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Fix fork locking on win32 (#1141)

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* Fix fork locking on win32

- __enable_threads / set __threaded in __proc_setup as threads are required for
  win32 subprocess management
- move mmi/fds locking out of pthread_atfork.c into fork.c so it's done anytime
  __threaded is set instead of being dependent of pthreads
- explicitly yoink _pthread_onfork_prepare, _pthread_onfork_parent, and
  _pthread_onfork_child in pthread_create.c so they are linked in in-case they
  are separated from _pthread_atfork

Big Thanks to @dfyz for help with locating the issue, testing, and devising a fix!

* fix child processes not being able to open files, initialize all necessary locks on fork
This commit is contained in:
Gavin Hayes 2024-04-25 23:01:27 -04:00 • committed by GitHub
parent 6e6fc38935
commit 69db501c68
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6 changed files with 49 additions and 23 deletions
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3
libc/thread/pthread_create.c
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@ -60,6 +60,9 @@ __static_yoink("nsync_mu_trylock");
__static_yoink("nsync_mu_rlock");
__static_yoink("nsync_mu_runlock");
__static_yoink("_pthread_atfork");
__static_yoink("_pthread_onfork_prepare");
__static_yoink("_pthread_onfork_parent");
__static_yoink("_pthread_onfork_child");
#define MAP_ANON_OPENBSD 0x1000
#define MAP_STACK_OPENBSD 0x4000