RFR: 8374828: Save load_barrier_on_oop_field_preloaded in aot CodeCache

[Stefan Karlsson]

On Thu, 8 Jan 2026 23:18:19 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> Save this address so that the code that uses it in the valhalla repo will have it.  This doesn't fail in main jdk repository.
> See CR for more information.
> Tested with tier1-4.

And another ahh (See the `()` at the end of the line): 

  SET_ADDRESS(_extrs, ZBarrierSetRuntime::load_barrier_on_oop_field_preloaded_addr());
  SET_ADDRESS(_extrs, ZBarrierSetRuntime::load_barrier_on_phantom_oop_field_preloaded_addr());


The `SET_ADDRESS` is done with the value returned from calling the above functions.

The Shenandoah barrier functions are referred to directly:

  SET_ADDRESS(_extrs, ShenandoahRuntime::write_barrier_pre);
  SET_ADDRESS(_extrs, ShenandoahRuntime::load_reference_barrier_phantom);
  SET_ADDRESS(_extrs, ShenandoahRuntime::load_reference_barrier_phantom_narrow);


So, I think you need to make sure to look for reference to load_barrier_on_oop_field_preloaded and `load_barrier_on_phantom_oop_field_preloaded`.

I don't know if that helps or not.

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PR Comment: https://git.openjdk.org/jdk/pull/29129#issuecomment-3739144000