From 9fa8b11b767429f11c173352ffa506164b193f1c Mon Sep 17 00:00:00 2001
From: Leon Hwang <hffilwlqm@gmail.com>
Date: Fri, 6 Dec 2024 21:22:16 +0800
Subject: [PATCH] bpflbr: Skip tracing bpf progs

Tracing bpf progs, like `fentry` and `fexit`, are not allowed to be
traced by `fentry` or `fexit` again.

Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
---
 internal/bpflbr/bpf_tracing_info.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/internal/bpflbr/bpf_tracing_info.go b/internal/bpflbr/bpf_tracing_info.go
index 436b1da..d13ff90 100644
--- a/internal/bpflbr/bpf_tracing_info.go
+++ b/internal/bpflbr/bpf_tracing_info.go
@@ -15,6 +15,10 @@ type bpfTracingInfo struct {
 }
 
 func (p *bpfProgs) addTracing(id ebpf.ProgramID, funcName string, prog *ebpf.Program) error {
+	if prog.Type() == ebpf.Tracing {
+		return nil
+	}
+
 	key := fmt.Sprintf("%d:%s", id, funcName)
 	if _, ok := p.tracings[key]; ok {
 		return nil