[Interpreter] Enable tracing of bytecode handler dispatches.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 891 matching lines @@
   explicit ExternalReference(const SCTableReference& table_ref);
 
   // Isolate as an external reference.
   static ExternalReference isolate_address(Isolate* isolate);
 
   // One-of-a-kind references. These references are not part of a general
   // pattern. This means that they have to be added to the
   // ExternalReferenceTable in serialize.cc manually.
 
   static ExternalReference interpreter_dispatch_table_address(Isolate* isolate);
+  static ExternalReference interpreter_handler_to_handler_dispatch_counters(

[rmcilroy, 2016/04/08 11:24:43]

interpreter_dispatch_counters should be fine (throughout)

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

Done.

+      Isolate* isolate);
 
   static ExternalReference incremental_marking_record_write_function(
       Isolate* isolate);
   static ExternalReference incremental_marking_record_write_code_entry_function(
       Isolate* isolate);
   static ExternalReference store_buffer_overflow_function(
       Isolate* isolate);
   static ExternalReference delete_handle_scope_extensions(Isolate* isolate);
 
   static ExternalReference get_date_field_function(Isolate* isolate);
@@ skipping 397 matching lines @@
     std::vector<ConstantPoolEntry> shared_entries;
   };
 
   Label emitted_label_;  // Records pc_offset of emitted pool
   PerTypeEntryInfo info_[ConstantPoolEntry::NUMBER_OF_TYPES];
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_ASSEMBLER_H_