chore(prog): Add autoattach api

Signed-off-by: Tao Chen <chen.dylane@gmail.com>
Co-authored-by: Geyslan Gregório <geyslan@gmail.com>

prog.go

@@ -111,6 +111,14 @@ func (p *BPFProg) SetAutoload(autoload bool) error {
 	return nil
 }
 
+func (p *BPFProg) SetAutoattach(autoload bool) {
+	C.bpf_program__set_autoattach(p.prog, C.bool(autoload))
+}
+
+func (p *BPFProg) Autoattach() bool {
+	return bool(C.bpf_program__autoattach(p.prog))
+}
+
 // AttachGeneric is used to attach the BPF program using autodetection
 // for the attach target. You can specify the destination in BPF code
 // via the SEC() such as `SEC("fentry/some_kernel_func")`

selftest/set-attach/main.go

@@ -40,6 +40,15 @@ func main() {
 		os.Exit(-1)
 	}
 
+	// Test auto attach
+	autoAttachOrig := prog.Autoattach()
+	prog.SetAutoattach(!autoAttachOrig)
+	if prog.Autoattach() == autoAttachOrig {
+		fmt.Fprintln(os.Stderr, "set auto attach failed")
+		os.Exit(-1)
+	}
+	prog.SetAutoattach(autoAttachOrig)
+
 	err = bpfModule.BPFLoadObject()
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err)