mirror of
https://github.com/python/cpython.git
synced 2025-11-03 23:21:29 +00:00
033510e11d
This switches the main pyrepl event loop to always be non-blocking so that it can listen to incoming interruptions from other threads. This also resolves invalid display of exceptions from other threads (gh-123178). This also fixes freezes with pasting and an active input hook.
74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
from __future__ import annotations
|
|
|
|
from dataclasses import dataclass, field
|
|
import traceback
|
|
|
|
|
|
TYPE_CHECKING = False
|
|
if TYPE_CHECKING:
|
|
from threading import Thread
|
|
from types import TracebackType
|
|
from typing import Protocol
|
|
|
|
class ExceptHookArgs(Protocol):
|
|
@property
|
|
def exc_type(self) -> type[BaseException]: ...
|
|
@property
|
|
def exc_value(self) -> BaseException | None: ...
|
|
@property
|
|
def exc_traceback(self) -> TracebackType | None: ...
|
|
@property
|
|
def thread(self) -> Thread | None: ...
|
|
|
|
class ShowExceptions(Protocol):
|
|
def __call__(self) -> int: ...
|
|
def add(self, s: str) -> None: ...
|
|
|
|
from .reader import Reader
|
|
|
|
|
|
def install_threading_hook(reader: Reader) -> None:
|
|
import threading
|
|
|
|
@dataclass
|
|
class ExceptHookHandler:
|
|
lock: threading.Lock = field(default_factory=threading.Lock)
|
|
messages: list[str] = field(default_factory=list)
|
|
|
|
def show(self) -> int:
|
|
count = 0
|
|
with self.lock:
|
|
if not self.messages:
|
|
return 0
|
|
reader.restore()
|
|
for tb in self.messages:
|
|
count += 1
|
|
if tb:
|
|
print(tb)
|
|
self.messages.clear()
|
|
reader.scheduled_commands.append("ctrl-c")
|
|
reader.prepare()
|
|
return count
|
|
|
|
def add(self, s: str) -> None:
|
|
with self.lock:
|
|
self.messages.append(s)
|
|
|
|
def exception(self, args: ExceptHookArgs) -> None:
|
|
lines = traceback.format_exception(
|
|
args.exc_type,
|
|
args.exc_value,
|
|
args.exc_traceback,
|
|
colorize=reader.can_colorize,
|
|
) # type: ignore[call-overload]
|
|
pre = f"\nException in {args.thread.name}:\n" if args.thread else "\n"
|
|
tb = pre + "".join(lines)
|
|
self.add(tb)
|
|
|
|
def __call__(self) -> int:
|
|
return self.show()
|
|
|
|
|
|
handler = ExceptHookHandler()
|
|
reader.threading_hook = handler
|
|
threading.excepthook = handler.exception
|