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cache_bin: Don't let arena see empty position.

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This commit is contained in:
David Goldblatt
2020-02-27 10:22:46 -08:00
committed by David Goldblatt
parent d303f30796
commit 1b00d808d7
2 changed files with 28 additions and 12 deletions
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20
include/jemalloc/internal/cache_bin.h
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@@ -271,6 +271,13 @@ cache_bin_ptr_array_init_for_flush(cache_bin_ptr_array_t *arr, cache_bin_t *bin,
|| *arr->ptr != NULL);
}
static inline void
cache_bin_ptr_array_init_for_fill(cache_bin_ptr_array_t *arr, cache_bin_t *bin,
cache_bin_sz_t nfill, szind_t ind, cache_bin_info_t *infos) {
arr->ptr = cache_bin_empty_position_get(bin, ind, infos) - nfill;
assert(cache_bin_ncached_get(bin, ind, infos) == 0);
}
JEMALLOC_ALWAYS_INLINE void *
cache_bin_ptr_array_get(cache_bin_ptr_array_t *arr, cache_bin_sz_t n) {
return *(arr->ptr - n);
@@ -281,4 +288,17 @@ cache_bin_ptr_array_set(cache_bin_ptr_array_t *arr, cache_bin_sz_t n, void *p) {
*(arr->ptr - n) = p;
}
static inline void
cache_bin_fill_from_ptr_array(cache_bin_t *bin, cache_bin_ptr_array_t *arr,
szind_t ind, szind_t nfilled, cache_bin_info_t *infos) {
assert(cache_bin_ncached_get(bin, ind, infos) == 0);
if (nfilled < arr->n) {
void **empty_position = cache_bin_empty_position_get(bin, ind,
infos);
memmove(empty_position - nfilled, empty_position - arr->n,
nfilled * sizeof(void *));
}
cache_bin_ncached_set(bin, ind, nfilled, infos);
}
#endif /* JEMALLOC_INTERNAL_CACHE_BIN_H */