diff options
Diffstat (limited to 'deps/jemalloc/src/prof_recent.c')
| -rw-r--r-- | deps/jemalloc/src/prof_recent.c | 600 |
1 files changed, 600 insertions, 0 deletions
diff --git a/deps/jemalloc/src/prof_recent.c b/deps/jemalloc/src/prof_recent.c new file mode 100644 index 000000000..834a9446c --- /dev/null +++ b/deps/jemalloc/src/prof_recent.c @@ -0,0 +1,600 @@ +#include "jemalloc/internal/jemalloc_preamble.h" +#include "jemalloc/internal/jemalloc_internal_includes.h" + +#include "jemalloc/internal/assert.h" +#include "jemalloc/internal/buf_writer.h" +#include "jemalloc/internal/emitter.h" +#include "jemalloc/internal/prof_data.h" +#include "jemalloc/internal/prof_recent.h" + +ssize_t opt_prof_recent_alloc_max = PROF_RECENT_ALLOC_MAX_DEFAULT; +malloc_mutex_t prof_recent_alloc_mtx; /* Protects the fields below */ +static atomic_zd_t prof_recent_alloc_max; +static ssize_t prof_recent_alloc_count = 0; +prof_recent_list_t prof_recent_alloc_list; + +malloc_mutex_t prof_recent_dump_mtx; /* Protects dumping. */ + +static void +prof_recent_alloc_max_init() { + atomic_store_zd(&prof_recent_alloc_max, opt_prof_recent_alloc_max, + ATOMIC_RELAXED); +} + +static inline ssize_t +prof_recent_alloc_max_get_no_lock() { + return atomic_load_zd(&prof_recent_alloc_max, ATOMIC_RELAXED); +} + +static inline ssize_t +prof_recent_alloc_max_get(tsd_t *tsd) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + return prof_recent_alloc_max_get_no_lock(); +} + +static inline ssize_t +prof_recent_alloc_max_update(tsd_t *tsd, ssize_t max) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + ssize_t old_max = prof_recent_alloc_max_get(tsd); + atomic_store_zd(&prof_recent_alloc_max, max, ATOMIC_RELAXED); + return old_max; +} + +static prof_recent_t * +prof_recent_allocate_node(tsdn_t *tsdn) { + return (prof_recent_t *)iallocztm(tsdn, sizeof(prof_recent_t), + sz_size2index(sizeof(prof_recent_t)), false, NULL, true, + arena_get(tsdn, 0, false), true); +} + +static void +prof_recent_free_node(tsdn_t *tsdn, prof_recent_t *node) { + assert(node != NULL); + assert(isalloc(tsdn, node) == sz_s2u(sizeof(prof_recent_t))); + idalloctm(tsdn, node, NULL, NULL, true, true); +} + +static inline void +increment_recent_count(tsd_t *tsd, prof_tctx_t *tctx) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), tctx->tdata->lock); + ++tctx->recent_count; + assert(tctx->recent_count > 0); +} + +bool +prof_recent_alloc_prepare(tsd_t *tsd, prof_tctx_t *tctx) { + cassert(config_prof); + assert(opt_prof && prof_booted); + malloc_mutex_assert_owner(tsd_tsdn(tsd), tctx->tdata->lock); + malloc_mutex_assert_not_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + + /* + * Check whether last-N mode is turned on without trying to acquire the + * lock, so as to optimize for the following two scenarios: + * (1) Last-N mode is switched off; + * (2) Dumping, during which last-N mode is temporarily turned off so + * as not to block sampled allocations. + */ + if (prof_recent_alloc_max_get_no_lock() == 0) { + return false; + } + + /* + * Increment recent_count to hold the tctx so that it won't be gone + * even after tctx->tdata->lock is released. This acts as a + * "placeholder"; the real recording of the allocation requires a lock + * on prof_recent_alloc_mtx and is done in prof_recent_alloc (when + * tctx->tdata->lock has been released). + */ + increment_recent_count(tsd, tctx); + return true; +} + +static void +decrement_recent_count(tsd_t *tsd, prof_tctx_t *tctx) { + malloc_mutex_assert_not_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + assert(tctx != NULL); + malloc_mutex_lock(tsd_tsdn(tsd), tctx->tdata->lock); + assert(tctx->recent_count > 0); + --tctx->recent_count; + prof_tctx_try_destroy(tsd, tctx); +} + +static inline edata_t * +prof_recent_alloc_edata_get_no_lock(const prof_recent_t *n) { + return (edata_t *)atomic_load_p(&n->alloc_edata, ATOMIC_ACQUIRE); +} + +edata_t * +prof_recent_alloc_edata_get_no_lock_test(const prof_recent_t *n) { + cassert(config_prof); + return prof_recent_alloc_edata_get_no_lock(n); +} + +static inline edata_t * +prof_recent_alloc_edata_get(tsd_t *tsd, const prof_recent_t *n) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + return prof_recent_alloc_edata_get_no_lock(n); +} + +static void +prof_recent_alloc_edata_set(tsd_t *tsd, prof_recent_t *n, edata_t *edata) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + atomic_store_p(&n->alloc_edata, edata, ATOMIC_RELEASE); +} + +void +edata_prof_recent_alloc_init(edata_t *edata) { + cassert(config_prof); + edata_prof_recent_alloc_set_dont_call_directly(edata, NULL); +} + +static inline prof_recent_t * +edata_prof_recent_alloc_get_no_lock(const edata_t *edata) { + cassert(config_prof); + return edata_prof_recent_alloc_get_dont_call_directly(edata); +} + +prof_recent_t * +edata_prof_recent_alloc_get_no_lock_test(const edata_t *edata) { + cassert(config_prof); + return edata_prof_recent_alloc_get_no_lock(edata); +} + +static inline prof_recent_t * +edata_prof_recent_alloc_get(tsd_t *tsd, const edata_t *edata) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_t *recent_alloc = + edata_prof_recent_alloc_get_no_lock(edata); + assert(recent_alloc == NULL || + prof_recent_alloc_edata_get(tsd, recent_alloc) == edata); + return recent_alloc; +} + +static prof_recent_t * +edata_prof_recent_alloc_update_internal(tsd_t *tsd, edata_t *edata, + prof_recent_t *recent_alloc) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_t *old_recent_alloc = + edata_prof_recent_alloc_get(tsd, edata); + edata_prof_recent_alloc_set_dont_call_directly(edata, recent_alloc); + return old_recent_alloc; +} + +static void +edata_prof_recent_alloc_set(tsd_t *tsd, edata_t *edata, + prof_recent_t *recent_alloc) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + assert(recent_alloc != NULL); + prof_recent_t *old_recent_alloc = + edata_prof_recent_alloc_update_internal(tsd, edata, recent_alloc); + assert(old_recent_alloc == NULL); + prof_recent_alloc_edata_set(tsd, recent_alloc, edata); +} + +static void +edata_prof_recent_alloc_reset(tsd_t *tsd, edata_t *edata, + prof_recent_t *recent_alloc) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + assert(recent_alloc != NULL); + prof_recent_t *old_recent_alloc = + edata_prof_recent_alloc_update_internal(tsd, edata, NULL); + assert(old_recent_alloc == recent_alloc); + assert(edata == prof_recent_alloc_edata_get(tsd, recent_alloc)); + prof_recent_alloc_edata_set(tsd, recent_alloc, NULL); +} + +/* + * This function should be called right before an allocation is released, so + * that the associated recent allocation record can contain the following + * information: + * (1) The allocation is released; + * (2) The time of the deallocation; and + * (3) The prof_tctx associated with the deallocation. + */ +void +prof_recent_alloc_reset(tsd_t *tsd, edata_t *edata) { + cassert(config_prof); + /* + * Check whether the recent allocation record still exists without + * trying to acquire the lock. + */ + if (edata_prof_recent_alloc_get_no_lock(edata) == NULL) { + return; + } + + prof_tctx_t *dalloc_tctx = prof_tctx_create(tsd); + /* + * In case dalloc_tctx is NULL, e.g. due to OOM, we will not record the + * deallocation time / tctx, which is handled later, after we check + * again when holding the lock. + */ + + if (dalloc_tctx != NULL) { + malloc_mutex_lock(tsd_tsdn(tsd), dalloc_tctx->tdata->lock); + increment_recent_count(tsd, dalloc_tctx); + dalloc_tctx->prepared = false; + malloc_mutex_unlock(tsd_tsdn(tsd), dalloc_tctx->tdata->lock); + } + + malloc_mutex_lock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + /* Check again after acquiring the lock. */ + prof_recent_t *recent = edata_prof_recent_alloc_get(tsd, edata); + if (recent != NULL) { + assert(nstime_equals_zero(&recent->dalloc_time)); + assert(recent->dalloc_tctx == NULL); + if (dalloc_tctx != NULL) { + nstime_prof_update(&recent->dalloc_time); + recent->dalloc_tctx = dalloc_tctx; + dalloc_tctx = NULL; + } + edata_prof_recent_alloc_reset(tsd, edata, recent); + } + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + + if (dalloc_tctx != NULL) { + /* We lost the rase - the allocation record was just gone. */ + decrement_recent_count(tsd, dalloc_tctx); + } +} + +static void +prof_recent_alloc_evict_edata(tsd_t *tsd, prof_recent_t *recent_alloc) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + edata_t *edata = prof_recent_alloc_edata_get(tsd, recent_alloc); + if (edata != NULL) { + edata_prof_recent_alloc_reset(tsd, edata, recent_alloc); + } +} + +static bool +prof_recent_alloc_is_empty(tsd_t *tsd) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + if (ql_empty(&prof_recent_alloc_list)) { + assert(prof_recent_alloc_count == 0); + return true; + } else { + assert(prof_recent_alloc_count > 0); + return false; + } +} + +static void +prof_recent_alloc_assert_count(tsd_t *tsd) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + if (!config_debug) { + return; + } + ssize_t count = 0; + prof_recent_t *n; + ql_foreach(n, &prof_recent_alloc_list, link) { + ++count; + } + assert(count == prof_recent_alloc_count); + assert(prof_recent_alloc_max_get(tsd) == -1 || + count <= prof_recent_alloc_max_get(tsd)); +} + +void +prof_recent_alloc(tsd_t *tsd, edata_t *edata, size_t size, size_t usize) { + cassert(config_prof); + assert(edata != NULL); + prof_tctx_t *tctx = edata_prof_tctx_get(edata); + + malloc_mutex_assert_not_owner(tsd_tsdn(tsd), tctx->tdata->lock); + malloc_mutex_lock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_alloc_assert_count(tsd); + + /* + * Reserve a new prof_recent_t node if needed. If needed, we release + * the prof_recent_alloc_mtx lock and allocate. Then, rather than + * immediately checking for OOM, we regain the lock and try to make use + * of the reserve node if needed. There are six scenarios: + * + * \ now | no need | need but OOMed | need and allocated + * later \ | | | + * ------------------------------------------------------------ + * no need | (1) | (2) | (3) + * ------------------------------------------------------------ + * need | (4) | (5) | (6) + * + * First, "(4)" never happens, because we don't release the lock in the + * middle if there's no need for a new node; in such cases "(1)" always + * takes place, which is trivial. + * + * Out of the remaining four scenarios, "(6)" is the common case and is + * trivial. "(5)" is also trivial, in which case we'll rollback the + * effect of prof_recent_alloc_prepare() as expected. + * + * "(2)" / "(3)" occurs when the need for a new node is gone after we + * regain the lock. If the new node is successfully allocated, i.e. in + * the case of "(3)", we'll release it in the end; otherwise, i.e. in + * the case of "(2)", we do nothing - we're lucky that the OOM ends up + * doing no harm at all. + * + * Therefore, the only performance cost of the "release lock" -> + * "allocate" -> "regain lock" design is the "(3)" case, but it happens + * very rarely, so the cost is relatively small compared to the gain of + * not having to have the lock order of prof_recent_alloc_mtx above all + * the allocation locks. + */ + prof_recent_t *reserve = NULL; + if (prof_recent_alloc_max_get(tsd) == -1 || + prof_recent_alloc_count < prof_recent_alloc_max_get(tsd)) { + assert(prof_recent_alloc_max_get(tsd) != 0); + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + reserve = prof_recent_allocate_node(tsd_tsdn(tsd)); + malloc_mutex_lock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_alloc_assert_count(tsd); + } + + if (prof_recent_alloc_max_get(tsd) == 0) { + assert(prof_recent_alloc_is_empty(tsd)); + goto label_rollback; + } + + prof_tctx_t *old_alloc_tctx, *old_dalloc_tctx; + if (prof_recent_alloc_count == prof_recent_alloc_max_get(tsd)) { + /* If upper limit is reached, rotate the head. */ + assert(prof_recent_alloc_max_get(tsd) != -1); + assert(!prof_recent_alloc_is_empty(tsd)); + prof_recent_t *head = ql_first(&prof_recent_alloc_list); + old_alloc_tctx = head->alloc_tctx; + assert(old_alloc_tctx != NULL); + old_dalloc_tctx = head->dalloc_tctx; + prof_recent_alloc_evict_edata(tsd, head); + ql_rotate(&prof_recent_alloc_list, link); + } else { + /* Otherwise make use of the new node. */ + assert(prof_recent_alloc_max_get(tsd) == -1 || + prof_recent_alloc_count < prof_recent_alloc_max_get(tsd)); + if (reserve == NULL) { + goto label_rollback; + } + ql_elm_new(reserve, link); + ql_tail_insert(&prof_recent_alloc_list, reserve, link); + reserve = NULL; + old_alloc_tctx = NULL; + old_dalloc_tctx = NULL; + ++prof_recent_alloc_count; + } + + /* Fill content into the tail node. */ + prof_recent_t *tail = ql_last(&prof_recent_alloc_list, link); + assert(tail != NULL); + tail->size = size; + tail->usize = usize; + nstime_copy(&tail->alloc_time, edata_prof_alloc_time_get(edata)); + tail->alloc_tctx = tctx; + nstime_init_zero(&tail->dalloc_time); + tail->dalloc_tctx = NULL; + edata_prof_recent_alloc_set(tsd, edata, tail); + + assert(!prof_recent_alloc_is_empty(tsd)); + prof_recent_alloc_assert_count(tsd); + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + + if (reserve != NULL) { + prof_recent_free_node(tsd_tsdn(tsd), reserve); + } + + /* + * Asynchronously handle the tctx of the old node, so that there's no + * simultaneous holdings of prof_recent_alloc_mtx and tdata->lock. + * In the worst case this may delay the tctx release but it's better + * than holding prof_recent_alloc_mtx for longer. + */ + if (old_alloc_tctx != NULL) { + decrement_recent_count(tsd, old_alloc_tctx); + } + if (old_dalloc_tctx != NULL) { + decrement_recent_count(tsd, old_dalloc_tctx); + } + return; + +label_rollback: + assert(edata_prof_recent_alloc_get(tsd, edata) == NULL); + prof_recent_alloc_assert_count(tsd); + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + if (reserve != NULL) { + prof_recent_free_node(tsd_tsdn(tsd), reserve); + } + decrement_recent_count(tsd, tctx); +} + +ssize_t +prof_recent_alloc_max_ctl_read() { + cassert(config_prof); + /* Don't bother to acquire the lock. */ + return prof_recent_alloc_max_get_no_lock(); +} + +static void +prof_recent_alloc_restore_locked(tsd_t *tsd, prof_recent_list_t *to_delete) { + malloc_mutex_assert_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + ssize_t max = prof_recent_alloc_max_get(tsd); + if (max == -1 || prof_recent_alloc_count <= max) { + /* Easy case - no need to alter the list. */ + ql_new(to_delete); + prof_recent_alloc_assert_count(tsd); + return; + } + + prof_recent_t *node; + ql_foreach(node, &prof_recent_alloc_list, link) { + if (prof_recent_alloc_count == max) { + break; + } + prof_recent_alloc_evict_edata(tsd, node); + --prof_recent_alloc_count; + } + assert(prof_recent_alloc_count == max); + + ql_move(to_delete, &prof_recent_alloc_list); + if (max == 0) { + assert(node == NULL); + } else { + assert(node != NULL); + ql_split(to_delete, node, &prof_recent_alloc_list, link); + } + assert(!ql_empty(to_delete)); + prof_recent_alloc_assert_count(tsd); +} + +static void +prof_recent_alloc_async_cleanup(tsd_t *tsd, prof_recent_list_t *to_delete) { + malloc_mutex_assert_not_owner(tsd_tsdn(tsd), &prof_recent_dump_mtx); + malloc_mutex_assert_not_owner(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + while (!ql_empty(to_delete)) { + prof_recent_t *node = ql_first(to_delete); + ql_remove(to_delete, node, link); + decrement_recent_count(tsd, node->alloc_tctx); + if (node->dalloc_tctx != NULL) { + decrement_recent_count(tsd, node->dalloc_tctx); + } + prof_recent_free_node(tsd_tsdn(tsd), node); + } +} + +ssize_t +prof_recent_alloc_max_ctl_write(tsd_t *tsd, ssize_t max) { + cassert(config_prof); + assert(max >= -1); + malloc_mutex_lock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_alloc_assert_count(tsd); + const ssize_t old_max = prof_recent_alloc_max_update(tsd, max); + prof_recent_list_t to_delete; + prof_recent_alloc_restore_locked(tsd, &to_delete); + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_alloc_async_cleanup(tsd, &to_delete); + return old_max; +} + +static void +prof_recent_alloc_dump_bt(emitter_t *emitter, prof_tctx_t *tctx) { + char bt_buf[2 * sizeof(intptr_t) + 3]; + char *s = bt_buf; + assert(tctx != NULL); + prof_bt_t *bt = &tctx->gctx->bt; + for (size_t i = 0; i < bt->len; ++i) { + malloc_snprintf(bt_buf, sizeof(bt_buf), "%p", bt->vec[i]); + emitter_json_value(emitter, emitter_type_string, &s); + } +} + +static void +prof_recent_alloc_dump_node(emitter_t *emitter, prof_recent_t *node) { + emitter_json_object_begin(emitter); + + emitter_json_kv(emitter, "size", emitter_type_size, &node->size); + emitter_json_kv(emitter, "usize", emitter_type_size, &node->usize); + bool released = prof_recent_alloc_edata_get_no_lock(node) == NULL; + emitter_json_kv(emitter, "released", emitter_type_bool, &released); + + emitter_json_kv(emitter, "alloc_thread_uid", emitter_type_uint64, + &node->alloc_tctx->thr_uid); + prof_tdata_t *alloc_tdata = node->alloc_tctx->tdata; + assert(alloc_tdata != NULL); + if (alloc_tdata->thread_name != NULL) { + emitter_json_kv(emitter, "alloc_thread_name", + emitter_type_string, &alloc_tdata->thread_name); + } + uint64_t alloc_time_ns = nstime_ns(&node->alloc_time); + emitter_json_kv(emitter, "alloc_time", emitter_type_uint64, + &alloc_time_ns); + emitter_json_array_kv_begin(emitter, "alloc_trace"); + prof_recent_alloc_dump_bt(emitter, node->alloc_tctx); + emitter_json_array_end(emitter); + + if (released && node->dalloc_tctx != NULL) { + emitter_json_kv(emitter, "dalloc_thread_uid", + emitter_type_uint64, &node->dalloc_tctx->thr_uid); + prof_tdata_t *dalloc_tdata = node->dalloc_tctx->tdata; + assert(dalloc_tdata != NULL); + if (dalloc_tdata->thread_name != NULL) { + emitter_json_kv(emitter, "dalloc_thread_name", + emitter_type_string, &dalloc_tdata->thread_name); + } + assert(!nstime_equals_zero(&node->dalloc_time)); + uint64_t dalloc_time_ns = nstime_ns(&node->dalloc_time); + emitter_json_kv(emitter, "dalloc_time", emitter_type_uint64, + &dalloc_time_ns); + emitter_json_array_kv_begin(emitter, "dalloc_trace"); + prof_recent_alloc_dump_bt(emitter, node->dalloc_tctx); + emitter_json_array_end(emitter); + } + + emitter_json_object_end(emitter); +} + +#define PROF_RECENT_PRINT_BUFSIZE 65536 +JEMALLOC_COLD +void +prof_recent_alloc_dump(tsd_t *tsd, write_cb_t *write_cb, void *cbopaque) { + cassert(config_prof); + malloc_mutex_lock(tsd_tsdn(tsd), &prof_recent_dump_mtx); + buf_writer_t buf_writer; + buf_writer_init(tsd_tsdn(tsd), &buf_writer, write_cb, cbopaque, NULL, + PROF_RECENT_PRINT_BUFSIZE); + emitter_t emitter; + emitter_init(&emitter, emitter_output_json_compact, buf_writer_cb, + &buf_writer); + prof_recent_list_t temp_list; + + malloc_mutex_lock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_alloc_assert_count(tsd); + ssize_t dump_max = prof_recent_alloc_max_get(tsd); + ql_move(&temp_list, &prof_recent_alloc_list); + ssize_t dump_count = prof_recent_alloc_count; + prof_recent_alloc_count = 0; + prof_recent_alloc_assert_count(tsd); + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + + emitter_begin(&emitter); + uint64_t sample_interval = (uint64_t)1U << lg_prof_sample; + emitter_json_kv(&emitter, "sample_interval", emitter_type_uint64, + &sample_interval); + emitter_json_kv(&emitter, "recent_alloc_max", emitter_type_ssize, + &dump_max); + emitter_json_array_kv_begin(&emitter, "recent_alloc"); + prof_recent_t *node; + ql_foreach(node, &temp_list, link) { + prof_recent_alloc_dump_node(&emitter, node); + } + emitter_json_array_end(&emitter); + emitter_end(&emitter); + + malloc_mutex_lock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + prof_recent_alloc_assert_count(tsd); + ql_concat(&temp_list, &prof_recent_alloc_list, link); + ql_move(&prof_recent_alloc_list, &temp_list); + prof_recent_alloc_count += dump_count; + prof_recent_alloc_restore_locked(tsd, &temp_list); + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_alloc_mtx); + + buf_writer_terminate(tsd_tsdn(tsd), &buf_writer); + malloc_mutex_unlock(tsd_tsdn(tsd), &prof_recent_dump_mtx); + + prof_recent_alloc_async_cleanup(tsd, &temp_list); +} +#undef PROF_RECENT_PRINT_BUFSIZE + +bool +prof_recent_init() { + cassert(config_prof); + prof_recent_alloc_max_init(); + + if (malloc_mutex_init(&prof_recent_alloc_mtx, "prof_recent_alloc", + WITNESS_RANK_PROF_RECENT_ALLOC, malloc_mutex_rank_exclusive)) { + return true; + } + + if (malloc_mutex_init(&prof_recent_dump_mtx, "prof_recent_dump", + WITNESS_RANK_PROF_RECENT_DUMP, malloc_mutex_rank_exclusive)) { + return true; + } + + ql_new(&prof_recent_alloc_list); + + return false; +} |