Scan virtual thread stacks for code cache reclamation candidates #16403
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Code cache reclamation reclaims the memory of old method bodies when they are recompiled. The way it proves that an old method body is no longer used is by hooking the GC exit event and walking all active thread stacks looking for methods that are candidates for reclaimation. This approach does not consider virtual threads, and hence thread stacks for virtual threads that are not presently attached to a J9VMThread must also be scanned in this manner. Signed-off-by: Daryl Maier <[email protected]>
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Code cache reclamation reclaims the memory of old method bodies when they are recompiled. The way it proves that an old method body is no longer used is by hooking the GC exit event and walking all active thread stacks looking for methods that are candidates for reclaimation.
This approach does not consider virtual threads, and hence thread stacks for virtual threads that are not presently attached to a J9VMThread must also be scanned in this manner.
Fixes #15939
Signed-off-by: Daryl Maier [email protected]