Jeong, YunWon c578ac0b21 gc: add CollectResult, stats fields, get_referrers, and fix count reset (#7354) ...

* gc: add CollectResult, stats fields, get_referrers, and fix count reset

- Add CollectResult struct with collected/uncollectable/candidates/duration
- Add candidates and duration fields to GcStats and gc.get_stats()
- Pass CollectResult to gc.callbacks info dict
- Reset generation counts for all collected generations (0..=N)
- Return 0 for third value in gc.get_threshold() (3.13+)
- Implement gc.get_referrers() by scanning all tracked objects
- Add DEBUG_COLLECTABLE output for collectable objects
- Update test_gc.py to expect candidates/duration in stats

* Update test_gc from v3.14.3

* Update test_gc.py from CPython v3.15.0a5

Taken from v3.15 (not v3.14.3) because get_stats() candidates/duration
fields were added in 3.13+ and the corresponding test assertions only
exist in 3.15.

* Fix gc_state build on wasm32: skip Instant timing

* Add candidates/duration to gc callback info, mark v3.15 test failures

* Fix gc.get_referrers to exclude executing frames, fix Future cancelled exc leak

- get_referrers: skip frame objects on the execution stack, since
  they are not GC-tracked in CPython (_PyInterpreterFrame)
- _asyncio Future/Task make_cancelled_error_impl: clear the stored
  cancelled exception after returning it, matching the Python
  _make_cancelled_error behavior

* Fix gc.get_threshold to return actual gen2 threshold value

* Fix inconsistent GC count reset in early-return paths

Use the same reset_end formula in unreachable-empty early returns
as in the main collection path and collecting-empty path.

* Accept keyword arguments in socket.__init__

Use a FromArgs struct instead of a positional-only tuple so that
family, type, proto, and fileno can be passed as keyword arguments.

* Disable comp_inlined in symbol table to match compiler

The compiler does not yet implement PEP 709 inlined comprehensions
(is_inlined_comprehension_context always returns false), but the
symbol table was marking comprehensions as inlined. This mismatch
could cause comprehension-local symbols to be merged into the parent
scope while the compiler still looks them up in a separate scope.

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Co-authored-by: CPython Developers <>

2026-03-12 20:48:22 +09:00

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