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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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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.
This commit is contained in:
russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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166
test/jdk/java/lang/instrument/HiddenClass/HiddenClassAgent.java Normal file
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/*
* Copyright (c) 2020, 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
* @library /test/lib
* @modules java.instrument
* jdk.compiler
* @build jdk.test.lib.compiler.CompilerUtils
* jdk.test.lib.Utils *
* @run shell ../MakeJAR3.sh HiddenClassAgent 'Can-Retransform-Classes: true'
* @run main/othervm/native -javaagent:HiddenClassAgent.jar HiddenClassApp
*/
import java.lang.instrument.*;
/* Test that Instrumentation getAllLoadedClasses includes
* hidden classes but getInitiatedClasses does not.
* Check that all hidden classes are non-retransformable.
*/
public class HiddenClassAgent extends Thread {
private static volatile boolean completed = false;
private static volatile boolean failed = false;
private static volatile boolean hiddenClassLoaded = false;
private static Instrumentation instr = null;
private static Object monitor = new Object();
static void log(String str) { System.err.println(str); }
public static boolean failed() { return failed; }
public static
boolean checkWaitForCompleteness() {
try {
synchronized (monitor) {
while (!completed) {
monitor.wait(100);
}
}
} catch (InterruptedException ex) {
ex.printStackTrace();
log("HiddenClassAgent: waitCheckForCompletness: Caught InterruptedException: " + ex);
}
return completed;
}
public static
void setHiddenClassLoaded() {
synchronized (monitor) {
hiddenClassLoaded = true;
monitor.notifyAll();
}
}
private static
void waitForHiddenClassLoad() {
try {
synchronized (monitor) {
while (!hiddenClassLoaded) {
monitor.wait(100);
}
}
} catch (InterruptedException ex) {
ex.printStackTrace();
log("HiddenClassAgent: waitForHiddenClassLoad: Caught InterruptedException: " + ex);
}
}
private static
ClassLoader testGetAllLoadedClasses() {
boolean hiddenClassFound = false;
ClassLoader loader = null;
Class<?>[] classes = instr.getAllLoadedClasses();
for (int i = 0; i < classes.length; i++) {
Class klass = classes[i];
if (!klass.isHidden() || !klass.getName().contains("HiddenClass/")) {
continue;
}
log("HiddenClassAgent: getAllLoadedClasses returned hidden class: " + klass);
hiddenClassFound = true;
loader = klass.getClassLoader();
log("HiddenClassAgent: class loader of hidden class: " + loader);
try {
instr.retransformClasses(klass);
log("HiddenClassAgent: FAIL: hidden class is retransformable: " + klass);
failed = true;
} catch (UnmodifiableClassException e) {
log("HiddenClassAgent: Got expected UnmodifiableClassException for class: " + klass);
} catch (Throwable e) {
log("HiddenClassAgent: FAIL: unexpected throwable in hidden class retransform: " + klass);
log("HiddenClassAgent: got Throwable" + e);
failed = true;
}
}
if (!hiddenClassFound) {
log("HiddenClassAgent: FAIL: a hidden class is not found in getAllLoadedClasses list");
failed = true;
}
return loader;
}
private static
void testGetInitiatedClasses(ClassLoader loader) {
Class<?>[] classes = instr.getInitiatedClasses(loader);
for (int i = 0; i < classes.length; i++) {
Class klass = classes[i];
if (klass.isHidden()) {
log("HiddenClassAgent: FAIL: getInitiatedClasses returned hidden class: " + klass);
failed = true;
return;
}
}
log("HiddenClassAgent: getInitiatedClasses returned no hidden classes as expected");
}
public static void
premain(String agentArgs, Instrumentation instrumentation) {
instr = instrumentation;
Thread agentThread = new HiddenClassAgent();
agentThread.start();
}
public void run () {
log("HiddenClassAgent: started");
waitForHiddenClassLoad();
// Test getAllLoadedClasses
ClassLoader loader = testGetAllLoadedClasses();
// Test getInitiatedClasses
testGetInitiatedClasses(null);
if (loader != null) {
testGetInitiatedClasses(loader);
}
synchronized (monitor) {
completed = true;
monitor.notifyAll();
}
log("HiddenClassAgent: finished");
}
}