Get formatted call stack symbols.

Related tags

Utility CallStackSymbols
Overview

CallStackSymbols

Formatted call stack symbols for iOS.

Installation

Supports Swift Package Manager.

Usage

Get current call stack symbols as DLADDR array.

let symbols = CallStackSymbols.current()

Parse raw string from Thread.callStackSymbols.

let parser = CallStackSymbols.DLADDRParser()
let callStackSymbols = Thread.callStackSymbols
for callStackSymbol in callStackSymbols {
  let dladdr = try parser.parse(input: callStackSymbol)
  // ...
}

What is DLADDR?

DLADDR is struct defined here.

This library internally call Thread.callStackSymbols. Documentation of Thread.callStackSymbols says Each element is an NSString object with a value in a format determined by the backtrace_symbols() function.

Information about backtrace_symbols() can be seen by $ man backtrace_symbols and manual says backtrace_symbols() attempts to transform a call stack obtained by backtrace() into an array of human-readable strings using dladdr().

Detail of dladdr() can be seen by $ man dladdr. The information treated by dladdr() contains 2 set of name and address. The values returned value by Thread.callStackSymbols cannot read as-is because raw value is array of string. So I defined struct DLADDR and parse raw string into that formatted structure.

License

MIT

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