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+<a name="Darwin"></a>
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+<hr>
+<a name="Darwin-1"></a>
+<h4 class="subsection">21.1.6 Darwin</h4>
+<a name="index-Darwin"></a>
+
+<p><small>GDB</small> provides the following commands specific to the Darwin target:
+</p>
+<dl compact="compact">
+<dt><code>set debug darwin <var>num</var></code></dt>
+<dd><a name="index-set-debug-darwin"></a>
+<p>When set to a non zero value, enables debugging messages specific to
+the Darwin support.  Higher values produce more verbose output.
+</p>
+</dd>
+<dt><code>show debug darwin</code></dt>
+<dd><a name="index-show-debug-darwin"></a>
+<p>Show the current state of Darwin messages.
+</p>
+</dd>
+<dt><code>set debug mach-o <var>num</var></code></dt>
+<dd><a name="index-set-debug-mach_002do"></a>
+<p>When set to a non zero value, enables debugging messages while
+<small>GDB</small> is reading Darwin object files.  (<em>Mach-O</em> is the
+file format used on Darwin for object and executable files.)  Higher
+values produce more verbose output.  This is a command to diagnose
+problems internal to <small>GDB</small> and should not be needed in normal
+usage.
+</p>
+</dd>
+<dt><code>show debug mach-o</code></dt>
+<dd><a name="index-show-debug-mach_002do"></a>
+<p>Show the current state of Mach-O file messages.
+</p>
+</dd>
+<dt><code>set mach-exceptions on</code></dt>
+<dt><code>set mach-exceptions off</code></dt>
+<dd><a name="index-set-mach_002dexceptions"></a>
+<p>On Darwin, faults are first reported as a Mach exception and are then
+mapped to a Posix signal.  Use this command to turn on trapping of
+Mach exceptions in the inferior.  This might be sometimes useful to
+better understand the cause of a fault.  The default is off.
+</p>
+</dd>
+<dt><code>show mach-exceptions</code></dt>
+<dd><a name="index-show-mach_002dexceptions"></a>
+<p>Show the current state of exceptions trapping.
+</p></dd>
+</dl>
+
+
+
+
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+</html>