New growth strategy for growable arrays

runtime/lib/stacktrace.cc

 // Copyright (c) 2013, 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.
 
 #include "lib/stacktrace.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/debugger.h"
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
 #include "vm/object_store.h"
@@ skipping 155 matching lines @@
 
 // Creates a StackTrace object from the current stack.
 //
 // Skips the first skip_frames Dart frames.
 const StackTrace& GetCurrentStackTrace(int skip_frames) {
   const GrowableObjectArray& code_list =
       GrowableObjectArray::Handle(GrowableObjectArray::New());
   const GrowableObjectArray& pc_offset_list =
       GrowableObjectArray::Handle(GrowableObjectArray::New());
   AppendFrames(code_list, pc_offset_list, skip_frames);
-  const Array& code_array = Array::Handle(Array::MakeArray(code_list));
+  const Array& code_array = Array::Handle(Array::MakeFixedLength(code_list));
   const Array& pc_offset_array =
-      Array::Handle(Array::MakeArray(pc_offset_list));
+      Array::Handle(Array::MakeFixedLength(pc_offset_list));
   const StackTrace& stacktrace =
       StackTrace::Handle(StackTrace::New(code_array, pc_offset_array));
   return stacktrace;
 }
 
 
 // An utility method for convenient printing of dart stack traces when
 // inside 'gdb'. Note: This function will only work when there is a
 // valid exit frame information. It will not work when a breakpoint is
 // set in dart code and control is got inside 'gdb' without going through
@@ skipping 10 matching lines @@
                             Thread::Current(),
                             StackFrameIterator::kNoCrossThreadIteration);
   StackFrame* frame = frames.NextFrame();
   while (frame != NULL) {
     OS::PrintErr("%s\n", frame->ToCString());
     frame = frames.NextFrame();
   }
 }
 
 }  // namespace dart