perf c2c: Support AUX trace

This patch adds the AUX callbacks in session structure, so support AUX
trace for "perf c2c" tool; make itrace memory event as default for "perf
c2c", this tells the AUX trace decoder to synthesize samples and can be
used for statistics.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20201106094853.21082-9-leo.yan@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-c2c.c

@@ -369,6 +369,10 @@ static struct perf_c2c c2c = {
 		.exit		= perf_event__process_exit,
 		.fork		= perf_event__process_fork,
 		.lost		= perf_event__process_lost,
+		.attr		= perf_event__process_attr,
+		.auxtrace_info  = perf_event__process_auxtrace_info,
+		.auxtrace       = perf_event__process_auxtrace,
+		.auxtrace_error = perf_event__process_auxtrace_error,
 		.ordered_events	= true,
 		.ordering_requires_timestamps = true,
 	},
@@ -2678,6 +2682,12 @@ static int setup_coalesce(const char *coalesce, bool no_source)
 
 static int perf_c2c__report(int argc, const char **argv)
 {
+	struct itrace_synth_opts itrace_synth_opts = {
+		.set = true,
+		.mem = true,	/* Only enable memory event */
+		.default_no_sample = true,
+	};
+
 	struct perf_session *session;
 	struct ui_progress prog;
 	struct perf_data data = {
@@ -2757,6 +2767,8 @@ static int perf_c2c__report(int argc, const char **argv)
 		goto out;
 	}
 
+	session->itrace_synth_opts = &itrace_synth_opts;
+
 	err = setup_nodes(session);
 	if (err) {
 		pr_err("Failed setup nodes\n");