---
title: callStackSymbols
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/thread/callstacksymbols
---

# callStackSymbols

Returns an array containing the call stack symbols.

## Declaration

```swift
class var callStackSymbols: [String] { get }
```

## Return Value

Return Value An array containing the call stack symbols. Each element is an NSString object with a value in a format determined by the backtrace_symbols() function. For more information, see backtrace_symbols(3) macOS Developer Tools Manual Page.

## Discussion

Discussion The return value describes the call stack backtrace of the current thread at the moment this method was called.

## See Also

### Querying the Environment

- [isMultiThreaded()](foundation/thread/ismultithreaded().md)
- [current](foundation/thread/current.md)
- [callStackReturnAddresses](foundation/thread/callstackreturnaddresses.md)