path: root/src
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authorRich Felker <>2015-02-27 23:25:45 -0500
committerRich Felker <>2015-02-27 23:25:45 -0500
commit76ca7a5446a8aec2b671a401d5e1878c4704754e (patch)
treef28de9c011b65effa19b419bd923686a14efc500 /src
parente346ff86c8faee901a7c2d502b5beb983b99f972 (diff)
fix failure of internal futex __timedwait to report ECANCELED
as part of abstracting the futex wait, this function suppresses all futex error values which callers should not see using a whitelist approach. when the masked cancellation mode was added, the new ECANCELED error was not whitelisted. this omission caused the new pthread_cond_wait code using masked cancellation to exhibit a spurious wake (rather than acting on cancellation) when the request arrived after blocking on the cond var.
Diffstat (limited to 'src')
1 files changed, 1 insertions, 1 deletions
diff --git a/src/thread/__timedwait.c b/src/thread/__timedwait.c
index c9ec70cf..9b882b5a 100644
--- a/src/thread/__timedwait.c
+++ b/src/thread/__timedwait.c
@@ -33,7 +33,7 @@ int __timedwait(volatile int *addr, int val,
r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT|priv, val, top);
if (r == ENOSYS) r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT, val, top);
- if (r != EINTR && r != ETIMEDOUT) r = 0;
+ if (r != EINTR && r != ETIMEDOUT && r != ECANCELED) r = 0;
if (!cleanup) __pthread_setcancelstate(cs, 0);