1 files changed, 53 insertions, 0 deletions
diff --git a/src/runtime/testdata/testwinsignal/main.go b/src/runtime/testdata/testwinsignal/main.go
new file mode 100644
index 0000000..e1136f3
--- /dev/null
+++ b/src/runtime/testdata/testwinsignal/main.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+func main() {
+	// Ensure that this process terminates when the test times out,
+	// even if the expected signal never arrives.
+	go func() {
+		io.Copy(io.Discard, os.Stdin)
+		log.Fatal("stdin is closed; terminating")
+	}()
+
+	// Register to receive all signals.
+	c := make(chan os.Signal, 1)
+	signal.Notify(c)
+
+	// Get console window handle.
+	kernel32 := syscall.NewLazyDLL("kernel32.dll")
+	getConsoleWindow := kernel32.NewProc("GetConsoleWindow")
+	hwnd, _, err := getConsoleWindow.Call()
+	if hwnd == 0 {
+		log.Fatal("no associated console: ", err)
+	}
+
+	// Send message to close the console window.
+	const _WM_CLOSE = 0x0010
+	user32 := syscall.NewLazyDLL("user32.dll")
+	postMessage := user32.NewProc("PostMessageW")
+	ok, _, err := postMessage.Call(hwnd, _WM_CLOSE, 0, 0)
+	if ok == 0 {
+		log.Fatal("post message failed: ", err)
+	}
+
+	sig := <-c
+
+	// Allow some time for the handler to complete if it's going to.
+	//
+	// (In https://go.dev/issue/41884 the handler returned immediately,
+	// which caused Windows to terminate the program before the goroutine
+	// that received the SIGTERM had a chance to actually clean up.)
+	time.Sleep(time.Second)
+
+	// Print the signal's name: "terminated" makes the test succeed.
+	fmt.Println(sig)
+}