On Tue, 24 May 2022 14:40:56 GMT, Maurizio Cimadamore <mcimadam...@openjdk.org> 
wrote:

> Constructing indexed var handles using the `MemoryLayout` API produces 
> `VarHandle` which do not check the input indices for out-of-bounds conditions.
> While this can never result in a VM crash (after all the memory segment will 
> protect against "true" OOB access), it is still possible for an access 
> expression to refer to parts of a segment that are logically unrelated.
> 
> This patch adds a "logical" bound check to all indexed var handles generated 
> using the layout API.
> Benchmarks are not affected by the check. Users are still able to create 
> custom "unchecked" var handles, using the combinator API in `MethodHandles`.

This pull request has now been integrated.

Changeset: f58c9a65
Author:    Maurizio Cimadamore <mcimadam...@openjdk.org>
URL:       
https://git.openjdk.java.net/jdk/commit/f58c9a659ba181407ecdb2aacb81e6a7f1cbd9ff
Stats:     92 lines in 4 files changed: 70 ins; 5 del; 17 mod

8287244: Add bound check in indexed memory access var handle

Reviewed-by: psandoz, jvernee

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

PR: https://git.openjdk.java.net/jdk/pull/8868

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