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/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/NoClassDefFoundErrorTest.java

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+/*
+ * Copyright (c) 2017, 2024, 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 8056900 8338888
+ * @summary Verifies message returned with NoClassDefFoundError exception.
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          java.compiler
+ * @run main/native/othervm -Xlog:exceptions=info NoClassDefFoundErrorTest
+ */
+
+import jdk.test.lib.compiler.InMemoryJavaCompiler;
+import jdk.internal.misc.Unsafe;
+
+public class NoClassDefFoundErrorTest {
+
+    // Use the specified name
+    static native void callDefineClass(String className);
+    static native void callFindClass(String className);
+    // Use a name longer than a Java string - returns false
+    // if native allocation failed.
+    static native boolean tryCallDefineClass();
+    static native boolean tryCallFindClass();
+
+    static {
+        System.loadLibrary("NoClassDefFoundErrorTest");
+    }
+
+
+    public static void main(String args[]) throws Exception {
+        Unsafe unsafe = Unsafe.getUnsafe();
+
+        byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
+
+        // Create a class name of length 65536.
+        StringBuilder tooBigClassName = new StringBuilder("z");
+        for (int x = 0; x < 16; x++) {
+            tooBigClassName = tooBigClassName.append(tooBigClassName);
+        }
+
+        System.out.println("Test JVM_DefineClass() with long name");
+        try {
+            unsafe.defineClass(tooBigClassName.toString(), klassbuf, 4, klassbuf.length - 4, null, null);
+            throw new RuntimeException("defineClass did not throw expected NoClassDefFoundError");
+        } catch (NoClassDefFoundError e) {
+            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
+                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
+            }
+        }
+
+        System.out.println("Test JNI_DefineClass() with long name");
+        try {
+            callDefineClass(tooBigClassName.toString());
+            throw new RuntimeException("DefineClass did not throw expected NoClassDefFoundError");
+        } catch (NoClassDefFoundError e) {
+            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
+                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
+            }
+        }
+
+        System.out.println("Test JNI_FindClass() with long name");
+        try {
+            callFindClass(tooBigClassName.toString());
+            throw new RuntimeException("FindClass did not throw expected NoClassDefFoundError");
+        } catch (NoClassDefFoundError e) {
+            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
+                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
+            }
+        }
+
+        System.out.println("Test JNI_FindClass() with null name");
+        try {
+            callFindClass(null);
+            throw new RuntimeException("FindClass did not throw expected NoClassDefFoundError");
+        } catch (NoClassDefFoundError e) {
+            if (!e.getMessage().contains("No class name given")) {
+                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
+            }
+        }
+
+        System.out.println("Test JNI_DefineClass() with giant name");
+        try {
+            if (tryCallDefineClass()) {
+                throw new RuntimeException("DefineClass did not throw expected NoClassDefFoundError");
+            } else {
+                System.out.println("Test skipped due to native allocation failure");
+            }
+        } catch (NoClassDefFoundError e) {
+            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
+                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
+            }
+        }
+
+        System.out.println("Test JNI_FindClass() with giant name");
+        try {
+            if (tryCallFindClass()) {
+                throw new RuntimeException("FindClass did not throw expected NoClassDefFoundError");
+            } else {
+                System.out.println("Test skipped due to native allocation failure");
+            }
+        } catch (NoClassDefFoundError e) {
+            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
+                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
+            }
+        }
+    }
+}