RFR: 8199149: Improve the exception message thrown by VarHandle of unsupported operation [v4]
Mandy Chung
mchung at openjdk.org
Thu Jul 20 01:04:08 UTC 2023
> `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:
update copyright header
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/14928/files
- new: https://git.openjdk.org/jdk/pull/14928/files/9196ccb4..f82b2146
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=14928&range=03
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=14928&range=02-03
Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
Patch: https://git.openjdk.org/jdk/pull/14928.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/14928/head:pull/14928
PR: https://git.openjdk.org/jdk/pull/14928
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