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[WIP] Synchronize the update to heap_segment_committed and heap_segment_used with allocation #41950

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[WIP] Synchronize the update to heap_segment_committed and heap_segment_used with allocation #41950

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17 changes: 14 additions & 3 deletions src/coreclr/src/gc/gc.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -9797,12 +9797,13 @@ void gc_heap::decommit_heap_segment_pages (heap_segment* seg,
if (size >= max ((extra_space + 2*OS_PAGE_SIZE), MIN_DECOMMIT_SIZE))
{
page_start += max(extra_space, 32*OS_PAGE_SIZE);
decommit_heap_segment_pages_worker (seg, page_start);
decommit_heap_segment_pages_worker (seg, page_start, true);
}
}

size_t gc_heap::decommit_heap_segment_pages_worker (heap_segment* seg,
uint8_t* new_committed)
uint8_t* new_committed,
bool synchronized)
{
assert (!use_large_pages_p);
uint8_t* page_start = align_on_page (new_committed);
Expand All @@ -9816,11 +9817,21 @@ size_t gc_heap::decommit_heap_segment_pages_worker (heap_segment* seg,
(size_t)page_start,
(size_t)(page_start + size),
size));
bool uoh_p = heap_segment_oh(seg) != gc_oh_num::soh;
GCSpinLock* msl = uoh_p ? &more_space_lock_uoh : &more_space_lock_soh;
if (!synchronized)
{
enter_spin_lock(msl);
}
heap_segment_committed (seg) = page_start;
if (heap_segment_used (seg) > heap_segment_committed (seg))
{
heap_segment_used (seg) = heap_segment_committed (seg);
}
if (!synchronized)
{
leave_spin_lock(msl);
}
}
else
{
Expand Down Expand Up @@ -32583,7 +32594,7 @@ size_t gc_heap::decommit_ephemeral_segment_pages_step ()

// figure out where the new committed should be
uint8_t* new_committed = (committed - decommit_size);
size_t size = decommit_heap_segment_pages_worker (ephemeral_heap_segment, new_committed);
size_t size = decommit_heap_segment_pages_worker (ephemeral_heap_segment, new_committed, false);

#ifdef _DEBUG
ephemeral_heap_segment->saved_committed = committed - size;
Expand Down
2 changes: 1 addition & 1 deletion src/coreclr/src/gc/gcpriv.h
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Expand Up @@ -1708,7 +1708,7 @@ class gc_heap
PER_HEAP
size_t decommit_ephemeral_segment_pages_step ();
PER_HEAP
size_t decommit_heap_segment_pages_worker (heap_segment* seg, uint8_t *new_committed);
size_t decommit_heap_segment_pages_worker (heap_segment* seg, uint8_t *new_committed, bool synchronized);
PER_HEAP_ISOLATED
bool decommit_step ();
PER_HEAP
Expand Down