diff --git a/gc/boehm/leaksoup/CallTree.java b/gc/boehm/leaksoup/CallTree.java
new file mode 100644
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+++ b/gc/boehm/leaksoup/CallTree.java
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+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Mozilla Communicator client code, released
+ * March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Patrick C. Beard <beard@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU Public License (the "GPL"), in which case the
+ * provisions of the GPL are applicable instead of those above.
+ * If you wish to allow use of your version of this file only
+ * under the terms of the GPL and not to allow others to use your
+ * version of this file under the NPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL.  If you do not delete
+ * the provisions above, a recipient may use your version of this
+ * file under either the NPL or the GPL.
+ */
+
+import java.util.Enumeration;
+import java.util.Vector;
+
+/**
+ * Represents a global tree of calls.
+ */
+public class CallTree {
+	public static class Node {
+	    int id;
+	    Node parent;
+	    String data;
+	    
+	    public Node(int id, Node parent) {
+	        this.id = id;
+	        this.parent = parent;
+	    }
+	};
+
+	private Vector nodes = new Vector(16000);
+	private StringTable strings;
+
+    public CallTree(StringTable strings) {
+        nodes.addElement(null);
+        this.strings = strings;
+    }
+	
+	/**
+	 * Parses a line of the form:
+	 * <c id=number pid=number>function[file,offset]</c>
+	 */
+	public Node parseNode(String line) {
+        try {
+            int start = 1 + line.indexOf('=');
+            int endTag = line.indexOf('>');
+            if (line.charAt(endTag - 1) == '/') {
+                // just references an already parsed node.
+                int id = Integer.parseInt(line.substring(start, endTag - 1));
+                return (Node) nodes.elementAt(id);
+            } else {
+                int end = line.indexOf(' ', start + 1);
+                int id = Integer.parseInt(line.substring(start, end));
+                start = 1 + line.indexOf('=', end + 1);
+                end = line.indexOf('>', start + 1);
+                int pid = Integer.parseInt(line.substring(start, end));
+                Node node = addNode(id, pid);
+                start = end + 1;
+                end = line.lastIndexOf('<');
+                node.data = strings.intern(line.substring(start, end));
+                return node;
+            }
+        } catch (NumberFormatException nfe) {
+        }
+        return null;
+	}
+	
+	public Node addNode(int id, int pid) {
+	    Node parent = (Node) nodes.elementAt(pid);
+	    Node node = new Node(id, parent);
+	    nodes.addElement(node);
+	    if (nodes.size() != (id + 1))
+	        throw new Error("inconsistent node id");
+	    return node;
+	}
+	
+	public Node getNode(int id) {
+	    return (Node) nodes.elementAt(id);
+	}
+}