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runtime: for c-archive/c-shared, install signal handlers synchronously

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The previous behaviour of installing the signal handlers in a separate
thread meant that Go initialization raced with non-Go initialization if
the non-Go initialization also wanted to install signal handlers.  Make
installing signal handlers synchronous so that the process-wide behavior
is predictable.

Update #9896.

Change-Id: Ice24299877ec46f8518b072a381932d273096a32
Reviewed-on: https://go-review.googlesource.com/18150
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This commit is contained in:
Ian Lance Taylor 2015-12-26 09:51:59 -08:00
parent 0b3807a2a3
commit 21b4f234c7
23 changed files with 200 additions and 12 deletions
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13
src/runtime/os3_solaris.go
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@ -279,6 +279,8 @@ func memlimit() uintptr {
func sigtramp()
//go:nosplit
//go:nowritebarrierrec
func setsig(i int32, fn uintptr, restart bool) {
var sa sigactiont
@ -295,6 +297,8 @@ func setsig(i int32, fn uintptr, restart bool) {
sigaction(i, &sa, nil)
}
//go:nosplit
//go:nowritebarrierrec
func setsigstack(i int32) {
var sa sigactiont
sigaction(i, nil, &sa)
@ -306,6 +310,8 @@ func setsigstack(i int32) {
sigaction(i, &sa, nil)
}
//go:nosplit
//go:nowritebarrierrec
func getsig(i int32) uintptr {
var sa sigactiont
sigaction(i, nil, &sa)
@ -328,6 +334,8 @@ func signalstack(s *stack) {
sigaltstack(&st, nil)
}
//go:nosplit
//go:nowritebarrierrec
func updatesigmask(m sigmask) {
var mask sigset
copy(mask.__sigbits[:], m[:])
@ -478,6 +486,8 @@ func pthread_create(thread *pthread, attr *pthreadattr, fn uintptr, arg unsafe.P
return int32(sysvicall4(&libc_pthread_create, uintptr(unsafe.Pointer(thread)), uintptr(unsafe.Pointer(attr)), uintptr(fn), uintptr(arg)))
}
//go:nosplit
//go:nowritebarrierrec
func raise(sig int32) /* int32 */ {
sysvicall1(&libc_raise, uintptr(sig))
}
@ -516,6 +526,8 @@ func setitimer(which int32, value *itimerval, ovalue *itimerval) /* int32 */ {
sysvicall3(&libc_setitimer, uintptr(which), uintptr(unsafe.Pointer(value)), uintptr(unsafe.Pointer(ovalue)))
}
//go:nosplit
//go:nowritebarrierrec
func sigaction(sig int32, act *sigactiont, oact *sigactiont) /* int32 */ {
sysvicall3(&libc_sigaction, uintptr(sig), uintptr(unsafe.Pointer(act)), uintptr(unsafe.Pointer(oact)))
}
@ -527,6 +539,7 @@ func sigaltstack(ss *sigaltstackt, oss *sigaltstackt) /* int32 */ {
}
//go:nosplit
//go:nowritebarrierrec
func sigprocmask(how int32, set *sigset, oset *sigset) /* int32 */ {
sysvicall3(&libc_sigprocmask, uintptr(how), uintptr(unsafe.Pointer(set)), uintptr(unsafe.Pointer(oset)))
}