JEMALLOC_INLINE_C size_t
extent_quantize(size_t size)
{
/*
* Round down to the nearest chunk size that can actually be requested
* during normal huge allocation.
*/
return (index2size(size2index(size + 1) - 1));
}
static void
arena_large_reset_stats_cancel(arena_t *arena, size_t usize)
{
szind_t index = size2index(usize);
szind_t hindex = (index >= NBINS) ? index - NBINS : 0;
cassert(config_stats);
arena->stats.ndalloc_large--;
arena->stats.lstats[hindex].ndalloc--;
}
TEST_END
TEST_BEGIN(test_overflow)
{
size_t max_size_class;
max_size_class = get_max_size_class();
assert_u_eq(size2index(max_size_class+1), NSIZES,
"size2index() should return NSIZES on overflow");
assert_u_eq(size2index(ZU(PTRDIFF_MAX)+1), NSIZES,
"size2index() should return NSIZES on overflow");
assert_u_eq(size2index(SIZE_T_MAX), NSIZES,
"size2index() should return NSIZES on overflow");
assert_zu_eq(s2u(max_size_class+1), 0,
"s2u() should return 0 for unsupported size");
assert_zu_eq(s2u(ZU(PTRDIFF_MAX)+1), 0,
"s2u() should return 0 for unsupported size");
assert_zu_eq(s2u(SIZE_T_MAX), 0,
"s2u() should return 0 on overflow");
assert_u_eq(psz2ind(max_size_class+1), NPSIZES,
"psz2ind() should return NPSIZES on overflow");
assert_u_eq(psz2ind(ZU(PTRDIFF_MAX)+1), NPSIZES,
"psz2ind() should return NPSIZES on overflow");
assert_u_eq(psz2ind(SIZE_T_MAX), NPSIZES,
"psz2ind() should return NPSIZES on overflow");
assert_zu_eq(psz2u(max_size_class+1), 0,
"psz2u() should return 0 for unsupported size");
assert_zu_eq(psz2u(ZU(PTRDIFF_MAX)+1), 0,
"psz2u() should return 0 for unsupported size");
assert_zu_eq(psz2u(SIZE_T_MAX), 0,
"psz2u() should return 0 on overflow");
}
/*
* Round down to the nearest chunk size that can actually be requested during
* normal huge allocation.
*/
JEMALLOC_INLINE_C size_t
extent_quantize(size_t size)
{
size_t ret;
szind_t ind;
assert(size > 0);
ind = size2index(size + 1);
if (ind == 0) {
/* Avoid underflow. */
return (index2size(0));
}
ret = index2size(ind - 1);
assert(ret <= size);
return (ret);
}
static void
arena_large_dalloc_stats_update(arena_t *arena, size_t usize)
{
szind_t index, hindex;
cassert(config_stats);
if (usize < LARGE_MINCLASS)
usize = LARGE_MINCLASS;
index = size2index(usize);
hindex = (index >= NBINS) ? index - NBINS : 0;
arena->stats.ndalloc_large++;
arena->stats.allocated_large -= usize;
arena->stats.lstats[hindex].ndalloc++;
arena->stats.lstats[hindex].curlextents--;
}
