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authorArnaldo Carvalho de Melo <acme@redhat.com>2022-01-18 13:02:43 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-01-19 17:54:57 +0100
commit9d5f0c36438eeae7566ca383b2b673179e3cc613 (patch)
treeaaad515f8dbbf4a593f3755dbcd2bde2a0f8e0fb
parentperf evlist: No need to setup affinities when disabling events for pid targets (diff)
downloadlinux-9d5f0c36438eeae7566ca383b2b673179e3cc613.tar.xz
linux-9d5f0c36438eeae7566ca383b2b673179e3cc613.zip
perf machine: Use path__join() to compose a path instead of snprintf(dir, '/', filename)
Its more intention revealing, and if we're interested in the odd cases where this may end up truncating we can do debug checks at one centralized place. Motivation, of all the container builds, fedora rawhide started complaining of: util/machine.c: In function ‘machine__create_modules’: util/machine.c:1419:50: error: ‘%s’ directive output may be truncated writing up to 255 bytes into a region of size between 0 and 4095 [-Werror=format-truncation=] 1419 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | ^~ In file included from /usr/include/stdio.h:894, from util/branch.h:9, from util/callchain.h:8, from util/machine.c:7: In function ‘snprintf’, inlined from ‘maps__set_modules_path_dir’ at util/machine.c:1419:3, inlined from ‘machine__set_modules_path’ at util/machine.c:1473:9, inlined from ‘machine__create_modules’ at util/machine.c:1519:7: /usr/include/bits/stdio2.h:71:10: note: ‘__builtin___snprintf_chk’ output between 2 and 4352 bytes into a destination of size 4096 There are other places where we should use path__join(), but lets get rid of this one first. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Acked-by: Ian Rogers <irogers@google.com> Link: Link: https://lore.kernel.org/r/YebZKjwgfdOz0lAs@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/machine.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 3901440aeff9..f70ba56912d4 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -16,6 +16,7 @@
#include "map_symbol.h"
#include "branch.h"
#include "mem-events.h"
+#include "path.h"
#include "srcline.h"
#include "symbol.h"
#include "sort.h"
@@ -1416,7 +1417,7 @@ static int maps__set_modules_path_dir(struct maps *maps, const char *dir_name, i
struct stat st;
/*sshfs might return bad dent->d_type, so we have to stat*/
- snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
+ path__join(path, sizeof(path), dir_name, dent->d_name);
if (stat(path, &st))
continue;