ValueTypes: java.lang.IdentityException MonitorEnterTest.java

[a7ehuo]

Failed Tests:

TEST: runtime/valhalla/inlinetypes/MonitorEnterTest.java#id0

TEST: runtime/valhalla/inlinetypes/MonitorEnterTest.java#id1

TEST: runtime/valhalla/inlinetypes/MonitorEnterTest.java#id2

STDERR:
java.lang.IdentityException: bad object type runtime/valhalla/inlinetypes/MonitorEnterTest$MyValue: object that is synchronized is a value type
        at runtime.valhalla.inlinetypes.MonitorEnterTest.monitorEnter(MonitorEnterTest.java:56)
        at runtime.valhalla.inlinetypes.MonitorEnterTest.main(MonitorEnterTest.java:75)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:571)
        at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
        at java.base/java.lang.Thread.run(Thread.java:1458)

JavaTest Message: Test threw exception: java.lang.IdentityException: bad object type runtime/valhalla/inlinetypes/MonitorEnterTest$MyValue: object that is synchronized is a value type
JavaTest Message: shutting down test

This is likely a JIT issue since it doesn't happen with -Xint.

JVM version

openjdk version "25-internal" 2025-09-16
OpenJDK Runtime Environment (build 25-internal-adhoc.root.openj9-openjdk-jdk.valuetypes)
Eclipse OpenJ9 VM (build master-eb9322941f4-eb9322941, JRE 25 Linux amd64-64-Bit Compressed References 20250117_000000 (JIT enabled, AOT enabled)
OpenJ9   - eb9322941
OMR      - 2767da3a2
JCL      - c154841cc67 based on jdk-25+5)

[a7ehuo]

@hzongaro @hangshao0 @theresa-m fyi

This is likely a JIT issue since it doesn't happen with -Xint.

[hzongaro]

I had prototyped a JIT change for this last year when we learned monitorenter could throw an IdentityException, but I never delivered it. I'll dust that off.