CODEWITHSUNDEEP
objective-cxcodedebugging
Eric
Eric

Reputation: 19873

XCode debugger weird behavior

I have an iPhone app that I am trying to debug.

One of my method returns a wrong value only when executing code, in the debugger it is fine.

int finalResponse = 0;
finalResponse = [data getInteger:@"final_response"];

then in the debugger

p finalResponse  
(int) $0 = 130450628

p [data getInteger:@"final_response"]
(int) $1 = 0

I am expecting the 0 value, the other one is garbage. I don't understand why it yields different result depending on how I execute the function.

edit:

getInteger returns an int It uses an underlying c library which returns a (const void*), like this

int* value = get_dictionary_value("final_response", dictionary);
int val = (int) *value;
return val;

Upvotes: 1

Views: 172

Answers (2)

basawyer
basawyer

Reputation: 36

Sometimes I experience weird debugging behavior when I debug using a release build; make sure you're using the right build phase for debugging.

Upvotes: 1

bbum
bbum

Reputation: 162722

Does the [poorly named -- shouldn't have a get prefix] getInteger: method do anything like advance an index into data?

Or does getInteger: return an NSNumber?

How is getInteger: implemented?

With just that code, it is hard to say.

Upvotes: 3

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