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perf jevents: Fix event code for events referencing std arch events

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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>
Reviewed-By: Kajol Jain<kjain@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/1602170368-11892-1-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
John Garry 2020-10-08 23:19:28 +08:00 committed by Arnaldo Carvalho de Melo
parent 2a09a84c72
commit caf7f9685d
1 changed files with 3 additions and 8 deletions
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11
tools/perf/pmu-events/jevents.c
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@ -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;
}