c/debug: func addr and info

c/debug/_demo/funcinfo/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/debug"
+)
+
+type T struct {
+	n int
+}
+
+func (t *T) Demo() {
+	println(t.n)
+	addr := debug.Address()
+	c.Printf(c.Str("addr:0x%x\n"), addr)
+	var info debug.Info
+	r := debug.Addrinfo(addr, &info)
+	if r == 0 {
+		panic("not found info")
+	}
+	c.Printf(c.Str("func file:%s name:%s base:0x%x addr:0x%x\n"), info.Fname, info.Sname, info.Fbase, info.Saddr)
+}
+
+func main() {
+	t := &T{100}
+	t.Demo()
+}