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+<title>Debugging with GDB: Debugging Output</title>
+
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+<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
+<a name="Debugging-Output"></a>
+<div class="header">
+<p>
+Next: <a href="Other-Misc-Settings.html#Other-Misc-Settings" accesskey="n" rel="next">Other Misc Settings</a>, Previous: <a href="Messages_002fWarnings.html#Messages_002fWarnings" accesskey="p" rel="previous">Messages/Warnings</a>, Up: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="u" rel="up">Controlling GDB</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="Optional-Messages-about-Internal-Happenings"></a>
+<h3 class="section">22.10 Optional Messages about Internal Happenings</h3>
+<a name="index-optional-debugging-messages"></a>
+
+<p><small>GDB</small> has commands that enable optional debugging messages from
+various <small>GDB</small> subsystems; normally these commands are of
+interest to <small>GDB</small> maintainers, or when reporting a bug. This
+section documents those commands.
+</p>
+<dl compact="compact">
+<dd><a name="index-set-exec_002ddone_002ddisplay"></a>
+</dd>
+<dt><code>set exec-done-display</code></dt>
+<dd><p>Turns on or off the notification of asynchronous commands&rsquo;
+completion. When on, <small>GDB</small> will print a message when an
+asynchronous command finishes its execution. The default is off.
+<a name="index-show-exec_002ddone_002ddisplay"></a>
+</p></dd>
+<dt><code>show exec-done-display</code></dt>
+<dd><p>Displays the current setting of asynchronous command completion
+notification.
+</p>
+<a name="index-set-debug"></a>
+<a name="index-ARM-AArch64"></a>
+</dd>
+<dt><code>set debug aarch64</code></dt>
+<dd><p>Turns on or off display of debugging messages related to ARM AArch64.
+The default is off.
+<a name="index-show-debug"></a>
+</p></dd>
+<dt><code>show debug aarch64</code></dt>
+<dd><p>Displays the current state of displaying debugging messages related to
+ARM AArch64.
+</p>
+<a name="index-gdbarch-debugging-info"></a>
+<a name="index-architecture-debugging-info"></a>
+</dd>
+<dt><code>set debug arch</code></dt>
+<dd><p>Turns on or off display of gdbarch debugging info. The default is off
+</p></dd>
+<dt><code>show debug arch</code></dt>
+<dd><p>Displays the current state of displaying gdbarch debugging info.
+</p>
+</dd>
+<dt><code>set debug aix-thread</code></dt>
+<dd><a name="index-AIX-threads"></a>
+<p>Display debugging messages about inner workings of the AIX thread
+module.
+</p></dd>
+<dt><code>show debug aix-thread</code></dt>
+<dd><p>Show the current state of AIX thread debugging info display.
+</p>
+</dd>
+<dt><code>set debug check-physname</code></dt>
+<dd><a name="index-physname"></a>
+<p>Check the results of the &ldquo;physname&rdquo; computation. When reading DWARF
+debugging information for C<tt>++</tt>, <small>GDB</small> attempts to compute
+each entity&rsquo;s name. <small>GDB</small> can do this computation in two
+different ways, depending on exactly what information is present.
+When enabled, this setting causes <small>GDB</small> to compute the names
+both ways and display any discrepancies.
+</p></dd>
+<dt><code>show debug check-physname</code></dt>
+<dd><p>Show the current state of &ldquo;physname&rdquo; checking.
+</p>
+</dd>
+<dt><code>set debug coff-pe-read</code></dt>
+<dd><a name="index-COFF_002fPE-exported-symbols"></a>
+<p>Control display of debugging messages related to reading of COFF/PE
+exported symbols. The default is off.
+</p></dd>
+<dt><code>show debug coff-pe-read</code></dt>
+<dd><p>Displays the current state of displaying debugging messages related to
+reading of COFF/PE exported symbols.
+</p>
+</dd>
+<dt><code>set debug dwarf-die</code></dt>
+<dd><a name="index-DWARF-DIEs"></a>
+<p>Dump DWARF DIEs after they are read in.
+The value is the number of nesting levels to print.
+A value of zero turns off the display.
+</p></dd>
+<dt><code>show debug dwarf-die</code></dt>
+<dd><p>Show the current state of DWARF DIE debugging.
+</p>
+</dd>
+<dt><code>set debug dwarf-line</code></dt>
+<dd><a name="index-DWARF-Line-Tables"></a>
+<p>Turns on or off display of debugging messages related to reading
+DWARF line tables. The default is 0 (off).
+A value of 1 provides basic information.
+A value greater than 1 provides more verbose information.
+</p></dd>
+<dt><code>show debug dwarf-line</code></dt>
+<dd><p>Show the current state of DWARF line table debugging.
+</p>
+</dd>
+<dt><code>set debug dwarf-read</code></dt>
+<dd><a name="index-DWARF-Reading"></a>
+<p>Turns on or off display of debugging messages related to reading
+DWARF debug info. The default is 0 (off).
+A value of 1 provides basic information.
+A value greater than 1 provides more verbose information.
+</p></dd>
+<dt><code>show debug dwarf-read</code></dt>
+<dd><p>Show the current state of DWARF reader debugging.
+</p>
+</dd>
+<dt><code>set debug displaced</code></dt>
+<dd><a name="index-displaced-stepping-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> debugging info for the
+displaced stepping support. The default is off.
+</p></dd>
+<dt><code>show debug displaced</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> debugging info
+related to displaced stepping.
+</p>
+</dd>
+<dt><code>set debug event</code></dt>
+<dd><a name="index-event-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> event debugging info. The
+default is off.
+</p></dd>
+<dt><code>show debug event</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> event debugging
+info.
+</p>
+</dd>
+<dt><code>set debug event-loop</code></dt>
+<dd><a name="index-event_002dloop-debugging"></a>
+<p>Controls output of debugging info about the event loop. The possible
+values are &lsquo;<samp>off</samp>&rsquo;, &lsquo;<samp>all</samp>&rsquo; (shows all debugging info) and
+&lsquo;<samp>all-except-ui</samp>&rsquo; (shows all debugging info except those about
+UI-related events).
+</p></dd>
+<dt><code>show debug event-loop</code></dt>
+<dd><p>Shows the current state of displaying debugging info about the event
+loop.
+</p>
+</dd>
+<dt><code>set debug expression</code></dt>
+<dd><a name="index-expression-debugging-info"></a>
+<p>Turns on or off display of debugging info about <small>GDB</small>
+expression parsing. The default is off.
+</p></dd>
+<dt><code>show debug expression</code></dt>
+<dd><p>Displays the current state of displaying debugging info about
+<small>GDB</small> expression parsing.
+</p>
+</dd>
+<dt><code>set debug fbsd-lwp</code></dt>
+<dd><a name="index-FreeBSD-LWP-debug-messages"></a>
+<p>Turns on or off debugging messages from the FreeBSD LWP debug support.
+</p></dd>
+<dt><code>show debug fbsd-lwp</code></dt>
+<dd><p>Show the current state of FreeBSD LWP debugging messages.
+</p>
+</dd>
+<dt><code>set debug fbsd-nat</code></dt>
+<dd><a name="index-FreeBSD-native-target-debug-messages"></a>
+<p>Turns on or off debugging messages from the FreeBSD native target.
+</p></dd>
+<dt><code>show debug fbsd-nat</code></dt>
+<dd><p>Show the current state of FreeBSD native target debugging messages.
+</p>
+</dd>
+<dt><code>set debug fortran-array-slicing</code></dt>
+<dd><a name="index-fortran-array-slicing-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> Fortran array slicing
+debugging info. The default is off.
+</p>
+</dd>
+<dt><code>show debug fortran-array-slicing</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> Fortran array
+slicing debugging info.
+</p>
+</dd>
+<dt><code>set debug frame</code></dt>
+<dd><a name="index-frame-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> frame debugging info. The
+default is off.
+</p></dd>
+<dt><code>show debug frame</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> frame debugging
+info.
+</p>
+</dd>
+<dt><code>set debug gnu-nat</code></dt>
+<dd><a name="index-GNU_002fHurd-debug-messages"></a>
+<p>Turn on or off debugging messages from the <small>GNU</small>/Hurd debug support.
+</p></dd>
+<dt><code>show debug gnu-nat</code></dt>
+<dd><p>Show the current state of <small>GNU</small>/Hurd debugging messages.
+</p>
+</dd>
+<dt><code>set debug infrun</code></dt>
+<dd><a name="index-inferior-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> debugging info for running the inferior.
+The default is off. <samp>infrun.c</samp> contains GDB&rsquo;s runtime state machine used
+for implementing operations such as single-stepping the inferior.
+</p></dd>
+<dt><code>show debug infrun</code></dt>
+<dd><p>Displays the current state of <small>GDB</small> inferior debugging.
+</p>
+</dd>
+<dt><code>set debug infcall</code></dt>
+<dd><a name="index-inferior-function-call-debugging-info"></a>
+<p>Turns on or off display of debugging info related to inferior function
+calls made by <small>GDB</small>.
+</p></dd>
+<dt><code>show debug infcall</code></dt>
+<dd><p>Displays the current state of <small>GDB</small> inferior function call debugging.
+</p>
+</dd>
+<dt><code>set debug jit</code></dt>
+<dd><a name="index-just_002din_002dtime-compilation_002c-debugging-messages"></a>
+<p>Turn on or off debugging messages from JIT debug support.
+</p></dd>
+<dt><code>show debug jit</code></dt>
+<dd><p>Displays the current state of <small>GDB</small> JIT debugging.
+</p>
+</dd>
+<dt><code>set debug linux-nat <span class="roman">[</span>on<span class="roman">|</span>off<span class="roman">]</span></code></dt>
+<dd><a name="index-GNU_002fLinux-native-target-debug-messages"></a>
+<a name="index-Linux-native-targets"></a>
+<p>Turn on or off debugging messages from the Linux native target debug support.
+</p></dd>
+<dt><code>show debug linux-nat</code></dt>
+<dd><p>Show the current state of Linux native target debugging messages.
+</p>
+</dd>
+<dt><code>set debug linux-namespaces</code></dt>
+<dd><a name="index-GNU_002fLinux-namespaces-debug-messages"></a>
+<p>Turn on or off debugging messages from the Linux namespaces debug support.
+</p></dd>
+<dt><code>show debug linux-namespaces</code></dt>
+<dd><p>Show the current state of Linux namespaces debugging messages.
+</p>
+</dd>
+<dt><code>set debug mach-o</code></dt>
+<dd><a name="index-Mach_002dO-symbols-processing"></a>
+<p>Control display of debugging messages related to Mach-O symbols
+processing. The default is off.
+</p></dd>
+<dt><code>show debug mach-o</code></dt>
+<dd><p>Displays the current state of displaying debugging messages related to
+reading of COFF/PE exported symbols.
+</p>
+</dd>
+<dt><code>set debug notification</code></dt>
+<dd><a name="index-remote-async-notification-debugging-info"></a>
+<p>Turn on or off debugging messages about remote async notification.
+The default is off.
+</p></dd>
+<dt><code>show debug notification</code></dt>
+<dd><p>Displays the current state of remote async notification debugging messages.
+</p>
+</dd>
+<dt><code>set debug observer</code></dt>
+<dd><a name="index-observer-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> observer debugging. This
+includes info such as the notification of observable events.
+</p></dd>
+<dt><code>show debug observer</code></dt>
+<dd><p>Displays the current state of observer debugging.
+</p>
+</dd>
+<dt><code>set debug overload</code></dt>
+<dd><a name="index-C_002b_002b-overload-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> C<tt>++</tt> overload debugging
+info. This includes info such as ranking of functions, etc. The default
+is off.
+</p></dd>
+<dt><code>show debug overload</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> C<tt>++</tt> overload
+debugging info.
+</p>
+<a name="index-expression-parser_002c-debugging-info"></a>
+<a name="index-debug-expression-parser"></a>
+</dd>
+<dt><code>set debug parser</code></dt>
+<dd><p>Turns on or off the display of expression parser debugging output.
+Internally, this sets the <code>yydebug</code> variable in the expression
+parser. See <a href="http://www.gnu.org/software/bison/manual/html_node/Tracing.html#Tracing">Tracing Your Parser</a> in <cite>Bison</cite>, for
+details. The default is off.
+</p></dd>
+<dt><code>show debug parser</code></dt>
+<dd><p>Show the current state of expression parser debugging.
+</p>
+<a name="index-packets_002c-reporting-on-stdout"></a>
+<a name="index-serial-connections_002c-debugging"></a>
+<a name="index-debug-remote-protocol"></a>
+<a name="index-remote-protocol-debugging"></a>
+<a name="index-display-remote-packets"></a>
+</dd>
+<dt><code>set debug remote</code></dt>
+<dd><p>Turns on or off display of reports on all packets sent back and forth across
+the serial line to the remote machine. The info is printed on the
+<small>GDB</small> standard output stream. The default is off.
+</p></dd>
+<dt><code>show debug remote</code></dt>
+<dd><p>Displays the state of display of remote packets.
+</p>
+</dd>
+<dt><code>set debug remote-packet-max-chars</code></dt>
+<dd><p>Sets the maximum number of characters to display for each remote packet when
+<code>set debug remote</code> is on. This is useful to prevent <small>GDB</small> from
+displaying lengthy remote packets and polluting the console.
+</p>
+<p>The default value is <code>512</code>, which means <small>GDB</small> will truncate each
+remote packet after 512 bytes.
+</p>
+<p>Setting this option to <code>unlimited</code> will disable truncation and will output
+the full length of the remote packets.
+</p></dd>
+<dt><code>show debug remote-packet-max-chars</code></dt>
+<dd><p>Displays the number of bytes to output for remote packet debugging.
+</p>
+</dd>
+<dt><code>set debug separate-debug-file</code></dt>
+<dd><p>Turns on or off display of debug output about separate debug file search.
+</p></dd>
+<dt><code>show debug separate-debug-file</code></dt>
+<dd><p>Displays the state of separate debug file search debug output.
+</p>
+</dd>
+<dt><code>set debug serial</code></dt>
+<dd><p>Turns on or off display of <small>GDB</small> serial debugging info. The
+default is off.
+</p></dd>
+<dt><code>show debug serial</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> serial debugging
+info.
+</p>
+</dd>
+<dt><code>set debug solib</code></dt>
+<dd><p>Turns on or off display of debugging messages related to shared libraries.
+The default is off.
+</p></dd>
+<dt><code>show debug solib</code></dt>
+<dd><p>Show the current state of solib debugging messages.
+</p>
+</dd>
+<dt><code>set debug symbol-lookup</code></dt>
+<dd><a name="index-symbol-lookup"></a>
+<p>Turns on or off display of debugging messages related to symbol lookup.
+The default is 0 (off).
+A value of 1 provides basic information.
+A value greater than 1 provides more verbose information.
+</p></dd>
+<dt><code>show debug symbol-lookup</code></dt>
+<dd><p>Show the current state of symbol lookup debugging messages.
+</p>
+</dd>
+<dt><code>set debug symfile</code></dt>
+<dd><a name="index-symbol-file-functions"></a>
+<p>Turns on or off display of debugging messages related to symbol file functions.
+The default is off. See <a href="Files.html#Files">Files</a>.
+</p></dd>
+<dt><code>show debug symfile</code></dt>
+<dd><p>Show the current state of symbol file debugging messages.
+</p>
+</dd>
+<dt><code>set debug symtab-create</code></dt>
+<dd><a name="index-symbol-table-creation"></a>
+<p>Turns on or off display of debugging messages related to symbol table creation.
+The default is 0 (off).
+A value of 1 provides basic information.
+A value greater than 1 provides more verbose information.
+</p></dd>
+<dt><code>show debug symtab-create</code></dt>
+<dd><p>Show the current state of symbol table creation debugging.
+</p>
+</dd>
+<dt><code>set debug target</code></dt>
+<dd><a name="index-target-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> target debugging info. This info
+includes what is going on at the target level of GDB, as it happens. The
+default is 0. Set it to 1 to track events, and to 2 to also track the
+value of large memory transfers.
+</p></dd>
+<dt><code>show debug target</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> target debugging
+info.
+</p>
+</dd>
+<dt><code>set debug timestamp</code></dt>
+<dd><a name="index-timestamping-debugging-info"></a>
+<p>Turns on or off display of timestamps with <small>GDB</small> debugging info.
+When enabled, seconds and microseconds are displayed before each debugging
+message.
+</p></dd>
+<dt><code>show debug timestamp</code></dt>
+<dd><p>Displays the current state of displaying timestamps with <small>GDB</small>
+debugging info.
+</p>
+</dd>
+<dt><code>set debug varobj</code></dt>
+<dd><a name="index-variable-object-debugging-info"></a>
+<p>Turns on or off display of <small>GDB</small> variable object debugging
+info. The default is off.
+</p></dd>
+<dt><code>show debug varobj</code></dt>
+<dd><p>Displays the current state of displaying <small>GDB</small> variable object
+debugging info.
+</p>
+</dd>
+<dt><code>set debug xml</code></dt>
+<dd><a name="index-XML-parser-debugging"></a>
+<p>Turn on or off debugging messages for built-in XML parsers.
+</p></dd>
+<dt><code>show debug xml</code></dt>
+<dd><p>Displays the current state of XML debugging messages.
+</p></dd>
+</dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Other-Misc-Settings.html#Other-Misc-Settings" accesskey="n" rel="next">Other Misc Settings</a>, Previous: <a href="Messages_002fWarnings.html#Messages_002fWarnings" accesskey="p" rel="previous">Messages/Warnings</a>, Up: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="u" rel="up">Controlling GDB</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>
+
+
+
+</body>
+</html>