Check for a passed-in type argument vector in the prolog of generic functions.

runtime/vm/native_arguments.h

 // Copyright (c) 2012, 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.
 
 #ifndef RUNTIME_VM_NATIVE_ARGUMENTS_H_
 #define RUNTIME_VM_NATIVE_ARGUMENTS_H_
 
 #include "platform/assert.h"
 #include "platform/memory_sanitizer.h"
 #include "vm/globals.h"
@@ skipping 133 matching lines @@
   static intptr_t argc_tag_offset() {
     return OFFSET_OF(NativeArguments, argc_tag_);
   }
   static intptr_t argv_offset() { return OFFSET_OF(NativeArguments, argv_); }
   static intptr_t retval_offset() {
     return OFFSET_OF(NativeArguments, retval_);
   }
 
   static intptr_t ParameterCountForResolution(const Function& function) {
     ASSERT(function.is_native());
+    ASSERT(!function.IsGeneric());                // Not supported.
     ASSERT(!function.IsGenerativeConstructor());  // Not supported.
     intptr_t count = function.NumParameters();
     if (function.is_static() && function.IsClosureFunction()) {
       // The closure object is hidden and not accessible from native code.
       // However, if the function is an instance closure function, the captured
       // receiver located in the context is made accessible in native code at
       // index 0, thereby hidding the closure object at index 0.
       count--;
     }
     return count;
   }
 
   static int ComputeArgcTag(const Function& function) {
     ASSERT(function.is_native());
+    ASSERT(!function.IsGeneric());                // Not supported.
     ASSERT(!function.IsGenerativeConstructor());  // Not supported.
     int tag = ArgcBits::encode(function.NumParameters());
     int function_bits = 0;
     if (!function.is_static()) {
       function_bits |= kInstanceFunctionBit;
     }
     if (function.IsClosureFunction()) {
       function_bits |= kClosureFunctionBit;
     }
     tag = FunctionBits::update(function_bits, tag);
@@ skipping 56 matching lines @@
 
   Thread* thread_;      // Current thread pointer.
   intptr_t argc_tag_;   // Encodes argument count and invoked native call type.
   RawObject** argv_;    // Pointer to an array of arguments to runtime call.
   RawObject** retval_;  // Pointer to the return value area.
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_NATIVE_ARGUMENTS_H_