From 0ead18c59e357d79f10e3132d4b1b2fede577cbb Mon Sep 17 00:00:00 2001
From: Dmitriy Vyukov <dvyukov@google.com>
Date: Tue, 6 Nov 2012 20:54:22 +0400
Subject: [PATCH] runtime: mark race instrumentation callbacks as nosplitstack
 It speedups the race detector somewhat, but also prevents getcallerpc() from
 obtaining lessstack().

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/6812091
---
 src/pkg/runtime/race.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/pkg/runtime/race.c b/src/pkg/runtime/race.c
index bea16cc832..ef7eec2b6b 100644
--- a/src/pkg/runtime/race.c
+++ b/src/pkg/runtime/race.c
@@ -47,6 +47,8 @@ runtime·racefini(void)
 }
 
 // Called from instrumented code.
+// If we split stack, getcallerpc() can return runtime·lessstack().
+#pragma textflag 7
 void
 runtime·racewrite(uintptr addr)
 {
@@ -58,6 +60,8 @@ runtime·racewrite(uintptr addr)
 }
 
 // Called from instrumented code.
+// If we split stack, getcallerpc() can return runtime·lessstack().
+#pragma textflag 7
 void
 runtime·raceread(uintptr addr)
 {
@@ -69,6 +73,7 @@ runtime·raceread(uintptr addr)
 }
 
 // Called from instrumented code.
+#pragma textflag 7
 void
 runtime·racefuncenter(uintptr pc)
 {
@@ -83,6 +88,7 @@ runtime·racefuncenter(uintptr pc)
 }
 
 // Called from instrumented code.
+#pragma textflag 7
 void
 runtime·racefuncexit(void)
 {