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 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 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 EXPECT_ALIGNED(raw128.void_data(), 128); 48 49 // NaCl x86-64 compiler emits non-validating instructions for >128 50 // bytes alignment. 51 // http://www.chromium.org/nativeclient/design-documents/nacl-sfi-model-on-x86-64-systems 52 // TODO(hamaji): Ideally, NaCl compiler for x86-64 should workaround 53 // this limitation and this #if should be removed. 54 // https://code.google.com/p/nativeclient/issues/detail?id=3463 55 #if !(defined(OS_NACL) && defined(ARCH_CPU_X86_64)) 56 AlignedMemory<8, 256> raw256; 57 EXPECT_EQ(256u, ALIGNOF(raw256)); 58 EXPECT_ALIGNED(raw256.void_data(), 256); 59 60 AlignedMemory<8, 4096> raw4096; 61 EXPECT_EQ(4096u, ALIGNOF(raw4096)); 62 EXPECT_ALIGNED(raw4096.void_data(), 4096); 63 #endif // !(defined(OS_NACL) && defined(ARCH_CPU_X86_64)) 64 } 65 66 TEST(AlignedMemoryTest, DynamicAllocation) { 67 void* p = base::AlignedAlloc(8, 8); 68 EXPECT_TRUE(p); 69 EXPECT_ALIGNED(p, 8); 70 base::AlignedFree(p); 71 72 p = base::AlignedAlloc(8, 16); 73 EXPECT_TRUE(p); 74 EXPECT_ALIGNED(p, 16); 75 base::AlignedFree(p); 76 77 p = base::AlignedAlloc(8, 256); 78 EXPECT_TRUE(p); 79 EXPECT_ALIGNED(p, 256); 80 base::AlignedFree(p); 81 82 p = base::AlignedAlloc(8, 4096); 83 EXPECT_TRUE(p); 84 EXPECT_ALIGNED(p, 4096); 85 base::AlignedFree(p); 86 } 87 88 TEST(AlignedMemoryTest, ScopedDynamicAllocation) { 89 std::unique_ptr<float, base::AlignedFreeDeleter> p( 90 static_cast<float*>(base::AlignedAlloc(8, 8))); 91 EXPECT_TRUE(p.get()); 92 EXPECT_ALIGNED(p.get(), 8); 93 } 94 95 } // namespace 96
