perf script: Fix named threads support

Commit 73994dc broke named thread support in perf-script. The thread
struct in al is the main thread for a multithreaded process. The thread
struct used for analysis (e.g., dumping events) should be the specific
thread for the sample.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Feng Tang <feng.tang@intel.com>
Link: http://lkml.kernel.org/r/1374185175-28272-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-script.c

@@ -397,10 +397,10 @@ static void print_sample_bts(union perf_event *event,
 
 static void process_event(union perf_event *event, struct perf_sample *sample,
 			  struct perf_evsel *evsel, struct machine *machine,
-			  struct addr_location *al)
+			  struct thread *thread,
+			  struct addr_location *al __maybe_unused)
 {
 	struct perf_event_attr *attr = &evsel->attr;
-	struct thread *thread = al->thread;
 
 	if (output[attr->type].fields == 0)
 		return;
@@ -511,7 +511,7 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
 	if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
 		return 0;
 
-	scripting_ops->process_event(event, sample, evsel, machine, &al);
+	scripting_ops->process_event(event, sample, evsel, machine, thread, &al);
 
 	evsel->hists.stats.total_period += sample->period;
 	return 0;

tools/perf/util/scripting-engines/trace-event-perl.c

@@ -261,6 +261,7 @@ static void perl_process_tracepoint(union perf_event *perf_event __maybe_unused,
 				    struct perf_sample *sample,
 				    struct perf_evsel *evsel,
 				    struct machine *machine __maybe_unused,
+				    struct thread *thread,
 					struct addr_location *al)
 {
 	struct format_field *field;
@@ -272,7 +273,6 @@ static void perl_process_tracepoint(union perf_event *perf_event __maybe_unused,
 	int cpu = sample->cpu;
 	void *data = sample->raw_data;
 	unsigned long long nsecs = sample->time;
-	struct thread *thread = al->thread;
 	char *comm = thread->comm;
 
 	dSP;
@@ -351,6 +351,7 @@ static void perl_process_event_generic(union perf_event *event,
 				       struct perf_sample *sample,
 				       struct perf_evsel *evsel,
 				       struct machine *machine __maybe_unused,
+				       struct thread *thread __maybe_unused,
 					   struct addr_location *al __maybe_unused)
 {
 	dSP;
@@ -377,10 +378,11 @@ static void perl_process_event(union perf_event *event,
 			       struct perf_sample *sample,
 			       struct perf_evsel *evsel,
 			       struct machine *machine,
+			       struct thread *thread,
 				   struct addr_location *al)
 {
-	perl_process_tracepoint(event, sample, evsel, machine, al);
+	perl_process_tracepoint(event, sample, evsel, machine, thread, al);
-	perl_process_event_generic(event, sample, evsel, machine, al);
+	perl_process_event_generic(event, sample, evsel, machine, thread, al);
 }
 
 static void run_start_sub(void)

tools/perf/util/scripting-engines/trace-event-python.c

@@ -225,6 +225,7 @@ static void python_process_tracepoint(union perf_event *perf_event
 				 struct perf_sample *sample,
 				 struct perf_evsel *evsel,
 				 struct machine *machine __maybe_unused,
+				 struct thread *thread,
 				 struct addr_location *al)
 {
 	PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
@@ -238,7 +239,6 @@ static void python_process_tracepoint(union perf_event *perf_event
 	int cpu = sample->cpu;
 	void *data = sample->raw_data;
 	unsigned long long nsecs = sample->time;
-	struct thread *thread = al->thread;
 	char *comm = thread->comm;
 
 	t = PyTuple_New(MAX_FIELDS);
@@ -345,12 +345,12 @@ static void python_process_general_event(union perf_event *perf_event
 					 struct perf_sample *sample,
 					 struct perf_evsel *evsel,
 					 struct machine *machine __maybe_unused,
+					 struct thread *thread,
 					 struct addr_location *al)
 {
 	PyObject *handler, *retval, *t, *dict;
 	static char handler_name[64];
 	unsigned n = 0;
-	struct thread *thread = al->thread;
 
 	/*
 	 * Use the MAX_FIELDS to make the function expandable, though
@@ -404,17 +404,18 @@ static void python_process_event(union perf_event *perf_event,
 				 struct perf_sample *sample,
 				 struct perf_evsel *evsel,
 				 struct machine *machine,
+				 struct thread *thread,
 				 struct addr_location *al)
 {
 	switch (evsel->attr.type) {
 	case PERF_TYPE_TRACEPOINT:
 		python_process_tracepoint(perf_event, sample, evsel,
-					  machine, al);
+					  machine, thread, al);
 		break;
 	/* Reserve for future process_hw/sw/raw APIs */
 	default:
 		python_process_general_event(perf_event, sample, evsel,
-					     machine, al);
+					     machine, thread, al);
 	}
 }
 

tools/perf/util/trace-event-scripting.c

@@ -39,6 +39,7 @@ static void process_event_unsupported(union perf_event *event __maybe_unused,
 				      struct perf_sample *sample __maybe_unused,
 				      struct perf_evsel *evsel __maybe_unused,
 				      struct machine *machine __maybe_unused,
+				      struct thread *thread __maybe_unused,
 					  struct addr_location *al __maybe_unused)
 {
 }

tools/perf/util/trace-event.h

@@ -9,6 +9,7 @@ struct machine;
 struct perf_sample;
 union perf_event;
 struct perf_tool;
+struct thread;
 
 extern struct pevent *perf_pevent;
 
@@ -68,6 +69,7 @@ struct scripting_ops {
 			       struct perf_sample *sample,
 			       struct perf_evsel *evsel,
 			       struct machine *machine,
+			       struct thread *thread,
 				   struct addr_location *al);
 	int (*generate_script) (struct pevent *pevent, const char *outfile);
 };