- Register canonical names for internal VM classes and get rid of the method GetSingletonClassName

vm/stub_code_x64.cc

 // 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.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/assembler_macros.h"
 #include "vm/compiler.h"
@@ skipping 270 matching lines @@
   __ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
   __ movq(RAX, Address(RAX, Isolate::object_store_offset()));
   __ movq(RAX, Address(RAX, ObjectStore::object_class_offset()));
 
   __ Bind(&class_in_rax);
   // Class is in RAX.
 
   Label loop, next_iteration;
   // Get functions_cache, since it is allocated lazily it maybe null.
   __ movq(RAX, FieldAddress(RAX, Class::functions_cache_offset()));
+  __ cmpq(RAX, raw_null);
+  __ j(EQUAL, &not_found, Assembler::kNearJump);
+
   // Iterate and search for identical name.
   __ leaq(R12, FieldAddress(RAX, Array::data_offset()));
 
   // R12 is  pointing into content of functions_map_ array.
   __ Bind(&loop);
   __ movq(R13, Address(R12, FunctionsCache::kFunctionName * kWordSize));
 
   __ cmpq(R13, raw_null);
   __ j(EQUAL, &not_found, Assembler::kNearJump);
 
@@ skipping 1631 matching lines @@
 void StubCode::GenerateJumpToErrorHandlerStub(Assembler* assembler) {
   __ movq(RAX, RCX);  // error object.
   __ movq(RBP, RDX);  // target frame_pointer.
   __ movq(RSP, RSI);  // target stack_pointer.
   __ jmp(RDI);  // Jump to the exception handler code.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64