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/instrument/appendToClassLoaderSearch/DynamicTest.java
+++ b/test/jdk/java/lang/instrument/appendToClassLoaderSearch/DynamicTest.java
@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2005, 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.
+ */
+
+/*
+ *
+ *
+ * Unit test for Instrumentation appendToBootstrapClassLoaderSearch method.
+ * The test works as follows:
+ *
+ * 1. Load class "Application" and execute the doSomething() method
+ *
+ * 2. Append Tracer.jar to the boot class path - Tracer.jar has a single
+ *    class org.tools.Tracer.
+ *
+ * 3. Redefine class "Application" - the redefined version has an instrumented
+ *    version of doSomething() that invokes a method in org.tools.Tracer.
+ *
+ * 4. Re-execute doSomething() - this should provoke the loading of org.tools.Tracer
+ *    from the jar file. If updated version of doSomething() executes then test
+ *    passes.
+ */
+import java.lang.instrument.*;
+import java.util.jar.JarFile;
+import java.io.*;
+
+public class DynamicTest {
+
+    public static void main(String args[]) throws Exception {
+
+        // Load Application
+        Application app = new Application();
+        if (app.doSomething() != 1) {
+            throw new RuntimeException("Test configuration error - doSomething should return 1");
+        }
+
+        // Add org.tools.Tracer package to the boot class path
+        JarFile jf = new JarFile("Tracer.jar");
+        Agent.getInstrumentation().appendToBootstrapClassLoaderSearch(jf);
+
+        // Redefine Application with the instrumented version
+        File f = new File("InstrumentedApplication.bytes");
+        int len = (int)f.length();
+        byte[] def = new byte[len];
+
+        FileInputStream fis = new FileInputStream(f);
+        int nread = 0;
+        do {
+            int n = fis.read(def, nread, len-nread);
+            if (n > 0) {
+                nread += n;
+            }
+        } while (nread < len);
+
+        ClassDefinition classDefs = new ClassDefinition(Application.class, def);
+        Agent.getInstrumentation().redefineClasses(new ClassDefinition[] { classDefs } );
+
+        // Re-execute doSomething() - should get 3 messages printed
+        int res = app.doSomething();
+        if (res != 3) {
+            throw new RuntimeException("FAIL: redefined Application returned: " + res);
+        }
+        System.out.println("PASS: Test passed.");
+    }
+}