| From foo@baz Mon Apr 9 17:09:24 CEST 2018 |
| From: Namhyung Kim <namhyung@kernel.org> |
| Date: Thu, 8 Jun 2017 16:31:05 +0900 |
| Subject: perf tools: Decompress kernel module when reading DSO data |
| |
| From: Namhyung Kim <namhyung@kernel.org> |
| |
| |
| [ Upstream commit 1d6b3c9ba756a5134fd7ad1959acac776d17404b ] |
| |
| 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> |
| Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| tools/perf/util/dso.c | 16 ++++++++++++++++ |
| 1 file changed, 16 insertions(+) |
| |
| --- a/tools/perf/util/dso.c |
| +++ b/tools/perf/util/dso.c |
| @@ -366,7 +366,23 @@ static int __open_dso(struct dso *dso, s |
| if (!is_regular_file(name)) |
| 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; |
| } |