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118 lines
5.0 KiB
HTML
118 lines
5.0 KiB
HTML
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<head>
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<title>File Caching (Debugging with GDB)</title>
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<meta name="description" content="File Caching (Debugging with GDB)">
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<meta name="keywords" content="File Caching (Debugging with GDB)">
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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="GDB-Files.html#GDB-Files" rel="up" title="GDB Files">
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<link href="Separate-Debug-Files.html#Separate-Debug-Files" rel="next" title="Separate Debug Files">
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<a name="File-Caching"></a>
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<div class="header">
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<p>
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Next: <a href="Separate-Debug-Files.html#Separate-Debug-Files" accesskey="n" rel="next">Separate Debug Files</a>, Previous: <a href="Files.html#Files" accesskey="p" rel="prev">Files</a>, Up: <a href="GDB-Files.html#GDB-Files" accesskey="u" rel="up">GDB Files</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="File-Caching-1"></a>
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<h3 class="section">18.2 File Caching</h3>
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<a name="index-caching-of-opened-files"></a>
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<a name="index-caching-of-bfd-objects"></a>
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<p>To speed up file loading, and reduce memory usage, <small>GDB</small> will
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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
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allow visibility and control of the caching behavior.
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</p>
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<dl compact="compact">
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<dd><a name="index-maint-info-bfds"></a>
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</dd>
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<dt><code>maint info bfds</code></dt>
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<dd><p>This prints information about each <code>bfd</code> object that is known to
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<small>GDB</small>.
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</p>
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<a name="index-maint-set-bfd_002dsharing"></a>
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<a name="index-maint-show-bfd_002dsharing"></a>
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<a name="index-bfd-caching"></a>
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</dd>
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<dt><code>maint set bfd-sharing</code></dt>
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<dt><code>maint show bfd-sharing</code></dt>
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<dd><p>Control whether <code>bfd</code> objects can be shared. When sharing is
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enabled <small>GDB</small> reuses already open <code>bfd</code> objects rather
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than reopening the same file. Turning sharing off does not cause
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already shared <code>bfd</code> objects to be unshared, but all future files
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that are opened will create a new <code>bfd</code> object. Similarly,
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re-enabling sharing does not cause multiple existing <code>bfd</code>
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objects to be collapsed into a single shared <code>bfd</code> object.
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</p>
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<a name="index-set-debug-bfd_002dcache-level"></a>
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<a name="index-bfd-caching-1"></a>
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</dd>
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<dt><code>set debug bfd-cache <var>level</var></code></dt>
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<dd><p>Turns on debugging of the bfd cache, setting the level to <var>level</var>.
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</p>
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<a name="index-show-debug-bfd_002dcache"></a>
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<a name="index-bfd-caching-2"></a>
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</dd>
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<dt><code>show debug bfd-cache</code></dt>
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<dd><p>Show the current debugging level of the bfd cache.
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</p></dd>
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</dl>
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</body>
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</html>
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