[builtins] New frame type for exits to C++ builtins

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index f9e87bfaba6e92d393701edc1f4037e55c4f8937..7cbf11b5fef1431d6324847c3956cdec11e9f59a 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -426,6 +426,22 @@ Handle<Object> Isolate::CaptureSimpleStackTrace(Handle<JSReceiver> error_object,
         }
       } break;
 
+      case StackFrame::BUILTIN_EXIT: {
+        BuiltinExitFrame* exit_frame = BuiltinExitFrame::cast(frame);
+        Handle<JSFunction> fun = handle(exit_frame->function(), this);
+        Handle<Code> code = handle(exit_frame->LookupCode(), this);
+        int offset =
+            static_cast<int>(exit_frame->pc() - code->instruction_start());
+
+        // For now, builtin exit frames do not pass along a receiver.
+        elements = MaybeGrow(this, elements, cursor, cursor + 4);
+        elements->set(cursor++, *factory()->undefined_value());
+        elements->set(cursor++, *fun);
+        elements->set(cursor++, *code);
+        elements->set(cursor++, Smi::FromInt(offset));
+        frames_seen++;
+      } break;
+
       case StackFrame::WASM: {
         WasmFrame* wasm_frame = WasmFrame::cast(frame);
         Code* code = wasm_frame->unchecked_code();
@@ -601,6 +617,17 @@ class CaptureStackTraceHelper {
     return stack_frame;
   }
 
+  Handle<JSObject> NewStackFrameObject(BuiltinExitFrame* frame) {
+    Handle<JSObject> stack_frame =
+        factory()->NewJSObject(isolate_->object_function());
+    Handle<JSFunction> fun = handle(frame->function(), isolate_);
+    if (!function_key_.is_null()) {
+      Handle<Object> fun_name = JSFunction::GetDebugName(fun);
+      JSObject::AddProperty(stack_frame, function_key_, fun_name, NONE);
+    }
+    return stack_frame;
+  }
+
   Handle<JSObject> NewStackFrameObject(WasmFrame* frame) {
     Handle<JSObject> stack_frame =
         factory()->NewJSObject(isolate_->object_function());
@@ -728,7 +755,13 @@ Handle<JSArray> Isolate::CaptureCurrentStackTrace(
         stack_trace_elems->set(frames_seen, *new_frame_obj);
         frames_seen++;
       }
+    } else if (frame->is_builtin_exit()) {
+      BuiltinExitFrame* exit_frame = BuiltinExitFrame::cast(frame);
+      Handle<JSObject> new_frame_obj = helper.NewStackFrameObject(exit_frame);
+      stack_trace_elems->set(frames_seen, *new_frame_obj);
+      frames_seen++;
     } else {
+      DCHECK(frame->is_wasm());
       WasmFrame* wasm_frame = WasmFrame::cast(frame);
       Handle<JSObject> new_frame_obj = helper.NewStackFrameObject(wasm_frame);
       stack_trace_elems->set(frames_seen, *new_frame_obj);