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[subinterpreters][meta] Move fields from _PyRuntimeState to PyInterpreterState. #81058
Description
| BPO | 36877 |
|---|---|
| Nosy | @vstinner, @phsilva, @ericsnowcurrently, @soltysh |
| Superseder |
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields:
assignee = 'https://github.com/ericsnowcurrently'
closed_at = <Date 2020-05-15.01:31:54.956>
created_at = <Date 2019-05-10.19:11:57.764>
labels = ['expert-subinterpreters', '3.8']
title = '[subinterpreters][meta] Move fields from _PyRuntimeState to PyInterpreterState.'
updated_at = <Date 2020-05-15.01:31:54.955>
user = 'https://github.com/ericsnowcurrently'bugs.python.org fields:
activity = <Date 2020-05-15.01:31:54.955>
actor = 'vstinner'
assignee = 'eric.snow'
closed = True
closed_date = <Date 2020-05-15.01:31:54.956>
closer = 'vstinner'
components = ['Subinterpreters']
creation = <Date 2019-05-10.19:11:57.764>
creator = 'eric.snow'
dependencies = []
files = []
hgrepos = []
issue_num = 36877
keywords = []
message_count = 4.0
messages = ['342120', '342121', '342126', '368907']
nosy_count = 4.0
nosy_names = ['vstinner', 'phsilva', 'eric.snow', 'maciej.szulik']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '40512'
type = None
url = 'https://bugs.python.org/issue36877'
versions = ['Python 3.8']
Activity
ericsnowcurrently commentedon May 10, 2019
We have quite a bit of global state the runtime that effectively breaks the isolation between interpreters. Some of it exists as "global" C variables (see bpo-36876) and the rest as fields on _PyRuntimeState. The offending state should be moved to PyInterpreterState.
See Include/internal/pycore_pystate.h for the _PyRuntimeState and PyInterpreterState structs.
ericsnowcurrently commentedon May 10, 2019
FYI, I've already started some of this work:
Other bits I'm planning on:
Note that, to make the GIL per-interpreter, we can't have any remaining runtime state shared by interpreters (unless it is protected by its own locks).
ericsnowcurrently commentedon May 10, 2019
In conjunction with bpo-36876, there are a bunch of currently ignored globals (in Tools/c-globals/ignored-globals.txt) that should actually be moved to per-interpreter runtime state. This mostly applies to any globals that point to one or more objects, since objects must not be shared by interpreters.
[-][meta] Move fields from _PyRuntimeState to PyInterpreterState.[/-][+][subinterpreters][meta] Move fields from _PyRuntimeState to PyInterpreterState.[/+]vstinner commentedon May 15, 2020
I mark this issue as a duplicate of bpo-40512.