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Make forking off threads reliable on Windows

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This change makes posix_spawn_test no longer flaky on Windows, by (1)
fixing a race condition in wait(), and (2) removing a misguided vfork
implementation which was letting Windows bypass pthread_atfork().
This commit is contained in:
Justine Tunney 2023-07-30 08:55:01 -07:00
parent 2ebc5781a1
commit 58352df0a4
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GPG key ID: BE714B4575D6E328
30 changed files with 230 additions and 187 deletions
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4
libc/calls/poll-nt.c
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@ -65,7 +65,7 @@ textwindows int sys_poll_nt(struct pollfd *fds, uint64_t nfds, uint64_t *ms,
if (sigmask) {
__sig_mask(SIG_SETMASK, sigmask, &oldmask);
}
if ((rc = _check_interrupts(false, g_fds.p))) {
if ((rc = _check_interrupts(0, g_fds.p))) {
goto ReturnPath;
}
@ -190,7 +190,7 @@ textwindows int sys_poll_nt(struct pollfd *fds, uint64_t nfds, uint64_t *ms,
}
// otherwise loop limitlessly for timeout to elapse while
// checking for signal delivery interrupts, along the way
if ((rc = _check_interrupts(false, g_fds.p))) {
if ((rc = _check_interrupts(0, g_fds.p))) {
goto ReturnPath;
}
}