Messages in this thread | | | Date | Tue, 24 May 2005 17:14:50 -0400 (EDT) | From | "Richard B. Johnson" <> | Subject | Re: trouble trapping SEGV on 2.6.11.2 & 2.6.12-rc4 |
| |
To jump out of signal handlers, you now need sigsetjmp() and siglongjmp().
On Tue, 24 May 2005, Clifford T. Matthews wrote:
> The included program dies with a SEGV under 2.6.11.2 and 2.6.12-rc4. > It doesn't die under 2.4.25. I compiled the kernels myself. The > distribution is Fedora Core release 3, with glibc 2.3.5. > > I don't have any earlier 2.6 kernels to test it on, so I have no idea > when this bug first appeared. > > I only skim LKML through fa.linux.kernel, so please CC me on any reply > that I should see. > > --Cliff Matthews <ctm@ardi.com> > +1 505 363 5754 Cell > > #include <stdio.h> > #include <unistd.h> > #include <sys/mman.h> > #include <stdbool.h> > #include <assert.h> > #include <setjmp.h> > #include <signal.h> > > static jmp_buf segv_return; > > static void > segv_handler (int signum_ignored __attribute__((unused))) > { > longjmp (segv_return, 1); > } > > int > main (void) > { > volatile char *volatile addr; > volatile int n_failures; > > addr = (void *) 0x10000L; > n_failures = 0; > > signal (SIGSEGV, segv_handler); > if (setjmp (segv_return) != 0) > ++n_failures; > else > *addr; > > printf ("n_failures = %d\n", n_failures); > > if (setjmp (segv_return) != 0) > ++n_failures; > else > *addr; > > printf ("n_failures = %d\n", n_failures); > > return 0; > } > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
Cheers, Dick Johnson Penguin : Linux version 2.6.11.9 on an i686 machine (5537.79 BogoMips). Notice : All mail here is now cached for review by Dictator Bush. 98.36% of all statistics are fiction. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |