diff options
Diffstat (limited to 'tools/perf/util/unwind-libunwind.c')
| -rw-r--r-- | tools/perf/util/unwind-libunwind.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c index 3c258a0e4092..ee7e372297e5 100644 --- a/tools/perf/util/unwind-libunwind.c +++ b/tools/perf/util/unwind-libunwind.c @@ -319,6 +319,15 @@ static struct map *find_map(unw_word_t ip, struct unwind_info *ui) thread__find_addr_map(ui->thread, PERF_RECORD_MISC_USER, MAP__FUNCTION, ip, &al); + if (!al.map) { + /* + * We've seen cases (softice) where DWARF unwinder went + * through non executable mmaps, which we need to lookup + * in MAP__VARIABLE tree. + */ + thread__find_addr_map(ui->thread, PERF_RECORD_MISC_USER, + MAP__VARIABLE, ip, &al); + } return al.map; } @@ -416,20 +425,19 @@ get_proc_name(unw_addr_space_t __maybe_unused as, static int access_dso_mem(struct unwind_info *ui, unw_word_t addr, unw_word_t *data) { - struct addr_location al; + struct map *map; ssize_t size; - thread__find_addr_map(ui->thread, PERF_RECORD_MISC_USER, - MAP__FUNCTION, addr, &al); - if (!al.map) { + map = find_map(addr, ui); + if (!map) { pr_debug("unwind: no map for %lx\n", (unsigned long)addr); return -1; } - if (!al.map->dso) + if (!map->dso) return -1; - size = dso__data_read_addr(al.map->dso, al.map, ui->machine, + size = dso__data_read_addr(map->dso, map, ui->machine, addr, (u8 *) data, sizeof(*data)); return !(size == sizeof(*data)); |