RFR (S) 8031818: Experimental VM flag for enforcing safe object construction

[Aleksey Shipilev]

Hi Vladimir,

On 01/22/2014 11:07 PM, Vladimir Kozlov wrote:
> Question first: can you wait about 2 weeks when we merge ppc64 changes?

I think we can wait. I don't want to collide with PPC merge either. In
fact, it would be even more convenient for us to grab PPC C2 in the
experiments from the mainline.

> I was not clear. The enum is not important. What I want is instead of
> unreadable code like next:
> 
>    if (wrote_final() ||
>        (AlwaysSafeConstructors && wrote_fields() &&
>         method()->name() == ciSymbol::object_initializer_name())
>        PPC64_ONLY(|| (wrote_volatile() && method()->is_initializer()))) {

Ugh. Yes, together with PPC changes the predicate is overblown. Makes
total sense to extract the method, will do that in updated webrev once
PPC change lands.

Thanks,
-Aleksey.