1 /*
2 * Copyright (c) 2018, 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 "runtime/os.hpp"
27 #include "oops/oop.hpp"
28 #include "utilities/align.hpp"
29 #include "unittest.hpp"
30
31 namespace {
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 // have to use these functions, as gtest's _PRED macros don't like is_aligned
50 // nor (is_aligned<size_t, size_t>)
51 static bool is_size_alignment(size_t size, size_t alignment) {
52 return is_aligned(size, alignment);
53 }
54 static bool is_ptr_alignment(void* ptr, size_t alignment) {
55 return is_aligned(ptr, alignment);
56 }
57
58 static void test_reserved_size(size_t size) {
59 ASSERT_PRED2(is_size_alignment, size, os::vm_allocation_granularity());
60
61 ReservedSpace rs(size);
62
63 EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
64 EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
65
66 if (rs.special()) {
67 small_page_write(rs.base(), size);
68 }
69
70 release_memory_for_test(rs);
71 }
72
73 static void test_reserved_size_alignment(size_t size, size_t alignment) {
74 ASSERT_PRED2(is_size_alignment, size, alignment) << "Incorrect input parameters";
75
76 ReservedSpace rs(size, alignment, UseLargePages, (char *) NULL);
77
78 ASSERT_TRUE(rs.base() != NULL) << "rs.special = " << rs.special();
79 ASSERT_EQ(size, rs.size()) << "rs.special = " << rs.special();
80
81 EXPECT_PRED2(is_ptr_alignment, rs.base(), alignment)
82 << "aligned sizes should always give aligned addresses";
83 EXPECT_PRED2(is_ptr_alignment, (void*) rs.size(), alignment)
84 << "aligned sizes should always give aligned addresses";
85
86 if (rs.special()) {
87 small_page_write(rs.base(), size);
88 }
89
90 release_memory_for_test(rs);
91 }
92
93 static void test_reserved_size_alignment_page_type(size_t size, size_t alignment, bool maybe_large) {
94 if (size < alignment) {
95 // Tests might set -XX:LargePageSizeInBytes=<small pages> and cause unexpected input arguments for this test.
96 ASSERT_EQ((size_t) os::vm_page_size(), os::large_page_size()) << "Test needs further refinement";
97 return;
98 }
99
100 ASSERT_PRED2(is_size_alignment, size, os::vm_allocation_granularity()) << "Must be at least AG aligned";
101 ASSERT_PRED2(is_size_alignment, size, alignment) << "Must be at least AG aligned";
102
103 bool large = maybe_large && UseLargePages && size >= os::large_page_size();
104
105 ReservedSpace rs(size, alignment, large, false);
106
107 EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
108 EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
109
110 if (rs.special()) {
111 small_page_write(rs.base(), size);
112 }
113
114 release_memory_for_test(rs);
115 }
116 }
117
118 TEST_VM(ReservedSpace, size_alignment) {
119 size_t size = 2 * 1024 * 1024;
120 size_t ag = os::vm_allocation_granularity();
121
122 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size, ag));
123 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 2, ag));
124 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 10, ag));
125 }
126
127 TEST_VM(ReservedSpace, size) {
128 size_t size = 2 * 1024 * 1024;
129 size_t ag = os::vm_allocation_granularity();
130
131 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 1));
132 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
133 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
134 EXPECT_NO_FATAL_FAILURE(test_reserved_size(ag));
135 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size - ag));
136 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size));
137 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size + ag));
138 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
139 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 - ag));
140 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 + ag));
141 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3));
142 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 - ag));
143 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 + ag));
144 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
145 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10 + size / 2));
146 }
147
148
149 TEST_VM(ReservedSpace, size_alignment_page_type) {
150 size_t ag = os::vm_allocation_granularity();
151
152 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag, ag , false));
153 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag , false));
154 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 3, ag , false));
155 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag * 2, false));
156 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 2, false));
157 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 2, false));
158 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 4, false));
159 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 4, false));
160 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 16, ag * 4, false));
161
162 if (UseLargePages) {
163 size_t lp = os::large_page_size();
164
165 // Without large pages
166 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4, false));
167 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, false));
168 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, false));
169 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , false));
170 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , false));
171 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , false));
172 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, false));
173 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, false));
174 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, false));
175
176 // With large pages
177 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4 , true));
178 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, true));
179 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, true));
180 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , true));
181 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , true));
182 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , true));
183 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, true));
184 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, true));
185 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, true));
186 }
187 }