[heap] Check that sweeping is completed when collecting evacuation

src/heap/mark-compact.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/mark-compact.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/base/sys-info.h"
 #include "src/code-stubs.h"
@@ skipping 620 matching lines @@
   DCHECK(space->identity() == OLD_SPACE || space->identity() == CODE_SPACE);
 
   int number_of_pages = space->CountTotalPages();
   size_t area_size = space->AreaSize();
 
   // Pairs of (live_bytes_in_page, page).
   typedef std::pair<size_t, Page*> LiveBytesPagePair;
   std::vector<LiveBytesPagePair> pages;
   pages.reserve(number_of_pages);
 
+  DCHECK(!sweeping_in_progress());
+  DCHECK(!FLAG_concurrent_sweeping ||
+         sweeper().IsSweepingCompleted(space->identity()));
   for (Page* p : *space) {
     if (p->NeverEvacuate()) continue;
     // Invariant: Evacuation candidates are just created when marking is
     // started. This means that sweeping has finished. Furthermore, at the end
     // of a GC all evacuation candidates are cleared and their slot buffers are
     // released.
     CHECK(!p->IsEvacuationCandidate());
     CHECK_NULL(p->old_to_old_slots());
     CHECK_NULL(p->typed_old_to_old_slots());
     CHECK(p->SweepingDone());
@@ skipping 3261 matching lines @@
       // The target is always in old space, we don't have to record the slot in
       // the old-to-new remembered set.
       DCHECK(!heap()->InNewSpace(target));
       RecordRelocSlot(host, &rinfo, target);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8