diff options
Diffstat (limited to 'deps/jemalloc/src/ctl.c')
| -rw-r--r-- | deps/jemalloc/src/ctl.c | 3435 |
1 files changed, 3435 insertions, 0 deletions
diff --git a/deps/jemalloc/src/ctl.c b/deps/jemalloc/src/ctl.c new file mode 100644 index 0000000..48afaa6 --- /dev/null +++ b/deps/jemalloc/src/ctl.c @@ -0,0 +1,3435 @@ +#define JEMALLOC_CTL_C_ +#include "jemalloc/internal/jemalloc_preamble.h" +#include "jemalloc/internal/jemalloc_internal_includes.h" + +#include "jemalloc/internal/assert.h" +#include "jemalloc/internal/ctl.h" +#include "jemalloc/internal/extent_dss.h" +#include "jemalloc/internal/extent_mmap.h" +#include "jemalloc/internal/mutex.h" +#include "jemalloc/internal/nstime.h" +#include "jemalloc/internal/sc.h" +#include "jemalloc/internal/util.h" + +/******************************************************************************/ +/* Data. */ + +/* + * ctl_mtx protects the following: + * - ctl_stats->* + */ +static malloc_mutex_t ctl_mtx; +static bool ctl_initialized; +static ctl_stats_t *ctl_stats; +static ctl_arenas_t *ctl_arenas; + +/******************************************************************************/ +/* Helpers for named and indexed nodes. */ + +static const ctl_named_node_t * +ctl_named_node(const ctl_node_t *node) { + return ((node->named) ? (const ctl_named_node_t *)node : NULL); +} + +static const ctl_named_node_t * +ctl_named_children(const ctl_named_node_t *node, size_t index) { + const ctl_named_node_t *children = ctl_named_node(node->children); + + return (children ? &children[index] : NULL); +} + +static const ctl_indexed_node_t * +ctl_indexed_node(const ctl_node_t *node) { + return (!node->named ? (const ctl_indexed_node_t *)node : NULL); +} + +/******************************************************************************/ +/* Function prototypes for non-inline static functions. */ + +#define CTL_PROTO(n) \ +static int n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, \ + void *oldp, size_t *oldlenp, void *newp, size_t newlen); + +#define INDEX_PROTO(n) \ +static const ctl_named_node_t *n##_index(tsdn_t *tsdn, \ + const size_t *mib, size_t miblen, size_t i); + +CTL_PROTO(version) +CTL_PROTO(epoch) +CTL_PROTO(background_thread) +CTL_PROTO(max_background_threads) +CTL_PROTO(thread_tcache_enabled) +CTL_PROTO(thread_tcache_flush) +CTL_PROTO(thread_prof_name) +CTL_PROTO(thread_prof_active) +CTL_PROTO(thread_arena) +CTL_PROTO(thread_allocated) +CTL_PROTO(thread_allocatedp) +CTL_PROTO(thread_deallocated) +CTL_PROTO(thread_deallocatedp) +CTL_PROTO(config_cache_oblivious) +CTL_PROTO(config_debug) +CTL_PROTO(config_fill) +CTL_PROTO(config_lazy_lock) +CTL_PROTO(config_malloc_conf) +CTL_PROTO(config_opt_safety_checks) +CTL_PROTO(config_prof) +CTL_PROTO(config_prof_libgcc) +CTL_PROTO(config_prof_libunwind) +CTL_PROTO(config_stats) +CTL_PROTO(config_utrace) +CTL_PROTO(config_xmalloc) +CTL_PROTO(opt_abort) +CTL_PROTO(opt_abort_conf) +CTL_PROTO(opt_confirm_conf) +CTL_PROTO(opt_metadata_thp) +CTL_PROTO(opt_retain) +CTL_PROTO(opt_dss) +CTL_PROTO(opt_narenas) +CTL_PROTO(opt_percpu_arena) +CTL_PROTO(opt_oversize_threshold) +CTL_PROTO(opt_background_thread) +CTL_PROTO(opt_max_background_threads) +CTL_PROTO(opt_dirty_decay_ms) +CTL_PROTO(opt_muzzy_decay_ms) +CTL_PROTO(opt_stats_print) +CTL_PROTO(opt_stats_print_opts) +CTL_PROTO(opt_junk) +CTL_PROTO(opt_zero) +CTL_PROTO(opt_utrace) +CTL_PROTO(opt_xmalloc) +CTL_PROTO(opt_tcache) +CTL_PROTO(opt_thp) +CTL_PROTO(opt_lg_extent_max_active_fit) +CTL_PROTO(opt_lg_tcache_max) +CTL_PROTO(opt_prof) +CTL_PROTO(opt_prof_prefix) +CTL_PROTO(opt_prof_active) +CTL_PROTO(opt_prof_thread_active_init) +CTL_PROTO(opt_lg_prof_sample) +CTL_PROTO(opt_lg_prof_interval) +CTL_PROTO(opt_prof_gdump) +CTL_PROTO(opt_prof_final) +CTL_PROTO(opt_prof_leak) +CTL_PROTO(opt_prof_accum) +CTL_PROTO(tcache_create) +CTL_PROTO(tcache_flush) +CTL_PROTO(tcache_destroy) +CTL_PROTO(arena_i_initialized) +CTL_PROTO(arena_i_decay) +CTL_PROTO(arena_i_purge) +CTL_PROTO(arena_i_reset) +CTL_PROTO(arena_i_destroy) +CTL_PROTO(arena_i_dss) +CTL_PROTO(arena_i_dirty_decay_ms) +CTL_PROTO(arena_i_muzzy_decay_ms) +CTL_PROTO(arena_i_extent_hooks) +CTL_PROTO(arena_i_retain_grow_limit) +INDEX_PROTO(arena_i) +CTL_PROTO(arenas_bin_i_size) +CTL_PROTO(arenas_bin_i_nregs) +CTL_PROTO(arenas_bin_i_slab_size) +CTL_PROTO(arenas_bin_i_nshards) +INDEX_PROTO(arenas_bin_i) +CTL_PROTO(arenas_lextent_i_size) +INDEX_PROTO(arenas_lextent_i) +CTL_PROTO(arenas_narenas) +CTL_PROTO(arenas_dirty_decay_ms) +CTL_PROTO(arenas_muzzy_decay_ms) +CTL_PROTO(arenas_quantum) +CTL_PROTO(arenas_page) +CTL_PROTO(arenas_tcache_max) +CTL_PROTO(arenas_nbins) +CTL_PROTO(arenas_nhbins) +CTL_PROTO(arenas_nlextents) +CTL_PROTO(arenas_create) +CTL_PROTO(arenas_lookup) +CTL_PROTO(prof_thread_active_init) +CTL_PROTO(prof_active) +CTL_PROTO(prof_dump) +CTL_PROTO(prof_gdump) +CTL_PROTO(prof_reset) +CTL_PROTO(prof_interval) +CTL_PROTO(lg_prof_sample) +CTL_PROTO(prof_log_start) +CTL_PROTO(prof_log_stop) +CTL_PROTO(stats_arenas_i_small_allocated) +CTL_PROTO(stats_arenas_i_small_nmalloc) +CTL_PROTO(stats_arenas_i_small_ndalloc) +CTL_PROTO(stats_arenas_i_small_nrequests) +CTL_PROTO(stats_arenas_i_small_nfills) +CTL_PROTO(stats_arenas_i_small_nflushes) +CTL_PROTO(stats_arenas_i_large_allocated) +CTL_PROTO(stats_arenas_i_large_nmalloc) +CTL_PROTO(stats_arenas_i_large_ndalloc) +CTL_PROTO(stats_arenas_i_large_nrequests) +CTL_PROTO(stats_arenas_i_large_nfills) +CTL_PROTO(stats_arenas_i_large_nflushes) +CTL_PROTO(stats_arenas_i_bins_j_nmalloc) +CTL_PROTO(stats_arenas_i_bins_j_ndalloc) +CTL_PROTO(stats_arenas_i_bins_j_nrequests) +CTL_PROTO(stats_arenas_i_bins_j_curregs) +CTL_PROTO(stats_arenas_i_bins_j_nfills) +CTL_PROTO(stats_arenas_i_bins_j_nflushes) +CTL_PROTO(stats_arenas_i_bins_j_nslabs) +CTL_PROTO(stats_arenas_i_bins_j_nreslabs) +CTL_PROTO(stats_arenas_i_bins_j_curslabs) +CTL_PROTO(stats_arenas_i_bins_j_nonfull_slabs) +INDEX_PROTO(stats_arenas_i_bins_j) +CTL_PROTO(stats_arenas_i_lextents_j_nmalloc) +CTL_PROTO(stats_arenas_i_lextents_j_ndalloc) +CTL_PROTO(stats_arenas_i_lextents_j_nrequests) +CTL_PROTO(stats_arenas_i_lextents_j_curlextents) +INDEX_PROTO(stats_arenas_i_lextents_j) +CTL_PROTO(stats_arenas_i_extents_j_ndirty) +CTL_PROTO(stats_arenas_i_extents_j_nmuzzy) +CTL_PROTO(stats_arenas_i_extents_j_nretained) +CTL_PROTO(stats_arenas_i_extents_j_dirty_bytes) +CTL_PROTO(stats_arenas_i_extents_j_muzzy_bytes) +CTL_PROTO(stats_arenas_i_extents_j_retained_bytes) +INDEX_PROTO(stats_arenas_i_extents_j) +CTL_PROTO(stats_arenas_i_nthreads) +CTL_PROTO(stats_arenas_i_uptime) +CTL_PROTO(stats_arenas_i_dss) +CTL_PROTO(stats_arenas_i_dirty_decay_ms) +CTL_PROTO(stats_arenas_i_muzzy_decay_ms) +CTL_PROTO(stats_arenas_i_pactive) +CTL_PROTO(stats_arenas_i_pdirty) +CTL_PROTO(stats_arenas_i_pmuzzy) +CTL_PROTO(stats_arenas_i_mapped) +CTL_PROTO(stats_arenas_i_retained) +CTL_PROTO(stats_arenas_i_extent_avail) +CTL_PROTO(stats_arenas_i_dirty_npurge) +CTL_PROTO(stats_arenas_i_dirty_nmadvise) +CTL_PROTO(stats_arenas_i_dirty_purged) +CTL_PROTO(stats_arenas_i_muzzy_npurge) +CTL_PROTO(stats_arenas_i_muzzy_nmadvise) +CTL_PROTO(stats_arenas_i_muzzy_purged) +CTL_PROTO(stats_arenas_i_base) +CTL_PROTO(stats_arenas_i_internal) +CTL_PROTO(stats_arenas_i_metadata_thp) +CTL_PROTO(stats_arenas_i_tcache_bytes) +CTL_PROTO(stats_arenas_i_resident) +CTL_PROTO(stats_arenas_i_abandoned_vm) +INDEX_PROTO(stats_arenas_i) +CTL_PROTO(stats_allocated) +CTL_PROTO(stats_active) +CTL_PROTO(stats_background_thread_num_threads) +CTL_PROTO(stats_background_thread_num_runs) +CTL_PROTO(stats_background_thread_run_interval) +CTL_PROTO(stats_metadata) +CTL_PROTO(stats_metadata_thp) +CTL_PROTO(stats_resident) +CTL_PROTO(stats_mapped) +CTL_PROTO(stats_retained) +CTL_PROTO(experimental_hooks_install) +CTL_PROTO(experimental_hooks_remove) +CTL_PROTO(experimental_utilization_query) +CTL_PROTO(experimental_utilization_batch_query) +CTL_PROTO(experimental_arenas_i_pactivep) +INDEX_PROTO(experimental_arenas_i) + +#define MUTEX_STATS_CTL_PROTO_GEN(n) \ +CTL_PROTO(stats_##n##_num_ops) \ +CTL_PROTO(stats_##n##_num_wait) \ +CTL_PROTO(stats_##n##_num_spin_acq) \ +CTL_PROTO(stats_##n##_num_owner_switch) \ +CTL_PROTO(stats_##n##_total_wait_time) \ +CTL_PROTO(stats_##n##_max_wait_time) \ +CTL_PROTO(stats_##n##_max_num_thds) + +/* Global mutexes. */ +#define OP(mtx) MUTEX_STATS_CTL_PROTO_GEN(mutexes_##mtx) +MUTEX_PROF_GLOBAL_MUTEXES +#undef OP + +/* Per arena mutexes. */ +#define OP(mtx) MUTEX_STATS_CTL_PROTO_GEN(arenas_i_mutexes_##mtx) +MUTEX_PROF_ARENA_MUTEXES +#undef OP + +/* Arena bin mutexes. */ +MUTEX_STATS_CTL_PROTO_GEN(arenas_i_bins_j_mutex) +#undef MUTEX_STATS_CTL_PROTO_GEN + +CTL_PROTO(stats_mutexes_reset) + +/******************************************************************************/ +/* mallctl tree. */ + +#define NAME(n) {true}, n +#define CHILD(t, c) \ + sizeof(c##_node) / sizeof(ctl_##t##_node_t), \ + (ctl_node_t *)c##_node, \ + NULL +#define CTL(c) 0, NULL, c##_ctl + +/* + * Only handles internal indexed nodes, since there are currently no external + * ones. + */ +#define INDEX(i) {false}, i##_index + +static const ctl_named_node_t thread_tcache_node[] = { + {NAME("enabled"), CTL(thread_tcache_enabled)}, + {NAME("flush"), CTL(thread_tcache_flush)} +}; + +static const ctl_named_node_t thread_prof_node[] = { + {NAME("name"), CTL(thread_prof_name)}, + {NAME("active"), CTL(thread_prof_active)} +}; + +static const ctl_named_node_t thread_node[] = { + {NAME("arena"), CTL(thread_arena)}, + {NAME("allocated"), CTL(thread_allocated)}, + {NAME("allocatedp"), CTL(thread_allocatedp)}, + {NAME("deallocated"), CTL(thread_deallocated)}, + {NAME("deallocatedp"), CTL(thread_deallocatedp)}, + {NAME("tcache"), CHILD(named, thread_tcache)}, + {NAME("prof"), CHILD(named, thread_prof)} +}; + +static const ctl_named_node_t config_node[] = { + {NAME("cache_oblivious"), CTL(config_cache_oblivious)}, + {NAME("debug"), CTL(config_debug)}, + {NAME("fill"), CTL(config_fill)}, + {NAME("lazy_lock"), CTL(config_lazy_lock)}, + {NAME("malloc_conf"), CTL(config_malloc_conf)}, + {NAME("opt_safety_checks"), CTL(config_opt_safety_checks)}, + {NAME("prof"), CTL(config_prof)}, + {NAME("prof_libgcc"), CTL(config_prof_libgcc)}, + {NAME("prof_libunwind"), CTL(config_prof_libunwind)}, + {NAME("stats"), CTL(config_stats)}, + {NAME("utrace"), CTL(config_utrace)}, + {NAME("xmalloc"), CTL(config_xmalloc)} +}; + +static const ctl_named_node_t opt_node[] = { + {NAME("abort"), CTL(opt_abort)}, + {NAME("abort_conf"), CTL(opt_abort_conf)}, + {NAME("confirm_conf"), CTL(opt_confirm_conf)}, + {NAME("metadata_thp"), CTL(opt_metadata_thp)}, + {NAME("retain"), CTL(opt_retain)}, + {NAME("dss"), CTL(opt_dss)}, + {NAME("narenas"), CTL(opt_narenas)}, + {NAME("percpu_arena"), CTL(opt_percpu_arena)}, + {NAME("oversize_threshold"), CTL(opt_oversize_threshold)}, + {NAME("background_thread"), CTL(opt_background_thread)}, + {NAME("max_background_threads"), CTL(opt_max_background_threads)}, + {NAME("dirty_decay_ms"), CTL(opt_dirty_decay_ms)}, + {NAME("muzzy_decay_ms"), CTL(opt_muzzy_decay_ms)}, + {NAME("stats_print"), CTL(opt_stats_print)}, + {NAME("stats_print_opts"), CTL(opt_stats_print_opts)}, + {NAME("junk"), CTL(opt_junk)}, + {NAME("zero"), CTL(opt_zero)}, + {NAME("utrace"), CTL(opt_utrace)}, + {NAME("xmalloc"), CTL(opt_xmalloc)}, + {NAME("tcache"), CTL(opt_tcache)}, + {NAME("thp"), CTL(opt_thp)}, + {NAME("lg_extent_max_active_fit"), CTL(opt_lg_extent_max_active_fit)}, + {NAME("lg_tcache_max"), CTL(opt_lg_tcache_max)}, + {NAME("prof"), CTL(opt_prof)}, + {NAME("prof_prefix"), CTL(opt_prof_prefix)}, + {NAME("prof_active"), CTL(opt_prof_active)}, + {NAME("prof_thread_active_init"), CTL(opt_prof_thread_active_init)}, + {NAME("lg_prof_sample"), CTL(opt_lg_prof_sample)}, + {NAME("lg_prof_interval"), CTL(opt_lg_prof_interval)}, + {NAME("prof_gdump"), CTL(opt_prof_gdump)}, + {NAME("prof_final"), CTL(opt_prof_final)}, + {NAME("prof_leak"), CTL(opt_prof_leak)}, + {NAME("prof_accum"), CTL(opt_prof_accum)} +}; + +static const ctl_named_node_t tcache_node[] = { + {NAME("create"), CTL(tcache_create)}, + {NAME("flush"), CTL(tcache_flush)}, + {NAME("destroy"), CTL(tcache_destroy)} +}; + +static const ctl_named_node_t arena_i_node[] = { + {NAME("initialized"), CTL(arena_i_initialized)}, + {NAME("decay"), CTL(arena_i_decay)}, + {NAME("purge"), CTL(arena_i_purge)}, + {NAME("reset"), CTL(arena_i_reset)}, + {NAME("destroy"), CTL(arena_i_destroy)}, + {NAME("dss"), CTL(arena_i_dss)}, + {NAME("dirty_decay_ms"), CTL(arena_i_dirty_decay_ms)}, + {NAME("muzzy_decay_ms"), CTL(arena_i_muzzy_decay_ms)}, + {NAME("extent_hooks"), CTL(arena_i_extent_hooks)}, + {NAME("retain_grow_limit"), CTL(arena_i_retain_grow_limit)} +}; +static const ctl_named_node_t super_arena_i_node[] = { + {NAME(""), CHILD(named, arena_i)} +}; + +static const ctl_indexed_node_t arena_node[] = { + {INDEX(arena_i)} +}; + +static const ctl_named_node_t arenas_bin_i_node[] = { + {NAME("size"), CTL(arenas_bin_i_size)}, + {NAME("nregs"), CTL(arenas_bin_i_nregs)}, + {NAME("slab_size"), CTL(arenas_bin_i_slab_size)}, + {NAME("nshards"), CTL(arenas_bin_i_nshards)} +}; +static const ctl_named_node_t super_arenas_bin_i_node[] = { + {NAME(""), CHILD(named, arenas_bin_i)} +}; + +static const ctl_indexed_node_t arenas_bin_node[] = { + {INDEX(arenas_bin_i)} +}; + +static const ctl_named_node_t arenas_lextent_i_node[] = { + {NAME("size"), CTL(arenas_lextent_i_size)} +}; +static const ctl_named_node_t super_arenas_lextent_i_node[] = { + {NAME(""), CHILD(named, arenas_lextent_i)} +}; + +static const ctl_indexed_node_t arenas_lextent_node[] = { + {INDEX(arenas_lextent_i)} +}; + +static const ctl_named_node_t arenas_node[] = { + {NAME("narenas"), CTL(arenas_narenas)}, + {NAME("dirty_decay_ms"), CTL(arenas_dirty_decay_ms)}, + {NAME("muzzy_decay_ms"), CTL(arenas_muzzy_decay_ms)}, + {NAME("quantum"), CTL(arenas_quantum)}, + {NAME("page"), CTL(arenas_page)}, + {NAME("tcache_max"), CTL(arenas_tcache_max)}, + {NAME("nbins"), CTL(arenas_nbins)}, + {NAME("nhbins"), CTL(arenas_nhbins)}, + {NAME("bin"), CHILD(indexed, arenas_bin)}, + {NAME("nlextents"), CTL(arenas_nlextents)}, + {NAME("lextent"), CHILD(indexed, arenas_lextent)}, + {NAME("create"), CTL(arenas_create)}, + {NAME("lookup"), CTL(arenas_lookup)} +}; + +static const ctl_named_node_t prof_node[] = { + {NAME("thread_active_init"), CTL(prof_thread_active_init)}, + {NAME("active"), CTL(prof_active)}, + {NAME("dump"), CTL(prof_dump)}, + {NAME("gdump"), CTL(prof_gdump)}, + {NAME("reset"), CTL(prof_reset)}, + {NAME("interval"), CTL(prof_interval)}, + {NAME("lg_sample"), CTL(lg_prof_sample)}, + {NAME("log_start"), CTL(prof_log_start)}, + {NAME("log_stop"), CTL(prof_log_stop)} +}; +static const ctl_named_node_t stats_arenas_i_small_node[] = { + {NAME("allocated"), CTL(stats_arenas_i_small_allocated)}, + {NAME("nmalloc"), CTL(stats_arenas_i_small_nmalloc)}, + {NAME("ndalloc"), CTL(stats_arenas_i_small_ndalloc)}, + {NAME("nrequests"), CTL(stats_arenas_i_small_nrequests)}, + {NAME("nfills"), CTL(stats_arenas_i_small_nfills)}, + {NAME("nflushes"), CTL(stats_arenas_i_small_nflushes)} +}; + +static const ctl_named_node_t stats_arenas_i_large_node[] = { + {NAME("allocated"), CTL(stats_arenas_i_large_allocated)}, + {NAME("nmalloc"), CTL(stats_arenas_i_large_nmalloc)}, + {NAME("ndalloc"), CTL(stats_arenas_i_large_ndalloc)}, + {NAME("nrequests"), CTL(stats_arenas_i_large_nrequests)}, + {NAME("nfills"), CTL(stats_arenas_i_large_nfills)}, + {NAME("nflushes"), CTL(stats_arenas_i_large_nflushes)} +}; + +#define MUTEX_PROF_DATA_NODE(prefix) \ +static const ctl_named_node_t stats_##prefix##_node[] = { \ + {NAME("num_ops"), \ + CTL(stats_##prefix##_num_ops)}, \ + {NAME("num_wait"), \ + CTL(stats_##prefix##_num_wait)}, \ + {NAME("num_spin_acq"), \ + CTL(stats_##prefix##_num_spin_acq)}, \ + {NAME("num_owner_switch"), \ + CTL(stats_##prefix##_num_owner_switch)}, \ + {NAME("total_wait_time"), \ + CTL(stats_##prefix##_total_wait_time)}, \ + {NAME("max_wait_time"), \ + CTL(stats_##prefix##_max_wait_time)}, \ + {NAME("max_num_thds"), \ + CTL(stats_##prefix##_max_num_thds)} \ + /* Note that # of current waiting thread not provided. */ \ +}; + +MUTEX_PROF_DATA_NODE(arenas_i_bins_j_mutex) + +static const ctl_named_node_t stats_arenas_i_bins_j_node[] = { + {NAME("nmalloc"), CTL(stats_arenas_i_bins_j_nmalloc)}, + {NAME("ndalloc"), CTL(stats_arenas_i_bins_j_ndalloc)}, + {NAME("nrequests"), CTL(stats_arenas_i_bins_j_nrequests)}, + {NAME("curregs"), CTL(stats_arenas_i_bins_j_curregs)}, + {NAME("nfills"), CTL(stats_arenas_i_bins_j_nfills)}, + {NAME("nflushes"), CTL(stats_arenas_i_bins_j_nflushes)}, + {NAME("nslabs"), CTL(stats_arenas_i_bins_j_nslabs)}, + {NAME("nreslabs"), CTL(stats_arenas_i_bins_j_nreslabs)}, + {NAME("curslabs"), CTL(stats_arenas_i_bins_j_curslabs)}, + {NAME("nonfull_slabs"), CTL(stats_arenas_i_bins_j_nonfull_slabs)}, + {NAME("mutex"), CHILD(named, stats_arenas_i_bins_j_mutex)} +}; + +static const ctl_named_node_t super_stats_arenas_i_bins_j_node[] = { + {NAME(""), CHILD(named, stats_arenas_i_bins_j)} +}; + +static const ctl_indexed_node_t stats_arenas_i_bins_node[] = { + {INDEX(stats_arenas_i_bins_j)} +}; + +static const ctl_named_node_t stats_arenas_i_lextents_j_node[] = { + {NAME("nmalloc"), CTL(stats_arenas_i_lextents_j_nmalloc)}, + {NAME("ndalloc"), CTL(stats_arenas_i_lextents_j_ndalloc)}, + {NAME("nrequests"), CTL(stats_arenas_i_lextents_j_nrequests)}, + {NAME("curlextents"), CTL(stats_arenas_i_lextents_j_curlextents)} +}; +static const ctl_named_node_t super_stats_arenas_i_lextents_j_node[] = { + {NAME(""), CHILD(named, stats_arenas_i_lextents_j)} +}; + +static const ctl_indexed_node_t stats_arenas_i_lextents_node[] = { + {INDEX(stats_arenas_i_lextents_j)} +}; + +static const ctl_named_node_t stats_arenas_i_extents_j_node[] = { + {NAME("ndirty"), CTL(stats_arenas_i_extents_j_ndirty)}, + {NAME("nmuzzy"), CTL(stats_arenas_i_extents_j_nmuzzy)}, + {NAME("nretained"), CTL(stats_arenas_i_extents_j_nretained)}, + {NAME("dirty_bytes"), CTL(stats_arenas_i_extents_j_dirty_bytes)}, + {NAME("muzzy_bytes"), CTL(stats_arenas_i_extents_j_muzzy_bytes)}, + {NAME("retained_bytes"), CTL(stats_arenas_i_extents_j_retained_bytes)} +}; + +static const ctl_named_node_t super_stats_arenas_i_extents_j_node[] = { + {NAME(""), CHILD(named, stats_arenas_i_extents_j)} +}; + +static const ctl_indexed_node_t stats_arenas_i_extents_node[] = { + {INDEX(stats_arenas_i_extents_j)} +}; + +#define OP(mtx) MUTEX_PROF_DATA_NODE(arenas_i_mutexes_##mtx) +MUTEX_PROF_ARENA_MUTEXES +#undef OP + +static const ctl_named_node_t stats_arenas_i_mutexes_node[] = { +#define OP(mtx) {NAME(#mtx), CHILD(named, stats_arenas_i_mutexes_##mtx)}, +MUTEX_PROF_ARENA_MUTEXES +#undef OP +}; + +static const ctl_named_node_t stats_arenas_i_node[] = { + {NAME("nthreads"), CTL(stats_arenas_i_nthreads)}, + {NAME("uptime"), CTL(stats_arenas_i_uptime)}, + {NAME("dss"), CTL(stats_arenas_i_dss)}, + {NAME("dirty_decay_ms"), CTL(stats_arenas_i_dirty_decay_ms)}, + {NAME("muzzy_decay_ms"), CTL(stats_arenas_i_muzzy_decay_ms)}, + {NAME("pactive"), CTL(stats_arenas_i_pactive)}, + {NAME("pdirty"), CTL(stats_arenas_i_pdirty)}, + {NAME("pmuzzy"), CTL(stats_arenas_i_pmuzzy)}, + {NAME("mapped"), CTL(stats_arenas_i_mapped)}, + {NAME("retained"), CTL(stats_arenas_i_retained)}, + {NAME("extent_avail"), CTL(stats_arenas_i_extent_avail)}, + {NAME("dirty_npurge"), CTL(stats_arenas_i_dirty_npurge)}, + {NAME("dirty_nmadvise"), CTL(stats_arenas_i_dirty_nmadvise)}, + {NAME("dirty_purged"), CTL(stats_arenas_i_dirty_purged)}, + {NAME("muzzy_npurge"), CTL(stats_arenas_i_muzzy_npurge)}, + {NAME("muzzy_nmadvise"), CTL(stats_arenas_i_muzzy_nmadvise)}, + {NAME("muzzy_purged"), CTL(stats_arenas_i_muzzy_purged)}, + {NAME("base"), CTL(stats_arenas_i_base)}, + {NAME("internal"), CTL(stats_arenas_i_internal)}, + {NAME("metadata_thp"), CTL(stats_arenas_i_metadata_thp)}, + {NAME("tcache_bytes"), CTL(stats_arenas_i_tcache_bytes)}, + {NAME("resident"), CTL(stats_arenas_i_resident)}, + {NAME("abandoned_vm"), CTL(stats_arenas_i_abandoned_vm)}, + {NAME("small"), CHILD(named, stats_arenas_i_small)}, + {NAME("large"), CHILD(named, stats_arenas_i_large)}, + {NAME("bins"), CHILD(indexed, stats_arenas_i_bins)}, + {NAME("lextents"), CHILD(indexed, stats_arenas_i_lextents)}, + {NAME("extents"), CHILD(indexed, stats_arenas_i_extents)}, + {NAME("mutexes"), CHILD(named, stats_arenas_i_mutexes)} +}; +static const ctl_named_node_t super_stats_arenas_i_node[] = { + {NAME(""), CHILD(named, stats_arenas_i)} +}; + +static const ctl_indexed_node_t stats_arenas_node[] = { + {INDEX(stats_arenas_i)} +}; + +static const ctl_named_node_t stats_background_thread_node[] = { + {NAME("num_threads"), CTL(stats_background_thread_num_threads)}, + {NAME("num_runs"), CTL(stats_background_thread_num_runs)}, + {NAME("run_interval"), CTL(stats_background_thread_run_interval)} +}; + +#define OP(mtx) MUTEX_PROF_DATA_NODE(mutexes_##mtx) +MUTEX_PROF_GLOBAL_MUTEXES +#undef OP + +static const ctl_named_node_t stats_mutexes_node[] = { +#define OP(mtx) {NAME(#mtx), CHILD(named, stats_mutexes_##mtx)}, +MUTEX_PROF_GLOBAL_MUTEXES +#undef OP + {NAME("reset"), CTL(stats_mutexes_reset)} +}; +#undef MUTEX_PROF_DATA_NODE + +static const ctl_named_node_t stats_node[] = { + {NAME("allocated"), CTL(stats_allocated)}, + {NAME("active"), CTL(stats_active)}, + {NAME("metadata"), CTL(stats_metadata)}, + {NAME("metadata_thp"), CTL(stats_metadata_thp)}, + {NAME("resident"), CTL(stats_resident)}, + {NAME("mapped"), CTL(stats_mapped)}, + {NAME("retained"), CTL(stats_retained)}, + {NAME("background_thread"), + CHILD(named, stats_background_thread)}, + {NAME("mutexes"), CHILD(named, stats_mutexes)}, + {NAME("arenas"), CHILD(indexed, stats_arenas)} +}; + +static const ctl_named_node_t experimental_hooks_node[] = { + {NAME("install"), CTL(experimental_hooks_install)}, + {NAME("remove"), CTL(experimental_hooks_remove)} +}; + +static const ctl_named_node_t experimental_utilization_node[] = { + {NAME("query"), CTL(experimental_utilization_query)}, + {NAME("batch_query"), CTL(experimental_utilization_batch_query)} +}; + +static const ctl_named_node_t experimental_arenas_i_node[] = { + {NAME("pactivep"), CTL(experimental_arenas_i_pactivep)} +}; +static const ctl_named_node_t super_experimental_arenas_i_node[] = { + {NAME(""), CHILD(named, experimental_arenas_i)} +}; + +static const ctl_indexed_node_t experimental_arenas_node[] = { + {INDEX(experimental_arenas_i)} +}; + +static const ctl_named_node_t experimental_node[] = { + {NAME("hooks"), CHILD(named, experimental_hooks)}, + {NAME("utilization"), CHILD(named, experimental_utilization)}, + {NAME("arenas"), CHILD(indexed, experimental_arenas)} +}; + +static const ctl_named_node_t root_node[] = { + {NAME("version"), CTL(version)}, + {NAME("epoch"), CTL(epoch)}, + {NAME("background_thread"), CTL(background_thread)}, + {NAME("max_background_threads"), CTL(max_background_threads)}, + {NAME("thread"), CHILD(named, thread)}, + {NAME("config"), CHILD(named, config)}, + {NAME("opt"), CHILD(named, opt)}, + {NAME("tcache"), CHILD(named, tcache)}, + {NAME("arena"), CHILD(indexed, arena)}, + {NAME("arenas"), CHILD(named, arenas)}, + {NAME("prof"), CHILD(named, prof)}, + {NAME("stats"), CHILD(named, stats)}, + {NAME("experimental"), CHILD(named, experimental)} +}; +static const ctl_named_node_t super_root_node[] = { + {NAME(""), CHILD(named, root)} +}; + +#undef NAME +#undef CHILD +#undef CTL +#undef INDEX + +/******************************************************************************/ + +/* + * Sets *dst + *src non-atomically. This is safe, since everything is + * synchronized by the ctl mutex. + */ +static void +ctl_accum_arena_stats_u64(arena_stats_u64_t *dst, arena_stats_u64_t *src) { +#ifdef JEMALLOC_ATOMIC_U64 + uint64_t cur_dst = atomic_load_u64(dst, ATOMIC_RELAXED); + uint64_t cur_src = atomic_load_u64(src, ATOMIC_RELAXED); + atomic_store_u64(dst, cur_dst + cur_src, ATOMIC_RELAXED); +#else + *dst += *src; +#endif +} + +/* Likewise: with ctl mutex synchronization, reading is simple. */ +static uint64_t +ctl_arena_stats_read_u64(arena_stats_u64_t *p) { +#ifdef JEMALLOC_ATOMIC_U64 + return atomic_load_u64(p, ATOMIC_RELAXED); +#else + return *p; +#endif +} + +static void +accum_atomic_zu(atomic_zu_t *dst, atomic_zu_t *src) { + size_t cur_dst = atomic_load_zu(dst, ATOMIC_RELAXED); + size_t cur_src = atomic_load_zu(src, ATOMIC_RELAXED); + atomic_store_zu(dst, cur_dst + cur_src, ATOMIC_RELAXED); +} + +/******************************************************************************/ + +static unsigned +arenas_i2a_impl(size_t i, bool compat, bool validate) { + unsigned a; + + switch (i) { + case MALLCTL_ARENAS_ALL: + a = 0; + break; + case MALLCTL_ARENAS_DESTROYED: + a = 1; + break; + default: + if (compat && i == ctl_arenas->narenas) { + /* + * Provide deprecated backward compatibility for + * accessing the merged stats at index narenas rather + * than via MALLCTL_ARENAS_ALL. This is scheduled for + * removal in 6.0.0. + */ + a = 0; + } else if (validate && i >= ctl_arenas->narenas) { + a = UINT_MAX; + } else { + /* + * This function should never be called for an index + * more than one past the range of indices that have + * initialized ctl data. + */ + assert(i < ctl_arenas->narenas || (!validate && i == + ctl_arenas->narenas)); + a = (unsigned)i + 2; + } + break; + } + + return a; +} + +static unsigned +arenas_i2a(size_t i) { + return arenas_i2a_impl(i, true, false); +} + +static ctl_arena_t * +arenas_i_impl(tsd_t *tsd, size_t i, bool compat, bool init) { + ctl_arena_t *ret; + + assert(!compat || !init); + + ret = ctl_arenas->arenas[arenas_i2a_impl(i, compat, false)]; + if (init && ret == NULL) { + if (config_stats) { + struct container_s { + ctl_arena_t ctl_arena; + ctl_arena_stats_t astats; + }; + struct container_s *cont = + (struct container_s *)base_alloc(tsd_tsdn(tsd), + b0get(), sizeof(struct container_s), QUANTUM); + if (cont == NULL) { + return NULL; + } + ret = &cont->ctl_arena; + ret->astats = &cont->astats; + } else { + ret = (ctl_arena_t *)base_alloc(tsd_tsdn(tsd), b0get(), + sizeof(ctl_arena_t), QUANTUM); + if (ret == NULL) { + return NULL; + } + } + ret->arena_ind = (unsigned)i; + ctl_arenas->arenas[arenas_i2a_impl(i, compat, false)] = ret; + } + + assert(ret == NULL || arenas_i2a(ret->arena_ind) == arenas_i2a(i)); + return ret; +} + +static ctl_arena_t * +arenas_i(size_t i) { + ctl_arena_t *ret = arenas_i_impl(tsd_fetch(), i, true, false); + assert(ret != NULL); + return ret; +} + +static void +ctl_arena_clear(ctl_arena_t *ctl_arena) { + ctl_arena->nthreads = 0; + ctl_arena->dss = dss_prec_names[dss_prec_limit]; + ctl_arena->dirty_decay_ms = -1; + ctl_arena->muzzy_decay_ms = -1; + ctl_arena->pactive = 0; + ctl_arena->pdirty = 0; + ctl_arena->pmuzzy = 0; + if (config_stats) { + memset(&ctl_arena->astats->astats, 0, sizeof(arena_stats_t)); + ctl_arena->astats->allocated_small = 0; + ctl_arena->astats->nmalloc_small = 0; + ctl_arena->astats->ndalloc_small = 0; + ctl_arena->astats->nrequests_small = 0; + ctl_arena->astats->nfills_small = 0; + ctl_arena->astats->nflushes_small = 0; + memset(ctl_arena->astats->bstats, 0, SC_NBINS * + sizeof(bin_stats_t)); + memset(ctl_arena->astats->lstats, 0, (SC_NSIZES - SC_NBINS) * + sizeof(arena_stats_large_t)); + memset(ctl_arena->astats->estats, 0, SC_NPSIZES * + sizeof(arena_stats_extents_t)); + } +} + +static void +ctl_arena_stats_amerge(tsdn_t *tsdn, ctl_arena_t *ctl_arena, arena_t *arena) { + unsigned i; + + if (config_stats) { + arena_stats_merge(tsdn, arena, &ctl_arena->nthreads, + &ctl_arena->dss, &ctl_arena->dirty_decay_ms, + &ctl_arena->muzzy_decay_ms, &ctl_arena->pactive, + &ctl_arena->pdirty, &ctl_arena->pmuzzy, + &ctl_arena->astats->astats, ctl_arena->astats->bstats, + ctl_arena->astats->lstats, ctl_arena->astats->estats); + + for (i = 0; i < SC_NBINS; i++) { + ctl_arena->astats->allocated_small += + ctl_arena->astats->bstats[i].curregs * + sz_index2size(i); + ctl_arena->astats->nmalloc_small += + ctl_arena->astats->bstats[i].nmalloc; + ctl_arena->astats->ndalloc_small += + ctl_arena->astats->bstats[i].ndalloc; + ctl_arena->astats->nrequests_small += + ctl_arena->astats->bstats[i].nrequests; + ctl_arena->astats->nfills_small += + ctl_arena->astats->bstats[i].nfills; + ctl_arena->astats->nflushes_small += + ctl_arena->astats->bstats[i].nflushes; + } + } else { + arena_basic_stats_merge(tsdn, arena, &ctl_arena->nthreads, + &ctl_arena->dss, &ctl_arena->dirty_decay_ms, + &ctl_arena->muzzy_decay_ms, &ctl_arena->pactive, + &ctl_arena->pdirty, &ctl_arena->pmuzzy); + } +} + +static void +ctl_arena_stats_sdmerge(ctl_arena_t *ctl_sdarena, ctl_arena_t *ctl_arena, + bool destroyed) { + unsigned i; + + if (!destroyed) { + ctl_sdarena->nthreads += ctl_arena->nthreads; + ctl_sdarena->pactive += ctl_arena->pactive; + ctl_sdarena->pdirty += ctl_arena->pdirty; + ctl_sdarena->pmuzzy += ctl_arena->pmuzzy; + } else { + assert(ctl_arena->nthreads == 0); + assert(ctl_arena->pactive == 0); + assert(ctl_arena->pdirty == 0); + assert(ctl_arena->pmuzzy == 0); + } + + if (config_stats) { + ctl_arena_stats_t *sdstats = ctl_sdarena->astats; + ctl_arena_stats_t *astats = ctl_arena->astats; + + if (!destroyed) { + accum_atomic_zu(&sdstats->astats.mapped, + &astats->astats.mapped); + accum_atomic_zu(&sdstats->astats.retained, + &astats->astats.retained); + accum_atomic_zu(&sdstats->astats.extent_avail, + &astats->astats.extent_avail); + } + + ctl_accum_arena_stats_u64(&sdstats->astats.decay_dirty.npurge, + &astats->astats.decay_dirty.npurge); + ctl_accum_arena_stats_u64(&sdstats->astats.decay_dirty.nmadvise, + &astats->astats.decay_dirty.nmadvise); + ctl_accum_arena_stats_u64(&sdstats->astats.decay_dirty.purged, + &astats->astats.decay_dirty.purged); + + ctl_accum_arena_stats_u64(&sdstats->astats.decay_muzzy.npurge, + &astats->astats.decay_muzzy.npurge); + ctl_accum_arena_stats_u64(&sdstats->astats.decay_muzzy.nmadvise, + &astats->astats.decay_muzzy.nmadvise); + ctl_accum_arena_stats_u64(&sdstats->astats.decay_muzzy.purged, + &astats->astats.decay_muzzy.purged); + +#define OP(mtx) malloc_mutex_prof_merge( \ + &(sdstats->astats.mutex_prof_data[ \ + arena_prof_mutex_##mtx]), \ + &(astats->astats.mutex_prof_data[ \ + arena_prof_mutex_##mtx])); +MUTEX_PROF_ARENA_MUTEXES +#undef OP + if (!destroyed) { + accum_atomic_zu(&sdstats->astats.base, + &astats->astats.base); + accum_atomic_zu(&sdstats->astats.internal, + &astats->astats.internal); + accum_atomic_zu(&sdstats->astats.resident, + &astats->astats.resident); + accum_atomic_zu(&sdstats->astats.metadata_thp, + &astats->astats.metadata_thp); + } else { + assert(atomic_load_zu( + &astats->astats.internal, ATOMIC_RELAXED) == 0); + } + + if (!destroyed) { + sdstats->allocated_small += astats->allocated_small; + } else { + assert(astats->allocated_small == 0); + } + sdstats->nmalloc_small += astats->nmalloc_small; + sdstats->ndalloc_small += astats->ndalloc_small; + sdstats->nrequests_small += astats->nrequests_small; + sdstats->nfills_small += astats->nfills_small; + sdstats->nflushes_small += astats->nflushes_small; + + if (!destroyed) { + accum_atomic_zu(&sdstats->astats.allocated_large, + &astats->astats.allocated_large); + } else { + assert(atomic_load_zu(&astats->astats.allocated_large, + ATOMIC_RELAXED) == 0); + } + ctl_accum_arena_stats_u64(&sdstats->astats.nmalloc_large, + &astats->astats.nmalloc_large); + ctl_accum_arena_stats_u64(&sdstats->astats.ndalloc_large, + &astats->astats.ndalloc_large); + ctl_accum_arena_stats_u64(&sdstats->astats.nrequests_large, + &astats->astats.nrequests_large); + accum_atomic_zu(&sdstats->astats.abandoned_vm, + &astats->astats.abandoned_vm); + + accum_atomic_zu(&sdstats->astats.tcache_bytes, + &astats->astats.tcache_bytes); + + if (ctl_arena->arena_ind == 0) { + sdstats->astats.uptime = astats->astats.uptime; + } + + /* Merge bin stats. */ + for (i = 0; i < SC_NBINS; i++) { + sdstats->bstats[i].nmalloc += astats->bstats[i].nmalloc; + sdstats->bstats[i].ndalloc += astats->bstats[i].ndalloc; + sdstats->bstats[i].nrequests += + astats->bstats[i].nrequests; + if (!destroyed) { + sdstats->bstats[i].curregs += + astats->bstats[i].curregs; + } else { + assert(astats->bstats[i].curregs == 0); + } + sdstats->bstats[i].nfills += astats->bstats[i].nfills; + sdstats->bstats[i].nflushes += + astats->bstats[i].nflushes; + sdstats->bstats[i].nslabs += astats->bstats[i].nslabs; + sdstats->bstats[i].reslabs += astats->bstats[i].reslabs; + if (!destroyed) { + sdstats->bstats[i].curslabs += + astats->bstats[i].curslabs; + sdstats->bstats[i].nonfull_slabs += + astats->bstats[i].nonfull_slabs; + } else { + assert(astats->bstats[i].curslabs == 0); + assert(astats->bstats[i].nonfull_slabs == 0); + } + malloc_mutex_prof_merge(&sdstats->bstats[i].mutex_data, + &astats->bstats[i].mutex_data); + } + + /* Merge stats for large allocations. */ + for (i = 0; i < SC_NSIZES - SC_NBINS; i++) { + ctl_accum_arena_stats_u64(&sdstats->lstats[i].nmalloc, + &astats->lstats[i].nmalloc); + ctl_accum_arena_stats_u64(&sdstats->lstats[i].ndalloc, + &astats->lstats[i].ndalloc); + ctl_accum_arena_stats_u64(&sdstats->lstats[i].nrequests, + &astats->lstats[i].nrequests); + if (!destroyed) { + sdstats->lstats[i].curlextents += + astats->lstats[i].curlextents; + } else { + assert(astats->lstats[i].curlextents == 0); + } + } + + /* Merge extents stats. */ + for (i = 0; i < SC_NPSIZES; i++) { + accum_atomic_zu(&sdstats->estats[i].ndirty, + &astats->estats[i].ndirty); + accum_atomic_zu(&sdstats->estats[i].nmuzzy, + &astats->estats[i].nmuzzy); + accum_atomic_zu(&sdstats->estats[i].nretained, + &astats->estats[i].nretained); + accum_atomic_zu(&sdstats->estats[i].dirty_bytes, + &astats->estats[i].dirty_bytes); + accum_atomic_zu(&sdstats->estats[i].muzzy_bytes, + &astats->estats[i].muzzy_bytes); + accum_atomic_zu(&sdstats->estats[i].retained_bytes, + &astats->estats[i].retained_bytes); + } + } +} + +static void +ctl_arena_refresh(tsdn_t *tsdn, arena_t *arena, ctl_arena_t *ctl_sdarena, + unsigned i, bool destroyed) { + ctl_arena_t *ctl_arena = arenas_i(i); + + ctl_arena_clear(ctl_arena); + ctl_arena_stats_amerge(tsdn, ctl_arena, arena); + /* Merge into sum stats as well. */ + ctl_arena_stats_sdmerge(ctl_sdarena, ctl_arena, destroyed); +} + +static unsigned +ctl_arena_init(tsd_t *tsd, extent_hooks_t *extent_hooks) { + unsigned arena_ind; + ctl_arena_t *ctl_arena; + + if ((ctl_arena = ql_last(&ctl_arenas->destroyed, destroyed_link)) != + NULL) { + ql_remove(&ctl_arenas->destroyed, ctl_arena, destroyed_link); + arena_ind = ctl_arena->arena_ind; + } else { + arena_ind = ctl_arenas->narenas; + } + + /* Trigger stats allocation. */ + if (arenas_i_impl(tsd, arena_ind, false, true) == NULL) { + return UINT_MAX; + } + + /* Initialize new arena. */ + if (arena_init(tsd_tsdn(tsd), arena_ind, extent_hooks) == NULL) { + return UINT_MAX; + } + + if (arena_ind == ctl_arenas->narenas) { + ctl_arenas->narenas++; + } + + return arena_ind; +} + +static void +ctl_background_thread_stats_read(tsdn_t *tsdn) { + background_thread_stats_t *stats = &ctl_stats->background_thread; + if (!have_background_thread || + background_thread_stats_read(tsdn, stats)) { + memset(stats, 0, sizeof(background_thread_stats_t)); + nstime_init(&stats->run_interval, 0); + } +} + +static void +ctl_refresh(tsdn_t *tsdn) { + unsigned i; + ctl_arena_t *ctl_sarena = arenas_i(MALLCTL_ARENAS_ALL); + VARIABLE_ARRAY(arena_t *, tarenas, ctl_arenas->narenas); + + /* + * Clear sum stats, since they will be merged into by + * ctl_arena_refresh(). + */ + ctl_arena_clear(ctl_sarena); + + for (i = 0; i < ctl_arenas->narenas; i++) { + tarenas[i] = arena_get(tsdn, i, false); + } + + for (i = 0; i < ctl_arenas->narenas; i++) { + ctl_arena_t *ctl_arena = arenas_i(i); + bool initialized = (tarenas[i] != NULL); + + ctl_arena->initialized = initialized; + if (initialized) { + ctl_arena_refresh(tsdn, tarenas[i], ctl_sarena, i, + false); + } + } + + if (config_stats) { + ctl_stats->allocated = ctl_sarena->astats->allocated_small + + atomic_load_zu(&ctl_sarena->astats->astats.allocated_large, + ATOMIC_RELAXED); + ctl_stats->active = (ctl_sarena->pactive << LG_PAGE); + ctl_stats->metadata = atomic_load_zu( + &ctl_sarena->astats->astats.base, ATOMIC_RELAXED) + + atomic_load_zu(&ctl_sarena->astats->astats.internal, + ATOMIC_RELAXED); + ctl_stats->metadata_thp = atomic_load_zu( + &ctl_sarena->astats->astats.metadata_thp, ATOMIC_RELAXED); + ctl_stats->resident = atomic_load_zu( + &ctl_sarena->astats->astats.resident, ATOMIC_RELAXED); + ctl_stats->mapped = atomic_load_zu( + &ctl_sarena->astats->astats.mapped, ATOMIC_RELAXED); + ctl_stats->retained = atomic_load_zu( + &ctl_sarena->astats->astats.retained, ATOMIC_RELAXED); + + ctl_background_thread_stats_read(tsdn); + +#define READ_GLOBAL_MUTEX_PROF_DATA(i, mtx) \ + malloc_mutex_lock(tsdn, &mtx); \ + malloc_mutex_prof_read(tsdn, &ctl_stats->mutex_prof_data[i], &mtx); \ + malloc_mutex_unlock(tsdn, &mtx); + + if (config_prof && opt_prof) { + READ_GLOBAL_MUTEX_PROF_DATA(global_prof_mutex_prof, + bt2gctx_mtx); + } + if (have_background_thread) { + READ_GLOBAL_MUTEX_PROF_DATA( + global_prof_mutex_background_thread, + background_thread_lock); + } else { + memset(&ctl_stats->mutex_prof_data[ + global_prof_mutex_background_thread], 0, + sizeof(mutex_prof_data_t)); + } + /* We own ctl mutex already. */ + malloc_mutex_prof_read(tsdn, + &ctl_stats->mutex_prof_data[global_prof_mutex_ctl], + &ctl_mtx); +#undef READ_GLOBAL_MUTEX_PROF_DATA + } + ctl_arenas->epoch++; +} + +static bool +ctl_init(tsd_t *tsd) { + bool ret; + tsdn_t *tsdn = tsd_tsdn(tsd); + + malloc_mutex_lock(tsdn, &ctl_mtx); + if (!ctl_initialized) { + ctl_arena_t *ctl_sarena, *ctl_darena; + unsigned i; + + /* + * Allocate demand-zeroed space for pointers to the full + * range of supported arena indices. + */ + if (ctl_arenas == NULL) { + ctl_arenas = (ctl_arenas_t *)base_alloc(tsdn, + b0get(), sizeof(ctl_arenas_t), QUANTUM); + if (ctl_arenas == NULL) { + ret = true; + goto label_return; + } + } + + if (config_stats && ctl_stats == NULL) { + ctl_stats = (ctl_stats_t *)base_alloc(tsdn, b0get(), + sizeof(ctl_stats_t), QUANTUM); + if (ctl_stats == NULL) { + ret = true; + goto label_return; + } + } + + /* + * Allocate space for the current full range of arenas + * here rather than doing it lazily elsewhere, in order + * to limit when OOM-caused errors can occur. + */ + if ((ctl_sarena = arenas_i_impl(tsd, MALLCTL_ARENAS_ALL, false, + true)) == NULL) { + ret = true; + goto label_return; + } + ctl_sarena->initialized = true; + + if ((ctl_darena = arenas_i_impl(tsd, MALLCTL_ARENAS_DESTROYED, + false, true)) == NULL) { + ret = true; + goto label_return; + } + ctl_arena_clear(ctl_darena); + /* + * Don't toggle ctl_darena to initialized until an arena is + * actually destroyed, so that arena.<i>.initialized can be used + * to query whether the stats are relevant. + */ + + ctl_arenas->narenas = narenas_total_get(); + for (i = 0; i < ctl_arenas->narenas; i++) { + if (arenas_i_impl(tsd, i, false, true) == NULL) { + ret = true; + goto label_return; + } + } + + ql_new(&ctl_arenas->destroyed); + ctl_refresh(tsdn); + + ctl_initialized = true; + } + + ret = false; +label_return: + malloc_mutex_unlock(tsdn, &ctl_mtx); + return ret; +} + +static int +ctl_lookup(tsdn_t *tsdn, const char *name, ctl_node_t const **nodesp, + size_t *mibp, size_t *depthp) { + int ret; + const char *elm, *tdot, *dot; + size_t elen, i, j; + const ctl_named_node_t *node; + + elm = name; + /* Equivalent to strchrnul(). */ + dot = ((tdot = strchr(elm, '.')) != NULL) ? tdot : strchr(elm, '\0'); + elen = (size_t)((uintptr_t)dot - (uintptr_t)elm); + if (elen == 0) { + ret = ENOENT; + goto label_return; + } + node = super_root_node; + for (i = 0; i < *depthp; i++) { + assert(node); + assert(node->nchildren > 0); + if (ctl_named_node(node->children) != NULL) { + const ctl_named_node_t *pnode = node; + + /* Children are named. */ + for (j = 0; j < node->nchildren; j++) { + const ctl_named_node_t *child = + ctl_named_children(node, j); + if (strlen(child->name) == elen && + strncmp(elm, child->name, elen) == 0) { + node = child; + if (nodesp != NULL) { + nodesp[i] = + (const ctl_node_t *)node; + } + mibp[i] = j; + break; + } + } + if (node == pnode) { + ret = ENOENT; + goto label_return; + } + } else { + uintmax_t index; + const ctl_indexed_node_t *inode; + + /* Children are indexed. */ + index = malloc_strtoumax(elm, NULL, 10); + if (index == UINTMAX_MAX || index > SIZE_T_MAX) { + ret = ENOENT; + goto label_return; + } + + inode = ctl_indexed_node(node->children); + node = inode->index(tsdn, mibp, *depthp, (size_t)index); + if (node == NULL) { + ret = ENOENT; + goto label_return; + } + + if (nodesp != NULL) { + nodesp[i] = (const ctl_node_t *)node; + } + mibp[i] = (size_t)index; + } + + if (node->ctl != NULL) { + /* Terminal node. */ + if (*dot != '\0') { + /* + * The name contains more elements than are + * in this path through the tree. + */ + ret = ENOENT; + goto label_return; + } + /* Complete lookup successful. */ + *depthp = i + 1; + break; + } + + /* Update elm. */ + if (*dot == '\0') { + /* No more elements. */ + ret = ENOENT; + goto label_return; + } + elm = &dot[1]; + dot = ((tdot = strchr(elm, '.')) != NULL) ? tdot : + strchr(elm, '\0'); + elen = (size_t)((uintptr_t)dot - (uintptr_t)elm); + } + + ret = 0; +label_return: + return ret; +} + +int +ctl_byname(tsd_t *tsd, const char *name, void *oldp, size_t *oldlenp, + void *newp, size_t newlen) { + int ret; + size_t depth; + ctl_node_t const *nodes[CTL_MAX_DEPTH]; + size_t mib[CTL_MAX_DEPTH]; + const ctl_named_node_t *node; + + if (!ctl_initialized && ctl_init(tsd)) { + ret = EAGAIN; + goto label_return; + } + + depth = CTL_MAX_DEPTH; + ret = ctl_lookup(tsd_tsdn(tsd), name, nodes, mib, &depth); + if (ret != 0) { + goto label_return; + } + + node = ctl_named_node(nodes[depth-1]); + if (node != NULL && node->ctl) { + ret = node->ctl(tsd, mib, depth, oldp, oldlenp, newp, newlen); + } else { + /* The name refers to a partial path through the ctl tree. */ + ret = ENOENT; + } + +label_return: + return(ret); +} + +int +ctl_nametomib(tsd_t *tsd, const char *name, size_t *mibp, size_t *miblenp) { + int ret; + + if (!ctl_initialized && ctl_init(tsd)) { + ret = EAGAIN; + goto label_return; + } + + ret = ctl_lookup(tsd_tsdn(tsd), name, NULL, mibp, miblenp); +label_return: + return(ret); +} + +int +ctl_bymib(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + int ret; + const ctl_named_node_t *node; + size_t i; + + if (!ctl_initialized && ctl_init(tsd)) { + ret = EAGAIN; + goto label_return; + } + + /* Iterate down the tree. */ + node = super_root_node; + for (i = 0; i < miblen; i++) { + assert(node); + assert(node->nchildren > 0); + if (ctl_named_node(node->children) != NULL) { + /* Children are named. */ + if (node->nchildren <= mib[i]) { + ret = ENOENT; + goto label_return; + } + node = ctl_named_children(node, mib[i]); + } else { + const ctl_indexed_node_t *inode; + + /* Indexed element. */ + inode = ctl_indexed_node(node->children); + node = inode->index(tsd_tsdn(tsd), mib, miblen, mib[i]); + if (node == NULL) { + ret = ENOENT; + goto label_return; + } + } + } + + /* Call the ctl function. */ + if (node && node->ctl) { + ret = node->ctl(tsd, mib, miblen, oldp, oldlenp, newp, newlen); + } else { + /* Partial MIB. */ + ret = ENOENT; + } + +label_return: + return(ret); +} + +bool +ctl_boot(void) { + if (malloc_mutex_init(&ctl_mtx, "ctl", WITNESS_RANK_CTL, + malloc_mutex_rank_exclusive)) { + return true; + } + + ctl_initialized = false; + + return false; +} + +void +ctl_prefork(tsdn_t *tsdn) { + malloc_mutex_prefork(tsdn, &ctl_mtx); +} + +void +ctl_postfork_parent(tsdn_t *tsdn) { + malloc_mutex_postfork_parent(tsdn, &ctl_mtx); +} + +void +ctl_postfork_child(tsdn_t *tsdn) { + malloc_mutex_postfork_child(tsdn, &ctl_mtx); +} + +/******************************************************************************/ +/* *_ctl() functions. */ + +#define READONLY() do { \ + if (newp != NULL || newlen != 0) { \ + ret = EPERM; \ + goto label_return; \ + } \ +} while (0) + +#define WRITEONLY() do { \ + if (oldp != NULL || oldlenp != NULL) { \ + ret = EPERM; \ + goto label_return; \ + } \ +} while (0) + +#define READ_XOR_WRITE() do { \ + if ((oldp != NULL && oldlenp != NULL) && (newp != NULL || \ + newlen != 0)) { \ + ret = EPERM; \ + goto label_return; \ + } \ +} while (0) + +#define READ(v, t) do { \ + if (oldp != NULL && oldlenp != NULL) { \ + if (*oldlenp != sizeof(t)) { \ + size_t copylen = (sizeof(t) <= *oldlenp) \ + ? sizeof(t) : *oldlenp; \ + memcpy(oldp, (void *)&(v), copylen); \ + ret = EINVAL; \ + goto label_return; \ + } \ + *(t *)oldp = (v); \ + } \ +} while (0) + +#define WRITE(v, t) do { \ + if (newp != NULL) { \ + if (newlen != sizeof(t)) { \ + ret = EINVAL; \ + goto label_return; \ + } \ + (v) = *(t *)newp; \ + } \ +} while (0) + +#define MIB_UNSIGNED(v, i) do { \ + if (mib[i] > UINT_MAX) { \ + ret = EFAULT; \ + goto label_return; \ + } \ + v = (unsigned)mib[i]; \ +} while (0) + +/* + * There's a lot of code duplication in the following macros due to limitations + * in how nested cpp macros are expanded. + */ +#define CTL_RO_CLGEN(c, l, n, v, t) \ +static int \ +n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, \ + size_t *oldlenp, void *newp, size_t newlen) { \ + int ret; \ + t oldval; \ + \ + if (!(c)) { \ + return ENOENT; \ + } \ + if (l) { \ + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); \ + } \ + READONLY(); \ + oldval = (v); \ + READ(oldval, t); \ + \ + ret = 0; \ +label_return: \ + if (l) { \ + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); \ + } \ + return ret; \ +} + +#define CTL_RO_CGEN(c, n, v, t) \ +static int \ +n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, \ + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { \ + int ret; \ + t oldval; \ + \ + if (!(c)) { \ + return ENOENT; \ + } \ + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); \ + READONLY(); \ + oldval = (v); \ + READ(oldval, t); \ + \ + ret = 0; \ +label_return: \ + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); \ + return ret; \ +} + +#define CTL_RO_GEN(n, v, t) \ +static int \ +n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, \ + size_t *oldlenp, void *newp, size_t newlen) { \ + int ret; \ + t oldval; \ + \ + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); \ + READONLY(); \ + oldval = (v); \ + READ(oldval, t); \ + \ + ret = 0; \ +label_return: \ + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); \ + return ret; \ +} + +/* + * ctl_mtx is not acquired, under the assumption that no pertinent data will + * mutate during the call. + */ +#define CTL_RO_NL_CGEN(c, n, v, t) \ +static int \ +n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, \ + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { \ + int ret; \ + t oldval; \ + \ + if (!(c)) { \ + return ENOENT; \ + } \ + READONLY(); \ + oldval = (v); \ + READ(oldval, t); \ + \ + ret = 0; \ +label_return: \ + return ret; \ +} + +#define CTL_RO_NL_GEN(n, v, t) \ +static int \ +n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, \ + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { \ + int ret; \ + t oldval; \ + \ + READONLY(); \ + oldval = (v); \ + READ(oldval, t); \ + \ + ret = 0; \ +label_return: \ + return ret; \ +} + +#define CTL_TSD_RO_NL_CGEN(c, n, m, t) \ +static int \ +n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, \ + size_t *oldlenp, void *newp, size_t newlen) { \ + int ret; \ + t oldval; \ + \ + if (!(c)) { \ + return ENOENT; \ + } \ + READONLY(); \ + oldval = (m(tsd)); \ + READ(oldval, t); \ + \ + ret = 0; \ +label_return: \ + return ret; \ +} + +#define CTL_RO_CONFIG_GEN(n, t) \ +static int \ +n##_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, \ + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { \ + int ret; \ + t oldval; \ + \ + READONLY(); \ + oldval = n; \ + READ(oldval, t); \ + \ + ret = 0; \ +label_return: \ + return ret; \ +} + +/******************************************************************************/ + +CTL_RO_NL_GEN(version, JEMALLOC_VERSION, const char *) + +static int +epoch_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + UNUSED uint64_t newval; + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + WRITE(newval, uint64_t); + if (newp != NULL) { + ctl_refresh(tsd_tsdn(tsd)); + } + READ(ctl_arenas->epoch, uint64_t); + + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} + +static int +background_thread_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, + void *newp, size_t newlen) { + int ret; + bool oldval; + + if (!have_background_thread) { + return ENOENT; + } + background_thread_ctl_init(tsd_tsdn(tsd)); + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + malloc_mutex_lock(tsd_tsdn(tsd), &background_thread_lock); + if (newp == NULL) { + oldval = background_thread_enabled(); + READ(oldval, bool); + } else { + if (newlen != sizeof(bool)) { + ret = EINVAL; + goto label_return; + } + oldval = background_thread_enabled(); + READ(oldval, bool); + + bool newval = *(bool *)newp; + if (newval == oldval) { + ret = 0; + goto label_return; + } + + background_thread_enabled_set(tsd_tsdn(tsd), newval); + if (newval) { + if (background_threads_enable(tsd)) { + ret = EFAULT; + goto label_return; + } + } else { + if (background_threads_disable(tsd)) { + ret = EFAULT; + goto label_return; + } + } + } + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock); + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + + return ret; +} + +static int +max_background_threads_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + size_t oldval; + + if (!have_background_thread) { + return ENOENT; + } + background_thread_ctl_init(tsd_tsdn(tsd)); + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + malloc_mutex_lock(tsd_tsdn(tsd), &background_thread_lock); + if (newp == NULL) { + oldval = max_background_threads; + READ(oldval, size_t); + } else { + if (newlen != sizeof(size_t)) { + ret = EINVAL; + goto label_return; + } + oldval = max_background_threads; + READ(oldval, size_t); + + size_t newval = *(size_t *)newp; + if (newval == oldval) { + ret = 0; + goto label_return; + } + if (newval > opt_max_background_threads) { + ret = EINVAL; + goto label_return; + } + + if (background_thread_enabled()) { + background_thread_enabled_set(tsd_tsdn(tsd), false); + if (background_threads_disable(tsd)) { + ret = EFAULT; + goto label_return; + } + max_background_threads = newval; + background_thread_enabled_set(tsd_tsdn(tsd), true); + if (background_threads_enable(tsd)) { + ret = EFAULT; + goto label_return; + } + } else { + max_background_threads = newval; + } + } + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock); + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + + return ret; +} + +/******************************************************************************/ + +CTL_RO_CONFIG_GEN(config_cache_oblivious, bool) +CTL_RO_CONFIG_GEN(config_debug, bool) +CTL_RO_CONFIG_GEN(config_fill, bool) +CTL_RO_CONFIG_GEN(config_lazy_lock, bool) +CTL_RO_CONFIG_GEN(config_malloc_conf, const char *) +CTL_RO_CONFIG_GEN(config_opt_safety_checks, bool) +CTL_RO_CONFIG_GEN(config_prof, bool) +CTL_RO_CONFIG_GEN(config_prof_libgcc, bool) +CTL_RO_CONFIG_GEN(config_prof_libunwind, bool) +CTL_RO_CONFIG_GEN(config_stats, bool) +CTL_RO_CONFIG_GEN(config_utrace, bool) +CTL_RO_CONFIG_GEN(config_xmalloc, bool) + +/******************************************************************************/ + +CTL_RO_NL_GEN(opt_abort, opt_abort, bool) +CTL_RO_NL_GEN(opt_abort_conf, opt_abort_conf, bool) +CTL_RO_NL_GEN(opt_confirm_conf, opt_confirm_conf, bool) +CTL_RO_NL_GEN(opt_metadata_thp, metadata_thp_mode_names[opt_metadata_thp], + const char *) +CTL_RO_NL_GEN(opt_retain, opt_retain, bool) +CTL_RO_NL_GEN(opt_dss, opt_dss, const char *) +CTL_RO_NL_GEN(opt_narenas, opt_narenas, unsigned) +CTL_RO_NL_GEN(opt_percpu_arena, percpu_arena_mode_names[opt_percpu_arena], + const char *) +CTL_RO_NL_GEN(opt_oversize_threshold, opt_oversize_threshold, size_t) +CTL_RO_NL_GEN(opt_background_thread, opt_background_thread, bool) +CTL_RO_NL_GEN(opt_max_background_threads, opt_max_background_threads, size_t) +CTL_RO_NL_GEN(opt_dirty_decay_ms, opt_dirty_decay_ms, ssize_t) +CTL_RO_NL_GEN(opt_muzzy_decay_ms, opt_muzzy_decay_ms, ssize_t) +CTL_RO_NL_GEN(opt_stats_print, opt_stats_print, bool) +CTL_RO_NL_GEN(opt_stats_print_opts, opt_stats_print_opts, const char *) +CTL_RO_NL_CGEN(config_fill, opt_junk, opt_junk, const char *) +CTL_RO_NL_CGEN(config_fill, opt_zero, opt_zero, bool) +CTL_RO_NL_CGEN(config_utrace, opt_utrace, opt_utrace, bool) +CTL_RO_NL_CGEN(config_xmalloc, opt_xmalloc, opt_xmalloc, bool) +CTL_RO_NL_GEN(opt_tcache, opt_tcache, bool) +CTL_RO_NL_GEN(opt_thp, thp_mode_names[opt_thp], const char *) +CTL_RO_NL_GEN(opt_lg_extent_max_active_fit, opt_lg_extent_max_active_fit, + size_t) +CTL_RO_NL_GEN(opt_lg_tcache_max, opt_lg_tcache_max, ssize_t) +CTL_RO_NL_CGEN(config_prof, opt_prof, opt_prof, bool) +CTL_RO_NL_CGEN(config_prof, opt_prof_prefix, opt_prof_prefix, const char *) +CTL_RO_NL_CGEN(config_prof, opt_prof_active, opt_prof_active, bool) +CTL_RO_NL_CGEN(config_prof, opt_prof_thread_active_init, + opt_prof_thread_active_init, bool) +CTL_RO_NL_CGEN(config_prof, opt_lg_prof_sample, opt_lg_prof_sample, size_t) +CTL_RO_NL_CGEN(config_prof, opt_prof_accum, opt_prof_accum, bool) +CTL_RO_NL_CGEN(config_prof, opt_lg_prof_interval, opt_lg_prof_interval, ssize_t) +CTL_RO_NL_CGEN(config_prof, opt_prof_gdump, opt_prof_gdump, bool) +CTL_RO_NL_CGEN(config_prof, opt_prof_final, opt_prof_final, bool) +CTL_RO_NL_CGEN(config_prof, opt_prof_leak, opt_prof_leak, bool) + +/******************************************************************************/ + +static int +thread_arena_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + arena_t *oldarena; + unsigned newind, oldind; + + oldarena = arena_choose(tsd, NULL); + if (oldarena == NULL) { + return EAGAIN; + } + newind = oldind = arena_ind_get(oldarena); + WRITE(newind, unsigned); + READ(oldind, unsigned); + + if (newind != oldind) { + arena_t *newarena; + + if (newind >= narenas_total_get()) { + /* New arena index is out of range. */ + ret = EFAULT; + goto label_return; + } + + if (have_percpu_arena && + PERCPU_ARENA_ENABLED(opt_percpu_arena)) { + if (newind < percpu_arena_ind_limit(opt_percpu_arena)) { + /* + * If perCPU arena is enabled, thread_arena + * control is not allowed for the auto arena + * range. + */ + ret = EPERM; + goto label_return; + } + } + + /* Initialize arena if necessary. */ + newarena = arena_get(tsd_tsdn(tsd), newind, true); + if (newarena == NULL) { + ret = EAGAIN; + goto label_return; + } + /* Set new arena/tcache associations. */ + arena_migrate(tsd, oldind, newind); + if (tcache_available(tsd)) { + tcache_arena_reassociate(tsd_tsdn(tsd), + tsd_tcachep_get(tsd), newarena); + } + } + + ret = 0; +label_return: + return ret; +} + +CTL_TSD_RO_NL_CGEN(config_stats, thread_allocated, tsd_thread_allocated_get, + uint64_t) +CTL_TSD_RO_NL_CGEN(config_stats, thread_allocatedp, tsd_thread_allocatedp_get, + uint64_t *) +CTL_TSD_RO_NL_CGEN(config_stats, thread_deallocated, tsd_thread_deallocated_get, + uint64_t) +CTL_TSD_RO_NL_CGEN(config_stats, thread_deallocatedp, + tsd_thread_deallocatedp_get, uint64_t *) + +static int +thread_tcache_enabled_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + bool oldval; + + oldval = tcache_enabled_get(tsd); + if (newp != NULL) { + if (newlen != sizeof(bool)) { + ret = EINVAL; + goto label_return; + } + tcache_enabled_set(tsd, *(bool *)newp); + } + READ(oldval, bool); + + ret = 0; +label_return: + return ret; +} + +static int +thread_tcache_flush_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + + if (!tcache_available(tsd)) { + ret = EFAULT; + goto label_return; + } + + READONLY(); + WRITEONLY(); + + tcache_flush(tsd); + + ret = 0; +label_return: + return ret; +} + +static int +thread_prof_name_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + + if (!config_prof) { + return ENOENT; + } + + READ_XOR_WRITE(); + + if (newp != NULL) { + if (newlen != sizeof(const char *)) { + ret = EINVAL; + goto label_return; + } + + if ((ret = prof_thread_name_set(tsd, *(const char **)newp)) != + 0) { + goto label_return; + } + } else { + const char *oldname = prof_thread_name_get(tsd); + READ(oldname, const char *); + } + + ret = 0; +label_return: + return ret; +} + +static int +thread_prof_active_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + bool oldval; + + if (!config_prof) { + return ENOENT; + } + + oldval = prof_thread_active_get(tsd); + if (newp != NULL) { + if (newlen != sizeof(bool)) { + ret = EINVAL; + goto label_return; + } + if (prof_thread_active_set(tsd, *(bool *)newp)) { + ret = EAGAIN; + goto label_return; + } + } + READ(oldval, bool); + + ret = 0; +label_return: + return ret; +} + +/******************************************************************************/ + +static int +tcache_create_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned tcache_ind; + + READONLY(); + if (tcaches_create(tsd, &tcache_ind)) { + ret = EFAULT; + goto label_return; + } + READ(tcache_ind, unsigned); + + ret = 0; +label_return: + return ret; +} + +static int +tcache_flush_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned tcache_ind; + + WRITEONLY(); + tcache_ind = UINT_MAX; + WRITE(tcache_ind, unsigned); + if (tcache_ind == UINT_MAX) { + ret = EFAULT; + goto label_return; + } + tcaches_flush(tsd, tcache_ind); + + ret = 0; +label_return: + return ret; +} + +static int +tcache_destroy_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned tcache_ind; + + WRITEONLY(); + tcache_ind = UINT_MAX; + WRITE(tcache_ind, unsigned); + if (tcache_ind == UINT_MAX) { + ret = EFAULT; + goto label_return; + } + tcaches_destroy(tsd, tcache_ind); + + ret = 0; +label_return: + return ret; +} + +/******************************************************************************/ + +static int +arena_i_initialized_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + tsdn_t *tsdn = tsd_tsdn(tsd); + unsigned arena_ind; + bool initialized; + + READONLY(); + MIB_UNSIGNED(arena_ind, 1); + + malloc_mutex_lock(tsdn, &ctl_mtx); + initialized = arenas_i(arena_ind)->initialized; + malloc_mutex_unlock(tsdn, &ctl_mtx); + + READ(initialized, bool); + + ret = 0; +label_return: + return ret; +} + +static void +arena_i_decay(tsdn_t *tsdn, unsigned arena_ind, bool all) { + malloc_mutex_lock(tsdn, &ctl_mtx); + { + unsigned narenas = ctl_arenas->narenas; + + /* + * Access via index narenas is deprecated, and scheduled for + * removal in 6.0.0. + */ + if (arena_ind == MALLCTL_ARENAS_ALL || arena_ind == narenas) { + unsigned i; + VARIABLE_ARRAY(arena_t *, tarenas, narenas); + + for (i = 0; i < narenas; i++) { + tarenas[i] = arena_get(tsdn, i, false); + } + + /* + * No further need to hold ctl_mtx, since narenas and + * tarenas contain everything needed below. + */ + malloc_mutex_unlock(tsdn, &ctl_mtx); + + for (i = 0; i < narenas; i++) { + if (tarenas[i] != NULL) { + arena_decay(tsdn, tarenas[i], false, + all); + } + } + } else { + arena_t *tarena; + + assert(arena_ind < narenas); + + tarena = arena_get(tsdn, arena_ind, false); + + /* No further need to hold ctl_mtx. */ + malloc_mutex_unlock(tsdn, &ctl_mtx); + + if (tarena != NULL) { + arena_decay(tsdn, tarena, false, all); + } + } + } +} + +static int +arena_i_decay_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned arena_ind; + + READONLY(); + WRITEONLY(); + MIB_UNSIGNED(arena_ind, 1); + arena_i_decay(tsd_tsdn(tsd), arena_ind, false); + + ret = 0; +label_return: + return ret; +} + +static int +arena_i_purge_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned arena_ind; + + READONLY(); + WRITEONLY(); + MIB_UNSIGNED(arena_ind, 1); + arena_i_decay(tsd_tsdn(tsd), arena_ind, true); + + ret = 0; +label_return: + return ret; +} + +static int +arena_i_reset_destroy_helper(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen, unsigned *arena_ind, + arena_t **arena) { + int ret; + + READONLY(); + WRITEONLY(); + MIB_UNSIGNED(*arena_ind, 1); + + *arena = arena_get(tsd_tsdn(tsd), *arena_ind, false); + if (*arena == NULL || arena_is_auto(*arena)) { + ret = EFAULT; + goto label_return; + } + + ret = 0; +label_return: + return ret; +} + +static void +arena_reset_prepare_background_thread(tsd_t *tsd, unsigned arena_ind) { + /* Temporarily disable the background thread during arena reset. */ + if (have_background_thread) { + malloc_mutex_lock(tsd_tsdn(tsd), &background_thread_lock); + if (background_thread_enabled()) { + background_thread_info_t *info = + background_thread_info_get(arena_ind); + assert(info->state == background_thread_started); + malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx); + info->state = background_thread_paused; + malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx); + } + } +} + +static void +arena_reset_finish_background_thread(tsd_t *tsd, unsigned arena_ind) { + if (have_background_thread) { + if (background_thread_enabled()) { + background_thread_info_t *info = + background_thread_info_get(arena_ind); + assert(info->state == background_thread_paused); + malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx); + info->state = background_thread_started; + malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx); + } + malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock); + } +} + +static int +arena_i_reset_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned arena_ind; + arena_t *arena; + + ret = arena_i_reset_destroy_helper(tsd, mib, miblen, oldp, oldlenp, + newp, newlen, &arena_ind, &arena); + if (ret != 0) { + return ret; + } + + arena_reset_prepare_background_thread(tsd, arena_ind); + arena_reset(tsd, arena); + arena_reset_finish_background_thread(tsd, arena_ind); + + return ret; +} + +static int +arena_i_destroy_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned arena_ind; + arena_t *arena; + ctl_arena_t *ctl_darena, *ctl_arena; + + ret = arena_i_reset_destroy_helper(tsd, mib, miblen, oldp, oldlenp, + newp, newlen, &arena_ind, &arena); + if (ret != 0) { + goto label_return; + } + + if (arena_nthreads_get(arena, false) != 0 || arena_nthreads_get(arena, + true) != 0) { + ret = EFAULT; + goto label_return; + } + + arena_reset_prepare_background_thread(tsd, arena_ind); + /* Merge stats after resetting and purging arena. */ + arena_reset(tsd, arena); + arena_decay(tsd_tsdn(tsd), arena, false, true); + ctl_darena = arenas_i(MALLCTL_ARENAS_DESTROYED); + ctl_darena->initialized = true; + ctl_arena_refresh(tsd_tsdn(tsd), arena, ctl_darena, arena_ind, true); + /* Destroy arena. */ + arena_destroy(tsd, arena); + ctl_arena = arenas_i(arena_ind); + ctl_arena->initialized = false; + /* Record arena index for later recycling via arenas.create. */ + ql_elm_new(ctl_arena, destroyed_link); + ql_tail_insert(&ctl_arenas->destroyed, ctl_arena, destroyed_link); + arena_reset_finish_background_thread(tsd, arena_ind); + + assert(ret == 0); +label_return: + return ret; +} + +static int +arena_i_dss_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + int ret; + const char *dss = NULL; + unsigned arena_ind; + dss_prec_t dss_prec_old = dss_prec_limit; + dss_prec_t dss_prec = dss_prec_limit; + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + WRITE(dss, const char *); + MIB_UNSIGNED(arena_ind, 1); + if (dss != NULL) { + int i; + bool match = false; + + for (i = 0; i < dss_prec_limit; i++) { + if (strcmp(dss_prec_names[i], dss) == 0) { + dss_prec = i; + match = true; + break; + } + } + + if (!match) { + ret = EINVAL; + goto label_return; + } + } + + /* + * Access via index narenas is deprecated, and scheduled for removal in + * 6.0.0. + */ + if (arena_ind == MALLCTL_ARENAS_ALL || arena_ind == + ctl_arenas->narenas) { + if (dss_prec != dss_prec_limit && + extent_dss_prec_set(dss_prec)) { + ret = EFAULT; + goto label_return; + } + dss_prec_old = extent_dss_prec_get(); + } else { + arena_t *arena = arena_get(tsd_tsdn(tsd), arena_ind, false); + if (arena == NULL || (dss_prec != dss_prec_limit && + arena_dss_prec_set(arena, dss_prec))) { + ret = EFAULT; + goto label_return; + } + dss_prec_old = arena_dss_prec_get(arena); + } + + dss = dss_prec_names[dss_prec_old]; + READ(dss, const char *); + + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} + +static int +arena_i_decay_ms_ctl_impl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen, bool dirty) { + int ret; + unsigned arena_ind; + arena_t *arena; + + MIB_UNSIGNED(arena_ind, 1); + arena = arena_get(tsd_tsdn(tsd), arena_ind, false); + if (arena == NULL) { + ret = EFAULT; + goto label_return; + } + + if (oldp != NULL && oldlenp != NULL) { + size_t oldval = dirty ? arena_dirty_decay_ms_get(arena) : + arena_muzzy_decay_ms_get(arena); + READ(oldval, ssize_t); + } + if (newp != NULL) { + if (newlen != sizeof(ssize_t)) { + ret = EINVAL; + goto label_return; + } + if (arena_is_huge(arena_ind) && *(ssize_t *)newp > 0) { + /* + * By default the huge arena purges eagerly. If it is + * set to non-zero decay time afterwards, background + * thread might be needed. + */ + if (background_thread_create(tsd, arena_ind)) { + ret = EFAULT; + goto label_return; + } + } + if (dirty ? arena_dirty_decay_ms_set(tsd_tsdn(tsd), arena, + *(ssize_t *)newp) : arena_muzzy_decay_ms_set(tsd_tsdn(tsd), + arena, *(ssize_t *)newp)) { + ret = EFAULT; + goto label_return; + } + } + + ret = 0; +label_return: + return ret; +} + +static int +arena_i_dirty_decay_ms_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + return arena_i_decay_ms_ctl_impl(tsd, mib, miblen, oldp, oldlenp, newp, + newlen, true); +} + +static int +arena_i_muzzy_decay_ms_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + return arena_i_decay_ms_ctl_impl(tsd, mib, miblen, oldp, oldlenp, newp, + newlen, false); +} + +static int +arena_i_extent_hooks_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned arena_ind; + arena_t *arena; + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + MIB_UNSIGNED(arena_ind, 1); + if (arena_ind < narenas_total_get()) { + extent_hooks_t *old_extent_hooks; + arena = arena_get(tsd_tsdn(tsd), arena_ind, false); + if (arena == NULL) { + if (arena_ind >= narenas_auto) { + ret = EFAULT; + goto label_return; + } + old_extent_hooks = + (extent_hooks_t *)&extent_hooks_default; + READ(old_extent_hooks, extent_hooks_t *); + if (newp != NULL) { + /* Initialize a new arena as a side effect. */ + extent_hooks_t *new_extent_hooks + JEMALLOC_CC_SILENCE_INIT(NULL); + WRITE(new_extent_hooks, extent_hooks_t *); + arena = arena_init(tsd_tsdn(tsd), arena_ind, + new_extent_hooks); + if (arena == NULL) { + ret = EFAULT; + goto label_return; + } + } + } else { + if (newp != NULL) { + extent_hooks_t *new_extent_hooks + JEMALLOC_CC_SILENCE_INIT(NULL); + WRITE(new_extent_hooks, extent_hooks_t *); + old_extent_hooks = extent_hooks_set(tsd, arena, + new_extent_hooks); + READ(old_extent_hooks, extent_hooks_t *); + } else { + old_extent_hooks = extent_hooks_get(arena); + READ(old_extent_hooks, extent_hooks_t *); + } + } + } else { + ret = EFAULT; + goto label_return; + } + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} + +static int +arena_i_retain_grow_limit_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + unsigned arena_ind; + arena_t *arena; + + if (!opt_retain) { + /* Only relevant when retain is enabled. */ + return ENOENT; + } + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + MIB_UNSIGNED(arena_ind, 1); + if (arena_ind < narenas_total_get() && (arena = + arena_get(tsd_tsdn(tsd), arena_ind, false)) != NULL) { + size_t old_limit, new_limit; + if (newp != NULL) { + WRITE(new_limit, size_t); + } + bool err = arena_retain_grow_limit_get_set(tsd, arena, + &old_limit, newp != NULL ? &new_limit : NULL); + if (!err) { + READ(old_limit, size_t); + ret = 0; + } else { + ret = EFAULT; + } + } else { + ret = EFAULT; + } +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} + +static const ctl_named_node_t * +arena_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen, + size_t i) { + const ctl_named_node_t *ret; + + malloc_mutex_lock(tsdn, &ctl_mtx); + switch (i) { + case MALLCTL_ARENAS_ALL: + case MALLCTL_ARENAS_DESTROYED: + break; + default: + if (i > ctl_arenas->narenas) { + ret = NULL; + goto label_return; + } + break; + } + + ret = super_arena_i_node; +label_return: + malloc_mutex_unlock(tsdn, &ctl_mtx); + return ret; +} + +/******************************************************************************/ + +static int +arenas_narenas_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + unsigned narenas; + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + READONLY(); + if (*oldlenp != sizeof(unsigned)) { + ret = EINVAL; + goto label_return; + } + narenas = ctl_arenas->narenas; + READ(narenas, unsigned); + + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} + +static int +arenas_decay_ms_ctl_impl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen, bool dirty) { + int ret; + + if (oldp != NULL && oldlenp != NULL) { + size_t oldval = (dirty ? arena_dirty_decay_ms_default_get() : + arena_muzzy_decay_ms_default_get()); + READ(oldval, ssize_t); + } + if (newp != NULL) { + if (newlen != sizeof(ssize_t)) { + ret = EINVAL; + goto label_return; + } + if (dirty ? arena_dirty_decay_ms_default_set(*(ssize_t *)newp) + : arena_muzzy_decay_ms_default_set(*(ssize_t *)newp)) { + ret = EFAULT; + goto label_return; + } + } + + ret = 0; +label_return: + return ret; +} + +static int +arenas_dirty_decay_ms_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + return arenas_decay_ms_ctl_impl(tsd, mib, miblen, oldp, oldlenp, newp, + newlen, true); +} + +static int +arenas_muzzy_decay_ms_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + return arenas_decay_ms_ctl_impl(tsd, mib, miblen, oldp, oldlenp, newp, + newlen, false); +} + +CTL_RO_NL_GEN(arenas_quantum, QUANTUM, size_t) +CTL_RO_NL_GEN(arenas_page, PAGE, size_t) +CTL_RO_NL_GEN(arenas_tcache_max, tcache_maxclass, size_t) +CTL_RO_NL_GEN(arenas_nbins, SC_NBINS, unsigned) +CTL_RO_NL_GEN(arenas_nhbins, nhbins, unsigned) +CTL_RO_NL_GEN(arenas_bin_i_size, bin_infos[mib[2]].reg_size, size_t) +CTL_RO_NL_GEN(arenas_bin_i_nregs, bin_infos[mib[2]].nregs, uint32_t) +CTL_RO_NL_GEN(arenas_bin_i_slab_size, bin_infos[mib[2]].slab_size, size_t) +CTL_RO_NL_GEN(arenas_bin_i_nshards, bin_infos[mib[2]].n_shards, uint32_t) +static const ctl_named_node_t * +arenas_bin_i_index(tsdn_t *tsdn, const size_t *mib, + size_t miblen, size_t i) { + if (i > SC_NBINS) { + return NULL; + } + return super_arenas_bin_i_node; +} + +CTL_RO_NL_GEN(arenas_nlextents, SC_NSIZES - SC_NBINS, unsigned) +CTL_RO_NL_GEN(arenas_lextent_i_size, sz_index2size(SC_NBINS+(szind_t)mib[2]), + size_t) +static const ctl_named_node_t * +arenas_lextent_i_index(tsdn_t *tsdn, const size_t *mib, + size_t miblen, size_t i) { + if (i > SC_NSIZES - SC_NBINS) { + return NULL; + } + return super_arenas_lextent_i_node; +} + +static int +arenas_create_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + extent_hooks_t *extent_hooks; + unsigned arena_ind; + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + + extent_hooks = (extent_hooks_t *)&extent_hooks_default; + WRITE(extent_hooks, extent_hooks_t *); + if ((arena_ind = ctl_arena_init(tsd, extent_hooks)) == UINT_MAX) { + ret = EAGAIN; + goto label_return; + } + READ(arena_ind, unsigned); + + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} + +static int +arenas_lookup_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + unsigned arena_ind; + void *ptr; + extent_t *extent; + arena_t *arena; + + ptr = NULL; + ret = EINVAL; + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + WRITE(ptr, void *); + extent = iealloc(tsd_tsdn(tsd), ptr); + if (extent == NULL) + goto label_return; + + arena = extent_arena_get(extent); + if (arena == NULL) + goto label_return; + + arena_ind = arena_ind_get(arena); + READ(arena_ind, unsigned); + + ret = 0; +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} + +/******************************************************************************/ + +static int +prof_thread_active_init_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) { + int ret; + bool oldval; + + if (!config_prof) { + return ENOENT; + } + + if (newp != NULL) { + if (newlen != sizeof(bool)) { + ret = EINVAL; + goto label_return; + } + oldval = prof_thread_active_init_set(tsd_tsdn(tsd), + *(bool *)newp); + } else { + oldval = prof_thread_active_init_get(tsd_tsdn(tsd)); + } + READ(oldval, bool); + + ret = 0; +label_return: + return ret; +} + +static int +prof_active_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + bool oldval; + + if (!config_prof) { + return ENOENT; + } + + if (newp != NULL) { + if (newlen != sizeof(bool)) { + ret = EINVAL; + goto label_return; + } + oldval = prof_active_set(tsd_tsdn(tsd), *(bool *)newp); + } else { + oldval = prof_active_get(tsd_tsdn(tsd)); + } + READ(oldval, bool); + + ret = 0; +label_return: + return ret; +} + +static int +prof_dump_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + const char *filename = NULL; + + if (!config_prof) { + return ENOENT; + } + + WRITEONLY(); + WRITE(filename, const char *); + + if (prof_mdump(tsd, filename)) { + ret = EFAULT; + goto label_return; + } + + ret = 0; +label_return: + return ret; +} + +static int +prof_gdump_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + bool oldval; + + if (!config_prof) { + return ENOENT; + } + + if (newp != NULL) { + if (newlen != sizeof(bool)) { + ret = EINVAL; + goto label_return; + } + oldval = prof_gdump_set(tsd_tsdn(tsd), *(bool *)newp); + } else { + oldval = prof_gdump_get(tsd_tsdn(tsd)); + } + READ(oldval, bool); + + ret = 0; +label_return: + return ret; +} + +static int +prof_reset_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + size_t lg_sample = lg_prof_sample; + + if (!config_prof) { + return ENOENT; + } + + WRITEONLY(); + WRITE(lg_sample, size_t); + if (lg_sample >= (sizeof(uint64_t) << 3)) { + lg_sample = (sizeof(uint64_t) << 3) - 1; + } + + prof_reset(tsd, lg_sample); + + ret = 0; +label_return: + return ret; +} + +CTL_RO_NL_CGEN(config_prof, prof_interval, prof_interval, uint64_t) +CTL_RO_NL_CGEN(config_prof, lg_prof_sample, lg_prof_sample, size_t) + +static int +prof_log_start_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + int ret; + + const char *filename = NULL; + + if (!config_prof) { + return ENOENT; + } + + WRITEONLY(); + WRITE(filename, const char *); + + if (prof_log_start(tsd_tsdn(tsd), filename)) { + ret = EFAULT; + goto label_return; + } + + ret = 0; +label_return: + return ret; +} + +static int +prof_log_stop_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp, + size_t *oldlenp, void *newp, size_t newlen) { + if (!config_prof) { + return ENOENT; + } + + if (prof_log_stop(tsd_tsdn(tsd))) { + return EFAULT; + } + + return 0; +} + +/******************************************************************************/ + +CTL_RO_CGEN(config_stats, stats_allocated, ctl_stats->allocated, size_t) +CTL_RO_CGEN(config_stats, stats_active, ctl_stats->active, size_t) +CTL_RO_CGEN(config_stats, stats_metadata, ctl_stats->metadata, size_t) +CTL_RO_CGEN(config_stats, stats_metadata_thp, ctl_stats->metadata_thp, size_t) +CTL_RO_CGEN(config_stats, stats_resident, ctl_stats->resident, size_t) +CTL_RO_CGEN(config_stats, stats_mapped, ctl_stats->mapped, size_t) +CTL_RO_CGEN(config_stats, stats_retained, ctl_stats->retained, size_t) + +CTL_RO_CGEN(config_stats, stats_background_thread_num_threads, + ctl_stats->background_thread.num_threads, size_t) +CTL_RO_CGEN(config_stats, stats_background_thread_num_runs, + ctl_stats->background_thread.num_runs, uint64_t) +CTL_RO_CGEN(config_stats, stats_background_thread_run_interval, + nstime_ns(&ctl_stats->background_thread.run_interval), uint64_t) + +CTL_RO_GEN(stats_arenas_i_dss, arenas_i(mib[2])->dss, const char *) +CTL_RO_GEN(stats_arenas_i_dirty_decay_ms, arenas_i(mib[2])->dirty_decay_ms, + ssize_t) +CTL_RO_GEN(stats_arenas_i_muzzy_decay_ms, arenas_i(mib[2])->muzzy_decay_ms, + ssize_t) +CTL_RO_GEN(stats_arenas_i_nthreads, arenas_i(mib[2])->nthreads, unsigned) +CTL_RO_GEN(stats_arenas_i_uptime, + nstime_ns(&arenas_i(mib[2])->astats->astats.uptime), uint64_t) +CTL_RO_GEN(stats_arenas_i_pactive, arenas_i(mib[2])->pactive, size_t) +CTL_RO_GEN(stats_arenas_i_pdirty, arenas_i(mib[2])->pdirty, size_t) +CTL_RO_GEN(stats_arenas_i_pmuzzy, arenas_i(mib[2])->pmuzzy, size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_mapped, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.mapped, ATOMIC_RELAXED), + size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_retained, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.retained, ATOMIC_RELAXED), + size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_extent_avail, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.extent_avail, + ATOMIC_RELAXED), + size_t) + +CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_npurge, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.decay_dirty.npurge), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_nmadvise, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.decay_dirty.nmadvise), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_purged, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.decay_dirty.purged), uint64_t) + +CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_npurge, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.decay_muzzy.npurge), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_nmadvise, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.decay_muzzy.nmadvise), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_purged, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.decay_muzzy.purged), uint64_t) + +CTL_RO_CGEN(config_stats, stats_arenas_i_base, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.base, ATOMIC_RELAXED), + size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_internal, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.internal, ATOMIC_RELAXED), + size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_metadata_thp, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.metadata_thp, + ATOMIC_RELAXED), size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_tcache_bytes, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.tcache_bytes, + ATOMIC_RELAXED), size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_resident, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.resident, ATOMIC_RELAXED), + size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_abandoned_vm, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.abandoned_vm, + ATOMIC_RELAXED), size_t) + +CTL_RO_CGEN(config_stats, stats_arenas_i_small_allocated, + arenas_i(mib[2])->astats->allocated_small, size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_small_nmalloc, + arenas_i(mib[2])->astats->nmalloc_small, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_small_ndalloc, + arenas_i(mib[2])->astats->ndalloc_small, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_small_nrequests, + arenas_i(mib[2])->astats->nrequests_small, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_small_nfills, + arenas_i(mib[2])->astats->nfills_small, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_small_nflushes, + arenas_i(mib[2])->astats->nflushes_small, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_large_allocated, + atomic_load_zu(&arenas_i(mib[2])->astats->astats.allocated_large, + ATOMIC_RELAXED), size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_large_nmalloc, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.nmalloc_large), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_large_ndalloc, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.ndalloc_large), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_large_nrequests, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.nrequests_large), uint64_t) +/* + * Note: "nmalloc_large" here instead of "nfills" in the read. This is + * intentional (large has no batch fill). + */ +CTL_RO_CGEN(config_stats, stats_arenas_i_large_nfills, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.nmalloc_large), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_large_nflushes, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->astats.nflushes_large), uint64_t) + +/* Lock profiling related APIs below. */ +#define RO_MUTEX_CTL_GEN(n, l) \ +CTL_RO_CGEN(config_stats, stats_##n##_num_ops, \ + l.n_lock_ops, uint64_t) \ +CTL_RO_CGEN(config_stats, stats_##n##_num_wait, \ + l.n_wait_times, uint64_t) \ +CTL_RO_CGEN(config_stats, stats_##n##_num_spin_acq, \ + l.n_spin_acquired, uint64_t) \ +CTL_RO_CGEN(config_stats, stats_##n##_num_owner_switch, \ + l.n_owner_switches, uint64_t) \ +CTL_RO_CGEN(config_stats, stats_##n##_total_wait_time, \ + nstime_ns(&l.tot_wait_time), uint64_t) \ +CTL_RO_CGEN(config_stats, stats_##n##_max_wait_time, \ + nstime_ns(&l.max_wait_time), uint64_t) \ +CTL_RO_CGEN(config_stats, stats_##n##_max_num_thds, \ + l.max_n_thds, uint32_t) + +/* Global mutexes. */ +#define OP(mtx) \ + RO_MUTEX_CTL_GEN(mutexes_##mtx, \ + ctl_stats->mutex_prof_data[global_prof_mutex_##mtx]) +MUTEX_PROF_GLOBAL_MUTEXES +#undef OP + +/* Per arena mutexes */ +#define OP(mtx) RO_MUTEX_CTL_GEN(arenas_i_mutexes_##mtx, \ + arenas_i(mib[2])->astats->astats.mutex_prof_data[arena_prof_mutex_##mtx]) +MUTEX_PROF_ARENA_MUTEXES +#undef OP + +/* tcache bin mutex */ +RO_MUTEX_CTL_GEN(arenas_i_bins_j_mutex, + arenas_i(mib[2])->astats->bstats[mib[4]].mutex_data) +#undef RO_MUTEX_CTL_GEN + +/* Resets all mutex stats, including global, arena and bin mutexes. */ +static int +stats_mutexes_reset_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, + void *newp, size_t newlen) { + if (!config_stats) { + return ENOENT; + } + + tsdn_t *tsdn = tsd_tsdn(tsd); + +#define MUTEX_PROF_RESET(mtx) \ + malloc_mutex_lock(tsdn, &mtx); \ + malloc_mutex_prof_data_reset(tsdn, &mtx); \ + malloc_mutex_unlock(tsdn, &mtx); + + /* Global mutexes: ctl and prof. */ + MUTEX_PROF_RESET(ctl_mtx); + if (have_background_thread) { + MUTEX_PROF_RESET(background_thread_lock); + } + if (config_prof && opt_prof) { + MUTEX_PROF_RESET(bt2gctx_mtx); + } + + + /* Per arena mutexes. */ + unsigned n = narenas_total_get(); + + for (unsigned i = 0; i < n; i++) { + arena_t *arena = arena_get(tsdn, i, false); + if (!arena) { + continue; + } + MUTEX_PROF_RESET(arena->large_mtx); + MUTEX_PROF_RESET(arena->extent_avail_mtx); + MUTEX_PROF_RESET(arena->extents_dirty.mtx); + MUTEX_PROF_RESET(arena->extents_muzzy.mtx); + MUTEX_PROF_RESET(arena->extents_retained.mtx); + MUTEX_PROF_RESET(arena->decay_dirty.mtx); + MUTEX_PROF_RESET(arena->decay_muzzy.mtx); + MUTEX_PROF_RESET(arena->tcache_ql_mtx); + MUTEX_PROF_RESET(arena->base->mtx); + + for (szind_t i = 0; i < SC_NBINS; i++) { + for (unsigned j = 0; j < bin_infos[i].n_shards; j++) { + bin_t *bin = &arena->bins[i].bin_shards[j]; + MUTEX_PROF_RESET(bin->lock); + } + } + } +#undef MUTEX_PROF_RESET + return 0; +} + +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nmalloc, + arenas_i(mib[2])->astats->bstats[mib[4]].nmalloc, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_ndalloc, + arenas_i(mib[2])->astats->bstats[mib[4]].ndalloc, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nrequests, + arenas_i(mib[2])->astats->bstats[mib[4]].nrequests, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_curregs, + arenas_i(mib[2])->astats->bstats[mib[4]].curregs, size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nfills, + arenas_i(mib[2])->astats->bstats[mib[4]].nfills, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nflushes, + arenas_i(mib[2])->astats->bstats[mib[4]].nflushes, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nslabs, + arenas_i(mib[2])->astats->bstats[mib[4]].nslabs, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nreslabs, + arenas_i(mib[2])->astats->bstats[mib[4]].reslabs, uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_curslabs, + arenas_i(mib[2])->astats->bstats[mib[4]].curslabs, size_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nonfull_slabs, + arenas_i(mib[2])->astats->bstats[mib[4]].nonfull_slabs, size_t) + +static const ctl_named_node_t * +stats_arenas_i_bins_j_index(tsdn_t *tsdn, const size_t *mib, + size_t miblen, size_t j) { + if (j > SC_NBINS) { + return NULL; + } + return super_stats_arenas_i_bins_j_node; +} + +CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_nmalloc, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->lstats[mib[4]].nmalloc), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_ndalloc, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->lstats[mib[4]].ndalloc), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_nrequests, + ctl_arena_stats_read_u64( + &arenas_i(mib[2])->astats->lstats[mib[4]].nrequests), uint64_t) +CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_curlextents, + arenas_i(mib[2])->astats->lstats[mib[4]].curlextents, size_t) + +static const ctl_named_node_t * +stats_arenas_i_lextents_j_index(tsdn_t *tsdn, const size_t *mib, + size_t miblen, size_t j) { + if (j > SC_NSIZES - SC_NBINS) { + return NULL; + } + return super_stats_arenas_i_lextents_j_node; +} + +CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_ndirty, + atomic_load_zu( + &arenas_i(mib[2])->astats->estats[mib[4]].ndirty, + ATOMIC_RELAXED), size_t); +CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_nmuzzy, + atomic_load_zu( + &arenas_i(mib[2])->astats->estats[mib[4]].nmuzzy, + ATOMIC_RELAXED), size_t); +CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_nretained, + atomic_load_zu( + &arenas_i(mib[2])->astats->estats[mib[4]].nretained, + ATOMIC_RELAXED), size_t); +CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_dirty_bytes, + atomic_load_zu( + &arenas_i(mib[2])->astats->estats[mib[4]].dirty_bytes, + ATOMIC_RELAXED), size_t); +CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_muzzy_bytes, + atomic_load_zu( + &arenas_i(mib[2])->astats->estats[mib[4]].muzzy_bytes, + ATOMIC_RELAXED), size_t); +CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_retained_bytes, + atomic_load_zu( + &arenas_i(mib[2])->astats->estats[mib[4]].retained_bytes, + ATOMIC_RELAXED), size_t); + +static const ctl_named_node_t * +stats_arenas_i_extents_j_index(tsdn_t *tsdn, const size_t *mib, + size_t miblen, size_t j) { + if (j >= SC_NPSIZES) { + return NULL; + } + return super_stats_arenas_i_extents_j_node; +} + +static bool +ctl_arenas_i_verify(size_t i) { + size_t a = arenas_i2a_impl(i, true, true); + if (a == UINT_MAX || !ctl_arenas->arenas[a]->initialized) { + return true; + } + + return false; +} + +static const ctl_named_node_t * +stats_arenas_i_index(tsdn_t *tsdn, const size_t *mib, + size_t miblen, size_t i) { + const ctl_named_node_t *ret; + + malloc_mutex_lock(tsdn, &ctl_mtx); + if (ctl_arenas_i_verify(i)) { + ret = NULL; + goto label_return; + } + + ret = super_stats_arenas_i_node; +label_return: + malloc_mutex_unlock(tsdn, &ctl_mtx); + return ret; +} + +static int +experimental_hooks_install_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + if (oldp == NULL || oldlenp == NULL|| newp == NULL) { + ret = EINVAL; + goto label_return; + } + /* + * Note: this is a *private* struct. This is an experimental interface; + * forcing the user to know the jemalloc internals well enough to + * extract the ABI hopefully ensures nobody gets too comfortable with + * this API, which can change at a moment's notice. + */ + hooks_t hooks; + WRITE(hooks, hooks_t); + void *handle = hook_install(tsd_tsdn(tsd), &hooks); + if (handle == NULL) { + ret = EAGAIN; + goto label_return; + } + READ(handle, void *); + + ret = 0; +label_return: + return ret; +} + +static int +experimental_hooks_remove_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, + void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + WRITEONLY(); + void *handle = NULL; + WRITE(handle, void *); + if (handle == NULL) { + ret = EINVAL; + goto label_return; + } + hook_remove(tsd_tsdn(tsd), handle); + ret = 0; +label_return: + return ret; +} + +/* + * Output six memory utilization entries for an input pointer, the first one of + * type (void *) and the remaining five of type size_t, describing the following + * (in the same order): + * + * (a) memory address of the extent a potential reallocation would go into, + * == the five fields below describe about the extent the pointer resides in == + * (b) number of free regions in the extent, + * (c) number of regions in the extent, + * (d) size of the extent in terms of bytes, + * (e) total number of free regions in the bin the extent belongs to, and + * (f) total number of regions in the bin the extent belongs to. + * + * Note that "(e)" and "(f)" are only available when stats are enabled; + * otherwise their values are undefined. + * + * This API is mainly intended for small class allocations, where extents are + * used as slab. + * + * In case of large class allocations, "(a)" will be NULL, and "(e)" and "(f)" + * will be zero (if stats are enabled; otherwise undefined). The other three + * fields will be properly set though the values are trivial: "(b)" will be 0, + * "(c)" will be 1, and "(d)" will be the usable size. + * + * The input pointer and size are respectively passed in by newp and newlen, + * and the output fields and size are respectively oldp and *oldlenp. + * + * It can be beneficial to define the following macros to make it easier to + * access the output: + * + * #define SLABCUR_READ(out) (*(void **)out) + * #define COUNTS(out) ((size_t *)((void **)out + 1)) + * #define NFREE_READ(out) COUNTS(out)[0] + * #define NREGS_READ(out) COUNTS(out)[1] + * #define SIZE_READ(out) COUNTS(out)[2] + * #define BIN_NFREE_READ(out) COUNTS(out)[3] + * #define BIN_NREGS_READ(out) COUNTS(out)[4] + * + * and then write e.g. NFREE_READ(oldp) to fetch the output. See the unit test + * test_query in test/unit/extent_util.c for an example. + * + * For a typical defragmentation workflow making use of this API for + * understanding the fragmentation level, please refer to the comment for + * experimental_utilization_batch_query_ctl. + * + * It's up to the application how to determine the significance of + * fragmentation relying on the outputs returned. Possible choices are: + * + * (a) if extent utilization ratio is below certain threshold, + * (b) if extent memory consumption is above certain threshold, + * (c) if extent utilization ratio is significantly below bin utilization ratio, + * (d) if input pointer deviates a lot from potential reallocation address, or + * (e) some selection/combination of the above. + * + * The caller needs to make sure that the input/output arguments are valid, + * in particular, that the size of the output is correct, i.e.: + * + * *oldlenp = sizeof(void *) + sizeof(size_t) * 5 + * + * Otherwise, the function immediately returns EINVAL without touching anything. + * + * In the rare case where there's no associated extent found for the input + * pointer, the function zeros out all output fields and return. Please refer + * to the comment for experimental_utilization_batch_query_ctl to understand the + * motivation from C++. + */ +static int +experimental_utilization_query_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + + assert(sizeof(extent_util_stats_verbose_t) + == sizeof(void *) + sizeof(size_t) * 5); + + if (oldp == NULL || oldlenp == NULL + || *oldlenp != sizeof(extent_util_stats_verbose_t) + || newp == NULL) { + ret = EINVAL; + goto label_return; + } + + void *ptr = NULL; + WRITE(ptr, void *); + extent_util_stats_verbose_t *util_stats + = (extent_util_stats_verbose_t *)oldp; + extent_util_stats_verbose_get(tsd_tsdn(tsd), ptr, + &util_stats->nfree, &util_stats->nregs, &util_stats->size, + &util_stats->bin_nfree, &util_stats->bin_nregs, + &util_stats->slabcur_addr); + ret = 0; + +label_return: + return ret; +} + +/* + * Given an input array of pointers, output three memory utilization entries of + * type size_t for each input pointer about the extent it resides in: + * + * (a) number of free regions in the extent, + * (b) number of regions in the extent, and + * (c) size of the extent in terms of bytes. + * + * This API is mainly intended for small class allocations, where extents are + * used as slab. In case of large class allocations, the outputs are trivial: + * "(a)" will be 0, "(b)" will be 1, and "(c)" will be the usable size. + * + * Note that multiple input pointers may reside on a same extent so the output + * fields may contain duplicates. + * + * The format of the input/output looks like: + * + * input[0]: 1st_pointer_to_query | output[0]: 1st_extent_n_free_regions + * | output[1]: 1st_extent_n_regions + * | output[2]: 1st_extent_size + * input[1]: 2nd_pointer_to_query | output[3]: 2nd_extent_n_free_regions + * | output[4]: 2nd_extent_n_regions + * | output[5]: 2nd_extent_size + * ... | ... + * + * The input array and size are respectively passed in by newp and newlen, and + * the output array and size are respectively oldp and *oldlenp. + * + * It can be beneficial to define the following macros to make it easier to + * access the output: + * + * #define NFREE_READ(out, i) out[(i) * 3] + * #define NREGS_READ(out, i) out[(i) * 3 + 1] + * #define SIZE_READ(out, i) out[(i) * 3 + 2] + * + * and then write e.g. NFREE_READ(oldp, i) to fetch the output. See the unit + * test test_batch in test/unit/extent_util.c for a concrete example. + * + * A typical workflow would be composed of the following steps: + * + * (1) flush tcache: mallctl("thread.tcache.flush", ...) + * (2) initialize input array of pointers to query fragmentation + * (3) allocate output array to hold utilization statistics + * (4) query utilization: mallctl("experimental.utilization.batch_query", ...) + * (5) (optional) decide if it's worthwhile to defragment; otherwise stop here + * (6) disable tcache: mallctl("thread.tcache.enabled", ...) + * (7) defragment allocations with significant fragmentation, e.g.: + * for each allocation { + * if it's fragmented { + * malloc(...); + * memcpy(...); + * free(...); + * } + * } + * (8) enable tcache: mallctl("thread.tcache.enabled", ...) + * + * The application can determine the significance of fragmentation themselves + * relying on the statistics returned, both at the overall level i.e. step "(5)" + * and at individual allocation level i.e. within step "(7)". Possible choices + * are: + * + * (a) whether memory utilization ratio is below certain threshold, + * (b) whether memory consumption is above certain threshold, or + * (c) some combination of the two. + * + * The caller needs to make sure that the input/output arrays are valid and + * their sizes are proper as well as matched, meaning: + * + * (a) newlen = n_pointers * sizeof(const void *) + * (b) *oldlenp = n_pointers * sizeof(size_t) * 3 + * (c) n_pointers > 0 + * + * Otherwise, the function immediately returns EINVAL without touching anything. + * + * In the rare case where there's no associated extent found for some pointers, + * rather than immediately terminating the computation and raising an error, + * the function simply zeros out the corresponding output fields and continues + * the computation until all input pointers are handled. The motivations of + * such a design are as follows: + * + * (a) The function always either processes nothing or processes everything, and + * never leaves the output half touched and half untouched. + * + * (b) It facilitates usage needs especially common in C++. A vast variety of + * C++ objects are instantiated with multiple dynamic memory allocations. For + * example, std::string and std::vector typically use at least two allocations, + * one for the metadata and one for the actual content. Other types may use + * even more allocations. When inquiring about utilization statistics, the + * caller often wants to examine into all such allocations, especially internal + * one(s), rather than just the topmost one. The issue comes when some + * implementations do certain optimizations to reduce/aggregate some internal + * allocations, e.g. putting short strings directly into the metadata, and such + * decisions are not known to the caller. Therefore, we permit pointers to + * memory usages that may not be returned by previous malloc calls, and we + * provide the caller a convenient way to identify such cases. + */ +static int +experimental_utilization_batch_query_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + int ret; + + assert(sizeof(extent_util_stats_t) == sizeof(size_t) * 3); + + const size_t len = newlen / sizeof(const void *); + if (oldp == NULL || oldlenp == NULL || newp == NULL || newlen == 0 + || newlen != len * sizeof(const void *) + || *oldlenp != len * sizeof(extent_util_stats_t)) { + ret = EINVAL; + goto label_return; + } + + void **ptrs = (void **)newp; + extent_util_stats_t *util_stats = (extent_util_stats_t *)oldp; + size_t i; + for (i = 0; i < len; ++i) { + extent_util_stats_get(tsd_tsdn(tsd), ptrs[i], + &util_stats[i].nfree, &util_stats[i].nregs, + &util_stats[i].size); + } + ret = 0; + +label_return: + return ret; +} + +static const ctl_named_node_t * +experimental_arenas_i_index(tsdn_t *tsdn, const size_t *mib, + size_t miblen, size_t i) { + const ctl_named_node_t *ret; + + malloc_mutex_lock(tsdn, &ctl_mtx); + if (ctl_arenas_i_verify(i)) { + ret = NULL; + goto label_return; + } + ret = super_experimental_arenas_i_node; +label_return: + malloc_mutex_unlock(tsdn, &ctl_mtx); + return ret; +} + +static int +experimental_arenas_i_pactivep_ctl(tsd_t *tsd, const size_t *mib, + size_t miblen, void *oldp, size_t *oldlenp, void *newp, size_t newlen) { + if (!config_stats) { + return ENOENT; + } + if (oldp == NULL || oldlenp == NULL || *oldlenp != sizeof(size_t *)) { + return EINVAL; + } + + unsigned arena_ind; + arena_t *arena; + int ret; + size_t *pactivep; + + malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx); + READONLY(); + MIB_UNSIGNED(arena_ind, 2); + if (arena_ind < narenas_total_get() && (arena = + arena_get(tsd_tsdn(tsd), arena_ind, false)) != NULL) { +#if defined(JEMALLOC_GCC_ATOMIC_ATOMICS) || \ + defined(JEMALLOC_GCC_SYNC_ATOMICS) || defined(_MSC_VER) + /* Expose the underlying counter for fast read. */ + pactivep = (size_t *)&(arena->nactive.repr); + READ(pactivep, size_t *); + ret = 0; +#else + ret = EFAULT; +#endif + } else { + ret = EFAULT; + } +label_return: + malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx); + return ret; +} |