Re: [LTP] Compile failure with rt_sigaction on amd64

[Subrata Modak <subrata@linux.vnet.ibm.com>]

On Fri, 2009-07-10 at 14:31 +0530, naresh kamboju wrote: 
> Garrett,
> 
> On Fri, Jul 10, 2009 at 10:22 AM, Masatake YAMATO<yamato@redhat.com> wrote:
> > I've found an interesting code in glibc about "rt_sigaction".
> >
> > sysdeps/unix/sysv/linux/x86_64/sigaction.c:
> > int
> > __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
> >
> >
> >
> > How do you think follow the way to glibc?
> > In addition man page is needed to update.
> >
> > Masatake YAMATO
> >
> 
> Garrett Cooper <yanegomi@gmail.com> wrote:
> >>gcooper@orangebox /scratch/ltp-vanilla/ltp $ /lib/libc.so.6
> >>GNU C Library stable release version 2.9, by Roland McGrath >>et al.
> 
> >>I'm confused -- how will that help us?
> 
> To conform glibc version you are using is 2.9
> 
> >>gcooper@orangebox /scratch/ltp-vanilla/ltp $ gdb
> >>This GDB was configured as "x86_64-pc-linux-gnu"...
> >>(gdb) r
> >>Starting program:
> >>/scratch/ltp-vanilla/ltp/testcases/kernel/syscalls/rt_sigaction>>/rt_sigaction01
> >>rt_sigaction01    0  INFO  :  signal: 34
> >>rt_sigaction01    1  PASS  :  rt_sigaction call succeeded: >>result = 0
> >>rt_sigaction01    0  INFO  :  sa.sa_flags = >>SA_RESETHAND|SA_SIGINFO
> 
> >>Program received signal SIG34, Real-time event 34.
> >>0x00007f770ba0b4f7 in kill () from /lib/libc.so.6
> >>(gdb) where
> >>#0  0x00007f770ba0b4f7 in kill () from /lib/libc.so.6
> >>#1  0x0000000000401c3e in main ()
> >>(gdb)
> 
> 
> As you said in the pervious mail when you try to debug using gdb you
> got a segmentation falut from /lib/libc.so.6.
> 
> So that segmentation fault is generated by glibc.
> 
> 
> As per Masatake YAMATO comments,
> glibc code implementation for libc/sysdeps/unix/sysv/linux/x86_64/sigaction.c
> 
> X86_64:
> 
> http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/linux/x86_64/sigaction.c?annotate=1.8.2.4&cvsroot=glibc
> 
> X86:
> 
> http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/linux/sigaction.c?annotate=1.24.2.2&cvsroot=glibc
> 
> Thanks Masatake YAMATO for your information.
> 
> However, before concluding problem/issue need some more Investigation
> Please remove
> -kill(getpid(),signal);
> from rt_sigaction01.c
> And complie and execute and share the results.

I will wait for any of your patches till you investigate all issues.

Regards--
Subrata

> 
> Best regards,
> Naresh Kamboju


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