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SubjectRe: [PATCH 5/9] perf utils: add support for arch standard events
On Wed, Feb 07, 2018 at 01:45:00AM +0800, John Garry wrote:

SNIP

> /* Call func with each event in the json file */
> int json_events(const char *fn,
> int (*func)(void *data, char *name, char *event, char *desc,
> @@ -442,6 +550,7 @@ int json_events(const char *fn,
> char *metric_expr = NULL;
> char *metric_name = NULL;
> char *metric_group = NULL;
> + char *arch_std = NULL;
> unsigned long long eventcode = 0;
> struct msrmap *msr = NULL;
> jsmntok_t *msrval = NULL;
> @@ -527,6 +636,10 @@ int json_events(const char *fn,
> addfield(map, &metric_expr, "", "", val);
> for (s = metric_expr; *s; s++)
> *s = tolower(*s);
> + } else if (json_streq(map, field, "ArchStdEvent")) {
> + addfield(map, &arch_std, "", "", val);
> + for (s = arch_std; *s; s++)
> + *s = tolower(*s);
> }
> /* ignore unknown fields */
> }
> @@ -538,7 +651,7 @@ int json_events(const char *fn,
> addfield(map, &extra_desc, " ",
> "(Precise event)", NULL);
> }
> - snprintf(buf, sizeof buf, "event=%#llx", eventcode);
> + snprintf(buf, sizeof(buf), "%s%#llx", EVENT_PREFIX, eventcode);
> addfield(map, &event, ",", buf, NULL);
> if (desc && extra_desc)
> addfield(map, &desc, " ", extra_desc, NULL);
> @@ -550,9 +663,21 @@ int json_events(const char *fn,
> addfield(map, &event, ",", msr->pname, msrval);
> if (name)
> fixname(name);
> -
> - err = func(data, name, real_event(name, event), desc, long_desc,
> - pmu, unit, perpkg, metric_expr, metric_name, metric_group);
> + err = 0;
> + if (arch_std) {
> + /*
> + * An arch standard event is referenced, so try to
> + * fixup any unassigned values.
> + */
> + err = try_fixup(fn, arch_std, &event, &desc, &name,
> + &long_desc, &pmu, &filter, &perpkg,
> + &unit, &metric_expr, &metric_name,
> + &metric_group);
> + }
> + if (!err)
> + err = func(data, name, real_event(name, event), desc,
> + long_desc, pmu, unit, perpkg, metric_expr,
> + metric_name, metric_group);
> free(event);
> free(desc);
> free(name);
> @@ -565,6 +690,7 @@ int json_events(const char *fn,
> free(metric_expr);
> free(metric_name);
> free(metric_group);
> +

should you call free(arch_std) in here?

jirka

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