sqlplus segfaults when receiving INT signal
Chagin Dmitry
dchagin at freebsd.org
Wed Sep 17 05:17:01 UTC 2008
On Mon, Sep 15, 2008 at 10:44:00PM +0200, Roman Divacky wrote:
> On Mon, Sep 15, 2008 at 07:48:11PM +0400, Chagin Dmitry wrote:
> > On Sun, Sep 14, 2008 at 08:49:33PM +0200, Roman Divacky wrote:
> > > On Sun, Sep 14, 2008 at 01:25:19PM +0400, Chagin Dmitry wrote:
> > > > >
> > > > > please provide ktrace/linux_kdump... the "unknown futex operation" problem is fixed
> > > > > in this release so there must be something else
> > > >
> > > > 1428 sqlplus 0.874520 CALL munmap(0x28066000,0xc41d)
> > > > 1428 sqlplus 0.874543 RET munmap 0
> > > > 1428 sqlplus 0.874553 CALL linux_set_tid_address(0x292cf708)
> > > > 1428 sqlplus 0.874563 RET linux_set_tid_address 1428/0x594
> > > > 1428 sqlplus 0.874572 CALL linux_set_robust_list(0x292cf710,0xc)
> > > > 1428 sqlplus 0.874580 RET linux_set_robust_list -1 errno 22 (EINVAL) Invali
> > > > d argument
> > > > 1428 sqlplus 0.874596 CALL linux_sys_futex(0xffffdbc4,FUTEX_WAKE|FUTEX_PRIVA
> > > > TE_FLAG,0x1,0x292cf6c0,0x29154ff4,0xffffdbd8)
> > > > 1428 sqlplus 0.874608 RET linux_sys_futex 1
> > > > 1428 sqlplus 0.874641 CALL linux_rt_sigaction(SIG 32,0xffffd87c,0,0x8)
> > > > 1428 sqlplus 0.874651 RET linux_rt_sigaction 0
> > >
> > > the robust futexes are also implemented in -CURRENT but I dont feel like
> > > MFcing them.... the error is also harmless
> >
> > it amd64, so, set_robust_list() here does not work. look at a patch bellow,
> > I show it for example only because I don't understand how futexes work :)
> >
> >
> > diff --git a/src/sys/compat/linux/linux_futex.c b/src/sys/compat/linux/linux_futex.c
> > index 6588d23..73cf3a7 100644
> > --- a/src/sys/compat/linux/linux_futex.c
> > +++ b/src/sys/compat/linux/linux_futex.c
> > @@ -551,7 +551,7 @@ linux_set_robust_list(struct thread *td, struct linux_set_robust_list_args *args
> > return (EINVAL);
> >
> > em = em_find(td->td_proc, EMUL_DOLOCK);
> > - em->robust_futexes = args->head;
> > + em->robust_futexes = PTRIN(args->head);
> > EMUL_UNLOCK(&emul_lock);
> >
> > return (0);
> > @@ -661,17 +661,17 @@ release_futexes(struct proc *p)
> > if (head == NULL)
> > return;
> >
> > - if (fetch_robust_entry(&entry, &head->list.next, &pi))
> > + if (fetch_robust_entry(&entry, PTRIN(&head->list.next), &pi))
> > return;
> >
> > if (copyin(&head->futex_offset, &futex_offset, sizeof(l_ulong)))
> > return;
> >
> > - if (fetch_robust_entry(&pending, &head->pending_list, &pip))
> > + if (fetch_robust_entry(&pending, PTRIN(&head->pending_list), &pip))
> > return;
> >
> > while (entry != &head->list) {
> > - rc = fetch_robust_entry(&next_entry, &entry->next, &next_pi);
> > + rc = fetch_robust_entry(&next_entry, PTRIN(&entry->next), &next_pi);
> >
> > if (entry != pending)
> > if (handle_futex_death((char *)entry + futex_offset,
> > diff --git a/src/sys/compat/linux/linux_futex.h b/src/sys/compat/linux/linux_futex.h
> > index f6a2d4b..67b5115 100644
> > --- a/src/sys/compat/linux/linux_futex.h
> > +++ b/src/sys/compat/linux/linux_futex.h
> > @@ -66,14 +66,22 @@
> > /* This is defined by Linux user-space */
> >
> > struct linux_robust_list {
> > - struct linux_robust_list *next;
> > -};
> > + l_uintptr_t next;
> > +}
> > +#if defined(__amd64__) && defined(COMPAT_LINUX32)
> > +__packed
> > +#endif
> > +;
> >
> > struct linux_robust_list_head {
> > struct linux_robust_list list;
> > l_ulong futex_offset;
> > - struct linux_robust_list *pending_list;
> > -};
> > + l_uintptr_t pending_list;
> > +}
> > +#if defined(__amd64__) && defined(COMPAT_LINUX32)
> > +__packed
> > +#endif
> > +;
> >
> > #define FUTEX_WAITERS 0x80000000
> > #define FUTEX_OWNER_DIED 0x40000000
>
> this looks about right... I'll ask kostik to commit this,
>
I think that better if to move definitions of structures to linux.h
> dmitry, you should have commit bit :)
i'm ready :)
thnx!
--
Have fun!
chd
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