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<title>Debugging Output - Debugging with GDB</title>
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<a name="Debugging-Output"></a>
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Next: <a rel="next" accesskey="n" href="Other-Misc-Settings.html#Other-Misc-Settings">Other Misc Settings</a>,
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Previous: <a rel="previous" accesskey="p" href="Messages_002fWarnings.html#Messages_002fWarnings">Messages/Warnings</a>,
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Up: <a rel="up" accesskey="u" href="Controlling-GDB.html#Controlling-GDB">Controlling GDB</a>
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<h3 class="section">22.10 Optional Messages about Internal Happenings</h3>
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<p><a name="index-optional-debugging-messages-1744"></a>
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<span class="sc">gdb</span> has commands that enable optional debugging messages from
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various <span class="sc">gdb</span> subsystems; normally these commands are of
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interest to <span class="sc">gdb</span> maintainers, or when reporting a bug. This
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section documents those commands.
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<a name="index-set-exec_002ddone_002ddisplay-1745"></a>
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<dl><dt><code>set exec-done-display</code><dd>Turns on or off the notification of asynchronous commands'
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completion. When on, <span class="sc">gdb</span> will print a message when an
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asynchronous command finishes its execution. The default is off.
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<a name="index-show-exec_002ddone_002ddisplay-1746"></a><br><dt><code>show exec-done-display</code><dd>Displays the current setting of asynchronous command completion
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notification.
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<a name="index-set-debug-1747"></a><a name="index-ARM-AArch64-1748"></a><br><dt><code>set debug aarch64</code><dd>Turns on or off display of debugging messages related to ARM AArch64.
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The default is off.
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<a name="index-show-debug-1749"></a><br><dt><code>show debug aarch64</code><dd>Displays the current state of displaying debugging messages related to
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ARM AArch64.
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<a name="index-gdbarch-debugging-info-1750"></a><a name="index-architecture-debugging-info-1751"></a><br><dt><code>set debug arch</code><dd>Turns on or off display of gdbarch debugging info. The default is off
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<br><dt><code>show debug arch</code><dd>Displays the current state of displaying gdbarch debugging info.
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<br><dt><code>set debug aix-solib</code><dd><a name="index-AIX-shared-library-debugging-1752"></a>Control display of debugging messages from the AIX shared library
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support module. The default is off.
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<br><dt><code>show debug aix-thread</code><dd>Show the current state of displaying AIX shared library debugging messages.
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<br><dt><code>set debug aix-thread</code><dd><a name="index-AIX-threads-1753"></a>Display debugging messages about inner workings of the AIX thread
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module.
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<br><dt><code>show debug aix-thread</code><dd>Show the current state of AIX thread debugging info display.
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<br><dt><code>set debug check-physname</code><dd><a name="index-physname-1754"></a>Check the results of the “physname” computation. When reading DWARF
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debugging information for C<tt>++</tt>, <span class="sc">gdb</span> attempts to compute
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each entity's name. <span class="sc">gdb</span> can do this computation in two
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different ways, depending on exactly what information is present.
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When enabled, this setting causes <span class="sc">gdb</span> to compute the names
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both ways and display any discrepancies.
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<br><dt><code>show debug check-physname</code><dd>Show the current state of “physname” checking.
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<br><dt><code>set debug coff-pe-read</code><dd><a name="index-COFF_002fPE-exported-symbols-1755"></a>Control display of debugging messages related to reading of COFF/PE
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exported symbols. The default is off.
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<br><dt><code>show debug coff-pe-read</code><dd>Displays the current state of displaying debugging messages related to
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reading of COFF/PE exported symbols.
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<br><dt><code>set debug dwarf-die</code><dd><a name="index-DWARF-DIEs-1756"></a>Dump DWARF DIEs after they are read in.
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The value is the number of nesting levels to print.
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A value of zero turns off the display.
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<br><dt><code>show debug dwarf-die</code><dd>Show the current state of DWARF DIE debugging.
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<br><dt><code>set debug dwarf-line</code><dd><a name="index-DWARF-Line-Tables-1757"></a>Turns on or off display of debugging messages related to reading
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DWARF line tables. The default is 0 (off).
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A value of 1 provides basic information.
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A value greater than 1 provides more verbose information.
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<br><dt><code>show debug dwarf-line</code><dd>Show the current state of DWARF line table debugging.
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<br><dt><code>set debug dwarf-read</code><dd><a name="index-DWARF-Reading-1758"></a>Turns on or off display of debugging messages related to reading
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DWARF debug info. The default is 0 (off).
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A value of 1 provides basic information.
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A value greater than 1 provides more verbose information.
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<br><dt><code>show debug dwarf-read</code><dd>Show the current state of DWARF reader debugging.
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<br><dt><code>set debug displaced</code><dd><a name="index-displaced-stepping-debugging-info-1759"></a>Turns on or off display of <span class="sc">gdb</span> debugging info for the
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displaced stepping support. The default is off.
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<br><dt><code>show debug displaced</code><dd>Displays the current state of displaying <span class="sc">gdb</span> debugging info
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related to displaced stepping.
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<br><dt><code>set debug event</code><dd><a name="index-event-debugging-info-1760"></a>Turns on or off display of <span class="sc">gdb</span> event debugging info. The
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default is off.
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<br><dt><code>show debug event</code><dd>Displays the current state of displaying <span class="sc">gdb</span> event debugging
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info.
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<br><dt><code>set debug expression</code><dd><a name="index-expression-debugging-info-1761"></a>Turns on or off display of debugging info about <span class="sc">gdb</span>
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expression parsing. The default is off.
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<br><dt><code>show debug expression</code><dd>Displays the current state of displaying debugging info about
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<span class="sc">gdb</span> expression parsing.
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<br><dt><code>set debug fbsd-lwp</code><dd><a name="index-FreeBSD-LWP-debug-messages-1762"></a>Turns on or off debugging messages from the FreeBSD LWP debug support.
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<br><dt><code>show debug fbsd-lwp</code><dd>Show the current state of FreeBSD LWP debugging messages.
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<br><dt><code>set debug fbsd-nat</code><dd><a name="index-FreeBSD-native-target-debug-messages-1763"></a>Turns on or off debugging messages from the FreeBSD native target.
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<br><dt><code>show debug fbsd-nat</code><dd>Show the current state of FreeBSD native target debugging messages.
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<br><dt><code>set debug frame</code><dd><a name="index-frame-debugging-info-1764"></a>Turns on or off display of <span class="sc">gdb</span> frame debugging info. The
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default is off.
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<br><dt><code>show debug frame</code><dd>Displays the current state of displaying <span class="sc">gdb</span> frame debugging
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info.
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<br><dt><code>set debug gnu-nat</code><dd><a name="index-g_t_0040sc_007bgnu_007d_002fHurd-debug-messages-1765"></a>Turn on or off debugging messages from the <span class="sc">gnu</span>/Hurd debug support.
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<br><dt><code>show debug gnu-nat</code><dd>Show the current state of <span class="sc">gnu</span>/Hurd debugging messages.
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<br><dt><code>set debug infrun</code><dd><a name="index-inferior-debugging-info-1766"></a>Turns on or off display of <span class="sc">gdb</span> debugging info for running the inferior.
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The default is off. <samp><span class="file">infrun.c</span></samp> contains GDB's runtime state machine used
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for implementing operations such as single-stepping the inferior.
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<br><dt><code>show debug infrun</code><dd>Displays the current state of <span class="sc">gdb</span> inferior debugging.
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<br><dt><code>set debug jit</code><dd><a name="index-just_002din_002dtime-compilation_002c-debugging-messages-1767"></a>Turn on or off debugging messages from JIT debug support.
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<br><dt><code>show debug jit</code><dd>Displays the current state of <span class="sc">gdb</span> JIT debugging.
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<br><dt><code>set debug lin-lwp</code><dd><a name="index-g_t_0040sc_007bgnu_007d_002fLinux-LWP-debug-messages-1768"></a><a name="index-Linux-lightweight-processes-1769"></a>Turn on or off debugging messages from the Linux LWP debug support.
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<br><dt><code>show debug lin-lwp</code><dd>Show the current state of Linux LWP debugging messages.
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<br><dt><code>set debug linux-namespaces</code><dd><a name="index-g_t_0040sc_007bgnu_007d_002fLinux-namespaces-debug-messages-1770"></a>Turn on or off debugging messages from the Linux namespaces debug support.
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<br><dt><code>show debug linux-namespaces</code><dd>Show the current state of Linux namespaces debugging messages.
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<br><dt><code>set debug mach-o</code><dd><a name="index-Mach_002dO-symbols-processing-1771"></a>Control display of debugging messages related to Mach-O symbols
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processing. The default is off.
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<br><dt><code>show debug mach-o</code><dd>Displays the current state of displaying debugging messages related to
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reading of COFF/PE exported symbols.
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<br><dt><code>set debug notification</code><dd><a name="index-remote-async-notification-debugging-info-1772"></a>Turn on or off debugging messages about remote async notification.
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The default is off.
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<br><dt><code>show debug notification</code><dd>Displays the current state of remote async notification debugging messages.
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<br><dt><code>set debug observer</code><dd><a name="index-observer-debugging-info-1773"></a>Turns on or off display of <span class="sc">gdb</span> observer debugging. This
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includes info such as the notification of observable events.
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<br><dt><code>show debug observer</code><dd>Displays the current state of observer debugging.
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<br><dt><code>set debug overload</code><dd><a name="index-C_0040t_007b_002b_002b_007d-overload-debugging-info-1774"></a>Turns on or off display of <span class="sc">gdb</span> C<tt>++</tt> overload debugging
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info. This includes info such as ranking of functions, etc. The default
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is off.
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<br><dt><code>show debug overload</code><dd>Displays the current state of displaying <span class="sc">gdb</span> C<tt>++</tt> overload
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debugging info.
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<a name="index-expression-parser_002c-debugging-info-1775"></a><a name="index-debug-expression-parser-1776"></a><br><dt><code>set debug parser</code><dd>Turns on or off the display of expression parser debugging output.
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Internally, this sets the <code>yydebug</code> variable in the expression
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parser. See <a href="../bison/Tracing.html#Tracing">Tracing Your Parser</a>, for
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details. The default is off.
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<br><dt><code>show debug parser</code><dd>Show the current state of expression parser debugging.
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<a name="index-packets_002c-reporting-on-stdout-1777"></a><a name="index-serial-connections_002c-debugging-1778"></a><a name="index-debug-remote-protocol-1779"></a><a name="index-remote-protocol-debugging-1780"></a><a name="index-display-remote-packets-1781"></a><br><dt><code>set debug remote</code><dd>Turns on or off display of reports on all packets sent back and forth across
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the serial line to the remote machine. The info is printed on the
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<span class="sc">gdb</span> standard output stream. The default is off.
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<br><dt><code>show debug remote</code><dd>Displays the state of display of remote packets.
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<br><dt><code>set debug separate-debug-file</code><dd>Turns on or off display of debug output about separate debug file search.
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<br><dt><code>show debug separate-debug-file</code><dd>Displays the state of separate debug file search debug output.
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<br><dt><code>set debug serial</code><dd>Turns on or off display of <span class="sc">gdb</span> serial debugging info. The
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default is off.
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<br><dt><code>show debug serial</code><dd>Displays the current state of displaying <span class="sc">gdb</span> serial debugging
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info.
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<br><dt><code>set debug solib-frv</code><dd><a name="index-FR_002dV-shared_002dlibrary-debugging-1782"></a>Turn on or off debugging messages for FR-V shared-library code.
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<br><dt><code>show debug solib-frv</code><dd>Display the current state of FR-V shared-library code debugging
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messages.
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<br><dt><code>set debug symbol-lookup</code><dd><a name="index-symbol-lookup-1783"></a>Turns on or off display of debugging messages related to symbol lookup.
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The default is 0 (off).
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A value of 1 provides basic information.
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A value greater than 1 provides more verbose information.
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<br><dt><code>show debug symbol-lookup</code><dd>Show the current state of symbol lookup debugging messages.
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<br><dt><code>set debug symfile</code><dd><a name="index-symbol-file-functions-1784"></a>Turns on or off display of debugging messages related to symbol file functions.
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The default is off. See <a href="Files.html#Files">Files</a>.
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<br><dt><code>show debug symfile</code><dd>Show the current state of symbol file debugging messages.
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<br><dt><code>set debug symtab-create</code><dd><a name="index-symbol-table-creation-1785"></a>Turns on or off display of debugging messages related to symbol table creation.
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The default is 0 (off).
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A value of 1 provides basic information.
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A value greater than 1 provides more verbose information.
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<br><dt><code>show debug symtab-create</code><dd>Show the current state of symbol table creation debugging.
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<br><dt><code>set debug target</code><dd><a name="index-target-debugging-info-1786"></a>Turns on or off display of <span class="sc">gdb</span> target debugging info. This info
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includes what is going on at the target level of GDB, as it happens. The
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default is 0. Set it to 1 to track events, and to 2 to also track the
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value of large memory transfers.
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<br><dt><code>show debug target</code><dd>Displays the current state of displaying <span class="sc">gdb</span> target debugging
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info.
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<br><dt><code>set debug timestamp</code><dd><a name="index-timestampping-debugging-info-1787"></a>Turns on or off display of timestamps with <span class="sc">gdb</span> debugging info.
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When enabled, seconds and microseconds are displayed before each debugging
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message.
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<br><dt><code>show debug timestamp</code><dd>Displays the current state of displaying timestamps with <span class="sc">gdb</span>
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debugging info.
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<br><dt><code>set debug varobj</code><dd><a name="index-variable-object-debugging-info-1788"></a>Turns on or off display of <span class="sc">gdb</span> variable object debugging
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info. The default is off.
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<br><dt><code>show debug varobj</code><dd>Displays the current state of displaying <span class="sc">gdb</span> variable object
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debugging info.
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<br><dt><code>set debug xml</code><dd><a name="index-XML-parser-debugging-1789"></a>Turn on or off debugging messages for built-in XML parsers.
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<br><dt><code>show debug xml</code><dd>Displays the current state of XML debugging messages.
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</dl>
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</body></html>
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