perf tools: Decompress kernel module when reading DSO data

Currently perf decompresses kernel modules when loading the symbol table
but it missed to do it when reading raw data.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170608073109.30699-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index b346b8eba65c..c63525d845c5 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -475,7 +475,23 @@ static int __open_dso(struct dso *dso, struct machine *machine)
                 return -EINVAL;
         }
 
+        if (dso__needs_decompress(dso)) {
+                char newpath[KMOD_DECOMP_LEN];
+                size_t len = sizeof(newpath);
+
+                if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) {
+                        free(name);
+                        return -dso->load_errno;
+                }
+
+                strcpy(name, newpath);
+        }
+
         fd = do_open(name);
+
+        if (dso__needs_decompress(dso))
+                unlink(name);
+
         free(name);
         return fd;
 }