[interpreter, debugger] support debug breaks via bytecode array copy

src/interpreter/interpreter-assembler.h

 // 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.
 
 #ifndef V8_INTERPRETER_INTERPRETER_ASSEMBLER_H_
 #define V8_INTERPRETER_INTERPRETER_ASSEMBLER_H_
 
 #include "src/allocation.h"
 #include "src/base/smart-pointers.h"
 #include "src/builtins.h"
@@ skipping 114 matching lines @@
 
   // Perform a stack guard check.
   void StackCheck();
 
   // Returns from the function.
   void InterpreterReturn();
 
   // Dispatch to the bytecode.
   void Dispatch();
 
+  // Dispatch to bytecode handler.
+  void DispatchToBytecodeHandler(compiler::Node* handler,
+                                 compiler::Node* bytecode_offset = nullptr);
+
   // Abort with the given bailout reason.
   void Abort(BailoutReason bailout_reason);
 
  protected:
   static bool TargetSupportsUnalignedAccess();
 
  private:
   // Returns a raw pointer to start of the register file on the stack.
   compiler::Node* RegisterFileRawPointer();
   // Returns a tagged pointer to the current function's BytecodeArray object.
@@ skipping 40 matching lines @@
   compiler::Node* stack_pointer_before_call_;
 
   DISALLOW_COPY_AND_ASSIGN(InterpreterAssembler);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_INTERPRETER_ASSEMBLER_H_