[heap] Rename CreateFillerObjectFromSweeper

Rename CreateFillerObjectFromSweeper to CreateFillerObjectAtBackground.
Also use CreateFillerObjectAtBackground in PagedSpace::Free since this
is used from both main and background threads.

Bug: v8:10315
Change-Id: I1dc8ca2b1c81bdfd192c0ae8d8547eb577f3f8c3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2235534
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68255}

src/heap/concurrent-allocator.cc

@@ -26,12 +26,13 @@ void StressConcurrentAllocatorTask::RunInternal() {
     Address address = allocator->AllocateOrFail(
         kObjectSize, AllocationAlignment::kWordAligned,
         AllocationOrigin::kRuntime);
-    heap->CreateFillerObjectAt(address, kObjectSize, ClearRecordedSlots::kNo);
+    heap->CreateFillerObjectAtBackground(
+        address, kObjectSize, ClearFreedMemoryMode::kDontClearFreedMemory);
     address = allocator->AllocateOrFail(kLargeObjectSize,
                                         AllocationAlignment::kWordAligned,
                                         AllocationOrigin::kRuntime);
-    heap->CreateFillerObjectAt(address, kLargeObjectSize,
-                               ClearRecordedSlots::kNo);
+    heap->CreateFillerObjectAtBackground(
+        address, kLargeObjectSize, ClearFreedMemoryMode::kDontClearFreedMemory);
     if (i % 10 == 0) {
       local_heap.Safepoint();
     }

src/heap/heap.cc

@@ -3044,7 +3044,7 @@ HeapObject Heap::CreateFillerObjectAt(ReadOnlyRoots roots, Address addr,
   return filler;
 }
 
-void Heap::CreateFillerObjectFromSweeper(
+void Heap::CreateFillerObjectAtBackground(
     Address addr, int size, ClearFreedMemoryMode clear_memory_mode) {
   CreateFillerObjectAtImpl(ReadOnlyRoots(this), addr, size, clear_memory_mode);
   // Do not verify whether slots are cleared here: the concurrent sweeper is not

src/heap/heap.h

@@ -475,8 +475,8 @@ class Heap {
   V8_EXPORT_PRIVATE HeapObject CreateFillerObjectAt(
       Address addr, int size, ClearRecordedSlots clear_slots_mode);
 
-  void CreateFillerObjectFromSweeper(Address addr, int size,
-                                     ClearFreedMemoryMode clear_memory_mode);
+  void CreateFillerObjectAtBackground(Address addr, int size,
+                                      ClearFreedMemoryMode clear_memory_mode);
 
   template <typename T>
   void CreateFillerForArray(T object, int elements_to_trim, int bytes_to_trim);

src/heap/paged-spaces.h

@@ -156,8 +156,9 @@ class V8_EXPORT_PRIVATE PagedSpace
 
   size_t Free(Address start, size_t size_in_bytes, SpaceAccountingMode mode) {
     if (size_in_bytes == 0) return 0;
-    heap()->CreateFillerObjectAt(start, static_cast<int>(size_in_bytes),
-                                 ClearRecordedSlots::kNo);
+    heap()->CreateFillerObjectAtBackground(
+        start, static_cast<int>(size_in_bytes),
+        ClearFreedMemoryMode::kDontClearFreedMemory);
     if (mode == SpaceAccountingMode::kSpaceAccounted) {
       return AccountedFree(start, size_in_bytes);
     } else {

src/heap/sweeper.cc

@@ -269,7 +269,7 @@ V8_INLINE size_t Sweeper::FreeAndProcessFreedMemory(
       (free_list_mode == REBUILD_FREE_LIST)
           ? ClearFreedMemoryMode::kDontClearFreedMemory
           : ClearFreedMemoryMode::kClearFreedMemory;
-  page->heap()->CreateFillerObjectFromSweeper(
+  page->heap()->CreateFillerObjectAtBackground(
       free_start, static_cast<int>(size), clear_memory_mode);
   if (free_list_mode == REBUILD_FREE_LIST) {
     freed_bytes =