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

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 38199f8c5826fbbee560d6dde3bb78a317009d35..5d6727a0a486ac794405deb13e42657c29d97a73 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -612,6 +612,19 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateJSProxy) {
 }
 
 
+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];
@@ -619,6 +632,14 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_IsJSProxy) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_IsJSFunctionProxy) {
+  ASSERT(args.length() == 1);
+  Object* obj = args[0];
+  return obj->IsJSFunctionProxy()
+      ? isolate->heap()->true_value() : isolate->heap()->false_value();

[Kevin Millikin (Chromium), 2011/09/08 17:30:40]

return isolate->heap()->ToBoolean(obj->IsJSFunctionProxy());

[rossberg, 2011/09/09 17:05:30]

Done.

+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetHandler) {
   ASSERT(args.length() == 1);
   CONVERT_CHECKED(JSProxy, proxy, args[0]);
@@ -626,6 +647,20 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetHandler) {
 }
 
 
+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]);
@@ -4860,6 +4895,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_Typeof) {
       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