| Debugging with GDB: The Print Command with Objective-C |
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The print command has also been extended to accept methods. For example:
print -[object hash]
will tell GDB to send the hash message to object
and print the result. Also, an additional command has been added,
print-object or po for short, which is meant to print
the description of an object. However, this command may only work
with certain Objective-C libraries that have a particular hook
function, _NSPrintForDebugger, defined.