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/IsModifiableClassAgent.java
+++ b/test/jdk/java/lang/instrument/IsModifiableClassAgent.java
@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2005, 2015, 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 6331574
+ * @summary test isModifiableClass
+ * @author Robert Field, Sun Microsystems
+ *
+ * @run build IsModifiableClassApp IsModifiableClassAgent
+ * @run shell MakeJAR3.sh IsModifiableClassAgent 'Can-Retransform-Classes: true'
+ * @run main/othervm -javaagent:IsModifiableClassAgent.jar IsModifiableClassApp
+ */
+import java.lang.instrument.*;
+
+public class IsModifiableClassAgent
+{
+    public static boolean fail = false;
+    public static boolean completed = false;
+
+    public static void
+    premain(    String agentArgs,
+                Instrumentation instrumentation)
+        {
+            System.out.println("IsModifiableClassAgent started");
+
+            Class[] allClasses = instrumentation.getAllLoadedClasses();
+            int modCount = 0;
+            int unmodCount = 0;
+
+            for (int i = 0; i < allClasses.length; i++)
+                {
+                    Class klass = allClasses[i];
+                    boolean isMod = instrumentation.isModifiableClass(klass);
+                    if (isMod && klass.isArray()) {
+                        System.err.println("Error: array class returned as modifiable: " + klass);
+                        fail = true;
+                    }
+                    if (isMod && klass.isPrimitive()) {
+                        System.err.println("Error: primitive class returned as modifiable: " + klass);
+                        fail = true;
+                    }
+                    try {
+                        instrumentation.retransformClasses(klass);
+                        if (!isMod) {
+                            System.err.println("Error: unmodifiable class retransformable: " + klass);
+                            fail = true;
+                        }
+                    } catch (UnmodifiableClassException e) {
+                        if (isMod) {
+                            System.err.println("Error: modifiable class not retransformable: " + klass);
+                            System.err.println("  exception: " + e);
+                            fail = true;
+                        }
+                    } catch (Throwable e) {
+                        System.err.println("Error: bad return from retransform: " + klass);
+                        System.err.println("  ERROR: " + e);
+                        fail = true;
+                    }
+                    if (isMod) {
+                        ++modCount;
+                    } else {
+                        ++unmodCount;
+                    }
+                }
+            System.out.println("modifiable: " + modCount + ". unmodifiable: " + unmodCount);
+            completed = true;
+        }
+}