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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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65
test/langtools/tools/javap/VerificationTest.java Normal file
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/*
* Copyright (c) 2024, 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
* @bug 8182774
* @summary test on class with a verification error
* @modules jdk.jdeps/com.sun.tools.javap
*/
import java.io.*;
import java.lang.classfile.ClassFile;
import java.lang.constant.ClassDesc;
import java.lang.constant.ConstantDescs;
import java.nio.file.Path;
import java.util.*;
public class VerificationTest {
public static void main(String... args) throws Exception {
new VerificationTest().run();
}
void run() throws Exception {
String testClasses = System.getProperty("test.classes");
String invalidClass = "InvalidClass";
ClassFile.of(ClassFile.StackMapsOption.DROP_STACK_MAPS).buildTo(Path.of(testClasses, invalidClass + ".class"), ClassDesc.of(invalidClass), clb ->
clb.withMethodBody("methodWithMissingStackMap", ConstantDescs.MTD_void, 0, cob ->
cob.iconst_0().ifThen(tb -> tb.nop()).return_()));
String out = javap("-verify", "-classpath", testClasses, invalidClass);
if (!out.contains("Expecting a stackmap frame at branch target")) {
throw new Exception("Expected output not found");
}
}
String javap(String... args) throws Exception {
StringWriter sw = new StringWriter();
PrintWriter out = new PrintWriter(sw);
int rc = com.sun.tools.javap.Main.run(args, out);
out.close();
System.out.println(sw.toString());
if (rc < 0)
throw new Exception("javap exited, rc=" + rc);
return sw.toString();
}
}