runtime: convert slice operations to Go.
LGTM=bradfitz, dvyukov
R=golang-codereviews, bradfitz, dvyukov
CC=golang-codereviews
https://golang.org/cl/120190044
diff --git a/src/pkg/runtime/stubs.go b/src/pkg/runtime/stubs.go
index ceb8031..fa1fa85 100644
--- a/src/pkg/runtime/stubs.go
+++ b/src/pkg/runtime/stubs.go
@@ -27,6 +27,9 @@
//go:noescape
func racereadrangepc(addr unsafe.Pointer, len int, callpc, pc uintptr)
+//go:noescape
+func racewriterangepc(addr unsafe.Pointer, len int, callpc, pc uintptr)
+
// Should be a built-in for unsafe.Pointer?
func add(p unsafe.Pointer, x uintptr) unsafe.Pointer {
return unsafe.Pointer(uintptr(p) + x)
