[Interpreter] Enable tracing of bytecode handler dispatches.

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
index ea50faa02d882c91bee2cdd2912a2cd6e7486db7..7f624cc057f20af968e1803ada4e88d17c596094 100644
--- a/src/interpreter/interpreter.h
+++ b/src/interpreter/interpreter.h
@@ -53,6 +53,14 @@ class Interpreter {
     return reinterpret_cast<Address>(&dispatch_table_[0]);
   }
 
+  uintptr_t* handler_to_handler_dispatch_counters() {
+    return handler_to_handler_dispatch_counters_.get();
+  }
+
+  // Returns true if a handler is generated for a bytecode at a given
+  // operand scale.
+  static bool BytecodeHasHandler(Bytecode bytecode, OperandScale operand_scale);

[rmcilroy, 2016/04/08 11:24:44]

Remove

[Stefano Sanfilippo, 2016/04/08 14:42:44]

Done.

+
  private:
 // Bytecode handler generator functions.
 #define DECLARE_BYTECODE_HANDLER_GENERATOR(Name, ...) \
@@ -141,6 +149,7 @@ class Interpreter {
 
   Isolate* isolate_;
   Code* dispatch_table_[kDispatchTableSize];
+  v8::base::SmartArrayPointer<uintptr_t> handler_to_handler_dispatch_counters_;

[rmcilroy, 2016/04/08 11:24:44]

/s/handler_to_handler_dispatch_counters/bytecode_dispatch_count_table

[Stefano Sanfilippo, 2016/04/08 14:42:44]

Done.

 
   DISALLOW_COPY_AND_ASSIGN(Interpreter);
 };