Adding upstream version 1.22.1.upstream/1.22.1

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

1 files changed, 65 insertions, 0 deletions

diff --git a/src/runtime/internal/wasitest/testdata/nonblock.go b/src/runtime/internal/wasitest/testdata/nonblock.go
new file mode 100644
index 0000000..8cbf21b
--- /dev/null
+++ b/src/runtime/internal/wasitest/testdata/nonblock.go
@@ -0,0 +1,65 @@
+// Copyright 2023 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 (
+	"os"
+	"sync"
+	"syscall"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		panic("usage: nonblock <MODE> [PATH...]")
+	}
+	mode := os.Args[1]
+
+	ready := make(chan struct{})
+
+	var wg sync.WaitGroup
+	for _, path := range os.Args[2:] {
+		f, err := os.Open(path)
+		if err != nil {
+			panic(err)
+		}
+		switch mode {
+		case "os.OpenFile":
+		case "os.NewFile":
+			fd := f.Fd()
+			if err := syscall.SetNonblock(int(fd), true); err != nil {
+				panic(err)
+			}
+			f = os.NewFile(fd, path)
+		default:
+			panic("invalid test mode")
+		}
+
+		spawnWait := make(chan struct{})
+
+		wg.Add(1)
+		go func(f *os.File) {
+			defer f.Close()
+			defer wg.Done()
+
+			close(spawnWait)
+
+			<-ready
+
+			var buf [256]byte
+			n, err := f.Read(buf[:])
+			if err != nil {
+				panic(err)
+			}
+			os.Stderr.Write(buf[:n])
+		}(f)
+
+		// Spawn one goroutine at a time.
+		<-spawnWait
+	}
+
+	println("waiting")
+	close(ready)
+	wg.Wait()
+}