runtime: use raise instead of pthread_self and pthread_kill

pthread_self and pthread_kill are not safe to call from a signal
handler. In particular, pthread_self fails in iOS when called from
a signal handler context.

Use raise instead; it is signal handler safe and simpler.

Change-Id: I0cbfe25151aed245f55d7b76719ce06dc78c6a75
Reviewed-on: https://go-review.googlesource.com/113877
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

1 files changed, 0 insertions, 6 deletions

diff --git a/src/runtime/os_darwin.go b/src/runtime/os_darwin.go
index 4df1fba17d..9a5a03a45d 100644
--- a/src/runtime/os_darwin.go
+++ b/src/runtime/os_darwin.go
@@ -539,12 +539,6 @@ func sigtramp(fn uintptr, infostyle, sig uint32, info *siginfo, ctx unsafe.Point
 //go:noescape
 func setitimer(mode int32, new, old *itimerval)
 
-//go:nosplit
-func raise(sig uint32) {
-	tid := pthread_self()
-	pthread_kill(tid, int(sig))
-}
-
 func raiseproc(sig uint32)
 
 //extern SigTabTT runtime·sigtab[];