RFR: 8329757: Crash with fatal error: DEBUG MESSAGE: Fast Unlock lock on stack [v3]

[Axel Boldt-Christmas]

> `Deoptimization::relock_objects` may reorder locks within in the `LockStack` which are added inside the same vframe. This can be handled by the interpreter but if OSR has occurred C2 may observe this invalid order in the `LockStack`, which breaks its assumption leading to incorrect behaviour.
> 
> This patch functionally makes sure that the LockStack is always consistent by always inflating eliminated locks when `Deoptimization::relock_objects`  is called.
> 
> It also adds verification code which checks that the LockStack is consistent with the lock order observed inside the deoptimized vframes. 
> 
> Note: for leaf deoptimizations we have enough information to recreate a correct top of the LockStack with minimal inflations, however that should be a separate RFE. This only inflates eliminated locks so the worth of solving that may be minimal or even detrimental. 
> 
> Tests still running. Tier 1-5 done, Tier 6-7 running.

Axel Boldt-Christmas has updated the pull request incrementally with one additional commit since the last revision:

  Include sort order

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18715/files
  - new: https://git.openjdk.org/jdk/pull/18715/files/d2e8216d..12d112bc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18715&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18715&range=01-02

  Stats: 6 lines in 1 file changed: 3 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18715.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18715/head:pull/18715

PR: https://git.openjdk.org/jdk/pull/18715