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malloc: Account for all heaps in an arena in malloc_info [BZ #22439]
This commit adds a "subheaps" field to the malloc_info output that shows the number of heaps that were allocated to extend a non-main arena. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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@ -1,3 +1,9 @@
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2017-11-15 Florian Weimer <fweimer@redhat.com>
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[BZ #22439]
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* malloc/malloc.c (__malloc_info): Count all heaps in an arena,
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not just the top one. Output a new "subheaps" statistic.
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2017-11-15 Florian Weimer <fweimer@redhat.com>
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[BZ #22408]
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3
NEWS
3
NEWS
@ -63,6 +63,9 @@ Deprecated and removed features, and other changes affecting compatibility:
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* The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
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the specified string can be parsed as a domain name.
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* In the malloc_info output, the <heap> element may contain another <aspace>
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element, "subheaps", which contains the number of sub-heaps.
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Changes to build and runtime requirements:
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[Add changes to build and runtime requirements here]
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@ -5457,11 +5457,19 @@ __malloc_info (int options, FILE *fp)
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size_t heap_size = 0;
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size_t heap_mprotect_size = 0;
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size_t heap_count = 0;
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if (ar_ptr != &main_arena)
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{
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/* Iterate over the arena heaps from back to front. */
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heap_info *heap = heap_for_ptr (top (ar_ptr));
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heap_size = heap->size;
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heap_mprotect_size = heap->mprotect_size;
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do
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{
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heap_size += heap->size;
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heap_mprotect_size += heap->mprotect_size;
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heap = heap->prev;
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++heap_count;
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}
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while (heap != NULL);
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}
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__libc_lock_unlock (ar_ptr->mutex);
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@ -5499,8 +5507,9 @@ __malloc_info (int options, FILE *fp)
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{
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fprintf (fp,
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"<aspace type=\"total\" size=\"%zu\"/>\n"
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"<aspace type=\"mprotect\" size=\"%zu\"/>\n",
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heap_size, heap_mprotect_size);
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"<aspace type=\"mprotect\" size=\"%zu\"/>\n"
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"<aspace type=\"subheaps\" size=\"%zu\"/>\n",
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heap_size, heap_mprotect_size, heap_count);
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total_aspace += heap_size;
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total_aspace_mprotect += heap_mprotect_size;
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}
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