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

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index 59d8cfb6d9ed6d9d7c06d8e9d58689cb2950437e..f51129625dc68f76bf6f3dc002a1676af85f4e0b 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -450,6 +450,11 @@ class MemoryChunk {
     //   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,