From ca2b172a03784fecfd65ae63dd54f8d4c36497e4 Mon Sep 17 00:00:00 2001
From: smcdef <smcdef@outlook.com>
Date: Sun, 3 May 2020 13:42:21 +0800
Subject: [PATCH] Add kretprobe missed event message

Signed-off-by: smcdef <smcdef@outlook.com>
---
 init.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/init.c b/init.c
index 0f28701..76750ce 100644
--- a/init.c
+++ b/init.c
@@ -90,6 +90,11 @@ static void __exit kprobes_exit(void)
 	/* Unregister kretprobes */
 	while (--kretprobe_ptr >= __start_kretprobe_template) {
 		struct kretprobe *kretprobe = *kretprobe_ptr;
+		int nmissed = kretprobe->nmissed;
+
+		if (nmissed)
+			pr_info("kretprobe missed probing %d instances"
+				" of %pS\n", nmissed, kretprobe->kp.addr);
 
 		pr_info("kretprobe unregister at %pS\n", kretprobe->kp.addr);
 		unregister_kretprobe(kretprobe);