Can anybody use Leaks? (from Instruments)

I've written a simple program in C and objC with a leak, and I cannot understand Leaks. here it is:

int main(void) { int t = 78; t = malloc(50); t = 4; return 0; }

Can it show me which variable is the leak, or where it leaks?

Every Leaks tutoria开发者_如何学编程l on the internet (all two of them) are bad.

please help?

If you are testing the Leaks instrument with the code you provided, it is no wonder that it can't uncover any problems.

• Leaks has a default snapshot interval of 10 seconds. But your program won't even run for 10s.
• You are allocating in the scope of the application's entry point. "t" is valid (when not freed) until main exits. So the OS would reclaim the memory anyway.
• And foremost: Your code does not contain a leak. It would be a leak if you "loose reference" to t. (e.g. by doing another t = malloc() or assigning t some other variable)

If you want to see Leaks in action, create a default Cocoa Application, add an instance variable "test" to your AppDelegate and put the following code into the implementation.

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
   test = malloc(50);
   test = malloc(20);
}

I've not used Leaks, but there are plenty of tutorials on the net, starting with Apple's - Apple's developer documentation on the subject, Mobile Orchard and Cocoa is my Girlfriend, which seems to be the best.