8259636: Check for buffer backed by shared segment kicks in in unexpe…

…cted places

Reviewed-by: sundar, alanb, chegar

src/java.base/share/classes/java/nio/Direct-X-Buffer.java.template

@@ -203,7 +203,7 @@ class Direct$Type$Buffer$RW$$BO$
     {
 #if[rw]
         super(mark, pos, lim, cap, segment);
-        address = db.address() + off;
+        address = ((Buffer)db).address + off;
 #if[byte]
         cleaner = null;
 #end[byte]

test/jdk/java/foreign/TestByteBuffer.java

@@ -64,7 +64,6 @@
 import java.nio.file.StandardOpenOption;
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.function.BiConsumer;
@@ -668,6 +667,15 @@ public void buffersAndArraysFromSlices(Supplier<MemorySegment> segmentSupplier)
         }
     }
 
+    @Test(dataProvider="segments")
+    public void viewsFromSharedSegment(Supplier<MemorySegment> segmentSupplier) {
+        try (MemorySegment segment = segmentSupplier.get().share()) {
+            var byteBuffer = segment.asByteBuffer();
+            byteBuffer.asReadOnlyBuffer();
+            byteBuffer.slice(0, 8);
+        }
+    }
+
     @DataProvider(name = "segments")
     public static Object[][] segments() throws Throwable {
         return new Object[][] {