--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/memory/PlaceholderTable.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.memory;
+
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.utilities.*;
+
+public class PlaceholderTable extends TwoOopHashtable {
+  public PlaceholderTable(Address addr) {
+    super(addr);
+  }
+
+  // this is overriden here so that Hashtable.bucket will return
+  // object of PlacholderEntry.class
+  protected Class getHashtableEntryClass() {
+    return PlaceholderEntry.class;
+  }
+
+  /** All array classes of primitive type, and their class loaders */
+  public void primArrayClassesDo(SystemDictionary.ClassAndLoaderVisitor v) {
+    ObjectHeap heap = VM.getVM().getObjectHeap();
+    int tblSize = tableSize();
+    for (int index = 0; index < tblSize; index++) {
+      for (PlaceholderEntry probe = (PlaceholderEntry) bucket(index); probe != null;
+                                          probe = (PlaceholderEntry) probe.next()) {
+        Symbol sym = probe.klass();
+        // array of primitive arrays are stored in system dictionary as placeholders
+        FieldType ft = new FieldType(sym);
+        if (ft.isArray()) {
+          FieldType.ArrayInfo info = ft.getArrayInfo();
+          if (info.elementBasicType() != BasicType.getTObject()) {
+            Klass arrayKlass = heap.typeArrayKlassObj(info.elementBasicType());
+            arrayKlass = arrayKlass.arrayKlassOrNull(info.dimension());
+            v.visit(arrayKlass, probe.loader());
+          }
+        }
+      }
+    }
+  }
+}