tracing: Allow events to share their print functions
Multiple events may use the same method to print their data.
Instead of having all events have a pointer to their print funtions,
the trace_event structure now points to a trace_event_functions structure
that will hold the way to print ouf the event.
The event itself is now passed to the print function to let the print
function know what kind of event it should print.
This opens the door to consolidating the way several events print
their output.
text data bss dec hex filename
4913961 1088356 861512 6863829 68bbd5 vmlinux.orig
4900382 1048964 861512 6810858 67ecea vmlinux.init
4900446 1049028 861512 6810986 67ed6a vmlinux.preprint
This change slightly increases the size but is needed for the next change.
v3: Fix the branch tracer events to handle this change.
v2: Fix the new function graph tracer event calls to handle this change.
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index e7eb334..51ed7f35 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -239,7 +239,8 @@
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, name, proto, args) \
static notrace enum print_line_t \
-ftrace_raw_output_##name(struct trace_iterator *iter, int flags) \
+ftrace_raw_output_##name(struct trace_iterator *iter, int flags, \
+ struct trace_event *event) \
{ \
return ftrace_raw_output_id_##template(event_##name.id, \
#name, iter, flags); \
@@ -248,7 +249,8 @@
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
static notrace enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
+ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
+ struct trace_event *event) \
{ \
struct trace_seq *s = &iter->seq; \
struct ftrace_raw_##template *field; \
@@ -531,11 +533,12 @@
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, call, proto, args) \
- \
-static struct trace_event ftrace_event_type_##call = { \
+static struct trace_event_functions ftrace_event_type_funcs_##call = { \
.trace = ftrace_raw_output_##call, \
}; \
- \
+static struct trace_event ftrace_event_type_##call = { \
+ .funcs = &ftrace_event_type_funcs_##call, \
+}; \
static inline void ftrace_test_probe_##call(void) \
{ \
check_trace_callback_type_##call(ftrace_raw_event_##template); \