[9] RFR of 8140630: java/nio/Buffer/Basic.java crashes vm on linux-x64 using latest devkit to build

[Brian Burkhalter]

On Nov 4, 2015, at 2:12 PM, Martin Buchholz <martinrb at google.com> wrote:

> At Google, we've also noticed crashes in Bits.c with recent gcc.
> Adding nio-dev, since this is not really a build problem.

Agreed. The posted patch is not intended to be a final solution.

> It appears that Bits.c is resorting to undefined behavior, even though there is a long tradition of unaligned access on x86 being permitted by the hardware.
> 
> My colleague Alexander Smundak has also been looking at this, and is trying to actually fix Bits.c.

Any suggestions here would be welcome.

> I've also been thinking about this a little.  When compiling on x86 with gcc, we might want to use attribute(aligned(...)) to keep gcc from making unwarranted assumptions about alignment.
> 
> I think Andrew Haley has also been thinking about efficient array/buffer operations?

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