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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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101
test/hotspot/jtreg/runtime/cds/appcds/jigsaw/classpathtests/EmptyClassInBootClassPath.java Normal file
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/*
* Copyright (c) 2015, 2025, 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
* @summary Test a few scenarios if an empty class, which has the same name as the one in the jimage, is specified in the -Xbootclasspath/a
* 1) boot loader will always load the class from the bootclasspath
* 2) app loader will load the class from the jimage by default;
* app loader will load the class from the bootclasspath if the
* "--limit-modules java.base" option is specified
* @requires vm.cds & !vm.graal.enabled
* @requires test.thread.factory == null
* @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds
* @modules java.base/jdk.internal.access
* @compile ../../test-classes/EmptyClassHelper.java
* @compile ../../test-classes/com/sun/tools/javac/Main.jasm
* @run driver EmptyClassInBootClassPath
*/
import java.io.File;
import java.lang.*;
import java.lang.reflect.*;
import java.util.List;
import java.util.ArrayList;
import jdk.test.lib.process.OutputAnalyzer;
public class EmptyClassInBootClassPath {
static final String EXPECTED_EXCEPTION =
"java.lang.NoSuchMethodException: com.sun.tools.javac.Main.main([Ljava.lang.String;)";
public static void main(String[] args) throws Exception {
String[] className = {"com/sun/tools/javac/Main"};
JarBuilder.build("emptyClass", className);
String appJar = TestCommon.getTestJar("emptyClass.jar");
JarBuilder.build("EmptyClassHelper", "EmptyClassHelper");
String helperJar = TestCommon.getTestJar("EmptyClassHelper.jar");
OutputAnalyzer dumpOutput = TestCommon.dump(
appJar, className, "-Xbootclasspath/a:" + appJar);
TestCommon.checkDump(dumpOutput);
dumpOutput.shouldNotContain("Preload Warning: skipping class from -Xbootclasspath/a " + className[0]);
String bootclasspath = "-Xbootclasspath/a:" + appJar;
String classPath = "-Djava.class.path=" + appJar + File.pathSeparator + helperJar;
List<String> argsList = new ArrayList<String>();
argsList.add(classPath);
argsList.add(bootclasspath);
argsList.add("--add-exports=java.base/jdk.internal.access=ALL-UNNAMED");
argsList.add("EmptyClassHelper");
// case 1: load class in bootclasspath using app loader
argsList.add("useAppLoader");
String[] opts = new String[argsList.size()];
opts = argsList.toArray(opts);
TestCommon.run(opts).assertNormalExit("appLoader found method main");
// case 2: load class in bootclasspath using boot loader
argsList.remove(argsList.size() - 1);
argsList.add("useBootLoader");
opts = new String[argsList.size()];
opts = argsList.toArray(opts);
TestCommon.run(opts).assertNormalExit(EXPECTED_EXCEPTION);
// case 3: load class in bootclasspath using app loader with '--limit-modules java.base'
argsList.add(0, "--limit-modules");
argsList.add(1, "java.base");
argsList.remove(argsList.size() - 1);
argsList.add("useAppLoader");
opts = new String[argsList.size()];
opts = argsList.toArray(opts);
TestCommon.run(opts)
.assertSilentlyDisabledCDS(0, EXPECTED_EXCEPTION);
// case 4: load class in bootclasspath using boot loader with '--limit-modules java.base'
argsList.remove(argsList.size() - 1);
argsList.add("useBootLoader");
opts = new String[argsList.size()];
opts = argsList.toArray(opts);
TestCommon.run(opts)
.assertSilentlyDisabledCDS(0, EXPECTED_EXCEPTION);
}
}