Let plugins get access to the function map

Added:

  const char *pevent_find_function(unsigned long long addr)

This will find the function name that maps to the address addr.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

3 files changed, 16 insertions, 2 deletions

diff --git a/parse-events.c b/parse-events.c
index f7b8bce..9d60443 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -240,6 +240,17 @@ static struct func_map *find_func(unsigned long long addr)
         return func;
 }
 
+const char *pevent_find_function(unsigned long long addr)
+{
+        struct func_map *map;
+
+        map = find_func(addr);
+        if (!map)
+                return NULL;
+
+        return map->func;
+}
+
 int pevent_register_function(char *func, unsigned long long addr,
                              char *mod)
 {
diff --git a/parse-events.h b/parse-events.h
index ff597ef..b4e0422 100644
--- a/parse-events.h
+++ b/parse-events.h
@@ -300,6 +300,7 @@ int pevent_register_event_handler(int id, char *sys_name, char *event_name,
                                   pevent_event_handler_func func);
 
 struct format_field *pevent_find_field(struct event *event, const char *name);
+const char *pevent_find_function(unsigned long long addr);
 
 
 /* for debugging */
diff --git a/test_plugin.c b/test_plugin.c
index 802c7e0..db98c8b 100644
--- a/test_plugin.c
+++ b/test_plugin.c
@@ -42,6 +42,7 @@ static int timer_expire_handler(struct trace_seq *s, void *data, int size,
 static int timer_start_handler(struct trace_seq *s, void *data, int size,
                                struct event *event)
 {
+        const char *func;
         void *hrtimer;
         void *function;
         long long expires;
@@ -58,6 +59,7 @@ static int timer_start_handler(struct trace_seq *s, void *data, int size,
         if (offset < 0)
                 return 0;
         function = *(void **)(data + offset);
+        func = pevent_find_function((unsigned long long)function);
 
         offset = get_offset(s, event, "expires");
         if (offset < 0)
@@ -69,8 +71,8 @@ static int timer_start_handler(struct trace_seq *s, void *data, int size,
                 return 0;
         soft = *(long long *)(data + offset);
 
-        ret = trace_seq_printf(s, "hrtimer=%p function=%pf expires=%llu softexpires=%llu",
-                               hrtimer, function,
+        ret = trace_seq_printf(s, "hrtimer=%p function=%s expires=%llu softexpires=%llu",
+                               hrtimer, func,
                                expires, soft);
         return ret;
 }