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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.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/hotspot/jtreg/runtime/modules/JVMAddReadsModule.java Normal file
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/*
* Copyright (c) 2016, 2022, 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
* @modules java.base/jdk.internal.misc
* @library /test/lib ..
* @build jdk.test.whitebox.WhiteBox
* @compile/module=java.base java/lang/ModuleHelper.java
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI JVMAddReadsModule
*/
import static jdk.test.lib.Asserts.*;
public class JVMAddReadsModule {
public static void main(String args[]) throws Throwable {
MyClassLoader from_cl = new MyClassLoader();
MyClassLoader to_cl = new MyClassLoader();
Object from_module, to_module;
from_module = ModuleHelper.ModuleObject("from_module", from_cl, new String[] { "mypackage" });
assertNotNull(from_module, "Module should not be null");
ModuleHelper.DefineModule(from_module, false, "9.0", "from_module/here", new String[] { "mypackage" });
to_module = ModuleHelper.ModuleObject("to_module", to_cl, new String[] { "yourpackage" });
assertNotNull(to_module, "Module should not be null");
ModuleHelper.DefineModule(to_module, false, "9.0", "to_module/here", new String[] { "yourpackage" });
// Null from_module argument, expect NPE
try {
ModuleHelper.AddReadsModule(null, to_module);
throw new RuntimeException("Failed to get the expected NPE");
} catch (NullPointerException e) {
// Expected
}
// Null to_module argument, expect NPE
try {
ModuleHelper.AddReadsModule(from_module, null);
throw new RuntimeException("Unexpected NPE was thrown");
} catch (NullPointerException e) {
// Expected
}
// Null from_module and to_module arguments, expect NPE
try {
ModuleHelper.AddReadsModule(null, null);
throw new RuntimeException("Failed to get the expected NPE");
} catch (NullPointerException e) {
// Expected
}
// Both modules are the same, should not throw an exception
ModuleHelper.AddReadsModule(from_module, from_module);
// Duplicate calls, should not throw an exception
ModuleHelper.AddReadsModule(from_module, to_module);
ModuleHelper.AddReadsModule(from_module, to_module);
}
static class MyClassLoader extends ClassLoader { }
}