Adding upstream version 5:7.2.4.upstream/5%7.2.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4414 insertions, 0 deletions

diff --git a/deps/jemalloc/src/ctl.c b/deps/jemalloc/src/ctl.c
new file mode 100644
index 0000000..135271b
--- /dev/null
+++ b/deps/jemalloc/src/ctl.c
@@ -0,0 +1,4414 @@
+#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/inspect.h"
+#include "jemalloc/internal/mutex.h"
+#include "jemalloc/internal/nstime.h"
+#include "jemalloc/internal/peak_event.h"
+#include "jemalloc/internal/prof_data.h"
+#include "jemalloc/internal/prof_log.h"
+#include "jemalloc/internal/prof_recent.h"
+#include "jemalloc/internal/prof_stats.h"
+#include "jemalloc/internal/prof_sys.h"
+#include "jemalloc/internal/safety_check.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_peak_read)
+CTL_PROTO(thread_peak_reset)
+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(thread_idle)
+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_cache_oblivious)
+CTL_PROTO(opt_trust_madvise)
+CTL_PROTO(opt_confirm_conf)
+CTL_PROTO(opt_hpa)
+CTL_PROTO(opt_hpa_slab_max_alloc)
+CTL_PROTO(opt_hpa_hugification_threshold)
+CTL_PROTO(opt_hpa_hugify_delay_ms)
+CTL_PROTO(opt_hpa_min_purge_interval_ms)
+CTL_PROTO(opt_hpa_dirty_mult)
+CTL_PROTO(opt_hpa_sec_nshards)
+CTL_PROTO(opt_hpa_sec_max_alloc)
+CTL_PROTO(opt_hpa_sec_max_bytes)
+CTL_PROTO(opt_hpa_sec_bytes_after_flush)
+CTL_PROTO(opt_hpa_sec_batch_fill_extra)
+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_mutex_max_spin)
+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_stats_interval)
+CTL_PROTO(opt_stats_interval_opts)
+CTL_PROTO(opt_junk)
+CTL_PROTO(opt_zero)
+CTL_PROTO(opt_utrace)
+CTL_PROTO(opt_xmalloc)
+CTL_PROTO(opt_experimental_infallible_new)
+CTL_PROTO(opt_tcache)
+CTL_PROTO(opt_tcache_max)
+CTL_PROTO(opt_tcache_nslots_small_min)
+CTL_PROTO(opt_tcache_nslots_small_max)
+CTL_PROTO(opt_tcache_nslots_large)
+CTL_PROTO(opt_lg_tcache_nslots_mul)
+CTL_PROTO(opt_tcache_gc_incr_bytes)
+CTL_PROTO(opt_tcache_gc_delay_bytes)
+CTL_PROTO(opt_lg_tcache_flush_small_div)
+CTL_PROTO(opt_lg_tcache_flush_large_div)
+CTL_PROTO(opt_thp)
+CTL_PROTO(opt_lg_extent_max_active_fit)
+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_leak_error)
+CTL_PROTO(opt_prof_accum)
+CTL_PROTO(opt_prof_recent_alloc_max)
+CTL_PROTO(opt_prof_stats)
+CTL_PROTO(opt_prof_sys_thread_name)
+CTL_PROTO(opt_prof_time_res)
+CTL_PROTO(opt_lg_san_uaf_align)
+CTL_PROTO(opt_zero_realloc)
+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_oversize_threshold)
+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_prefix)
+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(prof_stats_bins_i_live)
+CTL_PROTO(prof_stats_bins_i_accum)
+INDEX_PROTO(prof_stats_bins_i)
+CTL_PROTO(prof_stats_lextents_i_live)
+CTL_PROTO(prof_stats_lextents_i_accum)
+INDEX_PROTO(prof_stats_lextents_i)
+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_hpa_shard_npurge_passes)
+CTL_PROTO(stats_arenas_i_hpa_shard_npurges)
+CTL_PROTO(stats_arenas_i_hpa_shard_nhugifies)
+CTL_PROTO(stats_arenas_i_hpa_shard_ndehugifies)
+
+/* We have a set of stats for full slabs. */
+CTL_PROTO(stats_arenas_i_hpa_shard_full_slabs_npageslabs_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_full_slabs_npageslabs_huge)
+CTL_PROTO(stats_arenas_i_hpa_shard_full_slabs_nactive_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_full_slabs_nactive_huge)
+CTL_PROTO(stats_arenas_i_hpa_shard_full_slabs_ndirty_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_full_slabs_ndirty_huge)
+
+/* A parallel set for the empty slabs. */
+CTL_PROTO(stats_arenas_i_hpa_shard_empty_slabs_npageslabs_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_empty_slabs_npageslabs_huge)
+CTL_PROTO(stats_arenas_i_hpa_shard_empty_slabs_nactive_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_empty_slabs_nactive_huge)
+CTL_PROTO(stats_arenas_i_hpa_shard_empty_slabs_ndirty_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_empty_slabs_ndirty_huge)
+
+/*
+ * And one for the slabs that are neither empty nor full, but indexed by how
+ * full they are.
+ */
+CTL_PROTO(stats_arenas_i_hpa_shard_nonfull_slabs_j_npageslabs_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_nonfull_slabs_j_npageslabs_huge)
+CTL_PROTO(stats_arenas_i_hpa_shard_nonfull_slabs_j_nactive_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_nonfull_slabs_j_nactive_huge)
+CTL_PROTO(stats_arenas_i_hpa_shard_nonfull_slabs_j_ndirty_nonhuge)
+CTL_PROTO(stats_arenas_i_hpa_shard_nonfull_slabs_j_ndirty_huge)
+
+INDEX_PROTO(stats_arenas_i_hpa_shard_nonfull_slabs_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_tcache_stashed_bytes)
+CTL_PROTO(stats_arenas_i_resident)
+CTL_PROTO(stats_arenas_i_abandoned_vm)
+CTL_PROTO(stats_arenas_i_hpa_sec_bytes)
+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(stats_zero_reallocs)
+CTL_PROTO(experimental_hooks_install)
+CTL_PROTO(experimental_hooks_remove)
+CTL_PROTO(experimental_hooks_prof_backtrace)
+CTL_PROTO(experimental_hooks_prof_dump)
+CTL_PROTO(experimental_hooks_safety_check_abort)
+CTL_PROTO(experimental_thread_activity_callback)
+CTL_PROTO(experimental_utilization_query)
+CTL_PROTO(experimental_utilization_batch_query)
+CTL_PROTO(experimental_arenas_i_pactivep)
+INDEX_PROTO(experimental_arenas_i)
+CTL_PROTO(experimental_prof_recent_alloc_max)
+CTL_PROTO(experimental_prof_recent_alloc_dump)
+CTL_PROTO(experimental_batch_alloc)
+CTL_PROTO(experimental_arenas_create_ext)
+
+#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_peak_node[] = {
+	{NAME("read"),		CTL(thread_peak_read)},
+	{NAME("reset"),		CTL(thread_peak_reset)},
+};
+
+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("peak"),		CHILD(named, thread_peak)},
+	{NAME("prof"),		CHILD(named, thread_prof)},
+	{NAME("idle"),		CTL(thread_idle)}
+};
+
+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("cache_oblivious"),	CTL(opt_cache_oblivious)},
+	{NAME("trust_madvise"),	CTL(opt_trust_madvise)},
+	{NAME("confirm_conf"),	CTL(opt_confirm_conf)},
+	{NAME("hpa"),		CTL(opt_hpa)},
+	{NAME("hpa_slab_max_alloc"),	CTL(opt_hpa_slab_max_alloc)},
+	{NAME("hpa_hugification_threshold"),
+		CTL(opt_hpa_hugification_threshold)},
+	{NAME("hpa_hugify_delay_ms"), CTL(opt_hpa_hugify_delay_ms)},
+	{NAME("hpa_min_purge_interval_ms"), CTL(opt_hpa_min_purge_interval_ms)},
+	{NAME("hpa_dirty_mult"), CTL(opt_hpa_dirty_mult)},
+	{NAME("hpa_sec_nshards"),	CTL(opt_hpa_sec_nshards)},
+	{NAME("hpa_sec_max_alloc"),	CTL(opt_hpa_sec_max_alloc)},
+	{NAME("hpa_sec_max_bytes"),	CTL(opt_hpa_sec_max_bytes)},
+	{NAME("hpa_sec_bytes_after_flush"),
+		CTL(opt_hpa_sec_bytes_after_flush)},
+	{NAME("hpa_sec_batch_fill_extra"),
+		CTL(opt_hpa_sec_batch_fill_extra)},
+	{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("mutex_max_spin"),	CTL(opt_mutex_max_spin)},
+	{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("stats_interval"),	CTL(opt_stats_interval)},
+	{NAME("stats_interval_opts"),	CTL(opt_stats_interval_opts)},
+	{NAME("junk"),		CTL(opt_junk)},
+	{NAME("zero"),		CTL(opt_zero)},
+	{NAME("utrace"),	CTL(opt_utrace)},
+	{NAME("xmalloc"),	CTL(opt_xmalloc)},
+	{NAME("experimental_infallible_new"),
+		CTL(opt_experimental_infallible_new)},
+	{NAME("tcache"),	CTL(opt_tcache)},
+	{NAME("tcache_max"),	CTL(opt_tcache_max)},
+	{NAME("tcache_nslots_small_min"),
+		CTL(opt_tcache_nslots_small_min)},
+	{NAME("tcache_nslots_small_max"),
+		CTL(opt_tcache_nslots_small_max)},
+	{NAME("tcache_nslots_large"),	CTL(opt_tcache_nslots_large)},
+	{NAME("lg_tcache_nslots_mul"),	CTL(opt_lg_tcache_nslots_mul)},
+	{NAME("tcache_gc_incr_bytes"),	CTL(opt_tcache_gc_incr_bytes)},
+	{NAME("tcache_gc_delay_bytes"),	CTL(opt_tcache_gc_delay_bytes)},
+	{NAME("lg_tcache_flush_small_div"),
+		CTL(opt_lg_tcache_flush_small_div)},
+	{NAME("lg_tcache_flush_large_div"),
+		CTL(opt_lg_tcache_flush_large_div)},
+	{NAME("thp"),		CTL(opt_thp)},
+	{NAME("lg_extent_max_active_fit"), CTL(opt_lg_extent_max_active_fit)},
+	{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_leak_error"),	CTL(opt_prof_leak_error)},
+	{NAME("prof_accum"),	CTL(opt_prof_accum)},
+	{NAME("prof_recent_alloc_max"),	CTL(opt_prof_recent_alloc_max)},
+	{NAME("prof_stats"),	CTL(opt_prof_stats)},
+	{NAME("prof_sys_thread_name"),	CTL(opt_prof_sys_thread_name)},
+	{NAME("prof_time_resolution"),	CTL(opt_prof_time_res)},
+	{NAME("lg_san_uaf_align"),	CTL(opt_lg_san_uaf_align)},
+	{NAME("zero_realloc"),	CTL(opt_zero_realloc)}
+};
+
+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)},
+	/*
+	 * Undocumented for now, since we anticipate an arena API in flux after
+	 * we cut the last 5-series release.
+	 */
+	{NAME("oversize_threshold"), CTL(arena_i_oversize_threshold)},
+	{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_stats_bins_i_node[] = {
+	{NAME("live"),		CTL(prof_stats_bins_i_live)},
+	{NAME("accum"),		CTL(prof_stats_bins_i_accum)}
+};
+
+static const ctl_named_node_t super_prof_stats_bins_i_node[] = {
+	{NAME(""),		CHILD(named, prof_stats_bins_i)}
+};
+
+static const ctl_indexed_node_t prof_stats_bins_node[] = {
+	{INDEX(prof_stats_bins_i)}
+};
+
+static const ctl_named_node_t prof_stats_lextents_i_node[] = {
+	{NAME("live"),		CTL(prof_stats_lextents_i_live)},
+	{NAME("accum"),		CTL(prof_stats_lextents_i_accum)}
+};
+
+static const ctl_named_node_t super_prof_stats_lextents_i_node[] = {
+	{NAME(""),		CHILD(named, prof_stats_lextents_i)}
+};
+
+static const ctl_indexed_node_t prof_stats_lextents_node[] = {
+	{INDEX(prof_stats_lextents_i)}
+};
+
+static const ctl_named_node_t	prof_stats_node[] = {
+	{NAME("bins"),		CHILD(indexed, prof_stats_bins)},
+	{NAME("lextents"),	CHILD(indexed, prof_stats_lextents)},
+};
+
+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("prefix"),	CTL(prof_prefix)},
+	{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)},
+	{NAME("stats"),		CHILD(named, prof_stats)}
+};
+
+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_hpa_shard_full_slabs_node[] = {
+	{NAME("npageslabs_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_full_slabs_npageslabs_nonhuge)},
+	{NAME("npageslabs_huge"),
+		CTL(stats_arenas_i_hpa_shard_full_slabs_npageslabs_huge)},
+	{NAME("nactive_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_full_slabs_nactive_nonhuge)},
+	{NAME("nactive_huge"),
+		CTL(stats_arenas_i_hpa_shard_full_slabs_nactive_huge)},
+	{NAME("ndirty_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_full_slabs_ndirty_nonhuge)},
+	{NAME("ndirty_huge"),
+		CTL(stats_arenas_i_hpa_shard_full_slabs_ndirty_huge)}
+};
+
+static const ctl_named_node_t stats_arenas_i_hpa_shard_empty_slabs_node[] = {
+	{NAME("npageslabs_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_empty_slabs_npageslabs_nonhuge)},
+	{NAME("npageslabs_huge"),
+		CTL(stats_arenas_i_hpa_shard_empty_slabs_npageslabs_huge)},
+	{NAME("nactive_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_empty_slabs_nactive_nonhuge)},
+	{NAME("nactive_huge"),
+		CTL(stats_arenas_i_hpa_shard_empty_slabs_nactive_huge)},
+	{NAME("ndirty_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_empty_slabs_ndirty_nonhuge)},
+	{NAME("ndirty_huge"),
+		CTL(stats_arenas_i_hpa_shard_empty_slabs_ndirty_huge)}
+};
+
+static const ctl_named_node_t stats_arenas_i_hpa_shard_nonfull_slabs_j_node[] = {
+	{NAME("npageslabs_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_nonfull_slabs_j_npageslabs_nonhuge)},
+	{NAME("npageslabs_huge"),
+		CTL(stats_arenas_i_hpa_shard_nonfull_slabs_j_npageslabs_huge)},
+	{NAME("nactive_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_nonfull_slabs_j_nactive_nonhuge)},
+	{NAME("nactive_huge"),
+		CTL(stats_arenas_i_hpa_shard_nonfull_slabs_j_nactive_huge)},
+	{NAME("ndirty_nonhuge"),
+		CTL(stats_arenas_i_hpa_shard_nonfull_slabs_j_ndirty_nonhuge)},
+	{NAME("ndirty_huge"),
+		CTL(stats_arenas_i_hpa_shard_nonfull_slabs_j_ndirty_huge)}
+};
+
+static const ctl_named_node_t super_stats_arenas_i_hpa_shard_nonfull_slabs_j_node[] = {
+	{NAME(""),
+		CHILD(named, stats_arenas_i_hpa_shard_nonfull_slabs_j)}
+};
+
+static const ctl_indexed_node_t stats_arenas_i_hpa_shard_nonfull_slabs_node[] =
+{
+	{INDEX(stats_arenas_i_hpa_shard_nonfull_slabs_j)}
+};
+
+static const ctl_named_node_t stats_arenas_i_hpa_shard_node[] = {
+	{NAME("full_slabs"),	CHILD(named,
+	    stats_arenas_i_hpa_shard_full_slabs)},
+	{NAME("empty_slabs"),	CHILD(named,
+	    stats_arenas_i_hpa_shard_empty_slabs)},
+	{NAME("nonfull_slabs"),	CHILD(indexed,
+	    stats_arenas_i_hpa_shard_nonfull_slabs)},
+
+	{NAME("npurge_passes"),	CTL(stats_arenas_i_hpa_shard_npurge_passes)},
+	{NAME("npurges"),	CTL(stats_arenas_i_hpa_shard_npurges)},
+	{NAME("nhugifies"),	CTL(stats_arenas_i_hpa_shard_nhugifies)},
+	{NAME("ndehugifies"),	CTL(stats_arenas_i_hpa_shard_ndehugifies)}
+};
+
+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("tcache_stashed_bytes"),
+	    CTL(stats_arenas_i_tcache_stashed_bytes)},
+	{NAME("resident"),	CTL(stats_arenas_i_resident)},
+	{NAME("abandoned_vm"),	CTL(stats_arenas_i_abandoned_vm)},
+	{NAME("hpa_sec_bytes"),	CTL(stats_arenas_i_hpa_sec_bytes)},
+	{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)},
+	{NAME("hpa_shard"),	CHILD(named, stats_arenas_i_hpa_shard)}
+};
+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)},
+	{NAME("zero_reallocs"),	CTL(stats_zero_reallocs)},
+};
+
+static const ctl_named_node_t experimental_hooks_node[] = {
+	{NAME("install"),	CTL(experimental_hooks_install)},
+	{NAME("remove"),	CTL(experimental_hooks_remove)},
+	{NAME("prof_backtrace"),	CTL(experimental_hooks_prof_backtrace)},
+	{NAME("prof_dump"),	CTL(experimental_hooks_prof_dump)},
+	{NAME("safety_check_abort"),	CTL(experimental_hooks_safety_check_abort)},
+};
+
+static const ctl_named_node_t experimental_thread_node[] = {
+	{NAME("activity_callback"),
+		CTL(experimental_thread_activity_callback)}
+};
+
+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_prof_recent_node[] = {
+	{NAME("alloc_max"),	CTL(experimental_prof_recent_alloc_max)},
+	{NAME("alloc_dump"),	CTL(experimental_prof_recent_alloc_dump)},
+};
+
+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)},
+	{NAME("arenas_create_ext"),	CTL(experimental_arenas_create_ext)},
+	{NAME("prof_recent"),	CHILD(named, experimental_prof_recent)},
+	{NAME("batch_alloc"),	CTL(experimental_batch_alloc)},
+	{NAME("thread"),	CHILD(named, experimental_thread)}
+};
+
+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_locked_u64(locked_u64_t *dst, locked_u64_t *src) {
+	locked_inc_u64_unsynchronized(dst,
+	    locked_read_u64_unsynchronized(src));
+}
+
+static void
+ctl_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_data_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(pac_estats_t));
+		memset(&ctl_arena->astats->hpastats, 0,
+		    sizeof(hpa_shard_stats_t));
+		memset(&ctl_arena->astats->secstats, 0,
+		    sizeof(sec_stats_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,
+		    &ctl_arena->astats->hpastats, &ctl_arena->astats->secstats);
+
+		for (i = 0; i < SC_NBINS; i++) {
+			bin_stats_t *bstats =
+			    &ctl_arena->astats->bstats[i].stats_data;
+			ctl_arena->astats->allocated_small += bstats->curregs *
+			    sz_index2size(i);
+			ctl_arena->astats->nmalloc_small += bstats->nmalloc;
+			ctl_arena->astats->ndalloc_small += bstats->ndalloc;
+			ctl_arena->astats->nrequests_small += bstats->nrequests;
+			ctl_arena->astats->nfills_small += bstats->nfills;
+			ctl_arena->astats->nflushes_small += bstats->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) {
+			sdstats->astats.mapped += astats->astats.mapped;
+			sdstats->astats.pa_shard_stats.pac_stats.retained
+			    += astats->astats.pa_shard_stats.pac_stats.retained;
+			sdstats->astats.pa_shard_stats.edata_avail
+			    += astats->astats.pa_shard_stats.edata_avail;
+		}
+
+		ctl_accum_locked_u64(
+		    &sdstats->astats.pa_shard_stats.pac_stats.decay_dirty.npurge,
+		    &astats->astats.pa_shard_stats.pac_stats.decay_dirty.npurge);
+		ctl_accum_locked_u64(
+		    &sdstats->astats.pa_shard_stats.pac_stats.decay_dirty.nmadvise,
+		    &astats->astats.pa_shard_stats.pac_stats.decay_dirty.nmadvise);
+		ctl_accum_locked_u64(
+		    &sdstats->astats.pa_shard_stats.pac_stats.decay_dirty.purged,
+		    &astats->astats.pa_shard_stats.pac_stats.decay_dirty.purged);
+
+		ctl_accum_locked_u64(
+		    &sdstats->astats.pa_shard_stats.pac_stats.decay_muzzy.npurge,
+		    &astats->astats.pa_shard_stats.pac_stats.decay_muzzy.npurge);
+		ctl_accum_locked_u64(
+		    &sdstats->astats.pa_shard_stats.pac_stats.decay_muzzy.nmadvise,
+		    &astats->astats.pa_shard_stats.pac_stats.decay_muzzy.nmadvise);
+		ctl_accum_locked_u64(
+		    &sdstats->astats.pa_shard_stats.pac_stats.decay_muzzy.purged,
+		    &astats->astats.pa_shard_stats.pac_stats.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) {
+			sdstats->astats.base += astats->astats.base;
+			sdstats->astats.resident += astats->astats.resident;
+			sdstats->astats.metadata_thp += astats->astats.metadata_thp;
+			ctl_accum_atomic_zu(&sdstats->astats.internal,
+			    &astats->astats.internal);
+		} 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) {
+			sdstats->astats.allocated_large +=
+			    astats->astats.allocated_large;
+		} else {
+			assert(astats->astats.allocated_large == 0);
+		}
+		sdstats->astats.nmalloc_large += astats->astats.nmalloc_large;
+		sdstats->astats.ndalloc_large += astats->astats.ndalloc_large;
+		sdstats->astats.nrequests_large
+		    += astats->astats.nrequests_large;
+		sdstats->astats.nflushes_large += astats->astats.nflushes_large;
+		ctl_accum_atomic_zu(
+		    &sdstats->astats.pa_shard_stats.pac_stats.abandoned_vm,
+		    &astats->astats.pa_shard_stats.pac_stats.abandoned_vm);
+
+		sdstats->astats.tcache_bytes += astats->astats.tcache_bytes;
+		sdstats->astats.tcache_stashed_bytes +=
+		    astats->astats.tcache_stashed_bytes;
+
+		if (ctl_arena->arena_ind == 0) {
+			sdstats->astats.uptime = astats->astats.uptime;
+		}
+
+		/* Merge bin stats. */
+		for (i = 0; i < SC_NBINS; i++) {
+			bin_stats_t *bstats = &astats->bstats[i].stats_data;
+			bin_stats_t *merged = &sdstats->bstats[i].stats_data;
+			merged->nmalloc += bstats->nmalloc;
+			merged->ndalloc += bstats->ndalloc;
+			merged->nrequests += bstats->nrequests;
+			if (!destroyed) {
+				merged->curregs += bstats->curregs;
+			} else {
+				assert(bstats->curregs == 0);
+			}
+			merged->nfills += bstats->nfills;
+			merged->nflushes += bstats->nflushes;
+			merged->nslabs += bstats->nslabs;
+			merged->reslabs += bstats->reslabs;
+			if (!destroyed) {
+				merged->curslabs += bstats->curslabs;
+				merged->nonfull_slabs += bstats->nonfull_slabs;
+			} else {
+				assert(bstats->curslabs == 0);
+				assert(bstats->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_locked_u64(&sdstats->lstats[i].nmalloc,
+			    &astats->lstats[i].nmalloc);
+			ctl_accum_locked_u64(&sdstats->lstats[i].ndalloc,
+			    &astats->lstats[i].ndalloc);
+			ctl_accum_locked_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++) {
+			sdstats->estats[i].ndirty += astats->estats[i].ndirty;
+			sdstats->estats[i].nmuzzy += astats->estats[i].nmuzzy;
+			sdstats->estats[i].nretained
+			    += astats->estats[i].nretained;
+			sdstats->estats[i].dirty_bytes
+			    += astats->estats[i].dirty_bytes;
+			sdstats->estats[i].muzzy_bytes
+			    += astats->estats[i].muzzy_bytes;
+			sdstats->estats[i].retained_bytes
+			    += astats->estats[i].retained_bytes;
+		}
+
+		/* Merge HPA stats. */
+		hpa_shard_stats_accum(&sdstats->hpastats, &astats->hpastats);
+		sec_stats_accum(&sdstats->secstats, &astats->secstats);
+	}
+}
+
+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, const arena_config_t *config) {
+	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, config) == 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_zero(&stats->run_interval);
+	}
+	malloc_mutex_prof_copy(
+	    &ctl_stats->mutex_prof_data[global_prof_mutex_max_per_bg_thd],
+	    &stats->max_counter_per_bg_thd);
+}
+
+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 +
+		    ctl_sarena->astats->astats.allocated_large;
+		ctl_stats->active = (ctl_sarena->pactive << LG_PAGE);
+		ctl_stats->metadata = ctl_sarena->astats->astats.base +
+		    atomic_load_zu(&ctl_sarena->astats->astats.internal,
+			ATOMIC_RELAXED);
+		ctl_stats->resident = ctl_sarena->astats->astats.resident;
+		ctl_stats->metadata_thp =
+		    ctl_sarena->astats->astats.metadata_thp;
+		ctl_stats->mapped = ctl_sarena->astats->astats.mapped;
+		ctl_stats->retained = ctl_sarena->astats->astats
+		    .pa_shard_stats.pac_stats.retained;
+
+		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);
+			READ_GLOBAL_MUTEX_PROF_DATA(
+			    global_prof_mutex_prof_thds_data, tdatas_mtx);
+			READ_GLOBAL_MUTEX_PROF_DATA(
+			    global_prof_mutex_prof_dump, prof_dump_mtx);
+			READ_GLOBAL_MUTEX_PROF_DATA(
+			    global_prof_mutex_prof_recent_alloc,
+			    prof_recent_alloc_mtx);
+			READ_GLOBAL_MUTEX_PROF_DATA(
+			    global_prof_mutex_prof_recent_dump,
+			    prof_recent_dump_mtx);
+			READ_GLOBAL_MUTEX_PROF_DATA(
+			    global_prof_mutex_prof_stats, prof_stats_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 ctl_named_node_t *starting_node,
+    const char *name, const ctl_named_node_t **ending_nodep, 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 = starting_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;
+					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;
+			}
+
+			mibp[i] = (size_t)index;
+		}
+
+		/* Reached the end? */
+		if (node->ctl != NULL || *dot == '\0') {
+			/* 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. */
+		elm = &dot[1];
+		dot = ((tdot = strchr(elm, '.')) != NULL) ? tdot :
+		    strchr(elm, '\0');
+		elen = (size_t)((uintptr_t)dot - (uintptr_t)elm);
+	}
+	if (ending_nodep != NULL) {
+		*ending_nodep = node;
+	}
+
+	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;
+	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), super_root_node, name, &node, mib,
+	    &depth);
+	if (ret != 0) {
+		goto label_return;
+	}
+
+	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), super_root_node, name, NULL, mibp,
+	    miblenp);
+label_return:
+	return(ret);
+}
+
+static int
+ctl_lookupbymib(tsdn_t *tsdn, const ctl_named_node_t **ending_nodep,
+    const size_t *mib, size_t miblen) {
+	int ret;
+
+	const ctl_named_node_t *node = super_root_node;
+	for (size_t 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(tsdn, mib, miblen, mib[i]);
+			if (node == NULL) {
+				ret = ENOENT;
+				goto label_return;
+			}
+		}
+	}
+	assert(ending_nodep != NULL);
+	*ending_nodep = node;
+	ret = 0;
+
+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;
+
+	if (!ctl_initialized && ctl_init(tsd)) {
+		ret = EAGAIN;
+		goto label_return;
+	}
+
+	ret = ctl_lookupbymib(tsd_tsdn(tsd), &node, mib, miblen);
+	if (ret != 0) {
+		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);
+}
+
+int
+ctl_mibnametomib(tsd_t *tsd, size_t *mib, size_t miblen, const char *name,
+    size_t *miblenp) {
+	int ret;
+	const ctl_named_node_t *node;
+
+	if (!ctl_initialized && ctl_init(tsd)) {
+		ret = EAGAIN;
+		goto label_return;
+	}
+
+	ret = ctl_lookupbymib(tsd_tsdn(tsd), &node, mib, miblen);
+	if (ret != 0) {
+		goto label_return;
+	}
+	if (node == NULL || node->ctl != NULL) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	assert(miblenp != NULL);
+	assert(*miblenp >= miblen);
+	*miblenp -= miblen;
+	ret = ctl_lookup(tsd_tsdn(tsd), node, name, NULL, mib + miblen,
+	    miblenp);
+	*miblenp += miblen;
+label_return:
+	return(ret);
+}
+
+int
+ctl_bymibname(tsd_t *tsd, size_t *mib, size_t miblen, const char *name,
+    size_t *miblenp, void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
+	int ret;
+	const ctl_named_node_t *node;
+
+	if (!ctl_initialized && ctl_init(tsd)) {
+		ret = EAGAIN;
+		goto label_return;
+	}
+
+	ret = ctl_lookupbymib(tsd_tsdn(tsd), &node, mib, miblen);
+	if (ret != 0) {
+		goto label_return;
+	}
+	if (node == NULL || node->ctl != NULL) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	assert(miblenp != NULL);
+	assert(*miblenp >= miblen);
+	*miblenp -= miblen;
+	/*
+	 * The same node supplies the starting node and stores the ending node.
+	 */
+	ret = ctl_lookup(tsd_tsdn(tsd), node, name, &node, mib + miblen,
+	    miblenp);
+	*miblenp += miblen;
+	if (ret != 0) {
+		goto label_return;
+	}
+
+	if (node != NULL && node->ctl) {
+		ret = node->ctl(tsd, mib, *miblenp, oldp, oldlenp, newp,
+		    newlen);
+	} else {
+		/* The name refers to a partial path through the ctl tree. */
+		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);
+}
+
+void
+ctl_mtx_assert_held(tsdn_t *tsdn) {
+	malloc_mutex_assert_owner(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)
+
+/* Can read or write, but not both. */
+#define READ_XOR_WRITE()	do {					\
+	if ((oldp != NULL && oldlenp != NULL) && (newp != NULL ||	\
+	    newlen != 0)) {						\
+		ret = EPERM;						\
+		goto label_return;					\
+	}								\
+} while (0)
+
+/* Can neither read nor write. */
+#define NEITHER_READ_NOR_WRITE()	do {				\
+	if (oldp != NULL || oldlenp != NULL || newp != NULL ||		\
+	    newlen != 0) {						\
+		ret = EPERM;						\
+		goto label_return;					\
+	}								\
+} while (0)
+
+/* Verify that the space provided is enough. */
+#define VERIFY_READ(t)	do {						\
+	if (oldp == NULL || oldlenp == NULL || *oldlenp != sizeof(t)) {	\
+		*oldlenp = 0;						\
+		ret = EINVAL;						\
+		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);		\
+			*oldlenp = 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 ASSURED_WRITE(v, t)	do {					\
+	if (newp == NULL || 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_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_cache_oblivious, opt_cache_oblivious, bool)
+CTL_RO_NL_GEN(opt_trust_madvise, opt_trust_madvise, bool)
+CTL_RO_NL_GEN(opt_confirm_conf, opt_confirm_conf, bool)
+
+/* HPA options. */
+CTL_RO_NL_GEN(opt_hpa, opt_hpa, bool)
+CTL_RO_NL_GEN(opt_hpa_hugification_threshold,
+    opt_hpa_opts.hugification_threshold, size_t)
+CTL_RO_NL_GEN(opt_hpa_hugify_delay_ms, opt_hpa_opts.hugify_delay_ms, uint64_t)
+CTL_RO_NL_GEN(opt_hpa_min_purge_interval_ms, opt_hpa_opts.min_purge_interval_ms,
+    uint64_t)
+
+/*
+ * This will have to change before we publicly document this option; fxp_t and
+ * its representation are internal implementation details.
+ */
+CTL_RO_NL_GEN(opt_hpa_dirty_mult, opt_hpa_opts.dirty_mult, fxp_t)
+CTL_RO_NL_GEN(opt_hpa_slab_max_alloc, opt_hpa_opts.slab_max_alloc, size_t)
+
+/* HPA SEC options */
+CTL_RO_NL_GEN(opt_hpa_sec_nshards, opt_hpa_sec_opts.nshards, size_t)
+CTL_RO_NL_GEN(opt_hpa_sec_max_alloc, opt_hpa_sec_opts.max_alloc, size_t)
+CTL_RO_NL_GEN(opt_hpa_sec_max_bytes, opt_hpa_sec_opts.max_bytes, size_t)
+CTL_RO_NL_GEN(opt_hpa_sec_bytes_after_flush, opt_hpa_sec_opts.bytes_after_flush,
+    size_t)
+CTL_RO_NL_GEN(opt_hpa_sec_batch_fill_extra, opt_hpa_sec_opts.batch_fill_extra,
+    size_t)
+
+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_mutex_max_spin, opt_mutex_max_spin, int64_t)
+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_GEN(opt_stats_interval, opt_stats_interval, int64_t)
+CTL_RO_NL_GEN(opt_stats_interval_opts, opt_stats_interval_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_CGEN(config_enable_cxx, opt_experimental_infallible_new,
+    opt_experimental_infallible_new, bool)
+CTL_RO_NL_GEN(opt_tcache, opt_tcache, bool)
+CTL_RO_NL_GEN(opt_tcache_max, opt_tcache_max, size_t)
+CTL_RO_NL_GEN(opt_tcache_nslots_small_min, opt_tcache_nslots_small_min,
+    unsigned)
+CTL_RO_NL_GEN(opt_tcache_nslots_small_max, opt_tcache_nslots_small_max,
+    unsigned)
+CTL_RO_NL_GEN(opt_tcache_nslots_large, opt_tcache_nslots_large, unsigned)
+CTL_RO_NL_GEN(opt_lg_tcache_nslots_mul, opt_lg_tcache_nslots_mul, ssize_t)
+CTL_RO_NL_GEN(opt_tcache_gc_incr_bytes, opt_tcache_gc_incr_bytes, size_t)
+CTL_RO_NL_GEN(opt_tcache_gc_delay_bytes, opt_tcache_gc_delay_bytes, size_t)
+CTL_RO_NL_GEN(opt_lg_tcache_flush_small_div, opt_lg_tcache_flush_small_div,
+    unsigned)
+CTL_RO_NL_GEN(opt_lg_tcache_flush_large_div, opt_lg_tcache_flush_large_div,
+    unsigned)
+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_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)
+CTL_RO_NL_CGEN(config_prof, opt_prof_leak_error, opt_prof_leak_error, bool)
+CTL_RO_NL_CGEN(config_prof, opt_prof_recent_alloc_max,
+    opt_prof_recent_alloc_max, ssize_t)
+CTL_RO_NL_CGEN(config_prof, opt_prof_stats, opt_prof_stats, bool)
+CTL_RO_NL_CGEN(config_prof, opt_prof_sys_thread_name, opt_prof_sys_thread_name,
+    bool)
+CTL_RO_NL_CGEN(config_prof, opt_prof_time_res,
+    prof_time_res_mode_names[opt_prof_time_res], const char *)
+CTL_RO_NL_CGEN(config_uaf_detection, opt_lg_san_uaf_align,
+    opt_lg_san_uaf_align, ssize_t)
+CTL_RO_NL_GEN(opt_zero_realloc,
+    zero_realloc_mode_names[opt_zero_realloc_action], const char *)
+
+/******************************************************************************/
+
+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, oldarena, newarena);
+		if (tcache_available(tsd)) {
+			tcache_arena_reassociate(tsd_tsdn(tsd),
+			    tsd_tcache_slowp_get(tsd), tsd_tcachep_get(tsd),
+			    newarena);
+		}
+	}
+
+	ret = 0;
+label_return:
+	return ret;
+}
+
+CTL_RO_NL_GEN(thread_allocated, tsd_thread_allocated_get(tsd), uint64_t)
+CTL_RO_NL_GEN(thread_allocatedp, tsd_thread_allocatedp_get(tsd), uint64_t *)
+CTL_RO_NL_GEN(thread_deallocated, tsd_thread_deallocated_get(tsd), uint64_t)
+CTL_RO_NL_GEN(thread_deallocatedp, tsd_thread_deallocatedp_get(tsd), 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;
+	}
+
+	NEITHER_READ_NOR_WRITE();
+
+	tcache_flush(tsd);
+
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static int
+thread_peak_read_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_stats) {
+		return ENOENT;
+	}
+	READONLY();
+	peak_event_update(tsd);
+	uint64_t result = peak_event_max(tsd);
+	READ(result, uint64_t);
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static int
+thread_peak_reset_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_stats) {
+		return ENOENT;
+	}
+	NEITHER_READ_NOR_WRITE();
+	peak_event_zero(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 || !opt_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 = opt_prof ? prof_thread_active_get(tsd) : false;
+	if (newp != NULL) {
+		if (!opt_prof) {
+			ret = ENOENT;
+			goto label_return;
+		}
+		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
+thread_idle_ctl(tsd_t *tsd, const size_t *mib,
+    size_t miblen, void *oldp, size_t *oldlenp, void *newp,
+    size_t newlen) {
+	int ret;
+
+	NEITHER_READ_NOR_WRITE();
+
+	if (tcache_available(tsd)) {
+		tcache_flush(tsd);
+	}
+	/*
+	 * This heuristic is perhaps not the most well-considered.  But it
+	 * matches the only idling policy we have experience with in the status
+	 * quo.  Over time we should investigate more principled approaches.
+	 */
+	if (opt_narenas > ncpus * 2) {
+		arena_t *arena = arena_choose(tsd, NULL);
+		if (arena != NULL) {
+			arena_decay(tsd_tsdn(tsd), arena, false, true);
+		}
+		/*
+		 * The missing arena case is not actually an error; a thread
+		 * might be idle before it associates itself to one.  This is
+		 * unusual, but not wrong.
+		 */
+	}
+
+	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();
+	VERIFY_READ(unsigned);
+	if (tcaches_create(tsd, b0get(), &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();
+	ASSURED_WRITE(tcache_ind, unsigned);
+	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();
+	ASSURED_WRITE(tcache_ind, unsigned);
+	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;
+
+	NEITHER_READ_NOR_WRITE();
+	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;
+
+	NEITHER_READ_NOR_WRITE();
+	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;
+
+	NEITHER_READ_NOR_WRITE();
+	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;
+
+	malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
+
+	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:
+	malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
+
+	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_oversize_threshold_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;
+	MIB_UNSIGNED(arena_ind, 1);
+
+	arena_t *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 = atomic_load_zu(
+		    &arena->pa_shard.pac.oversize_threshold, ATOMIC_RELAXED);
+		READ(oldval, size_t);
+	}
+	if (newp != NULL) {
+		if (newlen != sizeof(size_t)) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		atomic_store_zu(&arena->pa_shard.pac.oversize_threshold,
+		    *(size_t *)newp, ATOMIC_RELAXED);
+	}
+	ret = 0;
+label_return:
+	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;
+	}
+	extent_state_t state = dirty ? extent_state_dirty : extent_state_muzzy;
+
+	if (oldp != NULL && oldlenp != NULL) {
+		size_t oldval = arena_decay_ms_get(arena, state);
+		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 (arena_decay_ms_set(tsd_tsdn(tsd), arena, state,
+		    *(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 *)&ehooks_default_extent_hooks;
+			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_config_t config = arena_config_default;
+				config.extent_hooks = new_extent_hooks;
+
+				arena = arena_init(tsd_tsdn(tsd), arena_ind,
+				    &config);
+				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 = arena_set_extent_hooks(tsd,
+				    arena, new_extent_hooks);
+				READ(old_extent_hooks, extent_hooks_t *);
+			} else {
+				old_extent_hooks =
+				    ehooks_get_extent_hooks_ptr(
+					arena_get_ehooks(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();
+	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;
+	unsigned arena_ind;
+
+	malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
+
+	VERIFY_READ(unsigned);
+	arena_config_t config = arena_config_default;
+	WRITE(config.extent_hooks, extent_hooks_t *);
+	if ((arena_ind = ctl_arena_init(tsd, &config)) == 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
+experimental_arenas_create_ext_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;
+
+	malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
+
+	arena_config_t config = arena_config_default;
+	VERIFY_READ(unsigned);
+	WRITE(config, arena_config_t);
+
+	if ((arena_ind = ctl_arena_init(tsd, &config)) == 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;
+	edata_t *edata;
+	arena_t *arena;
+
+	ptr = NULL;
+	ret = EINVAL;
+	malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
+	WRITE(ptr, void *);
+	edata = emap_edata_lookup(tsd_tsdn(tsd), &arena_emap_global, ptr);
+	if (edata == NULL) {
+		goto label_return;
+	}
+
+	arena = arena_get_from_edata(edata);
+	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 (!opt_prof) {
+			ret = ENOENT;
+			goto label_return;
+		}
+		if (newlen != sizeof(bool)) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		oldval = prof_thread_active_init_set(tsd_tsdn(tsd),
+		    *(bool *)newp);
+	} else {
+		oldval = opt_prof ? prof_thread_active_init_get(tsd_tsdn(tsd)) :
+		    false;
+	}
+	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) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	if (newp != NULL) {
+		if (newlen != sizeof(bool)) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		bool val = *(bool *)newp;
+		if (!opt_prof) {
+			if (val) {
+				ret = ENOENT;
+				goto label_return;
+			} else {
+				/* No change needed (already off). */
+				oldval = false;
+			}
+		} else {
+			oldval = prof_active_set(tsd_tsdn(tsd), val);
+		}
+	} else {
+		oldval = opt_prof ? prof_active_get(tsd_tsdn(tsd)) : false;
+	}
+	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 || !opt_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 (!opt_prof) {
+			ret = ENOENT;
+			goto label_return;
+		}
+		if (newlen != sizeof(bool)) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		oldval = prof_gdump_set(tsd_tsdn(tsd), *(bool *)newp);
+	} else {
+		oldval = opt_prof ? prof_gdump_get(tsd_tsdn(tsd)) : false;
+	}
+	READ(oldval, bool);
+
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static int
+prof_prefix_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 *prefix = NULL;
+
+	if (!config_prof || !opt_prof) {
+		return ENOENT;
+	}
+
+	malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
+	WRITEONLY();
+	WRITE(prefix, const char *);
+
+	ret = prof_prefix_set(tsd_tsdn(tsd), prefix) ? EFAULT : 0;
+label_return:
+	malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
+	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 || !opt_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 || !opt_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 || !opt_prof) {
+		return ENOENT;
+	}
+
+	if (prof_log_stop(tsd_tsdn(tsd))) {
+		return EFAULT;
+	}
+
+	return 0;
+}
+
+static int
+experimental_hooks_prof_backtrace_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 && newp == NULL) {
+		ret = EINVAL;
+		goto label_return;
+	}
+	if (oldp != NULL) {
+		prof_backtrace_hook_t old_hook =
+		    prof_backtrace_hook_get();
+		READ(old_hook, prof_backtrace_hook_t);
+	}
+	if (newp != NULL) {
+		if (!opt_prof) {
+			ret = ENOENT;
+			goto label_return;
+		}
+		prof_backtrace_hook_t new_hook JEMALLOC_CC_SILENCE_INIT(NULL);
+		WRITE(new_hook, prof_backtrace_hook_t);
+		if (new_hook == NULL) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		prof_backtrace_hook_set(new_hook);
+	}
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static int
+experimental_hooks_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;
+
+	if (oldp == NULL && newp == NULL) {
+		ret = EINVAL;
+		goto label_return;
+	}
+	if (oldp != NULL) {
+		prof_dump_hook_t old_hook =
+		    prof_dump_hook_get();
+		READ(old_hook, prof_dump_hook_t);
+	}
+	if (newp != NULL) {
+		if (!opt_prof) {
+			ret = ENOENT;
+			goto label_return;
+		}
+		prof_dump_hook_t new_hook JEMALLOC_CC_SILENCE_INIT(NULL);
+		WRITE(new_hook, prof_dump_hook_t);
+		prof_dump_hook_set(new_hook);
+	}
+	ret = 0;
+label_return:
+	return ret;
+}
+
+/* For integration test purpose only.  No plan to move out of experimental. */
+static int
+experimental_hooks_safety_check_abort_ctl(tsd_t *tsd, const size_t *mib,
+    size_t miblen, void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
+	int ret;
+
+	WRITEONLY();
+	if (newp != NULL) {
+		if (newlen != sizeof(safety_check_abort_hook_t)) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		safety_check_abort_hook_t hook JEMALLOC_CC_SILENCE_INIT(NULL);
+		WRITE(hook, safety_check_abort_hook_t);
+		safety_check_set_abort(hook);
+	}
+	ret = 0;
+label_return:
+	return ret;
+}
+
+/******************************************************************************/
+
+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_CGEN(config_stats, stats_zero_reallocs,
+    atomic_load_zu(&zero_realloc_count, ATOMIC_RELAXED), size_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,
+    arenas_i(mib[2])->astats->astats.mapped, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_retained,
+    arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.retained, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_extent_avail,
+    arenas_i(mib[2])->astats->astats.pa_shard_stats.edata_avail, size_t)
+
+CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_npurge,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.decay_dirty.npurge),
+    uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_nmadvise,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.decay_dirty.nmadvise),
+    uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_purged,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.decay_dirty.purged),
+    uint64_t)
+
+CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_npurge,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.decay_muzzy.npurge),
+    uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_nmadvise,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.decay_muzzy.nmadvise),
+    uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_purged,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.decay_muzzy.purged),
+    uint64_t)
+
+CTL_RO_CGEN(config_stats, stats_arenas_i_base,
+    arenas_i(mib[2])->astats->astats.base,
+    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,
+    arenas_i(mib[2])->astats->astats.metadata_thp, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_tcache_bytes,
+    arenas_i(mib[2])->astats->astats.tcache_bytes, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_tcache_stashed_bytes,
+    arenas_i(mib[2])->astats->astats.tcache_stashed_bytes, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_resident,
+    arenas_i(mib[2])->astats->astats.resident,
+    size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_abandoned_vm,
+    atomic_load_zu(
+    &arenas_i(mib[2])->astats->astats.pa_shard_stats.pac_stats.abandoned_vm,
+    ATOMIC_RELAXED), size_t)
+
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_sec_bytes,
+    arenas_i(mib[2])->astats->secstats.bytes, 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,
+    arenas_i(mib[2])->astats->astats.allocated_large, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_large_nmalloc,
+    arenas_i(mib[2])->astats->astats.nmalloc_large, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_large_ndalloc,
+    arenas_i(mib[2])->astats->astats.ndalloc_large, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_large_nrequests,
+    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,
+    arenas_i(mib[2])->astats->astats.nmalloc_large, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_large_nflushes,
+    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);
+		MUTEX_PROF_RESET(tdatas_mtx);
+		MUTEX_PROF_RESET(prof_dump_mtx);
+		MUTEX_PROF_RESET(prof_recent_alloc_mtx);
+		MUTEX_PROF_RESET(prof_recent_dump_mtx);
+		MUTEX_PROF_RESET(prof_stats_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->pa_shard.edata_cache.mtx);
+		MUTEX_PROF_RESET(arena->pa_shard.pac.ecache_dirty.mtx);
+		MUTEX_PROF_RESET(arena->pa_shard.pac.ecache_muzzy.mtx);
+		MUTEX_PROF_RESET(arena->pa_shard.pac.ecache_retained.mtx);
+		MUTEX_PROF_RESET(arena->pa_shard.pac.decay_dirty.mtx);
+		MUTEX_PROF_RESET(arena->pa_shard.pac.decay_muzzy.mtx);
+		MUTEX_PROF_RESET(arena->tcache_ql_mtx);
+		MUTEX_PROF_RESET(arena->base->mtx);
+
+		for (szind_t j = 0; j < SC_NBINS; j++) {
+			for (unsigned k = 0; k < bin_infos[j].n_shards; k++) {
+				bin_t *bin = arena_get_bin(arena, j, k);
+				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]].stats_data.nmalloc, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_ndalloc,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.ndalloc, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nrequests,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.nrequests, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_curregs,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.curregs, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nfills,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.nfills, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nflushes,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.nflushes, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nslabs,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.nslabs, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nreslabs,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.reslabs, uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_curslabs,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.curslabs, size_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nonfull_slabs,
+    arenas_i(mib[2])->astats->bstats[mib[4]].stats_data.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,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->lstats[mib[4]].nmalloc), uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_ndalloc,
+    locked_read_u64_unsynchronized(
+    &arenas_i(mib[2])->astats->lstats[mib[4]].ndalloc), uint64_t)
+CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_nrequests,
+    locked_read_u64_unsynchronized(
+    &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,
+        arenas_i(mib[2])->astats->estats[mib[4]].ndirty, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_nmuzzy,
+        arenas_i(mib[2])->astats->estats[mib[4]].nmuzzy, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_nretained,
+        arenas_i(mib[2])->astats->estats[mib[4]].nretained, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_dirty_bytes,
+        arenas_i(mib[2])->astats->estats[mib[4]].dirty_bytes, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_muzzy_bytes,
+        arenas_i(mib[2])->astats->estats[mib[4]].muzzy_bytes, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_extents_j_retained_bytes,
+        arenas_i(mib[2])->astats->estats[mib[4]].retained_bytes, 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;
+}
+
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_npurge_passes,
+    arenas_i(mib[2])->astats->hpastats.nonderived_stats.npurge_passes, uint64_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_npurges,
+    arenas_i(mib[2])->astats->hpastats.nonderived_stats.npurges, uint64_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_nhugifies,
+    arenas_i(mib[2])->astats->hpastats.nonderived_stats.nhugifies, uint64_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_ndehugifies,
+    arenas_i(mib[2])->astats->hpastats.nonderived_stats.ndehugifies, uint64_t);
+
+/* Full, nonhuge */
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_full_slabs_npageslabs_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.full_slabs[0].npageslabs,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_full_slabs_nactive_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.full_slabs[0].nactive, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_full_slabs_ndirty_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.full_slabs[0].ndirty, size_t);
+
+/* Full, huge */
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_full_slabs_npageslabs_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.full_slabs[1].npageslabs,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_full_slabs_nactive_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.full_slabs[1].nactive, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_full_slabs_ndirty_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.full_slabs[1].ndirty, size_t);
+
+/* Empty, nonhuge */
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_empty_slabs_npageslabs_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.empty_slabs[0].npageslabs,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_empty_slabs_nactive_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.empty_slabs[0].nactive, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_empty_slabs_ndirty_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.empty_slabs[0].ndirty, size_t);
+
+/* Empty, huge */
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_empty_slabs_npageslabs_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.empty_slabs[1].npageslabs,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_empty_slabs_nactive_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.empty_slabs[1].nactive, size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_empty_slabs_ndirty_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.empty_slabs[1].ndirty, size_t);
+
+/* Nonfull, nonhuge */
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_nonfull_slabs_j_npageslabs_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.nonfull_slabs[mib[5]][0].npageslabs,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_nonfull_slabs_j_nactive_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.nonfull_slabs[mib[5]][0].nactive,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_nonfull_slabs_j_ndirty_nonhuge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.nonfull_slabs[mib[5]][0].ndirty,
+    size_t);
+
+/* Nonfull, huge */
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_nonfull_slabs_j_npageslabs_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.nonfull_slabs[mib[5]][1].npageslabs,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_nonfull_slabs_j_nactive_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.nonfull_slabs[mib[5]][1].nactive,
+    size_t);
+CTL_RO_CGEN(config_stats, stats_arenas_i_hpa_shard_nonfull_slabs_j_ndirty_huge,
+    arenas_i(mib[2])->astats->hpastats.psset_stats.nonfull_slabs[mib[5]][1].ndirty,
+    size_t);
+
+static const ctl_named_node_t *
+stats_arenas_i_hpa_shard_nonfull_slabs_j_index(tsdn_t *tsdn, const size_t *mib,
+    size_t miblen, size_t j) {
+	if (j >= PSSET_NPSIZES) {
+		return NULL;
+	}
+	return super_stats_arenas_i_hpa_shard_nonfull_slabs_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;
+}
+
+static int
+experimental_thread_activity_callback_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_stats) {
+		return ENOENT;
+	}
+
+	activity_callback_thunk_t t_old = tsd_activity_callback_thunk_get(tsd);
+	READ(t_old, activity_callback_thunk_t);
+
+	if (newp != NULL) {
+		/*
+		 * This initialization is unnecessary.  If it's omitted, though,
+		 * clang gets confused and warns on the subsequent use of t_new.
+		 */
+		activity_callback_thunk_t t_new = {NULL, NULL};
+		WRITE(t_new, activity_callback_thunk_t);
+		tsd_activity_callback_thunk_set(tsd, t_new);
+	}
+	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.  Note that if the bin the extent belongs to is completely
+ * full, "(a)" will be NULL.
+ *
+ * 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(inspect_extent_util_stats_verbose_t)
+	    == sizeof(void *) + sizeof(size_t) * 5);
+
+	if (oldp == NULL || oldlenp == NULL
+	    || *oldlenp != sizeof(inspect_extent_util_stats_verbose_t)
+	    || newp == NULL) {
+		ret = EINVAL;
+		goto label_return;
+	}
+
+	void *ptr = NULL;
+	WRITE(ptr, void *);
+	inspect_extent_util_stats_verbose_t *util_stats
+	    = (inspect_extent_util_stats_verbose_t *)oldp;
+	inspect_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(inspect_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(inspect_extent_util_stats_t)) {
+		ret = EINVAL;
+		goto label_return;
+	}
+
+	void **ptrs = (void **)newp;
+	inspect_extent_util_stats_t *util_stats =
+	    (inspect_extent_util_stats_t *)oldp;
+	size_t i;
+	for (i = 0; i < len; ++i) {
+		inspect_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->pa_shard.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;
+}
+
+static int
+experimental_prof_recent_alloc_max_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 && opt_prof)) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	ssize_t old_max;
+	if (newp != NULL) {
+		if (newlen != sizeof(ssize_t)) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		ssize_t max = *(ssize_t *)newp;
+		if (max < -1) {
+			ret = EINVAL;
+			goto label_return;
+		}
+		old_max = prof_recent_alloc_max_ctl_write(tsd, max);
+	} else {
+		old_max = prof_recent_alloc_max_ctl_read();
+	}
+	READ(old_max, ssize_t);
+
+	ret = 0;
+
+label_return:
+	return ret;
+}
+
+typedef struct write_cb_packet_s write_cb_packet_t;
+struct write_cb_packet_s {
+	write_cb_t *write_cb;
+	void *cbopaque;
+};
+
+static int
+experimental_prof_recent_alloc_dump_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 && opt_prof)) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	assert(sizeof(write_cb_packet_t) == sizeof(void *) * 2);
+
+	WRITEONLY();
+	write_cb_packet_t write_cb_packet;
+	ASSURED_WRITE(write_cb_packet, write_cb_packet_t);
+
+	prof_recent_alloc_dump(tsd, write_cb_packet.write_cb,
+	    write_cb_packet.cbopaque);
+
+	ret = 0;
+
+label_return:
+	return ret;
+}
+
+typedef struct batch_alloc_packet_s batch_alloc_packet_t;
+struct batch_alloc_packet_s {
+	void **ptrs;
+	size_t num;
+	size_t size;
+	int flags;
+};
+
+static int
+experimental_batch_alloc_ctl(tsd_t *tsd, const size_t *mib,
+    size_t miblen, void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
+	int ret;
+
+	VERIFY_READ(size_t);
+
+	batch_alloc_packet_t batch_alloc_packet;
+	ASSURED_WRITE(batch_alloc_packet, batch_alloc_packet_t);
+	size_t filled = batch_alloc(batch_alloc_packet.ptrs,
+	    batch_alloc_packet.num, batch_alloc_packet.size,
+	    batch_alloc_packet.flags);
+	READ(filled, size_t);
+
+	ret = 0;
+
+label_return:
+	return ret;
+}
+
+static int
+prof_stats_bins_i_live_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
+    void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
+	int ret;
+	unsigned binind;
+	prof_stats_t stats;
+
+	if (!(config_prof && opt_prof && opt_prof_stats)) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	READONLY();
+	MIB_UNSIGNED(binind, 3);
+	if (binind >= SC_NBINS) {
+		ret = EINVAL;
+		goto label_return;
+	}
+	prof_stats_get_live(tsd, (szind_t)binind, &stats);
+	READ(stats, prof_stats_t);
+
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static int
+prof_stats_bins_i_accum_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
+    void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
+	int ret;
+	unsigned binind;
+	prof_stats_t stats;
+
+	if (!(config_prof && opt_prof && opt_prof_stats)) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	READONLY();
+	MIB_UNSIGNED(binind, 3);
+	if (binind >= SC_NBINS) {
+		ret = EINVAL;
+		goto label_return;
+	}
+	prof_stats_get_accum(tsd, (szind_t)binind, &stats);
+	READ(stats, prof_stats_t);
+
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static const ctl_named_node_t *
+prof_stats_bins_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
+    size_t i) {
+	if (!(config_prof && opt_prof && opt_prof_stats)) {
+		return NULL;
+	}
+	if (i >= SC_NBINS) {
+		return NULL;
+	}
+	return super_prof_stats_bins_i_node;
+}
+
+static int
+prof_stats_lextents_i_live_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
+    void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
+	int ret;
+	unsigned lextent_ind;
+	prof_stats_t stats;
+
+	if (!(config_prof && opt_prof && opt_prof_stats)) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	READONLY();
+	MIB_UNSIGNED(lextent_ind, 3);
+	if (lextent_ind >= SC_NSIZES - SC_NBINS) {
+		ret = EINVAL;
+		goto label_return;
+	}
+	prof_stats_get_live(tsd, (szind_t)(lextent_ind + SC_NBINS), &stats);
+	READ(stats, prof_stats_t);
+
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static int
+prof_stats_lextents_i_accum_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
+    void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
+	int ret;
+	unsigned lextent_ind;
+	prof_stats_t stats;
+
+	if (!(config_prof && opt_prof && opt_prof_stats)) {
+		ret = ENOENT;
+		goto label_return;
+	}
+
+	READONLY();
+	MIB_UNSIGNED(lextent_ind, 3);
+	if (lextent_ind >= SC_NSIZES - SC_NBINS) {
+		ret = EINVAL;
+		goto label_return;
+	}
+	prof_stats_get_accum(tsd, (szind_t)(lextent_ind + SC_NBINS), &stats);
+	READ(stats, prof_stats_t);
+
+	ret = 0;
+label_return:
+	return ret;
+}
+
+static const ctl_named_node_t *
+prof_stats_lextents_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
+    size_t i) {
+	if (!(config_prof && opt_prof && opt_prof_stats)) {
+		return NULL;
+	}
+	if (i >= SC_NSIZES - SC_NBINS) {
+		return NULL;
+	}
+	return super_prof_stats_lextents_i_node;
+}