undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.

test/jdk/java/util/BitSet/MemoryLeak.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 1997, 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.
+ */
+
+/*
+ * @test
+ * @bug 4091185
+ * @summary Repeatedly OR BitSets; No OutOfMemoryException should result
+ */
+
+import java.util.*;
+
+/**
+ * This is a simple test class that repeatedly ORs two
+ * BitSets of unequal size together. Previously this
+ * caused an exponential growth in the memory underlying
+ * the BitSets quickly using all available memory
+ */
+public class MemoryLeak {
+
+   public static void main(String[] args) {
+
+        //create 2 test bitsets
+        BitSet setOne = new BitSet();
+        BitSet setTwo = new BitSet();
+
+        setOne.set(64);
+        setTwo.set(129);
+
+        //test for bug #4091185
+        //exponential set growth causing memory depletion
+        for (int i = 0; i < 50; i++) {
+            setOne.or(setTwo);
+            setTwo.or(setOne);
+        }
+    }
+}