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/lang/CharSequence/GetChars.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2025, 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.
+ */
+
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+/**
+ * @test
+ * @bug 8343110
+ * @summary Check for expected behavior of default implementation of
+ *          CharSequence.getChars().
+ * @run testng GetChars
+ */
+public class GetChars {
+    private static CharSequence CS = new CharSequence() {
+        @Override
+        public int length() {
+            return 4;
+        }
+
+        @Override
+        public char charAt(int index) {
+            return "Test".charAt(index);
+        }
+
+        @Override
+        public CharSequence subSequence(int start, int end) {
+            throw new UnsupportedOperationException();
+        }
+    };
+
+    @Test
+    public void testExactCopy() {
+        var dst = new char[4];
+        CS.getChars(0, 4, dst, 0);
+        Assert.assertEquals(dst, new char[] {'T', 'e', 's', 't'});
+    }
+
+    @Test
+    public void testPartialCopy() {
+        var dst = new char[2];
+        CS.getChars(1, 3, dst, 0);
+        Assert.assertEquals(dst, new char[] {'e', 's'});
+    }
+
+    @Test
+    public void testPositionedCopy() {
+        var dst = new char[] {1, 2, 3, 4, 5, 6};
+        CS.getChars(0, 4, dst, 1);
+        Assert.assertEquals(dst, new char[] {1, 'T', 'e', 's', 't', 6});
+    }
+
+    @Test
+    public void testSrcBeginIsNegative() {
+        Assert.assertThrows(IndexOutOfBoundsException.class,
+                () -> CS.getChars(-1, 3, new char[4], 0));
+    }
+
+    @Test
+    public void testDstBeginIsNegative() {
+        Assert.assertThrows(IndexOutOfBoundsException.class,
+                () -> CS.getChars(0, 4, new char[4], -1));
+    }
+
+    @Test
+    public void testSrcBeginIsGreaterThanSrcEnd() {
+        Assert.assertThrows(IndexOutOfBoundsException.class,
+                () -> CS.getChars(4, 0, new char[4], 0));
+    }
+
+    @Test
+    public void testSrcEndIsGreaterThanSequenceLength() {
+        Assert.assertThrows(IndexOutOfBoundsException.class,
+                () -> CS.getChars(0, 5, new char[4], 0));
+    }
+
+    @Test
+    public void testRequestedLengthIsGreaterThanDstLength() {
+        Assert.assertThrows(IndexOutOfBoundsException.class,
+                () -> CS.getChars(0, 4, new char[3], 0));
+    }
+
+    @Test
+    public void testDstIsNull() {
+        Assert.assertThrows(NullPointerException.class,
+                () -> CS.getChars(0, 4, null, 0));
+    }
+
+}