From 4d17efe81b88b0ffacb74986d2558e9098afdded Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Tue, 23 Jul 2013 14:43:55 -0400
Subject: [PATCH] misc/cgo/test: test recursive internal OS thread lock

This would have failed with CL 11663043.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/11480045
---
 misc/cgo/test/issue3775.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/misc/cgo/test/issue3775.go b/misc/cgo/test/issue3775.go
index c05a5d4be8..8f81854195 100644
--- a/misc/cgo/test/issue3775.go
+++ b/misc/cgo/test/issue3775.go
@@ -15,6 +15,14 @@ import (
 	"testing"
 )
 
+func init() {
+	// Same as test3775 but run during init so that
+	// there are two levels of internal runtime lock
+	// (1 for init, 1 for cgo).
+	// This would have been broken by CL 11663043.
+	C.lockOSThreadC()
+}
+
 func test3775(t *testing.T) {
 	// Used to panic because of the UnlockOSThread below.
 	C.lockOSThreadC()
-- 
2.48.1