On Wed, 19 Jul 2023 02:19:58 GMT, Mandy Chung <mch...@openjdk.org> wrote:

>> `VarForm::getMemberName` currently throws UOE with no information if the 
>> requested access mode is unsupported.   To provide the var handle 
>> information, move the access mode check to `VarHandle` so that the exception 
>> message can include the var handle information.  Changes include:
>> 
>> 1. change `VarHandle::checkAccessModeThenIsDirect` to check if the access 
>> mode is unsupported.  This check is only needed for direct var handle.
>> 2. change `VarHandle::getMethodHandleUncached` to call `getMemberNameOrNull` 
>> and throw UOE with an informative exception message if the access mode is 
>> unsupported
>> 
>> The error message looks like:
>> 
>> java.lang.UnsupportedOperationException: compareAndSet is not supported for 
>> VarHandle[varType=java.lang.String, coord=[class Foo$Goo]]
>
> Mandy Chung has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   review feedback

Marked as reviewed by liach (Author).

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

PR Review: https://git.openjdk.org/jdk/pull/14928#pullrequestreview-1536143735

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