首次提交：初始化项目代码

handoff_trigger_syscall.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+	"time"
+)
+
+func main() {
+	runtime.GOMAXPROCS(1) // 限制为1个P，便于观察Hand-off效果
+
+	ch := make(chan bool)
+
+	go func() {
+		fmt.Println("Goroutine: performing blocking syscall (file read)")
+		_, err := os.ReadFile("dev/urandom") // 阻塞式文件I/O
+		if err != nil {
+			fmt.Println("Error:", err)
+		}
+		fmt.Println("Goroutine: syscall completed")
+		ch <- true
+	}()
+
+	// 主Goroutine持续执行，证明调度未停滞
+	for i := 0; i < 5; i++ {
+		fmt.Printf("Main: iteration %d\n", i)
+		time.Sleep(50 * time.Millisecond)
+	}
+
+	<-ch
+}