Date: Fri, 02 Sep 2005 13:57:29 -0400 From: Ben Thomas <bthomas@virtualiron.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/85651: [patch] debugging code to show entries in event handler list Message-ID: <43189289.7020602@virtualiron.com> Resent-Message-ID: <200509021800.j82I0ZPw055211@freefall.freebsd.org>
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>Number: 85651
>Category: kern
>Synopsis: [patch] debugging code to show entries in event handler list
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Fri Sep 02 18:00:35 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Ben Thomas
>Release: FreeBSD 5.4-RELEASE i386
>Organization:
Virtual Iron Software
>Environment:
System: FreeBSD bthomas4.katana-technology.com 5.4-RELEASE FreeBSD 5.4-RELEASE #10: Sun Aug 28 13:48:00 EDT 2005 ben@bthomas4.katana-technology.com:/usr/obj/usr/home/ben/BSD/RELENG_5_4_0_RELEASE/src/sys/BEN i386
>Description:
Add a debugging routine to print the entries in an eventhandler list
This has been very useful, to me, when debugging a number of problems.
This patch is against the 5_4_0_RELEASE code
>How-To-Repeat:
>Fix:
--- eventhandler.h-DIFF begins here ---
--- /usr/src.original/sys/sys/eventhandler.h Sat Mar 13 21:06:28 2004
+++ /usr/src/sys/sys/eventhandler.h Thu Aug 11 17:03:41 2005
@@ -130,6 +130,7 @@
eventhandler_tag tag);
struct eventhandler_list *eventhandler_find_list(char *name);
void eventhandler_prune_list(struct eventhandler_list *list);
+void eventhandler_print_list(char *name);
/*
* Standard system event queues.
--- eventhandler.h-DIFF ends here ---
--- subr_eventhandler.c-DIFF begins here ---
--- /usr/src.original/sys/kern/subr_eventhandler.c Tue Jun 10 20:56:57 2003
+++ /usr/src/sys/kern/subr_eventhandler.c Thu Aug 11 17:05:01 2005
@@ -239,3 +239,30 @@
ep = en;
}
}
+/*
+ * Routine to print list of routines to be called by an event handler.
+ * This is to assist with debugging.
+ */
+
+void
+eventhandler_print_list(char *name)
+{
+ struct eventhandler_entry_generic *_ep;
+ struct eventhandler_entry *_ee;
+ struct eventhandler_list *list;
+
+ mtx_lock(&eventhandler_mutex);
+ list = _eventhandler_find_list(name);
+ if (list == NULL) {
+ printf("%s: no such event list '%s'\n", __FUNCTION__, name);
+ return;
+ }
+
+ printf("Eventhandler list '%s':\n", name);
+ TAILQ_FOREACH(_ee, &((list)->el_entries), ee_link) {
+ _ep = (struct eventhandler_entry_generic *)_ee;
+ printf(" %d: %p\n", _ep->ee.ee_priority, _ep->func);
+ }
+
+ return;
+}
--- subr_eventhandler.c-DIFF ends here ---
>Release-Note:
>Audit-Trail:
>Unformatted:
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