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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/hotspot/jtreg/runtime/ClassFile/NestedAnnotations.java Normal file
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/*
* Copyright (c) 2026, 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 NestedAnnotations
* @summary The JVM handles nested annotations
* @bug 8364655
* @requires vm.flagless
* @library /test/lib
* @library /testlibrary/asm
* @modules java.base/jdk.internal.misc
* java.desktop
* java.management
* @run driver NestedAnnotations
*/
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassWriter;
import java.lang.invoke.MethodHandles;
import java.util.ArrayList;
import static org.objectweb.asm.Opcodes.*;
public class NestedAnnotations {
static void test() throws Exception {
var cw = new ClassWriter(0);
cw.visit(V17, 0, "Annotations", null, "java/lang/Object", null);
final int number_of_annotations = 65535;
var av = cw.visitAnnotation("LTest;", true);
var stack = new ArrayList<AnnotationVisitor>(number_of_annotations + 1);
stack.add(av);
for (int i = 0; i < number_of_annotations; i++) {
stack.add(av = av.visitAnnotation("value", "LTest;"));
}
for (int i = number_of_annotations; i != 0;) {
stack.get(--i).visitEnd();
}
cw.visitEnd();
// Does not matter whether the class is hidden, used for simplicity's sake.
MethodHandles.lookup().defineHiddenClass(cw.toByteArray(), true);
}
public static void main(String[] args) throws Exception {
if (args.length == 1 && args[0].equals("testIt")) {
test();
} else {
OutputAnalyzer oa = ProcessTools.executeTestJava("NestedAnnotations", "testIt");
oa.shouldHaveExitValue(0);
}
}
}