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

src/debug/debug-frames.cc

Index: src/debug/debug-frames.cc
diff --git a/src/debug/debug-frames.cc b/src/debug/debug-frames.cc
index f01354500b0e5ce1670a45e8e7afe6087158f99f..25634be8d233178429cfd8cf0fe3ae739cf96f0c 100644
--- a/src/debug/debug-frames.cc
+++ b/src/debug/debug-frames.cc
@@ -15,6 +15,7 @@ FrameInspector::FrameInspector(JavaScriptFrame* frame,
   has_adapted_arguments_ = frame_->has_adapted_arguments();
   is_bottommost_ = inlined_jsframe_index == 0;
   is_optimized_ = frame_->is_optimized();
+  is_interpreted_ = frame_->is_interpreted();
   // Calculate the deoptimized frame.
   if (frame->is_optimized()) {
     // TODO(turbofan): Revisit once we support deoptimization.
@@ -69,6 +70,11 @@ Handle<Object> FrameInspector::GetExpression(int index) {
 int FrameInspector::GetSourcePosition() {
   if (is_optimized_) {
     return deoptimized_frame_->GetSourcePosition();
+  } else if (is_interpreted_) {
+    InterpretedFrame* frame = reinterpret_cast<InterpretedFrame*>(frame_);
+    BytecodeArray* bytecode_array =
+        frame->function()->shared()->bytecode_array();
+    return bytecode_array->SourcePosition(frame->GetBytecodeOffset());
   } else {
     Code* code = frame_->LookupCode();
     int offset = static_cast<int>(frame_->pc() - code->instruction_start());
@@ -95,6 +101,7 @@ void FrameInspector::SetArgumentsFrame(JavaScriptFrame* frame) {
   DCHECK(has_adapted_arguments_);
   frame_ = frame;
   is_optimized_ = frame_->is_optimized();
+  is_interpreted_ = frame_->is_interpreted();
   DCHECK(!is_optimized_);
 }