miniruby segfaults when attempting to install lang/ruby19 or lang/ruby20 on ppc64

[Harry Weppner]

Hi Justin,

thanks for pointing me to the issue you had reported - this patch fixed ruby19.

Thanks & cheerio, Harry.



On Jan 8, 2014, at 10:49 PM, Justin Hibbits <jrh29 at alumni.cwru.edu> wrote:

> Hi,
> 
> On Jan 8, 2014 9:47 PM, "Harry Weppner" <harry.weppner at gmx.net> wrote:
> >
> > Hi,
> >
> > I brought an older dual G5 Powermac back to life and installed FreeBSD 10.0-RC4 on it with a GENERIC ppc64 kernel. When installing lang/ruby19 or lang/ruby20 miniruby segfaults in libthr. Tested with both the default gcc42 as well as with gcc49.
> >
> > Has anyone seen this issue before? T
> >
> > Thanks & cheerio, Harry.
> >
> > (gdb) bt
> > #0  handle_signal (actp=0xffffffffffbfa130, sig=11, info=0xffffffffffbfa690, ucp=0xffffffffffbfa1d0)
> >     at /usr/src/lib/libthr/thread/thr_sig.c:188
> > #1  0x00000000502f36ac in thr_sighandler (sig=11, info=0xffffffffffbfa690, _ucp=0xffffffffffbfa1d0)
> >     at /usr/src/lib/libthr/thread/thr_sig.c:183
> > #2  0xffffffffffffe188 in ?? ()
> >
> >    ┌──/usr/src/lib/libthr/thread/thr_sig.c─────────────────────────────────────────────────────────────────────────┐
> >    │184     }                                                                                                      │
> >    │185                                                                                                            │
> >    │186     static void                                                                                            │
> >    │187     handle_signal(struct sigaction *actp, int sig, siginfo_t *info, ucontext_t *ucp)                       │
> >   >│188     {                                                                                                      │
> >    │189             struct pthread *curthread = _get_curthread();                                                  │
> >
> >
> > The specific instruction is:
> >    ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
> >   >│0x502f32ac <handle_signal+64>   stdu    r1,-1392(r1)                                                           │
> >    │0x502f32b0 <handle_signal+68>   ld      r0,0(r9)                                                               │
> >    │0x502f32b4 <handle_signal+72>   cmpdi   cr7,r0,0                                                               │
> >
> > (gdb) x/x $r1-1392
> > 0xffffffffffbf9b50:     Cannot access memory at address 0xffffffffffbf9b50
> >
> >
> >
> 
> This is a stack overflow problem. I filed a bug report in redmine regarding this. A simp!e workaround is to change the stack size from 3 pages to 4 in thread_pthread.c of ruby and continue building.
> 
> See https://bugs.ruby-lang.org/issues/8783
> 
> -Justin
> 

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