70 lines
2.2 KiB
Python
70 lines
2.2 KiB
Python
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# -*- coding: utf-8 -
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#
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# This file is part of gunicorn released under the MIT license.
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# See the NOTICE for more information.
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"""The debug module contains utilities and functions for better
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debugging Gunicorn."""
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import sys
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import linecache
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import re
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import inspect
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__all__ = ['spew', 'unspew']
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_token_spliter = re.compile(r'\W+')
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class Spew(object):
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def __init__(self, trace_names=None, show_values=True):
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self.trace_names = trace_names
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self.show_values = show_values
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def __call__(self, frame, event, arg):
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if event == 'line':
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lineno = frame.f_lineno
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if '__file__' in frame.f_globals:
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filename = frame.f_globals['__file__']
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if (filename.endswith('.pyc') or
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filename.endswith('.pyo')):
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filename = filename[:-1]
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name = frame.f_globals['__name__']
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line = linecache.getline(filename, lineno)
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else:
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name = '[unknown]'
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try:
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src = inspect.getsourcelines(frame)
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line = src[lineno]
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except IOError:
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line = 'Unknown code named [%s]. VM instruction #%d' % (
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frame.f_code.co_name, frame.f_lasti)
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if self.trace_names is None or name in self.trace_names:
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print('%s:%s: %s' % (name, lineno, line.rstrip()))
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if not self.show_values:
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return self
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details = []
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tokens = _token_spliter.split(line)
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for tok in tokens:
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if tok in frame.f_globals:
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details.append('%s=%r' % (tok, frame.f_globals[tok]))
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if tok in frame.f_locals:
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details.append('%s=%r' % (tok, frame.f_locals[tok]))
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if details:
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print("\t%s" % ' '.join(details))
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return self
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def spew(trace_names=None, show_values=False):
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"""Install a trace hook which writes incredibly detailed logs
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about what code is being executed to stdout.
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"""
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sys.settrace(Spew(trace_names, show_values))
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def unspew():
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"""Remove the trace hook installed by spew.
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"""
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sys.settrace(None)
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