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103 lines
4.3 KiB
HTML
103 lines
4.3 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>gdb-add-index man (Debugging with GDB)</title>
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<meta name="description" content="gdb-add-index man (Debugging with GDB)">
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<meta name="keywords" content="gdb-add-index man (Debugging with GDB)">
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<meta name="distribution" content="global">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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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="Man-Pages.html#Man-Pages" rel="up" title="Man Pages">
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<link href="Copying.html#Copying" rel="next" title="Copying">
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<link href="gdbinit-man.html#gdbinit-man" rel="prev" title="gdbinit man">
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</style>
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</head>
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<body lang="en">
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<a name="gdb_002dadd_002dindex-man"></a>
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<div class="header">
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<p>
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Previous: <a href="gdbinit-man.html#gdbinit-man" accesskey="p" rel="prev">gdbinit man</a>, Up: <a href="Man-Pages.html#Man-Pages" accesskey="u" rel="up">Man Pages</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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<h4 class="node-heading">gdb-add-index man</h4>
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<a name="gdb_002dadd_002dindex-1"></a>
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<h3 class="heading">gdb-add-index</h3>
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<a name="index-gdb_002dadd_002dindex"></a>
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<a name="gdb_002dadd_002dindex"></a>
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<p>gdb-add-index <var>filename</var>
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</p>
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<p>When <small>GDB</small> finds a symbol file, it scans the symbols in the
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file in order to construct an internal symbol table. This lets most
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<small>GDB</small> operations work quickly–at the cost of a delay early on.
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For large programs, this delay can be quite lengthy, so <small>GDB</small>
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provides a way to build an index, which speeds up startup.
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</p>
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<p>To determine whether a file contains such an index, use the command
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<kbd>readelf -S filename</kbd>: the index is stored in a section named
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<code>.gdb_index</code>. The index file can only be produced on systems
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which use ELF binaries and DWARF debug information (i.e., sections
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named <code>.debug_*</code>).
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</p>
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<p><code>gdb-add-index</code> uses <small>GDB</small> and <code>objdump</code> found
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in the <code>PATH</code> environment variable. If you want to use different
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versions of these programs, you can specify them through the
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<code>GDB</code> and <code>OBJDUMP</code> environment variables.
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</p>
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<p>See more in
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<a href="Index-Files.html#Index-Files">Index Files</a>.
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</p>
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</body>
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</html>
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