1 /*
 2  * Copyright (c) 2017, 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 #include "precompiled.hpp"
25 #include "gc/z/zLiveMap.inline.hpp"
26 #include "unittest.hpp"
27 
28 class ZLiveMapTest : public ::testing::Test {
29 protected:
30   static void strongly_live_for_large_zpage() {
31     // Large ZPages only have room for one object.
32     ZLiveMap livemap(1);
33 
34     bool inc_live;
35     uintptr_t object = 0u;
36 
37     // Mark the object strong.
38     livemap.set_atomic(object, false /* finalizable */, inc_live);
39 
40     // Check that both bits are in the same segment.
41     ASSERT_EQ(livemap.index_to_segment(0), livemap.index_to_segment(1));
42 
43     // Check that the object was marked.
44     ASSERT_TRUE(livemap.get(0));
45 
46     // Check that the object was strongly marked.
47     ASSERT_TRUE(livemap.get(1));
48 
49     ASSERT_TRUE(inc_live);
50   }
51 };
52 
53 TEST_F(ZLiveMapTest, strongly_live_for_large_zpage) {
54   strongly_live_for_large_zpage();
55 }