93 lines
4.2 KiB
HTML
93 lines
4.2 KiB
HTML
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<title>Annotations Overview - GDB's Obsolete Annotations</title>
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<h1 class="settitle">GDB's Obsolete Annotations</h1>
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<div class="node">
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<a name="Annotations-Overview"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Limitations.html#Limitations">Limitations</a>,
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Previous: <a rel="previous" accesskey="p" href="index.html#Top">Top</a>,
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Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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<hr>
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</div>
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<h2 class="chapter">1 What is an Annotation?</h2>
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<p><a name="index-annotations-1"></a>
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To produce obsolete level two annotations, start <span class="sc">gdb</span> with the
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<code>--annotate=2</code> option.
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<p>Annotations start with a newline character, two ‘<samp><span class="samp">control-z</span></samp>’
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characters, and the name of the annotation. If there is no additional
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information associated with this annotation, the name of the annotation
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is followed immediately by a newline. If there is additional
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information, the name of the annotation is followed by a space, the
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additional information, and a newline. The additional information
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cannot contain newline characters.
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<p>Any output not beginning with a newline and two ‘<samp><span class="samp">control-z</span></samp>’
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characters denotes literal output from <span class="sc">gdb</span>. Currently there is
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no need for <span class="sc">gdb</span> to output a newline followed by two
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‘<samp><span class="samp">control-z</span></samp>’ characters, but if there was such a need, the
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annotations could be extended with an ‘<samp><span class="samp">escape</span></samp>’ annotation which
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means those three characters as output.
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<p>A simple example of starting up <span class="sc">gdb</span> with annotations is:
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<pre class="smallexample"> $ gdb --annotate=2
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GNU GDB 5.0
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Copyright 2000 Free Software Foundation, Inc.
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GDB is free software, covered by the GNU General Public License,
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and you are welcome to change it and/or distribute copies of it
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under certain conditions.
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Type "show copying" to see the conditions.
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There is absolutely no warranty for GDB. Type "show warranty"
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for details.
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This GDB was configured as "sparc-sun-sunos4.1.3"
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^Z^Zpre-prompt
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(gdb)
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^Z^Zprompt
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quit
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^Z^Zpost-prompt
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$
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</pre>
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<p>Here ‘<samp><span class="samp">quit</span></samp>’ is input to <span class="sc">gdb</span>; the rest is output from
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<span class="sc">gdb</span>. The three lines beginning ‘<samp><span class="samp">^Z^Z</span></samp>’ (where ‘<samp><span class="samp">^Z</span></samp>’
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denotes a ‘<samp><span class="samp">control-z</span></samp>’ character) are annotations; the rest is
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output from <span class="sc">gdb</span>.
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</body></html>
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