[heap] Perform slot set DCHECKs on all pages and not just old space

We can perform these DCHECKs on all pages, not just pages in old space.

Bug: v8:12760
Change-Id: I202e1a96190d305b86c69cd6616bdb5ecc812044
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3574560Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79847}

src/heap/mark-compact.cc

@@ -3511,13 +3511,17 @@ void MarkCompactCollector::EvacuateEpilogue() {
   heap()->memory_allocator()->unmapper()->FreeQueuedChunks();
 
 #ifdef DEBUG
-  // Old-to-old slot sets must be empty after evacuation.
-  for (Page* p : *heap()->old_space()) {
-    DCHECK_NULL((p->slot_set<OLD_TO_OLD, AccessMode::ATOMIC>()));
-    DCHECK_NULL((p->slot_set<OLD_TO_SHARED, AccessMode::NON_ATOMIC>()));
-    DCHECK_NULL((p->typed_slot_set<OLD_TO_OLD, AccessMode::ATOMIC>()));
-    DCHECK_NULL(p->invalidated_slots<OLD_TO_OLD>());
-    DCHECK_NULL(p->invalidated_slots<OLD_TO_NEW>());
+  MemoryChunkIterator chunk_iterator(heap());
+
+  while (chunk_iterator.HasNext()) {
+    MemoryChunk* chunk = chunk_iterator.Next();
+
+    // Old-to-old slot sets must be empty after evacuation.
+    DCHECK_NULL((chunk->slot_set<OLD_TO_OLD, AccessMode::ATOMIC>()));
+    DCHECK_NULL((chunk->slot_set<OLD_TO_SHARED, AccessMode::NON_ATOMIC>()));
+    DCHECK_NULL((chunk->typed_slot_set<OLD_TO_OLD, AccessMode::ATOMIC>()));
+    DCHECK_NULL(chunk->invalidated_slots<OLD_TO_OLD>());
+    DCHECK_NULL(chunk->invalidated_slots<OLD_TO_NEW>());
   }
 #endif
 }