Integrated: 8332913: GenShen: Restore shared update refs iterator

[William Kemper]

On Fri, 24 May 2024 17:55:24 GMT, William Kemper <wkemper at openjdk.org> wrote:

> Turns out, this iterator is shared between concurrent and degenerated GC cycles. It should not have been made into a local variable.

This pull request has now been integrated.

Changeset: 31bca307
Author:    William Kemper <wkemper at openjdk.org>
URL:       https://git.openjdk.org/shenandoah/commit/31bca3076634a3119a049283587dedd1c3de9f16
Stats:     21 lines in 4 files changed: 11 ins; 3 del; 7 mod

8332913: GenShen: Restore shared update refs iterator

Reviewed-by: ysr, kdnilsen

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PR: https://git.openjdk.org/shenandoah/pull/439