121 lines
6.6 KiB
HTML
121 lines
6.6 KiB
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<title>Disabling - Debugging with GDB</title>
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<meta name="description" content="Debugging with GDB">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Breakpoints.html#Breakpoints" title="Breakpoints">
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<link rel="prev" href="Delete-Breaks.html#Delete-Breaks" title="Delete Breaks">
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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<body>
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<div class="node">
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<a name="Disabling"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Conditions.html#Conditions">Conditions</a>,
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Previous: <a rel="previous" accesskey="p" href="Delete-Breaks.html#Delete-Breaks">Delete Breaks</a>,
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Up: <a rel="up" accesskey="u" href="Breakpoints.html#Breakpoints">Breakpoints</a>
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<hr>
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</div>
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<h4 class="subsection">5.1.5 Disabling Breakpoints</h4>
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<p><a name="index-enable_002fdisable-a-breakpoint-317"></a>Rather than deleting a breakpoint, watchpoint, or catchpoint, you might
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prefer to <dfn>disable</dfn> it. This makes the breakpoint inoperative as if
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it had been deleted, but remembers the information on the breakpoint so
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that you can <dfn>enable</dfn> it again later.
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<p>You disable and enable breakpoints, watchpoints, and catchpoints with
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the <code>enable</code> and <code>disable</code> commands, optionally specifying
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one or more breakpoint numbers as arguments. Use <code>info break</code> to
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print a list of all breakpoints, watchpoints, and catchpoints if you
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do not know which numbers to use.
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<p>Disabling and enabling a breakpoint that has multiple locations
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affects all of its locations.
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<p>A breakpoint, watchpoint, or catchpoint can have any of several
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different states of enablement:
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<ul>
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<li>Enabled. The breakpoint stops your program. A breakpoint set
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with the <code>break</code> command starts out in this state.
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<li>Disabled. The breakpoint has no effect on your program.
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<li>Enabled once. The breakpoint stops your program, but then becomes
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disabled.
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<li>Enabled for a count. The breakpoint stops your program for the next
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N times, then becomes disabled.
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<li>Enabled for deletion. The breakpoint stops your program, but
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immediately after it does so it is deleted permanently. A breakpoint
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set with the <code>tbreak</code> command starts out in this state.
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</ul>
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<p>You can use the following commands to enable or disable breakpoints,
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watchpoints, and catchpoints:
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<a name="index-disable-318"></a>
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<a name="index-dis-_0040r_007b_0028_0040code_007bdisable_007d_0029_007d-319"></a>
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<dl><dt><code>disable </code><span class="roman">[</span><code>breakpoints</code><span class="roman">]</span> <span class="roman">[</span><var>list</var><code>...</code><span class="roman">]</span><dd>Disable the specified breakpoints—or all breakpoints, if none are
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listed. A disabled breakpoint has no effect but is not forgotten. All
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options such as ignore-counts, conditions and commands are remembered in
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case the breakpoint is enabled again later. You may abbreviate
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<code>disable</code> as <code>dis</code>.
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<p><a name="index-enable-320"></a><br><dt><code>enable </code><span class="roman">[</span><code>breakpoints</code><span class="roman">]</span> <span class="roman">[</span><var>list</var><code>...</code><span class="roman">]</span><dd>Enable the specified breakpoints (or all defined breakpoints). They
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become effective once again in stopping your program.
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<br><dt><code>enable </code><span class="roman">[</span><code>breakpoints</code><span class="roman">]</span><code> once </code><var>list</var><code>...</code><dd>Enable the specified breakpoints temporarily. <span class="sc">gdb</span> disables any
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of these breakpoints immediately after stopping your program.
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<br><dt><code>enable </code><span class="roman">[</span><code>breakpoints</code><span class="roman">]</span><code> count </code><var>count</var> <var>list</var><code>...</code><dd>Enable the specified breakpoints temporarily. <span class="sc">gdb</span> records
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<var>count</var> with each of the specified breakpoints, and decrements a
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breakpoint's count when it is hit. When any count reaches 0,
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<span class="sc">gdb</span> disables that breakpoint. If a breakpoint has an ignore
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count (see <a href="Conditions.html#Conditions">Break Conditions</a>), that will be
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decremented to 0 before <var>count</var> is affected.
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<br><dt><code>enable </code><span class="roman">[</span><code>breakpoints</code><span class="roman">]</span><code> delete </code><var>list</var><code>...</code><dd>Enable the specified breakpoints to work once, then die. <span class="sc">gdb</span>
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deletes any of these breakpoints as soon as your program stops there.
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Breakpoints set by the <code>tbreak</code> command start out in this state.
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</dl>
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<!-- FIXME: I think the following ``Except for [...] @code{tbreak}'' is -->
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<!-- confusing: tbreak is also initially enabled. -->
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<p>Except for a breakpoint set with <code>tbreak</code> (see <a href="Set-Breaks.html#Set-Breaks">Setting Breakpoints</a>), breakpoints that you set are initially enabled;
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subsequently, they become disabled or enabled only when you use one of
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the commands above. (The command <code>until</code> can set and delete a
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breakpoint of its own, but it does not change the state of your other
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breakpoints; see <a href="Continuing-and-Stepping.html#Continuing-and-Stepping">Continuing and Stepping</a>.)
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</body></html>
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