When trying to synchronize on an inline type, we should throw an IllegalMonitorStateException. However, this only work with heavy monitors (-XX:LockingMode=0) or legacy stack locking (-XX:LockingMode=1). We fail to throw the exception with lightweight locking (-XX:LockingMode=2) due to not masking the inline type bit in the new lightweight locking code. This should be fixed and already fails before merging jdk-22+16 which just changed the default from legacy stack locking to lightweight locking with JDK-8315880 (was backed out again later with JDK-8319253 in jdk-22+24 but is not merged in, yet).

---------------
Original report:

Test affected:

* compiler/valhalla/inlinetypes/TestIntrinsics.java
* compiler/valhalla/inlinetypes/TestLWorld.java

Example Output

Scenario #5
===========
Scenario flags: [-XX:+EnableValhalla, -XX:+EnablePrimitiveClasses, --add-exports, java.base/jdk.internal.value=ALL-UNNAMED, -XX:+IgnoreUnrecognizedVMOptions, -XX:-UseACmpProfile, -XX:+AlwaysIncrementalInline, -XX:FlatArrayElementMaxOops=5, -XX:FlatArrayElementMaxSize=-1, -XX:-UseArrayLoadStoreProfile, -XX:InlineFieldMaxFlatSize=-1, -XX:-InlineTypePassFieldsAsArgs, -XX:-InlineTypeReturnedAsFields, --add-exports, java.base/jdk.internal.misc=ALL-UNNAMED, --add-exports, java.base/jdk.internal.value=ALL-UNNAMED, -XX:-DeoptimizeALot]

TestFramework test VM exited with code 1

....

Error Output
------------
Exception in thread "main" compiler.lib.ir_framework.shared.TestRunException:

Test Failures (1)
-----------------
Custom Run Test: @Run: test59_verifier - @Test: test59:
compiler.lib.ir_framework.shared.TestRunException: There was an error while invoking @Run method public void compiler.valhalla.inlinetypes.TestIntrinsics.test59_verifier() throws java.lang.Exception
at compiler.lib.ir_framework.test.CustomRunTest.invokeTest(CustomRunTest.java:162)
at compiler.lib.ir_framework.test.AbstractTest.run(AbstractTest.java:99)
at compiler.lib.ir_framework.test.CustomRunTest.run(CustomRunTest.java:89)
at compiler.lib.ir_framework.test.TestVM.runTests(TestVM.java:826)
at compiler.lib.ir_framework.test.TestVM.start(TestVM.java:250)
at compiler.lib.ir_framework.test.TestVM.main(TestVM.java:165)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
at java.base/java.lang.reflect.Method.invoke(Method.java:582)
at compiler.lib.ir_framework.test.CustomRunTest.invokeTest(CustomRunTest.java:159)
... 5 more
Caused by: java.lang.RuntimeException: test59 failed: synchronization on inline type should not succeed
at compiler.valhalla.inlinetypes.TestIntrinsics.test59_verifier(TestIntrinsics.java:1181)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
... 7 more



at compiler.lib.ir_framework.test.TestVM.runTests(TestVM.java:861)
at compiler.lib.ir_framework.test.TestVM.start(TestVM.java:250)
at compiler.lib.ir_framework.test.TestVM.main(TestVM.java:165)




  #############################################################
   - To only run the failed tests use -DTest, -DExclude,
     and/or -DScenarios.
   - To also get the standard output of the test VM run with
     -DReportStdout=true or for even more fine-grained logging
     use -DVerbose=true.
  #############################################################


compiler.lib.ir_framework.shared.TestRunException: The following scenarios have failed: #0, #1, #2, #3, #4, #5. Please check stderr for more information.
at compiler.lib.ir_framework.TestFramework.reportScenarioFailures(TestFramework.java:676)
at compiler.lib.ir_framework.TestFramework.startWithScenarios(TestFramework.java:636)
at compiler.lib.ir_framework.TestFramework.start(TestFramework.java:348)
at compiler.valhalla.inlinetypes.TestIntrinsics.main(TestIntrinsics.java:71)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:582)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1570)