Adding upstream version 1.21.8.upstream/1.21.8

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

1 files changed, 37 insertions, 0 deletions

diff --git a/test/fixedbugs/issue19182.go b/test/fixedbugs/issue19182.go
new file mode 100644
index 0000000..f5e44e9
--- /dev/null
+++ b/test/fixedbugs/issue19182.go
@@ -0,0 +1,37 @@
+// run
+// +build !js,!wasip1
+
+// Copyright 2017 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
+
+import (
+	"fmt"
+	"runtime"
+	"sync/atomic"
+	"time"
+)
+
+var a uint64 = 0
+
+func main() {
+	runtime.GOMAXPROCS(2) // With just 1, infinite loop never yields
+
+	go func() {
+		for {
+			atomic.AddUint64(&a, uint64(1))
+		}
+	}()
+
+	time.Sleep(10 * time.Millisecond) // Short sleep is enough in passing case
+	i, val := 0, atomic.LoadUint64(&a)
+	for ; val == 0 && i < 100; val, i = atomic.LoadUint64(&a), i+1 {
+		time.Sleep(100 * time.Millisecond)
+	}
+	if val == 0 {
+		fmt.Printf("Failed to observe atomic increment after %d tries\n", i)
+	}
+
+}