Array not zeroed on creation
Nils Eliasson
nils.eliasson at oracle.com
Fri Sep 7 07:11:30 PDT 2012
The bug reproduces with a fill or a corresponding zeroing for loop. But
not without. So the bug is that there should be a check of uses between
the allocation and the fill (or that the check is incomplete).
//Nils
Vitaly Davidovich skrev 2012-09-07 15:24:
>
> Dan,
>
> I've cc'd compiler dev and removed hotspot dev as this looks like a
> compiler issue. Hope you don't mind.
>
> My hunch is that the Arrays.fill() is tripping this up - is it
> reproducable if fill() is removed?
>
> Sent from my phone
>
> On Sep 7, 2012 8:39 AM, "Dan Hicks" <danhicks at fastmail.fm
> <mailto:danhicks at fastmail.fm>> wrote:
>
> This bug has come to my attention:
> http://stackoverflow.com/questions/12317668/java-int-array-initializes-with-nonzero-elements
>
> Basically there is a reproducible (by several people) situation
> where a new int array is not zeroed. The author reports the error
> is reproducible on HotSpot 64-bit server VM, Java version from
> 1.7.0_04 to 1.7.0_10 on Gentoo Linux, Debian Linux (both kernel
> 3.0 version) and MacOS Lion. (Not tested on 32-bit or Windows.)
>
> Reportedly bug7196857 has been filed with Oracle.
>
> --
> Dan Hicks
> Nothing makes us so lonely as our secrets. --Paul Tournier
>
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