STINNER Victor added the comment:

Output of attached profiler_c_code.py example:
---
haypo@selma$ ./python profiler_c_code.py 
(<frame object at 0xf9d788>, 'call', None)
(<frame object at 0xf9d788>, 'return', 'h')
(<frame object at 0xf9d788>, 'call', None)
(<frame object at 0xf9d788>, 'return', 'e')
(<frame object at 0xf9d788>, 'call', None)
(<frame object at 0xf9d788>, 'return', 'l')
(<frame object at 0xf9d788>, 'call', None)
(<frame object at 0xf9d788>, 'return', 'l')
(<frame object at 0xf9d788>, 'call', None)
(<frame object at 0xf9d788>, 'return', 'o')
(<frame object at 0xf9d498>, 'c_call', <built-in function setprofile>)
---

Except of sys.setprofile(), the profiler doesn't see any C calls! list() and 
map() are simply "hidden".

So tools like coverage miss a lot of C call? Again, is it a compromise between 
performance and correctness, or just a regular bug?

----------
Added file: http://bugs.python.org/file46604/profiler_c_code.py

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29502>
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