RFR (XS) 8199511: Do not generate g1_{pre|post}_barrier_slow_id without CardTable-enabled barrier set

[Vladimir Kozlov]

Looks good to me but someone from GC should look on it too.

Thanks,
Vladimir

On 3/13/18 4:05 AM, Aleksey Shipilev wrote:
> g1_{pre|post}_barrier_slow_id generation reaches for card table address, but it might not be
> available if barrier set does not support it. Reliably asserts with Epsilon.
> 
> Bug:
>    https://bugs.openjdk.java.net/browse/JDK-8199511
> 
> Fix:
>    http://cr.openjdk.java.net/~shade/8199511/webrev.01/
> 
> This is arch-specific fix:
>    - c1_Runtime1_aarch64: copy-pasted the check block from g1_pre_barrier_slow_id
>    - c1_Runtime1_arm:     added check block for *both* g1_{pre|post}_slow_id
>    - c1_Runtime1_ppc:     already implemented
>    - c1_Runtime1_s390:    already implemented
>    - c1_Runtime1_sparc:   already implemented
>    - c1_Runtime1_x86:     copy-pasted the check block from g1_pre_barrier_slow_id
> 
> Testing: x86_64 build, Epsilon tests, (running with submit-hs repo now)
> 
> Thanks,
> -Aleksey
>