Tracing recursive function using XCode debugger

Question

How do I trace recursive functions like these that calls itself recursively two times? I wanted to create a tree of the calls. When I stumbled into this, how do I know which of the methods that currently are being executed? CountWays(numStairs-1) or CountWays(numStairs-2)

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The "tree of the calls" you're looking for is called a stack trace or back trace. I don't use xcode, but I assume there's a window or toolbar to display it. — Matt Kline
– Matt Kline, Commented Dec 7, 2012 at 19:52
When I stumbled into this, how do I know wich of the methods that currently are being executed? Why do you want to do that at all? Are you trying to understand how it works? What are you trying to accomplish? — phant0m
– phant0m, Commented Dec 7, 2012 at 21:50

Argylelabcoat · Accepted Answer · 2012-12-07 23:36:19Z

1

GDB answer?
If you see near the bottom-right of your screenshot there are 3 buttons in a group and the left-most button has been selected. Press either the center or the far-right button to open the debug console. In there you may type 'bt' and it will print your back-trace.

GUI answer? You need to trigger a backtrace upon your breakpoint (or exception breakpoint), instructions for this can be found here: http://www.oramind.com/index.php/articles/182-ios-5-xcode-backtrace

answered Dec 7, 2012 at 23:36

Argylelabcoat

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Louis Over a year ago

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