add new counter about GC.

* debug_counter.h: add `gc_major_oldmalloc`.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65362 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

debug_counter.h

@@ -119,6 +119,7 @@ RB_DEBUG_COUNTER(gc_major_nofree)
 RB_DEBUG_COUNTER(gc_major_oldgen)
 RB_DEBUG_COUNTER(gc_major_shady)
 RB_DEBUG_COUNTER(gc_major_force)
+RB_DEBUG_COUNTER(gc_major_oldmalloc)
 
 /* object allocation counts:
  *

gc.c

@@ -6538,11 +6538,15 @@ gc_start(rb_objspace_t *objspace, int reason)
 
 #if USE_DEBUG_COUNTER
     RB_DEBUG_COUNTER_INC(gc_count);
+
     if (reason & GPR_FLAG_MAJOR_MASK) {
         (void)RB_DEBUG_COUNTER_INC_IF(gc_major_nofree, reason & GPR_FLAG_MAJOR_BY_NOFREE);
         (void)RB_DEBUG_COUNTER_INC_IF(gc_major_oldgen, reason & GPR_FLAG_MAJOR_BY_OLDGEN);
         (void)RB_DEBUG_COUNTER_INC_IF(gc_major_shady,  reason & GPR_FLAG_MAJOR_BY_SHADY);
         (void)RB_DEBUG_COUNTER_INC_IF(gc_major_force,  reason & GPR_FLAG_MAJOR_BY_FORCE);
+#if RGENGC_ESTIMATE_OLDMALLOC
+        (void)RB_DEBUG_COUNTER_INC_IF(gc_major_oldmalloc, reason & GPR_FLAG_MAJOR_BY_OLDMALLOC);
+#endif
     }
     else {
         (void)RB_DEBUG_COUNTER_INC_IF(gc_minor_newobj, reason & GPR_FLAG_NEWOBJ);