244 lines
7.0 KiB
C
244 lines
7.0 KiB
C
#ifndef JEMALLOC_INTERNAL_TCACHE_INLINES_H
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#define JEMALLOC_INTERNAL_TCACHE_INLINES_H
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#include "jemalloc/internal/jemalloc_preamble.h"
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#include "jemalloc/internal/arena_externs.h"
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#include "jemalloc/internal/bin.h"
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#include "jemalloc/internal/jemalloc_internal_inlines_b.h"
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#include "jemalloc/internal/jemalloc_internal_types.h"
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#include "jemalloc/internal/large_externs.h"
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#include "jemalloc/internal/san.h"
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#include "jemalloc/internal/sc.h"
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#include "jemalloc/internal/sz.h"
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#include "jemalloc/internal/tcache_externs.h"
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#include "jemalloc/internal/util.h"
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static inline bool
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tcache_enabled_get(tsd_t *tsd) {
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return tsd_tcache_enabled_get(tsd);
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}
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static inline unsigned
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tcache_nbins_get(tcache_slow_t *tcache_slow) {
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assert(tcache_slow != NULL);
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unsigned nbins = tcache_slow->tcache_nbins;
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assert(nbins <= TCACHE_NBINS_MAX);
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return nbins;
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}
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static inline size_t
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tcache_max_get(tcache_slow_t *tcache_slow) {
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assert(tcache_slow != NULL);
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size_t tcache_max = sz_index2size(tcache_nbins_get(tcache_slow) - 1);
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assert(tcache_max <= TCACHE_MAXCLASS_LIMIT);
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return tcache_max;
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}
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static inline void
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tcache_max_set(tcache_slow_t *tcache_slow, size_t tcache_max) {
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assert(tcache_slow != NULL);
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assert(tcache_max <= TCACHE_MAXCLASS_LIMIT);
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tcache_slow->tcache_nbins = sz_size2index(tcache_max) + 1;
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}
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static inline void
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tcache_bin_settings_backup(tcache_t *tcache,
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cache_bin_info_t tcache_bin_info[TCACHE_NBINS_MAX]) {
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for (unsigned i = 0; i < TCACHE_NBINS_MAX; i++) {
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cache_bin_info_init(&tcache_bin_info[i],
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cache_bin_ncached_max_get_unsafe(&tcache->bins[i]));
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}
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}
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JEMALLOC_ALWAYS_INLINE bool
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tcache_bin_disabled(szind_t ind, cache_bin_t *bin,
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tcache_slow_t *tcache_slow) {
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assert(bin != NULL);
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assert(ind < TCACHE_NBINS_MAX);
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bool disabled = cache_bin_disabled(bin);
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/*
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* If a bin's ind >= nbins or ncached_max == 0, it must be disabled.
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* However, when ind < nbins, it could be either enabled
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* (ncached_max > 0) or disabled (ncached_max == 0). Similarly, when
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* ncached_max > 0, it could be either enabled (ind < nbins) or
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* disabled (ind >= nbins). Thus, if a bin is disabled, it has either
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* ind >= nbins or ncached_max == 0. If a bin is enabled, it has
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* ind < nbins and ncached_max > 0.
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*/
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unsigned nbins = tcache_nbins_get(tcache_slow);
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cache_bin_sz_t ncached_max = cache_bin_ncached_max_get_unsafe(bin);
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if (ind >= nbins) {
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assert(disabled);
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} else {
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assert(!disabled || ncached_max == 0);
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}
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if (ncached_max == 0) {
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assert(disabled);
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} else {
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assert(!disabled || ind >= nbins);
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}
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if (disabled) {
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assert(ind >= nbins || ncached_max == 0);
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} else {
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assert(ind < nbins && ncached_max > 0);
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}
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return disabled;
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}
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JEMALLOC_ALWAYS_INLINE void *
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tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache,
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size_t size, szind_t binind, bool zero, bool slow_path) {
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void *ret;
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bool tcache_success;
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assert(binind < SC_NBINS);
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cache_bin_t *bin = &tcache->bins[binind];
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ret = cache_bin_alloc(bin, &tcache_success);
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assert(tcache_success == (ret != NULL));
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if (unlikely(!tcache_success)) {
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bool tcache_hard_success;
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arena = arena_choose(tsd, arena);
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if (unlikely(arena == NULL)) {
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return NULL;
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}
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if (unlikely(tcache_bin_disabled(binind, bin,
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tcache->tcache_slow))) {
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/* stats and zero are handled directly by the arena. */
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return arena_malloc_hard(tsd_tsdn(tsd), arena, size,
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binind, zero, /* slab */ true);
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}
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tcache_bin_flush_stashed(tsd, tcache, bin, binind,
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/* is_small */ true);
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ret = tcache_alloc_small_hard(tsd_tsdn(tsd), arena, tcache,
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bin, binind, &tcache_hard_success);
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if (tcache_hard_success == false) {
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return NULL;
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}
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}
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assert(ret);
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if (unlikely(zero)) {
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size_t usize = sz_index2size(binind);
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assert(tcache_salloc(tsd_tsdn(tsd), ret) == usize);
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memset(ret, 0, usize);
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}
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if (config_stats) {
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bin->tstats.nrequests++;
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}
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return ret;
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}
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JEMALLOC_ALWAYS_INLINE void *
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tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
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szind_t binind, bool zero, bool slow_path) {
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void *ret;
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bool tcache_success;
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cache_bin_t *bin = &tcache->bins[binind];
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assert(binind >= SC_NBINS &&
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!tcache_bin_disabled(binind, bin, tcache->tcache_slow));
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ret = cache_bin_alloc(bin, &tcache_success);
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assert(tcache_success == (ret != NULL));
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if (unlikely(!tcache_success)) {
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/*
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* Only allocate one large object at a time, because it's quite
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* expensive to create one and not use it.
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*/
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arena = arena_choose(tsd, arena);
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if (unlikely(arena == NULL)) {
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return NULL;
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}
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tcache_bin_flush_stashed(tsd, tcache, bin, binind,
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/* is_small */ false);
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ret = large_malloc(tsd_tsdn(tsd), arena, sz_s2u(size), zero);
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if (ret == NULL) {
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return NULL;
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}
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} else {
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if (unlikely(zero)) {
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size_t usize = sz_index2size(binind);
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assert(usize <= tcache_max_get(tcache->tcache_slow));
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memset(ret, 0, usize);
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}
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if (config_stats) {
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bin->tstats.nrequests++;
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}
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}
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return ret;
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}
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JEMALLOC_ALWAYS_INLINE void
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tcache_dalloc_small(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
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bool slow_path) {
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assert(tcache_salloc(tsd_tsdn(tsd), ptr) <= SC_SMALL_MAXCLASS);
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cache_bin_t *bin = &tcache->bins[binind];
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/*
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* Not marking the branch unlikely because this is past free_fastpath()
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* (which handles the most common cases), i.e. at this point it's often
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* uncommon cases.
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*/
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if (cache_bin_nonfast_aligned(ptr)) {
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/* Junk unconditionally, even if bin is full. */
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san_junk_ptr(ptr, sz_index2size(binind));
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if (cache_bin_stash(bin, ptr)) {
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return;
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}
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assert(cache_bin_full(bin));
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/* Bin full; fall through into the flush branch. */
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}
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if (unlikely(!cache_bin_dalloc_easy(bin, ptr))) {
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if (unlikely(tcache_bin_disabled(binind, bin,
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tcache->tcache_slow))) {
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arena_dalloc_small(tsd_tsdn(tsd), ptr);
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return;
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}
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cache_bin_sz_t max = cache_bin_ncached_max_get(bin);
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unsigned remain = max >> opt_lg_tcache_flush_small_div;
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tcache_bin_flush_small(tsd, tcache, bin, binind, remain);
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bool ret = cache_bin_dalloc_easy(bin, ptr);
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assert(ret);
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}
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}
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JEMALLOC_ALWAYS_INLINE void
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tcache_dalloc_large(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
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bool slow_path) {
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assert(tcache_salloc(tsd_tsdn(tsd), ptr) > SC_SMALL_MAXCLASS);
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assert(tcache_salloc(tsd_tsdn(tsd), ptr) <=
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tcache_max_get(tcache->tcache_slow));
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assert(!tcache_bin_disabled(binind, &tcache->bins[binind],
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tcache->tcache_slow));
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cache_bin_t *bin = &tcache->bins[binind];
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if (unlikely(!cache_bin_dalloc_easy(bin, ptr))) {
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unsigned remain = cache_bin_ncached_max_get(bin) >>
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opt_lg_tcache_flush_large_div;
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tcache_bin_flush_large(tsd, tcache, bin, binind, remain);
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bool ret = cache_bin_dalloc_easy(bin, ptr);
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assert(ret);
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}
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}
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JEMALLOC_ALWAYS_INLINE tcache_t *
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tcaches_get(tsd_t *tsd, unsigned ind) {
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tcaches_t *elm = &tcaches[ind];
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if (unlikely(elm->tcache == NULL)) {
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malloc_printf("<jemalloc>: invalid tcache id (%u).\n", ind);
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abort();
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} else if (unlikely(elm->tcache == TCACHES_ELM_NEED_REINIT)) {
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elm->tcache = tcache_create_explicit(tsd);
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}
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return elm->tcache;
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}
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#endif /* JEMALLOC_INTERNAL_TCACHE_INLINES_H */
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