From facf3f0621b2e11957af1aae9085730ea78ccf85 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 25 May 2015 15:30:09 -0300 Subject: [PATCH] perf tools: Check if a map is still in use when deleting it I.e. match RB_CLEAR_NODE() with RB_EMPTY_NODE(), to check that it isn't in a rb tree at the time of its deletion. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-vumvhird765id11zbx00d2r8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-annotate.c | 4 ++++ tools/perf/util/map.c | 9 +++++---- tools/perf/util/symbol.c | 8 ++++---- 3 files changed, 13 insertions(+), 8 deletions(-) diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c index b57a027fb200..c434e1264087 100644 --- a/tools/perf/builtin-annotate.c +++ b/tools/perf/builtin-annotate.c @@ -59,6 +59,10 @@ static int perf_evsel__add_sample(struct perf_evsel *evsel, (al->sym == NULL || strcmp(ann->sym_hist_filter, al->sym->name) != 0)) { /* We're only interested in a symbol named sym_hist_filter */ + /* + * FIXME: why isn't this done in the symbol_filter when loading + * the DSO? + */ if (al->sym != NULL) { rb_erase(&al->sym->rb_node, &al->map->dso->symbols[al->map->type]); diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index 0905b07072da..4d3a92d5dff3 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -225,6 +225,7 @@ struct map *map__new2(u64 start, struct dso *dso, enum map_type type) void map__delete(struct map *map) { + BUG_ON(!RB_EMPTY_NODE(&map->rb_node)); free(map); } @@ -446,7 +447,7 @@ static void __maps__purge(struct maps *maps) struct map *pos = rb_entry(next, struct map, rb_node); next = rb_next(&pos->rb_node); - rb_erase(&pos->rb_node, root); + rb_erase_init(&pos->rb_node, root); map__delete(pos); } } @@ -456,7 +457,7 @@ static void __maps__purge_removed_maps(struct maps *maps) struct map *pos, *n; list_for_each_entry_safe(pos, n, &maps->removed_maps, node) { - list_del(&pos->node); + list_del_init(&pos->node); map__delete(pos); } } @@ -671,7 +672,7 @@ static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp map__fprintf(pos, fp); } - rb_erase(&pos->rb_node, root); + rb_erase_init(&pos->rb_node, root); /* * Now check if we need to create new maps for areas not * overlapped by the new map: @@ -782,7 +783,7 @@ void maps__insert(struct maps *maps, struct map *map) static void __maps__remove(struct maps *maps, struct map *map) { - rb_erase(&map->rb_node, &maps->entries); + rb_erase_init(&map->rb_node, &maps->entries); } void maps__remove(struct maps *maps, struct map *map) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 8aae8b6b1cee..743a9b360e3d 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -659,14 +659,14 @@ static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map, curr_map = map_groups__find(kmaps, map->type, pos->start); if (!curr_map || (filter && filter(curr_map, pos))) { - rb_erase(&pos->rb_node, root); + rb_erase_init(&pos->rb_node, root); symbol__delete(pos); } else { pos->start -= curr_map->start - curr_map->pgoff; if (pos->end) pos->end -= curr_map->start - curr_map->pgoff; if (curr_map != map) { - rb_erase(&pos->rb_node, root); + rb_erase_init(&pos->rb_node, root); symbols__insert( &curr_map->dso->symbols[curr_map->type], pos); @@ -1173,7 +1173,7 @@ static int dso__load_kcore(struct dso *dso, struct map *map, /* Add new maps */ while (!list_empty(&md.maps)) { new_map = list_entry(md.maps.next, struct map, node); - list_del(&new_map->node); + list_del_init(&new_map->node); if (new_map == replacement_map) { map->start = new_map->start; map->end = new_map->end; @@ -1211,7 +1211,7 @@ static int dso__load_kcore(struct dso *dso, struct map *map, out_err: while (!list_empty(&md.maps)) { map = list_entry(md.maps.next, struct map, node); - list_del(&map->node); + list_del_init(&map->node); map__delete(map); } close(fd); -- 2.30.2