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/allocation.hpp"
26#include "memory/metachunk.hpp"
27#include "unittest.hpp"
28#include "utilities/align.hpp"
29#include "utilities/copy.hpp"
30#include "utilities/debug.hpp"
31
32class MetachunkTest {
33 public:
34  static MetaWord* initial_top(Metachunk* metachunk) {
35    return metachunk->initial_top();
36  }
37  static MetaWord* top(Metachunk* metachunk) {
38    return metachunk->top();
39  }
40
41};
42
43TEST(Metachunk, basic) {
44  size_t size = 2 * 1024 * 1024;
45  void* memory = malloc(size);
46  ASSERT_TRUE(NULL != memory) << "Failed to malloc 2MB";
47
48  Metachunk* metachunk = ::new (memory) Metachunk(size / BytesPerWord, NULL);
49
50  EXPECT_EQ((MetaWord*) metachunk, metachunk->bottom());
51  EXPECT_EQ((uintptr_t*) metachunk + metachunk->size(), metachunk->end());
52
53  // Check sizes
54  EXPECT_EQ(metachunk->size(), metachunk->word_size());
55  EXPECT_EQ(pointer_delta(metachunk->end(), metachunk->bottom(),
56                sizeof (MetaWord*)),
57            metachunk->word_size());
58
59  // Check usage
60  EXPECT_EQ(metachunk->used_word_size(), metachunk->overhead());
61  EXPECT_EQ(metachunk->word_size() - metachunk->used_word_size(),
62            metachunk->free_word_size());
63  EXPECT_EQ(MetachunkTest::top(metachunk), MetachunkTest::initial_top(metachunk));
64  EXPECT_TRUE(metachunk->is_empty());
65
66  // Allocate
67  size_t alloc_size = 64; // Words
68  EXPECT_TRUE(is_aligned(alloc_size, Metachunk::object_alignment()));
69
70  MetaWord* mem = metachunk->allocate(alloc_size);
71
72  // Check post alloc
73  EXPECT_EQ(MetachunkTest::initial_top(metachunk), mem);
74  EXPECT_EQ(MetachunkTest::top(metachunk), mem + alloc_size);
75  EXPECT_EQ(metachunk->overhead() + alloc_size, metachunk->used_word_size());
76  EXPECT_EQ(metachunk->word_size() - metachunk->used_word_size(),
77            metachunk->free_word_size());
78  EXPECT_FALSE(metachunk->is_empty());
79
80  // Clear chunk
81  metachunk->reset_empty();
82
83  // Check post clear
84  EXPECT_EQ(metachunk->used_word_size(), metachunk->overhead());
85  EXPECT_EQ(metachunk->word_size() - metachunk->used_word_size(),
86            metachunk->free_word_size());
87  EXPECT_EQ(MetachunkTest::top(metachunk), MetachunkTest::initial_top(metachunk));
88  EXPECT_TRUE(metachunk->is_empty());
89
90  free(memory);
91}
92