Wait for concurrent unmapping tasks in GC prologue.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index a529080a5229af5ac6e3e72db2c71b597df6f127..273ccebaa1a18bf48872fc82b4f89ef202f87a20 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -2376,7 +2376,9 @@ class Heap {
 
   MemoryChunk* chunks_queued_for_free_;
 
-  base::Semaphore pending_unmap_job_semaphore_;
+  unsigned int concurrent_unmaping_tasks_active_;

[Michael Lippautz, 2015/08/27 11:37:41]

size_t maybe?

[Hannes Payer (out of office), 2015/08/27 12:34:37]

Done.

+
+  base::Semaphore pending_unmap_tasks_semaphore_;
 
   base::Mutex relocation_mutex_;