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Subject[PATCH] perf jevents: Fix event code for events referencing std arch events
Date
The event code for events referencing std arch events is incorrectly
evaluated in json_events().

The issue is that je.event is evaluated properly from try_fixup(), but
later NULLified from the real_event() call, as "event" may be NULL.

Fix by setting "event" same je.event in try_fixup().

Also remove support for overwriting event code for events using std arch
events, as it is not used.

Signed-off-by: John Garry <john.garry@huawei.com>

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 99df41a9543d..e47644cab3fa 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -505,20 +505,15 @@ static char *real_event(const char *name, char *event)
}

static int
-try_fixup(const char *fn, char *arch_std, unsigned long long eventcode,
- struct json_event *je)
+try_fixup(const char *fn, char *arch_std, struct json_event *je, char **event)
{
/* try to find matching event from arch standard values */
struct event_struct *es;

list_for_each_entry(es, &arch_std_events, list) {
if (!strcmp(arch_std, es->name)) {
- if (!eventcode && es->event) {
- /* allow EventCode to be overridden */
- free(je->event);
- je->event = NULL;
- }
FOR_ALL_EVENT_STRUCT_FIELDS(TRY_FIXUP_FIELD);
+ *event = je->event;
return 0;
}
}
@@ -678,7 +673,7 @@ static int json_events(const char *fn,
* An arch standard event is referenced, so try to
* fixup any unassigned values.
*/
- err = try_fixup(fn, arch_std, eventcode, &je);
+ err = try_fixup(fn, arch_std, &je, &event);
if (err)
goto free_strings;
}
--
2.26.2
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