def RetrieveStackTrace(self, inspector_client=None):
"""Retrieves the creation stack trace and stores it into this LeakNode.
Args:
inspector_client: RemoteInspectorClient, client to use for retrieving the
full stack trace. If None, we will retrieve a possibly shortened value
from the snapshot.
"""
stack = None
if not self._stacktrace_suffix:
# No stack trace information.
self.stack = stacktrace.Stack('')
return
if inspector_client:
# The heap snapshot contains only the first 1000 characters of each
# string. As we store the creation stack trace in objects as strings, we
# will need to evaluate this string using the remote inspector client to
# get the full stack trace.
stack = inspector_client.EvaluateJavaScript(
self.how_to_find_node + self._stacktrace_suffix)
else:
# See if the object contains a stack trace.
for edge in self.node.edges_from:
if edge.name_string == self._stacktrace_suffix:
stack = edge.to_node.string
break
if stack:
self.stack = stacktrace.Stack(stack)
def testUnknown(self):
data = textwrap.dedent("""some data
across a
few lines""")
stack = stacktrace.Stack(data)
self.assertEqual(stacktrace.Stack.UNKNOWN, stack.vm)
self.assertEqual(data.split('\n'), stack.frames)
def testV8Stack(self):
v8_trace = """Error
at frame (some file:42:1)
at eval at <anonymous>
at [object Object].function (unknown source)"""
stack = stacktrace.Stack(v8_trace)
self.assertEqual(stacktrace.Stack.V8, stack.vm)
self.assertEqual(3, len(stack.frames))
self.assertEqual('frame', stack.frames[0])
self.assertEqual('eval at <anonymous>', stack.frames[1])
self.assertEqual('[object Object].function', stack.frames[2])
def testJSCStack(self):
jsc_trace = """--> Stack trace:
0 frame@somefile:42
1 @eval code
2 map@[native code]"""
stack = stacktrace.Stack(jsc_trace)
self.assertEqual(stacktrace.Stack.JSC, stack.vm)
self.assertEqual(3, len(stack.frames))
self.assertEqual('frame', stack.frames[0])
self.assertEqual('*', stack.frames[1])
self.assertEqual('map', stack.frames[2])
def _ParseJSCFrame(self, frame):
return stacktrace.Stack('--> Stack trace:\n%s' % frame).frames[0]
def _ParseV8Frame(self, frame):
return stacktrace.Stack('Error\n%s' % frame).frames[0]