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/ImmutableBitSet.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2023, 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
+ * @summary Basic tests of immutable BitSets
+ * @modules java.base/jdk.internal.util
+ * @run junit ImmutableBitSet
+ */
+
+import jdk.internal.util.ImmutableBitSetPredicate;
+import org.junit.jupiter.api.Test;
+
+import java.util.BitSet;
+import java.util.Random;
+import java.util.function.IntPredicate;
+import java.util.stream.IntStream;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ImmutableBitSet {
+
+    @Test
+    void empty() {
+        BitSet bs = new BitSet();
+        IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
+        test(bs, ibs);
+    }
+
+    @Test
+    void negativeIndex() {
+        IntStream.of(0, 127, 128, 129, 143, 4711).forEach(k -> {
+                    BitSet bs = new BitSet(k);
+                    IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
+                    assertFalse(ibs.test(-1));
+                    assertFalse(ibs.test(Integer.MIN_VALUE));
+                });
+    }
+
+    @Test
+    void basic() {
+        IntStream.of(0, 16, 127, 128, 129, 143, 4711).forEach(k -> basic(k));
+    }
+
+    void basic(int length) {
+        BitSet bs = createReference(length);
+        IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
+        test(bs, ibs);
+    }
+
+    @Test
+    void clearedAtTheTail() {
+        IntStream.of(0, 16, 127, 128, 129, 143, 4711).forEach(k -> {
+            for (int i = Long.BYTES - 1; i < Long.BYTES + 2; i++) {
+                BitSet bs = createReference(k + i);
+                for (int j = bs.length() - 1; j > Long.BYTES - 1; j--) {
+                    bs.clear(j);
+                }
+                IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
+                test(bs, ibs);
+            }
+        });
+    }
+
+    static void test(BitSet expected, IntPredicate actual) {
+        for (int i = 0; i < expected.length() + 17; i++) {
+            assertEquals(expected.get(i), actual.test(i), "at index " + i);
+        }
+    }
+
+    private static BitSet createReference(int length) {
+        BitSet result = new BitSet(length);
+        Random random = new Random(length);
+        for (int i = 0; i < length; i++) {
+            result.set(i, random.nextBoolean());
+        }
+        return result;
+    }
+
+}