Disable concurrent marking/sweeping, and background compilation on ARMv5TE

runtime/vm/scavenger.cc

 // 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.
 
 #include "vm/scavenger.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 
@@ skipping 13 matching lines @@
 #include "vm/weak_table.h"
 
 namespace dart {
 
 DEFINE_FLAG(int, early_tenuring_threshold, 66,
             "When more than this percentage of promotion candidates survive, "
             "promote all survivors of next scavenge.");
 DEFINE_FLAG(int, new_gen_garbage_threshold, 90,
             "Grow new gen when less than this percentage is garbage.");
 DEFINE_FLAG(int, new_gen_growth_factor, 4, "Grow new gen by this factor.");
-DECLARE_FLAG(bool, concurrent_sweep);
 
 // Scavenger uses RawObject::kMarkBit to distinguish forwaded and non-forwarded
 // objects. The kMarkBit does not intersect with the target address because of
 // object alignment.
 enum {
   kForwardingMask = 1 << RawObject::kMarkBit,
   kNotForwarded = 0,
   kForwarded = kForwardingMask,
 };
 
@@ skipping 826 matching lines @@
 }
 
 
 void Scavenger::FreeExternal(intptr_t size) {
   ASSERT(size >= 0);
   external_size_ -= size;
   ASSERT(external_size_ >= 0);
 }
 
 }  // namespace dart