Cleanup native, collected, and stub code handling in profiler

runtime/vm/raw_object.h

 // Copyright (c) 2012, 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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 421 matching lines @@
 
   intptr_t SizeFromClass() const;
 
   intptr_t GetClassId() const {
     uword tags = ptr()->tags_;
     return ClassIdTag::decode(tags);
   }
 
   friend class Api;
   friend class Array;
+  friend class Code;
   friend class FreeListElement;
   friend class GCMarker;
   friend class ExternalTypedData;
   friend class Heap;
   friend class ClassStatsVisitor;
   friend class MarkingVisitor;
   friend class Object;
   friend class ObjectHistogram;
   friend class RawExternalTypedData;
   friend class RawInstructions;
@@ skipping 357 matching lines @@
 };
 
 
 class RawCode : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Code);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->instructions_);
   }
   RawInstructions* instructions_;
-  RawFunction* function_;
+  // If owner_ is Function::null() the owner is a regular stub.
+  // If owner_ is a Class the owner is the allocation stub for that class.
+  // Else, owner_ is a regular Dart Function.
+  RawObject* owner_;  // Function, Null, or a Class.
   RawExceptionHandlers* exception_handlers_;
   RawPcDescriptors* pc_descriptors_;
   RawArray* deopt_info_array_;
   RawArray* object_table_;
   RawArray* static_calls_target_table_;  // (code-offset, function, code).
   RawArray* stackmaps_;
   RawLocalVarDescriptors* var_descriptors_;
   RawArray* comments_;
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->comments_);
@@ skipping 938 matching lines @@
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kTypedDataInt8ArrayViewCid == kTypedDataInt8ArrayCid + 14);
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayViewCid + 15);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 14);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_