[jdk11u-dev] RFR: 8364660: ClassVerifier::ends_in_athrow() should be removed

[Paul Hohensee]

On Sat, 13 Dec 2025 13:55:02 GMT, Andrew John Hughes <andrew at openjdk.org> wrote:

> This backport removes the `ends_in_athrow` check which has been obsoleted by [JDK-8302497](https://bugs.openjdk.org/browse/JDK-83024970), specifically:
> 
> "There is no way to perform a return instruction given that type state, so the handler would have to throw another exception (or loop forever). In fact, it's not even possible to express a handler with that type state, because there is no way for a stack frame, as expressed by the StackMapTable attribute ([4.7.4](https://docs.oracle.com/javase/specs/jvms/se22/html/jvms-4.html#jvms-4.7.4)), to carry flagThisUninit without any accompanying use of type uninitializedThis."  [0]
> 
> The backport is mostly clean, with the following exceptions:
> 
> 1. The removed code in `verifier.cpp` used `log_info` and the `Info` type rather than `log_debug` and `Debug`. (no [JDK-8234656](https://bugs.openjdk.org/browse/JDk-8234656))
> 2. The copyright header of `verifier.hpp` was older in 11u.
> 
> [0] https://cr.openjdk.org/~dlsmith/8302497/8302497-20231218/specs/invokespecial-verification-jvms.html

Marked as reviewed by phh (Reviewer).

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PR Review: https://git.openjdk.org/jdk11u-dev/pull/3134#pullrequestreview-3580330275