[heap] Concurrency support for heap book-keeping info

src/heap/spaces.cc

 // Copyright 2011 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/spaces.h"
 
 #include "src/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/heap/mark-compact.h"
@@ skipping 475 matching lines @@
   chunk->size_ = size;
   chunk->area_start_ = area_start;
   chunk->area_end_ = area_end;
   chunk->flags_ = 0;
   chunk->set_owner(owner);
   chunk->InitializeReservedMemory();
   chunk->slots_buffer_ = NULL;
   chunk->skip_list_ = NULL;
   chunk->write_barrier_counter_ = kWriteBarrierCounterGranularity;
   chunk->progress_bar_ = 0;
-  chunk->high_water_mark_ = static_cast<int>(area_start - base);
+  chunk->high_water_mark_.SetValue(static_cast<intptr_t>(area_start - base));
   chunk->set_parallel_sweeping(SWEEPING_DONE);
   chunk->mutex_ = NULL;
   chunk->available_in_small_free_list_ = 0;
   chunk->available_in_medium_free_list_ = 0;
   chunk->available_in_large_free_list_ = 0;
   chunk->available_in_huge_free_list_ = 0;
   chunk->non_available_small_blocks_ = 0;
   chunk->ResetLiveBytes();
   Bitmap::Clear(chunk);
   chunk->initialize_scan_on_scavenge(false);
@@ skipping 2678 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8