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authorArnaldo Carvalho de Melo <acme@redhat.com>2015-05-25 15:30:09 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-27 20:27:16 -0300
commitfacf3f0621b2e11957af1aae9085730ea78ccf85 (patch)
treed898cea7cc764ce699c7da383310ed9c28b0bf3b
parent6a2ffcddad22ead7ce75c5773e87895b91e7cca7 (diff)
downloadlinux-facf3f0621b2e11957af1aae9085730ea78ccf85.tar.gz
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 <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.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-vumvhird765id11zbx00d2r8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/builtin-annotate.c4
-rw-r--r--tools/perf/util/map.c9
-rw-r--r--tools/perf/util/symbol.c8
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);