RFR: 8305192: serial GC fails "assert(Universe::on_page_boundary(bottom) && Universe::on_page_boundary(end)) failed: invalid space boundaries"

Tue Apr 4 10:19:13 UTC 2023

Fix to ensure survivor-space is properly aligned.

(I tried to reproduce the failure on master but to no avail.)

Test: tier1-6

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Commit messages:
 - s1-eden-align

Changes: https://git.openjdk.org/jdk/pull/13323/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13323&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305192
  Stats: 6 lines in 1 file changed: 4 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13323.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13323/head:pull/13323

PR: https://git.openjdk.org/jdk/pull/13323