RFR: 8329332: Remove CompiledMethod and CodeBlobLayout classes [v2]

[Vladimir Kozlov]

On Wed, 3 Apr 2024 15:35:49 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Vladimir Kozlov has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Removed not_used state of nmethod
>
> src/hotspot/share/gc/x/xUnload.cpp line 78:
> 
>> 76: class XIsUnloadingBehaviour : public IsUnloadingBehaviour {
>> 77: public:
>> 78:   virtual bool has_dead_oop(nmethod* method) const {
> 
> This now takes an `nmethod` argument, but still calls as_nmethod(). I think that should be removed from this, and all similar functions here in the GC code. If you want, I can do that as a follow-up RFE.

I decided to fix it in these changes.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18554#discussion_r1550285238