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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "mojo/edk/system/memory.h" | 5 #include "mojo/edk/system/memory.h" |
6 | 6 |
7 #include <limits> | 7 #include <limits> |
8 | 8 |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "build/build_config.h" | 10 #include "build/build_config.h" |
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33 } | 33 } |
34 | 34 |
35 // Explicitly instantiate the sizes we need. Add instantiations as needed. | 35 // Explicitly instantiate the sizes we need. Add instantiations as needed. |
36 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<1, 1>(const void*); | 36 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<1, 1>(const void*); |
37 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<4, 4>(const void*); | 37 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<4, 4>(const void*); |
38 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<8, 4>(const void*); | 38 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<8, 4>(const void*); |
39 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<8, 8>(const void*); | 39 template void MOJO_SYSTEM_IMPL_EXPORT CheckUserPointer<8, 8>(const void*); |
40 | 40 |
41 template <size_t size, size_t alignment> | 41 template <size_t size, size_t alignment> |
42 void MOJO_SYSTEM_IMPL_EXPORT | 42 void MOJO_SYSTEM_IMPL_EXPORT |
43 CheckUserPointerWithCount(const void* pointer, size_t count) { | 43 CheckUserPointerWithCount(const void* pointer, size_t count) { |
44 CHECK_LE(count, std::numeric_limits<size_t>::max() / size); | 44 CHECK_LE(count, std::numeric_limits<size_t>::max() / size); |
45 CHECK(count == 0 || (pointer && IsAligned<alignment>(pointer))); | 45 CHECK(count == 0 || (pointer && IsAligned<alignment>(pointer))); |
46 } | 46 } |
47 | 47 |
48 // Explicitly instantiate the sizes we need. Add instantiations as needed. | 48 // Explicitly instantiate the sizes we need. Add instantiations as needed. |
49 template void MOJO_SYSTEM_IMPL_EXPORT | 49 template void MOJO_SYSTEM_IMPL_EXPORT |
50 CheckUserPointerWithCount<1, 1>(const void*, size_t); | 50 CheckUserPointerWithCount<1, 1>(const void*, size_t); |
51 template void MOJO_SYSTEM_IMPL_EXPORT | 51 template void MOJO_SYSTEM_IMPL_EXPORT |
52 CheckUserPointerWithCount<4, 4>(const void*, size_t); | 52 CheckUserPointerWithCount<4, 4>(const void*, size_t); |
53 template void MOJO_SYSTEM_IMPL_EXPORT | 53 template void MOJO_SYSTEM_IMPL_EXPORT |
54 CheckUserPointerWithCount<8, 4>(const void*, size_t); | 54 CheckUserPointerWithCount<8, 4>(const void*, size_t); |
55 template void MOJO_SYSTEM_IMPL_EXPORT | 55 template void MOJO_SYSTEM_IMPL_EXPORT |
56 CheckUserPointerWithCount<8, 8>(const void*, size_t); | 56 CheckUserPointerWithCount<8, 8>(const void*, size_t); |
57 | 57 |
58 template <size_t alignment> | 58 template <size_t alignment> |
59 void CheckUserPointerWithSize(const void* pointer, size_t size) { | 59 void CheckUserPointerWithSize(const void* pointer, size_t size) { |
60 // TODO(vtl): If running in kernel mode, do a full verification. For now, just | 60 // TODO(vtl): If running in kernel mode, do a full verification. For now, just |
61 // check that it's non-null and aligned. (A faster user mode implementation is | 61 // check that it's non-null and aligned. (A faster user mode implementation is |
62 // also possible if this check is skipped.) | 62 // also possible if this check is skipped.) |
63 CHECK(size == 0 || (!!pointer && internal::IsAligned<alignment>(pointer))); | 63 CHECK(size == 0 || (!!pointer && internal::IsAligned<alignment>(pointer))); |
64 } | 64 } |
65 | 65 |
66 // Explicitly instantiate the sizes we need. Add instantiations as needed. | 66 // Explicitly instantiate the sizes we need. Add instantiations as needed. |
67 template void MOJO_SYSTEM_IMPL_EXPORT | 67 template void MOJO_SYSTEM_IMPL_EXPORT |
68 CheckUserPointerWithSize<1>(const void*, size_t); | 68 CheckUserPointerWithSize<1>(const void*, size_t); |
69 template void MOJO_SYSTEM_IMPL_EXPORT | 69 template void MOJO_SYSTEM_IMPL_EXPORT |
70 CheckUserPointerWithSize<4>(const void*, size_t); | 70 CheckUserPointerWithSize<4>(const void*, size_t); |
71 // Whereas the other |Check...()| functions are usually used with integral typs | 71 // Whereas the other |Check...()| functions are usually used with integral typs |
72 // or arrays of integral types, this one is used with Options structs for which | 72 // or arrays of integral types, this one is used with Options structs for which |
73 // alignment has been explicitly been specified (using |MOJO_ALIGNAS()|), which | 73 // alignment has been explicitly been specified (using |MOJO_ALIGNAS()|), which |
74 // MSVS *does* respect. | 74 // MSVS *does* respect. |
75 #if defined(COMPILER_MSVC) && defined(ARCH_CPU_32_BITS) | 75 #if defined(COMPILER_MSVC) && defined(ARCH_CPU_32_BITS) |
76 template <> | 76 template <> |
77 void MOJO_SYSTEM_IMPL_EXPORT | 77 void MOJO_SYSTEM_IMPL_EXPORT |
78 CheckUserPointerWithSize<8>(const void* pointer, size_t size) { | 78 CheckUserPointerWithSize<8>(const void* pointer, size_t size) { |
79 CHECK(size == 0 || | 79 CHECK(size == 0 || |
80 (!!pointer && reinterpret_cast<uintptr_t>(pointer) % 8 == 0)); | 80 (!!pointer && reinterpret_cast<uintptr_t>(pointer) % 8 == 0)); |
81 } | 81 } |
82 #else | 82 #else |
83 template void MOJO_SYSTEM_IMPL_EXPORT | 83 template void MOJO_SYSTEM_IMPL_EXPORT |
84 CheckUserPointerWithSize<8>(const void*, size_t); | 84 CheckUserPointerWithSize<8>(const void*, size_t); |
85 #endif | 85 #endif |
86 | 86 |
87 } // namespace internal | 87 } // namespace internal |
88 } // namespace system | 88 } // namespace system |
89 } // namespace mojo | 89 } // namespace mojo |
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