[lilliput-jdk17u:lilliput] RFR: 8310427: [Lilliput/JDK17] Protect from running broken JFR and JVMTI code with compact headers

[Roman Kennke]

On Tue, 20 Jun 2023 15:42:30 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> We have at least two things missing in 17u to make Lilliput safe: [JDK-8283710](https://bugs.openjdk.org/browse/JDK-8283710) and [JDK-8275415](https://bugs.openjdk.org/browse/JDK-8275415). Backporting those things is intrusive and could take a while. Meanwhile, we need to protect user code from entering those paths when compact headers are enabled.
> 
> Additional testing:
>  - [x] Linux x86_64 fastdebug, `jdk/jfr`, `UCOH` disabled by default; some pre-existing failures
>  - [x] Linux x86_64 fastdebug, `jdk/jfr`, `+UCOH`
>  - [x] Linux x86_64 fastdebug `serviceability/jvmti`, `UCOH` disabled by default
>  - [x] Linux x86_64 fastdebug `serviceability/jvmti`, `+UCOH`
>  - [x] Linux x86_64 fastdebug `vmTestbase/nsk/jvmti`, `UCOH` disabled by default
>  - [x] Linux x86_64 fastdebug `vmTestbase/nsk/jvmti`, `+UCOH`

May be better to use 8308296 and 8308411 as bug IDs?

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

PR Comment: https://git.openjdk.org/lilliput-jdk17u/pull/35#issuecomment-1600794464