perf tools: Make event__preprocess_sample parse the sample

Simplifying the tools that were using both in sequence and allowing
upcoming simplifications, such as Arun's patch to sort by cpus.

Cc: David S. Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-annotate.c

@@ -61,11 +61,9 @@ static int hists__add_entry(struct hists *self, struct addr_location *al)
 static int process_sample_event(event_t *event, struct perf_session *session)
 {
 	struct addr_location al;
+	struct sample_data data;
 
-	dump_printf("(IP, %d): %d: %#Lx\n", event->header.misc,
-		    event->ip.pid, event->ip.ip);
-
-	if (event__preprocess_sample(event, session, &al, NULL) < 0) {
+	if (event__preprocess_sample(event, session, &al, &data, NULL) < 0) {
 		pr_warning("problem processing %d event, skipping it.\n",
 			   event->header.type);
 		return -1;

tools/perf/builtin-diff.c

@@ -35,10 +35,7 @@ static int diff__process_sample_event(event_t *event, struct perf_session *sessi
 	struct addr_location al;
 	struct sample_data data = { .period = 1, };
 
-	dump_printf("(IP, %d): %d: %#Lx\n", event->header.misc,
-		    event->ip.pid, event->ip.ip);
-
-	if (event__preprocess_sample(event, session, &al, NULL) < 0) {
+	if (event__preprocess_sample(event, session, &al, &data, NULL) < 0) {
 		pr_warning("problem processing %d event, skipping it.\n",
 			   event->header.type);
 		return -1;
@@ -47,8 +44,6 @@ static int diff__process_sample_event(event_t *event, struct perf_session *sessi
 	if (al.filtered || al.sym == NULL)
 		return 0;
 
-	event__parse_sample(event, session->sample_type, &data);
-
 	if (hists__add_entry(&session->hists, &al, data.period)) {
 		pr_warning("problem incrementing symbol period, skipping event\n");
 		return -1;

tools/perf/builtin-report.c

@@ -155,31 +155,7 @@ static int process_sample_event(event_t *event, struct perf_session *session)
 	struct addr_location al;
 	struct perf_event_attr *attr;
 
-	event__parse_sample(event, session->sample_type, &data);
-
-	dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld cpu:%d\n",
-		    event->header.misc, data.pid, data.tid, data.ip,
-		    data.period, data.cpu);
-
-	if (session->sample_type & PERF_SAMPLE_CALLCHAIN) {
-		unsigned int i;
-
-		dump_printf("... chain: nr:%Lu\n", data.callchain->nr);
-
-		if (!ip_callchain__valid(data.callchain, event)) {
-			pr_debug("call-chain problem with event, "
-				 "skipping it.\n");
-			return 0;
-		}
-
-		if (dump_trace) {
-			for (i = 0; i < data.callchain->nr; i++)
-				dump_printf("..... %2d: %016Lx\n",
-					    i, data.callchain->ips[i]);
-		}
-	}
-
-	if (event__preprocess_sample(event, session, &al, NULL) < 0) {
+	if (event__preprocess_sample(event, session, &al, &data, NULL) < 0) {
 		fprintf(stderr, "problem processing %d event, skipping it.\n",
 			event->header.type);
 		return -1;

tools/perf/builtin-top.c

@@ -983,6 +983,7 @@ static void event__process_sample(const event_t *self,
 	u64 ip = self->ip.ip;
 	struct sym_entry *syme;
 	struct addr_location al;
+	struct sample_data data;
 	struct machine *machine;
 	u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 
@@ -1025,7 +1026,8 @@ static void event__process_sample(const event_t *self,
 	if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
 		exact_samples++;
 
-	if (event__preprocess_sample(self, session, &al, symbol_filter) < 0 ||
+	if (event__preprocess_sample(self, session, &al, &data,
+				     symbol_filter) < 0 ||
 	    al.filtered)
 		return;
 

tools/perf/util/callchain.c

@@ -18,7 +18,7 @@
 #include "util.h"
 #include "callchain.h"
 
-bool ip_callchain__valid(struct ip_callchain *chain, event_t *event)
+bool ip_callchain__valid(struct ip_callchain *chain, const event_t *event)
 {
 	unsigned int chain_size = event->header.size;
 	chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;

tools/perf/util/callchain.h

@@ -60,5 +60,5 @@ int register_callchain_param(struct callchain_param *param);
 int append_chain(struct callchain_node *root, struct ip_callchain *chain,
 		 struct map_symbol *syms);
 
-bool ip_callchain__valid(struct ip_callchain *chain, event_t *event);
+bool ip_callchain__valid(struct ip_callchain *chain, const event_t *event);
 #endif	/* __PERF_CALLCHAIN_H */

tools/perf/util/event.c

@@ -655,11 +655,36 @@ static void dso__calc_col_width(struct dso *self)
 }
 
 int event__preprocess_sample(const event_t *self, struct perf_session *session,
-			     struct addr_location *al, symbol_filter_t filter)
+			     struct addr_location *al, struct sample_data *data,
+			     symbol_filter_t filter)
 {
 	u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
-	struct thread *thread = perf_session__findnew(session, self->ip.pid);
+	struct thread *thread;
+
+	event__parse_sample(self, session->sample_type, data);
+
+	dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld cpu:%d\n",
+		    self->header.misc, data->pid, data->tid, data->ip,
+		    data->period, data->cpu);
+
+	if (session->sample_type & PERF_SAMPLE_CALLCHAIN) {
+		unsigned int i;
+
+		dump_printf("... chain: nr:%Lu\n", data->callchain->nr);
 
+		if (!ip_callchain__valid(data->callchain, self)) {
+			pr_debug("call-chain problem with event, "
+				 "skipping it.\n");
+			goto out_filtered;
+		}
+
+		if (dump_trace) {
+			for (i = 0; i < data->callchain->nr; i++)
+				dump_printf("..... %2d: %016Lx\n",
+					    i, data->callchain->ips[i]);
+		}
+	}
+	thread = perf_session__findnew(session, self->ip.pid);
 	if (thread == NULL)
 		return -1;
 
@@ -724,9 +749,9 @@ out_filtered:
 	return 0;
 }
 
-int event__parse_sample(event_t *event, u64 type, struct sample_data *data)
+int event__parse_sample(const event_t *event, u64 type, struct sample_data *data)
 {
-	u64 *array = event->sample.array;
+	const u64 *array = event->sample.array;
 
 	if (type & PERF_SAMPLE_IP) {
 		data->ip = event->ip.ip;

tools/perf/util/event.h

@@ -157,8 +157,9 @@ int event__process_task(event_t *self, struct perf_session *session);
 
 struct addr_location;
 int event__preprocess_sample(const event_t *self, struct perf_session *session,
-			     struct addr_location *al, symbol_filter_t filter);
-int event__parse_sample(event_t *event, u64 type, struct sample_data *data);
+			     struct addr_location *al, struct sample_data *data,
+			     symbol_filter_t filter);
+int event__parse_sample(const event_t *event, u64 type, struct sample_data *data);
 
 extern const char *event__name[];