1/*
2 * Copyright (c) 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 */
23
24#include "precompiled.hpp"
25#include "gc/z/zBitMap.inline.hpp"
26#include "unittest.hpp"
27
28class ZBitMapTest : public ::testing::Test {
29protected:
30 static void test_set_pair_unset(size_t size, bool finalizable) {
31 ZBitMap bitmap(size);
32
33 for (BitMap::idx_t i = 0; i < size - 1; i++) {
34 if ((i + 1) % BitsPerWord == 0) {
35 // Can't set pairs of bits in different words.
36 continue;
37 }
38
39 // ZBitMaps are not cleared when constructed.
40 bitmap.clear();
41
42 bool inc_live = false;
43
44 bool ret = bitmap.par_set_bit_pair(i, finalizable, inc_live);
45 EXPECT_TRUE(ret) << "Failed to set bit";
46 EXPECT_TRUE(inc_live) << "Should have set inc_live";
47
48 // First bit should always be set
49 EXPECT_TRUE(bitmap.at(i)) << "Should be set";
50
51 // Second bit should only be set when marking strong
52 EXPECT_NE(bitmap.at(i + 1), finalizable);
53 }
54 }
55
56 static void test_set_pair_set(size_t size, bool finalizable) {
57 ZBitMap bitmap(size);
58
59 for (BitMap::idx_t i = 0; i < size - 1; i++) {
60 if ((i + 1) % BitsPerWord == 0) {
61 // Can't set pairs of bits in different words.
62 continue;
63 }
64
65 // Fill the bitmap with ones.
66 bitmap.set_range(0, size);
67
68 bool inc_live = false;
69
70 bool ret = bitmap.par_set_bit_pair(i, finalizable, inc_live);
71 EXPECT_FALSE(ret) << "Should not succeed setting bit";
72 EXPECT_FALSE(inc_live) << "Should not have set inc_live";
73
74 // Both bits were pre-set.
75 EXPECT_TRUE(bitmap.at(i)) << "Should be set";
76 EXPECT_TRUE(bitmap.at(i + 1)) << "Should be set";
77 }
78 }
79
80 static void test_set_pair_set(bool finalizable) {
81 test_set_pair_set(2, finalizable);
82 test_set_pair_set(62, finalizable);
83 test_set_pair_set(64, finalizable);
84 test_set_pair_set(66, finalizable);
85 test_set_pair_set(126, finalizable);
86 test_set_pair_set(128, finalizable);
87 }
88
89 static void test_set_pair_unset(bool finalizable) {
90 test_set_pair_unset(2, finalizable);
91 test_set_pair_unset(62, finalizable);
92 test_set_pair_unset(64, finalizable);
93 test_set_pair_unset(66, finalizable);
94 test_set_pair_unset(126, finalizable);
95 test_set_pair_unset(128, finalizable);
96 }
97
98};
99
100TEST_F(ZBitMapTest, test_set_pair_set) {
101 test_set_pair_set(false);
102 test_set_pair_set(true);
103}
104
105TEST_F(ZBitMapTest, test_set_pair_unset) {
106 test_set_pair_unset(false);
107 test_set_pair_unset(true);
108}
109