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f137f75ab8
it deals correctly with some anomalous cases; according to this test
suite I've fixed it right.
The anomalous cases had to do with 'exception' events: these aren't
generated when they would be most helpful, and the profiler has to
work hard to recover the right information. The problems occur when C
code (such as hasattr(), which is used as the example here) calls back
into Python code and clears an exception raised by that Python code.
Consider this example:
def foo():
hasattr(obj, "bar")
Where obj is an instance from a class like this:
class C:
def __getattr__(self, name):
raise AttributeError
The profiler sees the following sequence of events:
call (foo)
call (__getattr__)
exception (in __getattr__)
return (from foo)
Previously, the profiler would assume the return event returned from
__getattr__. An if statement checking for this condition and raising
an exception was commented out... This version does the right thing.
17 lines
810 B
Text
17 lines
810 B
Text
test_profile
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53 function calls in 1.000 CPU seconds
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Ordered by: standard name
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ncalls tottime percall cumtime percall filename:lineno(function)
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1 0.000 0.000 1.000 1.000 <string>:1(?)
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0 0.000 0.000 profile:0(profiler)
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1 0.000 0.000 1.000 1.000 profile:0(testfunc())
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1 0.400 0.400 1.000 1.000 test_profile.py:21(testfunc)
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2 0.080 0.040 0.600 0.300 test_profile.py:30(helper)
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4 0.116 0.029 0.120 0.030 test_profile.py:48(helper1)
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8 0.312 0.039 0.400 0.050 test_profile.py:56(helper2)
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8 0.064 0.008 0.080 0.010 test_profile.py:66(subhelper)
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28 0.028 0.001 0.028 0.001 test_profile.py:78(__getattr__)
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