RFR: 8369147: Various issues with new tests added by JDK-8316694 [v2]

[Vladimir Kozlov]

On Thu, 23 Oct 2025 17:33:21 GMT, Chad Rakoczy <duke at openjdk.org> wrote:

>> [JDK-8369147](https://bugs.openjdk.org/browse/JDK-8369147)
>> 
>> Fixes tests added in [JDK-8316694](https://bugs.openjdk.org/browse/JDK-8316694)
>> 
>> `DeoptimizeRelocatedNMethod.java` and `RelocateNMethod.java` failed because they attempted to relocate nmethods to the `MethodProfiled` code heap which does not exist when `TieredCompilation` is false. Updated the tests to use `MethodNonProfiled` heap which exists regardless of `TieredCompilation`
>> 
>> `StressNMethodRelocation.java` runs for 60 seconds and also compiles 1024 methods with C2. This was causing the test to timeout if the compilation took too much time. Increasing the timeout to 5 minutes should give C2 enough time to compile the functions
>> 
>> `NMethodRelocationTest.java` runs using SerialGC which caused a multiple GC error when trying to run with another GC. Added a requires to force SerialGC
>
> Chad Rakoczy has updated the pull request incrementally with four additional commits since the last revision:
> 
>  - Fix requires
>  - Reproblem list serviceability/jvmti/NMethodRelocation/NMethodRelocationTest.java
>  - Compile for 30 seconds instead of 1024 methods
>  - Fix requires

Unfortunately all sub-tests with `-XX:+UseShenandoahGC` failed because Oracle JDK does not include this GC: 

Error occurred during initialization of VM
Option -XX:+UseShenandoahGC not supported

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PR Comment: https://git.openjdk.org/jdk/pull/27659#issuecomment-3440046663