Update JVM_VirtualThreadDisableSuspend

Enable JVM_VirtualThreadDisableSuspend in JDK22. A PR has been
opened to move it to JDK22 in the RI. Eventually, we will see this
method in JDK22.

The above method is invoked in the VirtualThread class. So, the
assertion in the stub will trigger and cause failures in the builds.

Leaving the stub empty should be fine. See eclipse-openj9#18671 for more details.

Related:
- eclipse-openj9#18671
- eclipse-openj9#18667
- eclipse-openj9#18663

Signed-off-by: Babneet Singh <sbabneet@ca.ibm.com>

runtime/j9vm/exports.cmake

@@ -441,11 +441,6 @@ endif()
 if(NOT JAVA_SPEC_VERSION LESS 22)
 	jvm_add_exports(jvm
 		JVM_ExpandStackFrameInfo
-	)
-endif()
-
-if(NOT JAVA_SPEC_VERSION LESS 23)
-	jvm_add_exports(jvm
 		JVM_VirtualThreadDisableSuspend
 	)
 endif()

runtime/j9vm/j9vmnatives.xml

@@ -450,10 +450,6 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-ex
 	<exports group="jdk22">
 		<!-- Additions for Java 22 (General) -->
 		<export name="JVM_ExpandStackFrameInfo"/>
-	</exports>
-
-	<exports group="jdk23">
-		<!-- Additions for Java 23 (General) -->
 		<export name="JVM_VirtualThreadDisableSuspend"/>
 	</exports>
 </exportlists>

runtime/j9vm/javanextvmi.cpp

@@ -724,14 +724,14 @@ JVM_ExpandStackFrameInfo(JNIEnv *env, jobject object)
 {
 	assert(!"JVM_ExpandStackFrameInfo unimplemented");
 }
-#endif /* JAVA_SPEC_VERSION >= 22 */
 
-#if JAVA_SPEC_VERSION >= 23
 JNIEXPORT void JNICALL
 JVM_VirtualThreadDisableSuspend(JNIEnv *env, jobject vthread, jboolean enter)
 {
-	assert(!"JVM_VirtualThreadDisableSuspend unimplemented");
+	/* TODO: Add implementation.
+	 * See https://github.com/eclipse-openj9/openj9/issues/18671 for more details.
+	 */
 }
-#endif /* JAVA_SPEC_VERSION >= 23 */
+#endif /* JAVA_SPEC_VERSION >= 22 */
 
 } /* extern "C" */

runtime/redirector/forwarders.m4

@@ -429,5 +429,5 @@ _IF([defined(J9VM_OPT_VALHALLA_VALUE_TYPES)],
 	[_X(JVM_IsValhallaEnabled, JNICALL, false, jboolean, void)])
 _IF([JAVA_SPEC_VERSION >= 22],
 	[_X(JVM_ExpandStackFrameInfo, JNICALL, false, void, JNIEnv *env, jobject object)])
-_IF([JAVA_SPEC_VERSION >= 23],
+_IF([JAVA_SPEC_VERSION >= 22],
 	[_X(JVM_VirtualThreadDisableSuspend, JNICALL, false, void, JNIEnv *env, jobject vthread, jboolean enter)])