[VM generic function reification] Support generic functions in Invocation class.

runtime/vm/dart_entry.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/dart_entry.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/debugger.h"
 #include "vm/object_store.h"
@@ skipping 195 matching lines @@
 
   // No compatible method or getter so invoke noSuchMethod.
   return InvokeNoSuchMethod(instance, Symbols::Call(), arguments,
                             arguments_descriptor);
 }
 
 RawObject* DartEntry::InvokeNoSuchMethod(const Instance& receiver,
                                          const String& target_name,
                                          const Array& arguments,
                                          const Array& arguments_descriptor) {
-  ASSERT(receiver.raw() == arguments.At(0));
+  const ArgumentsDescriptor args_desc(arguments_descriptor);
+  const intptr_t receiver_index = args_desc.TypeArgsLen() == 0 ? 0 : 1;
+  ASSERT(receiver.raw() == arguments.At(receiver_index));
   // Allocate an Invocation object.
   const Library& core_lib = Library::Handle(Library::CoreLibrary());
 
   Class& invocation_mirror_class = Class::Handle(core_lib.LookupClass(
       String::Handle(core_lib.PrivateName(Symbols::InvocationMirror()))));
   ASSERT(!invocation_mirror_class.IsNull());
   const String& function_name =
       String::Handle(core_lib.PrivateName(Symbols::AllocateInvocationMirror()));
   const Function& allocation_function = Function::Handle(
       invocation_mirror_class.LookupStaticFunction(function_name));
   ASSERT(!allocation_function.IsNull());
   const int kNumAllocationArgs = 4;
   const Array& allocation_args = Array::Handle(Array::New(kNumAllocationArgs));
   allocation_args.SetAt(0, target_name);
   allocation_args.SetAt(1, arguments_descriptor);
   allocation_args.SetAt(2, arguments);
   allocation_args.SetAt(3, Bool::False());  // Not a super invocation.
   const Object& invocation_mirror =
       Object::Handle(InvokeFunction(allocation_function, allocation_args));
   if (invocation_mirror.IsError()) {
     Exceptions::PropagateError(Error::Cast(invocation_mirror));
     UNREACHABLE();
   }
 
   // Now use the invocation mirror object and invoke NoSuchMethod.
   const int kTypeArgsLen = 0;
   const int kNumArguments = 2;
-  ArgumentsDescriptor args_desc(
+  ArgumentsDescriptor nsm_args_desc(
       Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, kNumArguments)));
-  Function& function = Function::Handle(
-      Resolver::ResolveDynamic(receiver, Symbols::NoSuchMethod(), args_desc));
+  Function& function = Function::Handle(Resolver::ResolveDynamic(
+      receiver, Symbols::NoSuchMethod(), nsm_args_desc));
   if (function.IsNull()) {
     ASSERT(!FLAG_lazy_dispatchers);
     // If noSuchMethod(invocation) is not found, call Object::noSuchMethod.
     Thread* thread = Thread::Current();
     function ^= Resolver::ResolveDynamicForReceiverClass(
         Class::Handle(thread->zone(),
                       thread->isolate()->object_store()->object_class()),
-        Symbols::NoSuchMethod(), args_desc);
+        Symbols::NoSuchMethod(), nsm_args_desc);
   }
   ASSERT(!function.IsNull());
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, receiver);
   args.SetAt(1, invocation_mirror);
   return InvokeFunction(function, args);
 }
 
 ArgumentsDescriptor::ArgumentsDescriptor(const Array& array) : array_(array) {}
 
@@ skipping 353 matching lines @@
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, map);
   args.SetAt(1, key);
   args.SetAt(2, value);
   const Object& result =
       Object::Handle(DartEntry::InvokeFunction(function, args));
   return result.raw();
 }
 
 }  // namespace dart