--- a/DebugClients/Python/coverage/pytracer.py Fri Sep 02 19:08:02 2016 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,158 +0,0 @@
-# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
-# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt
-
-"""Raw data collector for coverage.py."""
-
-import dis
-import sys
-
-from coverage import env
-
-# We need the YIELD_VALUE opcode below, in a comparison-friendly form.
-YIELD_VALUE = dis.opmap['YIELD_VALUE']
-if env.PY2:
- YIELD_VALUE = chr(YIELD_VALUE)
-
-
-class PyTracer(object):
- """Python implementation of the raw data tracer."""
-
- # Because of poor implementations of trace-function-manipulating tools,
- # the Python trace function must be kept very simple. In particular, there
- # must be only one function ever set as the trace function, both through
- # sys.settrace, and as the return value from the trace function. Put
- # another way, the trace function must always return itself. It cannot
- # swap in other functions, or return None to avoid tracing a particular
- # frame.
- #
- # The trace manipulator that introduced this restriction is DecoratorTools,
- # which sets a trace function, and then later restores the pre-existing one
- # by calling sys.settrace with a function it found in the current frame.
- #
- # Systems that use DecoratorTools (or similar trace manipulations) must use
- # PyTracer to get accurate results. The command-line --timid argument is
- # used to force the use of this tracer.
-
- def __init__(self):
- # Attributes set from the collector:
- self.data = None
- self.trace_arcs = False
- self.should_trace = None
- self.should_trace_cache = None
- self.warn = None
- # The threading module to use, if any.
- self.threading = None
-
- self.cur_file_dict = []
- self.last_line = [0]
-
- self.data_stack = []
- self.last_exc_back = None
- self.last_exc_firstlineno = 0
- self.thread = None
- self.stopped = False
-
- def __repr__(self):
- return "<PyTracer at 0x{0:0x}: {1} lines in {2} files>".format(
- id(self),
- sum(len(v) for v in self.data.values()),
- len(self.data),
- )
-
- def _trace(self, frame, event, arg_unused):
- """The trace function passed to sys.settrace."""
-
- if self.stopped:
- return
-
- if self.last_exc_back:
- if frame == self.last_exc_back:
- # Someone forgot a return event.
- if self.trace_arcs and self.cur_file_dict:
- pair = (self.last_line, -self.last_exc_firstlineno)
- self.cur_file_dict[pair] = None
- self.cur_file_dict, self.last_line = self.data_stack.pop()
- self.last_exc_back = None
-
- if event == 'call':
- # Entering a new function context. Decide if we should trace
- # in this file.
- self.data_stack.append((self.cur_file_dict, self.last_line))
- filename = frame.f_code.co_filename
- disp = self.should_trace_cache.get(filename)
- if disp is None:
- disp = self.should_trace(filename, frame)
- self.should_trace_cache[filename] = disp
-
- self.cur_file_dict = None
- if disp.trace:
- tracename = disp.source_filename
- if tracename not in self.data:
- self.data[tracename] = {}
- self.cur_file_dict = self.data[tracename]
- # The call event is really a "start frame" event, and happens for
- # function calls and re-entering generators. The f_lasti field is
- # -1 for calls, and a real offset for generators. Use <0 as the
- # line number for calls, and the real line number for generators.
- if frame.f_lasti < 0:
- self.last_line = -frame.f_code.co_firstlineno
- else:
- self.last_line = frame.f_lineno
- elif event == 'line':
- # Record an executed line.
- if self.cur_file_dict is not None:
- lineno = frame.f_lineno
- if self.trace_arcs:
- self.cur_file_dict[(self.last_line, lineno)] = None
- else:
- self.cur_file_dict[lineno] = None
- self.last_line = lineno
- elif event == 'return':
- if self.trace_arcs and self.cur_file_dict:
- # Record an arc leaving the function, but beware that a
- # "return" event might just mean yielding from a generator.
- bytecode = frame.f_code.co_code[frame.f_lasti]
- if bytecode != YIELD_VALUE:
- first = frame.f_code.co_firstlineno
- self.cur_file_dict[(self.last_line, -first)] = None
- # Leaving this function, pop the filename stack.
- self.cur_file_dict, self.last_line = self.data_stack.pop()
- elif event == 'exception':
- self.last_exc_back = frame.f_back
- self.last_exc_firstlineno = frame.f_code.co_firstlineno
- return self._trace
-
- def start(self):
- """Start this Tracer.
-
- Return a Python function suitable for use with sys.settrace().
-
- """
- if self.threading:
- self.thread = self.threading.currentThread()
- sys.settrace(self._trace)
- self.stopped = False
- return self._trace
-
- def stop(self):
- """Stop this Tracer."""
- self.stopped = True
- if self.threading and self.thread.ident != self.threading.currentThread().ident:
- # Called on a different thread than started us: we can't unhook
- # ourselves, but we've set the flag that we should stop, so we
- # won't do any more tracing.
- return
-
- if self.warn:
- if sys.gettrace() != self._trace:
- msg = "Trace function changed, measurement is likely wrong: %r"
- self.warn(msg % (sys.gettrace(),))
-
- sys.settrace(None)
-
- def get_stats(self):
- """Return a dictionary of statistics, or None."""
- return None
-
-#
-# eflag: FileType = Python2
