75 lines
3.6 KiB
HTML
75 lines
3.6 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Custom Debug Info - Debugging with GDB</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Debugging with GDB">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="JIT-Interface.html#JIT-Interface" title="JIT Interface">
|
|
<link rel="prev" href="Unregistering-Code.html#Unregistering-Code" title="Unregistering Code">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
Copyright (C) 1988-2019 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 ``Free Software'' and ``Free Software Needs
|
|
Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,''
|
|
and with the Back-Cover Texts as in (a) below.
|
|
|
|
(a) The FSF's Back-Cover Text is: ``You are free to copy and modify
|
|
this GNU Manual. Buying copies from GNU Press supports the FSF in
|
|
developing GNU and promoting software freedom.''
|
|
-->
|
|
<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="Custom-Debug-Info"></a>
|
|
<p>
|
|
Previous: <a rel="previous" accesskey="p" href="Unregistering-Code.html#Unregistering-Code">Unregistering Code</a>,
|
|
Up: <a rel="up" accesskey="u" href="JIT-Interface.html#JIT-Interface">JIT Interface</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h3 class="section">29.4 Custom Debug Info</h3>
|
|
|
|
<p><a name="index-custom-JIT-debug-info-3152"></a><a name="index-JIT-debug-info-reader-3153"></a>
|
|
Generating debug information in platform-native file formats (like ELF
|
|
or COFF) may be an overkill for JIT compilers; especially if all the
|
|
debug info is used for is displaying a meaningful backtrace. The
|
|
issue can be resolved by having the JIT writers decide on a debug info
|
|
format and also provide a reader that parses the debug info generated
|
|
by the JIT compiler. This section gives a brief overview on writing
|
|
such a parser. More specific details can be found in the source file
|
|
<samp><span class="file">gdb/jit-reader.in</span></samp>, which is also installed as a header at
|
|
<samp><var>includedir</var><span class="file">/gdb/jit-reader.h</span></samp> for easy inclusion.
|
|
|
|
<p>The reader is implemented as a shared object (so this functionality is
|
|
not available on platforms which don't allow loading shared objects at
|
|
runtime). Two <span class="sc">gdb</span> commands, <code>jit-reader-load</code> and
|
|
<code>jit-reader-unload</code> are provided, to be used to load and unload
|
|
the readers from a preconfigured directory. Once loaded, the shared
|
|
object is used the parse the debug information emitted by the JIT
|
|
compiler.
|
|
|
|
<ul class="menu">
|
|
<li><a accesskey="1" href="Using-JIT-Debug-Info-Readers.html#Using-JIT-Debug-Info-Readers">Using JIT Debug Info Readers</a>: How to use supplied readers correctly
|
|
<li><a accesskey="2" href="Writing-JIT-Debug-Info-Readers.html#Writing-JIT-Debug-Info-Readers">Writing JIT Debug Info Readers</a>: Creating a debug-info reader
|
|
</ul>
|
|
|
|
</body></html>
|
|
|