git: openjdk/jdk: 8251397: NPE on ClassValue.ClassValueMap.cacheArray

Thu Sep 17 13:42:56 UTC 2020

Changeset: 81e2cf82
Author:    Galder Zamarreño <galder at redhat.com>
Committer: Severin Gehwolf <sgehwolf at openjdk.org>
Date:      2020-09-17 13:42:15 +0000
URL:       https://git.openjdk.java.net/jdk/commit/81e2cf82

8251397: NPE on ClassValue.ClassValueMap.cacheArray

Add release fence to ClassValueMap constructor.

* Release fence guarantees that cacheArray field will published
with a non-null value.
* Without this fix, CacheValueMap.cacheArray can sometimes be
seen as null.

Reviewed-by: shade, psandoz

! src/java.base/share/classes/java/lang/ClassValue.java