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| <h4 class="subsection">5.1.5 Disabling Breakpoints</h4> |
| |
| <p><a name="index-enable_002fdisable-a-breakpoint-317"></a>Rather than deleting a breakpoint, watchpoint, or catchpoint, you might |
| prefer to <dfn>disable</dfn> it. This makes the breakpoint inoperative as if |
| it had been deleted, but remembers the information on the breakpoint so |
| that you can <dfn>enable</dfn> it again later. |
| |
| <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>Disabling and enabling a breakpoint that has multiple locations |
| affects all of its locations. |
| |
| <p>A breakpoint, watchpoint, or catchpoint can have any of several |
| different states of enablement: |
| |
| <ul> |
| <li>Enabled. The breakpoint stops your program. A breakpoint set |
| with the <code>break</code> command starts out in this state. |
| <li>Disabled. The breakpoint has no effect on your program. |
| <li>Enabled once. The breakpoint stops your program, but then becomes |
| disabled. |
| <li>Enabled for a count. The breakpoint stops your program for the next |
| N times, then becomes disabled. |
| <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. |
| </ul> |
| |
| <p>You can use the following commands to enable or disable breakpoints, |
| watchpoints, and catchpoints: |
| |
| |
| <a name="index-disable-318"></a> |
| <a name="index-dis-_0040r_007b_0028_0040code_007bdisable_007d_0029_007d-319"></a> |
| <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 |
| 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-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 |
| become effective once again in stopping your program. |
| |
| <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 |
| of these breakpoints immediately after stopping your program. |
| |
| <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 |
| <var>count</var> with each of the specified breakpoints, and decrements a |
| breakpoint's count when it is hit. When any count reaches 0, |
| <span class="sc">gdb</span> 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. |
| |
| <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> |
| 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. |
| </dl> |
| |
| <!-- FIXME: I think the following ``Except for [...] @code{tbreak}'' is --> |
| <!-- confusing: tbreak is also initially enabled. --> |
| <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>.) |
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