Now that we have a proper snprintf() implementation, make sure truncation is handled properly.
Signed-off-by: Thomas Weißschuh thomas.weissschuh@linutronix.de --- tools/testing/selftests/nolibc/nolibc-test.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index a45fded42c14110c97c4c899d04dba8e676dfd49..0a891c40e2afbb398ae39b43dbe977efdab042e2 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -1290,7 +1290,8 @@ static int expect_vfprintf(int llen, int c, const char *expected, const char *fm
va_start(args, fmt); - w = vsnprintf(buf, sizeof(buf), fmt, args); + /* Only allow writing 21 bytes, to test truncation */ + w = vsnprintf(buf, 21, fmt, args); va_end(args);
if (w != c) { @@ -1396,6 +1397,7 @@ static int run_printf(int min, int max) CASE_TEST(pointer); EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break; CASE_TEST(uintmax_t); EXPECT_VFPRINTF(20, "18446744073709551615", "%ju", 0xffffffffffffffffULL); break; CASE_TEST(intmax_t); EXPECT_VFPRINTF(20, "-9223372036854775807", "%jd", 0x8000000000000001LL); break; + CASE_TEST(truncation); EXPECT_VFPRINTF(25, "01234567890123456789", "%s", "0123456789012345678901234"); break; CASE_TEST(scanf); EXPECT_ZR(1, test_scanf()); break; case __LINE__: return ret; /* must be last */