On Fri, Jan 16, 2009 at 12:41 AM, Garrett Cooper <yanef...@gmail.com> wrote: > Hi amd64 and Hackers, > Uh, I'm really confused why 1) this error (errno => ENOMEM) would > occur when I have more than enough free memory (both on x86 and amd64) > and 2) why strerror would segfault in the call to errx in the attached > sourcefile on amd64 only. Not initializing len causes the second > output sample (errno => 14, which is EFAULT). > Any ideas? > Please CC me if mailing on amd64@ as I'm not subscribed to the list. > Thanks, > -Garrett > > /* Program */ > #include <err.h> > #include <errno.h> > #include <stdio.h> > #include <sys/types.h> > #include <sys/sysctl.h> > > int > main() { > > int mib[4]; > > size_t len; > > if (sysctlnametomib("kern.ipc.shmmax", mib, &len) != 0) { > printf("Errno: %d\n", errno); > errx(errno, "Error: %s", strerror(errno)); > } > > printf("%lu\n", len); > > return 0; > > } > > # output for len preset to 0: > [gcoo...@optimus ~]$ ./test2 > Errno: 12 > test2: Segmentation fault: 11 (core dumped) > [gcoo...@optimus ~]$ uname -a > FreeBSD optimus.gateway.2wire.net 8.0-CURRENT FreeBSD 8.0-CURRENT #4: > Sun Jan 11 12:30:31 PST 2009 > r...@optimus.gateway.2wire.net:/usr/obj/usr/src/sys/OPTIMUS amd64 > > [gcoo...@orangebox /usr/home/gcooper]$ ./test > Errno: 12 > test: Error: Cannot allocate memory > [gcoo...@orangebox /usr/home/gcooper]$ uname -a > FreeBSD orangebox.gateway.2wire.net 8.0-CURRENT FreeBSD 8.0-CURRENT > #4: Sat Jan 3 22:54:52 PST 2009 > gcoo...@orangebox.gateway.2wire.net:/usr/obj/usr/src/sys/ORANGEBOX > i386 > > # output for len not preset to 0: > [gcoo...@optimus ~]$ ./test2 > Errno: 14 > test2: Segmentation fault: 11 (core dumped)
Almost forgot -- here are the actual values reported by sysctl(1), just for reference: [gcoo...@optimus ~]$ sysctl kern.ipc.shmall kern.ipc.shmmin kern.ipc.shmmax kern.ipc.shmall: 8192 kern.ipc.shmmin: 1 kern.ipc.shmmax: 33554432 [gcoo...@orangebox /usr/src/sys]$ sysctl kern.ipc.shmall kern.ipc.shmmin kern.ipc.shmmax kern.ipc.shmall: 8192 kern.ipc.shmmin: 1 kern.ipc.shmmax: 33554432 Thanks, -Garrett _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"