core(5) BSD File Formats Manual core(5)
NAME
core -- memory image file format
SYNOPSIS
#include <sys/param.h>
DESCRIPTION
A small number of signals which cause abnormal termination of a process
also cause a record of the process's in-core state to be written to disk
for later examination by one of the available debuggers. (See
sigaction(2).) This memory image is written to a file named by default
core.pid, where pid is the process ID of the process, in the /cores
directory, provided the terminated process had write permission in the
directory, and the directory existed.
The maximum size of a core file is limited by setrlimit(2). Files which
would be larger than the limit are not created.
The core file consists of the Mach-O(5) header as described in the
<mach-o/loader.h> file. The remainder of the core file consists of vari-
ous sections described in the Mach-O(5) header.
NOTE
Core dumps are disabled by default under Darwin/Mac OS X. To re-enable
core dumps, a privileged user must do one of the following
* Edit /etc/launchd.conf or $HOME/.launchd.conf and add a line specifying
the limit limit core unlimited
* A privileged user can also enable cores with launchctl limit core
unlimited
* A privileged user can also enable core files by using ulimit(1) or
limit(1) depending upon the shell.
SEE ALSO
gdb(1), setrlimit(2), sigaction(2), Mach-O(5), launchd.conf(5),
launchd.plist(5), sysctl(8)
HISTORY
A core file format appeared in Version 6 AT&T UNIX.
BSD June 26, 2008 BSD
Mac OS X 10.9 - Generated Wed Oct 16 19:25:44 CDT 2013