[ruby-core:98199] [Ruby master Bug#16658] `method__cache__clear` DTrace hook was dropped without replacement

Issue #16658 has been updated by vo.x (Vit Ondruch).


> > When this hook was invoked?
> 
> https://github.com/ruby/ruby/pull/2888/files#diff-6cea7716df08f2b7fdc5fb30c7963884L98

Hm, this does not appear to really work, since the vm_method.c is collapsed. Anyway, this used to be the invocation place:

https://github.com/ruby/ruby/blob/f2286925f08406bc857f7b03ad6779a5d61443ae/vm_method.c#L98

----------------------------------------
Bug #16658: `method__cache__clear` DTrace hook was dropped without replacement
https://bugs.ruby-lang.org/issues/16658#change-85436

* Author: vo.x (Vit Ondruch)
* Status: Open
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* ruby -v: ruby 2.8.0dev (2020-02-26 master 83705c42ce) [x86_64-linux]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
The PR #2888 [1] dropped DTrace `method__cache__clear` hook without replacement. Was this intentional? If yes, then the probes.d [3] should be updated appropriately. If this was not intentional, the hook should be reintroduced.



[1]: https://github.com/ruby/ruby/pull/2888
[2]: https://github.com/ruby/ruby/commit/b9007b6c548f91#diff-6cea7716df08f2b7fdc5fb30c7963884L98
[3]: https://github.com/ruby/ruby/blob/master/probes.d#L227



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