From 16ef9d0252318d7e32e445fd7474af55dbaab7db Mon Sep 17 00:00:00 2001 From: "Emilio G. Cota" Date: Sun, 23 Aug 2015 20:23:40 -0400 Subject: qemu-thread: handle spurious futex_wait wakeups Signed-off-by: Emilio G. Cota Message-Id: <1440375847-17603-12-git-send-email-cota@braap.org> Signed-off-by: Paolo Bonzini --- util/qemu-thread-posix.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c index ba67cec..d529405 100644 --- a/util/qemu-thread-posix.c +++ b/util/qemu-thread-posix.c @@ -298,7 +298,16 @@ static inline void futex_wake(QemuEvent *ev, int n) static inline void futex_wait(QemuEvent *ev, unsigned val) { - futex(ev, FUTEX_WAIT, (int) val, NULL, NULL, 0); + while (futex(ev, FUTEX_WAIT, (int) val, NULL, NULL, 0)) { + switch (errno) { + case EWOULDBLOCK: + return; + case EINTR: + break; /* get out of switch and retry */ + default: + abort(); + } + } } #else static inline void futex_wake(QemuEvent *ev, int n) -- cgit v1.1