The PR discussion in JDK-8342807 identified a need to review the comments in setSIGCHLDHandler and see if it is up to date with repect to currently supported Unix implementations.
https://github.com/openjdk/jdk/pull/21633#issuecomment-2603796226
https://github.com/openjdk/jdk/pull/21633#issuecomment-2603796226