diff options
| author | davidxu <davidxu@FreeBSD.org> | 2003-08-20 13:43:35 +0000 |
|---|---|---|
| committer | davidxu <davidxu@FreeBSD.org> | 2003-08-20 13:43:35 +0000 |
| commit | 5546ba50272e71097a2f7c6b9fbec902cf58c4ea (patch) | |
| tree | 3cd1b354b573995c2d5791aab5f5469af5ed64ba /lib/libpthread/thread/thr_sig.c | |
| parent | 06152c89ae152b1f399c1796a718a428992b7f5f (diff) | |
| download | FreeBSD-src-5546ba50272e71097a2f7c6b9fbec902cf58c4ea.zip FreeBSD-src-5546ba50272e71097a2f7c6b9fbec902cf58c4ea.tar.gz | |
_thr_sig_check_pending is also called by scope system thread when it leaves
critical region, we wrap some syscalls for thread cancellation point, and
when syscalls returns, we call _thr_leave_cancellation_point, at the time
if a signal comes in, it would be buffered, and when the thread leaves
_thr_leave_cancellation_point, buffered signals will be processed, to avoid
messing up normal syscall errno, we should save and restore errno around
signal handling code.
Diffstat (limited to 'lib/libpthread/thread/thr_sig.c')
| -rw-r--r-- | lib/libpthread/thread/thr_sig.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/libpthread/thread/thr_sig.c b/lib/libpthread/thread/thr_sig.c index 01b0914..26c1317 100644 --- a/lib/libpthread/thread/thr_sig.c +++ b/lib/libpthread/thread/thr_sig.c @@ -750,10 +750,12 @@ _thr_sig_check_pending(struct pthread *curthread) { ucontext_t uc; volatile int once; + int errsave; if (THR_IN_CRITICAL(curthread)) return; + errsave = errno; once = 0; THR_GETCONTEXT(&uc); if (once == 0) { @@ -761,6 +763,7 @@ _thr_sig_check_pending(struct pthread *curthread) curthread->check_pending = 0; _thr_sig_rundown(curthread, &uc, NULL); } + errno = errsave; } #ifndef SYSTEM_SCOPE_ONLY |
