| /* |
| * Copyright (c) 2016, 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.api.directives.test; |
| |
| import java.io.IOException; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import org.graalvm.compiler.api.directives.GraalDirectives; |
| import org.graalvm.compiler.core.common.GraalOptions; |
| import org.graalvm.compiler.core.test.GraalCompilerTest; |
| import org.graalvm.compiler.options.OptionValue; |
| import org.graalvm.compiler.options.OptionValue.OverrideScope; |
| |
| import jdk.internal.org.objectweb.asm.Opcodes; |
| import jdk.vm.ci.code.InstalledCode; |
| import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| @SuppressWarnings("try") |
| public class LockInstrumentationTest extends GraalCompilerTest { |
| |
| private TinyInstrumentor instrumentor; |
| |
| public LockInstrumentationTest() { |
| HotSpotResolvedJavaMethod method = (HotSpotResolvedJavaMethod) getResolvedJavaMethod(ClassA.class, "notInlinedMethod"); |
| method.setNotInlineable(); |
| |
| try { |
| instrumentor = new TinyInstrumentor(LockInstrumentationTest.class, "instrumentation"); |
| } catch (IOException e) { |
| Assert.fail("unable to initialize the instrumentor: " + e); |
| } |
| } |
| |
| public static class ClassA { |
| |
| // This method should be marked as not inlineable |
| public void notInlinedMethod() { |
| } |
| |
| } |
| |
| public static final Object lock = new Object(); |
| public static boolean lockAfterCheckPoint; |
| public static boolean checkpoint; |
| |
| private static void resetFlags() { |
| lockAfterCheckPoint = false; |
| checkpoint = false; |
| } |
| |
| static void instrumentation() { |
| GraalDirectives.instrumentationBeginForPredecessor(); |
| lockAfterCheckPoint = checkpoint; |
| GraalDirectives.instrumentationEnd(); |
| } |
| |
| public static void lockSnippet() { |
| synchronized (lock) { |
| checkpoint = true; |
| ClassA a = new ClassA(); |
| a.notInlinedMethod(); |
| } |
| } |
| |
| @Test |
| public void testLock() { |
| try (OverrideScope s = OptionValue.override(GraalOptions.UseGraalInstrumentation, true)) { |
| Class<?> clazz = instrumentor.instrument(LockInstrumentationTest.class, "lockSnippet", Opcodes.MONITORENTER); |
| ResolvedJavaMethod method = getResolvedJavaMethod(clazz, "lockSnippet"); |
| executeExpected(method, null); // ensure the method is fully resolved |
| resetFlags(); |
| // The monitorenter anchors. We expect the instrumentation set the flag before passing |
| // the checkpoint. |
| InstalledCode code = getCode(method); |
| code.executeVarargs(); |
| Assert.assertFalse("expected lock was performed before checkpoint", lockAfterCheckPoint); |
| } catch (Throwable e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| public static void postponeLockSnippet() { |
| ClassA a = new ClassA(); |
| |
| synchronized (a) { |
| checkpoint = true; |
| a.notInlinedMethod(); |
| } |
| |
| } |
| |
| @Test |
| public void testNonEscapeLock() { |
| try (OverrideScope s = OptionValue.override(GraalOptions.UseGraalInstrumentation, true)) { |
| Class<?> clazz = instrumentor.instrument(LockInstrumentationTest.class, "postponeLockSnippet", Opcodes.MONITORENTER); |
| ResolvedJavaMethod method = getResolvedJavaMethod(clazz, "postponeLockSnippet"); |
| executeExpected(method, null); // ensure the method is fully resolved |
| resetFlags(); |
| // The lock in the snippet will be relocated before the invocation to |
| // notInlinedMethod(), i.e., after the checkpoint. We expect the instrumentation follows |
| // and flag will be set to true. |
| InstalledCode code = getCode(method); |
| code.executeVarargs(); |
| Assert.assertTrue("expected lock was performed after checkpoint", lockAfterCheckPoint); |
| } catch (Throwable e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| } |