RFR: 8334239: Introduce macro for ubsan method/function exclusions [v3]

[Thomas Stuefe]

On Wed, 19 Jun 2024 07:31:28 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> A number of functions/methods have to be excluded from ubsan detection (e.g. because they do things that ubsan warns about, however it is still valid what is done there).
>> We can simplify this by introducing a macro (similar to asan-related ATTRIBUTE_NO_ASAN, see sanitizers/address.hpp).
>> Currently something like this is used :
>> 
>> #if defined(__clang__) || defined(__GNUC__)
>> __attribute__((no_sanitize("undefined")))
>> #endif
>
> Matthias Baesken has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - change comment
>  - ubsan.hpp -> ub.hpp

good, if you take @stefank's suggestions

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Marked as reviewed by stuefe (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/19722#pullrequestreview-2127377298