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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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78
test/jdk/java/lang/StackWalker/NativeMethod.java Normal file
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/*
* Copyright (c) 2016, 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 8157892 8157977
* @summary Verify file name, line number and bci of native methods
* @run main/othervm/native -Xcheck:jni NativeMethod
*/
import java.lang.StackWalker.Option;
import java.lang.StackWalker.StackFrame;
import java.util.List;
import java.util.stream.Collectors;
public class NativeMethod {
public static void main(String... args) throws Exception {
new NativeMethod().test();
}
private final StackWalker walker;
NativeMethod() {
this.walker = StackWalker.getInstance(Option.SHOW_REFLECT_FRAMES);
}
// this native method will invoke NativeMethod::walk method
public native void test();
public void walk() {
List<StackFrame> nativeFrames = walker.walk(s ->
s.filter(StackFrame::isNativeMethod)
.collect(Collectors.toList())
);
assertTrue(nativeFrames.size() > 0, "native frame not found");
// find NativeMethod::test native frame
nativeFrames.stream().filter(f -> f.isNativeMethod()
&& f.getClassName().equals("NativeMethod")
&& f.getMethodName().equals("test"))
.findFirst()
.orElseThrow(() -> new RuntimeException("NativeMethod::test native method not found"));
for (StackFrame f : nativeFrames) {
assertTrue(f.getFileName() != null, "source file expected to be found");
assertTrue(f.getLineNumber() < 0, "line number expected to be unavailable");
assertTrue(f.getByteCodeIndex() < 0, "bci expected to be unavailable");
}
}
private static void assertTrue(boolean value, String msg) {
if (value != true)
throw new AssertionError(msg);
}
static {
System.loadLibrary("nativeMethod");
}
}