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<title>Using JIT Debug Info Readers (Debugging with GDB)</title>
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<a name="Using-JIT-Debug-Info-Readers"></a>
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Next: <a href="Writing-JIT-Debug-Info-Readers.html#Writing-JIT-Debug-Info-Readers" accesskey="n" rel="next">Writing JIT Debug Info Readers</a>, Up: <a href="Custom-Debug-Info.html#Custom-Debug-Info" accesskey="u" rel="up">Custom Debug Info</a> [<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>
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<a name="Using-JIT-Debug-Info-Readers-1"></a>
<h4 class="subsection">29.4.1 Using JIT Debug Info Readers</h4>
<a name="index-jit_002dreader_002dload"></a>
<a name="index-jit_002dreader_002dunload"></a>
<p>Readers can be loaded and unloaded using the <code>jit-reader-load</code>
and <code>jit-reader-unload</code> commands.
</p>
<dl compact="compact">
<dt><code>jit-reader-load <var>reader</var></code></dt>
<dd><p>Load the JIT reader named <var>reader</var>, which is a shared
object specified as either an absolute or a relative file name. In
the latter case, <small>GDB</small> will try to load the reader from a
pre-configured directory, usually <samp><var>libdir</var>/gdb/</samp> on a UNIX
system (here <var>libdir</var> is the system library directory, often
<samp>/usr/local/lib</samp>).
</p>
<p>Only one reader can be active at a time; trying to load a second
reader when one is already loaded will result in <small>GDB</small>
reporting an error. A new JIT reader can be loaded by first unloading
the current one using <code>jit-reader-unload</code> and then invoking
<code>jit-reader-load</code>.
</p>
</dd>
<dt><code>jit-reader-unload</code></dt>
<dd><p>Unload the currently loaded JIT reader.
</p>
</dd>
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