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
|
/*
* Copyright (c) 2021, 2023, 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
* @enablePreview
* @requires jdk.foreign.linker != "UNSUPPORTED"
* @run testng/othervm
* --enable-native-access=ALL-UNNAMED
* TestNULLAddress
*/
import org.testng.annotations.Test;
import java.lang.foreign.Linker;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.SymbolLookup;
import java.lang.foreign.ValueLayout;
import java.lang.invoke.MethodHandle;
import static org.testng.Assert.*;
public class TestNULLAddress {
static {
System.loadLibrary("Null");
}
static final Linker LINKER = Linker.nativeLinker();
@Test(expectedExceptions = IllegalArgumentException.class)
public void testNULLLinking() {
LINKER.downcallHandle(
MemorySegment.NULL,
FunctionDescriptor.ofVoid());
}
@Test(expectedExceptions = IllegalArgumentException.class)
public void testNULLVirtual() throws Throwable {
MethodHandle mh = LINKER.downcallHandle(
FunctionDescriptor.ofVoid());
mh.invokeExact(MemorySegment.NULL);
}
@Test
public void testNULLReturn_target() throws Throwable {
MethodHandle mh = LINKER.downcallHandle(SymbolLookup.loaderLookup().find("get_null").get(),
FunctionDescriptor.of(ValueLayout.ADDRESS.withTargetLayout(ValueLayout.JAVA_INT)));
MemorySegment ret = (MemorySegment)mh.invokeExact();
assertTrue(ret.equals(MemorySegment.NULL));
}
@Test
public void testNULLReturn_plain() throws Throwable {
MethodHandle mh = LINKER.downcallHandle(SymbolLookup.loaderLookup().find("get_null").get(),
FunctionDescriptor.of(ValueLayout.ADDRESS));
MemorySegment ret = (MemorySegment)mh.invokeExact();
assertTrue(ret.equals(MemorySegment.NULL));
}
}
|
