ko1	2017-05-31 15:46:57 +0900 (Wed, 31 May 2017)

  New Revision: 58977

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=58977

  Log:
    add debug counters for local variable (lavr) access.
    
    * debug_counter.h: add the following counters:
      * lvar_get: counter for lvar get.
      * lvar_get_dynamic: counter for lvar get from upper frames.
      * lvar_set: coutner for lvar set.
      * lvar_set_dynamic: coutner for lvar set from upper frames.
      * lvar_set_slowpath: counter for lavr set using slowpath.

  Modified files:
    trunk/debug_counter.h
    trunk/insns.def
    trunk/vm_insnhelper.c
Index: debug_counter.h
===================================================================
--- debug_counter.h	(revision 58976)
+++ debug_counter.h	(revision 58977)
@@ -13,6 +13,8 @@ https://github.com/ruby/ruby/blob/trunk/debug_counter.h#L13
 #endif
 
 #ifdef RB_DEBUG_COUNTER
+
+/* method search */
 RB_DEBUG_COUNTER(mc_inline_hit)
 RB_DEBUG_COUNTER(mc_inline_miss)
 RB_DEBUG_COUNTER(mc_global_hit)
@@ -23,6 +25,7 @@ RB_DEBUG_COUNTER(mc_cme_complement) https://github.com/ruby/ruby/blob/trunk/debug_counter.h#L25
 RB_DEBUG_COUNTER(mc_cme_complement_hit)
 RB_DEBUG_COUNTER(mc_search_super)
 
+/* ivar access */
 RB_DEBUG_COUNTER(ivar_get_ic_hit)
 RB_DEBUG_COUNTER(ivar_get_ic_miss)
 RB_DEBUG_COUNTER(ivar_get_ic_miss_serial)
@@ -37,6 +40,13 @@ RB_DEBUG_COUNTER(ivar_set_ic_miss_noobje https://github.com/ruby/ruby/blob/trunk/debug_counter.h#L40
 RB_DEBUG_COUNTER(ivar_get_base)
 RB_DEBUG_COUNTER(ivar_set_base)
 
+/* lvar access */
+RB_DEBUG_COUNTER(lvar_get)
+RB_DEBUG_COUNTER(lvar_get_dynamic)
+RB_DEBUG_COUNTER(lvar_set)
+RB_DEBUG_COUNTER(lvar_set_dynamic)
+RB_DEBUG_COUNTER(lvar_set_slowpath)
+
 /* object counts */
 RB_DEBUG_COUNTER(obj_free)
 
Index: vm_insnhelper.c
===================================================================
--- vm_insnhelper.c	(revision 58976)
+++ vm_insnhelper.c	(revision 58977)
@@ -320,6 +320,7 @@ vm_env_write_slowpath(const VALUE *ep, i https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L320
     rb_gc_writebarrier_remember(VM_ENV_ENVVAL(ep));
     VM_FORCE_WRITE(&ep[index], v);
     VM_ENV_FLAGS_UNSET(ep, VM_ENV_FLAG_WB_REQUIRED);
+    RB_DEBUG_COUNTER_INC(lvar_set_slowpath);
 }
 
 static inline void
Index: insns.def
===================================================================
--- insns.def	(revision 58976)
+++ insns.def	(revision 58977)
@@ -58,6 +58,8 @@ getlocal https://github.com/ruby/ruby/blob/trunk/insns.def#L58
 (VALUE val)
 {
     val = *(vm_get_ep(GET_EP(), level) - idx);
+    RB_DEBUG_COUNTER_INC(lvar_get);
+    (void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
 }
 
 /**
@@ -74,6 +76,8 @@ setlocal https://github.com/ruby/ruby/blob/trunk/insns.def#L76
 ()
 {
     vm_env_write(vm_get_ep(GET_EP(), level), -(int)idx, val);
+    RB_DEBUG_COUNTER_INC(lvar_set);
+    (void)RB_DEBUG_COUNTER_INC_IF(lvar_set_dynamic, level > 0);
 }
 
 /**

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