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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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2
libc/calls/sigprocmask.c
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@ -61,7 +61,7 @@ int sigprocmask(int how, const sigset_t *opt_set, sigset_t *opt_out_oldset) {
} else if (IsMetal() || IsWindows()) {
rc = __sig_mask(how, opt_set, &old);
if (_weaken(__sig_check)) {
_weaken(__sig_check)(true);
_weaken(__sig_check)(kSigOpRestartable);
}
} else {
rc = sys_sigprocmask(how, opt_set, opt_out_oldset ? &old : 0);