bpflbr: Ignore ErrKeyNotExist when lookup func_stacks map

It is weird that fails to lookup `func_stacks` map, as the `func_stack_id` is prepared by bpf prog. Signed-off-by: Leon Hwang <[email protected]>
Asphaltt · Dec 6, 2024 · 593feb9 · 593feb9
1 parent 6720f2b
commit 593feb9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/internal/bpflbr/lbr.go b/internal/bpflbr/lbr.go
@@ -215,6 +215,9 @@ func getFuncStack(event *Event, progs *bpfProgs, addr2line *Addr2Line, ksym *Kal
 	var data FuncStack
 	err := funcStacks.Lookup(id, &data)
 	if err != nil {
+		if errors.Is(err, ebpf.ErrKeyNotExist) {
+			return stack, nil
+		}
 		return stack, fmt.Errorf("failed to lookup func stack map: %w", err)
 	}
 	_ = funcStacks.Delete(id)