From cc50ed4a5044133ef1ef79d31aa7d850bf3ca83b Mon Sep 17 00:00:00 2001
From: ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 31 May 2017 06:46:57 +0000
Subject: [PATCH] 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.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58977 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 debug_counter.h | 10 ++++++++++
 insns.def       |  4 ++++
 vm_insnhelper.c |  1 +
 3 files changed, 15 insertions(+)

diff --git a/debug_counter.h b/debug_counter.h
index 250d0a568d..724dc3a257 100644
--- a/debug_counter.h
+++ b/debug_counter.h
@@ -13,6 +13,8 @@
 #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)
 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_noobject)
 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)
 
diff --git a/insns.def b/insns.def
index fa82d80850..84bfd822da 100644
--- a/insns.def
+++ b/insns.def
@@ -58,6 +58,8 @@ getlocal
 (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
 ()
 {
     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);
 }
 
 /**
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 777ba840f4..a6f2943ecd 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -320,6 +320,7 @@ vm_env_write_slowpath(const VALUE *ep, int index, VALUE v)
     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