1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
je_stats_arena(size_t arena_index,void (* callback)(size_t,size_t,size_t))17 void je_stats_arena(size_t arena_index, void (*callback)(size_t, size_t, size_t)) {
18 malloc_mutex_lock(TSDN_NULL, &arenas_lock);
19 arena_t* arena = atomic_load_p(&arenas[arena_index], ATOMIC_ACQUIRE);
20 if (arena == NULL) {
21 malloc_mutex_unlock(TSDN_NULL, &arenas_lock);
22 return;
23 }
24
25 for (unsigned j = 0; j < NBINS; j++) {
26 bin_t* bin = &arena->bins[j];
27
28 /* NOTE: This includes allocations cached on every thread. */
29 malloc_mutex_lock(TSDN_NULL, &bin->lock);
30 callback(j, bin_infos[j].reg_size, bin->stats.curregs);
31 malloc_mutex_unlock(TSDN_NULL, &bin->lock);
32 }
33
34 /* Accumulate the large allocation stats.
35 * Do not include stats.allocated_large, it is only updated by
36 * arena_stats_merge, and would include the data counted below.
37 */
38 for (unsigned j = NBINS; j < NSIZES; j++) {
39 /* Read ndalloc first so that we guarantee nmalloc >= ndalloc. */
40 uint64_t ndalloc = arena_stats_read_u64(TSDN_NULL, &arena->stats, &arena->stats.lstats[j - NBINS].ndalloc);
41 uint64_t nmalloc = arena_stats_read_u64(TSDN_NULL, &arena->stats, &arena->stats.lstats[j - NBINS].nmalloc);
42 callback(j, sz_index2size(j), (size_t)(nmalloc - ndalloc));
43 }
44 malloc_mutex_unlock(TSDN_NULL, &arenas_lock);
45 }
46