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 <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Wang Nan <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
jimmycarry · Jun 8, 2017 · 1d6b3c9 · 1d6b3c9
1 parent 3c84fd5
commit 1d6b3c9
Showing 1 changed file with 16 additions and 0 deletions.
diff --git 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;
 }