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| author | Stephane Eranian <eranian@google.com> | 2014-10-06 10:35:32 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-10-14 17:50:55 -0300 |
| commit | 77faf4d060e3ee1fd2ff6cd39f2b2eb887100422 (patch) | |
| tree | 83cd85024f39ff4b4f3c473f509a2e92c494fd5f /tools/perf/util/map.c | |
| parent | e167f995e26249aa93708589c5eea539652351fa (diff) | |
| download | linux-77faf4d060e3ee1fd2ff6cd39f2b2eb887100422.tar.bz2 | |
perf tools: fix off-by-one error in maps
This patch fixes off-by-one errors in the management of maps.
A map is defined by start address and length as implemented by
map__new():
map__init(map, type, start, start + len, pgoff, dso);
map->start = addr;
map->end = end;
Consequently, the actual address range is [start; end[ map->end is the
first byte outside the range.
This patch fixes two bugs where upper bound checking was off-by-one.
In V2, we fix map_groups__fixup_overlappings() some more where
map->start was off-by-one as reported by Jiri.
Signed-off-by: Stephane Eranian <eranian@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20141006083532.GA4850@quad
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/map.c')
| -rw-r--r-- | tools/perf/util/map.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index b7090596ac50..186418ba18db 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -556,7 +556,7 @@ struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg, int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter) { - if (ams->addr < ams->map->start || ams->addr > ams->map->end) { + if (ams->addr < ams->map->start || ams->addr >= ams->map->end) { if (ams->map->groups == NULL) return -1; ams->map = map_groups__find(ams->map->groups, ams->map->type, @@ -664,7 +664,7 @@ int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, goto move_map; } - before->end = map->start - 1; + before->end = map->start; map_groups__insert(mg, before); if (verbose >= 2) map__fprintf(before, fp); @@ -678,7 +678,7 @@ int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, goto move_map; } - after->start = map->end + 1; + after->start = map->end; map_groups__insert(mg, after); if (verbose >= 2) map__fprintf(after, fp); |