perf mem-info: Add reference count checking

Add reference count checking and switch 'struct mem_info' usage to use
accessor functions.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ben Gainey <ben.gainey@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Li Dong <lidong@vivo.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Paran Lee <p4ranlee@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sun Haiyong <sunhaiyong@loongson.cn>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Yicong Yang <yangyicong@hisilicon.com>
Link: https://lore.kernel.org/r/20240507183545.1236093-8-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index c77fe08a0545..fb00f3ad6815 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -721,15 +721,20 @@ static void set_sample_read_in_dict(PyObject *dict_sample,
 }
 
 static void set_sample_datasrc_in_dict(PyObject *dict,
-				       struct perf_sample *sample)
+				      struct perf_sample *sample)
 {
-	struct mem_info mi = { .data_src.val = sample->data_src };
+	struct mem_info *mi = mem_info__new();
 	char decode[100];
 
+	if (!mi)
+		Py_FatalError("couldn't create mem-info");
+
 	pydict_set_item_string_decref(dict, "datasrc",
 			PyLong_FromUnsignedLongLong(sample->data_src));
 
-	perf_script__meminfo_scnprintf(decode, 100, &mi);
+	mem_info__data_src(mi)->val = sample->data_src;
+	perf_script__meminfo_scnprintf(decode, 100, mi);
+	mem_info__put(mi);
 
 	pydict_set_item_string_decref(dict, "datasrc_decode",
 			_PyUnicode_FromString(decode));