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<a name="GDB_002fMI-Stack-Manipulation"></a>
<div class="header">
<p>
Next: <a href="GDB_002fMI-Variable-Objects.html#GDB_002fMI-Variable-Objects" accesskey="n" rel="next">GDB/MI Variable Objects</a>, Previous: <a href="GDB_002fMI-Program-Execution.html#GDB_002fMI-Program-Execution" accesskey="p" rel="prev">GDB/MI Program Execution</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="GDB_002fMI-Stack-Manipulation-Commands"></a>
<h3 class="section">27.14 <small>GDB/MI</small> Stack Manipulation Commands</h3>
<a name="The-_002denable_002dframe_002dfilters-Command"></a>
<h4 class="subheading">The <code>-enable-frame-filters</code> Command</h4>
<a name="index-_002denable_002dframe_002dfilters"></a>
<div class="smallexample">
<pre class="smallexample">-enable-frame-filters
</pre></div>
<p><small>GDB</small> allows Python-based frame filters to affect the output of
the MI commands relating to stack traces. As there is no way to
implement this in a fully backward-compatible way, a front end must
request that this functionality be enabled.
</p>
<p>Once enabled, this feature cannot be disabled.
</p>
<p>Note that if Python support has not been compiled into <small>GDB</small>,
this command will still succeed (and do nothing).
</p>
<a name="The-_002dstack_002dinfo_002dframe-Command"></a>
<h4 class="subheading">The <code>-stack-info-frame</code> Command</h4>
<a name="index-_002dstack_002dinfo_002dframe"></a>
<a name="Synopsis-38"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -stack-info-frame
</pre></div>
<p>Get info on the selected frame.
</p>
<a name="GDB-Command-37"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> command is &lsquo;<samp>info frame</samp>&rsquo; or &lsquo;<samp>frame</samp>&rsquo;
(without arguments).
</p>
<a name="Example-36"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-info-frame
^done,frame={level=&quot;1&quot;,addr=&quot;0x0001076c&quot;,func=&quot;callee3&quot;,
file=&quot;../../../devo/gdb/testsuite/gdb.mi/basics.c&quot;,
fullname=&quot;/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c&quot;,line=&quot;17&quot;,
arch=&quot;i386:x86_64&quot;}
(gdb)
</pre></div>
<a name="The-_002dstack_002dinfo_002ddepth-Command"></a>
<h4 class="subheading">The <code>-stack-info-depth</code> Command</h4>
<a name="index-_002dstack_002dinfo_002ddepth"></a>
<a name="Synopsis-39"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -stack-info-depth [ <var>max-depth</var> ]
</pre></div>
<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>
<a name="GDB-Command-38"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>There&rsquo;s no equivalent <small>GDB</small> command.
</p>
<a name="Example-37"></a>
<h4 class="subsubheading">Example</h4>
<p>For a stack with frame levels 0 through 11:
</p>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-info-depth
^done,depth=&quot;12&quot;
(gdb)
-stack-info-depth 4
^done,depth=&quot;4&quot;
(gdb)
-stack-info-depth 12
^done,depth=&quot;12&quot;
(gdb)
-stack-info-depth 11
^done,depth=&quot;11&quot;
(gdb)
-stack-info-depth 13
^done,depth=&quot;12&quot;
(gdb)
</pre></div>
<a name="g_t_002dstack_002dlist_002darguments"></a><a name="The-_002dstack_002dlist_002darguments-Command"></a>
<h4 class="subheading">The <code>-stack-list-arguments</code> Command</h4>
<a name="index-_002dstack_002dlist_002darguments"></a>
<a name="Synopsis-40"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -stack-list-arguments [ --no-frame-filters ] [ --skip-unavailable ] <var>print-values</var>
[ <var>low-frame</var> <var>high-frame</var> ]
</pre></div>
<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>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. If the option <code>--no-frame-filters</code> is
supplied, then Python frame filters will not be executed.
</p>
<p>If the <code>--skip-unavailable</code> option is specified, arguments that
are not available are not listed. Partially available arguments
are still displayed, however.
</p>
<p>Use of this command to obtain arguments in a single frame is
deprecated in favor of the &lsquo;<samp>-stack-list-variables</samp>&rsquo; command.
</p>
<a name="GDB-Command-39"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p><small>GDB</small> does not have an equivalent command. <code>gdbtk</code> has a
&lsquo;<samp>gdb_get_args</samp>&rsquo; command which partially overlaps with the
functionality of &lsquo;<samp>-stack-list-arguments</samp>&rsquo;.
</p>
<a name="Example-38"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-list-frames
^done,
stack=[
frame={level=&quot;0&quot;,addr=&quot;0x00010734&quot;,func=&quot;callee4&quot;,
file=&quot;../../../devo/gdb/testsuite/gdb.mi/basics.c&quot;,
fullname=&quot;/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c&quot;,line=&quot;8&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;1&quot;,addr=&quot;0x0001076c&quot;,func=&quot;callee3&quot;,
file=&quot;../../../devo/gdb/testsuite/gdb.mi/basics.c&quot;,
fullname=&quot;/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c&quot;,line=&quot;17&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;2&quot;,addr=&quot;0x0001078c&quot;,func=&quot;callee2&quot;,
file=&quot;../../../devo/gdb/testsuite/gdb.mi/basics.c&quot;,
fullname=&quot;/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c&quot;,line=&quot;22&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;3&quot;,addr=&quot;0x000107b4&quot;,func=&quot;callee1&quot;,
file=&quot;../../../devo/gdb/testsuite/gdb.mi/basics.c&quot;,
fullname=&quot;/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c&quot;,line=&quot;27&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;4&quot;,addr=&quot;0x000107e0&quot;,func=&quot;main&quot;,
file=&quot;../../../devo/gdb/testsuite/gdb.mi/basics.c&quot;,
fullname=&quot;/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c&quot;,line=&quot;32&quot;,
arch=&quot;i386:x86_64&quot;}]
(gdb)
-stack-list-arguments 0
^done,
stack-args=[
frame={level=&quot;0&quot;,args=[]},
frame={level=&quot;1&quot;,args=[name=&quot;strarg&quot;]},
frame={level=&quot;2&quot;,args=[name=&quot;intarg&quot;,name=&quot;strarg&quot;]},
frame={level=&quot;3&quot;,args=[name=&quot;intarg&quot;,name=&quot;strarg&quot;,name=&quot;fltarg&quot;]},
frame={level=&quot;4&quot;,args=[]}]
(gdb)
-stack-list-arguments 1
^done,
stack-args=[
frame={level=&quot;0&quot;,args=[]},
frame={level=&quot;1&quot;,
args=[{name=&quot;strarg&quot;,value=&quot;0x11940 \&quot;A string argument.\&quot;&quot;}]},
frame={level=&quot;2&quot;,args=[
{name=&quot;intarg&quot;,value=&quot;2&quot;},
{name=&quot;strarg&quot;,value=&quot;0x11940 \&quot;A string argument.\&quot;&quot;}]},
{frame={level=&quot;3&quot;,args=[
{name=&quot;intarg&quot;,value=&quot;2&quot;},
{name=&quot;strarg&quot;,value=&quot;0x11940 \&quot;A string argument.\&quot;&quot;},
{name=&quot;fltarg&quot;,value=&quot;3.5&quot;}]},
frame={level=&quot;4&quot;,args=[]}]
(gdb)
-stack-list-arguments 0 2 2
^done,stack-args=[frame={level=&quot;2&quot;,args=[name=&quot;intarg&quot;,name=&quot;strarg&quot;]}]
(gdb)
-stack-list-arguments 1 2 2
^done,stack-args=[frame={level=&quot;2&quot;,
args=[{name=&quot;intarg&quot;,value=&quot;2&quot;},
{name=&quot;strarg&quot;,value=&quot;0x11940 \&quot;A string argument.\&quot;&quot;}]}]
(gdb)
</pre></div>
<a name="g_t_002dstack_002dlist_002dframes"></a><a name="The-_002dstack_002dlist_002dframes-Command"></a>
<h4 class="subheading">The <code>-stack-list-frames</code> Command</h4>
<a name="index-_002dstack_002dlist_002dframes"></a>
<a name="Synopsis-41"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -stack-list-frames [ --no-frame-filters <var>low-frame</var> <var>high-frame</var> ]
</pre></div>
<p>List the frames currently on the stack. For each frame it displays the
following info:
</p>
<dl compact="compact">
<dt>&lsquo;<samp><var>level</var></samp>&rsquo;</dt>
<dd><p>The frame number, 0 being the topmost frame, i.e., the innermost function.
</p></dd>
<dt>&lsquo;<samp><var>addr</var></samp>&rsquo;</dt>
<dd><p>The <code>$pc</code> value for that frame.
</p></dd>
<dt>&lsquo;<samp><var>func</var></samp>&rsquo;</dt>
<dd><p>Function name.
</p></dd>
<dt>&lsquo;<samp><var>file</var></samp>&rsquo;</dt>
<dd><p>File name of the source file where the function lives.
</p></dd>
<dt>&lsquo;<samp><var>fullname</var></samp>&rsquo;</dt>
<dd><p>The full file name of the source file where the function lives.
</p></dd>
<dt>&lsquo;<samp><var>line</var></samp>&rsquo;</dt>
<dd><p>Line number corresponding to the <code>$pc</code>.
</p></dd>
<dt>&lsquo;<samp><var>from</var></samp>&rsquo;</dt>
<dd><p>The shared library where this function is defined. This is only given
if the frame&rsquo;s function is not known.
</p></dd>
<dt>&lsquo;<samp><var>arch</var></samp>&rsquo;</dt>
<dd><p>Frame&rsquo;s architecture.
</p></dd>
</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. If the option <code>--no-frame-filters</code> is supplied, then
Python frame filters will not be executed.
</p>
<a name="GDB-Command-40"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> commands are &lsquo;<samp>backtrace</samp>&rsquo; and &lsquo;<samp>where</samp>&rsquo;.
</p>
<a name="Example-39"></a>
<h4 class="subsubheading">Example</h4>
<p>Full stack backtrace:
</p>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-list-frames
^done,stack=
[frame={level=&quot;0&quot;,addr=&quot;0x0001076c&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;11&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;1&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;2&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;3&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;4&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;5&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;6&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;7&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;8&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;9&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;10&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;11&quot;,addr=&quot;0x00010738&quot;,func=&quot;main&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;4&quot;,
arch=&quot;i386:x86_64&quot;}]
(gdb)
</pre></div>
<p>Show frames between <var>low_frame</var> and <var>high_frame</var>:
</p>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-list-frames 3 5
^done,stack=
[frame={level=&quot;3&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;4&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;},
frame={level=&quot;5&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;}]
(gdb)
</pre></div>
<p>Show a single frame:
</p>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-list-frames 3 3
^done,stack=
[frame={level=&quot;3&quot;,addr=&quot;0x000107a4&quot;,func=&quot;foo&quot;,
file=&quot;recursive2.c&quot;,fullname=&quot;/home/foo/bar/recursive2.c&quot;,line=&quot;14&quot;,
arch=&quot;i386:x86_64&quot;}]
(gdb)
</pre></div>
<a name="The-_002dstack_002dlist_002dlocals-Command"></a>
<h4 class="subheading">The <code>-stack-list-locals</code> Command</h4>
<a name="index-_002dstack_002dlist_002dlocals"></a>
<a name="g_t_002dstack_002dlist_002dlocals"></a>
<a name="Synopsis-42"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -stack-list-locals [ --no-frame-filters ] [ --skip-unavailable ] <var>print-values</var>
</pre></div>
<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. If the option <code>--no-frame-filters</code> is supplied, then
Python frame filters will not be executed.
</p>
<p>If the <code>--skip-unavailable</code> option is specified, local variables
that are not available are not listed. Partially available local
variables are still displayed, however.
</p>
<p>This command is deprecated in favor of the
&lsquo;<samp>-stack-list-variables</samp>&rsquo; command.
</p>
<a name="GDB-Command-41"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>&lsquo;<samp>info locals</samp>&rsquo; in <small>GDB</small>, &lsquo;<samp>gdb_get_locals</samp>&rsquo; in <code>gdbtk</code>.
</p>
<a name="Example-40"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-list-locals 0
^done,locals=[name=&quot;A&quot;,name=&quot;B&quot;,name=&quot;C&quot;]
(gdb)
-stack-list-locals --all-values
^done,locals=[{name=&quot;A&quot;,value=&quot;1&quot;},{name=&quot;B&quot;,value=&quot;2&quot;},
{name=&quot;C&quot;,value=&quot;{1, 2, 3}&quot;}]
-stack-list-locals --simple-values
^done,locals=[{name=&quot;A&quot;,type=&quot;int&quot;,value=&quot;1&quot;},
{name=&quot;B&quot;,type=&quot;int&quot;,value=&quot;2&quot;},{name=&quot;C&quot;,type=&quot;int [3]&quot;}]
(gdb)
</pre></div>
<a name="g_t_002dstack_002dlist_002dvariables"></a><a name="The-_002dstack_002dlist_002dvariables-Command"></a>
<h4 class="subheading">The <code>-stack-list-variables</code> Command</h4>
<a name="index-_002dstack_002dlist_002dvariables"></a>
<a name="Synopsis-43"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -stack-list-variables [ --no-frame-filters ] [ --skip-unavailable ] <var>print-values</var>
</pre></div>
<p>Display the names of local variables and function arguments 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. If the option <code>--no-frame-filters</code> is
supplied, then Python frame filters will not be executed.
</p>
<p>If the <code>--skip-unavailable</code> option is specified, local variables
and arguments that are not available are not listed. Partially
available arguments and local variables are still displayed, however.
</p>
<a name="Example-41"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-list-variables --thread 1 --frame 0 --all-values
^done,variables=[{name=&quot;x&quot;,value=&quot;11&quot;},{name=&quot;s&quot;,value=&quot;{a = 1, b = 2}&quot;}]
(gdb)
</pre></div>
<a name="The-_002dstack_002dselect_002dframe-Command"></a>
<h4 class="subheading">The <code>-stack-select-frame</code> Command</h4>
<a name="index-_002dstack_002dselect_002dframe"></a>
<a name="Synopsis-44"></a>
<h4 class="subsubheading">Synopsis</h4>
<div class="smallexample">
<pre class="smallexample"> -stack-select-frame <var>framenum</var>
</pre></div>
<p>Change the selected frame. Select a different frame <var>framenum</var> on
the stack.
</p>
<p>This command in deprecated in favor of passing the &lsquo;<samp>--frame</samp>&rsquo;
option to every command.
</p>
<a name="GDB-Command-42"></a>
<h4 class="subsubheading"><small>GDB</small> Command</h4>
<p>The corresponding <small>GDB</small> commands are &lsquo;<samp>frame</samp>&rsquo;, &lsquo;<samp>up</samp>&rsquo;,
&lsquo;<samp>down</samp>&rsquo;, &lsquo;<samp>select-frame</samp>&rsquo;, &lsquo;<samp>up-silent</samp>&rsquo;, and &lsquo;<samp>down-silent</samp>&rsquo;.
</p>
<a name="Example-42"></a>
<h4 class="subsubheading">Example</h4>
<div class="smallexample">
<pre class="smallexample">(gdb)
-stack-select-frame 2
^done
(gdb)
</pre></div>
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