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 "dump-excluded-mappings".

       -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) 1988-2020 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) 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

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gdb-9.2                          2020-05-23                         GCORE(1)