103 lines
4.0 KiB
Java
103 lines
4.0 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2020, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8193518 8249608
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* @summary C2: Vector registers are sometimes corrupted at safepoint
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* @run main/othervm -XX:-BackgroundCompilation -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCountedLoopSafepoints -XX:LoopStripMiningIter=2 -XX:-TieredCompilation TestVectorsNotSavedAtSafepoint test1
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* @run main/othervm -XX:-BackgroundCompilation TestVectorsNotSavedAtSafepoint test2
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*/
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import java.util.Arrays;
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public class TestVectorsNotSavedAtSafepoint {
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static void test1(byte[] barray1, byte[] barray2, byte[] barray3, long[] larray, long v) {
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// Uses wide vectors, v in vector registers is live at the
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// safepoint of the outer strip mined loop
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for (int i = 0; i < larray.length; i++) {
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larray[i] = v;
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}
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// Runs for few iterations so limited unrolling and short
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// vectors
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for (int i = 0; i < barray3.length; i++) {
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barray3[i] = (byte)(barray1[i] + barray2[i]);
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}
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}
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public static void test2(int[] iArr, long[] lArr) {
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// Loop with wide and non-wide vectors
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for (int i = 0; i < lArr.length; i++) {
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iArr[i] = 1;
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lArr[i] = 1;
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}
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}
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static class GarbageProducerThread extends Thread {
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public void run() {
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for(;;) {
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// Produce some garbage and then let the GC do its work which will
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// corrupt vector registers if they are not saved at safepoints.
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Object[] arrays = new Object[1024];
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for (int i = 0; i < arrays.length; i++) {
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arrays[i] = new int[1024];
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}
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System.gc();
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}
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}
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}
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public static void main(String[] args) {
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Thread garbage_producer = new GarbageProducerThread();
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garbage_producer.setDaemon(true);
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garbage_producer.start();
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if (args[0].equals("test1")) {
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byte[] bArr = new byte[10];
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long[] lArr = new long[1000];
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for (int i = 0; i < 10_000; ++i) {
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test1(bArr, bArr, bArr, lArr, -1);
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for (int j = 0; j < lArr.length; ++j) {
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if (bArr[j % 10] != 0 || lArr[j] != -1) {
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throw new RuntimeException("Test1 failed at iteration " + i + ": bArr[" + (j % 10) + "] = " + bArr[j % 10] + ", lArr[" + j + "] = " + lArr[j]);
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}
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}
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}
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} else {
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int iArr[] = new int[100];
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long lArr[] = new long[100];
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for (int i = 0; i < 10_000; ++i) {
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test2(iArr, lArr);
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for (int j = 0; j < lArr.length; ++j) {
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if (iArr[j] != 1 || lArr[j] != 1) {
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throw new RuntimeException("Test2 failed at iteration " + i + ": iArr[" + j + "] = " + iArr[j] + ", lArr[" + j + "] = " + lArr[j]);
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}
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}
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}
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}
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}
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}
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