Now that the kernel distinguishes between process-shared and process-private futexes make libc/libpthread use process-private ones.
ok? Index: lib/libc/thread/synch.h =================================================================== RCS file: /cvs/src/lib/libc/thread/synch.h,v retrieving revision 1.2 diff -u -p -r1.2 synch.h --- lib/libc/thread/synch.h 5 Sep 2017 02:40:54 -0000 1.2 +++ lib/libc/thread/synch.h 3 Jun 2018 21:58:58 -0000 @@ -22,14 +22,14 @@ static inline int _wake(volatile uint32_t *p, int n) { - return futex(p, FUTEX_WAKE, n, NULL, NULL); + return futex(p, FUTEX_WAKE_PRIVATE, n, NULL, NULL); } static inline void _wait(volatile uint32_t *p, int val) { while (*p != (uint32_t)val) - futex(p, FUTEX_WAIT, val, NULL, NULL); + futex(p, FUTEX_WAIT_PRIVATE, val, NULL, NULL); } static inline int @@ -38,7 +38,7 @@ _twait(volatile uint32_t *p, int val, cl struct timespec rel; if (abs == NULL) - return futex(p, FUTEX_WAIT, val, NULL, NULL); + return futex(p, FUTEX_WAIT_PRIVATE, val, NULL, NULL); if (abs->tv_nsec >= 1000000000 || clock_gettime(clockid, &rel)) return (EINVAL); @@ -51,11 +51,11 @@ _twait(volatile uint32_t *p, int val, cl if (rel.tv_sec < 0) return (ETIMEDOUT); - return futex(p, FUTEX_WAIT, val, &rel, NULL); + return futex(p, FUTEX_WAIT_PRIVATE, val, &rel, NULL); } static inline int _requeue(volatile uint32_t *p, int n, int m, volatile uint32_t *q) { - return futex(p, FUTEX_REQUEUE, n, (void *)(long)m, q); + return futex(p, FUTEX_REQUEUE_PRIVATE, n, (void *)(long)m, q); }