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overflow check

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Cloud Wu
2019-04-03 11:15:33 +08:00
parent 6ab841beec
commit 8e8a92ca2d
1 changed files with 5 additions and 4 deletions
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9
3rd/lua/lstring.c
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@@ -367,11 +367,12 @@ shrstr_expandpage(int cap) {
return; return;
int osz = s->mask + 1; int osz = s->mask + 1;
int sz = osz * 2; int sz = osz * 2;
// overflow check while (sz < cap) {
if (sz <= 0) // overflow check
return; if (sz <= 0)
while (sz < cap) return;
sz = sz * 2; sz = sz * 2;
}
struct shrmap_slot * newpage = shrstr_newpage(sz); struct shrmap_slot * newpage = shrstr_newpage(sz);
rwlock_wlock(&s->lock); rwlock_wlock(&s->lock);
int succ = shrstr_allocpage(s, osz, sz, newpage); int succ = shrstr_allocpage(s, osz, sz, newpage);