8303969: Limit printed failures within an object during G1 heap verification

Reviewed-by: ayang, iwalulya

Author: Thomas Schatzl

src/hotspot/share/gc/g1/g1_globals.hpp

@@ -214,7 +214,8 @@
           range(1, 100)                                                     \
                                                                             \
   develop(size_t, G1MaxVerifyFailures, SIZE_MAX,                            \
-          "The maximum number of verification failures to print.")          \
+          "The maximum number of liveness and remembered set verification " \
+          "failures to print per thread.")                                  \
           range(1, SIZE_MAX)                                                \
                                                                             \
   product(uintx, G1ReservePercent, 10,                                      \

src/hotspot/share/gc/g1/heapRegion.cpp

@@ -619,6 +619,10 @@ class G1VerifyLiveAndRemSetClosure : public BasicOopIterateClosure {
     assert(_containing_obj != nullptr, "must be");
     assert(!G1CollectedHeap::heap()->is_obj_dead_cond(_containing_obj, _vo), "Precondition");
 
+    if (num_failures() >= G1MaxVerifyFailures) {
+      return;
+    }
+
     T heap_oop = RawAccess<>::oop_load(p);
     if (CompressedOops::is_null(heap_oop)) {
       return;