Viewing file:  pure_eval.py (4.41 KB) -rw-r--r--
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from __future__ import absolute_import
import ast
from sentry_sdk import Hub, serializer
from sentry_sdk._types import MYPY
from sentry_sdk.integrations import Integration, DidNotEnable
from sentry_sdk.scope import add_global_event_processor
from sentry_sdk.utils import walk_exception_chain, iter_stacks
if MYPY:
from typing import Optional, Dict, Any, Tuple, List
from types import FrameType
from sentry_sdk._types import Event, Hint
try:
import executing
except ImportError:
raise DidNotEnable("executing is not installed")
try:
import pure_eval
except ImportError:
raise DidNotEnable("pure_eval is not installed")
try:
# Used implicitly, just testing it's available
import asttokens # noqa
except ImportError:
raise DidNotEnable("asttokens is not installed")
class PureEvalIntegration(Integration):
identifier = "pure_eval"
@staticmethod
def setup_once():
# type: () -> None
@add_global_event_processor
def add_executing_info(event, hint):
# type: (Event, Optional[Hint]) -> Optional[Event]
if Hub.current.get_integration(PureEvalIntegration) is None:
return event
if hint is None:
return event
exc_info = hint.get("exc_info", None)
if exc_info is None:
return event
exception = event.get("exception", None)
if exception is None:
return event
values = exception.get("values", None)
if values is None:
return event
for exception, (_exc_type, _exc_value, exc_tb) in zip(
reversed(values), walk_exception_chain(exc_info)
):
sentry_frames = [
frame
for frame in exception.get("stacktrace", {}).get("frames", [])
if frame.get("function")
]
tbs = list(iter_stacks(exc_tb))
if len(sentry_frames) != len(tbs):
continue
for sentry_frame, tb in zip(sentry_frames, tbs):
sentry_frame["vars"] = (
pure_eval_frame(tb.tb_frame) or sentry_frame["vars"]
)
return event
def pure_eval_frame(frame):
# type: (FrameType) -> Dict[str, Any]
source = executing.Source.for_frame(frame)
if not source.tree:
return {}
statements = source.statements_at_line(frame.f_lineno)
if not statements:
return {}
scope = stmt = list(statements)[0]
while True:
# Get the parent first in case the original statement is already
# a function definition, e.g. if we're calling a decorator
# In that case we still want the surrounding scope, not that function
scope = scope.parent
if isinstance(scope, (ast.FunctionDef, ast.ClassDef, ast.Module)):
break
evaluator = pure_eval.Evaluator.from_frame(frame)
expressions = evaluator.interesting_expressions_grouped(scope)
def closeness(expression):
# type: (Tuple[List[Any], Any]) -> Tuple[int, int]
# Prioritise expressions with a node closer to the statement executed
# without being after that statement
# A higher return value is better - the expression will appear
# earlier in the list of values and is less likely to be trimmed
nodes, _value = expression
def start(n):
# type: (ast.expr) -> Tuple[int, int]
return (n.lineno, n.col_offset)
nodes_before_stmt = [
node for node in nodes if start(node) < stmt.last_token.end
]
if nodes_before_stmt:
# The position of the last node before or in the statement
return max(start(node) for node in nodes_before_stmt)
else:
# The position of the first node after the statement
# Negative means it's always lower priority than nodes that come before
# Less negative means closer to the statement and higher priority
lineno, col_offset = min(start(node) for node in nodes)
return (-lineno, -col_offset)
# This adds the first_token and last_token attributes to nodes
atok = source.asttokens()
expressions.sort(key=closeness, reverse=True)
return {
atok.get_text(nodes[0]): value
for nodes, value in expressions[: serializer.MAX_DATABAG_BREADTH]
}
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