Make whether or not a Code object should be created by masm explicit

src/x64/macro-assembler-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/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/heap/heap.h"
 #include "src/register-configuration.h"
 #include "src/x64/assembler-x64.h"
 #include "src/x64/macro-assembler-x64.h"
 
 namespace v8 {
 namespace internal {
 
-MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
+MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size,
+                               bool create_code_object)
     : Assembler(arg_isolate, buffer, size),
       generating_stub_(false),
       has_frame_(false),
       root_array_available_(true) {
-  if (isolate() != NULL) {
+  if (create_code_object) {
     code_object_ =
         Handle<Object>::New(isolate()->heap()->undefined_value(), isolate());
   }
 }
 
 
 static const int64_t kInvalidRootRegisterDelta = -1;
 
 
 int64_t MacroAssembler::RootRegisterDelta(ExternalReference other) {
@@ skipping 5147 matching lines @@
   int n_of_non_aliasing_regs = NumRegs(regs);
 
   return n_of_valid_regs != n_of_non_aliasing_regs;
 }
 #endif
 
 
 CodePatcher::CodePatcher(byte* address, int size)
     : address_(address),
       size_(size),
-      masm_(NULL, address, size + Assembler::kGap) {
+      masm_(NULL, address, size + Assembler::kGap, false) {
   // Create a new macro assembler pointing to the address of the code to patch.
   // The size is adjusted with kGap on order for the assembler to generate size
   // bytes of instructions without failing with buffer size constraints.
   DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 
 CodePatcher::~CodePatcher() {
   // Indicate that code has changed.
   Assembler::FlushICacheWithoutIsolate(address_, size_);
@@ skipping 308 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64