From 5a6b0e39a1913235d960fafb37b23a29317ccd11 Mon Sep 17 00:00:00 2001
From: k0kubun <k0kubun@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 6 Apr 2019 14:42:02 +0000
Subject: [PATCH] Add debug counter for VM <-> MJIT calls

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67460 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 debug_counter.h |  6 ++++++
 mjit.h          | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/debug_counter.h b/debug_counter.h
index f0de6d2cb6..b28efb3278 100644
--- a/debug_counter.h
+++ b/debug_counter.h
@@ -263,6 +263,12 @@ RB_DEBUG_COUNTER(mjit_exec_not_ready)
 RB_DEBUG_COUNTER(mjit_exec_not_compiled)
 RB_DEBUG_COUNTER(mjit_exec_call_func)
 
+/* MJIT <-> VM frame push counts */
+RB_DEBUG_COUNTER(mjit_frame_VM2VM)
+RB_DEBUG_COUNTER(mjit_frame_VM2JT)
+RB_DEBUG_COUNTER(mjit_frame_JT2JT)
+RB_DEBUG_COUNTER(mjit_frame_JT2VM)
+
 /* MJIT cancel counters */
 RB_DEBUG_COUNTER(mjit_cancel)
 RB_DEBUG_COUNTER(mjit_cancel_ivar)
diff --git a/mjit.h b/mjit.h
index 4b4d7cce47..6fb15b402c 100644
--- a/mjit.h
+++ b/mjit.h
@@ -110,6 +110,11 @@ mjit_exec(rb_execution_context_t *ec)
 
     func = body->jit_func;
     if (UNLIKELY((uintptr_t)func <= (uintptr_t)LAST_JIT_ISEQ_FUNC)) {
+#     ifdef MJIT_HEADER
+        RB_DEBUG_COUNTER_INC(mjit_frame_JT2VM);
+#     else
+        RB_DEBUG_COUNTER_INC(mjit_frame_VM2VM);
+#     endif
         switch ((enum rb_mjit_iseq_func)func) {
           case NOT_ADDED_JIT_ISEQ_FUNC:
             RB_DEBUG_COUNTER_INC(mjit_exec_not_added);
@@ -132,6 +137,11 @@ mjit_exec(rb_execution_context_t *ec)
         }
     }
 
+#   ifdef MJIT_HEADER
+      RB_DEBUG_COUNTER_INC(mjit_frame_JT2JT);
+#   else
+      RB_DEBUG_COUNTER_INC(mjit_frame_VM2JT);
+#   endif
     RB_DEBUG_COUNTER_INC(mjit_exec_call_func);
     return func(ec, ec->cfp);
 }