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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
commit 0a580b313d
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test/hotspot/jtreg/runtime/classFileParserBug/TestEmptyBootstrapMethodsAttr.java Normal file
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/*
* Copyright (c) 2014, 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 TestEmptyBootstrapMethodsAttr
* @bug 8041918
* @library /test/lib
* @summary Test empty bootstrap_methods table within BootstrapMethods attribute
* @requires vm.flagless
* @modules java.base/jdk.internal.misc
* java.management
* @compile emptynumbootstrapmethods1.jcod emptynumbootstrapmethods2.jcod
* @run driver TestEmptyBootstrapMethodsAttr
*/
import java.io.File;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
public class TestEmptyBootstrapMethodsAttr {
public static void main(String args[]) throws Throwable {
System.out.println("Regression test for bug 8041918");
// Test case #1:
// Try loading class with empty bootstrap_methods table where no
// other attributes are following BootstrapMethods in attribute table.
String className = "emptynumbootstrapmethods1";
// ======= execute test case #1
// Expect a lack of main method, this implies that the class loaded correctly
// with an empty bootstrap_methods and did not generate a ClassFormatError.
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
"-Duser.language=en", "-Duser.country=US", className);
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldNotContain("java.lang.ClassFormatError");
output.shouldHaveExitValue(1);
boolean vthreadMode = pb.command().toString().contains("test.thread.factory=Virtual");
if (vthreadMode) {
output.shouldContain("java.lang.NoSuchMethodException: " + className + ".main");
} else {
output.shouldContain("Main method not found in class " + className);
}
// Test case #2:
// Try loading class with empty bootstrap_methods table where an
// AnnotationDefault attribute follows the BootstrapMethods in the attribute table.
className = "emptynumbootstrapmethods2";
// ======= execute test case #2
// Expect a lack of main method, this implies that the class loaded correctly
// with an empty bootstrap_methods and did not generate ClassFormatError.
pb = ProcessTools.createLimitedTestJavaProcessBuilder(
"-Duser.language=en", "-Duser.country=US", className);
output = new OutputAnalyzer(pb.start());
output.shouldNotContain("java.lang.ClassFormatError");
output.shouldHaveExitValue(1);
vthreadMode = pb.command().toString().contains("test.thread.factory=Virtual");
if (vthreadMode) {
output.shouldContain("java.lang.NoSuchMethodException: " + className + ".main");
} else {
output.shouldContain("Main method not found in class " + className);
}
}
}