I gave a talk this weekend about debugging tools I love (here are the slides, such as they are). I think of these tools like a swiss army knife — if something on your system is wrong or slow, in any programming language, knowing how to use them can really help you out. I’ve written pretty extensively on this, but I didn’t have a central list to refer to. So! Here’s the list of my current favorite tools. There are only 5! I’ve used all of them (except opensnoop) to debug actual problems.
tcpdump and wireshark and opensnoop are also things that you can have on OS X.
A tool that traces system calls. My favorite thing. I have a bunch of posts with examples of how to use it on this blog. If you want to read what I think of it you should read the fanzine reference that you can
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