RFR: 8218969: Free JVMCI native structures in nmethod::flush
nils.eliasson at oracle.com
Thu Feb 14 13:48:42 UTC 2019
On 2019-02-14 12:08, Erik Österlund wrote:
> An nmethod goes from being is_alive() to being !is_alive() and
> eventually being freed in nmethod::flush. Native structures for
> nmethods are freed in nmethod::flush when we free the nmethod. Except
> for a few things, including JVMCI handles, that are freed already when
> becoming !is_alive (and some logic to deal with this potentially
> happening twice for a given nmethod), and finally asserting during
> flush that it was already cleared.
> This enhancement proposes to treat these JVMCI handles like we treat
> any other native structure and simply free it in nmethod::flush, when
> we free the nmethod, so that the nmethod and handles have a 1:1
> mapping for their life cycles.
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