1 /* 2 * Copyright (c) 2014, 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 24 import sun.invoke.util.Wrapper; 25 import test.java.lang.invoke.lib.CodeCacheOverflowProcessor; 26 27 import java.lang.invoke.MethodHandle; 28 import java.lang.invoke.MethodHandleHelper; 29 import java.lang.invoke.MethodType; 30 import java.util.Arrays; 31 import java.util.Collections; 32 33 /* @test 34 * @summary unit tests for varargs array methods: MethodHandleInfo.varargsArray(int), 35 * MethodHandleInfo.varargsArray(Class,int) & MethodHandleInfo.varargsList(int) 36 * @modules java.base/sun.invoke.util 37 * @library /lib/testlibrary /java/lang/invoke/common 38 * @compile/module=java.base java/lang/invoke/MethodHandleHelper.java 39 * @run main/bootclasspath VarargsArrayTest 40 * @run main/bootclasspath/othervm -DVarargsArrayTest.MAX_ARITY=255 -DVarargsArrayTest.START_ARITY=250 41 * VarargsArrayTest 42 */ 43 44 /* This might take a while and burn lots of metadata: 45 * @run main/bootclasspath -DVarargsArrayTest.MAX_ARITY=255 -DVarargsArrayTest.EXHAUSTIVE=true VarargsArrayTest 46 */ 47 public class VarargsArrayTest { 48 private static final Class<?> CLASS = VarargsArrayTest.class; 49 private static final int MAX_ARITY = Integer.getInteger( 50 CLASS.getSimpleName()+".MAX_ARITY", 40); 51 private static final int START_ARITY = Integer.getInteger( 52 CLASS.getSimpleName()+".START_ARITY", 0); 53 private static final boolean EXHAUSTIVE = Boolean.getBoolean( 54 CLASS.getSimpleName()+".EXHAUSTIVE"); 55 56 public static void main(String[] args) throws Throwable { 57 CodeCacheOverflowProcessor.runMHTest(VarargsArrayTest::test); 58 } 59 60 public static void test() throws Throwable { 61 testVarargsArray(); 62 testVarargsReferenceArray(); 63 testVarargsPrimitiveArray(); 64 } 65 66 public static void testVarargsArray() throws Throwable { 67 final int MIN = START_ARITY; 68 final int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added 69 for (int nargs = MIN; nargs <= MAX; nargs = nextArgCount(nargs, 17, MAX)) { 70 MethodHandle target = MethodHandleHelper.varargsArray(nargs); 71 Object[] args = new Object[nargs]; 72 for (int i = 0; i < nargs; i++) 73 args[i] = "#"+i; 74 Object res = target.invokeWithArguments(args); 75 assertArrayEquals(args, (Object[])res); 76 } 77 } 78 79 public static void testVarargsReferenceArray() throws Throwable { 80 testTypedVarargsArray(Object[].class); 81 testTypedVarargsArray(String[].class); 82 testTypedVarargsArray(Number[].class); 83 } 84 85 public static void testVarargsPrimitiveArray() throws Throwable { 86 testTypedVarargsArray(int[].class); 87 testTypedVarargsArray(long[].class); 88 testTypedVarargsArray(byte[].class); 89 testTypedVarargsArray(boolean[].class); 90 testTypedVarargsArray(short[].class); 91 testTypedVarargsArray(char[].class); 92 testTypedVarargsArray(float[].class); 93 testTypedVarargsArray(double[].class); 94 } 95 96 private static int nextArgCount(int nargs, int density, int MAX) { 97 if (EXHAUSTIVE) return nargs + 1; 98 if (nargs >= MAX) return Integer.MAX_VALUE; 99 int BOT = 20, TOP = MAX-5; 100 if (density < 10) { BOT = 10; MAX = TOP-2; } 101 if (nargs <= BOT || nargs >= TOP) { 102 ++nargs; 103 } else { 104 int bump = Math.max(1, 100 / density); 105 nargs += bump; 106 if (nargs > TOP) nargs = TOP; 107 } 108 return nargs; 109 } 110 111 private static void testTypedVarargsArray(Class<?> arrayType) throws Throwable { 112 Class<?> elemType = arrayType.getComponentType(); 113 int MIN = START_ARITY; 114 int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added 115 int density = 3; 116 if (elemType == int.class || elemType == long.class) density = 7; 117 if (elemType == long.class || elemType == double.class) { MAX /= 2; MIN /= 2; } 118 for (int nargs = MIN; nargs <= MAX; nargs = nextArgCount(nargs, density, MAX)) { 119 Object[] args = makeTestArray(elemType, nargs); 120 MethodHandle varargsArray = MethodHandleHelper.varargsArray(arrayType, nargs); 121 MethodType vaType = varargsArray.type(); 122 assertEquals(arrayType, vaType.returnType()); 123 if (nargs != 0) { 124 assertEquals(elemType, vaType.parameterType(0)); 125 assertEquals(elemType, vaType.parameterType(vaType.parameterCount()-1)); 126 } 127 assertEquals(MethodType.methodType(arrayType, Collections.<Class<?>>nCopies(nargs, elemType)), 128 vaType); 129 Object res = varargsArray.invokeWithArguments(args); 130 assertEquals(res.getClass(), arrayType); 131 String resString = toArrayString(res); 132 assertEquals(Arrays.toString(args), resString); 133 134 MethodHandle spreader = varargsArray.asSpreader(arrayType, nargs); 135 MethodType stype = spreader.type(); 136 assert(stype == MethodType.methodType(arrayType, arrayType)); 137 if (nargs <= 5) { 138 // invoke target as a spreader also: 139 @SuppressWarnings("cast") 140 Object res2 = spreader.invokeWithArguments((Object)res); 141 String res2String = toArrayString(res2); 142 assertEquals(Arrays.toString(args), res2String); 143 // invoke the spreader on a generic Object[] array; check for error 144 try { 145 Object res3 = spreader.invokeWithArguments((Object)args); 146 String res3String = toArrayString(res3); 147 assertTrue(arrayType.getName(), arrayType.isAssignableFrom(Object[].class)); 148 assertEquals(Arrays.toString(args), res3String); 149 } catch (ClassCastException ex) { 150 assertFalse(arrayType.getName(), arrayType.isAssignableFrom(Object[].class)); 151 } 152 } 153 if (nargs == 0) { 154 // invoke spreader on null arglist 155 Object res3 = spreader.invokeWithArguments((Object)null); 156 String res3String = toArrayString(res3); 157 assertEquals(Arrays.toString(args), res3String); 158 } 159 } 160 } 161 162 private static Object[] makeTestArray(Class<?> elemType, int len) { 163 Wrapper elem = null; 164 if (elemType.isPrimitive()) 165 elem = Wrapper.forPrimitiveType(elemType); 166 else if (Wrapper.isWrapperType(elemType)) 167 elem = Wrapper.forWrapperType(elemType); 168 Object[] args = new Object[len]; 169 for (int i = 0; i < len; i++) { 170 Object arg = i * 100; 171 if (elem == null) { 172 if (elemType == String.class) 173 arg = "#"+arg; 174 arg = elemType.cast(arg); // just to make sure 175 } else { 176 switch (elem) { 177 case BOOLEAN: arg = (i % 3 == 0); break; 178 case CHAR: arg = 'a' + i; break; 179 case LONG: arg = (long)i * 1000_000_000; break; 180 case FLOAT: arg = (float)i / 100; break; 181 case DOUBLE: arg = (double)i / 1000_000; break; 182 } 183 arg = elem.cast(arg, elemType); 184 } 185 args[i] = arg; 186 } 187 return args; 188 } 189 190 private static String toArrayString(Object a) { 191 if (a == null) return "null"; 192 Class<?> elemType = a.getClass().getComponentType(); 193 if (elemType == null) return a.toString(); 194 if (elemType.isPrimitive()) { 195 switch (Wrapper.forPrimitiveType(elemType)) { 196 case INT: return Arrays.toString((int[])a); 197 case BYTE: return Arrays.toString((byte[])a); 198 case BOOLEAN: return Arrays.toString((boolean[])a); 199 case SHORT: return Arrays.toString((short[])a); 200 case CHAR: return Arrays.toString((char[])a); 201 case FLOAT: return Arrays.toString((float[])a); 202 case LONG: return Arrays.toString((long[])a); 203 case DOUBLE: return Arrays.toString((double[])a); 204 } 205 } 206 return Arrays.toString((Object[])a); 207 } 208 209 public static void assertArrayEquals(Object[] arr1, Object[] arr2) { 210 if (arr1 == null && arr2 == null) return; 211 if (arr1 != null && arr2 != null && arr1.length == arr2.length) { 212 for (int i = 0; i < arr1.length; i++) { 213 assertEquals(arr1[i], arr2[i]); 214 } 215 return; 216 } 217 throw new AssertionError(Arrays.deepToString(arr1) 218 + " != " + Arrays.deepToString(arr2)); 219 } 220 221 public static void assertEquals(Object o1, Object o2) { 222 if (o1 == null && o2 == null) return; 223 if (o1 != null && o1.equals(o2)) return; 224 throw new AssertionError(o1 + " != " + o2); 225 } 226 227 public static void assertTrue(String msg, boolean b) { 228 if (!b) { 229 throw new AssertionError(msg); 230 } 231 } 232 233 public static void assertFalse(String msg, boolean b) { 234 assertTrue(msg, !b); 235 } 236 }