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