Implement rewind: drop one or more frames from the debugger.

runtime/vm/flow_graph_compiler.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 "vm/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
@@ skipping 1253 matching lines @@
                             deopt_id, token_pos, locs);
   } else {
     ICData& call_ic_data = ICData::ZoneHandle(ic_data.raw());
     if (call_ic_data.IsNull()) {
       const intptr_t kNumArgsChecked = 0;
       call_ic_data =
           GetOrAddStaticCallICData(deopt_id, function, arguments_descriptor,
                                    kNumArgsChecked)
               ->raw();
     }
+    AddCurrentDescriptor(RawPcDescriptors::kRewind, deopt_id, token_pos);
     EmitUnoptimizedStaticCall(argument_count, deopt_id, token_pos, locs,
                               call_ic_data);
   }
 }
 
 
 void FlowGraphCompiler::GenerateNumberTypeCheck(Register kClassIdReg,
                                                 const AbstractType& type,
                                                 Label* is_instance_lbl,
                                                 Label* is_not_instance_lbl) {
@@ skipping 696 matching lines @@
 
 
 void FlowGraphCompiler::FrameStateClear() {
   ASSERT(!is_optimizing());
   frame_state_.TruncateTo(0);
 }
 #endif  // defined(DEBUG) && !defined(TARGET_ARCH_DBC)
 
 
 }  // namespace dart