Name: Relative VTables
Start: 2024-08-13T18:30:00-07:00
End: 2024-08-13T20:00:00-07:00
Location: 680 W California Ave

*Relative VTables*
Virtual Tables (or VTables) are essential for runtime polymorphism in C++, but they can be inefficient in PIC (Position-Independent Code) binaries. Relative VTables address this by replacing virtual function pointers in a vtable with PC-relative offsets. This eliminates dynamic relocations, halves VTable sizes, and improves startup time and memory usage. Relative VTables have been beneficial for the Fuchsia Operating System which uses this as the default VTable layout.

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Leonard (call him Leo) is a Software Engineer who works at Google on the Fuchsia Toolchain Team, who is in charge of maintaining a Clang/LLVM toolchain for Fuchsia and Pigweed. Leo has contributed to many parts of LLVM with a focus on Sanitizers and space and memory optimizations. More recently, Leo has been working on expanding usage of LLVM infrastructure and tooling for embedded applications.



Leo Chan