1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "space_bitmap.h"
18
19 #include "common_test.h"
20 #include "globals.h"
21 #include "space_bitmap-inl.h"
22 #include "UniquePtr.h"
23
24 #include <stdint.h>
25
26 namespace art {
27 namespace gc {
28 namespace accounting {
29
30 class SpaceBitmapTest : public CommonTest {
31 public:
32 };
33
TEST_F(SpaceBitmapTest,Init)34 TEST_F(SpaceBitmapTest, Init) {
35 byte* heap_begin = reinterpret_cast<byte*>(0x10000000);
36 size_t heap_capacity = 16 * MB;
37 UniquePtr<SpaceBitmap> space_bitmap(SpaceBitmap::Create("test bitmap",
38 heap_begin, heap_capacity));
39 EXPECT_TRUE(space_bitmap.get() != NULL);
40 }
41
42 class BitmapVerify {
43 public:
BitmapVerify(SpaceBitmap * bitmap,const mirror::Object * begin,const mirror::Object * end)44 BitmapVerify(SpaceBitmap* bitmap, const mirror::Object* begin, const mirror::Object* end)
45 : bitmap_(bitmap),
46 begin_(begin),
47 end_(end) {}
48
operator ()(const mirror::Object * obj)49 void operator()(const mirror::Object* obj) {
50 EXPECT_TRUE(obj >= begin_);
51 EXPECT_TRUE(obj <= end_);
52 EXPECT_EQ(bitmap_->Test(obj), ((reinterpret_cast<uintptr_t>(obj) & 0xF) != 0));
53 }
54
55 SpaceBitmap* bitmap_;
56 const mirror::Object* begin_;
57 const mirror::Object* end_;
58 };
59
TEST_F(SpaceBitmapTest,ScanRange)60 TEST_F(SpaceBitmapTest, ScanRange) {
61 byte* heap_begin = reinterpret_cast<byte*>(0x10000000);
62 size_t heap_capacity = 16 * MB;
63
64 UniquePtr<SpaceBitmap> space_bitmap(SpaceBitmap::Create("test bitmap",
65 heap_begin, heap_capacity));
66 EXPECT_TRUE(space_bitmap.get() != NULL);
67
68 // Set all the odd bits in the first BitsPerWord * 3 to one.
69 for (size_t j = 0; j < kBitsPerWord * 3; ++j) {
70 const mirror::Object* obj =
71 reinterpret_cast<mirror::Object*>(heap_begin + j * SpaceBitmap::kAlignment);
72 if (reinterpret_cast<uintptr_t>(obj) & 0xF) {
73 space_bitmap->Set(obj);
74 }
75 }
76 // Try every possible starting bit in the first word. Then for each starting bit, try each
77 // possible length up to a maximum of kBitsPerWord * 2 - 1 bits.
78 // This handles all the cases, having runs which start and end on the same word, and different
79 // words.
80 for (size_t i = 0; i < static_cast<size_t>(kBitsPerWord); ++i) {
81 mirror::Object* start =
82 reinterpret_cast<mirror::Object*>(heap_begin + i * SpaceBitmap::kAlignment);
83 for (size_t j = 0; j < static_cast<size_t>(kBitsPerWord * 2); ++j) {
84 mirror::Object* end =
85 reinterpret_cast<mirror::Object*>(heap_begin + (i + j) * SpaceBitmap::kAlignment);
86 BitmapVerify(space_bitmap.get(), start, end);
87 }
88 }
89 }
90
91 } // namespace accounting
92 } // namespace gc
93 } // namespace art
94