def _GetTopProject(projects, rank_function=None):
"""Gets the highest ranking class among projects."""
projects = RankByOccurrence(projects, 1, rank_function=rank_function)
if projects:
return projects[0]
logging.warning('ProjectClassifier.Classify: no projects found.')
return None
def Classify(self, results, crash_stack):
top_n_frames = 4
if results:
classes = map(self.GetClassFromSuspect, results[:top_n_frames])
else:
classes = map(self.GetClassFromStackFrame,
crash_stack.frames[:top_n_frames])
class_list = RankByOccurrence(classes, 1)
if class_list:
return class_list[0]
return ''
def ClassifyCallStack(self, stack, top_n_components=2):
"""Classifies component of a crash.
Args:
stack (CallStack): The callstack that caused the crash.
top_n_components (int): The number of top components for the stack,
defaults to 2.
Returns:
List of top n components.
"""
components = map(self.ClassifyStackFrame,
stack.frames[:self.top_n_frames])
return RankByOccurrence(components, top_n_components)
def ClassifySuspects(self, suspects, top_n_components=2):
"""Classifies component of a list of suspects.
Args:
suspects (list of Suspect): Culprit suspects.
top_n_components (int): The number of top components for the stack,
defaults to 2.
Returns:
List of top 2 components.
"""
components = []
for suspect in suspects:
components.extend(self.ClassifySuspect(suspect))
return RankByOccurrence(components, top_n_components,
rank_function=lambda x: -len(x))
def ClassifySuspect(self, suspect, top_n_components=2):
""" Classifies components of a suspect.
Args:
suspect (Suspect): a change log
top_n_components (int): number of components assigned to this suspect,
defaults to 2.
Returns:
List of components
"""
if not suspect or not suspect.changelog:
return None
classify_touched_file_func = functools.partial(self.ClassifyTouchedFile,
suspect.dep_path)
components = map(classify_touched_file_func,
suspect.changelog.touched_files)
return RankByOccurrence(components, top_n_components,
rank_function=lambda x: -len(x))