1 /*
 2  * Copyright (c) 2021, 2022, Red Hat, Inc. 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  * @bug 8259937
27  * @summary guarantee(loc != NULL) failed: missing saved register with native invoke
28  *
29  * @requires vm.flavor == "server"
30  * @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64" | os.arch == "ppc64le"
31  * @requires vm.gc.Shenandoah
32  *
33  * @run main/othervm --enable-native-access=ALL-UNNAMED -XX:+UnlockDiagnosticVMOptions
34  *                   -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive TestLinkToNativeRBP
35  *
36  */
37 
38 import java.lang.foreign.Linker;
39 import java.lang.foreign.FunctionDescriptor;
40 
41 import java.lang.foreign.SymbolLookup;
42 import java.lang.foreign.ValueLayout;
43 import java.lang.invoke.MethodHandle;
44 
45 public class TestLinkToNativeRBP {
46     static {
47         System.loadLibrary("LinkToNativeRBP");
48     }
49 
50     final static Linker abi = Linker.nativeLinker();
51     static final SymbolLookup lookup = SymbolLookup.loaderLookup();
52     final static MethodHandle foo = abi.downcallHandle(lookup.find("foo").get(),
53             FunctionDescriptor.of(ValueLayout.JAVA_INT));
54 
55     static int foo() throws Throwable {
56         return (int)foo.invokeExact();
57     }
58     public static void main(String[] args) throws Throwable {
59         for (int i = 0; i < 20_000; i++) {
60             test(5);
61         }
62         for (int i = 0; i < 100; i++) {
63             test(1_000_000);
64         }
65     }
66 
67     static volatile Integer field = 0;
68 
69     private static int test(int stop) throws Throwable {
70         int res = 0;
71         for (int i = 0; i < stop; i++) {
72             Integer v = field;
73             res = foo() + v.intValue();
74         }
75         return res;
76     }
77 
78 }