[regexp] Add support for dotAll flag

src/bootstrapper.cc

 // Copyright 2014 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.
 
 #include "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 3848 matching lines @@
         handle(isolate()->builtins()->builtin(Builtins::kPromiseThrowerFinally),
                isolate());
     Handle<SharedFunctionInfo> info = factory()->NewSharedFunctionInfo(
         factory()->empty_string(), code, false);
     info->set_internal_formal_parameter_count(0);
     info->set_length(0);
     native_context()->set_promise_thrower_finally_shared_fun(*info);
   }
 }
 
+void Genesis::InitializeGlobal_harmony_regexp_dotall() {
+  if (!FLAG_harmony_regexp_dotall) return;
+
+  Handle<JSFunction> constructor(native_context()->regexp_function());
+  Handle<JSObject> prototype(JSObject::cast(constructor->instance_prototype()));
+
+  SimpleInstallGetter(prototype, isolate()->factory()->dotAll_string(),
+                      Builtins::kRegExpPrototypeDotAllGetter, true);
+
+  // The regexp prototype map has changed because we added a property
+  // to it, so we update the saved map.
+  Handle<Map> prototype_map(prototype->map());
+  Map::SetShouldBeFastPrototypeMap(prototype_map, true, isolate());
+  native_context()->set_regexp_prototype_map(*prototype_map);
+}
+
 #ifdef V8_I18N_SUPPORT
 void Genesis::InitializeGlobal_datetime_format_to_parts() {
   if (!FLAG_datetime_format_to_parts) return;
   Handle<JSReceiver> exports_container(
       JSReceiver::cast(native_context()->exports_container()));
   Handle<JSObject> date_time_format_prototype(JSObject::cast(
       native_context()->intl_date_time_format_function()->prototype()));
   Handle<JSFunction> format_date_to_parts = Handle<JSFunction>::cast(
       JSReceiver::GetProperty(
           exports_container,
@@ skipping 1227 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8