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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/compiler/vectorapi/VectorReverseBytesTest.java Normal file
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/*
* Copyright (c) 2022, Arm Limited. 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.
*/
package compiler.vectorapi;
import compiler.lib.ir_framework.*;
import java.util.Random;
import jdk.incubator.vector.ByteVector;
import jdk.incubator.vector.VectorMask;
import jdk.incubator.vector.VectorOperators;
import jdk.incubator.vector.VectorSpecies;
import jdk.test.lib.Asserts;
import jdk.test.lib.Utils;
/**
* @test
* @bug 8290485
* @key randomness
* @library /test/lib /
* @summary [vectorapi] REVERSE_BYTES for byte type should not emit any instructions
* @requires vm.compiler2.enabled
* @requires (os.simpleArch == "x64" & vm.cpu.features ~= ".*avx2.*") | os.arch == "aarch64" |
* (os.arch == "riscv64" & vm.cpu.features ~= ".*zvbb.*")
* @modules jdk.incubator.vector
*
* @run driver compiler.vectorapi.VectorReverseBytesTest
*/
public class VectorReverseBytesTest {
private static final VectorSpecies<Byte> B_SPECIES = ByteVector.SPECIES_MAX;
private static int LENGTH = 1024;
private static final Random RD = Utils.getRandomInstance();
private static byte[] input;
private static byte[] output;
private static boolean[] m;
static {
input = new byte[LENGTH];
output = new byte[LENGTH];
m = new boolean[LENGTH];
for (int i = 0; i < LENGTH; i++) {
input[i] = (byte) RD.nextInt(25);
m[i] = RD.nextBoolean();
}
}
@Test
@IR(failOn = IRNode.REVERSE_BYTES_VB)
public static void testReverseBytesV() {
for (int i = 0; i < LENGTH; i += B_SPECIES.length()) {
ByteVector v = ByteVector.fromArray(B_SPECIES, input, i);
v.lanewise(VectorOperators.REVERSE_BYTES).intoArray(output, i);
}
// Verify results
for (int i = 0; i < LENGTH; i++) {
Asserts.assertEquals(input[i], output[i]);
}
}
@Test
@IR(failOn = IRNode.REVERSE_BYTES_VB)
@IR(failOn = IRNode.VECTOR_BLEND_B)
public static void testReverseBytesVMasked() {
VectorMask<Byte> mask = VectorMask.fromArray(B_SPECIES, m, 0);
for (int i = 0; i < LENGTH; i += B_SPECIES.length()) {
ByteVector v = ByteVector.fromArray(B_SPECIES, input, i);
v.lanewise(VectorOperators.REVERSE_BYTES, mask).intoArray(output, i);
}
// Verify results
for (int i = 0; i < LENGTH; i++) {
Asserts.assertEquals(input[i], output[i]);
}
}
public static void main(String[] args) {
TestFramework.runWithFlags("--add-modules=jdk.incubator.vector");
}
}