Allow the debugger to inspect local variables from optimized and

runtime/vm/stack_frame.cc

 // 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.
 
 #include "vm/stack_frame.h"
 
 #include "vm/assembler.h"
 #include "vm/deopt_instructions.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
@@ skipping 378 matching lines @@
     if (deopt_instr->kind() == DeoptInstr::kRetAddress) {
       pc_ = DeoptInstr::GetRetAddress(deopt_instr, object_table_, &func);
       code_ = func.unoptimized_code();
       function_ = func.raw();
       return;
     }
   }
   SetDone();
 }
 
+
+// Finds the potential offset for the current function's FP if the
+// current frame were to be deoptimized.
+intptr_t InlinedFunctionsIterator::GetDeoptFpOffset() const {
+  ASSERT(deopt_instructions_.length() != 0);
+  for (intptr_t index = index_;
+       index < deopt_instructions_.length();
+       index++) {
+    DeoptInstr* deopt_instr = deopt_instructions_[index];
+    if (deopt_instr->kind() == DeoptInstr::kCallerFp) {
+      return index;
+    }
+  }
+  UNREACHABLE();
+  return 0;
+}
+
+
 }  // namespace dart