trouble with java -Xpatch

Alan Bateman Alan.Bateman at oracle.com
Fri Apr 8 12:58:59 UTC 2016


On 04/04/2016 12:47, Michael Rasmussen wrote:
>
> But retransform in this phase would still be subject to the same 
> limitations about no structural changes I assume? Meaning no adding of 
> members etc.
>
> My preferred solution would still be if adding (and changing) Xpatch 
> would be possible during OnLoad, as that should solve all my problems.
>
I think it would be better if we could post CFLH events in the 
primordial phase but this is only possible if agents opt-in via a new 
capability, maybe can_generate_early_class_hook_events that would have 
to be added along with can_generate_all_class_hook_events. This would 
nicely complement can_generate_early_vmstart so that suitably prepared 
agents would get CLFH, CompiledMethodLoad and other events during VM 
startup.

-Alan


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