--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.test/src/org/graalvm/compiler/hotspot/test/CRC32SubstitutionsTest.java 2017-02-15 16:59:22.447630271 -0800 @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2007, 2012, 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 java.io.DataInputStream; +import java.io.InputStream; +import java.nio.ByteBuffer; +import java.util.zip.CRC32; + +import org.junit.Test; + +import org.graalvm.compiler.core.test.GraalCompilerTest; + +/** + * Tests compiled call to {@link CRC32#update(int, int)}. + */ +@SuppressWarnings("javadoc") +public class CRC32SubstitutionsTest extends GraalCompilerTest { + + public static long update(byte[] input) { + CRC32 crc = new CRC32(); + for (byte b : input) { + crc.update(b); + } + return crc.getValue(); + } + + @Test + public void test1() { + test("update", "some string".getBytes()); + } + + public static long updateBytes(byte[] input, int offset, int length) { + CRC32 crc = new CRC32(); + crc.update(input, offset, length); + return crc.getValue(); + } + + @Test + public void test2() { + byte[] buf = "some string".getBytes(); + int off = 0; + int len = buf.length; + test("updateBytes", buf, off, len); + } + + @Test + public void test3() throws Throwable { + String classfileName = CRC32SubstitutionsTest.class.getSimpleName().replace('.', '/') + ".class"; + InputStream s = CRC32SubstitutionsTest.class.getResourceAsStream(classfileName); + byte[] buf = new byte[s.available()]; + new DataInputStream(s).readFully(buf); + test("updateBytes", buf, 0, buf.length); + for (int offset = 1; offset < buf.length; offset++) { + test("updateBytes", buf, offset, buf.length - offset); + } + } + + public static long updateByteBuffer(ByteBuffer buffer) { + CRC32 crc = new CRC32(); + buffer.rewind(); + crc.update(buffer); + return crc.getValue(); + } + + @Test + public void test4() throws Throwable { + String classfileName = CRC32SubstitutionsTest.class.getSimpleName().replace('.', '/') + ".class"; + InputStream s = CRC32SubstitutionsTest.class.getResourceAsStream(classfileName); + byte[] buf = new byte[s.available()]; + new DataInputStream(s).readFully(buf); + + ByteBuffer directBuf = ByteBuffer.allocateDirect(buf.length); + directBuf.put(buf); + ByteBuffer heapBuf = ByteBuffer.wrap(buf); + + test("updateByteBuffer", directBuf); + test("updateByteBuffer", heapBuf); + } + +}