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PANIC(9) NetBSD Kernel Developer's Manual PANIC(9)
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Maintained for NetBSD
by Kimmo Suominen.
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panic -- Bring down system on fatal error
panic(const char *fmt, ...);
The panic() function terminates the NetBSD system. The message fmt is a
printf(3) style format string which is printed to the console and saved
in the variable panicstr for later retrieval via core dump inspection. A
newline character is added at the end automatically, and is thus not
needed in the format string.
If a kernel debugger is installed, control is passed to it after the mes-
sage is printed. If the kernel debugger is ddb(4), control may be passed
to it, depending on the value of ddb.onpanic. See options(4) for more
details on setting ddb.onpanic. If control is not passed through to
ddb(4), a ddb(4)-specific function is used to print the kernel stack
trace, and then control returns to panic().
If control remains in panic(), an attempt is made to save an image of
system memory on the configured dump device.
If during the process of handling the panic, panic() is called again
(from the filesystem synchronization routines, for example), the system
is rebooted immediately without synchronizing any filesystems.
The panic() function does not return.
sysctl(3), ddb(4), ipkdb(4), options(4), savecore(8), swapctl(8),
NetBSD 5.0 January 28, 2006 NetBSD 5.0