RFR: 8316711: SEGV in LoaderConstraintTable::find_loader_constraint after JDK-8310874

Fri Sep 22 16:58:43 UTC 2023

The new loader constraint code was putting the InstanceKlass on the deallocate list, then safepointing, then trying to find it in the LoaderConstraintTable.  In the crash, the InstanceKlass was deallocated before searching for it in the table.  The fix is to use the proper order.
Tested multiple runs with closed failing tests, and tier1-4 (1 test left)

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Commit messages:
 - 8316711: SEGV in LoaderConstraintTable::find_loader_constraint after JDK-8310874

Changes: https://git.openjdk.org/jdk/pull/15891/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15891&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316711
  Stats: 7 lines in 2 files changed: 3 ins; 4 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15891.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15891/head:pull/15891

PR: https://git.openjdk.org/jdk/pull/15891