/dev/core "link to program crash data" Post: 302274732

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LEARN ABOUT BSD

crash

CRASH(L)																  CRASH(L)

NAME

       crash - analyze kernel dump or active system image

SYNOPSIS

       crash [ aps ] [ -bdvtiz ] [ -s sfile ] [ -c cfile ] [ -u addr ]

DESCRIPTION

       Synopsis of options -
       -b   Brief mode; skip general display of processes
       -d   Crash dump contains swap image.  (default?)
       -v   Verbose; dump much information about each proc [future]
       -t   TTY structs to be dumpped
       -i   Incore inode table to be printed
       -c FILE	 Provide non-standard file name for system image input
       -s FILE Provide non-standard symboltable input
       -u ADDR	 Trace a process other than currently selected one
       -z   Interrupt Trace displayed
       aps  Print PS & PC at time of interupt (doesn't do anything)

       crash  examines	a  dump  of  unix which it looks for in the file sysdump.  It prints out the contents of the general registers, the kernel
       stack and a traceback through the kernel stack.	If an aps is specified, the ps and pc at time of interrupt are also printed out.  The dump
       of  the	stack commences from a "reasonable" address and all addresses are relocated to virtual addresses by using the value of kdsa6 found
       in the dump.

       The following options may be specified.

       -b     Brief mode; skip general display of processes.  Only the currently selected process will be traced.

       -c cfile
	      If the -c argument is found, the following argument is taken to be the name of a file containing the system image.  The  default	is
	      "/usr/sys/core".

       -s sfile
	      If the -s argument is found the following argument is taken to be the name of a file, containing a symbol table which should be used
	      in interpreting text addresses.  The default is "/unix".

       -u addr
	      Force a process to be displayed as if it were active when the crash occurred.  addr is the octal address of the proc table entry.

FILES

       /unix	     system namelist
       /dev/swap     swap device
       /usr/sys/core core file

SEE ALSO

       crash(8), adb(1), ps(1), rstat(1)

DIAGNOSTICS

       Missing arg Unable to Open file Format Error in symbolfile

BUGS

       Care should be used in running crash on "/dev/mem".  Things can change while crash is running; the picture it gives is only a close approx-
       imation to reality.

AUTHOR

       Mike Muuss, JHU EE
       John Stewart, Teledyne Geotech

								    March 1983								  CRASH(L)