Disable ES6 tail call elimination for native functions.

src/parsing/parser-base.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PARSER_BASE_H
 #define V8_PARSING_PARSER_BASE_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/hashmap.h"
@@ skipping 90 matching lines @@
         fni_(NULL),
         ast_value_factory_(ast_value_factory),
         log_(log),
         mode_(PARSE_EAGERLY),  // Lazy mode must be set explicitly.
         stack_limit_(stack_limit),
         zone_(zone),
         scanner_(scanner),
         stack_overflow_(false),
         allow_lazy_(false),
         allow_natives_(false),
+        allow_tailcalls_(false),
         allow_harmony_sloppy_(false),
         allow_harmony_sloppy_function_(false),
         allow_harmony_sloppy_let_(false),
         allow_harmony_restrictive_declarations_(false),
         allow_legacy_const_(true),
         allow_harmony_do_expressions_(false),
         allow_harmony_function_name_(false),
         allow_harmony_function_sent_(false) {}
 
 #define ALLOW_ACCESSORS(name)                           \
   bool allow_##name() const { return allow_##name##_; } \
   void set_allow_##name(bool allow) { allow_##name##_ = allow; }
 
 #define SCANNER_ACCESSORS(name)                                  \
   bool allow_##name() const { return scanner_->allow_##name(); } \
   void set_allow_##name(bool allow) {                            \
     return scanner_->set_allow_##name(allow);                    \
   }
 
   ALLOW_ACCESSORS(lazy);
   ALLOW_ACCESSORS(natives);
+  ALLOW_ACCESSORS(tailcalls);
   ALLOW_ACCESSORS(harmony_sloppy);
   ALLOW_ACCESSORS(harmony_sloppy_function);
   ALLOW_ACCESSORS(harmony_sloppy_let);
   ALLOW_ACCESSORS(harmony_restrictive_declarations);
   ALLOW_ACCESSORS(legacy_const);
   ALLOW_ACCESSORS(harmony_do_expressions);
   ALLOW_ACCESSORS(harmony_function_name);
   ALLOW_ACCESSORS(harmony_function_sent);
   SCANNER_ACCESSORS(harmony_exponentiation_operator);
 #undef ALLOW_ACCESSORS
@@ skipping 769 matching lines @@
   uintptr_t stack_limit_;
 
  private:
   Zone* zone_;
 
   Scanner* scanner_;
   bool stack_overflow_;
 
   bool allow_lazy_;
   bool allow_natives_;
+  bool allow_tailcalls_;
   bool allow_harmony_sloppy_;
   bool allow_harmony_sloppy_function_;
   bool allow_harmony_sloppy_let_;
   bool allow_harmony_restrictive_declarations_;
   bool allow_legacy_const_;
   bool allow_harmony_do_expressions_;
   bool allow_harmony_function_name_;
   bool allow_harmony_function_sent_;
 };
 
@@ skipping 2180 matching lines @@
     has_seen_constructor_ = true;
     return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H