diff options
Diffstat (limited to 'examples/redis-unstable/deps/jemalloc/src/arena.c')
| -rw-r--r-- | examples/redis-unstable/deps/jemalloc/src/arena.c | 1891 |
1 files changed, 0 insertions, 1891 deletions
diff --git a/examples/redis-unstable/deps/jemalloc/src/arena.c b/examples/redis-unstable/deps/jemalloc/src/arena.c deleted file mode 100644 index 857b27c..0000000 --- a/examples/redis-unstable/deps/jemalloc/src/arena.c +++ /dev/null @@ -1,1891 +0,0 @@ -#include "jemalloc/internal/jemalloc_preamble.h" -#include "jemalloc/internal/jemalloc_internal_includes.h" - -#include "jemalloc/internal/assert.h" -#include "jemalloc/internal/decay.h" -#include "jemalloc/internal/ehooks.h" -#include "jemalloc/internal/extent_dss.h" -#include "jemalloc/internal/extent_mmap.h" -#include "jemalloc/internal/san.h" -#include "jemalloc/internal/mutex.h" -#include "jemalloc/internal/rtree.h" -#include "jemalloc/internal/safety_check.h" -#include "jemalloc/internal/util.h" - -JEMALLOC_DIAGNOSTIC_DISABLE_SPURIOUS - -/******************************************************************************/ -/* Data. */ - -/* - * Define names for both unininitialized and initialized phases, so that - * options and mallctl processing are straightforward. - */ -const char *percpu_arena_mode_names[] = { - "percpu", - "phycpu", - "disabled", - "percpu", - "phycpu" -}; -percpu_arena_mode_t opt_percpu_arena = PERCPU_ARENA_DEFAULT; - -ssize_t opt_dirty_decay_ms = DIRTY_DECAY_MS_DEFAULT; -ssize_t opt_muzzy_decay_ms = MUZZY_DECAY_MS_DEFAULT; - -static atomic_zd_t dirty_decay_ms_default; -static atomic_zd_t muzzy_decay_ms_default; - -emap_t arena_emap_global; -pa_central_t arena_pa_central_global; - -div_info_t arena_binind_div_info[SC_NBINS]; - -size_t opt_oversize_threshold = OVERSIZE_THRESHOLD_DEFAULT; -size_t oversize_threshold = OVERSIZE_THRESHOLD_DEFAULT; - -uint32_t arena_bin_offsets[SC_NBINS]; -static unsigned nbins_total; - -static unsigned huge_arena_ind; - -const arena_config_t arena_config_default = { - /* .extent_hooks = */ (extent_hooks_t *)&ehooks_default_extent_hooks, - /* .metadata_use_hooks = */ true, -}; - -/******************************************************************************/ -/* - * Function prototypes for static functions that are referenced prior to - * definition. - */ - -static bool arena_decay_dirty(tsdn_t *tsdn, arena_t *arena, - bool is_background_thread, bool all); -static void arena_bin_lower_slab(tsdn_t *tsdn, arena_t *arena, edata_t *slab, - bin_t *bin); -static void -arena_maybe_do_deferred_work(tsdn_t *tsdn, arena_t *arena, decay_t *decay, - size_t npages_new); - -/******************************************************************************/ - -void -arena_basic_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads, - const char **dss, ssize_t *dirty_decay_ms, ssize_t *muzzy_decay_ms, - size_t *nactive, size_t *ndirty, size_t *nmuzzy) { - *nthreads += arena_nthreads_get(arena, false); - *dss = dss_prec_names[arena_dss_prec_get(arena)]; - *dirty_decay_ms = arena_decay_ms_get(arena, extent_state_dirty); - *muzzy_decay_ms = arena_decay_ms_get(arena, extent_state_muzzy); - pa_shard_basic_stats_merge(&arena->pa_shard, nactive, ndirty, nmuzzy); -} - -void -arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads, - const char **dss, ssize_t *dirty_decay_ms, ssize_t *muzzy_decay_ms, - size_t *nactive, size_t *ndirty, size_t *nmuzzy, arena_stats_t *astats, - bin_stats_data_t *bstats, arena_stats_large_t *lstats, - pac_estats_t *estats, hpa_shard_stats_t *hpastats, sec_stats_t *secstats) { - cassert(config_stats); - - arena_basic_stats_merge(tsdn, arena, nthreads, dss, dirty_decay_ms, - muzzy_decay_ms, nactive, ndirty, nmuzzy); - - size_t base_allocated, base_resident, base_mapped, metadata_thp; - base_stats_get(tsdn, arena->base, &base_allocated, &base_resident, - &base_mapped, &metadata_thp); - size_t pac_mapped_sz = pac_mapped(&arena->pa_shard.pac); - astats->mapped += base_mapped + pac_mapped_sz; - astats->resident += base_resident; - - LOCKEDINT_MTX_LOCK(tsdn, arena->stats.mtx); - - astats->base += base_allocated; - atomic_load_add_store_zu(&astats->internal, arena_internal_get(arena)); - astats->metadata_thp += metadata_thp; - - for (szind_t i = 0; i < SC_NSIZES - SC_NBINS; i++) { - uint64_t nmalloc = locked_read_u64(tsdn, - LOCKEDINT_MTX(arena->stats.mtx), - &arena->stats.lstats[i].nmalloc); - locked_inc_u64_unsynchronized(&lstats[i].nmalloc, nmalloc); - astats->nmalloc_large += nmalloc; - - uint64_t ndalloc = locked_read_u64(tsdn, - LOCKEDINT_MTX(arena->stats.mtx), - &arena->stats.lstats[i].ndalloc); - locked_inc_u64_unsynchronized(&lstats[i].ndalloc, ndalloc); - astats->ndalloc_large += ndalloc; - - uint64_t nrequests = locked_read_u64(tsdn, - LOCKEDINT_MTX(arena->stats.mtx), - &arena->stats.lstats[i].nrequests); - locked_inc_u64_unsynchronized(&lstats[i].nrequests, - nmalloc + nrequests); - astats->nrequests_large += nmalloc + nrequests; - - /* nfill == nmalloc for large currently. */ - locked_inc_u64_unsynchronized(&lstats[i].nfills, nmalloc); - astats->nfills_large += nmalloc; - - uint64_t nflush = locked_read_u64(tsdn, - LOCKEDINT_MTX(arena->stats.mtx), - &arena->stats.lstats[i].nflushes); - locked_inc_u64_unsynchronized(&lstats[i].nflushes, nflush); - astats->nflushes_large += nflush; - - assert(nmalloc >= ndalloc); - assert(nmalloc - ndalloc <= SIZE_T_MAX); - size_t curlextents = (size_t)(nmalloc - ndalloc); - lstats[i].curlextents += curlextents; - astats->allocated_large += - curlextents * sz_index2size(SC_NBINS + i); - } - - pa_shard_stats_merge(tsdn, &arena->pa_shard, &astats->pa_shard_stats, - estats, hpastats, secstats, &astats->resident); - - LOCKEDINT_MTX_UNLOCK(tsdn, arena->stats.mtx); - - /* Currently cached bytes and sanitizer-stashed bytes in tcache. */ - astats->tcache_bytes = 0; - astats->tcache_stashed_bytes = 0; - malloc_mutex_lock(tsdn, &arena->tcache_ql_mtx); - cache_bin_array_descriptor_t *descriptor; - ql_foreach(descriptor, &arena->cache_bin_array_descriptor_ql, link) { - for (szind_t i = 0; i < nhbins; i++) { - cache_bin_t *cache_bin = &descriptor->bins[i]; - cache_bin_sz_t ncached, nstashed; - cache_bin_nitems_get_remote(cache_bin, - &tcache_bin_info[i], &ncached, &nstashed); - - astats->tcache_bytes += ncached * sz_index2size(i); - astats->tcache_stashed_bytes += nstashed * - sz_index2size(i); - } - } - malloc_mutex_prof_read(tsdn, - &astats->mutex_prof_data[arena_prof_mutex_tcache_list], - &arena->tcache_ql_mtx); - malloc_mutex_unlock(tsdn, &arena->tcache_ql_mtx); - -#define READ_ARENA_MUTEX_PROF_DATA(mtx, ind) \ - malloc_mutex_lock(tsdn, &arena->mtx); \ - malloc_mutex_prof_read(tsdn, &astats->mutex_prof_data[ind], \ - &arena->mtx); \ - malloc_mutex_unlock(tsdn, &arena->mtx); - - /* Gather per arena mutex profiling data. */ - READ_ARENA_MUTEX_PROF_DATA(large_mtx, arena_prof_mutex_large); - READ_ARENA_MUTEX_PROF_DATA(base->mtx, - arena_prof_mutex_base); -#undef READ_ARENA_MUTEX_PROF_DATA - pa_shard_mtx_stats_read(tsdn, &arena->pa_shard, - astats->mutex_prof_data); - - nstime_copy(&astats->uptime, &arena->create_time); - nstime_update(&astats->uptime); - nstime_subtract(&astats->uptime, &arena->create_time); - - for (szind_t i = 0; i < SC_NBINS; i++) { - for (unsigned j = 0; j < bin_infos[i].n_shards; j++) { - bin_stats_merge(tsdn, &bstats[i], - arena_get_bin(arena, i, j)); - } - } -} - -static void -arena_background_thread_inactivity_check(tsdn_t *tsdn, arena_t *arena, - bool is_background_thread) { - if (!background_thread_enabled() || is_background_thread) { - return; - } - background_thread_info_t *info = - arena_background_thread_info_get(arena); - if (background_thread_indefinite_sleep(info)) { - arena_maybe_do_deferred_work(tsdn, arena, - &arena->pa_shard.pac.decay_dirty, 0); - } -} - -/* - * React to deferred work generated by a PAI function. - */ -void arena_handle_deferred_work(tsdn_t *tsdn, arena_t *arena) { - witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn), - WITNESS_RANK_CORE, 0); - - if (decay_immediately(&arena->pa_shard.pac.decay_dirty)) { - arena_decay_dirty(tsdn, arena, false, true); - } - arena_background_thread_inactivity_check(tsdn, arena, false); -} - -static void * -arena_slab_reg_alloc(edata_t *slab, const bin_info_t *bin_info) { - void *ret; - slab_data_t *slab_data = edata_slab_data_get(slab); - size_t regind; - - assert(edata_nfree_get(slab) > 0); - assert(!bitmap_full(slab_data->bitmap, &bin_info->bitmap_info)); - - regind = bitmap_sfu(slab_data->bitmap, &bin_info->bitmap_info); - ret = (void *)((uintptr_t)edata_addr_get(slab) + - (uintptr_t)(bin_info->reg_size * regind)); - edata_nfree_dec(slab); - return ret; -} - -static void -arena_slab_reg_alloc_batch(edata_t *slab, const bin_info_t *bin_info, - unsigned cnt, void** ptrs) { - slab_data_t *slab_data = edata_slab_data_get(slab); - - assert(edata_nfree_get(slab) >= cnt); - assert(!bitmap_full(slab_data->bitmap, &bin_info->bitmap_info)); - -#if (! defined JEMALLOC_INTERNAL_POPCOUNTL) || (defined BITMAP_USE_TREE) - for (unsigned i = 0; i < cnt; i++) { - size_t regind = bitmap_sfu(slab_data->bitmap, - &bin_info->bitmap_info); - *(ptrs + i) = (void *)((uintptr_t)edata_addr_get(slab) + - (uintptr_t)(bin_info->reg_size * regind)); - } -#else - unsigned group = 0; - bitmap_t g = slab_data->bitmap[group]; - unsigned i = 0; - while (i < cnt) { - while (g == 0) { - g = slab_data->bitmap[++group]; - } - size_t shift = group << LG_BITMAP_GROUP_NBITS; - size_t pop = popcount_lu(g); - if (pop > (cnt - i)) { - pop = cnt - i; - } - - /* - * Load from memory locations only once, outside the - * hot loop below. - */ - uintptr_t base = (uintptr_t)edata_addr_get(slab); - uintptr_t regsize = (uintptr_t)bin_info->reg_size; - while (pop--) { - size_t bit = cfs_lu(&g); - size_t regind = shift + bit; - *(ptrs + i) = (void *)(base + regsize * regind); - - i++; - } - slab_data->bitmap[group] = g; - } -#endif - edata_nfree_sub(slab, cnt); -} - -static void -arena_large_malloc_stats_update(tsdn_t *tsdn, arena_t *arena, size_t usize) { - szind_t index, hindex; - - cassert(config_stats); - - if (usize < SC_LARGE_MINCLASS) { - usize = SC_LARGE_MINCLASS; - } - index = sz_size2index(usize); - hindex = (index >= SC_NBINS) ? index - SC_NBINS : 0; - - locked_inc_u64(tsdn, LOCKEDINT_MTX(arena->stats.mtx), - &arena->stats.lstats[hindex].nmalloc, 1); -} - -static void -arena_large_dalloc_stats_update(tsdn_t *tsdn, arena_t *arena, size_t usize) { - szind_t index, hindex; - - cassert(config_stats); - - if (usize < SC_LARGE_MINCLASS) { - usize = SC_LARGE_MINCLASS; - } - index = sz_size2index(usize); - hindex = (index >= SC_NBINS) ? index - SC_NBINS : 0; - - locked_inc_u64(tsdn, LOCKEDINT_MTX(arena->stats.mtx), - &arena->stats.lstats[hindex].ndalloc, 1); -} - -static void -arena_large_ralloc_stats_update(tsdn_t *tsdn, arena_t *arena, size_t oldusize, - size_t usize) { - arena_large_malloc_stats_update(tsdn, arena, usize); - arena_large_dalloc_stats_update(tsdn, arena, oldusize); -} - -edata_t * -arena_extent_alloc_large(tsdn_t *tsdn, arena_t *arena, size_t usize, - size_t alignment, bool zero) { - bool deferred_work_generated = false; - szind_t szind = sz_size2index(usize); - size_t esize = usize + sz_large_pad; - - bool guarded = san_large_extent_decide_guard(tsdn, - arena_get_ehooks(arena), esize, alignment); - edata_t *edata = pa_alloc(tsdn, &arena->pa_shard, esize, alignment, - /* slab */ false, szind, zero, guarded, &deferred_work_generated); - assert(deferred_work_generated == false); - - if (edata != NULL) { - if (config_stats) { - LOCKEDINT_MTX_LOCK(tsdn, arena->stats.mtx); - arena_large_malloc_stats_update(tsdn, arena, usize); - LOCKEDINT_MTX_UNLOCK(tsdn, arena->stats.mtx); - } - } - - if (edata != NULL && sz_large_pad != 0) { - arena_cache_oblivious_randomize(tsdn, arena, edata, alignment); - } - - return edata; -} - -void -arena_extent_dalloc_large_prep(tsdn_t *tsdn, arena_t *arena, edata_t *edata) { - if (config_stats) { - LOCKEDINT_MTX_LOCK(tsdn, arena->stats.mtx); - arena_large_dalloc_stats_update(tsdn, arena, - edata_usize_get(edata)); - LOCKEDINT_MTX_UNLOCK(tsdn, arena->stats.mtx); - } -} - -void -arena_extent_ralloc_large_shrink(tsdn_t *tsdn, arena_t *arena, edata_t *edata, - size_t oldusize) { - size_t usize = edata_usize_get(edata); - - if (config_stats) { - LOCKEDINT_MTX_LOCK(tsdn, arena->stats.mtx); - arena_large_ralloc_stats_update(tsdn, arena, oldusize, usize); - LOCKEDINT_MTX_UNLOCK(tsdn, arena->stats.mtx); - } -} - -void -arena_extent_ralloc_large_expand(tsdn_t *tsdn, arena_t *arena, edata_t *edata, - size_t oldusize) { - size_t usize = edata_usize_get(edata); - - if (config_stats) { - LOCKEDINT_MTX_LOCK(tsdn, arena->stats.mtx); - arena_large_ralloc_stats_update(tsdn, arena, oldusize, usize); - LOCKEDINT_MTX_UNLOCK(tsdn, arena->stats.mtx); - } -} - -/* - * In situations where we're not forcing a decay (i.e. because the user - * specifically requested it), should we purge ourselves, or wait for the - * background thread to get to it. - */ -static pac_purge_eagerness_t -arena_decide_unforced_purge_eagerness(bool is_background_thread) { - if (is_background_thread) { - return PAC_PURGE_ALWAYS; - } else if (!is_background_thread && background_thread_enabled()) { - return PAC_PURGE_NEVER; - } else { - return PAC_PURGE_ON_EPOCH_ADVANCE; - } -} - -bool -arena_decay_ms_set(tsdn_t *tsdn, arena_t *arena, extent_state_t state, - ssize_t decay_ms) { - pac_purge_eagerness_t eagerness = arena_decide_unforced_purge_eagerness( - /* is_background_thread */ false); - return pa_decay_ms_set(tsdn, &arena->pa_shard, state, decay_ms, - eagerness); -} - -ssize_t -arena_decay_ms_get(arena_t *arena, extent_state_t state) { - return pa_decay_ms_get(&arena->pa_shard, state); -} - -static bool -arena_decay_impl(tsdn_t *tsdn, arena_t *arena, decay_t *decay, - pac_decay_stats_t *decay_stats, ecache_t *ecache, - bool is_background_thread, bool all) { - if (all) { - malloc_mutex_lock(tsdn, &decay->mtx); - pac_decay_all(tsdn, &arena->pa_shard.pac, decay, decay_stats, - ecache, /* fully_decay */ all); - malloc_mutex_unlock(tsdn, &decay->mtx); - return false; - } - - if (malloc_mutex_trylock(tsdn, &decay->mtx)) { - /* No need to wait if another thread is in progress. */ - return true; - } - pac_purge_eagerness_t eagerness = - arena_decide_unforced_purge_eagerness(is_background_thread); - bool epoch_advanced = pac_maybe_decay_purge(tsdn, &arena->pa_shard.pac, - decay, decay_stats, ecache, eagerness); - size_t npages_new; - if (epoch_advanced) { - /* Backlog is updated on epoch advance. */ - npages_new = decay_epoch_npages_delta(decay); - } - malloc_mutex_unlock(tsdn, &decay->mtx); - - if (have_background_thread && background_thread_enabled() && - epoch_advanced && !is_background_thread) { - arena_maybe_do_deferred_work(tsdn, arena, decay, npages_new); - } - - return false; -} - -static bool -arena_decay_dirty(tsdn_t *tsdn, arena_t *arena, bool is_background_thread, - bool all) { - return arena_decay_impl(tsdn, arena, &arena->pa_shard.pac.decay_dirty, - &arena->pa_shard.pac.stats->decay_dirty, - &arena->pa_shard.pac.ecache_dirty, is_background_thread, all); -} - -static bool -arena_decay_muzzy(tsdn_t *tsdn, arena_t *arena, bool is_background_thread, - bool all) { - if (pa_shard_dont_decay_muzzy(&arena->pa_shard)) { - return false; - } - return arena_decay_impl(tsdn, arena, &arena->pa_shard.pac.decay_muzzy, - &arena->pa_shard.pac.stats->decay_muzzy, - &arena->pa_shard.pac.ecache_muzzy, is_background_thread, all); -} - -void -arena_decay(tsdn_t *tsdn, arena_t *arena, bool is_background_thread, bool all) { - if (all) { - /* - * We should take a purge of "all" to mean "save as much memory - * as possible", including flushing any caches (for situations - * like thread death, or manual purge calls). - */ - sec_flush(tsdn, &arena->pa_shard.hpa_sec); - } - if (arena_decay_dirty(tsdn, arena, is_background_thread, all)) { - return; - } - arena_decay_muzzy(tsdn, arena, is_background_thread, all); -} - -static bool -arena_should_decay_early(tsdn_t *tsdn, arena_t *arena, decay_t *decay, - background_thread_info_t *info, nstime_t *remaining_sleep, - size_t npages_new) { - malloc_mutex_assert_owner(tsdn, &info->mtx); - - if (malloc_mutex_trylock(tsdn, &decay->mtx)) { - return false; - } - - if (!decay_gradually(decay)) { - malloc_mutex_unlock(tsdn, &decay->mtx); - return false; - } - - nstime_init(remaining_sleep, background_thread_wakeup_time_get(info)); - if (nstime_compare(remaining_sleep, &decay->epoch) <= 0) { - malloc_mutex_unlock(tsdn, &decay->mtx); - return false; - } - nstime_subtract(remaining_sleep, &decay->epoch); - if (npages_new > 0) { - uint64_t npurge_new = decay_npages_purge_in(decay, - remaining_sleep, npages_new); - info->npages_to_purge_new += npurge_new; - } - malloc_mutex_unlock(tsdn, &decay->mtx); - return info->npages_to_purge_new > - ARENA_DEFERRED_PURGE_NPAGES_THRESHOLD; -} - -/* - * Check if deferred work needs to be done sooner than planned. - * For decay we might want to wake up earlier because of an influx of dirty - * pages. Rather than waiting for previously estimated time, we proactively - * purge those pages. - * If background thread sleeps indefinitely, always wake up because some - * deferred work has been generated. - */ -static void -arena_maybe_do_deferred_work(tsdn_t *tsdn, arena_t *arena, decay_t *decay, - size_t npages_new) { - background_thread_info_t *info = arena_background_thread_info_get( - arena); - if (malloc_mutex_trylock(tsdn, &info->mtx)) { - /* - * Background thread may hold the mutex for a long period of - * time. We'd like to avoid the variance on application - * threads. So keep this non-blocking, and leave the work to a - * future epoch. - */ - return; - } - if (!background_thread_is_started(info)) { - goto label_done; - } - - nstime_t remaining_sleep; - if (background_thread_indefinite_sleep(info)) { - background_thread_wakeup_early(info, NULL); - } else if (arena_should_decay_early(tsdn, arena, decay, info, - &remaining_sleep, npages_new)) { - info->npages_to_purge_new = 0; - background_thread_wakeup_early(info, &remaining_sleep); - } -label_done: - malloc_mutex_unlock(tsdn, &info->mtx); -} - -/* Called from background threads. */ -void -arena_do_deferred_work(tsdn_t *tsdn, arena_t *arena) { - arena_decay(tsdn, arena, true, false); - pa_shard_do_deferred_work(tsdn, &arena->pa_shard); -} - -void -arena_slab_dalloc(tsdn_t *tsdn, arena_t *arena, edata_t *slab) { - bool deferred_work_generated = false; - pa_dalloc(tsdn, &arena->pa_shard, slab, &deferred_work_generated); - if (deferred_work_generated) { - arena_handle_deferred_work(tsdn, arena); - } -} - -static void -arena_bin_slabs_nonfull_insert(bin_t *bin, edata_t *slab) { - assert(edata_nfree_get(slab) > 0); - edata_heap_insert(&bin->slabs_nonfull, slab); - if (config_stats) { - bin->stats.nonfull_slabs++; - } -} - -static void -arena_bin_slabs_nonfull_remove(bin_t *bin, edata_t *slab) { - edata_heap_remove(&bin->slabs_nonfull, slab); - if (config_stats) { - bin->stats.nonfull_slabs--; - } -} - -static edata_t * -arena_bin_slabs_nonfull_tryget(bin_t *bin) { - edata_t *slab = edata_heap_remove_first(&bin->slabs_nonfull); - if (slab == NULL) { - return NULL; - } - if (config_stats) { - bin->stats.reslabs++; - bin->stats.nonfull_slabs--; - } - return slab; -} - -static void -arena_bin_slabs_full_insert(arena_t *arena, bin_t *bin, edata_t *slab) { - assert(edata_nfree_get(slab) == 0); - /* - * Tracking extents is required by arena_reset, which is not allowed - * for auto arenas. Bypass this step to avoid touching the edata - * linkage (often results in cache misses) for auto arenas. - */ - if (arena_is_auto(arena)) { - return; - } - edata_list_active_append(&bin->slabs_full, slab); -} - -static void -arena_bin_slabs_full_remove(arena_t *arena, bin_t *bin, edata_t *slab) { - if (arena_is_auto(arena)) { - return; - } - edata_list_active_remove(&bin->slabs_full, slab); -} - -static void -arena_bin_reset(tsd_t *tsd, arena_t *arena, bin_t *bin) { - edata_t *slab; - - malloc_mutex_lock(tsd_tsdn(tsd), &bin->lock); - if (bin->slabcur != NULL) { - slab = bin->slabcur; - bin->slabcur = NULL; - malloc_mutex_unlock(tsd_tsdn(tsd), &bin->lock); - arena_slab_dalloc(tsd_tsdn(tsd), arena, slab); - malloc_mutex_lock(tsd_tsdn(tsd), &bin->lock); - } - while ((slab = edata_heap_remove_first(&bin->slabs_nonfull)) != NULL) { - malloc_mutex_unlock(tsd_tsdn(tsd), &bin->lock); - arena_slab_dalloc(tsd_tsdn(tsd), arena, slab); - malloc_mutex_lock(tsd_tsdn(tsd), &bin->lock); - } - for (slab = edata_list_active_first(&bin->slabs_full); slab != NULL; - slab = edata_list_active_first(&bin->slabs_full)) { - arena_bin_slabs_full_remove(arena, bin, slab); - malloc_mutex_unlock(tsd_tsdn(tsd), &bin->lock); - arena_slab_dalloc(tsd_tsdn(tsd), arena, slab); - malloc_mutex_lock(tsd_tsdn(tsd), &bin->lock); - } - if (config_stats) { - bin->stats.curregs = 0; - bin->stats.curslabs = 0; - } - malloc_mutex_unlock(tsd_tsdn(tsd), &bin->lock); -} - -void -arena_reset(tsd_t *tsd, arena_t *arena) { - /* - * Locking in this function is unintuitive. The caller guarantees that - * no concurrent operations are happening in this arena, but there are - * still reasons that some locking is necessary: - * - * - Some of the functions in the transitive closure of calls assume - * appropriate locks are held, and in some cases these locks are - * temporarily dropped to avoid lock order reversal or deadlock due to - * reentry. - * - mallctl("epoch", ...) may concurrently refresh stats. While - * strictly speaking this is a "concurrent operation", disallowing - * stats refreshes would impose an inconvenient burden. - */ - - /* Large allocations. */ - malloc_mutex_lock(tsd_tsdn(tsd), &arena->large_mtx); - - for (edata_t *edata = edata_list_active_first(&arena->large); - edata != NULL; edata = edata_list_active_first(&arena->large)) { - void *ptr = edata_base_get(edata); - size_t usize; - - malloc_mutex_unlock(tsd_tsdn(tsd), &arena->large_mtx); - emap_alloc_ctx_t alloc_ctx; - emap_alloc_ctx_lookup(tsd_tsdn(tsd), &arena_emap_global, ptr, - &alloc_ctx); - assert(alloc_ctx.szind != SC_NSIZES); - - if (config_stats || (config_prof && opt_prof)) { - usize = sz_index2size(alloc_ctx.szind); - assert(usize == isalloc(tsd_tsdn(tsd), ptr)); - } - /* Remove large allocation from prof sample set. */ - if (config_prof && opt_prof) { - prof_free(tsd, ptr, usize, &alloc_ctx); - } - large_dalloc(tsd_tsdn(tsd), edata); - malloc_mutex_lock(tsd_tsdn(tsd), &arena->large_mtx); - } - malloc_mutex_unlock(tsd_tsdn(tsd), &arena->large_mtx); - - /* Bins. */ - for (unsigned i = 0; i < SC_NBINS; i++) { - for (unsigned j = 0; j < bin_infos[i].n_shards; j++) { - arena_bin_reset(tsd, arena, arena_get_bin(arena, i, j)); - } - } - pa_shard_reset(tsd_tsdn(tsd), &arena->pa_shard); -} - -static void -arena_prepare_base_deletion_sync_finish(tsd_t *tsd, malloc_mutex_t **mutexes, - unsigned n_mtx) { - for (unsigned i = 0; i < n_mtx; i++) { - malloc_mutex_lock(tsd_tsdn(tsd), mutexes[i]); - malloc_mutex_unlock(tsd_tsdn(tsd), mutexes[i]); - } -} - -#define ARENA_DESTROY_MAX_DELAYED_MTX 32 -static void -arena_prepare_base_deletion_sync(tsd_t *tsd, malloc_mutex_t *mtx, - malloc_mutex_t **delayed_mtx, unsigned *n_delayed) { - if (!malloc_mutex_trylock(tsd_tsdn(tsd), mtx)) { - /* No contention. */ - malloc_mutex_unlock(tsd_tsdn(tsd), mtx); - return; - } - unsigned n = *n_delayed; - assert(n < ARENA_DESTROY_MAX_DELAYED_MTX); - /* Add another to the batch. */ - delayed_mtx[n++] = mtx; - - if (n == ARENA_DESTROY_MAX_DELAYED_MTX) { - arena_prepare_base_deletion_sync_finish(tsd, delayed_mtx, n); - n = 0; - } - *n_delayed = n; -} - -static void -arena_prepare_base_deletion(tsd_t *tsd, base_t *base_to_destroy) { - /* - * In order to coalesce, emap_try_acquire_edata_neighbor will attempt to - * check neighbor edata's state to determine eligibility. This means - * under certain conditions, the metadata from an arena can be accessed - * w/o holding any locks from that arena. In order to guarantee safe - * memory access, the metadata and the underlying base allocator needs - * to be kept alive, until all pending accesses are done. - * - * 1) with opt_retain, the arena boundary implies the is_head state - * (tracked in the rtree leaf), and the coalesce flow will stop at the - * head state branch. Therefore no cross arena metadata access - * possible. - * - * 2) w/o opt_retain, the arena id needs to be read from the edata_t, - * meaning read only cross-arena metadata access is possible. The - * coalesce attempt will stop at the arena_id mismatch, and is always - * under one of the ecache locks. To allow safe passthrough of such - * metadata accesses, the loop below will iterate through all manual - * arenas' ecache locks. As all the metadata from this base allocator - * have been unlinked from the rtree, after going through all the - * relevant ecache locks, it's safe to say that a) pending accesses are - * all finished, and b) no new access will be generated. - */ - if (opt_retain) { - return; - } - unsigned destroy_ind = base_ind_get(base_to_destroy); - assert(destroy_ind >= manual_arena_base); - - tsdn_t *tsdn = tsd_tsdn(tsd); - malloc_mutex_t *delayed_mtx[ARENA_DESTROY_MAX_DELAYED_MTX]; - unsigned n_delayed = 0, total = narenas_total_get(); - for (unsigned i = 0; i < total; i++) { - if (i == destroy_ind) { - continue; - } - arena_t *arena = arena_get(tsdn, i, false); - if (arena == NULL) { - continue; - } - pac_t *pac = &arena->pa_shard.pac; - arena_prepare_base_deletion_sync(tsd, &pac->ecache_dirty.mtx, - delayed_mtx, &n_delayed); - arena_prepare_base_deletion_sync(tsd, &pac->ecache_muzzy.mtx, - delayed_mtx, &n_delayed); - arena_prepare_base_deletion_sync(tsd, &pac->ecache_retained.mtx, - delayed_mtx, &n_delayed); - } - arena_prepare_base_deletion_sync_finish(tsd, delayed_mtx, n_delayed); -} -#undef ARENA_DESTROY_MAX_DELAYED_MTX - -void -arena_destroy(tsd_t *tsd, arena_t *arena) { - assert(base_ind_get(arena->base) >= narenas_auto); - assert(arena_nthreads_get(arena, false) == 0); - assert(arena_nthreads_get(arena, true) == 0); - - /* - * No allocations have occurred since arena_reset() was called. - * Furthermore, the caller (arena_i_destroy_ctl()) purged all cached - * extents, so only retained extents may remain and it's safe to call - * pa_shard_destroy_retained. - */ - pa_shard_destroy(tsd_tsdn(tsd), &arena->pa_shard); - - /* - * Remove the arena pointer from the arenas array. We rely on the fact - * that there is no way for the application to get a dirty read from the - * arenas array unless there is an inherent race in the application - * involving access of an arena being concurrently destroyed. The - * application must synchronize knowledge of the arena's validity, so as - * long as we use an atomic write to update the arenas array, the - * application will get a clean read any time after it synchronizes - * knowledge that the arena is no longer valid. - */ - arena_set(base_ind_get(arena->base), NULL); - - /* - * Destroy the base allocator, which manages all metadata ever mapped by - * this arena. The prepare function will make sure no pending access to - * the metadata in this base anymore. - */ - arena_prepare_base_deletion(tsd, arena->base); - base_delete(tsd_tsdn(tsd), arena->base); -} - -static edata_t * -arena_slab_alloc(tsdn_t *tsdn, arena_t *arena, szind_t binind, unsigned binshard, - const bin_info_t *bin_info) { - bool deferred_work_generated = false; - witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn), - WITNESS_RANK_CORE, 0); - - bool guarded = san_slab_extent_decide_guard(tsdn, - arena_get_ehooks(arena)); - edata_t *slab = pa_alloc(tsdn, &arena->pa_shard, bin_info->slab_size, - /* alignment */ PAGE, /* slab */ true, /* szind */ binind, - /* zero */ false, guarded, &deferred_work_generated); - - if (deferred_work_generated) { - arena_handle_deferred_work(tsdn, arena); - } - - if (slab == NULL) { - return NULL; - } - assert(edata_slab_get(slab)); - - /* Initialize slab internals. */ - slab_data_t *slab_data = edata_slab_data_get(slab); - edata_nfree_binshard_set(slab, bin_info->nregs, binshard); - bitmap_init(slab_data->bitmap, &bin_info->bitmap_info, false); - - return slab; -} - -/* - * Before attempting the _with_fresh_slab approaches below, the _no_fresh_slab - * variants (i.e. through slabcur and nonfull) must be tried first. - */ -static void -arena_bin_refill_slabcur_with_fresh_slab(tsdn_t *tsdn, arena_t *arena, - bin_t *bin, szind_t binind, edata_t *fresh_slab) { - malloc_mutex_assert_owner(tsdn, &bin->lock); - /* Only called after slabcur and nonfull both failed. */ - assert(bin->slabcur == NULL); - assert(edata_heap_first(&bin->slabs_nonfull) == NULL); - assert(fresh_slab != NULL); - - /* A new slab from arena_slab_alloc() */ - assert(edata_nfree_get(fresh_slab) == bin_infos[binind].nregs); - if (config_stats) { - bin->stats.nslabs++; - bin->stats.curslabs++; - } - bin->slabcur = fresh_slab; -} - -/* Refill slabcur and then alloc using the fresh slab */ -static void * -arena_bin_malloc_with_fresh_slab(tsdn_t *tsdn, arena_t *arena, bin_t *bin, - szind_t binind, edata_t *fresh_slab) { - malloc_mutex_assert_owner(tsdn, &bin->lock); - arena_bin_refill_slabcur_with_fresh_slab(tsdn, arena, bin, binind, - fresh_slab); - - return arena_slab_reg_alloc(bin->slabcur, &bin_infos[binind]); -} - -static bool -arena_bin_refill_slabcur_no_fresh_slab(tsdn_t *tsdn, arena_t *arena, - bin_t *bin) { - malloc_mutex_assert_owner(tsdn, &bin->lock); - /* Only called after arena_slab_reg_alloc[_batch] failed. */ - assert(bin->slabcur == NULL || edata_nfree_get(bin->slabcur) == 0); - - if (bin->slabcur != NULL) { - arena_bin_slabs_full_insert(arena, bin, bin->slabcur); - } - - /* Look for a usable slab. */ - bin->slabcur = arena_bin_slabs_nonfull_tryget(bin); - assert(bin->slabcur == NULL || edata_nfree_get(bin->slabcur) > 0); - - return (bin->slabcur == NULL); -} - -bin_t * -arena_bin_choose(tsdn_t *tsdn, arena_t *arena, szind_t binind, - unsigned *binshard_p) { - unsigned binshard; - if (tsdn_null(tsdn) || tsd_arena_get(tsdn_tsd(tsdn)) == NULL) { - binshard = 0; - } else { - binshard = tsd_binshardsp_get(tsdn_tsd(tsdn))->binshard[binind]; - } - assert(binshard < bin_infos[binind].n_shards); - if (binshard_p != NULL) { - *binshard_p = binshard; - } - return arena_get_bin(arena, binind, binshard); -} - -void -arena_cache_bin_fill_small(tsdn_t *tsdn, arena_t *arena, - cache_bin_t *cache_bin, cache_bin_info_t *cache_bin_info, szind_t binind, - const unsigned nfill) { - assert(cache_bin_ncached_get_local(cache_bin, cache_bin_info) == 0); - - const bin_info_t *bin_info = &bin_infos[binind]; - - CACHE_BIN_PTR_ARRAY_DECLARE(ptrs, nfill); - cache_bin_init_ptr_array_for_fill(cache_bin, cache_bin_info, &ptrs, - nfill); - /* - * Bin-local resources are used first: 1) bin->slabcur, and 2) nonfull - * slabs. After both are exhausted, new slabs will be allocated through - * arena_slab_alloc(). - * - * Bin lock is only taken / released right before / after the while(...) - * refill loop, with new slab allocation (which has its own locking) - * kept outside of the loop. This setup facilitates flat combining, at - * the cost of the nested loop (through goto label_refill). - * - * To optimize for cases with contention and limited resources - * (e.g. hugepage-backed or non-overcommit arenas), each fill-iteration - * gets one chance of slab_alloc, and a retry of bin local resources - * after the slab allocation (regardless if slab_alloc failed, because - * the bin lock is dropped during the slab allocation). - * - * In other words, new slab allocation is allowed, as long as there was - * progress since the previous slab_alloc. This is tracked with - * made_progress below, initialized to true to jump start the first - * iteration. - * - * In other words (again), the loop will only terminate early (i.e. stop - * with filled < nfill) after going through the three steps: a) bin - * local exhausted, b) unlock and slab_alloc returns null, c) re-lock - * and bin local fails again. - */ - bool made_progress = true; - edata_t *fresh_slab = NULL; - bool alloc_and_retry = false; - unsigned filled = 0; - unsigned binshard; - bin_t *bin = arena_bin_choose(tsdn, arena, binind, &binshard); - -label_refill: - malloc_mutex_lock(tsdn, &bin->lock); - - while (filled < nfill) { - /* Try batch-fill from slabcur first. */ - edata_t *slabcur = bin->slabcur; - if (slabcur != NULL && edata_nfree_get(slabcur) > 0) { - unsigned tofill = nfill - filled; - unsigned nfree = edata_nfree_get(slabcur); - unsigned cnt = tofill < nfree ? tofill : nfree; - - arena_slab_reg_alloc_batch(slabcur, bin_info, cnt, - &ptrs.ptr[filled]); - made_progress = true; - filled += cnt; - continue; - } - /* Next try refilling slabcur from nonfull slabs. */ - if (!arena_bin_refill_slabcur_no_fresh_slab(tsdn, arena, bin)) { - assert(bin->slabcur != NULL); - continue; - } - - /* Then see if a new slab was reserved already. */ - if (fresh_slab != NULL) { - arena_bin_refill_slabcur_with_fresh_slab(tsdn, arena, - bin, binind, fresh_slab); - assert(bin->slabcur != NULL); - fresh_slab = NULL; - continue; - } - - /* Try slab_alloc if made progress (or never did slab_alloc). */ - if (made_progress) { - assert(bin->slabcur == NULL); - assert(fresh_slab == NULL); - alloc_and_retry = true; - /* Alloc a new slab then come back. */ - break; - } - - /* OOM. */ - - assert(fresh_slab == NULL); - assert(!alloc_and_retry); - break; - } /* while (filled < nfill) loop. */ - - if (config_stats && !alloc_and_retry) { - bin->stats.nmalloc += filled; - bin->stats.nrequests += cache_bin->tstats.nrequests; - bin->stats.curregs += filled; - bin->stats.nfills++; - cache_bin->tstats.nrequests = 0; - } - - malloc_mutex_unlock(tsdn, &bin->lock); - - if (alloc_and_retry) { - assert(fresh_slab == NULL); - assert(filled < nfill); - assert(made_progress); - - fresh_slab = arena_slab_alloc(tsdn, arena, binind, binshard, - bin_info); - /* fresh_slab NULL case handled in the for loop. */ - - alloc_and_retry = false; - made_progress = false; - goto label_refill; - } - assert(filled == nfill || (fresh_slab == NULL && !made_progress)); - - /* Release if allocated but not used. */ - if (fresh_slab != NULL) { - assert(edata_nfree_get(fresh_slab) == bin_info->nregs); - arena_slab_dalloc(tsdn, arena, fresh_slab); - fresh_slab = NULL; - } - - cache_bin_finish_fill(cache_bin, cache_bin_info, &ptrs, filled); - arena_decay_tick(tsdn, arena); -} - -size_t -arena_fill_small_fresh(tsdn_t *tsdn, arena_t *arena, szind_t binind, - void **ptrs, size_t nfill, bool zero) { - assert(binind < SC_NBINS); - const bin_info_t *bin_info = &bin_infos[binind]; - const size_t nregs = bin_info->nregs; - assert(nregs > 0); - const size_t usize = bin_info->reg_size; - - const bool manual_arena = !arena_is_auto(arena); - unsigned binshard; - bin_t *bin = arena_bin_choose(tsdn, arena, binind, &binshard); - - size_t nslab = 0; - size_t filled = 0; - edata_t *slab = NULL; - edata_list_active_t fulls; - edata_list_active_init(&fulls); - - while (filled < nfill && (slab = arena_slab_alloc(tsdn, arena, binind, - binshard, bin_info)) != NULL) { - assert((size_t)edata_nfree_get(slab) == nregs); - ++nslab; - size_t batch = nfill - filled; - if (batch > nregs) { - batch = nregs; - } - assert(batch > 0); - arena_slab_reg_alloc_batch(slab, bin_info, (unsigned)batch, - &ptrs[filled]); - assert(edata_addr_get(slab) == ptrs[filled]); - if (zero) { - memset(ptrs[filled], 0, batch * usize); - } - filled += batch; - if (batch == nregs) { - if (manual_arena) { - edata_list_active_append(&fulls, slab); - } - slab = NULL; - } - } - - malloc_mutex_lock(tsdn, &bin->lock); - /* - * Only the last slab can be non-empty, and the last slab is non-empty - * iff slab != NULL. - */ - if (slab != NULL) { - arena_bin_lower_slab(tsdn, arena, slab, bin); - } - if (manual_arena) { - edata_list_active_concat(&bin->slabs_full, &fulls); - } - assert(edata_list_active_empty(&fulls)); - if (config_stats) { - bin->stats.nslabs += nslab; - bin->stats.curslabs += nslab; - bin->stats.nmalloc += filled; - bin->stats.nrequests += filled; - bin->stats.curregs += filled; - } - malloc_mutex_unlock(tsdn, &bin->lock); - - arena_decay_tick(tsdn, arena); - return filled; -} - -/* - * Without allocating a new slab, try arena_slab_reg_alloc() and re-fill - * bin->slabcur if necessary. - */ -static void * -arena_bin_malloc_no_fresh_slab(tsdn_t *tsdn, arena_t *arena, bin_t *bin, - szind_t binind) { - malloc_mutex_assert_owner(tsdn, &bin->lock); - if (bin->slabcur == NULL || edata_nfree_get(bin->slabcur) == 0) { - if (arena_bin_refill_slabcur_no_fresh_slab(tsdn, arena, bin)) { - return NULL; - } - } - - assert(bin->slabcur != NULL && edata_nfree_get(bin->slabcur) > 0); - return arena_slab_reg_alloc(bin->slabcur, &bin_infos[binind]); -} - -static void * -arena_malloc_small(tsdn_t *tsdn, arena_t *arena, szind_t binind, bool zero) { - assert(binind < SC_NBINS); - const bin_info_t *bin_info = &bin_infos[binind]; - size_t usize = sz_index2size(binind); - unsigned binshard; - bin_t *bin = arena_bin_choose(tsdn, arena, binind, &binshard); - - malloc_mutex_lock(tsdn, &bin->lock); - edata_t *fresh_slab = NULL; - void *ret = arena_bin_malloc_no_fresh_slab(tsdn, arena, bin, binind); - if (ret == NULL) { - malloc_mutex_unlock(tsdn, &bin->lock); - /******************************/ - fresh_slab = arena_slab_alloc(tsdn, arena, binind, binshard, - bin_info); - /********************************/ - malloc_mutex_lock(tsdn, &bin->lock); - /* Retry since the lock was dropped. */ - ret = arena_bin_malloc_no_fresh_slab(tsdn, arena, bin, binind); - if (ret == NULL) { - if (fresh_slab == NULL) { - /* OOM */ - malloc_mutex_unlock(tsdn, &bin->lock); - return NULL; - } - ret = arena_bin_malloc_with_fresh_slab(tsdn, arena, bin, - binind, fresh_slab); - fresh_slab = NULL; - } - } - if (config_stats) { - bin->stats.nmalloc++; - bin->stats.nrequests++; - bin->stats.curregs++; - } - malloc_mutex_unlock(tsdn, &bin->lock); - - if (fresh_slab != NULL) { - arena_slab_dalloc(tsdn, arena, fresh_slab); - } - if (zero) { - memset(ret, 0, usize); - } - arena_decay_tick(tsdn, arena); - - return ret; -} - -void * -arena_malloc_hard(tsdn_t *tsdn, arena_t *arena, size_t size, szind_t ind, - bool zero) { - assert(!tsdn_null(tsdn) || arena != NULL); - - if (likely(!tsdn_null(tsdn))) { - arena = arena_choose_maybe_huge(tsdn_tsd(tsdn), arena, size); - } - if (unlikely(arena == NULL)) { - return NULL; - } - - if (likely(size <= SC_SMALL_MAXCLASS)) { - return arena_malloc_small(tsdn, arena, ind, zero); - } - return large_malloc(tsdn, arena, sz_index2size(ind), zero); -} - -void * -arena_palloc(tsdn_t *tsdn, arena_t *arena, size_t usize, size_t alignment, - bool zero, tcache_t *tcache) { - void *ret; - - if (usize <= SC_SMALL_MAXCLASS) { - /* Small; alignment doesn't require special slab placement. */ - - /* usize should be a result of sz_sa2u() */ - assert((usize & (alignment - 1)) == 0); - - /* - * Small usize can't come from an alignment larger than a page. - */ - assert(alignment <= PAGE); - - ret = arena_malloc(tsdn, arena, usize, sz_size2index(usize), - zero, tcache, true); - } else { - if (likely(alignment <= CACHELINE)) { - ret = large_malloc(tsdn, arena, usize, zero); - } else { - ret = large_palloc(tsdn, arena, usize, alignment, zero); - } - } - return ret; -} - -void -arena_prof_promote(tsdn_t *tsdn, void *ptr, size_t usize) { - cassert(config_prof); - assert(ptr != NULL); - assert(isalloc(tsdn, ptr) == SC_LARGE_MINCLASS); - assert(usize <= SC_SMALL_MAXCLASS); - - if (config_opt_safety_checks) { - safety_check_set_redzone(ptr, usize, SC_LARGE_MINCLASS); - } - - edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global, ptr); - - szind_t szind = sz_size2index(usize); - edata_szind_set(edata, szind); - emap_remap(tsdn, &arena_emap_global, edata, szind, /* slab */ false); - - assert(isalloc(tsdn, ptr) == usize); -} - -static size_t -arena_prof_demote(tsdn_t *tsdn, edata_t *edata, const void *ptr) { - cassert(config_prof); - assert(ptr != NULL); - - edata_szind_set(edata, SC_NBINS); - emap_remap(tsdn, &arena_emap_global, edata, SC_NBINS, /* slab */ false); - - assert(isalloc(tsdn, ptr) == SC_LARGE_MINCLASS); - - return SC_LARGE_MINCLASS; -} - -void -arena_dalloc_promoted(tsdn_t *tsdn, void *ptr, tcache_t *tcache, - bool slow_path) { - cassert(config_prof); - assert(opt_prof); - - edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global, ptr); - size_t usize = edata_usize_get(edata); - size_t bumped_usize = arena_prof_demote(tsdn, edata, ptr); - if (config_opt_safety_checks && usize < SC_LARGE_MINCLASS) { - /* - * Currently, we only do redzoning for small sampled - * allocations. - */ - assert(bumped_usize == SC_LARGE_MINCLASS); - safety_check_verify_redzone(ptr, usize, bumped_usize); - } - if (bumped_usize <= tcache_maxclass && tcache != NULL) { - tcache_dalloc_large(tsdn_tsd(tsdn), tcache, ptr, - sz_size2index(bumped_usize), slow_path); - } else { - large_dalloc(tsdn, edata); - } -} - -static void -arena_dissociate_bin_slab(arena_t *arena, edata_t *slab, bin_t *bin) { - /* Dissociate slab from bin. */ - if (slab == bin->slabcur) { - bin->slabcur = NULL; - } else { - szind_t binind = edata_szind_get(slab); - const bin_info_t *bin_info = &bin_infos[binind]; - - /* - * The following block's conditional is necessary because if the - * slab only contains one region, then it never gets inserted - * into the non-full slabs heap. - */ - if (bin_info->nregs == 1) { - arena_bin_slabs_full_remove(arena, bin, slab); - } else { - arena_bin_slabs_nonfull_remove(bin, slab); - } - } -} - -static void -arena_bin_lower_slab(tsdn_t *tsdn, arena_t *arena, edata_t *slab, - bin_t *bin) { - assert(edata_nfree_get(slab) > 0); - - /* - * Make sure that if bin->slabcur is non-NULL, it refers to the - * oldest/lowest non-full slab. It is okay to NULL slabcur out rather - * than proactively keeping it pointing at the oldest/lowest non-full - * slab. - */ - if (bin->slabcur != NULL && edata_snad_comp(bin->slabcur, slab) > 0) { - /* Switch slabcur. */ - if (edata_nfree_get(bin->slabcur) > 0) { - arena_bin_slabs_nonfull_insert(bin, bin->slabcur); - } else { - arena_bin_slabs_full_insert(arena, bin, bin->slabcur); - } - bin->slabcur = slab; - if (config_stats) { - bin->stats.reslabs++; - } - } else { - arena_bin_slabs_nonfull_insert(bin, slab); - } -} - -static void -arena_dalloc_bin_slab_prepare(tsdn_t *tsdn, edata_t *slab, bin_t *bin) { - malloc_mutex_assert_owner(tsdn, &bin->lock); - - assert(slab != bin->slabcur); - if (config_stats) { - bin->stats.curslabs--; - } -} - -void -arena_dalloc_bin_locked_handle_newly_empty(tsdn_t *tsdn, arena_t *arena, - edata_t *slab, bin_t *bin) { - arena_dissociate_bin_slab(arena, slab, bin); - arena_dalloc_bin_slab_prepare(tsdn, slab, bin); -} - -void -arena_dalloc_bin_locked_handle_newly_nonempty(tsdn_t *tsdn, arena_t *arena, - edata_t *slab, bin_t *bin) { - arena_bin_slabs_full_remove(arena, bin, slab); - arena_bin_lower_slab(tsdn, arena, slab, bin); -} - -static void -arena_dalloc_bin(tsdn_t *tsdn, arena_t *arena, edata_t *edata, void *ptr) { - szind_t binind = edata_szind_get(edata); - unsigned binshard = edata_binshard_get(edata); - bin_t *bin = arena_get_bin(arena, binind, binshard); - - malloc_mutex_lock(tsdn, &bin->lock); - arena_dalloc_bin_locked_info_t info; - arena_dalloc_bin_locked_begin(&info, binind); - bool ret = arena_dalloc_bin_locked_step(tsdn, arena, bin, - &info, binind, edata, ptr); - arena_dalloc_bin_locked_finish(tsdn, arena, bin, &info); - malloc_mutex_unlock(tsdn, &bin->lock); - - if (ret) { - arena_slab_dalloc(tsdn, arena, edata); - } -} - -void -arena_dalloc_small(tsdn_t *tsdn, void *ptr) { - edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global, ptr); - arena_t *arena = arena_get_from_edata(edata); - - arena_dalloc_bin(tsdn, arena, edata, ptr); - arena_decay_tick(tsdn, arena); -} - -bool -arena_ralloc_no_move(tsdn_t *tsdn, void *ptr, size_t oldsize, size_t size, - size_t extra, bool zero, size_t *newsize) { - bool ret; - /* Calls with non-zero extra had to clamp extra. */ - assert(extra == 0 || size + extra <= SC_LARGE_MAXCLASS); - - edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global, ptr); - if (unlikely(size > SC_LARGE_MAXCLASS)) { - ret = true; - goto done; - } - - size_t usize_min = sz_s2u(size); - size_t usize_max = sz_s2u(size + extra); - if (likely(oldsize <= SC_SMALL_MAXCLASS && usize_min - <= SC_SMALL_MAXCLASS)) { - /* - * Avoid moving the allocation if the size class can be left the - * same. - */ - assert(bin_infos[sz_size2index(oldsize)].reg_size == - oldsize); - if ((usize_max > SC_SMALL_MAXCLASS - || sz_size2index(usize_max) != sz_size2index(oldsize)) - && (size > oldsize || usize_max < oldsize)) { - ret = true; - goto done; - } - - arena_t *arena = arena_get_from_edata(edata); - arena_decay_tick(tsdn, arena); - ret = false; - } else if (oldsize >= SC_LARGE_MINCLASS - && usize_max >= SC_LARGE_MINCLASS) { - ret = large_ralloc_no_move(tsdn, edata, usize_min, usize_max, - zero); - } else { - ret = true; - } -done: - assert(edata == emap_edata_lookup(tsdn, &arena_emap_global, ptr)); - *newsize = edata_usize_get(edata); - - return ret; -} - -static void * -arena_ralloc_move_helper(tsdn_t *tsdn, arena_t *arena, size_t usize, - size_t alignment, bool zero, tcache_t *tcache) { - if (alignment == 0) { - return arena_malloc(tsdn, arena, usize, sz_size2index(usize), - zero, tcache, true); - } - usize = sz_sa2u(usize, alignment); - if (unlikely(usize == 0 || usize > SC_LARGE_MAXCLASS)) { - return NULL; - } - return ipalloct(tsdn, usize, alignment, zero, tcache, arena); -} - -void * -arena_ralloc(tsdn_t *tsdn, arena_t *arena, void *ptr, size_t oldsize, - size_t size, size_t alignment, bool zero, tcache_t *tcache, - hook_ralloc_args_t *hook_args) { - size_t usize = alignment == 0 ? sz_s2u(size) : sz_sa2u(size, alignment); - if (unlikely(usize == 0 || size > SC_LARGE_MAXCLASS)) { - return NULL; - } - - if (likely(usize <= SC_SMALL_MAXCLASS)) { - /* Try to avoid moving the allocation. */ - UNUSED size_t newsize; - if (!arena_ralloc_no_move(tsdn, ptr, oldsize, usize, 0, zero, - &newsize)) { - hook_invoke_expand(hook_args->is_realloc - ? hook_expand_realloc : hook_expand_rallocx, - ptr, oldsize, usize, (uintptr_t)ptr, - hook_args->args); - return ptr; - } - } - - if (oldsize >= SC_LARGE_MINCLASS - && usize >= SC_LARGE_MINCLASS) { - return large_ralloc(tsdn, arena, ptr, usize, - alignment, zero, tcache, hook_args); - } - - /* - * size and oldsize are different enough that we need to move the - * object. In that case, fall back to allocating new space and copying. - */ - void *ret = arena_ralloc_move_helper(tsdn, arena, usize, alignment, - zero, tcache); - if (ret == NULL) { - return NULL; - } - - hook_invoke_alloc(hook_args->is_realloc - ? hook_alloc_realloc : hook_alloc_rallocx, ret, (uintptr_t)ret, - hook_args->args); - hook_invoke_dalloc(hook_args->is_realloc - ? hook_dalloc_realloc : hook_dalloc_rallocx, ptr, hook_args->args); - - /* - * Junk/zero-filling were already done by - * ipalloc()/arena_malloc(). - */ - size_t copysize = (usize < oldsize) ? usize : oldsize; - memcpy(ret, ptr, copysize); - isdalloct(tsdn, ptr, oldsize, tcache, NULL, true); - return ret; -} - -ehooks_t * -arena_get_ehooks(arena_t *arena) { - return base_ehooks_get(arena->base); -} - -extent_hooks_t * -arena_set_extent_hooks(tsd_t *tsd, arena_t *arena, - extent_hooks_t *extent_hooks) { - background_thread_info_t *info; - if (have_background_thread) { - info = arena_background_thread_info_get(arena); - malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx); - } - /* No using the HPA now that we have the custom hooks. */ - pa_shard_disable_hpa(tsd_tsdn(tsd), &arena->pa_shard); - extent_hooks_t *ret = base_extent_hooks_set(arena->base, extent_hooks); - if (have_background_thread) { - malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx); - } - - return ret; -} - -dss_prec_t -arena_dss_prec_get(arena_t *arena) { - return (dss_prec_t)atomic_load_u(&arena->dss_prec, ATOMIC_ACQUIRE); -} - -bool -arena_dss_prec_set(arena_t *arena, dss_prec_t dss_prec) { - if (!have_dss) { - return (dss_prec != dss_prec_disabled); - } - atomic_store_u(&arena->dss_prec, (unsigned)dss_prec, ATOMIC_RELEASE); - return false; -} - -ssize_t -arena_dirty_decay_ms_default_get(void) { - return atomic_load_zd(&dirty_decay_ms_default, ATOMIC_RELAXED); -} - -bool -arena_dirty_decay_ms_default_set(ssize_t decay_ms) { - if (!decay_ms_valid(decay_ms)) { - return true; - } - atomic_store_zd(&dirty_decay_ms_default, decay_ms, ATOMIC_RELAXED); - return false; -} - -ssize_t -arena_muzzy_decay_ms_default_get(void) { - return atomic_load_zd(&muzzy_decay_ms_default, ATOMIC_RELAXED); -} - -bool -arena_muzzy_decay_ms_default_set(ssize_t decay_ms) { - if (!decay_ms_valid(decay_ms)) { - return true; - } - atomic_store_zd(&muzzy_decay_ms_default, decay_ms, ATOMIC_RELAXED); - return false; -} - -bool -arena_retain_grow_limit_get_set(tsd_t *tsd, arena_t *arena, size_t *old_limit, - size_t *new_limit) { - assert(opt_retain); - return pac_retain_grow_limit_get_set(tsd_tsdn(tsd), - &arena->pa_shard.pac, old_limit, new_limit); -} - -unsigned -arena_nthreads_get(arena_t *arena, bool internal) { - return atomic_load_u(&arena->nthreads[internal], ATOMIC_RELAXED); -} - -void -arena_nthreads_inc(arena_t *arena, bool internal) { - atomic_fetch_add_u(&arena->nthreads[internal], 1, ATOMIC_RELAXED); -} - -void -arena_nthreads_dec(arena_t *arena, bool internal) { - atomic_fetch_sub_u(&arena->nthreads[internal], 1, ATOMIC_RELAXED); -} - -arena_t * -arena_new(tsdn_t *tsdn, unsigned ind, const arena_config_t *config) { - arena_t *arena; - base_t *base; - unsigned i; - - if (ind == 0) { - base = b0get(); - } else { - base = base_new(tsdn, ind, config->extent_hooks, - config->metadata_use_hooks); - if (base == NULL) { - return NULL; - } - } - - size_t arena_size = sizeof(arena_t) + sizeof(bin_t) * nbins_total; - arena = (arena_t *)base_alloc(tsdn, base, arena_size, CACHELINE); - if (arena == NULL) { - goto label_error; - } - - atomic_store_u(&arena->nthreads[0], 0, ATOMIC_RELAXED); - atomic_store_u(&arena->nthreads[1], 0, ATOMIC_RELAXED); - arena->last_thd = NULL; - - if (config_stats) { - if (arena_stats_init(tsdn, &arena->stats)) { - goto label_error; - } - - ql_new(&arena->tcache_ql); - ql_new(&arena->cache_bin_array_descriptor_ql); - if (malloc_mutex_init(&arena->tcache_ql_mtx, "tcache_ql", - WITNESS_RANK_TCACHE_QL, malloc_mutex_rank_exclusive)) { - goto label_error; - } - } - - atomic_store_u(&arena->dss_prec, (unsigned)extent_dss_prec_get(), - ATOMIC_RELAXED); - - edata_list_active_init(&arena->large); - if (malloc_mutex_init(&arena->large_mtx, "arena_large", - WITNESS_RANK_ARENA_LARGE, malloc_mutex_rank_exclusive)) { - goto label_error; - } - - nstime_t cur_time; - nstime_init_update(&cur_time); - if (pa_shard_init(tsdn, &arena->pa_shard, &arena_pa_central_global, - &arena_emap_global, base, ind, &arena->stats.pa_shard_stats, - LOCKEDINT_MTX(arena->stats.mtx), &cur_time, oversize_threshold, - arena_dirty_decay_ms_default_get(), - arena_muzzy_decay_ms_default_get())) { - goto label_error; - } - - /* Initialize bins. */ - atomic_store_u(&arena->binshard_next, 0, ATOMIC_RELEASE); - for (i = 0; i < nbins_total; i++) { - bool err = bin_init(&arena->bins[i]); - if (err) { - goto label_error; - } - } - - arena->base = base; - /* Set arena before creating background threads. */ - arena_set(ind, arena); - arena->ind = ind; - - nstime_init_update(&arena->create_time); - - /* - * We turn on the HPA if set to. There are two exceptions: - * - Custom extent hooks (we should only return memory allocated from - * them in that case). - * - Arena 0 initialization. In this case, we're mid-bootstrapping, and - * so arena_hpa_global is not yet initialized. - */ - if (opt_hpa && ehooks_are_default(base_ehooks_get(base)) && ind != 0) { - hpa_shard_opts_t hpa_shard_opts = opt_hpa_opts; - hpa_shard_opts.deferral_allowed = background_thread_enabled(); - if (pa_shard_enable_hpa(tsdn, &arena->pa_shard, - &hpa_shard_opts, &opt_hpa_sec_opts)) { - goto label_error; - } - } - - /* We don't support reentrancy for arena 0 bootstrapping. */ - if (ind != 0) { - /* - * If we're here, then arena 0 already exists, so bootstrapping - * is done enough that we should have tsd. - */ - assert(!tsdn_null(tsdn)); - pre_reentrancy(tsdn_tsd(tsdn), arena); - if (test_hooks_arena_new_hook) { - test_hooks_arena_new_hook(); - } - post_reentrancy(tsdn_tsd(tsdn)); - } - - return arena; -label_error: - if (ind != 0) { - base_delete(tsdn, base); - } - return NULL; -} - -arena_t * -arena_choose_huge(tsd_t *tsd) { - /* huge_arena_ind can be 0 during init (will use a0). */ - if (huge_arena_ind == 0) { - assert(!malloc_initialized()); - } - - arena_t *huge_arena = arena_get(tsd_tsdn(tsd), huge_arena_ind, false); - if (huge_arena == NULL) { - /* Create the huge arena on demand. */ - assert(huge_arena_ind != 0); - huge_arena = arena_get(tsd_tsdn(tsd), huge_arena_ind, true); - if (huge_arena == NULL) { - return NULL; - } - /* - * Purge eagerly for huge allocations, because: 1) number of - * huge allocations is usually small, which means ticker based - * decay is not reliable; and 2) less immediate reuse is - * expected for huge allocations. - */ - if (arena_dirty_decay_ms_default_get() > 0) { - arena_decay_ms_set(tsd_tsdn(tsd), huge_arena, - extent_state_dirty, 0); - } - if (arena_muzzy_decay_ms_default_get() > 0) { - arena_decay_ms_set(tsd_tsdn(tsd), huge_arena, - extent_state_muzzy, 0); - } - } - - return huge_arena; -} - -bool -arena_init_huge(void) { - bool huge_enabled; - - /* The threshold should be large size class. */ - if (opt_oversize_threshold > SC_LARGE_MAXCLASS || - opt_oversize_threshold < SC_LARGE_MINCLASS) { - opt_oversize_threshold = 0; - oversize_threshold = SC_LARGE_MAXCLASS + PAGE; - huge_enabled = false; - } else { - /* Reserve the index for the huge arena. */ - huge_arena_ind = narenas_total_get(); - oversize_threshold = opt_oversize_threshold; - huge_enabled = true; - } - - return huge_enabled; -} - -bool -arena_is_huge(unsigned arena_ind) { - if (huge_arena_ind == 0) { - return false; - } - return (arena_ind == huge_arena_ind); -} - -bool -arena_boot(sc_data_t *sc_data, base_t *base, bool hpa) { - arena_dirty_decay_ms_default_set(opt_dirty_decay_ms); - arena_muzzy_decay_ms_default_set(opt_muzzy_decay_ms); - for (unsigned i = 0; i < SC_NBINS; i++) { - sc_t *sc = &sc_data->sc[i]; - div_init(&arena_binind_div_info[i], - (1U << sc->lg_base) + (sc->ndelta << sc->lg_delta)); - } - - uint32_t cur_offset = (uint32_t)offsetof(arena_t, bins); - for (szind_t i = 0; i < SC_NBINS; i++) { - arena_bin_offsets[i] = cur_offset; - nbins_total += bin_infos[i].n_shards; - cur_offset += (uint32_t)(bin_infos[i].n_shards * sizeof(bin_t)); - } - return pa_central_init(&arena_pa_central_global, base, hpa, - &hpa_hooks_default); -} - -void -arena_prefork0(tsdn_t *tsdn, arena_t *arena) { - pa_shard_prefork0(tsdn, &arena->pa_shard); -} - -void -arena_prefork1(tsdn_t *tsdn, arena_t *arena) { - if (config_stats) { - malloc_mutex_prefork(tsdn, &arena->tcache_ql_mtx); - } -} - -void -arena_prefork2(tsdn_t *tsdn, arena_t *arena) { - pa_shard_prefork2(tsdn, &arena->pa_shard); -} - -void -arena_prefork3(tsdn_t *tsdn, arena_t *arena) { - pa_shard_prefork3(tsdn, &arena->pa_shard); -} - -void -arena_prefork4(tsdn_t *tsdn, arena_t *arena) { - pa_shard_prefork4(tsdn, &arena->pa_shard); -} - -void -arena_prefork5(tsdn_t *tsdn, arena_t *arena) { - pa_shard_prefork5(tsdn, &arena->pa_shard); -} - -void -arena_prefork6(tsdn_t *tsdn, arena_t *arena) { - base_prefork(tsdn, arena->base); -} - -void -arena_prefork7(tsdn_t *tsdn, arena_t *arena) { - malloc_mutex_prefork(tsdn, &arena->large_mtx); -} - -void -arena_prefork8(tsdn_t *tsdn, arena_t *arena) { - for (unsigned i = 0; i < nbins_total; i++) { - bin_prefork(tsdn, &arena->bins[i]); - } -} - -void -arena_postfork_parent(tsdn_t *tsdn, arena_t *arena) { - for (unsigned i = 0; i < nbins_total; i++) { - bin_postfork_parent(tsdn, &arena->bins[i]); - } - - malloc_mutex_postfork_parent(tsdn, &arena->large_mtx); - base_postfork_parent(tsdn, arena->base); - pa_shard_postfork_parent(tsdn, &arena->pa_shard); - if (config_stats) { - malloc_mutex_postfork_parent(tsdn, &arena->tcache_ql_mtx); - } -} - -void -arena_postfork_child(tsdn_t *tsdn, arena_t *arena) { - atomic_store_u(&arena->nthreads[0], 0, ATOMIC_RELAXED); - atomic_store_u(&arena->nthreads[1], 0, ATOMIC_RELAXED); - if (tsd_arena_get(tsdn_tsd(tsdn)) == arena) { - arena_nthreads_inc(arena, false); - } - if (tsd_iarena_get(tsdn_tsd(tsdn)) == arena) { - arena_nthreads_inc(arena, true); - } - if (config_stats) { - ql_new(&arena->tcache_ql); - ql_new(&arena->cache_bin_array_descriptor_ql); - tcache_slow_t *tcache_slow = tcache_slow_get(tsdn_tsd(tsdn)); - if (tcache_slow != NULL && tcache_slow->arena == arena) { - tcache_t *tcache = tcache_slow->tcache; - ql_elm_new(tcache_slow, link); - ql_tail_insert(&arena->tcache_ql, tcache_slow, link); - cache_bin_array_descriptor_init( - &tcache_slow->cache_bin_array_descriptor, - tcache->bins); - ql_tail_insert(&arena->cache_bin_array_descriptor_ql, - &tcache_slow->cache_bin_array_descriptor, link); - } - } - - for (unsigned i = 0; i < nbins_total; i++) { - bin_postfork_child(tsdn, &arena->bins[i]); - } - - malloc_mutex_postfork_child(tsdn, &arena->large_mtx); - base_postfork_child(tsdn, arena->base); - pa_shard_postfork_child(tsdn, &arena->pa_shard); - if (config_stats) { - malloc_mutex_postfork_child(tsdn, &arena->tcache_ql_mtx); - } -} |