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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/clock_nanosleep-nt.c
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@ -34,7 +34,7 @@ textwindows int sys_clock_nanosleep_nt(int clock, int flags,
for (;;) {
if (sys_clock_gettime_nt(clock, &now)) return -1;
if (timespec_cmp(now, abs) >= 0) return 0;
if (_check_interrupts(false, g_fds.p)) return -1;
if (_check_interrupts(0, g_fds.p)) return -1;
SleepEx(MIN(__SIG_POLLING_INTERVAL_MS,
timespec_tomillis(timespec_sub(abs, now))),
false);
@ -45,7 +45,7 @@ textwindows int sys_clock_nanosleep_nt(int clock, int flags,
for (;;) {
sys_clock_gettime_nt(clock, &now);
if (timespec_cmp(now, abs) >= 0) return 0;
if (_check_interrupts(false, g_fds.p)) {
if (_check_interrupts(0, g_fds.p)) {
if (rem) *rem = timespec_sub(abs, now);
return -1;
}