842ab62b05
This change implements a notification (via devctl) to userland when the kernel produces coredumps after a process has crashed. devd can then run a specific command to produce a human readable crash report. The command is most usually a helper that runs gdb/lldb commands on the file/coredump pair. It's possible to use this functionality for implementing automatic generation of crash reports. devd(8) will be notified of the full path of the binary that crashed and the full path of the coredump file.