[jdk21u-dev] RFR: 8337981: ShenandoahHeap::is_in should check for alive regions

Fri Mar 14 23:58:26 UTC 2025

Backporting JDK-8337981: ShenandoahHeap::is_in should check for alive regions. Fixes Shenandoah's implementation of the `CollectedHeap::is_in` function to not just check that oop is within the heap bounds, but to check that it is within the committed section of the heap. Ran GHA Sanity Checks, and local Tier 1, and Tier 2 tests. Patch is clean.

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Commit messages:
 - Backport b9d49dcef22ab81a087d890bbac0329a5244a2ef

Changes: https://git.openjdk.org/jdk21u-dev/pull/1496/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1496&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337981
  Stats: 118 lines in 12 files changed: 58 ins; 7 del; 53 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1496.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1496/head:pull/1496

PR: https://git.openjdk.org/jdk21u-dev/pull/1496