diff options
| author | Ian Rogers <irogers@google.com> | 2023-06-23 07:31:07 +0300 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2023-06-23 08:13:13 +0300 |
| commit | 33941dbd14da4eac40a26ac5fd5f84e1842ffc3a (patch) | |
| tree | b25907104931d783a499a2df67375adc16379cde /tools/perf | |
| parent | e4ef3ef1bc0a3d2535427da78b8095ef657eb474 (diff) | |
| download | linux-33941dbd14da4eac40a26ac5fd5f84e1842ffc3a.tar.xz | |
perf unwind: Fix map reference counts
The result of thread__find_map is the map in the passed in
addr_location. Calling addr_location__exit puts that map and so copies
need to do a map__get. Add in the corresponding map__puts.
v2. Add missing map__put when dso is missing.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/r/20230623043107.4077510-1-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/unwind-libunwind-local.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c index 36bf5100bad2..ebfde537b99b 100644 --- a/tools/perf/util/unwind-libunwind-local.c +++ b/tools/perf/util/unwind-libunwind-local.c @@ -419,7 +419,8 @@ static struct map *find_map(unw_word_t ip, struct unwind_info *ui) struct map *ret; addr_location__init(&al); - ret = thread__find_map(ui->thread, PERF_RECORD_MISC_USER, ip, &al); + thread__find_map(ui->thread, PERF_RECORD_MISC_USER, ip, &al); + ret = map__get(al.map); addr_location__exit(&al); return ret; } @@ -440,8 +441,10 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi, return -EINVAL; dso = map__dso(map); - if (!dso) + if (!dso) { + map__put(map); return -EINVAL; + } pr_debug("unwind: find_proc_info dso %s\n", dso->name); @@ -476,11 +479,11 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi, memset(&di, 0, sizeof(di)); if (dwarf_find_debug_frame(0, &di, ip, base, symfile, start, map__end(map))) - return dwarf_search_unwind_table(as, ip, &di, pi, - need_unwind_info, arg); + ret = dwarf_search_unwind_table(as, ip, &di, pi, + need_unwind_info, arg); } #endif - + map__put(map); return ret; } @@ -534,12 +537,14 @@ static int access_dso_mem(struct unwind_info *ui, unw_word_t addr, dso = map__dso(map); - if (!dso) + if (!dso) { + map__put(map); return -1; + } size = dso__data_read_addr(dso, map, ui->machine, addr, (u8 *) data, sizeof(*data)); - + map__put(map); return !(size == sizeof(*data)); } |