Commit Graph

1 Commits (82e5816aac9d8f7875f28cbf329ce8eba496fcd7)

Author SHA1 Message Date
Matt Davis 047affbdc5
Prevent stdio deadlock in forked children (#79522) (#79539)
* background threads writing to stdout/stderr can cause children to deadlock if a thread in the parent holds the internal lock on the BufferedWriter wrapper
* prevent writes to std handles during fork by monkeypatching stdout/stderr during display startup to require a mutex lock with fork(); this ensures no background threads can hold the lock during a fork operation
* add integration test that fails reliably on Linux without this fix

(cherry picked from commit 1424484be0)
2 years ago