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Fix remaining static analysis warnings

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Fix or suppress the remaining warnings generated by static analysis.
This is a necessary step before we can incorporate static analysis into
CI. Where possible, I've preferred to modify the code itself instead of
just disabling the warning with a magic comment, so that if we decide to
use different static analysis tools in the future we will be covered
against them raising similar warnings.
This commit is contained in:
Kevin Svetlitski
2023-05-12 13:17:52 -07:00
committed by Qi Wang
parent 210f0d0b2b
commit bb0333e745
12 changed files with 56 additions and 16 deletions
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17
src/ctl.c
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@@ -1314,9 +1314,18 @@ ctl_background_thread_stats_read(tsdn_t *tsdn) {
static void
ctl_refresh(tsdn_t *tsdn) {
unsigned i;
malloc_mutex_assert_owner(tsdn, &ctl_mtx);
/*
* We are guaranteed that `ctl_arenas->narenas` will not change
* underneath us since we hold `ctl_mtx` for the duration of this
* function. Unfortunately static analysis tools do not understand this,
* so we are extracting `narenas` into a local variable solely for the
* sake of exposing this information to such tools.
*/
const unsigned narenas = ctl_arenas->narenas;
assert(narenas > 0);
ctl_arena_t *ctl_sarena = arenas_i(MALLCTL_ARENAS_ALL);
VARIABLE_ARRAY(arena_t *, tarenas, ctl_arenas->narenas);
VARIABLE_ARRAY(arena_t *, tarenas, narenas);
/*
* Clear sum stats, since they will be merged into by
@@ -1324,11 +1333,11 @@ ctl_refresh(tsdn_t *tsdn) {
*/
ctl_arena_clear(ctl_sarena);
for (i = 0; i < ctl_arenas->narenas; i++) {
for (unsigned i = 0; i < narenas; i++) {
tarenas[i] = arena_get(tsdn, i, false);
}
for (i = 0; i < ctl_arenas->narenas; i++) {
for (unsigned i = 0; i < narenas; i++) {
ctl_arena_t *ctl_arena = arenas_i(i);
bool initialized = (tarenas[i] != NULL);