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/TimSort/ArrayBuilder.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright 2009 Google 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.util.Random;
+import java.math.BigInteger;
+
+public enum ArrayBuilder {
+
+    // These seven are from  Tim's paper (listsort.txt)
+
+    RANDOM_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            for (int i = 0; i < len; i++)
+                result[i] = rnd.nextInt();
+            return result;
+        }
+    },
+
+    DESCENDING_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            for (int i = 0; i < len; i++)
+                result[i] = len - i;
+            return result;
+        }
+    },
+
+    ASCENDING_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            for (int i = 0; i < len; i++)
+                result[i] = i;
+            return result;
+        }
+    },
+
+    ASCENDING_3_RND_EXCH_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            for (int i = 0; i < len; i++)
+                result[i] = i;
+            for (int i = 0; i < 3; i++)
+                swap(result, rnd.nextInt(result.length),
+                             rnd.nextInt(result.length));
+            return result;
+        }
+    },
+
+    ASCENDING_10_RND_AT_END_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            int endStart = len - 10;
+            for (int i = 0; i < endStart; i++)
+                result[i] = i;
+            for (int i = endStart; i < len; i++)
+                result[i] = rnd.nextInt(endStart + 10);
+            return result;
+        }
+    },
+
+    ALL_EQUAL_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            for (int i = 0; i < len; i++)
+                result[i] = 666;
+            return result;
+        }
+    },
+
+    DUPS_GALORE_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            for (int i = 0; i < len; i++)
+                result[i] = rnd.nextInt(4);
+            return result;
+        }
+    },
+
+    RANDOM_WITH_DUPS_INT {
+        public Object[] build(int len) {
+            Integer[] result = new Integer[len];
+            for (int i = 0; i < len; i++)
+                result[i] = rnd.nextInt(len);
+            return result;
+        }
+    },
+
+    PSEUDO_ASCENDING_STRING {
+        public String[] build(int len) {
+            String[] result = new String[len];
+            for (int i = 0; i < len; i++)
+                result[i] = Integer.toString(i);
+            return result;
+        }
+    },
+
+    RANDOM_BIGINT {
+        public BigInteger[] build(int len) {
+            BigInteger[] result = new BigInteger[len];
+            for (int i = 0; i < len; i++)
+                result[i] = HUGE.add(BigInteger.valueOf(rnd.nextInt(len)));
+            return result;
+        }
+    };
+
+    public abstract Object[] build(int len);
+
+    public void resetRandom() {
+        rnd = new Random(666);
+    }
+
+    private static Random rnd = new Random(666);
+
+    private static void swap(Object[] a, int i, int j) {
+        Object t = a[i];
+        a[i] = a[j];
+        a[j] = t;
+    }
+
+    private static BigInteger HUGE = BigInteger.ONE.shiftLeft(100);
+}