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ImVector: skip memcpy in operator= if Data isn't initialized to play nice with -fsanitize=undefined. (#8874)

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Ian
2025-08-10 14:10:42 -04:00
committed by ocornut
parent b6614f6c7c
commit ea075ed973
2 changed files with 3 additions and 1 deletions
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2
docs/CHANGELOG.txt
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@@ -89,6 +89,8 @@ Other Changes:
- Misc: fixed building with IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION. (#8794)
- Misc: removed more redundant inline static linkage from imgui_internal.h to
facilitate using in C++ modules. (#8813, #8682, #8358) [@stripe2933]
- Misc: ImVector: skip memcpy in operator= if `Data` isn't initialized in order
to play nice with -fsanitize=undefined. (#8874) [@i25e]
- CI: Added SDL3 builds to MacOS and Windows. (#8819, #8778) [@scribam]
- CI: Updated Windows CI to use a more recent SDL2. (#8819, #8778) [@scribam]
- Examples: SDL3+Metal: added SDL3+Metal example. (#8827, #8825) [@shi-yan]

2
imgui.h
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@@ -2181,7 +2181,7 @@ struct ImVector
// Constructors, destructor
inline ImVector() { Size = Capacity = 0; Data = NULL; }
inline ImVector(const ImVector<T>& src) { Size = Capacity = 0; Data = NULL; operator=(src); }
inline ImVector<T>& operator=(const ImVector<T>& src) { clear(); resize(src.Size); if (src.Data) memcpy(Data, src.Data, (size_t)Size * sizeof(T)); return *this; }
inline ImVector<T>& operator=(const ImVector<T>& src) { clear(); resize(src.Size); if (Data && src.Data) memcpy(Data, src.Data, (size_t)Size * sizeof(T)); return *this; }
inline ~ImVector() { if (Data) IM_FREE(Data); } // Important: does not destruct anything
inline void clear() { if (Data) { Size = Capacity = 0; IM_FREE(Data); Data = NULL; } } // Important: does not destruct anything