xref: /freebsd/usr.bin/gcore/gcore.1 (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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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.
72This guarantees that the resulting core dump will
73be in a consistent state.
74The process is resumed even if it was
75already stopped.
76The same effect can be achieved manually with
77.Xr kill 1 .
78.El
79.Sh FILES
80.Bl -tag -width /var/log/messages -compact
81.It Pa core.<pid>
82the core image
83.It Pa /proc/<pid>/file
84the executable image
85.El
86.Sh HISTORY
87A
88.Nm
89utility appeared in
90.Bx 4.2 .
91.Sh BUGS
92Context switches or paging activity that occur while
93.Nm
94is running may cause the program to become confused.
95For best results, use
96.Fl s
97to temporarily stop the target process.
98.Pp
99The
100.Nm
101utility is not compatible with the original
102.Bx 4.2
103version.
104