Protect entryName from being collected by the GC

j9gc_createJavaLangString can release VM access, which allows the GC
to move or collect objects. To prevent this, entryName is pushed to
a special frame before the call to j9gc_createJavaLangString. This
ensures that entryName is protected from being moved or collected by
the GC.

Related: #20870

Signed-off-by: Babneet Singh <[email protected]>

Author: babsingh

runtime/vm/bindnatv.cpp

@@ -1110,7 +1110,9 @@ lookupJNINative(J9VMThread *currentThread, J9NativeLibrary *nativeLibrary, J9Met
 		if (NULL != entryName) {
 #if JAVA_SPEC_VERSION >= 24
 			J9ROMMethod *nativeROMMethod = J9_ROM_METHOD_FROM_RAM_METHOD(nativeMethod);
+			PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, entryName);
 			j9object_t javaName = mmFuncs->j9gc_createJavaLangStringWithUTFCache(currentThread, J9ROMMETHOD_NAME(nativeROMMethod));
+			entryName = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
 			if (NULL != javaName)
 #endif /* JAVA_SPEC_VERSION >= 24 */
 			{