[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 b141ac902adf9ebaea886d928abd561541132ede..b51d5aaffdb71d4fb32d24f982c465349a2efbf1 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7,7 +7,6 @@
 
 #include <iosfwd>
 
-#include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/bailout-reason.h"
 #include "src/base/bits.h"
@@ -4474,6 +4473,8 @@ class BytecodeArray : public FixedArrayBase {
 
   void Disassemble(std::ostream& os);
 
+  void CopyTo(BytecodeArray* to);

[Michael Starzinger, 2016/02/22 09:37:49]

nit: Can we call this "CopyBytecodesTo" instead? That would make it clear that
we are only copying the bytecode payload here, not the header fields.

[Yang, 2016/02/22 12:48:43]

Done.

+
   // Layout description.
   static const int kFrameSizeOffset = FixedArrayBase::kHeaderSize;
   static const int kParameterSizeOffset = kFrameSizeOffset + kIntSize;
@@ -10643,6 +10644,10 @@ class DebugInfo: public Struct {
   // Get the number of break points for this function.
   int GetBreakPointCount();
 
+  static Smi* uninitialized() { return Smi::FromInt(0); }
+
+  inline BytecodeArray* original_bytecode_array();
+
   DECLARE_CAST(DebugInfo)
 
   // Dispatched behavior.