RFR(XS): 8193308: Disallow installing user signal handlers for SIGBUS on OSX

[Robin Westberg]

Hi David,

Thanks for the review!

> On 7 Feb 2018, at 01:57, David Holmes <david.holmes at oracle.com> wrote:
> 
> Looks good Robin! Thanks for getting to the bottom of this one!
> 
> Please update copyright years before pushing commiting.

Updated.

> Do you need a sponsor?

Ah, yes I do, if you have time it would be appreciated! Here’s an updated webrev with a proper mercurial changeset in case that makes it more convenient: http://cr.openjdk.java.net/~rwestberg/8193308/webrev.01/ <http://cr.openjdk.java.net/~rwestberg/8193308/webrev.01/>

Best regards,
Robin

> 
> Thanks,
> David
> 
> On 7/02/2018 1:19 AM, Robin Westberg wrote:
>> Hi all,
>> Please review the following change to disallow installing user signal handlers for SIGBUS on OSX. On OSX, SIGBUS is used internally by the VM (where most other platforms only use SIGSEGV), and installing a user handler can lead to a deadlock.
>> Issue: https://bugs.openjdk.java.net/browse/JDK-8193308 <https://bugs.openjdk.java.net/browse/JDK-8193308>
>> Webrev: http://cr.openjdk.java.net/~rwestberg/8193308/webrev.00/ <http://cr.openjdk.java.net/~rwestberg/8193308/webrev.00/>
>> Testing: hs-tier1, hs-tier2
>> Best regards,
>> Robin