Commit 66671d00 authored Aug 18, 2015 by Arnaldo Carvalho de Melo

perf tools: Initialize reference counts in map__clone()

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>

parent 4b715d24

tools/perf/util/map.c

+11 −2

Original line number	Diff line number	Diff line
		@@ -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)