I have a new blog post at embeddedrelated.com describing heapprof, a 250-line heap profiler (C+Python) working out of the box on Linux, and easy to port/tweak.
How to make a heap profiler
May 23rd, 2014 | software
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May 23rd, 2014 | software
I have a new blog post at embeddedrelated.com describing heapprof, a 250-line heap profiler (C+Python) working out of the box on Linux, and easy to port/tweak.
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72 comments ↓
You can rewrite
reduce(operator.or_, [set(block.stack) for block in blocks])as{x for block in blocks for x in block.stack}which is both shorter and more obvious to understand IMO.Actually, yeah – thanks, changed it.
You seem to have switched the `for`s around. I agree the order you used would be more intuitive, but that's not the python syntax unfortunately:
>>> [a for a in b for b in [[1]]]
Traceback (most recent call last):
File "", line 1, in
NameError: name 'b' is not defined
>>> [a for b in [[1]] for a in b]
[1]
Um, yeah… fixed.
Why do you compile C without optimizations?
Erm… do you ask because there's a bug exposed under -O3 or some such?
This looks cool (and inspires me to take another look at adding backtraces to our memory allocation). One question, though: isn't pulling in threads – and thus possibly a thread-aware standard library, etc. – scary?
If your app doesn't have threads you don't need to worry about it. If it does you already have a thread-aware stdlib etc. – and the code I spent on threading inside the profiler is not that much code. So I don't think it's particularly troublesome.
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