svn commit: r212630 - in head/lib/libthr: . thread

[Kostik Belousov]

On Wed, Sep 15, 2010 at 11:19:52AM +0000, David Xu wrote:
> Alexander Kabaev wrote:
> >On Wed, 15 Sep 2010 02:56:33 +0000 (UTC)
> >David Xu <davidxu at FreeBSD.org> wrote:
> >
> >>Author: davidxu
> >>Date: Wed Sep 15 02:56:32 2010
> >>New Revision: 212630
> >>URL: http://svn.freebsd.org/changeset/base/212630
> >>
> >>Log:
> >>  add code to support stack unwinding when thread exits. note that
> >>only defer-mode cancellation works, asynchrnous mode does not work
> >>because it lacks of libuwind's support. stack unwinding is not
> >>enabled unless LIBTHR_UNWIND_STACK is defined in Makefile.
> >>
> >>Modified:
> >>  head/lib/libthr/Makefile
> >>  head/lib/libthr/thread/thr_clean.c
> >>  head/lib/libthr/thread/thr_create.c
> >>  head/lib/libthr/thread/thr_exit.c
> >>  head/lib/libthr/thread/thr_init.c
> >>  head/lib/libthr/thread/thr_private.h
> >>
> >>Modified: head/lib/libthr/Makefile
> >>==============================================================================
> >>--- head/lib/libthr/Makefile	Wed Sep 15 01:21:30 2010
> >>(r212629) +++ head/lib/libthr/Makefile	Wed Sep 15 02:56:32
> >>2010	(r212630) @@ -25,6 +25,14 @@
> >>CFLAGS+=-I${.CURDIR}/../../libexec/rtld-
> >>CFLAGS+=-I${.CURDIR}/../../libexec/rtld-elf/${MACHINE_CPUARCH}
> >>CFLAGS+=-I${.CURDIR}/../libthread_db CFLAGS+=-Winline
> >>+
> >>+LIBTHR_UNWIND_STACK=yes
> >>+
> >>+.ifdef LIBTHR_UNWIND_STACK
> >>+CFLAGS+=-I${.CURDIR}/../../contrib/gcc -fexceptions 
> >>+CFLAGS+=-D_PTHREAD_FORCED_UNWIND
> >>+.endif
> >>+
> >>
> >
> >Reaching into bowels of GCC like that is never good.
> Any solution ? ;-)
> 
I think the used interfaces are part of the C++ ABI. As such, we can
expect them to be present from the runtime support, and provide our
own declarations in freebsd-implemented headers.
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