Revert 21502 - "Move OS::MemCopy and OS::MemMove out of platform to utils"

src/execution.cc

 // Copyright 2014 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.
 
 #include "execution.h"
 
 #include "bootstrapper.h"
 #include "codegen.h"
 #include "deoptimizer.h"
 #include "isolate-inl.h"
@@ skipping 362 matching lines @@
   thread_local_.interrupt_flags_ &= ~flagbit;
   if (!should_postpone_interrupts(lock) && !has_pending_interrupts(lock)) {
     reset_limits(lock);
   }
   return result;
 }
 
 
 char* StackGuard::ArchiveStackGuard(char* to) {
   ExecutionAccess access(isolate_);
-  MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
+  OS::MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
   ThreadLocal blank;
 
   // Set the stack limits using the old thread_local_.
   // TODO(isolates): This was the old semantics of constructing a ThreadLocal
   //                 (as the ctor called SetStackLimits, which looked at the
   //                 current thread_local_ from StackGuard)-- but is this
   //                 really what was intended?
   isolate_->heap()->SetStackLimits();
   thread_local_ = blank;
 
   return to + sizeof(ThreadLocal);
 }
 
 
 char* StackGuard::RestoreStackGuard(char* from) {
   ExecutionAccess access(isolate_);
-  MemCopy(reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
+  OS::MemCopy(
+      reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
   isolate_->heap()->SetStackLimits();
   return from + sizeof(ThreadLocal);
 }
 
 
 void StackGuard::FreeThreadResources() {
   Isolate::PerIsolateThreadData* per_thread =
       isolate_->FindOrAllocatePerThreadDataForThisThread();
   per_thread->set_stack_limit(thread_local_.real_climit_);
 }
@@ skipping 335 matching lines @@
 
   if (has_api_interrupt) {
     // Callback must be invoked outside of ExecusionAccess lock.
     isolate_->InvokeApiInterruptCallback();
   }
 
   return isolate_->heap()->undefined_value();
 }
 
 } }  // namespace v8::internal