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 "dump-excluded-mappings".
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) 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."
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-9.2.tar.gz fetched from
⟨https://ftp.gnu.org/gnu/gdb/⟩ on 2020-06-09. If you discover any
rendering problems in this HTML version of the page, or you believe
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corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
gdb-9.2 2020-05-23 GCORE(1)