crash(8) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
CRASH(8)                NetBSD System Manager's Manual                CRASH(8)

crash -- examine and debug system images
crash [-w] [-M core] [-N kernel]
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 break- points, 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
You can obtain a full list of all kernel stack traces with a shell pipe- line like the following: # echo ps | crash | grep '^[0-9]' | cut -c 30-46 | \ sed 's,^,bt/a ,' | crash
ps(1), vmstat(1), ddb(4), pstat(8)
The crash command appeared in NetBSD 6.0.
The crash command for the sparc port is unstable. NetBSD 9.1 March 22, 2019 NetBSD 9.1
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