1 /*
 2  * Copyright (c) 2020, 2023, 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 /*
25  * @test
26  * @enablePreview
27  * @requires jdk.foreign.linker != "UNSUPPORTED"
28  * @run testng/othervm --enable-native-access=ALL-UNNAMED TestClassLoaderFindNative
29  */
30 
31 import java.lang.foreign.Arena;
32 import java.lang.foreign.MemorySegment;
33 import java.lang.foreign.SymbolLookup;
34 import java.nio.ByteOrder;
35 import org.testng.annotations.Test;
36 
37 import static java.lang.foreign.ValueLayout.JAVA_INT;
38 import static org.testng.Assert.*;
39 
40 // FYI this test is run on 64-bit platforms only for now,
41 // since the windows 32-bit linker fails and there
42 // is some fallback behaviour to use the 64-bit linker,
43 // where cygwin gets in the way and we accidentally pick up its
44 // link.exe
45 public class TestClassLoaderFindNative {
46     static {
47         System.loadLibrary("LookupTest");
48     }
49 
50     @Test
51     public void testSimpleLookup() {
52         assertFalse(SymbolLookup.loaderLookup().find("f").isEmpty());
53     }
54 
55     @Test
56     public void testInvalidSymbolLookup() {
57         assertTrue(SymbolLookup.loaderLookup().find("nonExistent").isEmpty());
58     }
59 
60     @Test
61     public void testVariableSymbolLookup() {
62         MemorySegment segment = SymbolLookup.loaderLookup().find("c").get().reinterpret(4);
63         assertEquals(segment.get(JAVA_INT, 0), 42);
64     }
65 
66     @Test
67     void testLoadLibraryBadLookupName() {
68         assertTrue(SymbolLookup.loaderLookup().find("f\u0000foobar").isEmpty());
69     }
70 }