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| <title>Debugging with GDB: Disabling</title> |
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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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| <a name="Disabling-Breakpoints"></a> |
| <h4 class="subsection">5.1.5 Disabling Breakpoints</h4> |
| |
| <a name="index-enable_002fdisable-a-breakpoint"></a> |
| <p>Rather than deleting a breakpoint, watchpoint, or catchpoint, you might |
| prefer to <em>disable</em> it. This makes the breakpoint inoperative as if |
| it had been deleted, but remembers the information on the breakpoint so |
| that you can <em>enable</em> it again later. |
| </p> |
| <p>You disable and enable breakpoints, watchpoints, and catchpoints with |
| the <code>enable</code> and <code>disable</code> commands, optionally specifying |
| one or more breakpoint numbers as arguments. Use <code>info break</code> to |
| print a list of all breakpoints, watchpoints, and catchpoints if you |
| do not know which numbers to use. |
| </p> |
| <p>Disabling and enabling a breakpoint that has multiple locations |
| affects all of its locations. |
| </p> |
| <p>A breakpoint, watchpoint, or catchpoint can have any of several |
| different states of enablement: |
| </p> |
| <ul> |
| <li> Enabled. The breakpoint stops your program. A breakpoint set |
| with the <code>break</code> command starts out in this state. |
| </li><li> Disabled. The breakpoint has no effect on your program. |
| </li><li> Enabled once. The breakpoint stops your program, but then becomes |
| disabled. |
| </li><li> Enabled for a count. The breakpoint stops your program for the next |
| N times, then becomes disabled. |
| </li><li> Enabled for deletion. The breakpoint stops your program, but |
| immediately after it does so it is deleted permanently. A breakpoint |
| set with the <code>tbreak</code> command starts out in this state. |
| </li></ul> |
| |
| <p>You can use the following commands to enable or disable breakpoints, |
| watchpoints, and catchpoints: |
| </p> |
| <dl compact="compact"> |
| <dd><a name="index-disable"></a> |
| <a name="index-dis-_0028disable_0029"></a> |
| </dd> |
| <dt><code>disable <span class="roman">[</span>breakpoints<span class="roman">]</span> <span class="roman">[</span><var>range</var>…<span class="roman">]</span></code></dt> |
| <dd><p>Disable the specified breakpoints—or all breakpoints, if none are |
| listed. A disabled breakpoint has no effect but is not forgotten. All |
| options such as ignore-counts, conditions and commands are remembered in |
| case the breakpoint is enabled again later. You may abbreviate |
| <code>disable</code> as <code>dis</code>. |
| </p> |
| <a name="index-enable"></a> |
| </dd> |
| <dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> <span class="roman">[</span><var>range</var>…<span class="roman">]</span></code></dt> |
| <dd><p>Enable the specified breakpoints (or all defined breakpoints). They |
| become effective once again in stopping your program. |
| </p> |
| </dd> |
| <dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> once <var>range</var>…</code></dt> |
| <dd><p>Enable the specified breakpoints temporarily. <small>GDB</small> disables any |
| of these breakpoints immediately after stopping your program. |
| </p> |
| </dd> |
| <dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> count <var>count</var> <var>range</var>…</code></dt> |
| <dd><p>Enable the specified breakpoints temporarily. <small>GDB</small> records |
| <var>count</var> with each of the specified breakpoints, and decrements a |
| breakpoint’s count when it is hit. When any count reaches 0, |
| <small>GDB</small> disables that breakpoint. If a breakpoint has an ignore |
| count (see <a href="Conditions.html#Conditions">Break Conditions</a>), that will be |
| decremented to 0 before <var>count</var> is affected. |
| </p> |
| </dd> |
| <dt><code>enable <span class="roman">[</span>breakpoints<span class="roman">]</span> delete <var>range</var>…</code></dt> |
| <dd><p>Enable the specified breakpoints to work once, then die. <small>GDB</small> |
| deletes any of these breakpoints as soon as your program stops there. |
| Breakpoints set by the <code>tbreak</code> command start out in this state. |
| </p></dd> |
| </dl> |
| |
| <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; |
| subsequently, they become disabled or enabled only when you use one of |
| the commands above. (The command <code>until</code> can set and delete a |
| breakpoint of its own, but it does not change the state of your other |
| breakpoints; see <a href="Continuing-and-Stepping.html#Continuing-and-Stepping">Continuing and |
| Stepping</a>.) |
| </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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