105 lines
4.6 KiB
HTML
105 lines
4.6 KiB
HTML
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<head>
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<title>GNU Compiler Collection (GCC) Internals: Troubleshooting</title>
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Type-Information.html#Type-Information" rel="up" title="Type Information">
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<link href="Plugins.html#Plugins" rel="next" title="Plugins">
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<a name="Troubleshooting"></a>
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<div class="header">
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<p>
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Previous: <a href="Invoking-the-garbage-collector.html#Invoking-the-garbage-collector" accesskey="p" rel="prev">Invoking the garbage collector</a>, Up: <a href="Type-Information.html#Type-Information" accesskey="u" rel="up">Type Information</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Troubleshooting-the-garbage-collector"></a>
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<h3 class="section">22.7 Troubleshooting the garbage collector</h3>
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<a name="index-garbage-collector_002c-troubleshooting"></a>
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<p>With the current garbage collector implementation, most issues should
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show up as GCC compilation errors. Some of the most commonly
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encountered issues are described below.
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</p>
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<ul>
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<li> Gengtype does not produce allocators for a <code>GTY</code>-marked type.
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Gengtype checks if there is at least one possible path from GC roots to
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at least one instance of each type before outputting allocators. If
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there is no such path, the <code>GTY</code> markers will be ignored and no
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allocators will be output. Solve this by making sure that there exists
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at least one such path. If creating it is unfeasible or raises a “code
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smell”, consider if you really must use GC for allocating such type.
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</li><li> Link-time errors about undefined <code>gt_ggc_r_foo_bar</code> and
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similarly-named symbols. Check if your <samp>foo_bar</samp> source file has
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<code>#include "gt-foo_bar.h"</code> as its very last line.
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</li></ul>
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