1 /*
 2  * Copyright (c) 2021, 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  * @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64"
27  * @run testng/othervm --enable-native-access=ALL-UNNAMED TestMixedMallocFree
28  */
29 
30 import jdk.incubator.foreign.CLinker;
31 import jdk.incubator.foreign.FunctionDescriptor;
32 import jdk.incubator.foreign.MemoryAccess;
33 import jdk.incubator.foreign.MemoryAddress;
34 import jdk.incubator.foreign.MemorySegment;
35 import jdk.incubator.foreign.ResourceScope;
36 import jdk.incubator.foreign.SymbolLookup;
37 import org.testng.annotations.Test;
38 
39 import java.lang.invoke.MethodHandle;
40 import java.lang.invoke.MethodType;
41 
42 import static jdk.incubator.foreign.CLinker.*;
43 import static org.testng.Assert.assertEquals;
44 
45 public class TestMixedMallocFree {
46 
47     static final MethodHandle MH_my_malloc;
48 
49     static {
50         System.loadLibrary("Malloc");
51         SymbolLookup MALLOC = SymbolLookup.loaderLookup();
52 
53         MH_my_malloc = CLinker.getInstance().downcallHandle(
54             MALLOC.lookup("my_malloc").orElseThrow(),
55             MethodType.methodType(MemoryAddress.class, long.class),
56             FunctionDescriptor.of(C_POINTER, C_LONG_LONG));
57     }
58 
59     @Test
60     public void testMalloc() throws Throwable {
61         MemoryAddress ma = (MemoryAddress) MH_my_malloc.invokeExact(4L);
62         MemorySegment seg = ma.asSegment(4L, ResourceScope.newImplicitScope());
63         MemoryAccess.setInt(seg, 42);
64         assertEquals(MemoryAccess.getInt(seg), 42);
65         // Test if this free crashes the VM, which might be the case if we load the wrong default library
66         // and end up mixing two allocators together.
67         CLinker.freeMemory(ma);
68     }
69 
70 }