NAME
crash —
examine and debug system
images
SYNOPSIS
crash |
[-w]
[-M core]
[-N
kernel] |
DESCRIPTION
The
crash command is used to examine and debug system images.
If run without any arguments,
crash operates on the running
system.
The options are as follows:
-
-
- -M
core
- Operate on the specified crash dump instead of the default
/dev/mem. Crash dumps should be from the same version of
the system and same machine architecture as the running version of
crash, and must be uncompressed.
-
-
- -N
kernel
- Extract the name list from the specified kernel instead of
the default /dev/ksyms.
-
-
- -w
- Enable writing.
The command syntax used by
crash is the same as the in-kernel
debugger. See the
ddb(4) manual
page for more information.
Operations and facilities that require a running system, such as breakpoints,
are not supported by
crash.
crash does not provide pagination. However, by using the pipe
symbol, output may be sent to commands available from the shell. For example:
crash> ps | more
crash> ps | grep ioflush
SEE ALSO
ps(1),
vmstat(1),
ddb(4),
pstat(8)
HISTORY
The
crash command appeared in
NetBSD
6.0.
BUGS
The
crash command for the sparc port is unstable.