From 194ef23d1c94f1fb7d6860dcc8ddbb5a4d68d122 Mon Sep 17 00:00:00 2001
From: tracer-ics2023 <tracer@njuics.org>
Date: Sun, 1 Sep 2024 16:44:03 +0800
Subject: [PATCH] =?UTF-8?q?>=20=20compile=20NEMU=20221220000=20=E5=BC=A0?=
 =?UTF-8?q?=E4=B8=89=20Linux=20zzy=205.15.146.1-microsoft-standard-WSL2=20?=
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 =?UTF-8?q?x86=5F64=20x86=5F64=20GNU/Linux=20=2016:44:03=20up=201=20day,?=
 =?UTF-8?q?=2015:34,=20=201=20user,=20=20load=20average:=200.26,=200.21,?=
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---
 nemu/src/monitor/sdb/watchpoint.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/nemu/src/monitor/sdb/watchpoint.c b/nemu/src/monitor/sdb/watchpoint.c
index d283a7d..103809d 100644
--- a/nemu/src/monitor/sdb/watchpoint.c
+++ b/nemu/src/monitor/sdb/watchpoint.c
@@ -62,7 +62,7 @@ bool wp_check_hit(void) {
 }
 
 static WP* del_wp(WP** head, WP* pos) {
-  for (WP** i = head; (*i) != NULL && (*i)->next != NULL; i = (WP**)*i) {
+  for (WP** i = head; (*i) != NULL; i = (WP**)*i) {
     if ((**i).NO == pos->NO) {
       WP* res = *i;
       *i = (*i)->next;
@@ -112,6 +112,7 @@ void free_wp(WP *_wp) {
   WP* wp = del_wp(&head, _wp);
   if (wp == NULL) {
     printf("free_wp: no such watchpoint\n");
+    return;
   }
   wp->next = free_;
   free_ = wp;