1.\" Copyright (c) 1983, 1990, 1992, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 4. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)gcore.1 8.2 (Berkeley) 4/18/94 29.\" $FreeBSD: src/usr.bin/gcore/gcore.1,v 1.8.2.5 2002/07/15 06:25:27 keramida Exp $ 30.\" $DragonFly: src/usr.bin/gcore/gcore.1,v 1.2 2003/06/17 04:29:27 dillon Exp $ 31.\" 32.Dd April 18, 1994 33.Dt GCORE 1 34.Os 35.Sh NAME 36.Nm gcore 37.Nd get core images of running process 38.Sh SYNOPSIS 39.Nm 40.Op Fl s 41.Op Fl c Ar core 42.Op Ar executable 43.Ar pid 44.Sh DESCRIPTION 45The 46.Nm 47utility creates a core image of the specified process, 48suitable for use with 49.Xr gdb 1 . 50By default, the core is written to the file 51.Dq Pa core.<pid> . 52The process identifier, 53.Ar pid , 54must be given on the command line. 55If no executable image is 56specified, 57.Nm 58will use 59.Dq Pa /proc/<pid>/file . 60.Pp 61The following options are available: 62.Bl -tag -width indent 63.It Fl c 64Write the core file to the specified file instead of 65.Dq Pa core.<pid> . 66.It Fl s 67Stop the process while gathering the core image, and resume it 68when done. This guarantees that the resulting core dump will 69be in a consistent state. The process is resumed even if it was 70already stopped. 71The same effect can be achieved manually with 72.Xr kill 1 . 73.El 74.Sh FILES 75.Bl -tag -width /var/log/messages -compact 76.It Pa core.<pid> 77the core image 78.It Pa /proc/<pid>/file 79the executable image 80.El 81.Sh HISTORY 82A 83.Nm 84utility appeared in 85.Bx 4.2 . 86.Sh BUGS 87Context switches or paging activity that occur while 88.Nm 89is running may cause the program to become confused. 90For best results, use 91.Fl s 92to temporarily stop the target process. 93.Pp 94The 95.Nm 96utility is not compatible with the original 97.Bx 4.2 98version. 99