1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package compiler.runtime; 25 26 /* 27 * @test 28 * @summary testing deoptimization on safepoint with floating point values on stack 29 * @bug 8202710 30 * @run main/othervm -XX:+DeoptimizeALot 31 * -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions 32 * compiler.runtime.TestFloatsOnStackDeopt 33 */ 34 35 public class TestFloatsOnStackDeopt { 36 37 private static final int ARRLEN = 97; 38 private static final int ITERS1 = 100; 39 private static final int ITERS2 = 40000; 40 private static final float VALUE = 15.f; 41 public static String dummyString = "long long string"; 42 43 static void run_loop_with_safepoint(float[] a0, float b) { 44 // Non-counted loop with safepoint. 45 for (long l = 0; l < ITERS2; l++) { 46 // Counted and vectorized loop. 47 for (int i = 0; i < a0.length; i += 1) { 48 a0[i] += b; 49 } 50 } 51 } 52 53 static int test() { 54 // thread provokes frequent GC - together with +DeoptimizeALot and safepoint it forces executed function deoptimization 55 Thread th = new Thread() { 56 public void run() { 57 while(true) { 58 synchronized(this) { try { wait(1); } catch (Exception ex) {} } 59 dummyString += dummyString; 60 if (dummyString.length() > 1024*1024) { dummyString = "long long string"; } 61 } 62 } 63 }; 64 th.start(); 65 66 int errn = 0; 67 for (int j = 0; j < ITERS1; j++) { 68 float[] x0 = new float[ARRLEN]; 69 run_loop_with_safepoint(x0, VALUE); 70 for (int i = 0; i < ARRLEN; i++) { 71 if (x0[i] != VALUE * ITERS2) { 72 System.err.println("(" + j + "): " + "x0[" + i + "] = " + x0[i] + " != " + VALUE * ITERS2); 73 errn++; 74 } 75 x0[i] = 0.f; // Reset 76 } 77 if (errn > 0) break; 78 } 79 80 th.stop(); 81 return errn; 82 } 83 84 public static void main(String args[]) { 85 int errn = test(); 86 System.err.println((errn > 0) ? "FAILED" : "PASSED"); 87 } 88 } 89