8314545: [Lilliput] Revert changes in zRelocate.cpp

[rkennke]

We have a bunch of STS additions in zRelocate.cpp . The guidance that I've got from @fisk is that those are not needed and may in-fact cause deadlocks. Let's remove those changes and figure out if anything else is needed to deal with ZGC sync with ObjectMonitor deflation.

Testing:

• hotspot_gc +UCOH
• tier1 +UCOH

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Issue

• JDK-8314545: [Lilliput] Revert changes in zRelocate.cpp (Bug - P4)

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$ git fetch https://git.openjdk.org/lilliput.git pull/105/head:pull/105
$ git checkout pull/105

Update a local copy of the PR:
$ git checkout pull/105
$ git pull https://git.openjdk.org/lilliput.git pull/105/head

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$ git pr checkout 105

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• 00: Full (185c05fe)

[rkennke]

Awww, this results in the following crash. This is exactly the symptom of missing sync between ZGC worker and monitor deflation. Moving this PR back to draft until we figured something out.

A fatal error has been detected by the Java Runtime Environment:

Internal Error (/home/rkennke/src/openjdk/lilliput/src/hotspot/share/oops/markWord.inline.hpp:39), pid=19182, tid=19184

assert(!CompressedKlassPointers::is_null(narrow_klass())) failed: narrow klass must not be null: 0x0000000000000001

JRE version: OpenJDK Runtime Environment (22.0) (fastdebug build 22-internal-adhoc.rkennke.lilliput)

Java VM: OpenJDK 64-Bit Server VM (fastdebug 22-internal-adhoc.rkennke.lilliput, mixed mode, tiered, compressed class ptrs, z gc, linux-amd64)

Problematic frame:

V [libjvm.so+0x2f6d4f] markWord::klass() const [clone .part.36]+0x21

No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

An error report file with more information is saved as:

/local/home/rkennke/src/openjdk/lilliput/build/linux-x86_64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_hotspot_gc/scratch/15/hs_err_pid19182.log

If you would like to submit a bug report, please visit:

https://bugreport.java.com/bugreport/crash.jsp