Building Bridges: C++ Interop, Foreign Function Interfaces & ABI
summary
Explains how C++ linking actually behaves and shows working tools and gotchas: uses bindgen to generate Rust bindings with static_asserts on sizes and offsets, demos cxx crate ownership patterns (unique_ptr, pinned mutability) and c_unwind for cross-language exceptions, walks the System V AMD64 calling convention detail (six regs, large-return via caller-allocated pointer), and reports that autocxx + codegen plus Bazel + cargo integration produces usable bridges when ABI assumptions are checked.
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chapters (8)
- 0:00Introduction and motivation
- 1:09Understanding ABI basics
- 4:31Platform and C ABI layers
- 7:21Interoperating via C ABI
- 8:53Calling conventions and layout
- 18:40Rust and C++ interoperability
- 25:02Advanced tools for bridging
- 40:22Q&A and conclusions
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