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/foreign/loaderLookup/TestLoaderLookup.java
+++ b/test/jdk/java/foreign/loaderLookup/TestLoaderLookup.java
@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2021, 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
+ * @compile lookup/Lookup.java
+ * @compile invoker/Invoker.java
+ * @run main/othervm/native/timeout=480 --enable-native-access=ALL-UNNAMED TestLoaderLookup
+ */
+
+import java.lang.foreign.*;
+import java.lang.reflect.*;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.Paths;
+
+public class TestLoaderLookup {
+    public static void main(String[] args) throws ReflectiveOperationException {
+        ClassLoader loader1 = newClassLoader("lookup");
+        Class<?> lookup = loader1.loadClass("lookup.Lookup");
+        Method fooSymbol = lookup.getDeclaredMethod("fooSymbol");
+        MemorySegment foo = (MemorySegment) fooSymbol.invoke(null);
+
+        ClassLoader loader2 = newClassLoader("invoker");
+        Class<?> invoker = loader2.loadClass("invoker.Invoker");
+        Method invoke = invoker.getDeclaredMethod("invoke", MemorySegment.class);
+        invoke.invoke(null, foo);
+
+        loader1 = null;
+        lookup = null;
+        fooSymbol = null;
+        // Make sure that the loader is kept reachable
+        for (int i = 0 ; i < 1000 ; i++) {
+            invoke.invoke(null, foo); // might crash if loader1 is GC'ed
+            System.gc();
+        }
+    }
+
+    public static ClassLoader newClassLoader(String path) {
+        try {
+            return new URLClassLoader(new URL[] {
+                    Paths.get(System.getProperty("test.classes", path)).toUri().toURL(),
+            }, null);
+        } catch (MalformedURLException e){
+            throw new RuntimeException("Unexpected URL conversion failure", e);
+        }
+    }
+}