# CallStackThread A single stack thread within a call stack tree. ``` struct CallStackThread ``` ## Topics ### Frames [`let rootFrames: ContiguousArray`](/documentation/MetricKit/CallStackThread/rootFrames) Root frames for this call stack thread [`let threadAttributed: Bool?`](/documentation/MetricKit/CallStackThread/threadAttributed) Indicates whether this call stack is attributed to a specific thread. ## Relationships ### Conforms To [`Encodable`](/documentation/Swift/Encodable) [`Equatable`](/documentation/Swift/Equatable) [`Hashable`](/documentation/Swift/Hashable) [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Decodable`](/documentation/Swift/Decodable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)