lkml.org 
[lkml]   [2017]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:perf/urgent] perf tools: Decompress kernel module when reading DSO data
Commit-ID:  1d6b3c9ba756a5134fd7ad1959acac776d17404b
Gitweb: http://git.kernel.org/tip/1d6b3c9ba756a5134fd7ad1959acac776d17404b
Author: Namhyung Kim <namhyung@kernel.org>
AuthorDate: Thu, 8 Jun 2017 16:31:05 +0900
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 8 Jun 2017 15:39:07 -0300

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>
---
tools/perf/util/dso.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index b346b8e..c63525d 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;
}
\
 
 \ /
  Last update: 2017-06-12 01:38    [W:0.116 / U:4.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site