Generate core dumps of one or more running programs with process
IDs pid1, pid2, etc. A core file produced by gcore is equivalent
to one produced by the kernel when the process crashes (and when
"ulimit -c" was used to set up an appropriate core dump limit).
However, unlike after a crash, after gcore finishes its job the
program remains running without any change.
-a Dump all memory mappings. The actual effect of this option
depends on the Operating System. On GNU/Linux, it will
disable "use-coredump-filter" and enable
The optional argument prefix specifies the prefix to be used
when composing the file names of the core dumps. The file
name is composed as prefix.pid, where pid is the process ID
of the running program being analyzed by gcore. If not
specified, prefix defaults to gcore.
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
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to email@example.com
gdb-10.1 2020-10-24 GCORE(1)