Install the 'name' property in classes at runtime

src/full-codegen/x64/full-codegen-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/full-codegen/full-codegen.h"
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
@@ skipping 1907 matching lines @@
         break;
 
       case ClassLiteral::Property::FIELD:
       default:
         UNREACHABLE();
     }
   }
 }
 
 
+void FullCodeGenerator::EmitClassDefineNameProperty(ClassLiteral* lit) {
+  DCHECK(!lit->constructor()->name().is_null());
+
+  // abort if 'name' is undefined
+  if (lit->constructor()->name()->length() == 0) return;
+
+  Label exit;
+
+  // if "name" is already defined, exit
+  PushOperand(Operand(rsp, 0));  // constructor
+  PushOperand(isolate()->factory()->name_string());
+  CallRuntimeWithOperands(Runtime::kObjectHasOwnProperty);
+  __ CompareRoot(result_register(), Heap::kTrueValueRootIndex);
+  __ j(equal, &exit, Label::kNear);
+
+  // define "name" property
+  PushOperand(Operand(rsp, 0));  // constructor
+  PushOperand(isolate()->factory()->name_string());
+  PushOperand(lit->constructor()->name());
+  PushOperand(Smi::FromInt(DONT_ENUM | READ_ONLY));
+  PushOperand(Smi::FromInt(0));  // NeedsSetFunctionName()
+  CallRuntimeWithOperands(Runtime::kDefineDataPropertyInLiteral);
+
+  __ bind(&exit);
+}
+
+
 void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) {
   PopOperand(rdx);
   Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code();
   JumpPatchSite patch_site(masm_);    // unbound, signals no inlined smi code.
   CallIC(code, expr->BinaryOperationFeedbackId());
   patch_site.EmitPatchInfo();
   context()->Plug(rax);
 }
 
 
@@ skipping 1671 matching lines @@
   DCHECK_EQ(
       isolate->builtins()->OnStackReplacement()->entry(),
       Assembler::target_address_at(call_target_address, unoptimized_code));
   return ON_STACK_REPLACEMENT;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64