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author | Christopher Ferris <cferris@google.com> | 2018-11-26 18:50:53 -0800 |
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committer | android-build-merger <android-build-merger@google.com> | 2018-11-26 18:50:53 -0800 |
commit | a2b4c8c34aa20418f8dd83f66bc0707116a9cca5 (patch) | |
tree | caafaad03b4f2425f11b025ee8409c0ba12e2268 | |
parent | a2f01810502bb35f7e6c77746170996e50836030 (diff) | |
parent | 76937732206c9fada85e5f24797505cc434844b9 (diff) | |
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Fix mallinfo counting for large allocations. am: 08ccc19933
am: 7693773220
Change-Id: Ia1f9ba21ab7a255f2e6013c8ea7d611d9afb7dd1
-rw-r--r-- | src/android_je_mallinfo.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/android_je_mallinfo.c b/src/android_je_mallinfo.c index 32661c21..8a7ff232 100644 --- a/src/android_je_mallinfo.c +++ b/src/android_je_mallinfo.c @@ -26,15 +26,28 @@ struct mallinfo je_mallinfo() { arena_t* arena = atomic_load_p(&arenas[i], ATOMIC_ACQUIRE); if (arena != NULL) { mi.hblkhd += atomic_load_zu(&arena->stats.mapped, ATOMIC_ACQUIRE); - mi.uordblks += atomic_load_zu(&arena->stats.allocated_large, ATOMIC_ACQUIRE); + /* Accumulate the small bins. */ for (unsigned j = 0; j < NBINS; j++) { bin_t* bin = &arena->bins[j]; + /* NOTE: This includes allocations cached on every thread. */ malloc_mutex_lock(TSDN_NULL, &bin->lock); mi.uordblks += bin_infos[j].reg_size * bin->stats.curregs; malloc_mutex_unlock(TSDN_NULL, &bin->lock); } + + /* Accumulate the large allocation stats. + * Do not include stats.allocated_large, it is only updated by + * arena_stats_merge, and would include the data counted below. + */ + for (unsigned j = 0; j < NSIZES - NBINS; j++) { + /* Read ndalloc first so that we guarantee nmalloc >= ndalloc. */ + uint64_t ndalloc = arena_stats_read_u64(TSDN_NULL, &arena->stats, &arena->stats.lstats[j].ndalloc); + uint64_t nmalloc = arena_stats_read_u64(TSDN_NULL, &arena->stats, &arena->stats.lstats[j].nmalloc); + size_t allocs = (size_t)(nmalloc - ndalloc); + mi.uordblks += sz_index2size(NBINS + j) * allocs; + } } } malloc_mutex_unlock(TSDN_NULL, &arenas_lock); |