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 "memory/virtualspace.hpp"
26 #include "oops/oop.inline.hpp"
27 #include "unittest.hpp"
28
29 class ReservedSpaceTest {
30 public:
31
32 static void small_page_write(void* addr, size_t size) {
33 size_t page_size = os::vm_page_size();
34
35 char* end = (char*) addr + size;
36 for (char* p = (char*) addr; p < end; p += page_size) {
37 *p = 1;
38 }
39 }
40
41 static void release_memory_for_test(ReservedSpace rs) {
42 if (rs.special()) {
43 ASSERT_TRUE(os::release_memory_special(rs.base(), rs.size()));
44 } else {
45 ASSERT_TRUE(os::release_memory(rs.base(), rs.size()));
46 }
47 }
48
49 static void test_reserved_size_alignment(size_t size, size_t alignment) {
50 ASSERT_TRUE(is_size_aligned(size, alignment))
51 << "Incorrect input parameters: size " << size
52 << ", alignment " << alignment;
53
54 ReservedSpace rs(size, alignment, UseLargePages, (char *) NULL);
55
56 ASSERT_TRUE(rs.base() != NULL) << "rs.special = " << rs.special();
57 ASSERT_EQ(size, rs.size()) << "rs.special = " << rs.special();
58
59 EXPECT_PRED2(is_ptr_aligned, rs.base(), alignment)
60 << "aligned sizes should always give aligned addresses";
61 EXPECT_PRED2(is_ptr_aligned, (void*) rs.size(), alignment)
62 << "aligned sizes should always give aligned addresses";
63
64 if (rs.special()) {
65 small_page_write(rs.base(), size);
66 }
67
68 release_memory_for_test(rs);
69 }
70
71 static void test_reserved_size(size_t size) {
72 ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity())
73 << "Must be at least AG aligned";
74
75 ReservedSpace rs(size);
76
77 EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
78 EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
79
80 if (rs.special()) {
81 small_page_write(rs.base(), size);
82 }
83
84 release_memory_for_test(rs);
85 }
86
87 static void test_reserved_size_alignment_page_type(size_t size, size_t alignment, bool maybe_large) {
88 if (size < alignment) {
89 // Tests might set -XX:LargePageSizeInBytes=<small pages> and cause unexpected input arguments for this test.
90 ASSERT_EQ((size_t) os::vm_page_size(), os::large_page_size()) << "Test needs further refinement";
91 return;
92 }
93
94 ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity()) << "Must be at least AG aligned";
95 ASSERT_PRED2(is_size_aligned, size, alignment) << "Must be at least AG aligned";
96
97 bool large = maybe_large && UseLargePages && size >= os::large_page_size();
98
99 ReservedSpace rs(size, alignment, large, false);
100
101 EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
102 EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
103
104 if (rs.special()) {
105 small_page_write(rs.base(), size);
106 }
107
108 release_memory_for_test(rs);
109 }
110 };
111
112 TEST_VM(ReservedSpace, size_alignment) {
113 size_t size = 2 * 1024 * 1024;
114 size_t ag = os::vm_allocation_granularity();
115
116 ReservedSpaceTest::test_reserved_size_alignment(size, ag);
117 ReservedSpaceTest::test_reserved_size_alignment(size * 2, ag);
118 ReservedSpaceTest::test_reserved_size_alignment(size * 10, ag);
119 }
120
121 TEST_VM(ReservedSpace, size) {
122
123 size_t size = 2 * 1024 * 1024;
124 size_t ag = os::vm_allocation_granularity();
125
126 ReservedSpaceTest::test_reserved_size(size * 1);
127 ReservedSpaceTest::test_reserved_size(size * 2);
128 ReservedSpaceTest::test_reserved_size(size * 10);
129 ReservedSpaceTest::test_reserved_size(ag);
130 ReservedSpaceTest::test_reserved_size(size - ag);
131 ReservedSpaceTest::test_reserved_size(size);
132 ReservedSpaceTest::test_reserved_size(size + ag);
133 ReservedSpaceTest::test_reserved_size(size * 2);
134 ReservedSpaceTest::test_reserved_size(size * 2 - ag);
135 ReservedSpaceTest::test_reserved_size(size * 2 + ag);
136 ReservedSpaceTest::test_reserved_size(size * 3);
137 ReservedSpaceTest::test_reserved_size(size * 3 - ag);
138 ReservedSpaceTest::test_reserved_size(size * 3 + ag);
139 ReservedSpaceTest::test_reserved_size(size * 10);
140 ReservedSpaceTest::test_reserved_size(size * 10 + size / 2);
141 }
142
143
144 TEST_VM(ReservedSpace, size_alignment_page_type) {
145 size_t ag = os::vm_allocation_granularity();
146
147 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag, ag , false);
148 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 2, ag , false);
149 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 3, ag , false);
150 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 2, ag * 2, false);
151 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 4, ag * 2, false);
152 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 8, ag * 2, false);
153 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 4, ag * 4, false);
154 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 8, ag * 4, false);
155 ReservedSpaceTest::test_reserved_size_alignment_page_type(ag * 16, ag * 4, false);
156
157 if (UseLargePages) {
158 size_t lp = os::large_page_size();
159
160 // Without large pages
161 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp, ag * 4, false);
162 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 2, ag * 4, false);
163 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 4, ag * 4, false);
164 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp, lp , false);
165 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 2, lp , false);
166 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 3, lp , false);
167 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 2, lp * 2, false);
168 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 4, lp * 2, false);
169 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 8, lp * 2, false);
170
171 // With large pages
172 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp, ag * 4 , true);
173 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 2, ag * 4, true);
174 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 4, ag * 4, true);
175 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp, lp , true);
176 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 2, lp , true);
177 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 3, lp , true);
178 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 2, lp * 2, true);
179 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 4, lp * 2, true);
180 ReservedSpaceTest::test_reserved_size_alignment_page_type(lp * 8, lp * 2, true);
181 }
182 }