OLD | NEW |
| (Empty) |
1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include <limits> | |
6 | |
7 #include "mojo/public/cpp/bindings/buffer.h" | |
8 #include "mojo/public/cpp/bindings/lib/bindings_serialization.h" | |
9 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h" | |
10 #include "mojo/public/cpp/bindings/lib/scratch_buffer.h" | |
11 #include "mojo/public/cpp/environment/environment.h" | |
12 #include "testing/gtest/include/gtest/gtest.h" | |
13 | |
14 namespace mojo { | |
15 namespace test { | |
16 namespace { | |
17 | |
18 bool IsZero(void* p_buf, size_t size) { | |
19 char* buf = reinterpret_cast<char*>(p_buf); | |
20 for (size_t i = 0; i < size; ++i) { | |
21 if (buf[i] != 0) | |
22 return false; | |
23 } | |
24 return true; | |
25 } | |
26 | |
27 // Tests small and large allocations in ScratchBuffer. | |
28 TEST(ScratchBufferTest, Basic) { | |
29 Environment env; | |
30 | |
31 // Test that a small allocation is placed on the stack. | |
32 internal::ScratchBuffer buf; | |
33 void* small = buf.Allocate(10); | |
34 EXPECT_TRUE(small >= &buf && small < (&buf + sizeof(buf))); | |
35 EXPECT_TRUE(IsZero(small, 10)); | |
36 | |
37 // Large allocations won't be on the stack. | |
38 void* large = buf.Allocate(100*1024); | |
39 EXPECT_TRUE(IsZero(large, 100*1024)); | |
40 EXPECT_FALSE(large >= &buf && large < (&buf + sizeof(buf))); | |
41 | |
42 // But another small allocation should be back on the stack. | |
43 small = buf.Allocate(10); | |
44 EXPECT_TRUE(IsZero(small, 10)); | |
45 EXPECT_TRUE(small >= &buf && small < (&buf + sizeof(buf))); | |
46 } | |
47 | |
48 // Tests that Buffer::current() returns the correct value. | |
49 TEST(ScratchBufferTest, Stacked) { | |
50 Environment env; | |
51 | |
52 EXPECT_FALSE(Buffer::current()); | |
53 | |
54 { | |
55 internal::ScratchBuffer a; | |
56 EXPECT_EQ(&a, Buffer::current()); | |
57 | |
58 { | |
59 internal::ScratchBuffer b; | |
60 EXPECT_EQ(&b, Buffer::current()); | |
61 } | |
62 } | |
63 | |
64 EXPECT_FALSE(Buffer::current()); | |
65 } | |
66 | |
67 // Tests that FixedBuffer allocates memory aligned to 8 byte boundaries. | |
68 TEST(FixedBufferTest, Alignment) { | |
69 Environment env; | |
70 | |
71 internal::FixedBuffer buf(internal::Align(10) * 2); | |
72 ASSERT_EQ(buf.size(), 16u * 2); | |
73 | |
74 void* a = buf.Allocate(10); | |
75 ASSERT_TRUE(a); | |
76 EXPECT_TRUE(IsZero(a, 10)); | |
77 EXPECT_EQ(0, reinterpret_cast<ptrdiff_t>(a) % 8); | |
78 | |
79 void* b = buf.Allocate(10); | |
80 ASSERT_TRUE(b); | |
81 EXPECT_TRUE(IsZero(b, 10)); | |
82 EXPECT_EQ(0, reinterpret_cast<ptrdiff_t>(b) % 8); | |
83 | |
84 // Any more allocations would result in an assert, but we can't test that. | |
85 } | |
86 | |
87 // Tests that FixedBuffer::Leak passes ownership to the caller. | |
88 TEST(FixedBufferTest, Leak) { | |
89 Environment env; | |
90 | |
91 void* ptr = NULL; | |
92 void* buf_ptr = NULL; | |
93 { | |
94 internal::FixedBuffer buf(8); | |
95 ASSERT_EQ(8u, buf.size()); | |
96 | |
97 ptr = buf.Allocate(8); | |
98 ASSERT_TRUE(ptr); | |
99 void* buf_ptr = buf.Leak(); | |
100 | |
101 // The buffer should point to the first element allocated. | |
102 // TODO(mpcomplete): Is this a reasonable expectation? | |
103 EXPECT_EQ(ptr, buf_ptr); | |
104 | |
105 // The FixedBuffer should be empty now. | |
106 EXPECT_EQ(0u, buf.size()); | |
107 EXPECT_FALSE(buf.Leak()); | |
108 } | |
109 | |
110 // Since we called Leak, ptr is still writable after FixedBuffer went out of | |
111 // scope. | |
112 memset(ptr, 1, 8); | |
113 free(buf_ptr); | |
114 } | |
115 | |
116 #ifdef NDEBUG | |
117 TEST(FixedBufferTest, TooBig) { | |
118 Environment env; | |
119 | |
120 internal::FixedBuffer buf(24); | |
121 | |
122 // A little bit too large. | |
123 EXPECT_EQ(reinterpret_cast<void*>(0), buf.Allocate(32)); | |
124 | |
125 // Move the cursor forward. | |
126 EXPECT_NE(reinterpret_cast<void*>(0), buf.Allocate(16)); | |
127 | |
128 // A lot too large, leading to possible integer overflow. | |
129 EXPECT_EQ(reinterpret_cast<void*>(0), | |
130 buf.Allocate(std::numeric_limits<size_t>::max() - 8u)); | |
131 } | |
132 #endif | |
133 | |
134 } // namespace | |
135 } // namespace test | |
136 } // namespace mojo | |
OLD | NEW |