1 files changed, 67 insertions, 0 deletions
diff --git a/debug_counter.h b/debug_counter.h
new file mode 100644
index 0000000000..e16d5fae4a
--- /dev/null
+++ b/debug_counter.h
@@ -0,0 +1,67 @@
+/**********************************************************************
+
+  debug_counter.h -
+
+  created at: Tue Feb 21 16:51:18 2017
+
+  Copyright (C) 2017 Koichi Sasada
+
+**********************************************************************/
+
+#ifndef RUBY_DEBUG_COUNTER_H
+#define RUBY_DEBUG_COUNTER_H 1
+
+#ifndef USE_DEBUG_COUNTER
+#define USE_DEBUG_COUNTER 0
+#endif
+
+#if !defined(__GNUC__) && USE_DEBUG_COUNTER
+#error "USE_DEBUG_COUNTER is not supported by other than __GNUC__"
+#endif
+
+enum rb_debug_counter_type {
+#define COUNTER(name) RB_DEBUG_COUNTER_##name
+    COUNTER(mc_inline_hit),
+    COUNTER(mc_inline_miss),
+    COUNTER(mc_global_hit),
+    COUNTER(mc_global_miss),
+    COUNTER(mc_global_state_miss),
+    COUNTER(mc_class_serial_miss),
+    COUNTER(mc_cme_complement),
+    COUNTER(mc_cme_complement_hit),
+    COUNTER(mc_search_super),
+    COUNTER(ivar_get_hit),
+    COUNTER(ivar_get_miss),
+    COUNTER(ivar_set_hit),
+    COUNTER(ivar_set_miss),
+    COUNTER(ivar_get),
+    COUNTER(ivar_set),
+    RB_DEBUG_COUNTER_MAX
+#undef COUNTER
+};
+
+#if USE_DEBUG_COUNTER
+#include "ruby/ruby.h"
+
+extern size_t rb_debug_counter[RB_DEBUG_COUNTER_MAX + 1];
+
+inline static int
+rb_debug_counter_add(enum rb_debug_counter_type type, int add, int cond)
+{
+    if (cond) {
+	rb_debug_counter[(int)type] += add;
+    }
+    return cond;
+}
+
+#define RB_DEBUG_COUNTER_INC(type)                rb_debug_counter_add(RB_DEBUG_COUNTER_##type, 1, 1)
+#define RB_DEBUG_COUNTER_INC_UNLESS(type, cond) (!rb_debug_counter_add(RB_DEBUG_COUNTER_##type, 1, !(cond)))
+#define RB_DEBUG_COUNTER_INC_IF(type, cond)       rb_debug_counter_add(RB_DEBUG_COUNTER_##type, 1, (cond))
+
+#else
+#define RB_DEBUG_COUNTER_INC(type)              ((void)0)
+#define RB_DEBUG_COUNTER_INC_UNLESS(type, cond) (cond)
+#define RB_DEBUG_COUNTER_INC_IF(type, cond)     (cond)
+#endif
+
+#endif /* RUBY_DEBUG_COUNTER_H */