diff -r 6bd052801d02 -r 331ba84b1e36 src/hotspot/share/gc/g1/g1ConcurrentMark.hpp
--- a/src/hotspot/share/gc/g1/g1ConcurrentMark.hpp	Wed Jan 16 07:01:04 2019 -0500
+++ b/src/hotspot/share/gc/g1/g1ConcurrentMark.hpp	Wed Jan 09 19:05:05 2019 -0500
@@ -727,7 +727,11 @@
   // Supposed to be called regularly during a marking step as
   // it checks a bunch of conditions that might cause the marking step
   // to abort
-  void regular_clock_call();
+  // Return true if the marking step should continue. Otherwise, return false to abort
+  bool regular_clock_call();
+
+  // Set abort flag if regular_clock_call() check fails
+  inline void abort_marking_if_regular_check_fail();
 
   // Test whether obj might have already been passed over by the
   // mark bitmap scan, and so needs to be pushed onto the mark stack.