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/Class/IsEnum.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2003, 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 4891872 4989735 4990789 5020490
+ * @summary Check isEnum() method
+ */
+
+import java.lang.annotation.*;
+
+public class IsEnum {
+
+    static int test(Class<?> clazz, boolean expected) {
+        int status = (clazz.isEnum() == expected) ? 0 : 1;
+
+        if (status == 1) {
+            System.err.println("Unexpected enum status for " + clazz);
+        }
+        return status;
+    }
+
+    public static void main(String... argv) {
+        int failures = 0;
+
+        failures += test(IsEnum.class, false);
+        failures += test(String.class, false);
+        failures += test(Enum.class, false);
+        failures += test(EnumPoseur.class, false);
+        failures += test(java.math.RoundingMode.class, true);
+
+        // Classes in java.lang.annotation
+        failures += test(Annotation.class, false);
+        failures += test(ElementType.class, true);
+        failures += test(Retention.class, false);
+        failures += test(RetentionPolicy.class, true);
+        failures += test(Target.class, false);
+
+        // A class for a specialized enum constant isn't itself an enum
+        failures += test(SpecialEnum.class, true);
+        failures += test(SpecialEnum.RED.getClass(), false);
+        failures += test(SpecialEnum.GREEN.getClass(), true);
+
+        if (failures > 0) {
+            throw new RuntimeException("Unexpected enum status detected.");
+        }
+    }
+}
+
+enum SpecialEnum {
+    RED {
+        String special() {return "riding hood";}
+    },
+
+    GREEN;
+
+    String special() {return "how was my valley";}
+}