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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
commit 0a580b313d
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125
test/langtools/tools/javac/switchexpr/ExpressionSwitchToString.java Normal file
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/*
* Copyright (c) 2019, 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 8223305
* @summary Verify Tree.toString() related to switch expressions
* @modules jdk.compiler
*/
import java.net.URI;
import java.util.Arrays;
import java.util.List;
import javax.tools.*;
import com.sun.source.util.JavacTask;
public class ExpressionSwitchToString {
private static final String CODE =
"public class C {" +
" void t1(Integer i) {" +
" switch (i) {" +
" case null: i++; break;" +
" case 0, 1: i++; break;" +
" default: i++; break;" +
" }" +
" }" +
" int t2(Integer i) {" +
" return switch (i) {" +
" case null: yield 0;" +
" case 0, 1: yield 1;" +
" default: yield 2;" +
" }" +
" }" +
"}";
private static final String EXPECTED =
"\n" +
"public class C {\n" +
" \n" +
" void t1(Integer i) {\n" +
" switch (i) {\n" +
" case null:\n" +
" i++;\n" +
" break;\n" +
" \n" +
" case 0, 1:\n" +
" i++;\n" +
" break;\n" +
" \n" +
" default:\n" +
" i++;\n" +
" break;\n" +
" \n" +
" }\n" +
" }\n" +
" \n" +
" int t2(Integer i) {\n" +
" return switch (i) {\n" +
" case null:\n" +
" yield 0;\n" +
" \n" +
" case 0, 1:\n" +
" yield 1;\n" +
" \n" +
" default:\n" +
" yield 2;\n" +
" \n" +
" };\n" +
" }\n" +
"}";
public static void main(String[] args) throws Exception {
final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
assert tool != null;
DiagnosticListener<JavaFileObject> noErrors = d -> {};
String sourceVersion = Integer.toString(Runtime.version().feature());
JavacTask ct = (JavacTask) tool.getTask(null, null, noErrors,
List.of("-XDdev"), null,
Arrays.asList(new MyFileObject(CODE)));
String actualCode = ct.parse().iterator().next().toString();
actualCode = actualCode.replace(System.getProperty("line.separator"), "\n");
if (!EXPECTED.equals(actualCode)) {
throw new AssertionError("Unexpected toString outcome: " +
actualCode);
}
}
static class MyFileObject extends SimpleJavaFileObject {
private String text;
public MyFileObject(String text) {
super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
this.text = text;
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return text;
}
}
}