1 /*
   2  * Copyright (c) 2018, 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 
  24 
  25 package org.graalvm.compiler.hotspot.jdk9.test;
  26 
  27 import static org.junit.Assume.assumeFalse;
  28 
  29 import jdk.vm.ci.code.InstalledCode;
  30 import jdk.vm.ci.meta.ResolvedJavaMethod;
  31 import org.graalvm.compiler.core.common.CompilationIdentifier;
  32 import org.graalvm.compiler.hotspot.replacements.StringUTF16Substitutions;
  33 import org.graalvm.compiler.nodes.StructuredGraph;
  34 import org.graalvm.compiler.nodes.java.NewArrayNode;
  35 import org.graalvm.compiler.replacements.arraycopy.ArrayCopyCallNode;
  36 import org.graalvm.compiler.replacements.test.MethodSubstitutionTest;
  37 import org.graalvm.compiler.test.AddExports;
  38 import org.junit.Before;
  39 import org.junit.Test;
  40 



  41 /**
  42  * Test substitutions for (innate) methods StringUTF16.toBytes and StringUTF16.getChars provided by
  43  * {@link StringUTF16Substitutions}.
  44  */
  45 @AddExports({"java.base/java.lang"})
  46 public final class StringUTF16ToBytesGetCharsTest extends MethodSubstitutionTest {
  47 
  48     private static final int N = 1000;
  49     private static final int N_OVERFLOW = 10;
  50 
  51     @Before
  52     public void checkAMD64() {
  53         assumeFalse(Java8OrEarlier);
  54     }
  55 
  56     @Test
  57     public void testStringUTF16ToBytes() throws ClassNotFoundException {
  58         Class<?> javaclass = Class.forName("java.lang.StringUTF16");
  59 
  60         ResolvedJavaMethod caller = getResolvedJavaMethod(javaclass, "toBytes", char[].class, int.class, int.class);
  61         StructuredGraph graph = getReplacements().getIntrinsicGraph(caller, CompilationIdentifier.INVALID_COMPILATION_ID, getDebugContext());
  62         assertInGraph(graph, NewArrayNode.class);
  63         assertInGraph(graph, ArrayCopyCallNode.class);
  64 
  65         InstalledCode code = getCode(caller, graph);
  66 
  67         for (int srcOffset = 0; srcOffset < 2; srcOffset++) {
  68             for (int i = 0; i < N; i++) {
  69                 int length = i2sz(i);
  70                 char[] src = fillUTF16Chars(new char[length]);
  71                 int copiedLength = Math.max(0, length - srcOffset);
  72                 int srcDelta = Math.min(srcOffset, copiedLength);
  73                 byte[] dst = (byte[]) invokeSafe(caller, null, src, srcDelta, copiedLength);
  74                 assert dst.length == copiedLength * 2;
  75                 byte[] dst2 = (byte[]) executeVarargsSafe(code, src, srcDelta, copiedLength);
  76                 assertDeepEquals(dst, dst2);
  77             }
  78         }
  79         for (int srcOff = 0; srcOff < N_OVERFLOW; ++srcOff) {
  80             for (int len = 0; len < N_OVERFLOW; ++len) {
  81                 char[] src = fillUTF16Chars(new char[N_OVERFLOW]);
  82                 test(caller, null, src, srcOff, len);
  83             }
  84         }
  85     }
  86 
  87     @Test
  88     public void testStringUTF16getChars() throws ClassNotFoundException {
  89         Class<?> javaclass = Class.forName("java.lang.StringUTF16");
  90 
  91         ResolvedJavaMethod caller = getResolvedJavaMethod(javaclass, "getChars", byte[].class, int.class, int.class, char[].class, int.class);
  92         StructuredGraph graph = getReplacements().getIntrinsicGraph(caller, CompilationIdentifier.INVALID_COMPILATION_ID, getDebugContext());
  93         assertInGraph(graph, ArrayCopyCallNode.class);
  94 
  95         InstalledCode code = getCode(caller, graph);
  96 
  97         for (int dstOffset = 0; dstOffset < 2; dstOffset++) {
  98             for (int srcOffset = 0; srcOffset < 2; srcOffset++) {
  99                 for (int i = 0; i < N; i++) {
 100                     int length = i2sz(i);
 101                     byte[] src = fillUTF16Bytes(new byte[length * 2]);
 102                     char[] dst = new char[length];
 103                     int copiedLength = Math.max(0, length - Math.max(dstOffset, srcOffset));
 104                     int dstDelta = Math.min(dstOffset, copiedLength);
 105                     int srcDelta = Math.min(srcOffset, copiedLength);
 106                     invokeSafe(caller, null, src, srcDelta, srcDelta + copiedLength, dst, dstDelta);
 107                     char[] dst2 = new char[length];
 108                     executeVarargsSafe(code, src, srcDelta, srcDelta + copiedLength, dst2, dstDelta);
 109                     assertDeepEquals(dst, dst2);
 110                 }
 111             }
 112         }
 113         for (int srcOff = 0; srcOff < N_OVERFLOW; ++srcOff) {
 114             for (int dstOff = 0; dstOff < N_OVERFLOW; ++dstOff) {
 115                 for (int len = 0; len < N_OVERFLOW; ++len) {
 116                     byte[] src = fillUTF16Bytes(new byte[N_OVERFLOW]);
 117                     char[] dst = new char[N_OVERFLOW];
 118                     test(caller, null, src, srcOff, len, dst, dstOff);
 119                 }
 120             }
 121         }
 122     }
 123 
 124     private static char[] fillUTF16Chars(char[] v) {
 125         for (int ch = 0, i = 0; i < v.length; i++, ch += 0x101) {
 126             v[i] = (char) ch;
 127         }
 128         return v;
 129     }
 130 
 131     private static byte[] fillUTF16Bytes(byte[] v) {
 132         for (int ch = 1, i = 0; i < v.length; i += 2, ch++) {
 133             v[i] = (byte) (ch - 1);
 134             v[i + 1] = (byte) ch;
 135         }
 136         return v;
 137     }
 138 
 139     private static int i2sz(int i) {
 140         return i * 3;
 141     }
 142 }
--- EOF ---