[heap] Simulate aborting compaction during --stress-compaction

src/heap/spaces.h

 // 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.
 
 #ifndef V8_HEAP_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include <list>
 
 #include "src/allocation.h"
@@ skipping 432 matching lines @@
     PRE_FREED,
 
     // |POOLED|: When actually freeing this chunk, only uncommit and do not
     // give up the reservation as we still reuse the chunk at some point.
     POOLED,
 
     // |COMPACTION_WAS_ABORTED|: Indicates that the compaction in this page
     //   has been aborted and needs special handling by the sweeper.
     COMPACTION_WAS_ABORTED,
 
+    // |COMPACTION_WAS_ABORTED_FOR_TESTING|: During stress testing evacuation
+    // on pages is sometimes aborted. The flag is used to avoid repeatedly
+    // triggering on the same page.
+    COMPACTION_WAS_ABORTED_FOR_TESTING,
+
     // |ANCHOR|: Flag is set if page is an anchor.
     ANCHOR,
 
     // Last flag, keep at bottom.
     NUM_MEMORY_CHUNK_FLAGS
   };
 
   // |kSweepingDone|: The page state when sweeping is complete or sweeping must
   //   not be performed on that page. Sweeper threads that are done with their
   //   work will set this value and not touch the page anymore.
@@ skipping 2693 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_H_