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authorArnaldo Carvalho de Melo <acme@redhat.com>2022-01-18 09:02:43 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-01-19 13:54:57 -0300
commit9d5f0c36438eeae7566ca383b2b673179e3cc613 (patch)
treeaaad515f8dbbf4a593f3755dbcd2bde2a0f8e0fb /tools
parent0d3d237651fd7a01fe5dc501b0d170a43d8156ba (diff)
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>
Diffstat (limited to 'tools')
-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;