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- <a name="File-Caching"></a>
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- <a name="File-Caching-1"></a>
- <h3 class="section">18.2 File Caching</h3>
- <a name="index-caching-of-opened-files"></a>
- <a name="index-caching-of-bfd-objects"></a>
-
- <p>To speed up file loading, and reduce memory usage, <small>GDB</small> will
- reuse the <code>bfd</code> objects used to track open files. See <a href="http://sourceware.org/binutils/docs/bfd/index.html#Top">BFD</a> in <cite>The Binary File Descriptor Library</cite>. The following commands
- allow visibility and control of the caching behavior.
- </p>
- <dl compact="compact">
- <dd><a name="index-maint-info-bfds"></a>
- </dd>
- <dt><code>maint info bfds</code></dt>
- <dd><p>This prints information about each <code>bfd</code> object that is known to
- <small>GDB</small>.
- </p>
- <a name="index-maint-set-bfd_002dsharing"></a>
- <a name="index-maint-show-bfd_002dsharing"></a>
- <a name="index-bfd-caching"></a>
- </dd>
- <dt><code>maint set bfd-sharing</code></dt>
- <dt><code>maint show bfd-sharing</code></dt>
- <dd><p>Control whether <code>bfd</code> objects can be shared. When sharing is
- enabled <small>GDB</small> reuses already open <code>bfd</code> objects rather
- than reopening the same file. Turning sharing off does not cause
- already shared <code>bfd</code> objects to be unshared, but all future files
- that are opened will create a new <code>bfd</code> object. Similarly,
- re-enabling sharing does not cause multiple existing <code>bfd</code>
- objects to be collapsed into a single shared <code>bfd</code> object.
- </p>
- <a name="index-set-debug-bfd_002dcache-level"></a>
- <a name="index-bfd-caching-1"></a>
- </dd>
- <dt><code>set debug bfd-cache <var>level</var></code></dt>
- <dd><p>Turns on debugging of the bfd cache, setting the level to <var>level</var>.
- </p>
- <a name="index-show-debug-bfd_002dcache"></a>
- <a name="index-bfd-caching-2"></a>
- </dd>
- <dt><code>show debug bfd-cache</code></dt>
- <dd><p>Show the current debugging level of the bfd cache.
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