1 /* 2 * Copyright (c) 2022, Red Hat, Inc. 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 /* 25 * @test 26 * @bug 8284848 27 * @requires vm.compiler2.enabled 28 * @summary Blackhole arguments are globally escaping, thus preventing advanced EA optimizations 29 * @library /test/lib / 30 * @run driver compiler.c2.irTests.blackhole.BlackholeSyncEATest 31 */ 32 33 package compiler.c2.irTests.blackhole; 34 35 import compiler.lib.ir_framework.*; 36 import jdk.test.lib.Asserts; 37 38 public class BlackholeSyncEATest { 39 40 public static void main(String[] args) { 41 TestFramework.runWithFlags( 42 "-XX:+UnlockExperimentalVMOptions", 43 "-XX:CompileCommand=blackhole,compiler.c2.irTests.blackhole.BlackholeSyncEATest::blackhole", 44 "-XX:CompileCommand=dontinline,compiler.c2.irTests.blackhole.BlackholeSyncEATest::dontinline" 45 ); 46 } 47 48 /* 49 * Negative test: check that dontinline method still allows EA to eliminate the synchronization. 50 */ 51 52 @Test 53 @IR(failOn = {IRNode.FAST_LOCK, IRNode.FAST_UNLOCK}) 54 static void testDontline() { 55 Object o = new Object(); 56 synchronized (o) {} 57 dontinline(o); 58 } 59 60 static void dontinline(Object o) {} 61 62 @Run(test = "testDontline") 63 static void runDontinline() { 64 testDontline(); 65 } 66 67 /* 68 * Positive test: check that blackhole keeps the synchronization in. 69 */ 70 71 @Test 72 @IR(counts = {IRNode.FAST_LOCK, "1"}) 73 @IR(counts = {IRNode.FAST_UNLOCK, "1"}) 74 static void testBlackholed() { 75 Object o = new Object(); 76 synchronized (o) {} 77 blackhole(o); 78 } 79 80 static void blackhole(Object o) {} 81 82 @Run(test = "testBlackholed") 83 static void runBlackholed() { 84 testBlackholed(); 85 } 86 87 }