cmd/compile/internal/gc: allow //go:systemstack only in runtime

Fixes golang#12454. Change-Id: I6406b0119bc4d6c3d1e6f1896b588b7d101448a3 Reviewed-on: https://go-review.googlesource.com/14274 Run-TryBot: Minux Ma <[email protected]> TryBot-Result: Gobot Gobot <[email protected]> Reviewed-by: Ian Lance Taylor <[email protected]>
Infobyme · Sep 4, 2015 · dac87e9 · dac87e9
1 parent e16d803
commit dac87e9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/cmd/compile/internal/gc/lex.go b/src/cmd/compile/internal/gc/lex.go
@@ -1623,6 +1623,9 @@ func getlinepragma() int {
 		}
 
 		if verb == "go:systemstack" {
+			if compiling_runtime == 0 {
+				Yyerror("//go:systemstack only allowed in runtime")
+			}
 			systemstack = true
 			return c
 		}