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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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78
test/hotspot/jtreg/runtime/HiddenClasses/HiddenClassStack.java Normal file
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/*
* Copyright (c) 2020, 2021, 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 that stack tracing isn't broken if an exception is thrown
* in a hidden class.
* DESCRIPTION
* An exception is thrown by a hidden class. Verify that the exception's
* stack trace contains the name of the current test class (i.e., verify
* that the stack trace is not broken).
* @library /test/lib
* @modules jdk.compiler
* @run main HiddenClassStack
*/
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.lang.invoke.MethodType;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*;
import jdk.test.lib.compiler.InMemoryJavaCompiler;
public class HiddenClassStack {
static byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass",
"public class TestClass { " +
" public TestClass() { " +
" throw new RuntimeException(\"boom\"); " +
" } } ");
public static void main(String[] args) throws Throwable {
// An exception is thrown by class loaded by lookup.defineHiddenClass().
// Verify that the exception's stack trace contains name of the current
// test class.
try {
Lookup lookup = MethodHandles.lookup();
Class<?> cl = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass();
Object obj = cl.newInstance();
throw new Exception("Expected RuntimeException not thrown");
} catch (RuntimeException e) {
if (!e.getMessage().contains("boom")) {
throw new RuntimeException("Wrong RuntimeException, e: " + e.toString());
}
ByteArrayOutputStream byteOS = new ByteArrayOutputStream();
PrintStream printStream = new PrintStream(byteOS);
e.printStackTrace(printStream);
printStream.close();
String stackTrace = byteOS.toString("ASCII");
if (!stackTrace.contains(HiddenClassStack.class.getName())) {
throw new RuntimeException("HiddenClassStack missing from stacktrace: " +
stackTrace);
}
}
}
}