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perf thread_map: Introduce thread_map__reset function

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We need to reset newly allocated 'struct thread_map_data' entries,
because we will introduce new comm memeber, which will get set later or
not at all.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1435310967-14570-2-git-send-email-jolsa@kernel.org
[ Use sizeof(map->map[0]) to be independent of the array entry type ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2015-06-26 11:29:06 +02:00 committed by Arnaldo Carvalho de Melo
parent d0cc439b30
commit 62eea46438
1 changed files with 16 additions and 1 deletions
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17
tools/perf/util/thread_map.c
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@ -21,11 +21,26 @@ static int filter(const struct dirent *dir)
return 1; return 1;
} }
static void thread_map__reset(struct thread_map *map, int start, int nr)
{
size_t size = (nr - start) * sizeof(map->map[0]);
memset(&map->map[start], 0, size);
}
static struct thread_map *thread_map__realloc(struct thread_map *map, int nr) static struct thread_map *thread_map__realloc(struct thread_map *map, int nr)
{ {
size_t size = sizeof(*map) + sizeof(map->map[0]) * nr; size_t size = sizeof(*map) + sizeof(map->map[0]) * nr;
int start = map ? map->nr : 0;
return realloc(map, size); map = realloc(map, size);
/*
* We only realloc to add more items, let's reset new items.
*/
if (map)
thread_map__reset(map, start, nr);
return map;
} }
#define thread_map__alloc(__nr) thread_map__realloc(NULL, __nr) #define thread_map__alloc(__nr) thread_map__realloc(NULL, __nr)