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authorJiri Olsa <jolsa@kernel.org>2015-06-26 12:29:06 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-06-26 17:03:41 +0300
commit62eea464380633b88902da35bf9cbd8515289703 (patch)
treea3dd5b2c6477c6a6cd2442be7fa702aac8e58c5d /tools/perf/util/thread_map.c
parentd0cc439b30be638c3a606767e9469c300d397433 (diff)
downloadlinux-62eea464380633b88902da35bf9cbd8515289703.tar.xz
perf thread_map: Introduce thread_map__reset function
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>
Diffstat (limited to 'tools/perf/util/thread_map.c')
-rw-r--r--tools/perf/util/thread_map.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c
index 368cc58c6892..ed76c179cf4e 100644
--- a/tools/perf/util/thread_map.c
+++ b/tools/perf/util/thread_map.c
@@ -21,11 +21,26 @@ static int filter(const struct dirent *dir)
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)
{
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)