[Isolates] Pass isolate to VMState constructor.

src/api.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 31 matching lines @@
 #include "profile-generator-inl.h"
 #include "serialize.h"
 #include "snapshot.h"
 #include "v8threads.h"
 #include "version.h"
 
 #include "../include/v8-profiler.h"
 
 #define LOG_API(expr) LOG(ApiEntryCall(expr))
 
+// TODO(isolates): avoid repeated TLS reads in function prologues.
 #ifdef ENABLE_VMSTATE_TRACKING
-#define ENTER_V8 i::VMState __state__(i::OTHER)
-#define LEAVE_V8 i::VMState __state__(i::EXTERNAL)
+#define ENTER_V8 i::VMState __state__(i::Isolate::Current(), i::OTHER)
+#define LEAVE_V8 i::VMState __state__(i::Isolate::Current(), i::EXTERNAL)
 #else
 #define ENTER_V8 ((void) 0)
 #define LEAVE_V8 ((void) 0)
 #endif
 
 namespace v8 {
 
 #define ON_BAILOUT(location, code)                                 \
   if (IsDeadCheck(location) || v8::V8::IsExecutionTerminating()) { \
     code;                                                          \
@@ skipping 4941 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* thread_local =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   thread_local->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal