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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/OverwriteBetweenCompilations.java Normal file
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/*
* Copyright (c) 2014, 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
* @bug 8038455
* @summary Verify that annotation processor can overwrite source and class files it generated
* during previous compilations, and that the Symbols are updated appropriately.
* @library /tools/lib /tools/javac/lib/
* @modules jdk.compiler/com.sun.tools.javac.api
* jdk.compiler/com.sun.tools.javac.main
* jdk.compiler/com.sun.tools.javac.processing
* jdk.compiler/com.sun.tools.javac.util
* jdk.jdeps/com.sun.tools.javap
* @clean *
* @build toolbox.ToolBox toolbox.JavacTask
* @build OverwriteBetweenCompilations JavacTestingAbstractProcessor
* @compile/ref=OverwriteBetweenCompilations_1.out -XDaccessInternalAPI -processor OverwriteBetweenCompilations -Apass=1 -parameters -XDrawDiagnostics OverwriteBetweenCompilationsSource.java
* @compile/ref=OverwriteBetweenCompilations_2.out -XDaccessInternalAPI -processor OverwriteBetweenCompilations -Apass=2 -parameters -XDrawDiagnostics OverwriteBetweenCompilationsSource.java
* @compile/ref=OverwriteBetweenCompilations_3.out -XDaccessInternalAPI -processor OverwriteBetweenCompilations -Apass=3 -parameters -XDrawDiagnostics OverwriteBetweenCompilationsSource.java
*/
import java.io.*;
import java.util.*;
import javax.annotation.processing.*;
import javax.lang.model.element.*;
import javax.tools.*;
import com.sun.tools.javac.processing.JavacProcessingEnvironment;
import com.sun.tools.javac.processing.PrintingProcessor.PrintingElementVisitor;
import com.sun.tools.javac.util.Log;
import com.sun.tools.javac.util.Log.WriterKind;
import toolbox.JavacTask;
import toolbox.ToolBox;
@SupportedOptions("pass")
public class OverwriteBetweenCompilations extends JavacTestingAbstractProcessor {
int round = 1;
@Override
public boolean process(Set<? extends TypeElement> annotations,
RoundEnvironment roundEnv) {
Log log = Log.instance(((JavacProcessingEnvironment) processingEnv).getContext());
PrintWriter pw = log.getWriter(WriterKind.NOTICE);
pw.println("round: " + round);
TypeElement generatedSource =
processingEnv.getElementUtils().getTypeElement("GeneratedSource");
if (generatedSource != null) {
new PrintingElementVisitor(pw, processingEnv.getElementUtils()).visit(generatedSource);
pw.flush();
}
TypeElement generatedClass =
processingEnv.getElementUtils().getTypeElement("GeneratedClass");
if (generatedClass != null) {
new PrintingElementVisitor(pw, processingEnv.getElementUtils()).visit(generatedClass);
pw.flush();
}
int pass = Integer.parseInt(processingEnv.getOptions().get("pass"));
if (round++ == 1) {
try (Writer out = filer.createSourceFile("GeneratedSource").openWriter()) {
String code = pass != 2 ? GENERATED_INIT : GENERATED_UPDATE;
code = code.replace("NAME", "GeneratedSource");
out.write(code);
} catch (IOException e) {
processingEnv.getMessager().printError(e.toString());
}
try (OutputStream out = filer.createClassFile("GeneratedClass").openOutputStream()) {
String code = pass != 2 ? GENERATED_INIT : GENERATED_UPDATE;
code = code.replace("NAME", "GeneratedClass");
ToolBox tb = new ToolBox();
ToolBox.MemoryFileManager mfm = new ToolBox.MemoryFileManager();
new JavacTask(tb)
.fileManager(mfm)
.options("-parameters")
.sources(code)
.run();
out.write(mfm.getFileBytes(StandardLocation.CLASS_OUTPUT, "GeneratedClass"));
} catch (IOException e) {
processingEnv.getMessager().printError(e.toString());
}
}
return false;
}
//the initial generated class - "NAME" will be replaced with either "GeneratedSource" or
//"GeneratedClass" while generating the class:
private static final String GENERATED_INIT =
"@Deprecated\n" +
"public class NAME<T extends CharSequence> extends java.util.ArrayList<String>\n" +
" implements Runnable {\n" +
" public void test(int a) { }\n" +
" public void run() { }\n" +
"}";
//generated class update- "NAME" will be replaced with either "GeneratedSource" or
//"GeneratedClass" while generating the class:
private static final String GENERATED_UPDATE =
"@javax.annotation.processing.SupportedAnnotationTypes(\"*\")\n" +
"public abstract class NAME<E extends Number> extends java.util.LinkedList<Number>" +
" implements Runnable, CharSequence {\n" +
" public void test(long a) { }\n" +
"}";
}