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Fix psz/pind edge cases.

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Add an "over-size" extent heap in which to store extents which exceed
the maximum size class (plus cache-oblivious padding, if enabled).
Remove psz2ind_clamp() and use psz2ind() instead so that trying to
allocate the maximum size class can in principle succeed.  In practice,
this allows assertions to hold so that OOM errors can be successfully
generated.
This commit is contained in:
Jason Evans 2016-11-03 21:18:50 -07:00
parent 8dd5ea87ca
commit ea9961acdb
7 changed files with 39 additions and 53 deletions
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3
src/jemalloc.c
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@ -83,7 +83,7 @@ enum {
static uint8_t malloc_slow_flags;
JEMALLOC_ALIGNED(CACHELINE)
const size_t pind2sz_tab[NPSIZES] = {
const size_t pind2sz_tab[NPSIZES+1] = {
#define PSZ_yes(lg_grp, ndelta, lg_delta) \
(((ZU(1)<<lg_grp) + (ZU(ndelta)<<lg_delta))),
#define PSZ_no(lg_grp, ndelta, lg_delta)
@ -93,6 +93,7 @@ const size_t pind2sz_tab[NPSIZES] = {
#undef PSZ_yes
#undef PSZ_no
#undef SC
(LARGE_MAXCLASS + PAGE)
};
JEMALLOC_ALIGNED(CACHELINE)