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

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 08e42b45e47331a1f065bb64006397c165432c22..17abc458eb0d155de28a897666b50e6e37256c05 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4502,6 +4502,8 @@ class BytecodeArray : public FixedArrayBase {
 
   void Disassemble(std::ostream& os);
 
+  void CopyTo(BytecodeArray* to);
+
   // Layout description.
   static const int kFrameSizeOffset = FixedArrayBase::kHeaderSize;
   static const int kParameterSizeOffset = kFrameSizeOffset + kIntSize;
@@ -10669,6 +10671,8 @@ class DebugInfo: public Struct {
   // Get the number of break points for this function.
   int GetBreakPointCount();
 
+  static Smi* uninitialized() { return Smi::FromInt(0); }
+
   DECLARE_CAST(DebugInfo)
 
   // Dispatched behavior.