RFR: JDK-8298448: UndefinedBehaviorSanitizer [v6]

[Justin King]

On Mon, 12 Dec 2022 09:50:33 GMT, Justin King <jcking at openjdk.org> wrote:

>> Allow building OpenJDK with UBSan. Currently the build fails when optimizing the image due to lots of undefined behavior (it invokes the built JVM). Follow up PRs will either replace the undefined behavior with well defined behavior or suppress errors which are intentional. The goal is to make OpenJDK more well defined and thus more portable across compilers and architectures.
>
> Justin King has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Put __ubsan_default_options in C++
>   
>   Signed-off-by: Justin King <jcking at google.com>

Moving back to draft while I figure out some autoconf magic.

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PR: https://git.openjdk.org/jdk/pull/11604