </H4>
<!--docid::SEC628::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-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
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC629"></A>
<H3> The <CODE>-list-features</CODE> Command </H3>
<!--docid::SEC629::-->
<P>
Returns a list of particular features of the MI protocol that
this version of gdb implements. A feature can be a command,
or a new field in an output of some command, or even an
important bugfix. While a frontend can sometimes detect presence
of a feature at runtime, it is easier to perform detection at debugger
startup.
</P><P>
The command returns a list of strings, with each string naming an
available feature. Each returned string is just a name, it does not
have any internal structure. The list of possible feature names
is given below.
</P><P>
Example output:
</P><P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb) -list-features
^done,result=["feature1","feature2"]
</FONT></pre></td></tr></table></P><P>
The current list of features is:
</P><P>
<UL>
<LI>
<SAMP>`frozen-varobjs'</SAMP>---indicates presence of the
<CODE>-var-set-frozen</CODE> command, as well as possible presense of the
<CODE>frozen</CODE> field in the output of <CODE>-varobj-create</CODE>.
<LI>
<SAMP>`pending-breakpoints'</SAMP>---indicates presence of the <CODE>-f</CODE>
option to the <CODE>-break-insert</CODE> command.
<P>
</UL>
<P>
<A NAME="SEC630"></A>
<H3> The <CODE>-interpreter-exec</CODE> Command </H3>
<!--docid::SEC630::-->
<P>
<A NAME="SEC631"></A>
<H3> Synopsis </H3>
<!--docid::SEC631::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-interpreter-exec <VAR>interpreter</VAR> <VAR>command</VAR>
</FONT></pre></td></tr></table><A NAME="-interpreter-exec"></A>
</P><P>
Execute the specified <VAR>command</VAR> in the given <VAR>interpreter</VAR>.
</P><P>
<A NAME="SEC632"></A>
<H3> GDB Command </H3>
<!--docid::SEC632::-->
<P>
The corresponding GDB command is <SAMP>`interpreter-exec'</SAMP>.
</P><P>
<A NAME="SEC633"></A>
<H3> Example </H3>
<!--docid::SEC633::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-interpreter-exec console "break main"
&#38;"During symbol reading, couldn't parse type; debugger out of date?.\n"
&#38;"During symbol reading, bad structure-type format.\n"
~"Breakpoint 1 at 0x8074fc6: file ../../src/gdb/main.c, line 743.\n"
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC634"></A>
<H3> The <CODE>-inferior-tty-set</CODE> Command </H3>
<!--docid::SEC634::-->
<P>
<A NAME="SEC635"></A>
<H3> Synopsis </H3>
<!--docid::SEC635::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-inferior-tty-set /dev/pts/1
</FONT></pre></td></tr></table></P><P>
Set terminal for future runs of the program being debugged.
</P><P>
<A NAME="SEC636"></A>
<H3> GDB Command </H3>
<!--docid::SEC636::-->
<P>
The corresponding GDB command is <SAMP>`set inferior-tty'</SAMP> /dev/pts/1.
</P><P>
<A NAME="SEC637"></A>
<H3> Example </H3>
<!--docid::SEC637::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-inferior-tty-set /dev/pts/1
^done
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC638"></A>
<H3> The <CODE>-inferior-tty-show</CODE> Command </H3>
<!--docid::SEC638::-->
<P>
<A NAME="SEC639"></A>
<H3> Synopsis </H3>
<!--docid::SEC639::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-inferior-tty-show
</FONT></pre></td></tr></table></P><P>
Show terminal for future runs of program being debugged.
</P><P>
<A NAME="SEC640"></A>
<H3> GDB Command </H3>
<!--docid::SEC640::-->
<P>
The corresponding GDB command is <SAMP>`show inferior-tty'</SAMP>.
</P><P>
<A NAME="SEC641"></A>
<H3> Example </H3>
<!--docid::SEC641::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-inferior-tty-set /dev/pts/1
^done
(gdb)
-inferior-tty-show
^done,inferior_tty_terminal="/dev/pts/1"
(gdb)
</FONT></pre></td></tr></table></P><P>
<A NAME="SEC642"></A>
<H3> The <CODE>-enable-timings</CODE> Command </H3>
<!--docid::SEC642::-->
<P>
<A NAME="SEC643"></A>
<H3> Synopsis </H3>
<!--docid::SEC643::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>-enable-timings [yes | no]
</FONT></pre></td></tr></table></P><P>
Toggle the printing of the wallclock, user and system times for an MI
command as a field in its output. This command is to help frontend
developers optimize the performance of their code. No argument is
equivalent to <SAMP>`yes'</SAMP>.
</P><P>
<A NAME="SEC644"></A>
<H3> GDB Command </H3>
<!--docid::SEC644::-->
<P>
No equivalent.
</P><P>
<A NAME="SEC645"></A>
<H3> Example </H3>
<!--docid::SEC645::-->
<P>
<TABLE><tr><td>&nbsp;</td><td class=smallexample><FONT SIZE=-1><pre>(gdb)
-enable-timings
^done
(gdb)
-break-insert main
^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x080484ed",func="main",file="myprog.c",
fullname="/home/nickrob/myprog.c",line="73",times="0"},
time={wallclock="0.05185",user="0.00800",system="0.00000"}
(gdb)
-enable-timings no
^done
(gdb)
-exec-run
^running
(gdb)
*stopped,reason="breakpoint-hit",bkptno="1",thread-id="0",
frame={addr="0x080484ed",func="main",args=[{name="argc",value="1"},
{name="argv",value="0xbfb60364"}],file="myprog.c",
fullname="/home/nickrob/myprog.c",line="73"}
(gdb)
</FONT></pre></td></tr></table></P><P>
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