[libc-alpha] linuxthreads bug in 2.2.4 under ppc linux
Kevin B. Hendricks
kevin.hendricks@sympatico.ca
Sat Dec 8 17:24:00 GMT 2001
Hi Franz,
Okay, I am down to just rebuilding libpthread.so.
If I compile linuxthreads with -O1 or -O2 I can not make it fail.
If I compile linuxthreads with -O3 it fails in exactly the place I
described earlier.
So the question is:
Is this a ppc linux specific gcc compiler issue at -O3
with something being rescheduled that should not be?
or
Is the bug in glibc-2.2.4, and the change in optimization just changes the
timing to avoid or create the problem?
I am going to diff the objdump from lipthread.so with -O2 and -O3 in
pthread_alt_lock and pthread_alt_unlock to see is anything jumps out at me.
I will let you know what if anything I find.
It is nice to know that just lowering the optimization level to -O2 from
-O3 for just linuxthreads seems to workaround the issue.
Thanks,
Kevin
More information about the Libc-alpha
mailing list