gcore(1) — Linux manual page


GCORE(1)                  GNU Development Tools                 GCORE(1)

NAME         top

       gcore - Generate a core file of a running program

SYNOPSIS         top

       gcore [-a] [-o prefix] pid1 [pid2...pidN]

DESCRIPTION         top

       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.

OPTIONS         top

       -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

       -o prefix
           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.

SEE ALSO         top

       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

               info gdb

       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         top

       Copyright (c) 1988-2023 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."

COLOPHON         top

       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-14.1.tar.gz fetched
       from ⟨https://ftp.gnu.org/gnu/gdb/⟩ on 2023-12-22.  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 man-pages@man7.org

gdb-14.1                       2023-12-03                       GCORE(1)