WIP SharedArrayBuffer implementation

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/utils/random-number-generator.h"
 #include "src/code-stubs.h"
@@ skipping 204 matching lines @@
   HARMONY_INPROGRESS(DECLARE_FEATURE_INITIALIZATION)
   HARMONY_STAGED(DECLARE_FEATURE_INITIALIZATION)
   HARMONY_SHIPPING(DECLARE_FEATURE_INITIALIZATION)
 #undef DECLARE_FEATURE_INITIALIZATION
 
   Handle<JSFunction> InstallInternalArray(Handle<JSObject> target,
                                           const char* name,
                                           ElementsKind elements_kind);
   bool InstallNatives();
 
-  void InstallTypedArray(
-      const char* name,
-      ElementsKind elements_kind,
-      Handle<JSFunction>* fun,
-      Handle<Map>* external_map);
+  void InstallTypedArray(const char* name, ElementsKind elements_kind,
+                         Handle<JSFunction>* fun, Handle<Map>* external_map,
+                         SharedFlag is_shared);
   bool InstallExperimentalNatives();
   bool InstallExtraNatives();
   void InstallBuiltinFunctionIds();
   void InstallJSFunctionResultCaches();
   void InitializeNormalizedMapCaches();
 
   enum ExtensionTraversalState {
     UNVISITED, VISITED, INSTALLED
   };
 
@@ skipping 939 matching lines @@
         InstallFunction(
             global, "ArrayBuffer", JS_ARRAY_BUFFER_TYPE,
             JSArrayBuffer::kSizeWithInternalFields,
             isolate->initial_object_prototype(),
             Builtins::kIllegal);
     native_context()->set_array_buffer_fun(*array_buffer_fun);
     native_context()->set_array_buffer_map(array_buffer_fun->initial_map());
   }
 
   {  // -- T y p e d A r r a y s
-#define INSTALL_TYPED_ARRAY(Type, type, TYPE, ctype, size)                    \
-    {                                                                         \
-      Handle<JSFunction> fun;                                                 \
-      Handle<Map> external_map;                                               \
-      InstallTypedArray(#Type "Array",                                        \
-          TYPE##_ELEMENTS,                                                    \
-          &fun,                                                               \
-          &external_map);                                                     \
-      native_context()->set_##type##_array_fun(*fun);                         \
-      native_context()->set_##type##_array_external_map(*external_map);       \
-    }
+#define INSTALL_TYPED_ARRAY(Type, type, TYPE, ctype, size)                 \
+  {                                                                        \
+    Handle<JSFunction> fun;                                                \
+    Handle<Map> external_map;                                              \
+    InstallTypedArray(#Type "Array", TYPE##_ELEMENTS, &fun, &external_map, \
+                      NOT_SHARED);                                         \
+    native_context()->set_##type##_array_fun(*fun);                        \
+    native_context()->set_##type##_array_external_map(*external_map);      \
+  }
     TYPED_ARRAYS(INSTALL_TYPED_ARRAY)
 #undef INSTALL_TYPED_ARRAY
 
     Handle<JSFunction> data_view_fun =
         InstallFunction(
             global, "DataView", JS_DATA_VIEW_TYPE,
             JSDataView::kSizeWithInternalFields,
             isolate->initial_object_prototype(),
             Builtins::kIllegal);
     native_context()->set_data_view_fun(*data_view_fun);
@@ skipping 187 matching lines @@
     native_context()->set_call_as_constructor_delegate(*delegate);
     delegate->shared()->DontAdaptArguments();
   }
 
   // Initialize the embedder data slot.
   Handle<FixedArray> embedder_data = factory->NewFixedArray(3);
   native_context()->set_embedder_data(*embedder_data);
 }
 
 
-void Genesis::InstallTypedArray(
-    const char* name,
-    ElementsKind elements_kind,
-    Handle<JSFunction>* fun,
-    Handle<Map>* external_map) {
+void Genesis::InstallTypedArray(const char* name, ElementsKind elements_kind,
+                                Handle<JSFunction>* fun,
+                                Handle<Map>* external_map,
+                                SharedFlag is_shared) {
+  DCHECK(is_shared == NOT_SHARED || FLAG_harmony_shared_typed_arrays);
+  InstanceType type =
+      is_shared == SHARED ? JS_SHARED_TYPED_ARRAY_TYPE : JS_TYPED_ARRAY_TYPE;
   Handle<JSObject> global = Handle<JSObject>(native_context()->global_object());
   Handle<JSFunction> result = InstallFunction(
-      global, name, JS_TYPED_ARRAY_TYPE, JSTypedArray::kSize,
+      global, name, type, JSTypedArray::kSize,
       isolate()->initial_object_prototype(), Builtins::kIllegal);
 
   Handle<Map> initial_map = isolate()->factory()->NewMap(
-      JS_TYPED_ARRAY_TYPE,
-      JSTypedArray::kSizeWithInternalFields,
-      elements_kind);
+      type, JSTypedArray::kSizeWithInternalFields, elements_kind);
   JSFunction::SetInitialMap(result, initial_map,
                             handle(initial_map->prototype(), isolate()));
   *fun = result;
 
   ElementsKind external_kind = GetNextTransitionElementsKind(elements_kind);
   *external_map = Map::AsElementsKind(initial_map, external_kind);
 }
 
 
 void Genesis::InitializeExperimentalGlobal() {
@@ skipping 290 matching lines @@
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_tostring)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_sloppy)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_unicode)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_unicode_regexps)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_computed_property_names)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_rest_parameters)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_reflect)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_spreadcalls)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_destructuring)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_object)
+EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_shared_typed_arrays)
 
 
 void Genesis::InstallNativeFunctions_harmony_proxies() {
   if (FLAG_harmony_proxies) {
     INSTALL_NATIVE(JSFunction, "$proxyDerivedHasTrap", derived_has_trap);
     INSTALL_NATIVE(JSFunction, "$proxyDerivedGetTrap", derived_get_trap);
     INSTALL_NATIVE(JSFunction, "$proxyDerivedSetTrap", derived_set_trap);
     INSTALL_NATIVE(JSFunction, "$proxyEnumerate", proxy_enumerate);
   }
 }
@@ skipping 72 matching lines @@
   Handle<JSObject> builtins(native_context()->builtins());
 
   Handle<HeapObject> flag(FLAG_harmony_tostring ? heap()->true_value()
                                                 : heap()->false_value());
   Runtime::SetObjectProperty(isolate(), builtins,
                              factory()->harmony_tostring_string(), flag,
                              STRICT).Assert();
 }
 
 
+void Genesis::InitializeGlobal_harmony_shared_typed_arrays() {
+  if (!FLAG_harmony_shared_typed_arrays) return;
+
+  Handle<JSGlobalObject> global(
+      JSGlobalObject::cast(native_context()->global_object()));
+
+  Handle<JSFunction> shared_array_buffer_fun = InstallFunction(
+      global, "SharedArrayBuffer", JS_SHARED_ARRAY_BUFFER_TYPE,
+      JSArrayBuffer::kSizeWithInternalFields,
+      isolate()->initial_object_prototype(), Builtins::kIllegal);
+  native_context()->set_shared_array_buffer_fun(*shared_array_buffer_fun);
+
+#define INSTALL_SHARED_TYPED_ARRAY(Type, type, TYPE, ctype, size)            \
+  {                                                                          \
+    Handle<JSFunction> fun;                                                  \
+    Handle<Map> external_map;                                                \
+    InstallTypedArray("Shared" #Type "Array", TYPE##_ELEMENTS, &fun,         \
+                      &external_map, SHARED);                                \
+    native_context()->set_shared_##type##_array_fun(*fun);                   \
+    native_context()->set_shared_##type##_array_external_map(*external_map); \
+  }
+  TYPED_ARRAYS(INSTALL_SHARED_TYPED_ARRAY)
+#undef INSTALL_SHARED_TYPED_ARRAY
+}
+
+
 Handle<JSFunction> Genesis::InstallInternalArray(Handle<JSObject> target,
                                                  const char* name,
                                                  ElementsKind elements_kind) {
   // --- I n t e r n a l   A r r a y ---
   // An array constructor on the builtins object that works like
   // the public Array constructor, except that its prototype
   // doesn't inherit from Object.prototype.
   // To be used only for internal work by builtins. Instances
   // must not be leaked to user code.
   Handle<JSObject> prototype =
@@ skipping 538 matching lines @@
   static const char* harmony_unicode_regexps_natives[] = {nullptr};
   static const char* harmony_computed_property_names_natives[] = {nullptr};
   static const char* harmony_rest_parameters_natives[] = {nullptr};
   static const char* harmony_reflect_natives[] = {"native harmony-reflect.js",
                                                   nullptr};
   static const char* harmony_spreadcalls_natives[] = {
       "native harmony-spread.js", nullptr};
   static const char* harmony_destructuring_natives[] = {nullptr};
   static const char* harmony_object_natives[] = {"native harmony-object.js",
                                                  NULL};
+  static const char* harmony_shared_typed_arrays_natives[] = {
+      "native harmony-sharedarraybuffer.js",
+      "native harmony-sharedtypedarray.js", NULL};
 
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount(); i++) {
 #define INSTALL_EXPERIMENTAL_NATIVES(id, desc)                                \
   if (FLAG_##id) {                                                            \
     for (size_t j = 0; id##_natives[j] != NULL; j++) {                        \
       Vector<const char> script_name = ExperimentalNatives::GetScriptName(i); \
       if (strncmp(script_name.start(), id##_natives[j],                       \
                   script_name.length()) == 0) {                               \
         if (!CompileExperimentalBuiltin(isolate(), i)) return false;          \
@@ skipping 632 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 } }  // namespace v8::internal