Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/src/cmd/cgo/internal/testsanitizers/testdata/tsan5.go b/src/cmd/cgo/internal/testsanitizers/testdata/tsan5.go
new file mode 100644
index 0000000..1214a77
--- /dev/null
+++ b/src/cmd/cgo/internal/testsanitizers/testdata/tsan5.go
@@ -0,0 +1,51 @@
+// 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.
+
+package main
+
+// Check that calls to C.malloc/C.free do not collide with the calls
+// made by the os/user package.
+
+// #cgo CFLAGS: -fsanitize=thread
+// #cgo LDFLAGS: -fsanitize=thread
+// #include <stdlib.h>
+import "C"
+
+import (
+	"fmt"
+	"os"
+	"os/user"
+	"runtime"
+	"sync"
+)
+
+func main() {
+	u, err := user.Current()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		// Let the test pass.
+		os.Exit(0)
+	}
+
+	var wg sync.WaitGroup
+	for i := 0; i < 20; i++ {
+		wg.Add(2)
+		go func() {
+			defer wg.Done()
+			for i := 0; i < 1000; i++ {
+				user.Lookup(u.Username)
+				runtime.Gosched()
+			}
+		}()
+		go func() {
+			defer wg.Done()
+			for i := 0; i < 1000; i++ {
+				p := C.malloc(C.size_t(len(u.Username) + 1))
+				runtime.Gosched()
+				C.free(p)
+			}
+		}()
+	}
+	wg.Wait()
+}