1 files changed, 54 insertions, 0 deletions
diff --git a/misc/cgo/test/cgo_thread_lock.go b/misc/cgo/test/cgo_thread_lock.go
new file mode 100644
index 0000000..3b9ac84
--- /dev/null
+++ b/misc/cgo/test/cgo_thread_lock.go
@@ -0,0 +1,54 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux && freebsd && openbsd
+// +build linux,freebsd,openbsd
+
+package cgotest
+
+/*
+#include <unistd.h>
+#include <sys/syscall.h>
+void Gosched(void);
+static int Ctid(void) { Gosched(); return syscall(SYS_gettid); }
+*/
+import "C"
+
+import (
+	"runtime"
+	"syscall"
+	"testing"
+	"time"
+)
+
+//export Gosched
+func Gosched() {
+	runtime.Gosched()
+}
+
+func init() {
+	testThreadLockFunc = testThreadLock
+}
+
+func testThreadLock(t *testing.T) {
+	stop := make(chan int)
+	go func() {
+		// We need the G continue running,
+		// so the M has a chance to run this G.
+		for {
+			select {
+			case <-stop:
+				return
+			case <-time.After(time.Millisecond * 100):
+			}
+		}
+	}()
+	defer close(stop)
+
+	for i := 0; i < 1000; i++ {
+		if C.int(syscall.Gettid()) != C.Ctid() {
+			t.Fatalf("cgo has not locked OS thread")
+		}
+	}
+}