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| author | Neels Hofmeyr <neels@hofmeyr.de> | 2018-07-19 22:05:21 +0200 |
|---|---|---|
| committer | Neels Hofmeyr <nhofmeyr@sysmocom.de> | 2018-07-20 14:02:21 +0000 |
| commit | 6979c547933901b21dab28e2c08fd4cc730f9860 (patch) | |
| tree | ead7af152e02670dba1eab7cef28c8dbe99627b5 /tests/utils | |
| parent | f81d03f7dd67db4a814fea8559e4d459c7a31ec9 (diff) | |
utils_test: fix isqrt_test calculation range
Multiplying the uint16_t x by itself seems to default to be calculated in
int32_t range, while it obviously needs uint32_t. This causes sporadic
sanitizer barfs:
Testing integer square-root
utils_test.c:445:18: runtime error: signed integer overflow: 60369 * 60369 cannot be represented in type 'int'
The final result is still correct, because it is in fact interpreted as uint32_t.
Cast to uint32_t to make sure the sanitizer doesn't complain.
Related: OS#3407
Change-Id: I83c14e38deaa466d977ee43c9420534ed90f090d
Diffstat (limited to 'tests/utils')
| -rw-r--r-- | tests/utils/utils_test.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/utils/utils_test.c b/tests/utils/utils_test.c index cb4e476c..84964f57 100644 --- a/tests/utils/utils_test.c +++ b/tests/utils/utils_test.c @@ -439,7 +439,7 @@ static void isqrt_test(void) x = r * (UINT16_MAX/RAND_MAX); else x = r; - uint32_t sq = x*x; + uint32_t sq = (uint32_t)x*x; uint32_t y = osmo_isqrt32(sq); if (y != x) printf("ERROR: x=%u, sq=%u, osmo_isqrt(%u) = %u\n", x, sq, sq, y); |