[RFR] (XS) 8087153: EXCEPTION_ACCESS_VIOLATION when CDS RO section vanished on win32

[David Holmes]

Chris,

Could you please update the bug report with a conclusion because I can't 
follow the twists in the plot with this one. We were going to just use 
protect_memory then that was dropped. I'm not sure what we are doing now.

Thanks,
David

On 20/06/2015 7:35 AM, Chris Plummer wrote:
> Please review the following fix for 8087153:
>
> http://spiro.us.oracle.com/~cplummer/webrevs/8087153/webrev.00/webrev.hotspot/
>
> https://bugs.openjdk.java.net/browse/JDK-8087153
>
> This bug was introduced by the changes for 8054386, which mapped the
> archive RW even if RO was requested. The state of the
> space_info->read_only was not reflecting this, causing an unnecessary
> attempt to remap to RW later on when a method's bytecodes were
> rewritten. This remap exposed a race condition on win32.
>
> Since the changes are small, they will be committed once they are approved.
>
> thanks,
>
> Chris