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perf tools: Initialize reference counts in map__clone()

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Map clone was written before we introduced reference counts for
maps and dsos, so all that was needed was just a copy and then we
would insert it into the new map_groups instance.

Fix it by, after copying, initializing the map->refcnt, grabbing
a struct dso refcount and resetting pointers that may be used
to determine if a map, when deleted, is in a rb_tree.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-pd4mr80o5b9gvk50iineacec@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-08-18 15:19:50 -03:00
parent 4b715d24f4
commit 66671d001a
1 changed files with 11 additions and 2 deletions
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13
tools/perf/util/map.c
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@ -348,9 +348,18 @@ struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
return dso__find_symbol_by_name(map->dso, map->type, name); return dso__find_symbol_by_name(map->dso, map->type, name);
} }
struct map *map__clone(struct map *map) struct map *map__clone(struct map *from)
{ {
return memdup(map, sizeof(*map)); struct map *map = memdup(from, sizeof(*map));
if (map != NULL) {
atomic_set(&map->refcnt, 1);
RB_CLEAR_NODE(&map->rb_node);
dso__get(map->dso);
map->groups = NULL;
}
return map;
} }
int map__overlap(struct map *l, struct map *r) int map__overlap(struct map *l, struct map *r)