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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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test/langtools/tools/javac/processing/rounds/MethodsDroppedBetweenRounds.java Normal file
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/*
* Copyright (c) 2014, 2015, 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 8038455
* @summary Ensure that Symbols for members (methods and fields) are dropped across annotation
* processing rounds. ClassSymbols need to be kept.
* @library /tools/javac/lib
* @modules java.compiler
* jdk.compiler
* @build JavacTestingAbstractProcessor MethodsDroppedBetweenRounds
* @compile/process -processor MethodsDroppedBetweenRounds MethodsDroppedBetweenRounds.java
*/
import java.lang.ref.WeakReference;
import java.util.*;
import javax.annotation.processing.*;
import javax.lang.model.element.*;
import javax.lang.model.util.ElementFilter;
public class MethodsDroppedBetweenRounds extends JavacTestingAbstractProcessor {
private static TypeElement currentClassSymbol;
private static WeakReference<ExecutableElement> keptMethod = null;
public boolean process(Set<? extends TypeElement> annos,RoundEnvironment rEnv) {
if (keptMethod != null) {
//force GC:
List<byte[]> hold = new ArrayList<>();
try {
while (true)
hold.add(new byte[1024 * 1024 * 1024]);
} catch (OutOfMemoryError err) { }
hold.clear();
if (keptMethod.get() != null) {
throw new IllegalStateException("Holds method across rounds.");
}
}
TypeElement currentClass = elements.getTypeElement("MethodsDroppedBetweenRounds");
if (currentClassSymbol != null && currentClassSymbol != currentClass) {
throw new IllegalStateException("Different ClassSymbols across rounds");
}
ExecutableElement method = ElementFilter.methodsIn(currentClass.getEnclosedElements()).get(0);
keptMethod = new WeakReference<>(method);
return true;
}
}