Integrated: 8293979: Resolve JVM_CONSTANT_Class references at CDS dump time

[Ioi Lam]

On Mon, 19 Sep 2022 04:33:55 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> Some `JVM_CONSTANT_Class` entries are guaranteed to resolve to the same value at both CDS dump time and run time:
> 
> - Classes that are resolved during `vmClasses::resolve_all()`. These classes cannot be replaced by JVMTI agents at run time.
> - Supertypes -- at run time, a class `C` can be loaded from the CDS archive only if all of `C`'s super types are also loaded from the CDS archive. Therefore, we know that a `JVM_CONSTANT_Class` reference to a supertype of `C` must resolved to the same value at both CDS dump time and run time.
> 
> By doing the resolution at dump time, we can speed up run time start-up by a little bit.
> 
> The `ClassPrelinker` class added by this PR will also be used in future REFs for pre-resolving other constant pool entries. The ultimate goal is to resolve `invokedynamic` and `invokehandle` so we can significantly improve the start-up time of features such as Lambda expressions and String concatenation. See [JDK-8293336](https://bugs.openjdk.org/browse/JDK-8293336)

This pull request has now been integrated.

Changeset: aad81f2e
Author:    Ioi Lam <iklam at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/aad81f2eba5a77a028a58a767fd4afc11b4dd528
Stats:     410 lines in 8 files changed: 357 ins; 39 del; 14 mod

8293979: Resolve JVM_CONSTANT_Class references at CDS dump time

Reviewed-by: coleenp, ccheung

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PR: https://git.openjdk.org/jdk/pull/10330