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KASSERT (9)

>> KASSERT (9) ( FreeBSD man: Ядро )

BSD mandoc

NAME

KASSERT

 - kernel expression verification macro

SYNOPSIS

options INVARIANTS

#include <sys/param.h>
#include <sys/systm.h>
KASSERT (expression msg);

DESCRIPTION

In a kernel compiled with options INVARIANTS the KASSERT ();
macro tests the given Fa expression and if it is false, calls the panic(9) function, terminating the running system.

In a kernel that does not have options INVARIANTS the KASSERT ();
macro is defined to be a no-op. The second argument is a printf(9) format string and its arguments, enclosed in parentheses.

EXAMPLES

The kernel function vput ();
must not be called with a NULL pointer.

void
vput(vp)
        struct vnode *vp;
{
        struct proc *p = curproc;
        KASSERT(vp != NULL, ("vput: null vp"));
        ...
}

AUTHORS

This manual page was written by An Jonathan M. Bresler Aq jmb@FreeBSD.org .

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