1// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2// for details. All rights reserved. Use of this source code is governed by a
3// BSD-style license that can be found in the LICENSE file.
4
5#include "vm/memory_region.h"
6#include "platform/assert.h"
7#include "vm/unit_test.h"
8
9namespace dart {
10
11static void* NewRegion(uword size) {
12 void* pointer = new uint8_t[size];
13 return pointer;
14}
15
16static void DeleteRegion(const MemoryRegion& region) {
17 delete[] reinterpret_cast<uint8_t*>(region.pointer());
18}
19
20VM_UNIT_TEST_CASE(NullRegion) {
21 static const uword kSize = 512;
22 MemoryRegion region(NULL, kSize);
23 EXPECT(region.pointer() == NULL);
24 EXPECT_EQ(kSize, region.size());
25}
26
27VM_UNIT_TEST_CASE(NewRegion) {
28 static const uword kSize = 1024;
29 MemoryRegion region(NewRegion(kSize), kSize);
30 EXPECT_EQ(kSize, region.size());
31 EXPECT(region.pointer() != NULL);
32
33 region.Store<int32_t>(0, 42);
34 EXPECT_EQ(42, region.Load<int32_t>(0));
35
36 DeleteRegion(region);
37}
38
39VM_UNIT_TEST_CASE(Subregion) {
40 static const uword kSize = 1024;
41 static const uword kSubOffset = 128;
42 static const uword kSubSize = 512;
43 MemoryRegion region(NewRegion(kSize), kSize);
44 MemoryRegion sub_region;
45 sub_region.Subregion(region, kSubOffset, kSubSize);
46 EXPECT_EQ(kSubSize, sub_region.size());
47 EXPECT(sub_region.pointer() != NULL);
48 EXPECT(sub_region.start() == region.start() + kSubOffset);
49
50 region.Store<int32_t>(0, 42);
51 sub_region.Store<int32_t>(0, 100);
52 EXPECT_EQ(42, region.Load<int32_t>(0));
53 EXPECT_EQ(100, region.Load<int32_t>(kSubOffset));
54
55 DeleteRegion(region);
56}
57
58VM_UNIT_TEST_CASE(ExtendedRegion) {
59 static const uword kSize = 1024;
60 static const uword kSubSize = 512;
61 static const uword kExtendSize = 512;
62 MemoryRegion region(NewRegion(kSize), kSize);
63 MemoryRegion sub_region;
64 sub_region.Subregion(region, 0, kSubSize);
65 MemoryRegion extended_region;
66 extended_region.Extend(sub_region, kExtendSize);
67 EXPECT_EQ(kSize, extended_region.size());
68 EXPECT(extended_region.pointer() == region.pointer());
69 EXPECT(extended_region.pointer() == sub_region.pointer());
70
71 extended_region.Store<int32_t>(0, 42);
72 EXPECT_EQ(42, extended_region.Load<int32_t>(0));
73
74 DeleteRegion(region);
75}
76
77} // namespace dart
78