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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.
This commit is contained in:
russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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101
test/langtools/tools/javap/ClassWriterNoLineVariableTableTest.java Normal file
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/*
* Copyright (c) 2024, 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 8345145
* @summary javap should not print LineNumberTable/LocalVariableTable (-l) without disassembled code (-c).
* @compile -g ClassWriterNoLineVariableTableTest.java
* @run junit ClassWriterNoLineVariableTableTest
* @modules jdk.jdeps/com.sun.tools.javap
*/
import java.io.PrintWriter;
import java.io.StringWriter;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
import static org.junit.jupiter.api.Assertions.*;
public class ClassWriterNoLineVariableTableTest {
String expectedErrorOutput = "Warning: bad combination of options: -l without -c, line number and local variable tables will not be printed";
@Test
public void testJavapWithoutCodeAttribute() {
String output = javap("-l");
assertContains(output, expectedErrorOutput,
"javap should throw warning, when -l used without -c or -v");
assertNotContains(output, "LineNumberTable",
"There should be no LineNumberTable output when javap is provided l without -c or -v");
assertNotContains(output, "LocalVariableTable",
"There should be no LineNumberTable output when javap is provided l without -c or -v");
}
@ParameterizedTest(name = "Test javap with fixed option -l and varying option: {0}")
@ValueSource(strings = {"-v", "-c"})
public void testJavapWithCodeAttribute(String addedOption) {
String output = javap("-l", addedOption);
assertNotContains(output, expectedErrorOutput,
"There should be no warning when javap is provided -l and " + addedOption);
assertContains(output, "LineNumberTable",
"There should be LineNumberTable output when javap is provided -l and " + addedOption);
assertContains(output, "LocalVariableTable",
"There should be LocalVariableTable output when javap is provided -l and " + addedOption);
}
private static void assertContains(String actual, String expectedSubstring, String message) {
assertTrue(actual.contains(expectedSubstring),
message + " - Expected '" + actual + "' to contain '" + expectedSubstring + "'");
}
private static void assertNotContains(String actual, String expectedSubstring, String message) {
assertFalse(actual.contains(expectedSubstring),
message + " - Expected '" + actual + "' not to contain '" + expectedSubstring + "'");
}
private String javap(String... args) {
StringWriter sw = new StringWriter();
PrintWriter out = new PrintWriter(sw);
String[] fullArgs = new String[args.length + 1];
System.arraycopy(args, 0, fullArgs, 0, args.length);
fullArgs[args.length] = System.getProperty("test.classes") + "/RandomLoop8345145.class";
int rc = com.sun.tools.javap.Main.run(fullArgs, out);
if (rc != 0)
throw new Error("javap failed. rc=" + rc);
out.close();
System.out.println(sw);
return sw.toString();
}
}
class RandomLoop8345145 {
public void randomLoop() {
int x = 5;
for (int i = 0; i < 10; i++) {
x*=2;
}
}
}