1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package libcore.libcore.io; 19 20 import dalvik.system.VMRuntime; 21 import java.util.Arrays; 22 import junit.framework.TestCase; 23 24 import libcore.io.Memory; 25 import libcore.io.SizeOf; 26 27 public class MemoryTest extends TestCase { 28 public void testSetIntArray() { 29 int[] values = { 3, 7, 31, 127, 8191, 131071, 524287, 2147483647 }; 30 int[] swappedValues = new int[values.length]; 31 for (int i = 0; i < values.length; ++i) { 32 swappedValues[i] = Integer.reverseBytes(values[i]); 33 } 34 35 int scale = SizeOf.INT; 36 VMRuntime runtime = VMRuntime.getRuntime(); 37 byte[] array = (byte[]) runtime.newNonMovableArray(byte.class, scale * values.length + 1); 38 long base_ptr = runtime.addressOf(array); 39 40 for (int ptr_offset = 0; ptr_offset < 2; ++ptr_offset) { 41 long ptr = base_ptr + ptr_offset; // To test aligned and unaligned accesses. 42 Arrays.fill(array, (byte) 0); 43 44 // Regular copy. 45 Memory.pokeIntArray(ptr, values, 0, values.length, false); 46 assertIntsEqual(values, ptr, false); 47 assertIntsEqual(swappedValues, ptr, true); 48 49 // Swapped copy. 50 Memory.pokeIntArray(ptr, values, 0, values.length, true); 51 assertIntsEqual(values, ptr, true); 52 assertIntsEqual(swappedValues, ptr, false); 53 54 // Swapped copies of slices (to ensure we test non-zero offsets). 55 for (int i = 0; i < values.length; ++i) { 56 Memory.pokeIntArray(ptr + i * scale, values, i, 1, true); 57 } 58 assertIntsEqual(values, ptr, true); 59 assertIntsEqual(swappedValues, ptr, false); 60 } 61 } 62 63 private void assertIntsEqual(int[] expectedValues, long ptr, boolean swap) { 64 for (int i = 0; i < expectedValues.length; ++i) { 65 assertEquals(expectedValues[i], Memory.peekInt(ptr + SizeOf.INT * i, swap)); 66 } 67 } 68 69 public void testSetLongArray() { 70 long[] values = { 0x1020304050607080L, 0xffeeddccbbaa9988L }; 71 long[] swappedValues = new long[values.length]; 72 for (int i = 0; i < values.length; ++i) { 73 swappedValues[i] = Long.reverseBytes(values[i]); 74 } 75 76 int scale = SizeOf.LONG; 77 VMRuntime runtime = VMRuntime.getRuntime(); 78 byte[] array = (byte[]) runtime.newNonMovableArray(byte.class, scale * values.length + 1); 79 long base_ptr = runtime.addressOf(array); 80 81 for (int ptr_offset = 0; ptr_offset < 2; ++ptr_offset) { 82 long ptr = base_ptr + ptr_offset; // To test aligned and unaligned accesses. 83 Arrays.fill(array, (byte) 0); 84 85 // Regular copy. 86 Memory.pokeLongArray(ptr, values, 0, values.length, false); 87 assertLongsEqual(values, ptr, false); 88 assertLongsEqual(swappedValues, ptr, true); 89 90 // Swapped copy. 91 Memory.pokeLongArray(ptr, values, 0, values.length, true); 92 assertLongsEqual(values, ptr, true); 93 assertLongsEqual(swappedValues, ptr, false); 94 95 // Swapped copies of slices (to ensure we test non-zero offsets). 96 for (int i = 0; i < values.length; ++i) { 97 Memory.pokeLongArray(ptr + i * scale, values, i, 1, true); 98 } 99 assertLongsEqual(values, ptr, true); 100 assertLongsEqual(swappedValues, ptr, false); 101 } 102 } 103 104 private void assertLongsEqual(long[] expectedValues, long ptr, boolean swap) { 105 for (int i = 0; i < expectedValues.length; ++i) { 106 assertEquals(expectedValues[i], Memory.peekLong(ptr + SizeOf.LONG * i, swap)); 107 } 108 } 109 110 public void testSetShortArray() { 111 short[] values = { 0x0001, 0x0020, 0x0300, 0x4000 }; 112 short[] swappedValues = { 0x0100, 0x2000, 0x0003, 0x0040 }; 113 114 int scale = SizeOf.SHORT; 115 VMRuntime runtime = VMRuntime.getRuntime(); 116 byte[] array = (byte[]) runtime.newNonMovableArray(byte.class, scale * values.length + 1); 117 long base_ptr = runtime.addressOf(array); 118 119 for (int ptr_offset = 0; ptr_offset < 2; ++ptr_offset) { 120 long ptr = base_ptr + ptr_offset; // To test aligned and unaligned accesses. 121 Arrays.fill(array, (byte) 0); 122 123 // Regular copy. 124 Memory.pokeShortArray(ptr, values, 0, values.length, false); 125 assertShortsEqual(values, ptr, false); 126 assertShortsEqual(swappedValues, ptr, true); 127 128 // Swapped copy. 129 Memory.pokeShortArray(ptr, values, 0, values.length, true); 130 assertShortsEqual(values, ptr, true); 131 assertShortsEqual(swappedValues, ptr, false); 132 133 // Swapped copies of slices (to ensure we test non-zero offsets). 134 for (int i = 0; i < values.length; ++i) { 135 Memory.pokeShortArray(ptr + i * scale, values, i, 1, true); 136 } 137 assertShortsEqual(values, ptr, true); 138 assertShortsEqual(swappedValues, ptr, false); 139 } 140 } 141 142 private void assertShortsEqual(short[] expectedValues, long ptr, boolean swap) { 143 for (int i = 0; i < expectedValues.length; ++i) { 144 assertEquals(expectedValues[i], Memory.peekShort(ptr + SizeOf.SHORT * i, swap)); 145 } 146 } 147 } 148
