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perf event: Prevent unbound event__name array access

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event__name[] is missing an entry for PERF_RECORD_FINISHED_ROUND, but we
happily access the array from the dump code.

Make event__name[] static and provide an accessor function, fix up all
callers and add the missing string.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20101207124550.432593943@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Thomas Gleixner 2010-12-07 12:48:42 +00:00 committed by Arnaldo Carvalho de Melo
parent b226a5a729
commit 3835bc00c5
4 changed files with 19 additions and 6 deletions
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12
tools/perf/util/event.c
View File

@ -7,7 +7,7 @@
#include "strlist.h"
#include "thread.h"
const char *event__name[] = {
static const char *event__name[] = {
[0] = "TOTAL",
[PERF_RECORD_MMAP] = "MMAP",
[PERF_RECORD_LOST] = "LOST",
@ -22,8 +22,18 @@ const char *event__name[] = {
[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
[PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
[PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
};
const char *event__get_event_name(unsigned int id)
{
if (id >= ARRAY_SIZE(event__name))
return "INVALID";
if (!event__name[id])
return "UNKNOWN";
return event__name[id];
}
static struct sample_data synth_sample = {
.pid = -1,
.tid = -1,

2
tools/perf/util/event.h
View File

@ -171,6 +171,6 @@ int event__preprocess_sample(const event_t *self, struct perf_session *session,
int event__parse_sample(const event_t *event, struct perf_session *session,
struct sample_data *sample);
extern const char *event__name[];
const char *event__get_event_name(unsigned int id);
#endif /* __PERF_RECORD_H */

9
tools/perf/util/hist.c
View File

@ -1168,10 +1168,13 @@ size_t hists__fprintf_nr_events(struct hists *self, FILE *fp)
size_t ret = 0;
for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
if (!event__name[i])
const char *name = event__get_event_name(i);
if (!strcmp(name, "UNKNOWN"))
continue;
ret += fprintf(fp, "%10s events: %10d\n",
event__name[i], self->stats.nr_events[i]);
ret += fprintf(fp, "%16s events: %10d\n", name,
self->stats.nr_events[i]);
}
return ret;

2
tools/perf/util/session.c
View File

@ -718,7 +718,7 @@ static int perf_session__process_event(struct perf_session *session,
if (event->header.type < PERF_RECORD_HEADER_MAX) {
dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
file_offset, event->header.size,
event__name[event->header.type]);
event__get_event_name(event->header.type));
hists__inc_nr_events(&session->hists, event->header.type);
}