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sz: Support 0 size in size2index lookup/compute

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This commit is contained in:
Dave Watson 2018-10-08 10:11:04 -07:00
parent 2b112ea593
commit 4edbb7c64c
2 changed files with 14 additions and 6 deletions
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7
src/sz.c
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@ -37,18 +37,19 @@ sz_boot_index2size_tab(const sc_data_t *sc_data) {
* the smallest interval for which the result can change.
*/
JEMALLOC_ALIGNED(CACHELINE)
uint8_t sz_size2index_tab[SC_LOOKUP_MAXCLASS >> SC_LG_TINY_MIN];
uint8_t sz_size2index_tab[(SC_LOOKUP_MAXCLASS >> SC_LG_TINY_MIN) + 1];
static void
sz_boot_size2index_tab(const sc_data_t *sc_data) {
size_t dst_max = (SC_LOOKUP_MAXCLASS >> SC_LG_TINY_MIN);
size_t dst_max = (SC_LOOKUP_MAXCLASS >> SC_LG_TINY_MIN) + 1;
size_t dst_ind = 0;
for (unsigned sc_ind = 0; sc_ind < SC_NSIZES && dst_ind < dst_max;
sc_ind++) {
const sc_t *sc = &sc_data->sc[sc_ind];
size_t sz = (ZU(1) << sc->lg_base)
+ (ZU(sc->ndelta) << sc->lg_delta);
size_t max_ind = ((sz - 1) >> SC_LG_TINY_MIN);
size_t max_ind = ((sz + (ZU(1) << SC_LG_TINY_MIN) - 1)
>> SC_LG_TINY_MIN);
for (; dst_ind <= max_ind && dst_ind < dst_max; dst_ind++) {
sz_size2index_tab[dst_ind] = sc_ind;
}