RFR: Fixing GCC 7.3.1 build issues

[Per Liden]

Thanks for reviewing!

/Per


On 2018-03-16 09:51, Stefan Karlsson wrote:
> Looks good.
>
> StefanK
>
> On 2018-03-15 15:05, Per Liden wrote:
>> We noticed that building the ZGC repo with a recent gcc (like 7.3.1) 
>> didn't work (it's more picky and generates additional warnings, etc). 
>> So here are patches to fix that.
>>
>> ZGC: Avoid treating oops as volatile in root barriers
>> http://cr.openjdk.java.net/~pliden/zgc/make_root_barriers_non_volatile/webrev.0 
>>
>>
>> ZGC: Avoid compiler warning about implicit dereference of volatile oop
>> http://cr.openjdk.java.net/~pliden/zgc/avoid_implicit_dereference_of_volatile_oop/webrev.0 
>>
>>
>> ZGC: Avoid oop cast issue in security manager
>> http://cr.openjdk.java.net/~pliden/zgc/avoid_oop_cast_issue_in_security_manager/webrev.0 
>>
>>
>> ZGC: TEMPORARY: Avoid compiler warnings about using the deprecated 
>> readdir_r
>> http://cr.openjdk.java.net/~pliden/zgc/temporary_fix_for_deprecated_readdir/webrev.0 
>>
>>
>> I'm also planning on bringing in Erik's fix of JDK-8199685 (Access 
>> arraycopy build failure with GCC 7.3.1), when that goes in upstream.
>>
>> /Per