Switch profiler from isolates to threads

runtime/vm/stub_code.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_STUB_CODE_H_
 #define VM_STUB_CODE_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 
@@ skipping 91 matching lines @@
 
   static void ReadFrom(SnapshotReader* reader);
   static void WriteTo(SnapshotWriter* writer);
 
   // Generate all stubs which are generated on a per isolate basis as they
   // have embedded objects which are isolate specific.
   static void Init(Isolate* isolate);
 
   static void VisitObjectPointers(ObjectPointerVisitor* visitor);
 
+  // Returns true if stub code has been initialized.
+  static bool HasBeenInitialized();
+
   // Check if specified pc is in the dart invocation stub used for
   // transitioning into dart code.
   static bool InInvocationStub(uword pc);
 
   // Check if the specified pc is in the jump to exception handler stub.
   static bool InJumpToExceptionHandlerStub(uword pc);
 
   // Returns NULL if no stub found.
   static const char* NameOfStub(uword entry_point);
 
@@ skipping 59 matching lines @@
 
 
 enum DeoptStubKind {
   kLazyDeopt,
   kEagerDeopt
 };
 
 }  // namespace dart
 
 #endif  // VM_STUB_CODE_H_