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162 lines
7.9 KiB
HTML
162 lines
7.9 KiB
HTML
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<head>
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<title>Disabling (Debugging with GDB)</title>
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Breakpoints.html#Breakpoints" rel="up" title="Breakpoints">
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<link href="Conditions.html#Conditions" rel="next" title="Conditions">
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<link href="Delete-Breaks.html#Delete-Breaks" rel="prev" title="Delete Breaks">
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</head>
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<body lang="en">
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<a name="Disabling"></a>
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<div class="header">
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<p>
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Next: <a href="Conditions.html#Conditions" accesskey="n" rel="next">Conditions</a>, Previous: <a href="Delete-Breaks.html#Delete-Breaks" accesskey="p" rel="prev">Delete Breaks</a>, Up: <a href="Breakpoints.html#Breakpoints" accesskey="u" rel="up">Breakpoints</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Disabling-Breakpoints"></a>
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<h4 class="subsection">5.1.5 Disabling Breakpoints</h4>
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<a name="index-enable_002fdisable-a-breakpoint"></a>
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<p>Rather than deleting a breakpoint, watchpoint, or catchpoint, you might
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prefer to <em>disable</em> 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 <em>enable</em> it again later.
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</p>
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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>
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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>
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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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</p>
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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><li> Disabled. The breakpoint has no effect on your program.
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</li><li> Enabled once. The breakpoint stops your program, but then becomes
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disabled.
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</li><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><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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</li></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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</p>
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<dl compact="compact">
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<dd><a name="index-disable"></a>
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<a name="index-dis-_0028disable_0029"></a>
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</dd>
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<dt><code>disable <span class="roman">[</span>breakpoints<span class="roman">]</span> <span class="roman">[</span><var>list</var>…<span class="roman">]</span></code></dt>
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<dd><p>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>
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<a name="index-enable"></a>
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</dd>
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<dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> <span class="roman">[</span><var>list</var>…<span class="roman">]</span></code></dt>
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<dd><p>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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</p>
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</dd>
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<dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> once <var>list</var>…</code></dt>
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<dd><p>Enable the specified breakpoints temporarily. <small>GDB</small> disables any
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of these breakpoints immediately after stopping your program.
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</p>
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</dd>
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<dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> count <var>count</var> <var>list</var>…</code></dt>
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<dd><p>Enable the specified breakpoints temporarily. <small>GDB</small> 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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<small>GDB</small> 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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</p>
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</dd>
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<dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> delete <var>list</var>…</code></dt>
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<dd><p>Enable the specified breakpoints to work once, then die. <small>GDB</small>
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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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</p></dd>
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</dl>
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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
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Stepping</a>.)
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</p>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Conditions.html#Conditions" accesskey="n" rel="next">Conditions</a>, Previous: <a href="Delete-Breaks.html#Delete-Breaks" accesskey="p" rel="prev">Delete Breaks</a>, Up: <a href="Breakpoints.html#Breakpoints" accesskey="u" rel="up">Breakpoints</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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</body>
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</html>
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