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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 <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-08-18 15:19:50 -03:00
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);
}
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)