Integrated: 8314653: Metaspace: remove allocation guard feature

[Thomas Stuefe]

On Sat, 8 Jun 2024 06:42:37 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> In Metaspace in debug builds, one can guard allocations. This has been a useful feature in during implementation of JEP 387 to find bugs, but has not found much use thereafter, and remains an obscure and underused feature.
> 
> But these guards cause quite a bit of complexity, mainly since they make testing difficult: with guards on, predicting arena growth gets quite complex.
> 
> I propose to remove this feature to reduce Metaspace complexity.
> 
> Tests: local (mac m1, Linux x64) Metaspace tests. GHAs.

This pull request has now been integrated.

Changeset: b0efd774
Author:    Thomas Stuefe <stuefe at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/b0efd7740243916ba22178524ab2ede9e5436d94
Stats:     263 lines in 15 files changed: 0 ins; 242 del; 21 mod

8314653: Metaspace: remove allocation guard feature

Reviewed-by: azafari, dholmes

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PR: https://git.openjdk.org/jdk/pull/19611