1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<!-- Copyright (C) 1988-2021 Free Software Foundation, Inc. 4 5Permission is granted to copy, distribute and/or modify this document 6under the terms of the GNU Free Documentation License, Version 1.3 or 7any later version published by the Free Software Foundation; with the 8Invariant Sections being "Free Software" and "Free Software Needs 9Free Documentation", with the Front-Cover Texts being "A GNU Manual," 10and with the Back-Cover Texts as in (a) below. 11 12(a) The FSF's Back-Cover Text is: "You are free to copy and modify 13this GNU Manual. 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Higher values produce more verbose output. 81</p> 82</dd> 83<dt><code>show debug darwin</code></dt> 84<dd><a name="index-show-debug-darwin"></a> 85<p>Show the current state of Darwin messages. 86</p> 87</dd> 88<dt><code>set debug mach-o <var>num</var></code></dt> 89<dd><a name="index-set-debug-mach_002do"></a> 90<p>When set to a non zero value, enables debugging messages while 91<small>GDB</small> is reading Darwin object files. (<em>Mach-O</em> is the 92file format used on Darwin for object and executable files.) Higher 93values produce more verbose output. This is a command to diagnose 94problems internal to <small>GDB</small> and should not be needed in normal 95usage. 96</p> 97</dd> 98<dt><code>show debug mach-o</code></dt> 99<dd><a name="index-show-debug-mach_002do"></a> 100<p>Show the current state of Mach-O file messages. 101</p> 102</dd> 103<dt><code>set mach-exceptions on</code></dt> 104<dt><code>set mach-exceptions off</code></dt> 105<dd><a name="index-set-mach_002dexceptions"></a> 106<p>On Darwin, faults are first reported as a Mach exception and are then 107mapped to a Posix signal. Use this command to turn on trapping of 108Mach exceptions in the inferior. This might be sometimes useful to 109better understand the cause of a fault. The default is off. 110</p> 111</dd> 112<dt><code>show mach-exceptions</code></dt> 113<dd><a name="index-show-mach_002dexceptions"></a> 114<p>Show the current state of exceptions trapping. 115</p></dd> 116</dl> 117 118 119 120 121</body> 122</html> 123