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.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/lang/invoke/lambda/LambdaEagerInitTest.java
+++ b/test/jdk/java/lang/invoke/lambda/LambdaEagerInitTest.java
@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2020, 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 8242451
+ * @library /test/lib
+ * @summary Test that the LAMBDA_INSTANCE$ field is present depending
+ *          on disableEagerInitialization
+ * @run main LambdaEagerInitTest
+ * @run main/othervm -Djdk.internal.lambda.disableEagerInitialization=true LambdaEagerInitTest
+ */
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import static jdk.test.lib.Asserts.*;
+
+public class LambdaEagerInitTest {
+
+    interface H {Object m(String s);}
+
+    private static Set<String> allowedStaticFields(boolean nonCapturing) {
+        Set<String> s = new HashSet<>();
+        if (Boolean.getBoolean("jdk.internal.lambda.disableEagerInitialization")) {
+            if (nonCapturing) s.add("LAMBDA_INSTANCE$");
+        }
+        return s;
+    }
+
+    private void nonCapturingLambda() {
+        H la = s -> s;
+        assertEquals("hi", la.m("hi"));
+        Class<? extends H> c1 = la.getClass();
+        verifyLambdaClass(la.getClass(), true);
+    }
+
+    private void capturingLambda() {
+        H la = s -> concat(s, "foo");
+        assertEquals("hi foo", la.m("hi"));
+        verifyLambdaClass(la.getClass(), false);
+    }
+
+    private void verifyLambdaClass(Class<?> c, boolean nonCapturing) {
+        Set<String> staticFields = new HashSet<>();
+        Set<String> instanceFields = new HashSet<>();
+        for (Field f : c.getDeclaredFields()) {
+            if (Modifier.isStatic(f.getModifiers())) {
+                staticFields.add(f.getName());
+            } else {
+                instanceFields.add(f.getName());
+            }
+        }
+        assertEquals(instanceFields.size(), nonCapturing ? 0 : 1, "Unexpected instance fields");
+        assertEquals(staticFields, allowedStaticFields(nonCapturing), "Unexpected static fields");
+    }
+
+    private String concat(String... ss) {
+        return Arrays.stream(ss).collect(Collectors.joining(" "));
+    }
+
+    public static void main(String[] args) {
+        LambdaEagerInitTest test = new LambdaEagerInitTest();
+        test.nonCapturingLambda();
+        test.capturingLambda();
+    }
+}