[module] Track script "module code" status

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 6438 matching lines @@
   // function source. Encoded in the 'flags' field.
   inline bool hide_source();
   inline void set_hide_source(bool value);
 
   // [origin_options]: optional attributes set by the embedder via ScriptOrigin,
   // and used by the embedder to make decisions about the script. V8 just passes
   // this through. Encoded in the 'flags' field.
   inline v8::ScriptOriginOptions origin_options();
   inline void set_origin_options(ScriptOriginOptions origin_options);
 
+  // [is_module]: determines whether the script is an ES2015 module. Encoded in
+  // the 'flags' field.
+  inline bool is_module();
+  inline void set_is_module(bool value);
+
   DECLARE_CAST(Script)
 
   // If script source is an external string, check that the underlying
   // resource is accessible. Otherwise, always return true.
   inline bool HasValidSource();
 
   static Handle<Object> GetNameOrSourceURL(Handle<Script> script);
 
   // Set eval origin for stack trace formatting.
   static void SetEvalOrigin(Handle<Script> script,
@@ skipping 77 matching lines @@
   int GetLineNumberWithArray(int code_pos);
 
   // Bit positions in the flags field.
   static const int kCompilationTypeBit = 0;
   static const int kCompilationStateBit = 1;
   static const int kHideSourceBit = 2;
   static const int kOriginOptionsShift = 3;
   static const int kOriginOptionsSize = 3;
   static const int kOriginOptionsMask = ((1 << kOriginOptionsSize) - 1)
                                         << kOriginOptionsShift;
+  static const int kIsModuleBit = kOriginOptionsShift + kOriginOptionsSize;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Script);
 };
 
 
 // List of builtin functions we want to identify to improve code
 // generation.
 //
 // Each entry has a name of a global object property holding an object
 // optionally followed by ".prototype", a name of a builtin function
@@ skipping 1532 matching lines @@
 // is called while such a hash is live in the cache, the hash gets replaced by
 // an actual cache entry. Age also removes stale live entries from the cache.
 // Such entries are identified by SharedFunctionInfos pointing to either the
 // recompilation stub, or to "old" code. This avoids memory leaks due to
 // premature caching of scripts and eval strings that are never needed later.
 class CompilationCacheTable: public HashTable<CompilationCacheTable,
                                               CompilationCacheShape,
                                               HashTableKey*> {
  public:
   // Find cached value for a string key, otherwise return null.
-  Handle<Object> Lookup(
-      Handle<String> src, Handle<Context> context, LanguageMode language_mode);
+  Handle<Object> Lookup(Handle<String> src, Handle<Context> context,
+                        LanguageMode language_mode, bool is_module);
   Handle<Object> LookupEval(
       Handle<String> src, Handle<SharedFunctionInfo> shared,
       LanguageMode language_mode, int scope_position);
   Handle<Object> LookupRegExp(Handle<String> source, JSRegExp::Flags flags);
-  static Handle<CompilationCacheTable> Put(
-      Handle<CompilationCacheTable> cache, Handle<String> src,
-      Handle<Context> context, LanguageMode language_mode,
-      Handle<Object> value);
+  static Handle<CompilationCacheTable> Put(Handle<CompilationCacheTable> cache,
+                                           Handle<String> src,
+                                           Handle<Context> context,
+                                           LanguageMode language_mode,
+                                           bool is_module,
+                                           Handle<Object> value);
   static Handle<CompilationCacheTable> PutEval(
       Handle<CompilationCacheTable> cache, Handle<String> src,
       Handle<SharedFunctionInfo> context, Handle<SharedFunctionInfo> value,
       int scope_position);
   static Handle<CompilationCacheTable> PutRegExp(
       Handle<CompilationCacheTable> cache, Handle<String> src,
       JSRegExp::Flags flags, Handle<FixedArray> value);
   void Remove(Object* value);
   void Age();
   static const int kHashGenerations = 10;
@@ skipping 2678 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_