I have a fix I think. I found this while working on ilp32 too. Thanks, Andrew
> On Apr 1, 2014, at 8:20 PM, "Michael Hudson-Doyle" > <michael.hud...@canonical.com> wrote: > > Hi all, > > I've just filed a bug on glibc I'd love you to take a look at: > https://sourceware.org/bugzilla/show_bug.cgi?id=16796 > > Here's the description to save clicking: > > Hi, > > There is a test in glibc (tst-tls5) that tests that > ((uintptr_t)pthread_self())%16 is zero. But watch this: > > (t-mwhudson)mwhudson@am1:~$ cat btp.c > #include <stdint.h> > #include <stdio.h> > #include <pthread.h> > > int > main(int argc, char** argv) > { > uintptr_t p = (uintptr_t)__builtin_thread_pointer(); > uintptr_t q = (uintptr_t)pthread_self(); > printf("p: %lx %ld\n", p, p%16); > printf("q: %lx %ld\n", q, q%16); > } > (t-mwhudson)mwhudson@am1:~$ gcc -o btp btp.c -lpthread > (t-mwhudson)mwhudson@am1:~$ ulimit -s unlimited > (t-mwhudson)mwhudson@am1:~$ ./btp > p: 2000028d88 8 > q: 2000028698 8 > (t-mwhudson)mwhudson@am1:~$ ulimit -S -s 8192 > (t-mwhudson)mwhudson@am1:~$ ./btp > p: 7f7fd086f0 0 > q: 7f7fd08000 0 > > So something is clearly wrong; maybe it's just that the test is too > strict, but somehow that seems a bit unlikely. FWIW, this doesn't > happen if you don't link with libpthread so maaaaybe it's a bug in > something that ends up in libpthread's .init section? > > Cheers, > mwh > > _______________________________________________ > linaro-toolchain mailing list > linaro-toolchain@lists.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-toolchain _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
