- Fine grain locking of free list when sweeping concurrently.

runtime/vm/gc_sweeper.h

Index: runtime/vm/gc_sweeper.h
===================================================================
--- runtime/vm/gc_sweeper.h	(revision 41045)
+++ runtime/vm/gc_sweeper.h	(working copy)
@@ -26,7 +26,7 @@
   // Sweep the memory area for the page while clearing the mark bits and adding
   // all the unmarked objects to the pre-locked freelist.

[koda, 2014/10/10 18:38:01]

Update comment.

Also clarify that when page is unused, freelist is not touched.

[Ivan Posva, 2014/10/10 20:47:41]

Done.

   // Returns true if the page is in use.
-  bool SweepPage(HeapPage* page, FreeList* freelist);
+  bool SweepPage(HeapPage* page, FreeList* freelist, bool locked);
 
   // Returns the number of words from page->object_start() to the end of the
   // last marked object.