Do not left-trim arrays when concurrent sweeping is active.

src/spaces.h

Index: src/spaces.h
diff --git a/src/spaces.h b/src/spaces.h
index 770b88a9fba85e8ae8c37bee3880a63cf56a6f84..71a7a2b934862edcba7c7c9e0b06b36b8dc312d1 100644
--- a/src/spaces.h
+++ b/src/spaces.h
@@ -475,6 +475,7 @@ class MemoryChunk {
   // sweeping must not be performed on that page.
   enum ParallelSweepingState {
     PARALLEL_SWEEPING_DONE,
+    PARALLEL_SWEEPING_FINALIZE,

[Michael Starzinger, 2014/03/24 12:21:35]

Please add a comment explaining the semantics of this new state above. Also
please leave a comment that the order of the constants is important because we
use them for range checks.

[Hannes Payer (out of office), 2014/03/25 11:41:08]

Done.

     PARALLEL_SWEEPING_IN_PROGRESS,
     PARALLEL_SWEEPING_PENDING
   };