| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. 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 org.graalvm.compiler.hotspot.test; |
| |
| import org.graalvm.compiler.api.directives.GraalDirectives; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import jdk.vm.ci.meta.ProfilingInfo; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| /** |
| * Test on-stack-replacement with Graal. The test manually triggers a Graal OSR-compilation which is |
| * later invoked when hitting the backedge counter overflow. |
| */ |
| public class GraalOSRTest extends GraalOSRTestBase { |
| |
| @Test |
| public void testOSR01() { |
| try { |
| testOSR(getInitialOptions(), "testReduceLoop"); |
| } catch (Throwable t) { |
| Assert.assertEquals("OSR compilation without OSR entry loop.", t.getMessage()); |
| } |
| } |
| |
| @Test |
| public void testOSR02() { |
| testOSR(getInitialOptions(), "testSequentialLoop"); |
| } |
| |
| @Test |
| public void testOSR03() { |
| testOSR(getInitialOptions(), "testNonReduceLoop"); |
| } |
| |
| static int limit = 10000; |
| |
| public static int sideEffect; |
| |
| public static ReturnValue testReduceLoop() { |
| for (int i = 0; i < limit * limit; i++) { |
| GraalDirectives.blackhole(i); |
| if (GraalDirectives.inCompiledCode()) { |
| return ReturnValue.SUCCESS; |
| } |
| } |
| return ReturnValue.FAILURE; |
| } |
| |
| public static ReturnValue testSequentialLoop() { |
| ReturnValue ret = ReturnValue.FAILURE; |
| for (int i = 1; i < limit * limit; i++) { |
| GraalDirectives.blackhole(i); |
| if (i % 7 == 0) { |
| ret = ReturnValue.SUCCESS; |
| } |
| } |
| GraalDirectives.controlFlowAnchor(); |
| if (sideEffect == 123) { |
| return ReturnValue.SIDE; |
| } |
| for (int i = 1; i < limit * limit; i++) { |
| GraalDirectives.blackhole(i); |
| if (i % 33 == 0) { |
| ret = ReturnValue.SUCCESS; |
| } |
| } |
| GraalDirectives.controlFlowAnchor(); |
| return ret; |
| } |
| |
| public static ReturnValue testNonReduceLoop() { |
| ReturnValue ret = ReturnValue.FAILURE; |
| for (int i = 0; i < limit * limit; i++) { |
| GraalDirectives.blackhole(i); |
| if (i % 33 == 0) { |
| ret = ReturnValue.SUCCESS; |
| } |
| } |
| GraalDirectives.controlFlowAnchor(); |
| return ret; |
| } |
| |
| @Test |
| public void testOSR04() { |
| testFunnyOSR("testDoWhile", GraalOSRTest::testDoWhile); |
| } |
| |
| @Test |
| public void testOSR05() { |
| testFunnyOSR("testDoWhileLocked", GraalOSRTest::testDoWhileLocked); |
| } |
| |
| /** |
| * Because of a bug in C1 profile collection HotSpot can sometimes request an OSR compilation |
| * for a backedge which isn't ever taken. This test synthetically creates that situation. |
| */ |
| private void testFunnyOSR(String name, Runnable warmup) { |
| ResolvedJavaMethod method = getResolvedJavaMethod(name); |
| int iterations = 0; |
| while (true) { |
| ProfilingInfo profilingInfo = method.getProfilingInfo(); |
| if (profilingInfo.isMature()) { |
| break; |
| } |
| |
| warmup.run(); |
| if (iterations++ % 1000 == 0) { |
| System.err.print('.'); |
| } |
| if (iterations > 200000) { |
| throw new AssertionError("no profile"); |
| } |
| } |
| compileOSR(getInitialOptions(), method); |
| Result result = executeExpected(method, null); |
| checkResult(result); |
| } |
| |
| private static boolean repeatLoop; |
| |
| public static ReturnValue testDoWhile() { |
| do { |
| sideEffect++; |
| } while (repeatLoop); |
| return ReturnValue.SUCCESS; |
| } |
| |
| public static synchronized ReturnValue testDoWhileLocked() { |
| // synchronized (GraalOSRTest.class) { |
| do { |
| sideEffect++; |
| } while (repeatLoop); |
| // } |
| return ReturnValue.SUCCESS; |
| } |
| } |