Move public symbols to the root set.

src/heap/heap.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_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 
 #include "src/allocation.h"
@@ skipping 281 matching lines @@
   V(normal_ic_symbol)               \
   V(home_object_symbol)             \
   V(intl_initialized_marker_symbol) \
   V(intl_impl_object_symbol)        \
   V(promise_debug_marker_symbol)    \
   V(promise_has_handler_symbol)     \
   V(class_script_symbol)            \
   V(class_start_position_symbol)    \
   V(class_end_position_symbol)
 
+#define PUBLIC_SYMBOL_LIST(V)                                    \
+  V(has_instance_symbol, symbolHasInstance, Symbol.hasInstance)  \
+  V(is_concat_spreadable_symbol, symbolIsConcatSpreadable,       \
+    Symbol.isConcatSpreadable)                                   \
+  V(is_regexp_symbol, symbolIsRegExp, Symbol.isRegExp)           \
+  V(iterator_symbol, symbolIterator, Symbol.iterator)            \
+  V(to_string_tag_symbol, symbolToStringTag, Symbol.toStringTag) \
+  V(unscopables_symbol, symbolUnscopables, Symbol.unscopables)
+
 // Heap roots that are known to be immortal immovable, for which we can safely
 // skip write barriers. This list is not complete and has omissions.
 #define IMMORTAL_IMMOVABLE_ROOT_LIST(V) \
   V(ByteArrayMap)                       \
   V(FreeSpaceMap)                       \
   V(OnePointerFillerMap)                \
   V(TwoPointerFillerMap)                \
   V(UndefinedValue)                     \
   V(TheHoleValue)                       \
   V(NullValue)                          \
@@ skipping 490 matching lines @@
 #define STRING_ACCESSOR(name, str) \
   String* name() { return String::cast(roots_[k##name##RootIndex]); }
   INTERNALIZED_STRING_LIST(STRING_ACCESSOR)
 #undef STRING_ACCESSOR
 
 #define SYMBOL_ACCESSOR(name) \
   Symbol* name() { return Symbol::cast(roots_[k##name##RootIndex]); }
   PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR)
 #undef SYMBOL_ACCESSOR
 
+#define SYMBOL_ACCESSOR(name, varname, description) \
+  Symbol* name() { return Symbol::cast(roots_[k##name##RootIndex]); }
+  PUBLIC_SYMBOL_LIST(SYMBOL_ACCESSOR)
+#undef SYMBOL_ACCESSOR
+
   // The hidden_string is special because it is the empty string, but does
   // not match the empty string.
   String* hidden_string() { return hidden_string_; }
 
   void set_native_contexts_list(Object* object) {
     native_contexts_list_ = object;
   }
   Object* native_contexts_list() const { return native_contexts_list_; }
 
   void set_array_buffers_list(Object* object) { array_buffers_list_ = object; }
@@ skipping 277 matching lines @@
 #undef ROOT_INDEX_DECLARATION
 
 #define STRING_INDEX_DECLARATION(name, str) k##name##RootIndex,
     INTERNALIZED_STRING_LIST(STRING_INDEX_DECLARATION)
 #undef STRING_DECLARATION
 
 #define SYMBOL_INDEX_DECLARATION(name) k##name##RootIndex,
     PRIVATE_SYMBOL_LIST(SYMBOL_INDEX_DECLARATION)
 #undef SYMBOL_INDEX_DECLARATION
 
+#define SYMBOL_INDEX_DECLARATION(name, varname, description) k##name##RootIndex,
+    PUBLIC_SYMBOL_LIST(SYMBOL_INDEX_DECLARATION)
+#undef SYMBOL_INDEX_DECLARATION
+
 // Utility type maps
 #define DECLARE_STRUCT_MAP(NAME, Name, name) k##Name##MapRootIndex,
     STRUCT_LIST(DECLARE_STRUCT_MAP)
 #undef DECLARE_STRUCT_MAP
     kStringTableRootIndex,
 
 #define ROOT_INDEX_DECLARATION(type, name, camel_name) k##camel_name##RootIndex,
     SMI_ROOT_LIST(ROOT_INDEX_DECLARATION)
 #undef ROOT_INDEX_DECLARATION
     kRootListLength,
@@ skipping 1435 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_H_