Per-interpreter runtime state and a process-wide GC stop-the-world - #8517

Merged

youknowone merged 27 commits into

RustPython:mainfrom

youknowone:subinterpreter-foundation

Aug 16, 2026

Commits on Aug 15, 2026

vm: add per-interpreter runtime state and interpreter registry
youknowone
committed
5c341d2
gc: stop every interpreter while collecting
youknowone
committed
43f4b23
vm: scope the interpreter registry per thread without threading
youknowone
committed
ffd3d1e
vm: keep the interpreter registry usable across bootstrap, drop and fork
youknowone
committed
0079994
vm: attach and detach thread slots when switching interpreters
youknowone
committed
8f108ff
vm: list only the current interpreter's subclasses
youknowone
committed
696a8c1
gc: give each interpreter its own collector state
youknowone
committed
562b657
_queue, _thread: detach before taking locks held across waits
youknowone
committed
30e2020
_io, _winapi: detach on the remaining stopped-holdable lock takes
youknowone
committed
5ce062e
gc: size the interpreter owner tag to the header padding
youknowone
committed
87b6c68
vm: reuse cleared frame blocks and shorten interpreter hot paths
youknowone
committed
fd27902
gc, vm: address review notes on owner tags and interpreter docs
youknowone
committed
c3fcc70
vm: gate interpreter registration on stop-the-world admission
youknowone
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57428cd
gc: keep the tracking counters off the barrier path
youknowone
committed
8d07831
dict: settle lookups and iteration steps under one read guard
youknowone
committed
4e518d3
vm: build a call's argument vector once
youknowone
committed
eb94daf
vm: reach an instance dict without cloning it
youknowone
committed
f70db35
vm: shorten the per-instruction safepoint and the call preamble
youknowone
committed
4a76424
vm: give KwArgs a zero-sized hasher
youknowone
committed
b0f0dcc
vm: promote borrowed stack refs before a yield
youknowone
committed
f9bbc6d
vm: run the exact-args vectorcall on a heap frame again
youknowone
committed
b4bb43c

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Per-interpreter runtime state and a process-wide GC stop-the-world - #8517

Per-interpreter runtime state and a process-wide GC stop-the-world#8517
youknowone merged 27 commits into
RustPython:mainfrom
youknowone:subinterpreter-foundation

Commits on Aug 15, 2026

vm: add per-interpreter runtime state and interpreter registry

gc: stop every interpreter while collecting

vm: scope the interpreter registry per thread without threading

vm: keep the interpreter registry usable across bootstrap, drop and fork

vm: attach and detach thread slots when switching interpreters

vm: list only the current interpreter's subclasses

gc: give each interpreter its own collector state

_queue, _thread: detach before taking locks held across waits

_io, _winapi: detach on the remaining stopped-holdable lock takes

gc: size the interpreter owner tag to the header padding

vm: reuse cleared frame blocks and shorten interpreter hot paths

gc, vm: address review notes on owner tags and interpreter docs

vm: gate interpreter registration on stop-the-world admission

gc: keep the tracking counters off the barrier path

dict: settle lookups and iteration steps under one read guard

vm: build a call's argument vector once

vm: reach an instance dict without cloning it

vm: shorten the per-instruction safepoint and the call preamble

vm: give KwArgs a zero-sized hasher

vm: promote borrowed stack refs before a yield

vm: run the exact-args vectorcall on a heap frame again

Commits on Aug 16, 2026

vm: release a tail call's function at the callee's return

vm: stop copying a running frame's locals when it materializes

vm: key data stack frame reuse on the exact frame size

vm: store the frame object payload address in the cross-thread slot

vm: copy a foreign thread's frames instead of linking them

vm: resolve the two rustdoc links this branch added