runtime: make more functions safe for Go
Convert no-op race functions.
Everything else is tiny and gets NOSPLITs.
After this, all that is left on darwin is sysAlloc, panic, and gothrow (all pending).
There may be system-specific calls in other builds.
LGTM=iant
R=golang-codereviews, iant
CC=dvyukov, golang-codereviews, khr, r
https://golang.org/cl/140240044
diff --git a/src/pkg/runtime/race0.go b/src/pkg/runtime/race0.go
index 2e67ae6a..5d90cc8 100644
--- a/src/pkg/runtime/race0.go
+++ b/src/pkg/runtime/race0.go
@@ -14,7 +14,24 @@
const raceenabled = false
-func raceReadObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) {
-}
-func raceWriteObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) {
-}
+// Because raceenabled is false, none of these functions should be called.
+
+func raceReadObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) { gothrow("race") }
+func raceWriteObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) { gothrow("race") }
+func raceinit() { gothrow("race") }
+func racefini() { gothrow("race") }
+func racemapshadow(addr unsafe.Pointer, size uintptr) { gothrow("race") }
+func racewritepc(addr unsafe.Pointer, callerpc, pc uintptr) { gothrow("race") }
+func racereadpc(addr unsafe.Pointer, callerpc, pc uintptr) { gothrow("race") }
+func racereadrangepc(addr unsafe.Pointer, sz, callerpc, pc uintptr) { gothrow("race") }
+func racewriterangepc(addr unsafe.Pointer, sz, callerpc, pc uintptr) { gothrow("race") }
+func raceacquire(addr unsafe.Pointer) { gothrow("race") }
+func raceacquireg(gp *g, addr unsafe.Pointer) { gothrow("race") }
+func racerelease(addr unsafe.Pointer) { gothrow("race") }
+func racereleaseg(gp *g, addr unsafe.Pointer) { gothrow("race") }
+func racereleasemerge(addr unsafe.Pointer) { gothrow("race") }
+func racereleasemergeg(gp *g, addr unsafe.Pointer) { gothrow("race") }
+func racefingo() { gothrow("race") }
+func racemalloc(p unsafe.Pointer, sz uintptr) { gothrow("race") }
+func racegostart(pc uintptr) uintptr { gothrow("race"); return 0 }
+func racegoend() { gothrow("race") }
