diff options
| author | Heisenberg <lziqiang1@gmail.com> | 2020-08-31 19:22:36 +0800 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2020-09-01 13:23:55 +0000 |
| commit | 4d89b3231d590284e35bff647e597e93fdf41dae (patch) | |
| tree | fd732bdb52aba359f9073f426ed9cb6db4675744 /src/runtime/os_linux.go | |
| parent | 5f5a55679c54784d07643099b55228b6f88c0bdf (diff) | |
| download | go-4d89b3231d590284e35bff647e597e93fdf41dae.tar.xz | |
runtime: remove remnants of signal stack workaround
Updates #35979
Change-Id: Ic3a6e1b5e9d544979a3c8d909a36a55efa3b9c9d
Reviewed-on: https://go-review.googlesource.com/c/go/+/251757
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Diffstat (limited to 'src/runtime/os_linux.go')
| -rw-r--r-- | src/runtime/os_linux.go | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/src/runtime/os_linux.go b/src/runtime/os_linux.go index 9702920bcf..371db73502 100644 --- a/src/runtime/os_linux.go +++ b/src/runtime/os_linux.go @@ -5,7 +5,6 @@ package runtime import ( - "runtime/internal/atomic" "runtime/internal/sys" "unsafe" ) @@ -476,21 +475,7 @@ func rt_sigaction(sig uintptr, new, old *sigactiont, size uintptr) int32 func getpid() int func tgkill(tgid, tid, sig int) -// touchStackBeforeSignal stores an errno value. If non-zero, it means -// that we should touch the signal stack before sending a signal. -// This is used on systems that have a bug when the signal stack must -// be faulted in. See #35777 and #37436. -// -// This is accessed atomically as it is set and read in different threads. -// -// TODO(austin): Remove this after Go 1.15 when we remove the -// mlockGsignal workaround. -var touchStackBeforeSignal uint32 - // signalM sends a signal to mp. func signalM(mp *m, sig int) { - if atomic.Load(&touchStackBeforeSignal) != 0 { - atomic.Cas((*uint32)(unsafe.Pointer(mp.gsignal.stack.hi-4)), 0, 0) - } tgkill(getpid(), int(mp.procid), sig) } |