409 lines
11 KiB
C
409 lines
11 KiB
C
#ifndef JEMALLOC_INTERNAL_ARENA_INLINES_B_H
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#define JEMALLOC_INTERNAL_ARENA_INLINES_B_H
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#include "jemalloc/internal/emap.h"
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#include "jemalloc/internal/jemalloc_internal_types.h"
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#include "jemalloc/internal/mutex.h"
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#include "jemalloc/internal/rtree.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/ticker.h"
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static inline arena_t *
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arena_get_from_edata(edata_t *edata) {
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return (arena_t *)atomic_load_p(&arenas[edata_arena_ind_get(edata)],
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ATOMIC_RELAXED);
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}
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JEMALLOC_ALWAYS_INLINE arena_t *
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arena_choose_maybe_huge(tsd_t *tsd, arena_t *arena, size_t size) {
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if (arena != NULL) {
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return arena;
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}
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/*
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* For huge allocations, use the dedicated huge arena if both are true:
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* 1) is using auto arena selection (i.e. arena == NULL), and 2) the
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* thread is not assigned to a manual arena.
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*/
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if (unlikely(size >= oversize_threshold)) {
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arena_t *tsd_arena = tsd_arena_get(tsd);
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if (tsd_arena == NULL || arena_is_auto(tsd_arena)) {
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return arena_choose_huge(tsd);
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}
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}
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return arena_choose(tsd, NULL);
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_prof_info_get(tsd_t *tsd, const void *ptr, emap_alloc_ctx_t *alloc_ctx,
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prof_info_t *prof_info, bool reset_recent) {
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cassert(config_prof);
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assert(ptr != NULL);
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assert(prof_info != NULL);
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edata_t *edata = NULL;
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bool is_slab;
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/* Static check. */
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if (alloc_ctx == NULL) {
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edata = emap_edata_lookup(tsd_tsdn(tsd), &arena_emap_global,
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ptr);
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is_slab = edata_slab_get(edata);
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} else if (unlikely(!(is_slab = alloc_ctx->slab))) {
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edata = emap_edata_lookup(tsd_tsdn(tsd), &arena_emap_global,
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ptr);
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}
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if (unlikely(!is_slab)) {
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/* edata must have been initialized at this point. */
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assert(edata != NULL);
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large_prof_info_get(tsd, edata, prof_info, reset_recent);
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} else {
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prof_info->alloc_tctx = (prof_tctx_t *)(uintptr_t)1U;
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/*
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* No need to set other fields in prof_info; they will never be
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* accessed if (uintptr_t)alloc_tctx == (uintptr_t)1U.
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*/
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}
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_prof_tctx_reset(tsd_t *tsd, const void *ptr,
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emap_alloc_ctx_t *alloc_ctx) {
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cassert(config_prof);
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assert(ptr != NULL);
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/* Static check. */
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if (alloc_ctx == NULL) {
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edata_t *edata = emap_edata_lookup(tsd_tsdn(tsd),
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&arena_emap_global, ptr);
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if (unlikely(!edata_slab_get(edata))) {
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large_prof_tctx_reset(edata);
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}
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} else {
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if (unlikely(!alloc_ctx->slab)) {
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edata_t *edata = emap_edata_lookup(tsd_tsdn(tsd),
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&arena_emap_global, ptr);
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large_prof_tctx_reset(edata);
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}
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}
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_prof_tctx_reset_sampled(tsd_t *tsd, const void *ptr) {
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cassert(config_prof);
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assert(ptr != NULL);
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edata_t *edata = emap_edata_lookup(tsd_tsdn(tsd), &arena_emap_global,
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ptr);
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assert(!edata_slab_get(edata));
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large_prof_tctx_reset(edata);
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_prof_info_set(tsd_t *tsd, edata_t *edata, prof_tctx_t *tctx) {
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cassert(config_prof);
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assert(!edata_slab_get(edata));
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large_prof_info_set(edata, tctx);
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_decay_ticks(tsdn_t *tsdn, arena_t *arena, unsigned nticks) {
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tsd_t *tsd;
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ticker_t *decay_ticker;
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if (unlikely(tsdn_null(tsdn))) {
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return;
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}
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tsd = tsdn_tsd(tsdn);
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decay_ticker = decay_ticker_get(tsd, arena_ind_get(arena));
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if (unlikely(decay_ticker == NULL)) {
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return;
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}
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if (unlikely(ticker_ticks(decay_ticker, nticks))) {
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arena_decay(tsdn, arena, false, false);
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}
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_decay_tick(tsdn_t *tsdn, arena_t *arena) {
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arena_decay_ticks(tsdn, arena, 1);
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}
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JEMALLOC_ALWAYS_INLINE void *
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arena_malloc(tsdn_t *tsdn, arena_t *arena, size_t size, szind_t ind, bool zero,
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tcache_t *tcache, bool slow_path) {
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assert(!tsdn_null(tsdn) || tcache == NULL);
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if (likely(tcache != NULL)) {
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if (likely(size <= SC_SMALL_MAXCLASS)) {
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return tcache_alloc_small(tsdn_tsd(tsdn), arena,
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tcache, size, ind, zero, slow_path);
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}
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if (likely(size <= tcache_maxclass)) {
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return tcache_alloc_large(tsdn_tsd(tsdn), arena,
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tcache, size, ind, zero, slow_path);
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}
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/* (size > tcache_maxclass) case falls through. */
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assert(size > tcache_maxclass);
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}
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return arena_malloc_hard(tsdn, arena, size, ind, zero);
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}
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JEMALLOC_ALWAYS_INLINE arena_t *
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arena_aalloc(tsdn_t *tsdn, const void *ptr) {
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edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global, ptr);
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unsigned arena_ind = edata_arena_ind_get(edata);
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return (arena_t *)atomic_load_p(&arenas[arena_ind], ATOMIC_RELAXED);
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}
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JEMALLOC_ALWAYS_INLINE size_t
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arena_salloc(tsdn_t *tsdn, const void *ptr) {
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assert(ptr != NULL);
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emap_alloc_ctx_t alloc_ctx;
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emap_alloc_ctx_lookup(tsdn, &arena_emap_global, ptr, &alloc_ctx);
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assert(alloc_ctx.szind != SC_NSIZES);
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return sz_index2size(alloc_ctx.szind);
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}
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JEMALLOC_ALWAYS_INLINE size_t
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arena_vsalloc(tsdn_t *tsdn, const void *ptr) {
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/*
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* Return 0 if ptr is not within an extent managed by jemalloc. This
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* function has two extra costs relative to isalloc():
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* - The rtree calls cannot claim to be dependent lookups, which induces
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* rtree lookup load dependencies.
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* - The lookup may fail, so there is an extra branch to check for
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* failure.
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*/
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emap_full_alloc_ctx_t full_alloc_ctx;
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bool missing = emap_full_alloc_ctx_try_lookup(tsdn, &arena_emap_global,
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ptr, &full_alloc_ctx);
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if (missing) {
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return 0;
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}
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if (full_alloc_ctx.edata == NULL) {
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return 0;
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}
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assert(edata_state_get(full_alloc_ctx.edata) == extent_state_active);
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/* Only slab members should be looked up via interior pointers. */
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assert(edata_addr_get(full_alloc_ctx.edata) == ptr
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|| edata_slab_get(full_alloc_ctx.edata));
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assert(full_alloc_ctx.szind != SC_NSIZES);
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return sz_index2size(full_alloc_ctx.szind);
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}
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static inline void
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arena_dalloc_large_no_tcache(tsdn_t *tsdn, void *ptr, szind_t szind) {
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if (config_prof && unlikely(szind < SC_NBINS)) {
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arena_dalloc_promoted(tsdn, ptr, NULL, true);
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} else {
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edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global,
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ptr);
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large_dalloc(tsdn, edata);
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}
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}
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static inline void
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arena_dalloc_no_tcache(tsdn_t *tsdn, void *ptr) {
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assert(ptr != NULL);
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emap_alloc_ctx_t alloc_ctx;
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emap_alloc_ctx_lookup(tsdn, &arena_emap_global, ptr, &alloc_ctx);
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if (config_debug) {
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edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global,
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ptr);
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assert(alloc_ctx.szind == edata_szind_get(edata));
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assert(alloc_ctx.szind < SC_NSIZES);
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assert(alloc_ctx.slab == edata_slab_get(edata));
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}
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if (likely(alloc_ctx.slab)) {
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/* Small allocation. */
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arena_dalloc_small(tsdn, ptr);
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} else {
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arena_dalloc_large_no_tcache(tsdn, ptr, alloc_ctx.szind);
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}
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_dalloc_large(tsdn_t *tsdn, void *ptr, tcache_t *tcache, szind_t szind,
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bool slow_path) {
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if (szind < nhbins) {
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if (config_prof && unlikely(szind < SC_NBINS)) {
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arena_dalloc_promoted(tsdn, ptr, tcache, slow_path);
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} else {
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tcache_dalloc_large(tsdn_tsd(tsdn), tcache, ptr, szind,
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slow_path);
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}
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} else {
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edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global,
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ptr);
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large_dalloc(tsdn, edata);
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}
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_dalloc(tsdn_t *tsdn, void *ptr, tcache_t *tcache,
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emap_alloc_ctx_t *caller_alloc_ctx, bool slow_path) {
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assert(!tsdn_null(tsdn) || tcache == NULL);
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assert(ptr != NULL);
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if (unlikely(tcache == NULL)) {
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arena_dalloc_no_tcache(tsdn, ptr);
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return;
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}
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emap_alloc_ctx_t alloc_ctx;
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if (caller_alloc_ctx != NULL) {
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alloc_ctx = *caller_alloc_ctx;
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} else {
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util_assume(!tsdn_null(tsdn));
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emap_alloc_ctx_lookup(tsdn, &arena_emap_global, ptr,
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&alloc_ctx);
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}
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if (config_debug) {
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edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global,
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ptr);
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assert(alloc_ctx.szind == edata_szind_get(edata));
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assert(alloc_ctx.szind < SC_NSIZES);
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assert(alloc_ctx.slab == edata_slab_get(edata));
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}
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if (likely(alloc_ctx.slab)) {
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/* Small allocation. */
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tcache_dalloc_small(tsdn_tsd(tsdn), tcache, ptr,
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alloc_ctx.szind, slow_path);
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} else {
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arena_dalloc_large(tsdn, ptr, tcache, alloc_ctx.szind,
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slow_path);
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}
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}
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static inline void
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arena_sdalloc_no_tcache(tsdn_t *tsdn, void *ptr, size_t size) {
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assert(ptr != NULL);
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assert(size <= SC_LARGE_MAXCLASS);
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emap_alloc_ctx_t alloc_ctx;
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if (!config_prof || !opt_prof) {
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/*
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* There is no risk of being confused by a promoted sampled
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* object, so base szind and slab on the given size.
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*/
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alloc_ctx.szind = sz_size2index(size);
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alloc_ctx.slab = (alloc_ctx.szind < SC_NBINS);
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}
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if ((config_prof && opt_prof) || config_debug) {
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emap_alloc_ctx_lookup(tsdn, &arena_emap_global, ptr,
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&alloc_ctx);
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assert(alloc_ctx.szind == sz_size2index(size));
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assert((config_prof && opt_prof)
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|| alloc_ctx.slab == (alloc_ctx.szind < SC_NBINS));
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if (config_debug) {
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edata_t *edata = emap_edata_lookup(tsdn,
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&arena_emap_global, ptr);
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assert(alloc_ctx.szind == edata_szind_get(edata));
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assert(alloc_ctx.slab == edata_slab_get(edata));
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}
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}
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if (likely(alloc_ctx.slab)) {
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/* Small allocation. */
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arena_dalloc_small(tsdn, ptr);
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} else {
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arena_dalloc_large_no_tcache(tsdn, ptr, alloc_ctx.szind);
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}
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}
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JEMALLOC_ALWAYS_INLINE void
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arena_sdalloc(tsdn_t *tsdn, void *ptr, size_t size, tcache_t *tcache,
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emap_alloc_ctx_t *caller_alloc_ctx, bool slow_path) {
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assert(!tsdn_null(tsdn) || tcache == NULL);
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assert(ptr != NULL);
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assert(size <= SC_LARGE_MAXCLASS);
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if (unlikely(tcache == NULL)) {
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arena_sdalloc_no_tcache(tsdn, ptr, size);
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return;
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}
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emap_alloc_ctx_t alloc_ctx;
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if (config_prof && opt_prof) {
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if (caller_alloc_ctx == NULL) {
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/* Uncommon case and should be a static check. */
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emap_alloc_ctx_lookup(tsdn, &arena_emap_global, ptr,
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&alloc_ctx);
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assert(alloc_ctx.szind == sz_size2index(size));
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} else {
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alloc_ctx = *caller_alloc_ctx;
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}
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} else {
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/*
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* There is no risk of being confused by a promoted sampled
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* object, so base szind and slab on the given size.
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*/
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alloc_ctx.szind = sz_size2index(size);
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alloc_ctx.slab = (alloc_ctx.szind < SC_NBINS);
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}
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if (config_debug) {
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edata_t *edata = emap_edata_lookup(tsdn, &arena_emap_global,
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ptr);
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assert(alloc_ctx.szind == edata_szind_get(edata));
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assert(alloc_ctx.slab == edata_slab_get(edata));
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}
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if (likely(alloc_ctx.slab)) {
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/* Small allocation. */
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tcache_dalloc_small(tsdn_tsd(tsdn), tcache, ptr,
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alloc_ctx.szind, slow_path);
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} else {
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arena_dalloc_large(tsdn, ptr, tcache, alloc_ctx.szind,
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slow_path);
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}
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}
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static inline void
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arena_cache_oblivious_randomize(tsdn_t *tsdn, arena_t *arena, edata_t *edata,
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size_t alignment) {
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assert(edata_base_get(edata) == edata_addr_get(edata));
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if (alignment < PAGE) {
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unsigned lg_range = LG_PAGE -
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lg_floor(CACHELINE_CEILING(alignment));
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size_t r;
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if (!tsdn_null(tsdn)) {
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tsd_t *tsd = tsdn_tsd(tsdn);
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r = (size_t)prng_lg_range_u64(
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tsd_prng_statep_get(tsd), lg_range);
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} else {
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uint64_t stack_value = (uint64_t)(uintptr_t)&r;
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r = (size_t)prng_lg_range_u64(&stack_value, lg_range);
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}
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uintptr_t random_offset = ((uintptr_t)r) << (LG_PAGE -
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lg_range);
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edata->e_addr = (void *)((uintptr_t)edata->e_addr +
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random_offset);
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assert(ALIGNMENT_ADDR2BASE(edata->e_addr, alignment) ==
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edata->e_addr);
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}
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}
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#endif /* JEMALLOC_INTERNAL_ARENA_INLINES_B_H */
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