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/math/BigDecimal/ValueOfDouble.java

@@ -0,0 +1,74 @@
+/*
+ * 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.
+ */
+
+/*
+ * @test
+ * @bug 8356709
+ * @summary Test Double.toString(double)
+ * @run junit ValueOfDouble
+ */
+
+
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+
+public class ValueOfDouble {
+    private static final String DIGITS = "1234567000003456789"; // Enough digits to fill a long
+
+    @Test
+    public void testValueOfDouble() {
+        checkValue(0.0);
+        checkValue(-0.0);
+        checkValue(Math.PI);
+        checkValue(-Math.PI);
+        checkValue(Double.MAX_VALUE);
+        checkValue(Double.MIN_VALUE);
+        checkValue(1e-44); // Lots of digits with lots of 9s
+
+        for (int prec = 1; prec < DIGITS.length(); prec++) {
+            String prefix = DIGITS.substring(0, prec);
+            for (int exp = -30; exp < 30; exp++) {
+                double value = Double.parseDouble(prefix + "e" + exp);
+                checkValue(value);
+                checkValue(-value);
+            }
+        }
+    }
+
+    private static void checkValue(double value) {
+        BigDecimal expected = new BigDecimal(Double.toString(value));
+        assertEquals(expected, BigDecimal.valueOf(value));
+    }
+
+    @Test
+    public void testExceptions() {
+        assertThrows(NumberFormatException.class, () -> BigDecimal.valueOf(Double.NaN));
+        assertThrows(NumberFormatException.class, () -> BigDecimal.valueOf(Double.POSITIVE_INFINITY));
+        assertThrows(NumberFormatException.class, () -> BigDecimal.valueOf(Double.NEGATIVE_INFINITY));
+    }
+}