Debug: parameterize 'step over' action with a frame where the step must be performed

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 9e44b586bd36e48807fb6a989f264d11681f0edd..56558e0ab5dfb33400523f2a7566da72481ab90b 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -12484,7 +12484,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_IsBreakOnException) {
 //          of frames to step down.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_PrepareStep) {
   HandleScope scope(isolate);
-  ASSERT(args.length() == 3);
+  ASSERT(args.length() == 4);
   // Check arguments.
   Object* check;
   { MaybeObject* maybe_check = Runtime_CheckExecutionState(
@@ -12495,6 +12495,15 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_PrepareStep) {
     return isolate->Throw(isolate->heap()->illegal_argument_string());
   }
 
+  CONVERT_NUMBER_CHECKED(int, wrapped_frame_id, Int32, args[3]);
+
+  StackFrame::Id frame_id;
+  if (wrapped_frame_id == 0) {
+    frame_id = StackFrame::NO_ID;
+  } else {
+    frame_id = UnwrapFrameId(wrapped_frame_id);
+  }
+
   // Get the step action and check validity.
   StepAction step_action = static_cast<StepAction>(NumberToInt32(args[1]));
   if (step_action != StepIn &&
@@ -12505,6 +12514,11 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_PrepareStep) {
     return isolate->Throw(isolate->heap()->illegal_argument_string());
   }
 
+  if (frame_id != StackFrame::NO_ID && step_action != StepNext &&
+      step_action != StepMin && step_action != StepOut) {
+    return isolate->ThrowIllegalOperation();
+  }
+
   // Get the number of steps.
   int step_count = NumberToInt32(args[2]);
   if (step_count < 1) {
@@ -12516,7 +12530,8 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_PrepareStep) {
 
   // Prepare step.
   isolate->debug()->PrepareStep(static_cast<StepAction>(step_action),
-                                step_count);
+                                step_count,
+                                frame_id);
   return isolate->heap()->undefined_value();
 }