JDK-8160363: assert(discovered->is_oop_or_null()) failed: Expected an oop or NULL for discovered field at 0x0000000000000000

[Yasumasa Suenaga]

2016/06/28 0:08 "Dmitry Samersoff" <dmitry.samersoff at oracle.com>:
>
> Yasumasa,
>
> Statements below
>
> return this == NULL ? true : is_oop(ignore_mark_word);
>
> and
>
> return (this == NULL) || is_oop(ignore_mark_word);
>
> looks equivalent for me.

Me too.
But return this == NULL ? true : is_oop(ignore_mark_word); does not work...

Yasumasa

> -Dmitry
>
> On 2016-06-27 17:41, Yasumasa Suenaga wrote:
> > Hi all,
> >
> > This review request relates to JDK-8160310: HotSpot cannot be built with
> > GCC 6 .
> >
> > I encountered VM crash when I compiled OpenJDK 9 with GCC 6
> > on Fedora 24 x64.
> >
> > Address of pointer was expected (0x0), however is_oop_or_null() did not
> > work.
> > I do not understand why current code did not work, however it works fine
> > as below:
> >
> >   http://cr.openjdk.java.net/~ysuenaga/JDK-8160363/webrev.00/
> >
> >
> > Please discuss about it.
> >
> >
> > Thanks,
> >
> > Yasumasa
> >
> >
>
>
> --
> Dmitry Samersoff
> Oracle Java development team, Saint Petersburg, Russia
> * I would love to change the world, but they won't give me the sources.