[liveedit] reimplement frame restarting.

src/interpreter/interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/ast/prettyprinter.h"
@@ skipping 2966 matching lines @@
   Node* accumulator = __ GetAccumulator();
   __ Return(accumulator);
 }
 
 // Debugger
 //
 // Call runtime to handle debugger statement.
 void Interpreter::DoDebugger(InterpreterAssembler* assembler) {
   Node* context = __ GetContext();
   __ CallRuntime(Runtime::kHandleDebuggerStatement, context);
+  __ MaybeDropFrames(context);
   __ Dispatch();
 }
 
 // DebugBreak
 //
 // Call runtime to handle a debug break.
 #define DEBUG_BREAK(Name, ...)                                                \
   void Interpreter::Do##Name(InterpreterAssembler* assembler) {               \
     Node* context = __ GetContext();                                          \
     Node* accumulator = __ GetAccumulator();                                  \
     Node* original_handler =                                                  \
         __ CallRuntime(Runtime::kDebugBreakOnBytecode, context, accumulator); \
+    __ MaybeDropFrames(context);                                              \
     __ DispatchToBytecodeHandler(original_handler);                           \
   }
 DEBUG_BREAK_BYTECODE_LIST(DEBUG_BREAK);
 #undef DEBUG_BREAK
 
 void Interpreter::BuildForInPrepareResult(Node* output_register,
                                           Node* cache_type, Node* cache_array,
                                           Node* cache_length,
                                           InterpreterAssembler* assembler) {
   __ StoreRegister(cache_type, output_register);
@@ skipping 250 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8