1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @summary unit tests for java.lang.invoke.MethodHandles
* @library /lib/testlibrary /java/lang/invoke/common
* @compile MethodHandlesTest.java MethodHandlesAsCollectorTest.java remote/RemoteExample.java
* @run junit/othervm/timeout=2500 -XX:+IgnoreUnrecognizedVMOptions
* -XX:-VerifyDependencies
* -esa
* test.java.lang.invoke.MethodHandlesAsCollectorTest
*/
package test.java.lang.invoke;
import org.junit.*;
import test.java.lang.invoke.lib.CodeCacheOverflowProcessor;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodType;
import java.util.Arrays;
import static org.junit.Assert.*;
public class MethodHandlesAsCollectorTest extends MethodHandlesTest {
@Test // SLOW
public void testAsCollector() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testAsCollector0);
CodeCacheOverflowProcessor.runMHTest(this::testAsCollector1);
}
public void testAsCollector0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("asCollector");
for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
if (verbosity >= 3)
System.out.println("asCollector "+argType);
for (int nargs = 0; nargs < 50; nargs++) {
if (CAN_TEST_LIGHTLY && nargs > 11) break;
for (int pos = 0; pos <= nargs; pos++) {
if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
continue;
testAsCollector(argType, pos, nargs);
}
}
}
}
public void testAsCollector(Class<?> argType, int pos, int nargs) throws Throwable {
countTest();
// fake up a MH with the same type as the desired adapter:
MethodHandle fake = varargsArray(nargs);
fake = changeArgTypes(fake, argType);
MethodType newType = fake.type();
Object[] args = randomArgs(newType.parameterArray());
// here is what should happen:
Object[] collectedArgs = Arrays.copyOfRange(args, 0, pos+1);
collectedArgs[pos] = Arrays.copyOfRange(args, pos, args.length);
// here is the MH which will witness the collected argument tail:
MethodHandle target = varargsArray(pos+1);
target = changeArgTypes(target, 0, pos, argType);
target = changeArgTypes(target, pos, pos+1, Object[].class);
if (verbosity >= 3)
System.out.println("collect from "+Arrays.asList(args)+" ["+pos+".."+nargs+"]");
MethodHandle result = target.asCollector(Object[].class, nargs-pos).asType(newType);
Object[] returnValue = (Object[]) result.invokeWithArguments(args);
assertArrayEquals(collectedArgs, returnValue);
}
public void testAsCollector1() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("asCollector/pos");
for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
if (verbosity >= 3)
System.out.println("asCollector/pos "+argType);
for (int nargs = 0; nargs < 50; nargs++) {
if (CAN_TEST_LIGHTLY && nargs > 11) break;
for (int pos = 0; pos <= nargs; pos++) {
if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
continue;
for (int coll = 1; coll < nargs - pos; ++coll) {
if (coll > 4 && coll != 7 && coll != 11 && coll != 20 && coll < nargs - pos - 4) continue;
testAsCollector(argType, pos, coll, nargs);
}
}
}
}
}
public void testAsCollector(Class<?> argType, int pos, int collect, int nargs) throws Throwable {
countTest();
// fake up a MH with the same type as the desired adapter:
MethodHandle fake = varargsArray(nargs);
fake = changeArgTypes(fake, argType);
MethodType newType = fake.type();
Object[] args = randomArgs(newType.parameterArray());
// here is what should happen:
// new arg list has "collect" less arguments, but one extra for collected arguments array
int collectedLength = nargs-(collect-1);
Object[] collectedArgs = new Object[collectedLength];
System.arraycopy(args, 0, collectedArgs, 0, pos);
collectedArgs[pos] = Arrays.copyOfRange(args, pos, pos+collect);
System.arraycopy(args, pos+collect, collectedArgs, pos+1, args.length-(pos+collect));
// here is the MH which will witness the collected argument part (not tail!):
MethodHandle target = varargsArray(collectedLength);
target = changeArgTypes(target, 0, pos, argType);
target = changeArgTypes(target, pos, pos+1, Object[].class);
target = changeArgTypes(target, pos+1, collectedLength, argType);
if (verbosity >= 3)
System.out.println("collect "+collect+" from "+Arrays.asList(args)+" ["+pos+".."+(pos+collect)+"[");
MethodHandle result = target.asCollector(pos, Object[].class, collect).asType(newType);
Object[] returnValue = (Object[]) result.invokeWithArguments(args);
assertArrayEquals(collectedArgs, returnValue);
}
}
|
