1 // Copyright (c) 2012 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 "base/memory/aligned_memory.h"
6
7 #include <memory>
8
9 #include "build/build_config.h"
10 #include "testing/gtest/include/gtest/gtest.h"
11
12 #define EXPECT_ALIGNED(ptr, align) \
13 EXPECT_EQ(0u, reinterpret_cast<uintptr_t>(ptr) & (align - 1))
14
15 namespace {
16
17 using base::AlignedMemory;
18
TEST(AlignedMemoryTest,StaticAlignment)19 TEST(AlignedMemoryTest, StaticAlignment) {
20 static AlignedMemory<8, 8> raw8;
21 static AlignedMemory<8, 16> raw16;
22 static AlignedMemory<8, 256> raw256;
23 static AlignedMemory<8, 4096> raw4096;
24
25 EXPECT_EQ(8u, ALIGNOF(raw8));
26 EXPECT_EQ(16u, ALIGNOF(raw16));
27 EXPECT_EQ(256u, ALIGNOF(raw256));
28 EXPECT_EQ(4096u, ALIGNOF(raw4096));
29
30 EXPECT_ALIGNED(raw8.void_data(), 8);
31 EXPECT_ALIGNED(raw16.void_data(), 16);
32 EXPECT_ALIGNED(raw256.void_data(), 256);
33 EXPECT_ALIGNED(raw4096.void_data(), 4096);
34 }
35
TEST(AlignedMemoryTest,StackAlignment)36 TEST(AlignedMemoryTest, StackAlignment) {
37 AlignedMemory<8, 8> raw8;
38 AlignedMemory<8, 16> raw16;
39 AlignedMemory<8, 128> raw128;
40
41 EXPECT_EQ(8u, ALIGNOF(raw8));
42 EXPECT_EQ(16u, ALIGNOF(raw16));
43 EXPECT_EQ(128u, ALIGNOF(raw128));
44
45 EXPECT_ALIGNED(raw8.void_data(), 8);
46 EXPECT_ALIGNED(raw16.void_data(), 16);
47
48 // TODO(ios): __attribute__((aligned(X))) with X >= 128 does not works on
49 // the stack when building for arm64 on iOS, http://crbug.com/349003
50 #if !(defined(OS_IOS) && defined(ARCH_CPU_ARM64))
51 EXPECT_ALIGNED(raw128.void_data(), 128);
52
53 // NaCl x86-64 compiler emits non-validating instructions for >128
54 // bytes alignment.
55 // http://www.chromium.org/nativeclient/design-documents/nacl-sfi-model-on-x86-64-systems
56 // TODO(hamaji): Ideally, NaCl compiler for x86-64 should workaround
57 // this limitation and this #if should be removed.
58 // https://code.google.com/p/nativeclient/issues/detail?id=3463
59 #if !(defined(OS_NACL) && defined(ARCH_CPU_X86_64))
60 AlignedMemory<8, 256> raw256;
61 EXPECT_EQ(256u, ALIGNOF(raw256));
62 EXPECT_ALIGNED(raw256.void_data(), 256);
63
64 // TODO(ios): This test hits an armv7 bug in clang. crbug.com/138066
65 #if !(defined(OS_IOS) && defined(ARCH_CPU_ARM_FAMILY))
66 AlignedMemory<8, 4096> raw4096;
67 EXPECT_EQ(4096u, ALIGNOF(raw4096));
68 EXPECT_ALIGNED(raw4096.void_data(), 4096);
69 #endif // !(defined(OS_IOS) && defined(ARCH_CPU_ARM_FAMILY))
70 #endif // !(defined(OS_NACL) && defined(ARCH_CPU_X86_64))
71 #endif // !(defined(OS_IOS) && defined(ARCH_CPU_ARM64))
72 }
73
TEST(AlignedMemoryTest,DynamicAllocation)74 TEST(AlignedMemoryTest, DynamicAllocation) {
75 void* p = base::AlignedAlloc(8, 8);
76 EXPECT_TRUE(p);
77 EXPECT_ALIGNED(p, 8);
78 base::AlignedFree(p);
79
80 p = base::AlignedAlloc(8, 16);
81 EXPECT_TRUE(p);
82 EXPECT_ALIGNED(p, 16);
83 base::AlignedFree(p);
84
85 p = base::AlignedAlloc(8, 256);
86 EXPECT_TRUE(p);
87 EXPECT_ALIGNED(p, 256);
88 base::AlignedFree(p);
89
90 p = base::AlignedAlloc(8, 4096);
91 EXPECT_TRUE(p);
92 EXPECT_ALIGNED(p, 4096);
93 base::AlignedFree(p);
94 }
95
TEST(AlignedMemoryTest,ScopedDynamicAllocation)96 TEST(AlignedMemoryTest, ScopedDynamicAllocation) {
97 std::unique_ptr<float, base::AlignedFreeDeleter> p(
98 static_cast<float*>(base::AlignedAlloc(8, 8)));
99 EXPECT_TRUE(p.get());
100 EXPECT_ALIGNED(p.get(), 8);
101 }
102
103 } // namespace
104