RFR: 8336468: Reflection and MethodHandles should use more precise initializer checks [v5]
Aleksey Shipilev
shade at openjdk.org
Thu Sep 26 15:16:41 UTC 2024
On Wed, 25 Sep 2024 15:53:19 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:
>> This PR should cover the Reflection/MethodHandles part of [JDK-8336103](https://bugs.openjdk.org/browse/JDK-8336103).
>>
>> There are places where we change the behavior: `clinit` would now be recorded as "method", instead of "constructor". Tracing back the uses of `get_flags`: it is used for initializing `java.lang.ClassFrameInfo.flags`. There seem to be no readers for this field in VM. Java side for `j.l.CFI` does not seem to check any method/constructor flags. So I would say this change in behavior is not really visible, and there is no need to try and keep the old (odd) behavior.
>>
>> I also inlined the `select_method` definition, which allows for a bit more straight-forward local code, and obviates the need for wrapping things with `methodHandle`.
>>
>> @mlchung, you probably want to look at this more closely.
>>
>> Additional testing:
>> - [x] Linux x86_64 server fastdebug, `tier1`
>> - [x] Linux x86_64 server fastdebug, `all`
>
> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
>
> Replace assert with a comment
Thanks, OK then, I'll integrate.
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PR Comment: https://git.openjdk.org/jdk/pull/20192#issuecomment-2377255574
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