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/LazyConstant/LazyConstantTestUtil.java

@@ -0,0 +1,174 @@
+/*
+ * 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 java.lang.reflect.Field;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.IntFunction;
+import java.util.function.Supplier;
+
+final class LazyConstantTestUtil {
+
+    private LazyConstantTestUtil() { }
+
+    public static final String UNINITIALIZED_TAG = ".uninitialized";
+
+    public static final class CountingSupplier<T>
+            extends AbstractCounting<Supplier<T>>
+            implements Supplier<T> {
+
+        public CountingSupplier(Supplier<T> delegate) {
+            super(delegate);
+        }
+
+        @Override
+        public T get() {
+            incrementCounter();
+            return delegate.get();
+        }
+
+    }
+
+    public static final class CountingIntFunction<R>
+            extends AbstractCounting<IntFunction<R>>
+            implements IntFunction<R> {
+
+        public CountingIntFunction(IntFunction<R> delegate) {
+            super(delegate);
+        }
+
+        @Override
+        public R apply(int value) {
+            incrementCounter();
+            return delegate.apply(value);
+        }
+
+    }
+
+    public static final class CountingFunction<T, R>
+            extends AbstractCounting<Function<T, R>>
+            implements Function<T, R> {
+
+        public CountingFunction(Function<T, R> delegate) {
+            super(delegate);
+        }
+
+        @Override
+        public R apply(T t) {
+            incrementCounter();
+            return delegate.apply(t);
+        }
+
+    }
+
+    public static final class CountingBiFunction<T, U, R>
+            extends AbstractCounting<BiFunction<T, U, R>>
+            implements BiFunction<T, U, R> {
+
+        public CountingBiFunction(BiFunction<T, U, R> delegate) {
+            super(delegate);
+        }
+
+        @Override
+        public R apply(T t, U u) {
+            incrementCounter();
+            return delegate.apply(t, u);
+        }
+    }
+
+    abstract static class AbstractCounting<D> {
+
+        private final AtomicInteger cnt = new AtomicInteger();
+        protected final D delegate;
+
+        protected AbstractCounting(D delegate) {
+            this.delegate = delegate;
+        }
+
+        protected final void incrementCounter() {
+            cnt.incrementAndGet();
+        }
+
+        public final int cnt() {
+            return cnt.get();
+        }
+
+        @Override
+        public final String toString() {
+            return cnt.toString();
+        }
+    }
+
+    static Object functionHolder(Object o) {
+        try {
+            final Field field = field(o.getClass(), "functionHolder");
+            field.setAccessible(true);
+            return field.get(o);
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static Object functionHolderFunction(Object o) {
+        try {
+            final Field field = field(o.getClass(), "function");
+            field.setAccessible(true);
+            return field.get(o);
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static int functionHolderCounter(Object o) {
+        try {
+            final Field field = field(o.getClass(), "counter");
+            field.setAccessible(true);
+            return (int)field.get(o);
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static Supplier<?> computingFunction(LazyConstant<?> o) {
+        try {
+            final Field field = field(o.getClass(), "computingFunction");
+            field.setAccessible(true);
+            return (Supplier<?>) field.get(o);
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static Field field(Class<?> clazz, String name) {
+        if (clazz.equals(Object.class)) {
+            throw new RuntimeException("No " + name);
+        }
+        try {
+            return clazz.getDeclaredField(name);
+        } catch (NoSuchFieldException e) {
+            return field(clazz.getSuperclass(), name);
+        }
+    }
+
+}