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<a name="GDB_002fMI-Miscellaneous-Commands"></a>
<div class="header">
<p>
Previous: <a href="GDB_002fMI-Support-Commands.html#GDB_002fMI-Support-Commands" accesskey="p" rel="prev">GDB/MI Support Commands</a>, Up: <a href="GDB_002fMI.html#GDB_002fMI" accesskey="u" rel="up">GDB/MI</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Miscellaneous-GDB_002fMI-Commands"></a>
<h3 class="section">27.24 Miscellaneous <small>GDB/MI</small> Commands</h3>
<a name="The-_002dgdb_002dexit-Command"></a>
<h4 class="subheading">The <code>-gdb-exit</code> Command</h4>
<a name="index-_002dgdb_002dexit"></a>
<a name="Synopsis-95"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -gdb-exit
</pre></div>
<p>Exit <small>GDB</small> immediately.
</p>
<a name="GDB-Command-77"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>Approximately corresponds to &lsquo;<samp>quit</samp>&rsquo;.
</p>
<a name="Example-77"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-gdb-exit
^exit
</pre></div>
<a name="The-_002dgdb_002dset-Command"></a>
<h4 class="subheading">The <code>-gdb-set</code> Command</h4>
<a name="index-_002dgdb_002dset"></a>
<a name="Synopsis-96"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -gdb-set
</pre></div>
<p>Set an internal <small>GDB</small> variable.
</p>
<a name="GDB-Command-78"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> command is &lsquo;<samp>set</samp>&rsquo;.
</p>
<a name="Example-78"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-gdb-set $foo=3
^done
(gdb)
</pre></div>
<a name="The-_002dgdb_002dshow-Command"></a>
<h4 class="subheading">The <code>-gdb-show</code> Command</h4>
<a name="index-_002dgdb_002dshow"></a>
<a name="Synopsis-97"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -gdb-show
</pre></div>
<p>Show the current value of a <small>GDB</small> variable.
</p>
<a name="GDB-Command-79"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> command is &lsquo;<samp>show</samp>&rsquo;.
</p>
<a name="Example-79"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-gdb-show annotate
^done,value=&quot;0&quot;
(gdb)
</pre></div>
<a name="The-_002dgdb_002dversion-Command"></a>
<h4 class="subheading">The <code>-gdb-version</code> Command</h4>
<a name="index-_002dgdb_002dversion"></a>
<a name="Synopsis-98"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -gdb-version
</pre></div>
<p>Show version information for <small>GDB</small>. Used mostly in testing.
</p>
<a name="GDB-Command-80"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>The <small>GDB</small> equivalent is &lsquo;<samp>show version</samp>&rsquo;. <small>GDB</small> by
default shows this information when you start an interactive session.
</p>
<a name="Example-80"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(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 &quot;show copying&quot; to see the conditions.
~There is absolutely no warranty for GDB. Type &quot;show warranty&quot; for
~ details.
~This GDB was configured as
&quot;--host=sparc-sun-solaris2.5.1 --target=ppc-eabi&quot;.
^done
(gdb)
</pre></div>
<a name="The-_002dlist_002dthread_002dgroups-Command"></a>
<h4 class="subheading">The <code>-list-thread-groups</code> Command</h4>
<a name="index-_002dlist_002dthread_002dgroups"></a>
<a name="Synopsis-99"></a>
<h4 class="subheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample">-list-thread-groups [ --available ] [ --recurse 1 ] [ <var>group</var> ... ]
</pre></div>
<p>Lists thread groups (see <a href="Thread-groups.html#Thread-groups">Thread groups</a>). When a single thread
group is passed as the argument, lists the children of that group.
When several thread group are passed, lists information about those
thread groups. Without any parameters, lists information about all
top-level thread groups.
</p>
<p>Normally, thread groups that are being debugged are reported.
With the &lsquo;<samp>--available</samp>&rsquo; option, <small>GDB</small> reports thread groups
available on the target.
</p>
<p>The output of this command may have either a &lsquo;<samp>threads</samp>&rsquo; result or
a &lsquo;<samp>groups</samp>&rsquo; result. The &lsquo;<samp>thread</samp>&rsquo; result has a list of tuples
as value, with each tuple describing a thread (see <a href="GDB_002fMI-Thread-Information.html#GDB_002fMI-Thread-Information">GDB/MI Thread Information</a>). The &lsquo;<samp>groups</samp>&rsquo; result has a list of tuples as value,
each tuple describing a thread group. If top-level groups are
requested (that is, no parameter is passed), or when several groups
are passed, the output always has a &lsquo;<samp>groups</samp>&rsquo; result. The format
of the &lsquo;<samp>group</samp>&rsquo; result is described below.
</p>
<p>To reduce the number of roundtrips it&rsquo;s possible to list thread groups
together with their children, by passing the &lsquo;<samp>--recurse</samp>&rsquo; option
and the recursion depth. Presently, only recursion depth of 1 is
permitted. If this option is present, then every reported thread group
will also include its children, either as &lsquo;<samp>group</samp>&rsquo; or
&lsquo;<samp>threads</samp>&rsquo; field.
</p>
<p>In general, any combination of option and parameters is permitted, with
the following caveats:
</p>
<ul>
<li> When a single thread group is passed, the output will typically
be the &lsquo;<samp>threads</samp>&rsquo; result. Because threads may not contain
anything, the &lsquo;<samp>recurse</samp>&rsquo; option will be ignored.
</li><li> When the &lsquo;<samp>--available</samp>&rsquo; option is passed, limited information may
be available. In particular, the list of threads of a process might
be inaccessible. Further, specifying specific thread groups might
not give any performance advantage over listing all thread groups.
The frontend should assume that &lsquo;<samp>-list-thread-groups --available</samp>&rsquo;
is always an expensive operation and cache the results.
</li></ul>
<p>The &lsquo;<samp>groups</samp>&rsquo; result is a list of tuples, where each tuple may
have the following fields:
</p>
<dl compact="compact">
<dt><code>id</code></dt>
<dd><p>Identifier of the thread group. This field is always present.
The identifier is an opaque string; frontends should not try to
convert it to an integer, even though it might look like one.
</p>
</dd>
<dt><code>type</code></dt>
<dd><p>The type of the thread group. At present, only &lsquo;<samp>process</samp>&rsquo; is a
valid type.
</p>
</dd>
<dt><code>pid</code></dt>
<dd><p>The target-specific process identifier. This field is only present
for thread groups of type &lsquo;<samp>process</samp>&rsquo; and only if the process exists.
</p>
</dd>
<dt><code>exit-code</code></dt>
<dd><p>The exit code of this group&rsquo;s last exited thread, formatted in octal.
This field is only present for thread groups of type &lsquo;<samp>process</samp>&rsquo; and
only if the process is not running.
</p>
</dd>
<dt><code>num_children</code></dt>
<dd><p>The number of children this thread group has. This field may be
absent for an available thread group.
</p>
</dd>
<dt><code>threads</code></dt>
<dd><p>This field has a list of tuples as value, each tuple describing a
thread. It may be present if the &lsquo;<samp>--recurse</samp>&rsquo; option is
specified, and it&rsquo;s actually possible to obtain the threads.
</p>
</dd>
<dt><code>cores</code></dt>
<dd><p>This field is a list of integers, each identifying a core that one
thread of the group is running on. This field may be absent if
such information is not available.
</p>
</dd>
<dt><code>executable</code></dt>
<dd><p>The name of the executable file that corresponds to this thread group.
The field is only present for thread groups of type &lsquo;<samp>process</samp>&rsquo;,
and only if there is a corresponding executable file.
</p>
</dd>
</dl>
<a name="Example-81"></a>
<h4 class="subheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">gdb
-list-thread-groups
^done,groups=[{id=&quot;17&quot;,type=&quot;process&quot;,pid=&quot;yyy&quot;,num_children=&quot;2&quot;}]
-list-thread-groups 17
^done,threads=[{id=&quot;2&quot;,target-id=&quot;Thread 0xb7e14b90 (LWP 21257)&quot;,
frame={level=&quot;0&quot;,addr=&quot;0xffffe410&quot;,func=&quot;__kernel_vsyscall&quot;,args=[]},state=&quot;running&quot;},
{id=&quot;1&quot;,target-id=&quot;Thread 0xb7e156b0 (LWP 21254)&quot;,
frame={level=&quot;0&quot;,addr=&quot;0x0804891f&quot;,func=&quot;foo&quot;,args=[{name=&quot;i&quot;,value=&quot;10&quot;}],
file=&quot;/tmp/a.c&quot;,fullname=&quot;/tmp/a.c&quot;,line=&quot;158&quot;,arch=&quot;i386:x86_64&quot;},state=&quot;running&quot;}]]
-list-thread-groups --available
^done,groups=[{id=&quot;17&quot;,type=&quot;process&quot;,pid=&quot;yyy&quot;,num_children=&quot;2&quot;,cores=[1,2]}]
-list-thread-groups --available --recurse 1
^done,groups=[{id=&quot;17&quot;, types=&quot;process&quot;,pid=&quot;yyy&quot;,num_children=&quot;2&quot;,cores=[1,2],
threads=[{id=&quot;1&quot;,target-id=&quot;Thread 0xb7e14b90&quot;,cores=[1]},
{id=&quot;2&quot;,target-id=&quot;Thread 0xb7e14b90&quot;,cores=[2]}]},..]
-list-thread-groups --available --recurse 1 17 18
^done,groups=[{id=&quot;17&quot;, types=&quot;process&quot;,pid=&quot;yyy&quot;,num_children=&quot;2&quot;,cores=[1,2],
threads=[{id=&quot;1&quot;,target-id=&quot;Thread 0xb7e14b90&quot;,cores=[1]},
{id=&quot;2&quot;,target-id=&quot;Thread 0xb7e14b90&quot;,cores=[2]}]},...]
</pre></div>
<a name="The-_002dinfo_002dos-Command"></a>
<h4 class="subheading">The <code>-info-os</code> Command</h4>
<a name="index-_002dinfo_002dos"></a>
<a name="Synopsis-100"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample">-info-os [ <var>type</var> ]
</pre></div>
<p>If no argument is supplied, the command returns a table of available
operating-system-specific information types. If one of these types is
supplied as an argument <var>type</var>, then the command returns a table
of data of that type.
</p>
<p>The types of information available depend on the target operating
system.
</p>
<a name="GDB-Command-81"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> command is &lsquo;<samp>info os</samp>&rsquo;.
</p>
<a name="Example-82"></a>
<h4 class="subsubheading">Example</h4>
<p>When run on a <small>GNU</small>/Linux system, the output will look something
like this:
</p>
<div class="smallexample">
<pre class="smallexample">gdb
-info-os
^done,OSDataTable={nr_rows=&quot;10&quot;,nr_cols=&quot;3&quot;,
hdr=[{width=&quot;10&quot;,alignment=&quot;-1&quot;,col_name=&quot;col0&quot;,colhdr=&quot;Type&quot;},
{width=&quot;10&quot;,alignment=&quot;-1&quot;,col_name=&quot;col1&quot;,colhdr=&quot;Description&quot;},
{width=&quot;10&quot;,alignment=&quot;-1&quot;,col_name=&quot;col2&quot;,colhdr=&quot;Title&quot;}],
body=[item={col0=&quot;cpus&quot;,col1=&quot;Listing of all cpus/cores on the system&quot;,
col2=&quot;CPUs&quot;},
item={col0=&quot;files&quot;,col1=&quot;Listing of all file descriptors&quot;,
col2=&quot;File descriptors&quot;},
item={col0=&quot;modules&quot;,col1=&quot;Listing of all loaded kernel modules&quot;,
col2=&quot;Kernel modules&quot;},
item={col0=&quot;msg&quot;,col1=&quot;Listing of all message queues&quot;,
col2=&quot;Message queues&quot;},
item={col0=&quot;processes&quot;,col1=&quot;Listing of all processes&quot;,
col2=&quot;Processes&quot;},
item={col0=&quot;procgroups&quot;,col1=&quot;Listing of all process groups&quot;,
col2=&quot;Process groups&quot;},
item={col0=&quot;semaphores&quot;,col1=&quot;Listing of all semaphores&quot;,
col2=&quot;Semaphores&quot;},
item={col0=&quot;shm&quot;,col1=&quot;Listing of all shared-memory regions&quot;,
col2=&quot;Shared-memory regions&quot;},
item={col0=&quot;sockets&quot;,col1=&quot;Listing of all internet-domain sockets&quot;,
col2=&quot;Sockets&quot;},
item={col0=&quot;threads&quot;,col1=&quot;Listing of all threads&quot;,
col2=&quot;Threads&quot;}]
gdb
-info-os processes
^done,OSDataTable={nr_rows=&quot;190&quot;,nr_cols=&quot;4&quot;,
hdr=[{width=&quot;10&quot;,alignment=&quot;-1&quot;,col_name=&quot;col0&quot;,colhdr=&quot;pid&quot;},
{width=&quot;10&quot;,alignment=&quot;-1&quot;,col_name=&quot;col1&quot;,colhdr=&quot;user&quot;},
{width=&quot;10&quot;,alignment=&quot;-1&quot;,col_name=&quot;col2&quot;,colhdr=&quot;command&quot;},
{width=&quot;10&quot;,alignment=&quot;-1&quot;,col_name=&quot;col3&quot;,colhdr=&quot;cores&quot;}],
body=[item={col0=&quot;1&quot;,col1=&quot;root&quot;,col2=&quot;/sbin/init&quot;,col3=&quot;0&quot;},
item={col0=&quot;2&quot;,col1=&quot;root&quot;,col2=&quot;[kthreadd]&quot;,col3=&quot;1&quot;},
item={col0=&quot;3&quot;,col1=&quot;root&quot;,col2=&quot;[ksoftirqd/0]&quot;,col3=&quot;0&quot;},
...
item={col0=&quot;26446&quot;,col1=&quot;stan&quot;,col2=&quot;bash&quot;,col3=&quot;0&quot;},
item={col0=&quot;28152&quot;,col1=&quot;stan&quot;,col2=&quot;bash&quot;,col3=&quot;1&quot;}]}
(gdb)
</pre></div>
<p>(Note that the MI output here includes a <code>&quot;Title&quot;</code> column that
does not appear in command-line <code>info os</code>; this column is useful
for MI clients that want to enumerate the types of data, such as in a
popup menu, but is needless clutter on the command line, and
<code>info os</code> omits it.)
</p>
<a name="The-_002dadd_002dinferior-Command"></a>
<h4 class="subheading">The <code>-add-inferior</code> Command</h4>
<a name="index-_002dadd_002dinferior"></a>
<a name="Synopsis-101"></a>
<h4 class="subheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample">-add-inferior
</pre></div>
<p>Creates a new inferior (see <a href="Inferiors-and-Programs.html#Inferiors-and-Programs">Inferiors and Programs</a>). The created
inferior is not associated with any executable. Such association may
be established with the &lsquo;<samp>-file-exec-and-symbols</samp>&rsquo; command
(see <a href="GDB_002fMI-File-Commands.html#GDB_002fMI-File-Commands">GDB/MI File Commands</a>). The command response has a single
field, &lsquo;<samp>inferior</samp>&rsquo;, whose value is the identifier of the
thread group corresponding to the new inferior.
</p>
<a name="Example-83"></a>
<h4 class="subheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">gdb
-add-inferior
^done,inferior=&quot;i3&quot;
</pre></div>
<a name="The-_002dinterpreter_002dexec-Command"></a>
<h4 class="subheading">The <code>-interpreter-exec</code> Command</h4>
<a name="index-_002dinterpreter_002dexec"></a>
<a name="Synopsis-102"></a>
<h4 class="subheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample">-interpreter-exec <var>interpreter</var> <var>command</var>
</pre></div>
<a name="g_t_002dinterpreter_002dexec"></a>
<p>Execute the specified <var>command</var> in the given <var>interpreter</var>.
</p>
<a name="GDB-Command-82"></a>
<h4 class="subheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> command is &lsquo;<samp>interpreter-exec</samp>&rsquo;.
</p>
<a name="Example-84"></a>
<h4 class="subheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-interpreter-exec console &quot;break main&quot;
&amp;&quot;During symbol reading, couldn't parse type; debugger out of date?.\n&quot;
&amp;&quot;During symbol reading, bad structure-type format.\n&quot;
~&quot;Breakpoint 1 at 0x8074fc6: file ../../src/gdb/main.c, line 743.\n&quot;
^done
(gdb)
</pre></div>
<a name="The-_002dinferior_002dtty_002dset-Command"></a>
<h4 class="subheading">The <code>-inferior-tty-set</code> Command</h4>
<a name="index-_002dinferior_002dtty_002dset"></a>
<a name="Synopsis-103"></a>
<h4 class="subheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample">-inferior-tty-set /dev/pts/1
</pre></div>
<p>Set terminal for future runs of the program being debugged.
</p>
<a name="GDB-Command-83"></a>
<h4 class="subheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> command is &lsquo;<samp>set inferior-tty</samp>&rsquo; /dev/pts/1.
</p>
<a name="Example-85"></a>
<h4 class="subheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-inferior-tty-set /dev/pts/1
^done
(gdb)
</pre></div>
<a name="The-_002dinferior_002dtty_002dshow-Command"></a>
<h4 class="subheading">The <code>-inferior-tty-show</code> Command</h4>
<a name="index-_002dinferior_002dtty_002dshow"></a>
<a name="Synopsis-104"></a>
<h4 class="subheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample">-inferior-tty-show
</pre></div>
<p>Show terminal for future runs of program being debugged.
</p>
<a name="GDB-Command-84"></a>
<h4 class="subheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> command is &lsquo;<samp>show inferior-tty</samp>&rsquo;.
</p>
<a name="Example-86"></a>
<h4 class="subheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-inferior-tty-set /dev/pts/1
^done
(gdb)
-inferior-tty-show
^done,inferior_tty_terminal=&quot;/dev/pts/1&quot;
(gdb)
</pre></div>
<a name="The-_002denable_002dtimings-Command"></a>
<h4 class="subheading">The <code>-enable-timings</code> Command</h4>
<a name="index-_002denable_002dtimings"></a>
<a name="Synopsis-105"></a>
<h4 class="subheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample">-enable-timings [yes | no]
</pre></div>
<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 &lsquo;<samp>yes</samp>&rsquo;.
</p>
<a name="GDB-Command-85"></a>
<h4 class="subheading"><small>GDB</small> Command</h4>
<p>No equivalent.
</p>
<a name="Example-87"></a>
<h4 class="subheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-enable-timings
^done
(gdb)
-break-insert main
^done,bkpt={number=&quot;1&quot;,type=&quot;breakpoint&quot;,disp=&quot;keep&quot;,enabled=&quot;y&quot;,
addr=&quot;0x080484ed&quot;,func=&quot;main&quot;,file=&quot;myprog.c&quot;,
fullname=&quot;/home/nickrob/myprog.c&quot;,line=&quot;73&quot;,thread-groups=[&quot;i1&quot;],
times=&quot;0&quot;},
time={wallclock=&quot;0.05185&quot;,user=&quot;0.00800&quot;,system=&quot;0.00000&quot;}
(gdb)
-enable-timings no
^done
(gdb)
-exec-run
^running
(gdb)
*stopped,reason=&quot;breakpoint-hit&quot;,disp=&quot;keep&quot;,bkptno=&quot;1&quot;,thread-id=&quot;0&quot;,
frame={addr=&quot;0x080484ed&quot;,func=&quot;main&quot;,args=[{name=&quot;argc&quot;,value=&quot;1&quot;},
{name=&quot;argv&quot;,value=&quot;0xbfb60364&quot;}],file=&quot;myprog.c&quot;,
fullname=&quot;/home/nickrob/myprog.c&quot;,line=&quot;73&quot;,arch=&quot;i386:x86_64&quot;}
(gdb)
</pre></div>
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