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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/jdk/java/foreign/enablenativeaccess/NativeAccessDynamicMain.java Normal file
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/*
* Copyright (c) 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.
*/
import java.nio.file.Path;
import java.nio.file.Paths;
import java.lang.Module;
import java.lang.ModuleLayer;
import java.lang.module.ModuleFinder;
import java.lang.module.ModuleReference;
import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;
import java.util.stream.Collectors;
// This class creates a dynamic module layer and loads the
// panama_module in it. enableNativeAccess on that dynamic
// module is called depending on the command line option.
//
// Usage:
// java --enable-native-access=ALL-UNNAMED NativeAccessDynamicMain <module-path> <mod/class> <true|false> [main-args]
public class NativeAccessDynamicMain {
public static void main(String[] args) throws Exception {
String modulePath = args[0];
String moduleAndClsName = args[1];
boolean enableNativeAccess = Boolean.parseBoolean(args[2]);
String[] mainArgs = args.length > 2? Arrays.copyOfRange(args, 3, args.length) : new String[0];
int idx = moduleAndClsName.indexOf('/');
String moduleName = moduleAndClsName.substring(0, idx);
String className = moduleAndClsName.substring(idx+1);
Path[] paths = Stream.of(modulePath.split(File.pathSeparator))
.map(Paths::get)
.toArray(Path[]::new);
ModuleFinder mf = ModuleFinder.of(paths);
var mrefs = mf.findAll();
if (mrefs.isEmpty()) {
throw new RuntimeException("No modules module path: " + modulePath);
}
var rootMods = mrefs.stream().
map(mr->mr.descriptor().name()).
collect(Collectors.toSet());
ModuleLayer boot = ModuleLayer.boot();
var conf = boot.configuration().
resolve(mf, ModuleFinder.of(), rootMods);
String firstMod = rootMods.iterator().next();
URLClassLoader cl = new URLClassLoader(new URL[] { paths[0].toFile().toURL() });
ModuleLayer.Controller controller = boot.defineModulesWithOneLoader(conf, List.of(boot), cl);
ModuleLayer layer = controller.layer();
Module mod = layer.findModule(firstMod).get();
// conditionally grant native access to the dynamic module created
if (enableNativeAccess) {
controller.enableNativeAccess(mod);
}
Class mainCls = Class.forName(mod, className);
var main = mainCls.getMethod("main", String[].class);
main.invoke(null, (Object)mainArgs);
}
}