/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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static size_t accumulate_large_allocs(arena_t* arena) {
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size_t total_bytes = 0;
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/* Accumulate the large allocation stats.
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* Do not include stats.allocated_large, it is only updated by
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* arena_stats_merge, and would include the data counted below.
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*/
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for (unsigned j = 0; j < NSIZES - NBINS; j++) {
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/* Read ndalloc first so that we guarantee nmalloc >= ndalloc. */
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uint64_t ndalloc = arena_stats_read_u64(TSDN_NULL, &arena->stats, &arena->stats.lstats[j].ndalloc);
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uint64_t nmalloc = arena_stats_read_u64(TSDN_NULL, &arena->stats, &arena->stats.lstats[j].nmalloc);
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size_t allocs = (size_t)(nmalloc - ndalloc);
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total_bytes += sz_index2size(NBINS + j) * allocs;
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}
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return total_bytes;
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}
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static size_t accumulate_small_allocs(arena_t* arena) {
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size_t total_bytes = 0;
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for (unsigned j = 0; j < NBINS; j++) {
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bin_t* bin = &arena->bins[j];
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/* NOTE: This includes allocations cached on every thread. */
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malloc_mutex_lock(TSDN_NULL, &bin->lock);
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total_bytes += bin_infos[j].reg_size * bin->stats.curregs;
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malloc_mutex_unlock(TSDN_NULL, &bin->lock);
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}
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return total_bytes;
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}
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/* Only use bin locks since the stats are now all atomic and can be read
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* without taking the stats lock.
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*/
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struct mallinfo je_mallinfo() {
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struct mallinfo mi;
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memset(&mi, 0, sizeof(mi));
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malloc_mutex_lock(TSDN_NULL, &arenas_lock);
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for (unsigned i = 0; i < narenas_auto; i++) {
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arena_t* arena = atomic_load_p(&arenas[i], ATOMIC_ACQUIRE);
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if (arena != NULL) {
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mi.hblkhd += atomic_load_zu(&arena->stats.mapped, ATOMIC_ACQUIRE);
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mi.uordblks += accumulate_small_allocs(arena);
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mi.uordblks += accumulate_large_allocs(arena);
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}
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}
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malloc_mutex_unlock(TSDN_NULL, &arenas_lock);
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mi.fordblks = mi.hblkhd - mi.uordblks;
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mi.usmblks = mi.hblkhd;
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return mi;
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}
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size_t je_mallinfo_narenas() {
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return narenas_auto;
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}
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size_t je_mallinfo_nbins() {
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return NBINS;
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}
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struct mallinfo je_mallinfo_arena_info(size_t aidx) {
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struct mallinfo mi;
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memset(&mi, 0, sizeof(mi));
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malloc_mutex_lock(TSDN_NULL, &arenas_lock);
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if (aidx < narenas_auto) {
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arena_t* arena = atomic_load_p(&arenas[aidx], ATOMIC_ACQUIRE);
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if (arena != NULL) {
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mi.hblkhd = atomic_load_zu(&arena->stats.mapped, ATOMIC_ACQUIRE);
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mi.ordblks = accumulate_large_allocs(arena);
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mi.fsmblks = accumulate_small_allocs(arena);
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}
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}
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malloc_mutex_unlock(TSDN_NULL, &arenas_lock);
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return mi;
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}
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struct mallinfo je_mallinfo_bin_info(size_t aidx, size_t bidx) {
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struct mallinfo mi;
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memset(&mi, 0, sizeof(mi));
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malloc_mutex_lock(TSDN_NULL, &arenas_lock);
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if (aidx < narenas_auto && bidx < NBINS) {
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arena_t* arena = atomic_load_p(&arenas[aidx], ATOMIC_ACQUIRE);
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if (arena != NULL) {
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bin_t* bin = &arena->bins[bidx];
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malloc_mutex_lock(TSDN_NULL, &bin->lock);
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mi.ordblks = bin_infos[bidx].reg_size * bin->stats.curregs;
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mi.uordblks = (size_t) bin->stats.nmalloc;
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mi.fordblks = (size_t) bin->stats.ndalloc;
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malloc_mutex_unlock(TSDN_NULL, &bin->lock);
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}
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}
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malloc_mutex_unlock(TSDN_NULL, &arenas_lock);
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return mi;
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}
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