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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/jdk/java/math/BigInteger/CompareToTests.java Normal file
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/*
* Copyright (c) 2006, 2025, 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 6473768
* @summary Tests of BigInteger.compareTo
*/
import java.math.*;
import static java.math.BigInteger.*;
public class CompareToTests {
private static int compareToTests() {
int failures = 0;
final BigInteger MINUS_ONE = BigInteger.ONE.negate();
final BigInteger TWO_POW_126 = ONE.shiftLeft(126);
final BigInteger TWO_POW_127 = ONE.shiftLeft(127);
final BigInteger TWO_POW_128 = ONE.shiftLeft(128);
// First operand, second operand, expected compareTo result
BigInteger [][] testCases = {
// Basics
{valueOf(0), valueOf(0), ZERO},
{valueOf(0), valueOf(1), MINUS_ONE},
{valueOf(1), valueOf(2), MINUS_ONE},
{valueOf(2), valueOf(1), ONE},
{valueOf(10), valueOf(10), ZERO},
// Various relative lengths of internal mag array.
{TWO_POW_127, TWO_POW_127, ZERO},
{TWO_POW_127.negate(), TWO_POW_127, MINUS_ONE},
{TWO_POW_128.or(TWO_POW_126), TWO_POW_128, ONE},
{TWO_POW_128.or(TWO_POW_126), TWO_POW_128.negate(), ONE},
{TWO_POW_128, TWO_POW_128.or(TWO_POW_126), MINUS_ONE},
{TWO_POW_128.negate(), TWO_POW_128.or(TWO_POW_126), MINUS_ONE},
{TWO_POW_127, TWO_POW_128, MINUS_ONE},
{TWO_POW_127.negate(), TWO_POW_128, MINUS_ONE},
{TWO_POW_128, TWO_POW_127, ONE},
{TWO_POW_128.negate(), TWO_POW_127, MINUS_ONE},
// Long boundary and near boundary values
{valueOf(Long.MAX_VALUE), valueOf(Long.MAX_VALUE), ZERO},
{valueOf(Long.MAX_VALUE).negate(), valueOf(Long.MAX_VALUE), MINUS_ONE},
{valueOf(Long.MAX_VALUE-1), valueOf(Long.MAX_VALUE), MINUS_ONE},
{valueOf(Long.MAX_VALUE-1).negate(), valueOf(Long.MAX_VALUE), MINUS_ONE},
{valueOf(Long.MIN_VALUE), valueOf(Long.MAX_VALUE), MINUS_ONE},
{valueOf(Long.MIN_VALUE).negate(), valueOf(Long.MAX_VALUE), ONE},
{valueOf(Long.MIN_VALUE+1), valueOf(Long.MAX_VALUE), MINUS_ONE},
{valueOf(Long.MIN_VALUE+1).negate(), valueOf(Long.MAX_VALUE), ZERO},
{valueOf(Long.MAX_VALUE), valueOf(Long.MIN_VALUE), ONE},
{valueOf(Long.MAX_VALUE).negate(), valueOf(Long.MIN_VALUE), ONE},
{valueOf(Long.MAX_VALUE-1), valueOf(Long.MIN_VALUE), ONE},
{valueOf(Long.MAX_VALUE-1).negate(), valueOf(Long.MIN_VALUE), ONE},
{valueOf(Long.MIN_VALUE), valueOf(Long.MIN_VALUE), ZERO},
{valueOf(Long.MIN_VALUE).negate(), valueOf(Long.MIN_VALUE), ONE},
{valueOf(Long.MIN_VALUE+1), valueOf(Long.MIN_VALUE), ONE},
{valueOf(Long.MIN_VALUE+1).negate(), valueOf(Long.MIN_VALUE), ONE},
};
for (BigInteger[] testCase : testCases) {
BigInteger a = testCase[0];
BigInteger a_negate = a.negate();
BigInteger b = testCase[1];
BigInteger b_negate = b.negate();
int expected = testCase[2].intValue();
failures += compareToTest(a, b, expected);
failures += compareToTest(a_negate, b_negate, -expected);
}
return failures;
}
private static int compareToTest(BigInteger a, BigInteger b, int expected) {
int result = a.compareTo(b);
int failed = (result==expected) ? 0 : 1;
if (failed == 1) {
System.err.println("(" + a + ").compareTo(" + b + ") => " + result +
"\n\tExpected " + expected);
}
return failed;
}
public static void main(String argv[]) {
int failures = 0;
failures += compareToTests();
if (failures > 0) {
throw new RuntimeException("Incurred " + failures +
" failures while testing exact compareTo.");
}
}
}