Fix filtering of store buffer for large object pages.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 4da83e859e3ddff3f2988c00f066ab63ddf58c04..8a844e4a1e616f61f5660bad0bee816816f0e8a7 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -6392,8 +6392,8 @@ void Heap::FreeQueuedChunks() {
       // it try to perform a search in the list of pages owned by of the large
       // object space and queued chunks were detached from that list.
       // To work around this we split large chunk into normal kPageSize aligned
-      // pieces and initialize owner field and flags of every piece.
-      // If FromAnyPointerAddress encounteres a slot that belongs to one of
+      // pieces and initialize size, owner and flags field of every piece.
+      // If FromAnyPointerAddress encounters a slot that belongs to one of
       // these smaller pieces it will treat it as a slot on a normal Page.
       MemoryChunk* inner = MemoryChunk::FromAddress(
           chunk->address() + Page::kPageSize);
@@ -6401,8 +6401,9 @@ void Heap::FreeQueuedChunks() {
           chunk->address() + chunk->size() - 1);
       while (inner <= inner_last) {
         // Size of a large chunk is always a multiple of
-        // OS::AllocationAlignment() so there is always
+        // MemoryChunk::kAlignment so there is always
         // enough space for a fake MemoryChunk header.
+        inner->set_size(Page::kPageSize);
         inner->set_owner(lo_space());
         inner->SetFlag(MemoryChunk::ABOUT_TO_BE_FREED);
         inner = MemoryChunk::FromAddress(