linux-kernel - [PATCH v6 50/57] dyndbg: count unique callsites

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Date:   Sun,  4 Sep 2022 15:41:27 -0600
From:   Jim Cromie <jim.cromie@...il.com>
To:     jbaron@...mai.com, gregkh@...uxfoundation.org,
        dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        intel-gvt-dev@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     daniel.vetter@...ll.ch, seanpaul@...omium.org, robdclark@...il.com,
        linux@...musvillemoes.dk, joe@...ches.com,
        Jim Cromie <jim.cromie@...il.com>
Subject: [PATCH v6 50/57] dyndbg: count unique callsites

Count de-duplicated callsites.  Since the _ddebug_site excludes
lineno, all callsites in a function are identical, and this
effectively counts functions in the module with callsites.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 91fe7fb5dda9..891d70d7fed4 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -1348,7 +1348,7 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base,
 			       unsigned int *packed_base)
 {
 	struct ddebug_table *dt;
-	int i;
+	int i, num_funcs = 0;
 
 	v3pr_info("add-module: %s %d/%d sites, start: %d\n", modname, di->num_descs, di->num_sites, base);
 	if (!di->num_descs) {
@@ -1381,12 +1381,11 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base,
 	//BUG_ON(di->num_descs != di->num_sites);
 
 	for (i = 0; i < di->num_descs; i++) {
-
-		if (di->sites[i]._function != packed_sites[(*packed_base)]._function)
-
+		if (di->sites[i]._function != packed_sites[(*packed_base)]._function) {
+			num_funcs++;
 			memcpy((void *) &packed_sites[++(*packed_base)],
 			       (void *) &di->sites[i], sizeof(struct _ddebug_site));
-
+		}
 		di->descs[i]._index = i + base;
 		di->descs[i]._map = *packed_base;
 
@@ -1397,7 +1396,7 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base,
 	list_add_tail(&dt->link, &ddebug_tables);
 	mutex_unlock(&ddebug_lock);
 
-	vpr_info("%3u debug prints in module %s\n", di->num_descs, modname);
+	vpr_info("%3u debug prints in %d functions, in module %s\n", di->num_descs, num_funcs, modname);
 	return 0;
 }
 
-- 
2.37.2