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GeezerVison is showing github.com — WIP: Split interpreter control and data stacks by pablogsal · Pull Request #161699 · python/cpython

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@pablogsal

@pablogsal pablogsal commented Nov 9, 2026

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Work in progress. Do not review yet.

Splits each interpreter frame into a small control record on a contiguous per-thread control stack and a data frame on the data stack.

A record entered from C is marked native and returns straight to C, so there is no separate entry frame. Native records keep the address of a local in their evaluation loop so profilers can still map Python frames to native frames. The debug offsets expose the record state, that address and gi_live_frame, and _remote_debugging walks the contiguous stack.

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@pablogsal @maurycy
Split interpreter control and data stacks
d3c7e05 
Co-authored-by: maurycy <[email protected]>
@pablogsal
pablogsal force-pushed the dual-stack-native branch from 6131d0e to d3c7e05 Compare November 9, 2026 19:55
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@pablogsal
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