diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 4911734411b5334f2952ba5e11b9a4d8950b2956..3da92f18814a10545f76c2e70b2d64b57fcec345 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -440,7 +440,7 @@ static struct thread *findnew_guest_code(struct machine *machine, return NULL; /* Assume maps are set up if there are any */ - if (maps__nr_maps(thread__maps(thread))) + if (!maps__empty(thread__maps(thread))) return thread; host_thread = machine__find_thread(host_machine, -1, pid); diff --git a/tools/perf/util/maps.c b/tools/perf/util/maps.c index 439cefab112a24078c55c94ab4157d16824de33b..53aea6d2ef9367c3289f8110cf146f54d06d17b7 100644 --- a/tools/perf/util/maps.c +++ b/tools/perf/util/maps.c @@ -541,7 +541,13 @@ void maps__remove(struct maps *maps, struct map *map) bool maps__empty(struct maps *maps) { - return maps__nr_maps(maps) == 0; + bool res; + + down_read(maps__lock(maps)); + res = maps__nr_maps(maps) == 0; + up_read(maps__lock(maps)); + + return res; } bool maps__equal(struct maps *a, struct maps *b) @@ -871,7 +877,7 @@ int maps__copy_from(struct maps *dest, struct maps *parent) parent_maps_by_address = maps__maps_by_address(parent); n = maps__nr_maps(parent); - if (maps__empty(dest)) { + if (maps__nr_maps(dest) == 0) { /* No existing mappings so just copy from parent to avoid reallocs in insert. */ unsigned int nr_maps_allocated = RC_CHK_ACCESS(parent)->nr_maps_allocated; struct map **dest_maps_by_address = diff --git a/tools/perf/util/maps.h b/tools/perf/util/maps.h index 4bcba136ffe5c164b4b8d789115c7fed7c91c67a..d9aa62ed968ac43d16b67279b512c9393c8b219b 100644 --- a/tools/perf/util/maps.h +++ b/tools/perf/util/maps.h @@ -43,8 +43,8 @@ int maps__for_each_map(struct maps *maps, int (*cb)(struct map *map, void *data) void maps__remove_maps(struct maps *maps, bool (*cb)(struct map *map, void *data), void *data); struct machine *maps__machine(const struct maps *maps); -unsigned int maps__nr_maps(const struct maps *maps); -refcount_t *maps__refcnt(struct maps *maps); +unsigned int maps__nr_maps(const struct maps *maps); /* Test only. */ +refcount_t *maps__refcnt(struct maps *maps); /* Test only. */ #ifdef HAVE_LIBUNWIND_SUPPORT void *maps__addr_space(const struct maps *maps);