When GDB finds a symbol file, it scans the symbols in the file in
order to construct an internal symbol table. This lets most GDB
operations work quickly--at the cost of a delay early on. For
large programs, this delay can be quite lengthy, so GDB provides
a way to build an index, which speeds up startup.
To determine whether a file contains such an index, use the
command "readelf -S filename": the index is stored in a section
named ".gdb_index". The index file can only be produced on
systems which use ELF binaries and DWARF debug information (i.e.,
sections named ".debug_*").
gdb-add-index uses GDB and objdump found in the PATH environment
variable. If you want to use different versions of these
programs, you can specify them through the GDB and OBJDUMP
See more in the GDB manual in node "Index Files" -- shell command
"info -f gdb -n "Index Files"".
The full documentation for GDB is maintained as a Texinfo manual.
If the "info" and "gdb" programs and GDB's Texinfo documentation
are properly installed at your site, the command
should give you access to the complete manual.
Using GDB: A Guide to the GNU Source-Level Debugger, Richard M.
Stallman and Roland H. Pesch, July 1991.
Copyright (c) 1988-2020 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) 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."
This page is part of the gdb (GNU debugger) project. Information
about the project can be found at
⟨http://www.gnu.org/software/gdb/⟩. If you have a bug report for
this manual page, see ⟨http://www.gnu.org/software/gdb/bugs/⟩.
This page was obtained from the tarball gdb-10.1.tar.gz fetched
from ⟨https://ftp.gnu.org/gnu/gdb/⟩ on 2021-04-01. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
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gdb-10.1 2020-10-24 GDB-ADD-INDEX(1)