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