On Mon, 12 Jul 2021 20:22:25 GMT, Anton Kozlov <akoz...@openjdk.org> wrote:

> The change adds W^X transition in RawMonitor family of functions, fixing the 
> crash. RawMonitor functions are treated specially, so W^X transition is not 
> inserted automatically. A better fix would be in .xml description for entries 
> generation, but for now it is too risky. I hope to get this fixed in 17 in 
> the simplest way and do re-work in the 18. This change is still 100% correct 
> for the reported bug.
> 
> Verified by: 
> 
> jtreg -vmoption:-XX:+AssertWXAtThreadSync 
> test/hotspot/jtreg/vmTestbase/nsk/jvmti/scenarios/bcinstr/BI04/bi04t002

I can understand that raw_enter and raw_wait need this fix because they have 
the ThreadBlockInVM transition; but why do we need it for raw_exit and 
raw_notify when they do not change the thread state ??

-------------

PR: https://git.openjdk.java.net/jdk17/pull/244

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