Source code for linkcheck.trace

# Copyright (C) 2000-2014 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import re
import linecache
import time
import sys
import threading

# tracing
_trace_ignore = set()
_trace_filter = set()


[docs]def trace_ignore(names): """Add given names to trace ignore set, or clear set if names is None.""" if names is None: _trace_ignore.clear() else: _trace_ignore.update(names)
[docs]def trace_filter(patterns): """Add given patterns to trace filter set or clear set if patterns is None.""" if patterns is None: _trace_filter.clear() else: _trace_filter.update(re.compile(pat) for pat in patterns)
def _trace(frame, event, arg): """Trace function calls.""" if event in ('call', 'c_call'): _trace_line(frame, event, arg) elif event in ('return', 'c_return'): _trace_line(frame, event, arg) print(" return:", arg) # elif event in ('exception', 'c_exception'): # _trace_line(frame, event, arg) return _trace def _trace_full(frame, event, arg): """Trace every executed line.""" if event == "line": _trace_line(frame, event, arg) else: _trace(frame, event, arg) return _trace_full def _trace_line(frame, event, arg): """Print current executed line.""" name = frame.f_globals["__name__"] if name in _trace_ignore: return _trace_line for pat in _trace_filter: if not pat.match(name): return _trace_line lineno = frame.f_lineno filename = frame.f_globals["__file__"] if filename.endswith((".pyc", ".pyo")): filename = filename[:-1] line = linecache.getline(filename, lineno) currentThread = threading.currentThread() tid = currentThread.ident tname = currentThread.name args = (tid, tname, time.time(), line.rstrip(), name, lineno) print("THREAD(%d) %r %.2f %s # %s:%d" % args)
[docs]def trace_on(full=False): """Start tracing of the current thread (and the current thread only).""" if full: sys.settrace(_trace_full) else: sys.settrace(_trace)
[docs]def trace_off(): """Stop tracing of the current thread (and the current thread only).""" sys.settrace(None)