1 /* 2 * Copyright (c) 2017, 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 package org.graalvm.compiler.hotspot.test; 24 25 import org.graalvm.compiler.replacements.test.MethodSubstitutionTest; 26 import org.junit.Test; 27 28 import jdk.vm.ci.code.InstalledCode; 29 import jdk.vm.ci.meta.ResolvedJavaMethod; 30 import sun.misc.Unsafe; 31 32 /** 33 * Tests the VM independent intrinsification of {@link Unsafe} methods. 34 */ 35 public class HotSpotUnsafeSubstitutionTest extends MethodSubstitutionTest { 36 37 public void testSubstitution(String testMethodName, Class<?> holder, String methodName, Class<?>[] parameterTypes, Object receiver, Object[] args1, Object[] args2) { 38 ResolvedJavaMethod testMethod = getResolvedJavaMethod(testMethodName); 39 ResolvedJavaMethod originalMethod = getResolvedJavaMethod(holder, methodName, parameterTypes); 40 41 // Force compilation 42 InstalledCode code = getCode(testMethod); 43 assert code != null; 44 45 // Verify that the original method and the substitution produce the same value 46 Object expected = invokeSafe(originalMethod, receiver, args1); 47 Object actual = invokeSafe(testMethod, null, args2); 48 assertDeepEquals(expected, actual); 49 50 // Verify that the generated code and the original produce the same value 51 expected = invokeSafe(originalMethod, receiver, args1); 52 actual = executeVarargsSafe(code, args2); 53 assertDeepEquals(expected, actual); 54 55 } 56 57 @Test 58 public void testUnsafeSubstitutions() throws Exception { 59 testGraph("unsafeCopyMemory"); 60 } 61 62 public void unsafeCopyMemory(Object srcBase, long srcOffset, Object dstBase, long dstOffset, long bytes) { 63 UNSAFE.copyMemory(srcBase, srcOffset, dstBase, dstOffset, bytes); 64 } 65 66 public byte[] testCopyMemorySnippet(long src, int bytes) { 67 byte[] result = new byte[bytes]; 68 UNSAFE.copyMemory(null, src, result, Unsafe.ARRAY_BYTE_BASE_OFFSET, bytes); 69 return result; 70 } 71 72 @Test 73 public void testCopyMemory() { 74 int size = 128; 75 long src = UNSAFE.allocateMemory(size); 76 for (int i = 0; i < size; i++) { 77 UNSAFE.putByte(null, src + i, (byte) i); 78 } 79 test("testCopyMemorySnippet", src, size); 80 } 81 }