1/*
2 * Copyright (c) 2011, 2016, 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 */
23package org.graalvm.compiler.hotspot.test;
24
25import static org.hamcrest.CoreMatchers.not;
26import static org.junit.Assert.assertNotNull;
27import static org.junit.Assert.assertNull;
28import static org.junit.Assert.assertThat;
29
30import java.util.Arrays;
31import java.util.List;
32
33import org.junit.Test;
34
35import org.graalvm.compiler.code.CompilationResult;
36import org.graalvm.compiler.core.test.GraalCompilerTest;
37import org.graalvm.compiler.debug.GraalError;
38
39import jdk.vm.ci.code.BytecodeFrame;
40import jdk.vm.ci.code.InstalledCode;
41import jdk.vm.ci.code.StackLockValue;
42import jdk.vm.ci.code.site.Call;
43import jdk.vm.ci.code.site.Infopoint;
44import jdk.vm.ci.meta.ResolvedJavaMethod;
45
46public class HotSpotMonitorValueTest extends GraalCompilerTest {
47
48    @Override
49    protected InstalledCode addMethod(ResolvedJavaMethod method, CompilationResult compResult) {
50        for (Infopoint i : compResult.getInfopoints()) {
51            if (i instanceof Call) {
52                Call call = (Call) i;
53                if (call.target instanceof ResolvedJavaMethod) {
54                    ResolvedJavaMethod target = (ResolvedJavaMethod) call.target;
55                    if (target.equals(lookupObjectWait())) {
56                        BytecodeFrame frame = call.debugInfo.frame();
57                        BytecodeFrame caller = frame.caller();
58                        assertNotNull(caller);
59                        assertNull(caller.caller());
60                        assertDeepEquals(2, frame.numLocks);
61                        assertDeepEquals(2, caller.numLocks);
62                        StackLockValue lock1 = (StackLockValue) frame.getLockValue(0);
63                        StackLockValue lock2 = (StackLockValue) frame.getLockValue(1);
64                        StackLockValue lock3 = (StackLockValue) caller.getLockValue(0);
65                        StackLockValue lock4 = (StackLockValue) caller.getLockValue(1);
66
67                        List<StackLockValue> locks = Arrays.asList(lock1, lock2, lock3, lock4);
68                        for (StackLockValue lock : locks) {
69                            for (StackLockValue other : locks) {
70                                if (other != lock) {
71                                    // Every lock must have a different stack slot
72                                    assertThat(lock.getSlot(), not(other.getSlot()));
73                                }
74                            }
75                        }
76                        assertDeepEquals(lock3.getOwner(), lock4.getOwner());
77                        assertThat(lock1.getOwner(), not(lock2.getOwner()));
78                        return super.addMethod(method, compResult);
79                    }
80                }
81            }
82        }
83        throw new AssertionError("Could not find debug info for call to Object.wait(long)");
84    }
85
86    private ResolvedJavaMethod lookupObjectWait() {
87        try {
88            return getMetaAccess().lookupJavaMethod(Object.class.getDeclaredMethod("wait", long.class));
89        } catch (Exception e) {
90            throw new GraalError("Could not find Object.wait(long): %s", e);
91        }
92    }
93
94    @Test
95    public void test() {
96        test("testSnippet", "a", "b");
97    }
98
99    private static void locks2(Object a, Object b) throws InterruptedException {
100        synchronized (a) {
101            synchronized (b) {
102                a.wait(5);
103            }
104        }
105    }
106
107    public static void testSnippet(Object a, Object b) throws InterruptedException {
108        synchronized (a) {
109            synchronized (a) {
110                locks2(a, b);
111            }
112        }
113    }
114}
115