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Postings from June 2019
On Fri, 07 Jun 2019 00:25:06 GMT, jkeenan wrote:
> On Fri, 07 Jun 2019 00:00:13 GMT, hv wrote:
> > On Thu, 06 Jun 2019 10:30:58 -0700, jkeenan wrote:
> > > Watchpoint 2: PL_locale_mutex
> > >
> > > Old value = 0x801e1c1e0
> > > New value = 0x2
> > > _pthread_mutex_destroy (mutex=0xa45b28) at pthread_md.h:95
> > > 95 return (TCB_GET64(tcb_thread));
> > > Current language: auto; currently minimal
> > > (gdb) bt
> > > #0 _pthread_mutex_destroy (mutex=0xa45b28) at pthread_md.h:95
> > > #1 0x000000000044c554 in Perl_sys_term () at perl.c:152
> > > #2 0x0000000000421472 in main (argc=<value optimized out>,
> > > argv=<value optimized out>,
> > > env=0x7fffffffe7a0) at perlmain.c:155
> >
> > Ok, we're getting somewhere - somewhere weird, but somewhere.
> >
> > Please could you post the extract from pthread_md.h around line 95,
> > presumably a #define or inline function for _pthread_mutex_destroy?
>
> # /usr/src/lib/libthr/arch/amd64/include/pthread_md.h
> #####
> 92 static __inline struct pthread *
> 93 _get_curthread(void)
> 94 {
> 95 return (TCB_GET64(tcb_thread));
> 96 }
> #####
>
> > If you're also able to find the definition for TCB_GET64 somewhere in the
> > include files (most likely under /usr/include) that would help too.
> >
>
> # /usr/src/lib/libthr/arch/amd64/include/pthread_md.h
> #####
> 65 /*
> 66 * Evaluates to the value of the per-tcb variable name.
> 67 */
> 68 #define TCB_GET64(name) ({ \
> 69 __tcb_type(name) __result; \
> 70 \
> 71 u_long __i; \
> 72 __asm __volatile("movq %%fs:%1, %0" \
> 73 : "=r" (__i) \
> 74 : "m" (*(volatile u_long *)(__tcb_offset(name)))); \
> 75 __result = (__tcb_type(name))__i; \
> 76 \
> 77 __result; \
> 78 })
> #####
hv and I are continuing to investigate this, but any help from someone with access to any of the affected OSes is welcome.
Thank you very much.
--
James E Keenan (jkeenan@cpan.org)
---
via perlbug: queue: perl5 status: open
https://rt.perl.org/Ticket/Display.html?id=134172
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