perf trace: Add Perl scripting support
Implement trace_scripting_ops to make Perl a supported perf
trace scripting language.
Additionally adds code that allows Perl trace scripts to access
the 'flag' and 'symbolic' (__print_flags(), __print_symbolic())
field information parsed from the trace format files.
Also adds the Perl implementation of the generate_script()
trace_scripting_op, which creates a ready-to-run perf trace Perl
script based on existing trace data. Scripts generated by this
implementation print out all the fields for each event mentioned
in perf.data (and will detect and generate the proper scripting
code for 'flag' and 'symbolic' fields), and will additionally
generate handlers for the special 'trace_unhandled',
'trace_begin' and 'trace_end' handlers. Script authors can
simply remove the printing code to implement their own custom
event handling.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: anton@samba.org
Cc: hch@infradead.org
LKML-Reference: <1259133352-23685-4-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 85d7163..1f16495 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1888,7 +1888,7 @@
return find_field(event, name);
}
-static unsigned long long read_size(void *ptr, int size)
+unsigned long long read_size(void *ptr, int size)
{
switch (size) {
case 1:
@@ -1973,7 +1973,7 @@
"common_type");
}
-static int parse_common_pid(void *data)
+int trace_parse_common_pid(void *data)
{
static int pid_offset;
static int pid_size;
@@ -2025,6 +2025,14 @@
return event;
}
+struct event *trace_find_next_event(struct event *event)
+{
+ if (!event)
+ return event_list;
+
+ return event->next;
+}
+
static unsigned long long eval_num_arg(void *data, int size,
struct event *event, struct print_arg *arg)
{
@@ -2164,7 +2172,7 @@
{ "HRTIMER_RESTART", 1 },
};
-static unsigned long long eval_flag(const char *flag)
+unsigned long long eval_flag(const char *flag)
{
int i;
@@ -2694,7 +2702,7 @@
if (!(event->flags & EVENT_FL_ISFUNCRET))
return NULL;
- pid = parse_common_pid(next->data);
+ pid = trace_parse_common_pid(next->data);
field = find_field(event, "func");
if (!field)
die("function return does not have field func");
@@ -2980,7 +2988,7 @@
return;
}
- pid = parse_common_pid(data);
+ pid = trace_parse_common_pid(data);
if (event->flags & (EVENT_FL_ISFUNCENT | EVENT_FL_ISFUNCRET))
return pretty_print_func_graph(data, size, event, cpu,