diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/SignatureInfo.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/SignatureInfo.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2001, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package sun.jvm.hotspot.runtime;
+
+import sun.jvm.hotspot.oops.*;
+
+public abstract class SignatureInfo extends SignatureIterator {
+  protected boolean hasIterated; // need this because iterate cannot be called in constructor (set is virtual!)
+  protected int     size;
+  protected int     type;        // BasicType
+
+  protected void lazyIterate() {
+    if (!hasIterated) {
+      iterate();
+      hasIterated = true;
+    }
+  }
+
+  protected abstract void set(int size, int /*BasicType*/ type);
+
+  public void doBool()                     { set(BasicTypeSize.getTBooleanSize(), BasicType.getTBoolean()); }
+  public void doChar()                     { set(BasicTypeSize.getTCharSize(),    BasicType.getTChar());    }
+  public void doFloat()                    { set(BasicTypeSize.getTFloatSize(),   BasicType.getTFloat());   }
+  public void doDouble()                   { set(BasicTypeSize.getTDoubleSize(),  BasicType.getTDouble());  }
+  public void doByte()                     { set(BasicTypeSize.getTByteSize(),    BasicType.getTByte());    }
+  public void doShort()                    { set(BasicTypeSize.getTShortSize(),   BasicType.getTShort());   }
+  public void doInt()                      { set(BasicTypeSize.getTIntSize(),     BasicType.getTInt());     }
+  public void doLong()                     { set(BasicTypeSize.getTLongSize(),    BasicType.getTLong());    }
+  public void doVoid()                     { set(BasicTypeSize.getTVoidSize(),    BasicType.getTVoid());    }
+  public void doObject(int begin, int end) { set(BasicTypeSize.getTObjectSize(),  BasicType.getTObject());  }
+  public void doArray(int begin, int end)  { set(BasicTypeSize.getTArraySize(),   BasicType.getTArray());   }
+
+  public SignatureInfo(Symbol signature) {
+    super(signature);
+
+    type = BasicType.getTIllegal();
+  }
+
+  public int size() { lazyIterate(); return size; }
+  public int type() { lazyIterate(); return type; }
+}