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MDEV-22387: Do not violate __attribute__((nonnull))

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This follows up commit
commit 94a520ddbe and
commit 7c5519c12d.

After these changes, the default test suites on a
cmake -DWITH_UBSAN=ON build no longer fail due to passing
null pointers as parameters that are declared to never be null,
but plenty of other runtime errors remain.
This commit is contained in:
Marko Mäkelä
2020-11-02 14:19:21 +02:00
parent d2fab68667
commit 8036d0a359
22 changed files with 89 additions and 48 deletions
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3
sql/sql_class.cc
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@ -4548,7 +4548,8 @@ extern "C" size_t thd_query_safe(MYSQL_THD thd, char *buf, size_t buflen)
if (!mysql_mutex_trylock(&thd->LOCK_thd_data))
{
len= MY_MIN(buflen - 1, thd->query_length());
memcpy(buf, thd->query(), len);
if (len)
memcpy(buf, thd->query(), len);
mysql_mutex_unlock(&thd->LOCK_thd_data);
}
buf[len]= '\0';