96 lines
3.4 KiB
Java
96 lines
3.4 KiB
Java
/*
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* Copyright (c) 2018, Oracle and/or its affiliates. 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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package compiler.runtime;
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/*
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* @test
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* @summary testing deoptimization on safepoint with floating point values on stack
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* @bug 8202710
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* @run main/othervm -XX:+DeoptimizeALot
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* -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions
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* compiler.runtime.TestFloatsOnStackDeopt
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*/
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public class TestFloatsOnStackDeopt {
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private static final int ARRLEN = 97;
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private static final int ITERS1 = 100;
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private static final int ITERS2 = 40000;
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private static final float VALUE = 15.f;
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public static String dummyString = "long long string";
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static volatile boolean pleaseStop = false;
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static void run_loop_with_safepoint(float[] a0, float b) {
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// Non-counted loop with safepoint.
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for (long l = 0; l < ITERS2; l++) {
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// Counted and vectorized loop.
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for (int i = 0; i < a0.length; i += 1) {
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a0[i] += b;
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}
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}
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}
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static int test() {
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// thread provokes frequent GC - together with +DeoptimizeALot and safepoint it forces executed function deoptimization
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Thread th = new Thread() {
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public void run() {
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while (!pleaseStop) {
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synchronized(this) { try { wait(1); } catch (Exception ex) {} }
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dummyString = new StringBuilder(dummyString).append(dummyString).toString();
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if (dummyString.length() > 1024*1024) { dummyString = "long long string"; }
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}
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}
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};
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th.start();
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int errn = 0;
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for (int j = 0; j < ITERS1; j++) {
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float[] x0 = new float[ARRLEN];
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run_loop_with_safepoint(x0, VALUE);
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for (int i = 0; i < ARRLEN; i++) {
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if (x0[i] != VALUE * ITERS2) {
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System.err.println("(" + j + "): " + "x0[" + i + "] = " + x0[i] + " != " + VALUE * ITERS2);
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errn++;
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}
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x0[i] = 0.f; // Reset
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}
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if (errn > 0) break;
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}
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pleaseStop = true;
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try {
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th.join();
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} catch (InterruptedException e) {
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throw new Error("InterruptedException in main thread ", e);
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}
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return errn;
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}
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public static void main(String args[]) {
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int errn = test();
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System.err.println((errn > 0) ? "FAILED" : "PASSED");
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}
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}
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