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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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| <a name="Troubleshooting-the-garbage-collector"></a> |
| <h3 class="section">22.7 Troubleshooting the garbage collector</h3> |
| <a name="index-garbage-collector_002c-troubleshooting"></a> |
| |
| <p>With the current garbage collector implementation, most issues should |
| show up as GCC compilation errors. Some of the most commonly |
| encountered issues are described below. |
| </p> |
| <ul> |
| <li> Gengtype does not produce allocators for a <code>GTY</code>-marked type. |
| Gengtype checks if there is at least one possible path from GC roots to |
| at least one instance of each type before outputting allocators. If |
| there is no such path, the <code>GTY</code> markers will be ignored and no |
| allocators will be output. Solve this by making sure that there exists |
| at least one such path. If creating it is unfeasible or raises a “code |
| smell”, consider if you really must use GC for allocating such type. |
| |
| </li><li> Link-time errors about undefined <code>gt_ggc_r_foo_bar</code> and |
| similarly-named symbols. Check if your <samp>foo_bar</samp> source file has |
| <code>#include "gt-foo_bar.h"</code> as its very last line. |
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