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/instrument/appendToClassLoaderSearch/BasicTest.java

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+/*
+ * 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.
+ */
+
+/*
+ *
+ *
+ * Basic unit test for Instrumentation appendToBootstrapClassLoaderSearch and
+ * appendToSystemClassLoaderSearch methods:
+ *
+ * 1. Adds a jar file to the bootstrap class loader search; Loads a class known
+ *    to be in the jar file and checks that it was loaded by the bootstrap class
+ *    loader.
+ *
+ * 2. Adds a jar file to the system class loader search; Loads a class known
+ *    to be in the jar file and checks that it was indeed loaded by the system
+ *    class loader.
+ */
+import java.lang.instrument.Instrumentation;
+import java.util.jar.JarFile;
+import java.io.IOException;
+
+public class BasicTest {
+
+    // count of failures
+    static int failures = 0;
+
+    // check that the given class is loaded by the given loader
+    static void checkLoadedByLoader(String name, ClassLoader loader) {
+        try {
+            Class cl = Class.forName(name);
+            ClassLoader actual = cl.getClassLoader();
+            String loaderName = (actual == null) ? "boot class loader" : actual.toString();
+            if (actual != loader) {
+                System.out.println("FAIL: " + name + " incorrectly loaded by: " + loaderName);
+                failures++;
+            } else {
+                System.out.println("PASS: " + name + " loaded by: " + loaderName);
+            }
+        } catch (Exception x) {
+            System.out.println("FAIL: Unable to load " + name + ":" + x);
+            failures++;
+        }
+    }
+
+    public static void main(String args[]) throws IOException {
+        JarFile bootclasses = new JarFile("BootSupport.jar");
+        JarFile agentclasses = new JarFile("AgentSupport.jar");
+
+        Instrumentation ins = Agent.getInstrumentation();
+
+        // Test 1: Add BootSupport.jar to boot class path and check that
+        // BootSupport is loaded by the bootstrap class loader
+        ins.appendToBootstrapClassLoaderSearch(bootclasses);
+        checkLoadedByLoader("BootSupport", null);
+
+        // Test 2: Add AgentSupport.jar to the system class path and check that
+        // AgentSupport is loaded by the system class loader.
+        try {
+            ins.appendToSystemClassLoaderSearch(agentclasses);
+            checkLoadedByLoader("AgentSupport", ClassLoader.getSystemClassLoader());
+        } catch (UnsupportedOperationException x) {
+            System.out.println("System class loader does not support adding to class path");
+        }
+
+        // throw exception if a test failed
+        if (failures > 0) {
+            throw new RuntimeException(failures + " test(s) failed.");
+        }
+    }
+}