Implement function proxies (except for their use as constructors).

src/runtime.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 594 matching lines @@
 RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateJSProxy) {
   ASSERT(args.length() == 2);
   Object* handler = args[0];
   Object* prototype = args[1];
   Object* used_prototype =
       prototype->IsJSReceiver() ? prototype : isolate->heap()->null_value();
   return isolate->heap()->AllocateJSProxy(handler, used_prototype);
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateJSFunctionProxy) {
+  ASSERT(args.length() == 4);
+  Object* handler = args[0];
+  Object* call_trap = args[1];
+  Object* construct_trap = args[2];
+  Object* prototype = args[3];
+  Object* used_prototype =
+      prototype->IsJSReceiver() ? prototype : isolate->heap()->null_value();
+  return isolate->heap()->AllocateJSFunctionProxy(
+      handler, call_trap, construct_trap, used_prototype);
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_IsJSProxy) {
   ASSERT(args.length() == 1);
   Object* obj = args[0];
   return isolate->heap()->ToBoolean(obj->IsJSProxy());
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_IsJSFunctionProxy) {
+  ASSERT(args.length() == 1);
+  Object* obj = args[0];
+  return isolate->heap()->ToBoolean(obj->IsJSFunctionProxy());
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetHandler) {
   ASSERT(args.length() == 1);
   CONVERT_CHECKED(JSProxy, proxy, args[0]);
   return proxy->handler();
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetCallTrap) {
+  ASSERT(args.length() == 1);
+  CONVERT_CHECKED(JSFunctionProxy, proxy, args[0]);
+  return proxy->call_trap();
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetConstructTrap) {
+  ASSERT(args.length() == 1);
+  CONVERT_CHECKED(JSFunctionProxy, proxy, args[0]);
+  return proxy->construct_trap();
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_Fix) {
   ASSERT(args.length() == 1);
   CONVERT_CHECKED(JSProxy, proxy, args[0]);
   proxy->Fix();
   return isolate->heap()->undefined_value();
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapInitialize) {
   HandleScope scope(isolate);
@@ skipping 4214 matching lines @@
         return isolate->heap()->boolean_symbol();
       }
       if (heap_obj->IsNull()) {
         return FLAG_harmony_typeof
             ? isolate->heap()->null_symbol()
             : isolate->heap()->object_symbol();
       }
       ASSERT(heap_obj->IsUndefined());
       return isolate->heap()->undefined_symbol();
     case JS_FUNCTION_TYPE:
+    case JS_FUNCTION_PROXY_TYPE:
       return isolate->heap()->function_symbol();
     default:
       // For any kind of object not handled above, the spec rule for
       // host objects gives that it is okay to return "object"
       return isolate->heap()->object_symbol();
   }
 }
 
 
 static bool AreDigits(const char*s, int from, int to) {
@@ skipping 3332 matching lines @@
     return Smi::FromInt(ast_id);
   } else {
     if (function->IsMarkedForLazyRecompilation()) {
       function->ReplaceCode(function->shared()->code());
     }
     return Smi::FromInt(-1);
   }
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_Apply) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 5);
+  CONVERT_CHECKED(JSReceiver, fun, args[0]);
+  Object* receiver = args[1];
+  CONVERT_CHECKED(JSObject, arguments, args[2]);
+  CONVERT_CHECKED(Smi, shift, args[3]);
+  CONVERT_CHECKED(Smi, arity, args[4]);
+
+  int offset = shift->value();
+  int argc = arity->value();
+  ASSERT(offset >= 0);
+  ASSERT(argc >= 0);
+
+  // If there are too many arguments, allocate argv via malloc.
+  const int argv_small_size = 10;
+  Handle<Object> argv_small_buffer[argv_small_size];
+  SmartPointer<Handle<Object> > argv_large_buffer;
+  Handle<Object>* argv = argv_small_buffer;
+  if (argc > argv_small_size) {
+    argv = new Handle<Object>[argc];
+    if (argv == NULL) return isolate->StackOverflow();
+    argv_large_buffer = SmartPointer<Handle<Object> >(argv);
+  }
+
+  for (int i = 0; i < argc; ++i) {
+     MaybeObject* maybe = arguments->GetElement(offset + i);
+     Object* object;
+     if (!maybe->To<Object>(&object)) return maybe;
+     argv[i] = Handle<Object>(object);
+  }
+
+  bool threw = false;
+  Handle<JSReceiver> hfun(fun);
+  Handle<Object> hreceiver(receiver);
+  Handle<Object> result = Execution::Call(
+      hfun, hreceiver, argc, reinterpret_cast<Object***>(argv), &threw, true);
+
+  if (threw) return Failure::Exception();
+  return *result;
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFunctionDelegate) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   RUNTIME_ASSERT(!args[0]->IsJSFunction());
   return *Execution::GetFunctionDelegate(args.at<Object>(0));
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetConstructorDelegate) {
   HandleScope scope(isolate);
@@ skipping 4614 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal