New growth strategy for growable arrays

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 RUNTIME_VM_RAW_OBJECT_H_
 #define RUNTIME_VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/exceptions.h"
@@ skipping 409 matching lines @@
   }
   bool IsPseudoObject() const {
     return IsFreeListElement() || IsForwardingCorpse();
   }
 
   intptr_t Size() const {
     uword tags = ptr()->tags_;
     intptr_t result = SizeTag::decode(tags);
     if (result != 0) {
 #if defined(DEBUG)
-      // TODO(22501) Array::MakeArray has a race with this code: we might have
-      // loaded tags field and then MakeArray could have updated it leading
-      // to inconsistency between SizeFromClass() and SizeTag::decode(tags).
-      // We are working around it by reloading tags_ and recomputing
-      // size from tags.
+      // TODO(22501) Array::MakeFixedLength has a race with this code: we might
+      // have loaded tags field and then MakeFixedLength could have updated it
+      // leading to inconsistency between SizeFromClass() and
+      // SizeTag::decode(tags). We are working around it by reloading tags_ and
+      // recomputing size from tags.
       const intptr_t size_from_class = SizeFromClass();
       if ((result > size_from_class) && (GetClassId() == kArrayCid) &&
           (ptr()->tags_ != tags)) {
         result = SizeTag::decode(ptr()->tags_);
       }
       ASSERT(result == size_from_class);
 #endif
       return result;
     }
     result = SizeFromClass();
@@ skipping 2051 matching lines @@
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_RAW_OBJECT_H_