RFR (M) #2 CR 8003985: Support @Contended annotation

[Aleksey Shipilev]

Frankly, I don't see the upsides, you can get the same level of
diagnostics at Java level; on any VM, any time you want. Is the a use
case which does not fit the bill of, say, java-field-layout [1]?

-Aleksey.

[1] https://github.com/shipilev/java-field-layout

On 12/05/2012 02:10 AM, Vitaly Davidovich wrote:
> PrintFieldLayout is still notproduct :) - did someone object to making
> it diagnostic/product?
> 
> Thanks
> 
> Sent from my phone
> 
> On Dec 4, 2012 4:27 PM, "Aleksey Shipilev" <aleksey.shipilev at oracle.com
> <mailto:aleksey.shipilev at oracle.com>> wrote:
> 
>     Hi,
> 
>     This is the revamp of JEP-142 aka @Contended, taking into the account
>     the feedbacks of Christian, Coleen and others:
>       http://shipilev.net/pub/jdk/hotspot/contended/webrev-5/
> 
>     The bottom line for most of the changes is dealing with footprint. I
>     think I've managed to squeeze into the same footprint by reusing
>     InstanceKlass::misc_flags to store class-level flag, and tagged field in
>     FieldInfo (as the side effect, cleaning up the mess with "temporarily
>     store type into offset field") to store per-field info.
> 
>     Testing:
>       - built and tested on Linux x86_64
>       - Test8003985 is passing on Linux x86_64
> 
>     Please take a look while I'm getting this through acceptance checks on
>     other platforms.
> 
>     -Aleksey
>