QuickDraw is the legacy 2D drawing engine for Macintosh computers and was deprecated in Tiger (10.4) but is still available for 32-bit applications on 10.4, 10.5 and 10.6. 64-bit applications can’t use QuickDraw yet and Apple recommends to switch to other technologies like Quartz 2D.
Here are different solutions to display automatically a backtrace when entering a specific function in your application. As an example we will take the following program. It’s a really simple program: the main function calls the function function1 which prints a string.