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/reflect/AccessFlag/FieldAccessFlagTest.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2022, 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 8266670
+ * @summary Test expected AccessFlag's on fields.
+ */
+
+import java.lang.annotation.*;
+import java.lang.reflect.*;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.Set;
+
+import static java.lang.reflect.AccessFlag.*;
+
+/*
+ * Field modifiers include:
+ * public, private, protected, static, final, volatile, transient,
+ *
+ * Additionally, the access flags enum and synthetic cannot be
+ * explicitly applied.
+ */
+public class FieldAccessFlagTest {
+    public static void main(String... args) {
+        for (var field :
+                 FieldAccessFlagTest.class.getDeclaredFields()) {
+            checkField(field);
+        }
+
+        for (var field :
+                 MetaSynVar.class.getDeclaredFields()) {
+            checkField(field);
+        }
+    }
+
+    private static void checkField(Field field) {
+        ExpectedFieldFlags expected =
+            field.getAnnotation(ExpectedFieldFlags.class);
+        if (expected != null) {
+            Set<AccessFlag> base = EnumSet.noneOf(AccessFlag.class);
+            Collections.addAll(base, expected.value());
+            Set<AccessFlag> actual = field.accessFlags();
+            if (!base.equals(actual)) {
+                throw new RuntimeException("On " + field +
+                        " expected " + base +
+                        " got " + actual);
+            }
+        }
+    }
+
+    // Fields
+    @ExpectedFieldFlags({PUBLIC, STATIC, FINAL})
+    public static final String f1 = "foo";
+
+    @ExpectedFieldFlags({PRIVATE, VOLATILE, TRANSIENT})
+    private volatile transient String secret = "xxyzzy";
+
+    @ExpectedFieldFlags({PROTECTED})
+    protected String meadow = "";
+
+    // Enum constant should have the enum access flag set
+    static enum MetaSynVar {
+        @ExpectedFieldFlags({PUBLIC, STATIC, FINAL, ENUM})
+        FOO,
+
+        @ExpectedFieldFlags({PUBLIC, STATIC, FINAL, ENUM})
+        BAR;
+
+        @ExpectedFieldFlags({PRIVATE}) // no "ENUM"
+        private int field = 0;
+    }
+
+    @Retention(RetentionPolicy.RUNTIME)
+    private @interface ExpectedFieldFlags {
+        AccessFlag[] value();
+    }
+}