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.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)gcore.1 8.2 (Berkeley) 4/18/94 33.\" $FreeBSD: src/usr.bin/gcore/gcore.1,v 1.8.2.5 2002/07/15 06:25:27 keramida Exp $ 34.\" $DragonFly: src/usr.bin/gcore/gcore.1,v 1.2 2003/06/17 04:29:27 dillon Exp $ 35.\" 36.Dd April 18, 1994 37.Dt GCORE 1 38.Os 39.Sh NAME 40.Nm gcore 41.Nd get core images of running process 42.Sh SYNOPSIS 43.Nm 44.Op Fl s 45.Op Fl c Ar core 46.Op Ar executable 47.Ar pid 48.Sh DESCRIPTION 49The 50.Nm 51utility creates a core image of the specified process, 52suitable for use with 53.Xr gdb 1 . 54By default, the core is written to the file 55.Dq Pa core.<pid> . 56The process identifier, 57.Ar pid , 58must be given on the command line. 59If no executable image is 60specified, 61.Nm 62will use 63.Dq Pa /proc/<pid>/file . 64.Pp 65The following options are available: 66.Bl -tag -width indent 67.It Fl c 68Write the core file to the specified file instead of 69.Dq Pa core.<pid> . 70.It Fl s 71Stop the process while gathering the core image, and resume it 72when done. This guarantees that the resulting core dump will 73be in a consistent state. The process is resumed even if it was 74already stopped. 75The same effect can be achieved manually with 76.Xr kill 1 . 77.El 78.Sh FILES 79.Bl -tag -width /var/log/messages -compact 80.It Pa core.<pid> 81the core image 82.It Pa /proc/<pid>/file 83the executable image 84.El 85.Sh HISTORY 86A 87.Nm 88utility appeared in 89.Bx 4.2 . 90.Sh BUGS 91Context switches or paging activity that occur while 92.Nm 93is running may cause the program to become confused. 94For best results, use 95.Fl s 96to temporarily stop the target process. 97.Pp 98The 99.Nm 100utility is not compatible with the original 101.Bx 4.2 102version. 103