diff options
| author | Wang Nan | 2015-04-07 10:22:45 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2015-04-08 14:07:03 +0200 |
| commit | ba92732e9808df679ddf75c5ea1c0caae6d7dce2 (patch) | |
| tree | f00303efe3ed8cd3f2c5508d8af87db9b0137a82 /tools/perf/util/probe-event.c | |
| parent | perf evlist: Fix inverted logic in perf_mmap__empty (diff) | |
| download | kernel-qcow2-linux-ba92732e9808df679ddf75c5ea1c0caae6d7dce2.tar.gz kernel-qcow2-linux-ba92732e9808df679ddf75c5ea1c0caae6d7dce2.tar.xz kernel-qcow2-linux-ba92732e9808df679ddf75c5ea1c0caae6d7dce2.zip | |
perf kmaps: Check kmaps to make code more robust
This patch add checks in places where map__kmap is used to get kmaps
from struct kmap.
Error messages are added at map__kmap to warn invalid accessing of kmap
(for the case of !map->dso->kernel, kmap(map) does not exists at all).
Also, introduces map__kmaps() to warn uninitialized kmaps.
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: pi3orama@163.com
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1428394966-131044-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-event.c')
| -rw-r--r-- | tools/perf/util/probe-event.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 8feac0774c41..4fd49f021073 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -135,6 +135,8 @@ static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) return NULL; kmap = map__kmap(host_machine->vmlinux_maps[MAP__FUNCTION]); + if (!kmap) + return NULL; return kmap->ref_reloc_sym; } |