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| author | Ankit Meel <ankitjmeel@gmail.com> | 2020-10-01 21:21:01 +0300 |
|---|---|---|
| committer | Ankit Meel <ankitjmeel@gmail.com> | 2020-10-08 20:44:25 +0300 |
| commit | a31a87f8943aa4029ff0f23a6dc46f5d0c895e8b (patch) | |
| tree | 7a1e048fd7f6679815dfe5602398207defa1f6c6 /source/blender/blenlib/BLI_utildefines.h | |
| parent | 569510d7044043b42a3abfa55e739a89673ed14f (diff) | |
T81340: UBSan: load of value .. not valid for GPU enum type
The underlying type of the enum cannot be fixed here due to its usage
in C code.
All the values possible in the width of the underlying type are not
valid for an enum.
Only 0 to (2*max - 1) if all enumerators are unsigned.
So the macro asks for the biggest value among the //listed// ones.
If any enumerator C is set to say `A|B`, then C would be the maximum.
(2*max-1) is used as the mask.
The warnings (for each enum modified in this commit):
GPU_vertex_buffer.h:43:1: runtime error: load of value 4294967291
which is not a valid value for type 'GPUVertBufStatus'
https://github.com/llvm/llvm-project/commit/1c2c9867
Ref T81340
Reviewed By: fclem
Differential Revision: https://developer.blender.org/D9067
Diffstat (limited to 'source/blender/blenlib/BLI_utildefines.h')
| -rw-r--r-- | source/blender/blenlib/BLI_utildefines.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/source/blender/blenlib/BLI_utildefines.h b/source/blender/blenlib/BLI_utildefines.h index 326015e8d80..40d24f07c25 100644 --- a/source/blender/blenlib/BLI_utildefines.h +++ b/source/blender/blenlib/BLI_utildefines.h @@ -782,7 +782,8 @@ extern bool BLI_memory_is_zero(const void *arr, const size_t arr_size); /* Useful to port C code using enums to C++ where enums are strongly typed. * To use after the enum declaration. */ -# define ENUM_OPERATORS(_enum_type) \ +/* If any enumerator `C` is set to say `A|B`, then `C` would be the max enum value. */ +# define ENUM_OPERATORS(_enum_type, _max_enum_value) \ inline constexpr _enum_type operator|(_enum_type a, _enum_type b) \ { \ return static_cast<_enum_type>(static_cast<int>(a) | b); \ @@ -793,7 +794,7 @@ extern bool BLI_memory_is_zero(const void *arr, const size_t arr_size); } \ inline constexpr _enum_type operator~(_enum_type a) \ { \ - return static_cast<_enum_type>(~static_cast<int>(a)); \ + return static_cast<_enum_type>(~static_cast<int>(a) & (2 * _max_enum_value - 1)); \ } \ inline _enum_type &operator|=(_enum_type &a, _enum_type b) \ { \ @@ -806,7 +807,7 @@ extern bool BLI_memory_is_zero(const void *arr, const size_t arr_size); #else /* Output nothing. */ -# define ENUM_OPERATORS(_type) +# define ENUM_OPERATORS(_type, _max) #endif /** \} */ |