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.\" $FreeBSD$ 34.\" 35.Dd April 18, 1994 36.Dt GCORE 1 37.Os 38.Sh NAME 39.Nm gcore 40.Nd get core images of running process 41.Sh SYNOPSIS 42.Nm 43.Op Fl s 44.Op Fl c Ar core 45.Op Ar executable 46.Ar pid 47.Sh DESCRIPTION 48The 49.Nm 50utility creates a core image of the specified process, 51suitable for use with 52.Xr gdb 1 . 53By default, the core is written to the file 54.Dq Pa core.<pid> . 55The process identifier, 56.Ar pid , 57must be given on the command line. 58If no executable image is 59specified, 60.Nm 61will use 62.Dq Pa /proc/<pid>/file . 63.Pp 64The following options are available: 65.Bl -tag -width indent 66.It Fl c 67Write the core file to the specified file instead of 68.Dq Pa core.<pid> . 69.It Fl s 70Stop the process while gathering the core image, and resume it 71when done. This guarantees that the resulting core dump will 72be in a consistent state. The process is resumed even if it was 73already stopped. 74The same effect can be achieved manually with 75.Xr kill 1 . 76.El 77.Sh FILES 78.Bl -tag -width /var/log/messages -compact 79.It Pa core.<pid> 80the core image 81.It Pa /proc/<pid>/file 82the executable image 83.El 84.Sh HISTORY 85A 86.Nm 87utility appeared in 88.Bx 4.2 . 89.Sh BUGS 90Context switches or paging activity that occur while 91.Nm 92is running may cause the program to become confused. 93For best results, use 94.Fl s 95to temporarily stop the target process. 96.Pp 97The 98.Nm 99utility is not compatible with the original 100.Bx 4.2 101version. 102