1 files changed, 20 insertions, 0 deletions
diff --git a/src/pkg/runtime/thread_darwin.c b/src/pkg/runtime/thread_darwin.c
index 556fb67e8..6a83e48a3 100644
--- a/src/pkg/runtime/thread_darwin.c
+++ b/src/pkg/runtime/thread_darwin.c
@@ -477,3 +477,23 @@ runtime·setprof(bool on)
 	else
 		runtime·sigprocmask(SIG_BLOCK, &sigset_prof, nil);
 }
+
+static int8 badcallback[] = "runtime: cgo callback on thread not created by Go.\n";
+
+// This runs on a foreign stack, without an m or a g.  No stack split.
+#pragma textflag 7
+void
+runtime·badcallback(void)
+{
+	runtime·write(2, badcallback, sizeof badcallback - 1);
+}
+
+static int8 badsignal[] = "runtime: signal received on thread not created by Go.\n";
+
+// This runs on a foreign stack, without an m or a g.  No stack split.
+#pragma textflag 7
+void
+runtime·badsignal(void)
+{
+	runtime·write(2, badsignal, sizeof badsignal - 1);
+}