On Mon, 12 Dec 2022 10:42:22 GMT, Justin King <jck...@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:
> 
>   Simplify logic for including __ubsan_default_options
>   
>   Signed-off-by: Justin King <jck...@google.com>

I much also check: is this really needed for *all* executables we make? I would 
have guessed that it would suffice with the "launchers", i.e. like `java`, 
`javac`, `jar` etc. These are all compiled from a single source file, 
`src/java.base/share/native/launcher/main.c`, with different defines depending 
on what Java classes it should actually launch, and with different output names.

Doing things this way will also affect non-launcher executables, like 
`jabswitch`, `msiwrapper` and all executable test binaries. 

That might be correct, but I could not be certain of that from trying to read 
the backlog of discussion in this bug.

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

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

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