RFR: 8346781: [JVMCI] Limit ServiceLoader to class initializers

[Tom Rodriguez]

On Mon, 23 Dec 2024 17:58:23 GMT, Doug Simon <dnsimon at openjdk.org> wrote:

> In the context of libgraal, the current use of ServiceLoader in JVMCI is problematic as libgraal does all class loading at image build time. There are static fields such as `JVMCIServiceLocator.cachedLocators` that need to be initialized [via reflection](https://github.com/oracle/graal/blob/30492c3f7847a13ae7f8dc50663a5a039e49a8e7/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/hotspot/libgraal/BuildTime.java#L175-L180) when building libgraal.
> 
> This PR removes the need for such reflection by moving all use of ServiceLoader in JVMCI into `<clinit>` methods. These methods are executed when building libgraal. It also removes a few other public methods and fields that are no longer used by Graal. Given that JVMCI is still experimental and only has qualified exports to Graal, I don't think this needs a CSR.

Marked as reviewed by never (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22869#pullrequestreview-2521126478