[LTP] [PATCH] sigwaitinfo01: recent glibc calls syscall directly

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> On 2018/09/12 16:09, Jan Stancek wrote:
> > glibc commit
> >    8b0e795aaa44 ("Simplify Linux sig{timed}wait{info} implementations")
> > changed sigwaitinfo to call sigtimedwait, which calls rt_sigtimedwait
> > syscall directly.
> >
> > So, an invalid pointer no longer crashes child process and test
> > reports failure. Fix it by accepting either crash or EFAULT.
> >
> > Signed-off-by: Jan Stancek<jstancek@redhat.com>
> > ---
> >   .../kernel/syscalls/sigwaitinfo/sigwaitinfo01.c    | 29
> >   +++++++++++++++++++---
> >   1 file changed, 25 insertions(+), 4 deletions(-)
> >
> > diff --git a/testcases/kernel/syscalls/sigwaitinfo/sigwaitinfo01.c
> > b/testcases/kernel/syscalls/sigwaitinfo/sigwaitinfo01.c
> > index 95a9436a44c9..02730364db4d 100644
> > --- a/testcases/kernel/syscalls/sigwaitinfo/sigwaitinfo01.c
> > +++ b/testcases/kernel/syscalls/sigwaitinfo/sigwaitinfo01.c
> > @@ -371,19 +371,40 @@ void test_bad_address2(swi_func sigwaitinfo, int
> > signo)
> >   		tst_brkm(TBROK | TERRNO, NULL, "fork() failed");
> >   	case 0:
> >   		signal(SIGSEGV, SIG_DFL);
> > +
> > +		/*
> > +		 * depending on glibc implementation we should
> > +		 * either crash or get EFAULT
> > +		 */
> >   		TEST(sigwaitinfo((void *)1, NULL, NULL));
> >
> > -		_exit(0);
> > +		if (TEST_RETURN == -1&&  TEST_ERRNO == EFAULT)
> > +			_exit(0);
> > +
> > +		tst_resm(TINFO, "swi_func returned: %ld, errno: %d",
> > +			TEST_RETURN, TEST_ERRNO);
> Hi Jan,
> 
> Perhaps, just use tst_resm(TINFO | TTERRNO, "swi_func returned: %ld",
> TEST_RETURN);

Right, pushed with change above.

Regards,
Jan


> 
> Other than that this patch looks good to me, and it works well on glibc
> v2.28.
> 
> Thanks,
> Xiao Yang
> 
> > +		_exit(1);
> >   		break;
> >   	default:
> >   		break;
> >   	}
> >
> >   	SUCCEED_OR_DIE(waitpid, "waitpid failed", pid,&status, 0);
> > -	if (WIFSIGNALED(status)&&  WTERMSIG(status) == SIGSEGV)
> > +
> > +	if ((WIFSIGNALED(status)&&  WTERMSIG(status) == SIGSEGV)
> > +		|| (WIFEXITED(status)&&  WEXITSTATUS(status) == 0)) {
> >   		tst_resm(TPASS, "Test passed");
> > -	else
> > -		tst_resm(TFAIL, "Unrecognised child exit code");
> > +		return;
> > +	}
> > +
> > +	if (WIFEXITED(status)) {
> > +		tst_resm(TFAIL, "Unrecognised child exit code: %d",
> > +			WEXITSTATUS(status));
> > +	}
> > +	if (WIFSIGNALED(status)) {
> > +		tst_resm(TFAIL, "Unrecognised child termsig: %d",
> > +			WTERMSIG(status));
> > +	}
> >   }
> >
> >   void test_bad_address3(swi_func sigwaitinfo, int signo)
> 
> 
> 
>