You've done absolutely nothing to justify it.
> Maybe I'm missing something, but it makes sense to me to log SEGV and
> friends in the same manner pledge(2) kills are logged.
>
> Index: kern/kern_sig.c
> ===================================================================
> RCS file: /cvs/src/sys/kern/kern_sig.c,v
> retrieving revision 1.212
> diff -u -p -u -r1.212 kern_sig.c
> --- kern/kern_sig.c 8 Jun 2017 17:14:02 -0000 1.212
> +++ kern/kern_sig.c 6 Dec 2017 04:33:49 -0000
> @@ -39,7 +39,9 @@
> */
>
> #define SIGPROP /* include signal properties table */
> +#define SIG_NAMES /* include signal names for logging */
> #include <sys/param.h>
> +#include <sys/signal.h>
> #include <sys/signalvar.h>
> #include <sys/resourcevar.h>
> #include <sys/queue.h>
> @@ -758,6 +760,9 @@ trapsignal(struct proc *p, int signum, u
> struct process *pr = p->p_p;
> struct sigacts *ps = pr->ps_sigacts;
> int mask;
> +
> + log(LOG_ERR, "%s(%d): trap signal %d \"%s\"\n", p->p_p->ps_comm,
> + p->p_p->ps_pid, signum, sig_names[signum]);
>
> switch (signum) {
> case SIGILL:
> Index: sys/signal.h
> ===================================================================
> RCS file: /cvs/src/sys/sys/signal.h,v
> retrieving revision 1.26
> diff -u -p -u -r1.26 signal.h
> --- sys/signal.h 29 Apr 2013 17:06:20 -0000 1.26
> +++ sys/signal.h 6 Dec 2017 04:33:49 -0000
> @@ -90,6 +90,44 @@
> #define SIGTHR 32 /* thread library AST */
> #endif
>
> +#ifdef SIG_NAMES
> +char* sig_names[NSIG + 1] = {
> + "",
> + "SIGHUP",
> + "SIGINT",
> + "SIGQUIT",
> + "SIGILL",
> + "SIGTRAP",
> + "SIGABRT",
> + "SIGEMT",
> + "SIGFPE",
> + "SIGKILL",
> + "SIGBUS",
> + "SIGSEGV",
> + "SIGSYS",
> + "SIGPIPE",
> + "SIGALRM",
> + "SIGTERM",
> + "SIGURG",
> + "SIGSTOP",
> + "SIGTSTP",
> + "SIGCONT",
> + "SIGCHLD",
> + "SIGTTIN",
> + "SIGTTOU",
> + "SIGIO",
> + "SIGXCPU",
> + "SIGXFSZ",
> + "SIGVTALRM",
> + "SIGPROF",
> + "SIGWINCH",
> + "SIGINFO",
> + "SIGUSR1",
> + "SIGUSR2",
> + "SIGTHR"
> +};
> +#endif
> +
> /*
> * Language spec says we must list exactly one parameter, even though we
> * actually supply three. Ugh!
>
