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From a284f85b304943160ced86a195e4c66c1683995d Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Wed, 21 May 2014 18:33:14 +0200
Subject: [PATCH hurd 06/12] libpager: annotate objects managed by libports
Label _pager_class and provide a function which prints a
human-readable description of a pager object.
* libpager/pager-create.c (format_debug_info): New function.
(create_class): Label _pager_class.
---
libpager/pager-create.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/libpager/pager-create.c b/libpager/pager-create.c
index b583f02..422e8f4 100644
--- a/libpager/pager-create.c
+++ b/libpager/pager-create.c
@@ -15,6 +15,8 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+#include <stdio.h>
+
#include "priv.h"
/* Create and return a new pager with user info UPI. */
@@ -50,6 +52,23 @@ pager_create (struct user_pager_info *upi,
return p;
}
+/* Provide a human-readable description of the given pager object. */
+static error_t
+format_debug_info (const void *port, char *buffer, size_t size)
+{
+ const struct pager *pager = port;
+ const struct port_info *pi = port;
+
+ snprintf (buffer, size,
+ "bucket: %s, class: %s, may_cache: %d",
+ pi->bucket->label,
+ pi->class->label,
+ /* XXX I have no idea what might be interesting to print
+ here, but it is straight forward to add stuff. */
+ pager->may_cache);
+
+ return 0;
+}
/* This causes the function to be run at startup by compiler magic. */
static void create_class (void) __attribute__ ((constructor));
@@ -58,5 +77,6 @@ static void
create_class ()
{
_pager_class = ports_create_class (_pager_clean, _pager_real_dropweak);
+ ports_label_class (_pager_class, "_pager_class", format_debug_info);
(void) &create_class; /* Avoid warning */
}
--
2.1.4
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