You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
3.5 KiB
HTML
81 lines
3.5 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Troubleshooting - GNU Compiler Collection (GCC) Internals</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="GNU Compiler Collection (GCC) Internals">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Type-Information.html#Type-Information" title="Type Information">
|
|
<link rel="prev" href="Invoking-the-garbage-collector.html#Invoking-the-garbage-collector" title="Invoking the garbage collector">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
Copyright (C) 1988-2015 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
|
any later version published by the Free Software Foundation; with the
|
|
Invariant Sections being ``Funding Free Software'', the Front-Cover
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
|
(see below). A copy of the license is included in the section entitled
|
|
``GNU Free Documentation License''.
|
|
|
|
(a) The FSF's Front-Cover Text is:
|
|
|
|
A GNU Manual
|
|
|
|
(b) The FSF's Back-Cover Text is:
|
|
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
|
software. Copies published by the Free Software Foundation raise
|
|
funds for GNU development.-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family:serif; font-weight:normal; }
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<a name="Troubleshooting"></a>
|
|
<p>
|
|
Previous: <a rel="previous" accesskey="p" href="Invoking-the-garbage-collector.html#Invoking-the-garbage-collector">Invoking the garbage collector</a>,
|
|
Up: <a rel="up" accesskey="u" href="Type-Information.html#Type-Information">Type Information</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h3 class="section">22.7 Troubleshooting the garbage collector</h3>
|
|
|
|
<p><a name="index-garbage-collector_002c-troubleshooting-5101"></a>
|
|
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.
|
|
|
|
<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>Link-time errors about undefined <code>gt_ggc_r_foo_bar</code> and
|
|
similarly-named symbols. Check if your <samp><span class="file">foo_bar</span></samp> source file has
|
|
<code>#include "gt-foo_bar.h"</code> as its very last line.
|
|
|
|
</ul>
|
|
|
|
<!-- Copyright (C) 2009-2015 Free Software Foundation, Inc. -->
|
|
<!-- Free Software Foundation, Inc. -->
|
|
<!-- This is part of the GCC manual. -->
|
|
<!-- For copying conditions, see the file gcc.texi. -->
|
|
</body></html>
|
|
|