[
  {
    "mode": 0,
    "returncode": 0,
    "stages": [
      "copy_begin",
      "copy_returned",
      "release_returned"
    ]
  },
  {
    "mode": 1,
    "returncode": -11,
    "stages": [
      "frame_owner_matches=1",
      "copy_begin"
    ]
  },
  {
    "mode": 2,
    "returncode": -11,
    "stages": [
      "frame_owner_matches=1",
      "copy_begin"
    ]
  }
]