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| author | Ned Batchelder <ned@nedbatchelder.com> | 2019-09-15 07:41:42 -0400 |
|---|---|---|
| committer | Ned Batchelder <ned@nedbatchelder.com> | 2019-09-15 07:41:42 -0400 |
| commit | d8c5066deb9f1b8937103c364e48e7e1b3bcb02c (patch) | |
| tree | ea9577e6c483b7941606c6a0b2a3b5199818de41 /coverage/pytracer.py | |
| parent | 04aac1294977121c0444021bc3ea0e080faf0921 (diff) | |
| download | python-coveragepy-git-d8c5066deb9f1b8937103c364e48e7e1b3bcb02c.tar.gz | |
Python tracer supports dynamic contexts. #846
Diffstat (limited to 'coverage/pytracer.py')
| -rw-r--r-- | coverage/pytracer.py | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/coverage/pytracer.py b/coverage/pytracer.py index e64d7f55..1b9e4d71 100644 --- a/coverage/pytracer.py +++ b/coverage/pytracer.py @@ -40,6 +40,7 @@ class PyTracer(object): self.trace_arcs = False self.should_trace = None self.should_trace_cache = None + self.should_start_context = None self.warn = None # The threading module to use, if any. self.threading = None @@ -47,6 +48,8 @@ class PyTracer(object): self.cur_file_dict = None self.last_line = 0 # int, but uninitialized. self.cur_file_name = None + self.context = None + self.started_context = False self.data_stack = [] self.last_exc_back = None @@ -96,14 +99,35 @@ class PyTracer(object): 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.cur_file_name, self.last_line = self.data_stack.pop() + self.cur_file_dict, self.cur_file_name, self.last_line, self.started_context = ( + self.data_stack.pop() + ) self.last_exc_back = None if event == 'call': - # Entering a new function context. Decide if we should trace + # Should we start a new context? + if self.should_start_context and self.context is None: + context_maybe = self.should_start_context(frame) + if context_maybe is not None: + self.context = context_maybe + self.started_context = True + self.switch_context(self.context) + else: + self.started_context = False + else: + self.started_context = False + + # Entering a new frame. Decide if we should trace # in this file. self._activity = True - self.data_stack.append((self.cur_file_dict, self.cur_file_name, self.last_line)) + self.data_stack.append( + ( + self.cur_file_dict, + self.cur_file_name, + self.last_line, + self.started_context, + ) + ) filename = frame.f_code.co_filename self.cur_file_name = filename disp = self.should_trace_cache.get(filename) @@ -146,7 +170,13 @@ class PyTracer(object): 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.cur_file_name, self.last_line = self.data_stack.pop() + self.cur_file_dict, self.cur_file_name, self.last_line, self.started_context = ( + self.data_stack.pop() + ) + # Leaving a context? + if self.started_context: + self.context = None + self.switch_context(None) elif event == 'exception': self.last_exc_back = frame.f_back self.last_exc_firstlineno = frame.f_code.co_firstlineno |