Changed code to support older Python versions

venv/lib/python3.11/site-packages/sentry_sdk/profiler/utils.py

@@ -0,0 +1,195 @@
+import os
+from collections import deque
+
+from sentry_sdk._compat import PY311
+from sentry_sdk.utils import filename_for_module
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from sentry_sdk._lru_cache import LRUCache
+    from types import FrameType
+    from typing import Deque
+    from typing import List
+    from typing import Optional
+    from typing import Sequence
+    from typing import Tuple
+    from typing_extensions import TypedDict
+
+    ThreadId = str
+
+    ProcessedStack = List[int]
+
+    ProcessedFrame = TypedDict(
+        "ProcessedFrame",
+        {
+            "abs_path": str,
+            "filename": Optional[str],
+            "function": str,
+            "lineno": int,
+            "module": Optional[str],
+        },
+    )
+
+    ProcessedThreadMetadata = TypedDict(
+        "ProcessedThreadMetadata",
+        {"name": str},
+    )
+
+    FrameId = Tuple[
+        str,  # abs_path
+        int,  # lineno
+        str,  # function
+    ]
+    FrameIds = Tuple[FrameId, ...]
+
+    # The exact value of this id is not very meaningful. The purpose
+    # of this id is to give us a compact and unique identifier for a
+    # raw stack that can be used as a key to a dictionary so that it
+    # can be used during the sampled format generation.
+    StackId = Tuple[int, int]
+
+    ExtractedStack = Tuple[StackId, FrameIds, List[ProcessedFrame]]
+    ExtractedSample = Sequence[Tuple[ThreadId, ExtractedStack]]
+
+# The default sampling frequency to use. This is set at 101 in order to
+# mitigate the effects of lockstep sampling.
+DEFAULT_SAMPLING_FREQUENCY = 101
+
+
+# We want to impose a stack depth limit so that samples aren't too large.
+MAX_STACK_DEPTH = 128
+
+
+if PY311:
+
+    def get_frame_name(frame):
+        # type: (FrameType) -> str
+        return frame.f_code.co_qualname
+
+else:
+
+    def get_frame_name(frame):
+        # type: (FrameType) -> str
+
+        f_code = frame.f_code
+        co_varnames = f_code.co_varnames
+
+        # co_name only contains the frame name.  If the frame was a method,
+        # the class name will NOT be included.
+        name = f_code.co_name
+
+        # if it was a method, we can get the class name by inspecting
+        # the f_locals for the `self` argument
+        try:
+            if (
+                # the co_varnames start with the frame's positional arguments
+                # and we expect the first to be `self` if its an instance method
+                co_varnames and co_varnames[0] == "self" and "self" in frame.f_locals
+            ):
+                for cls in type(frame.f_locals["self"]).__mro__:
+                    if name in cls.__dict__:
+                        return "{}.{}".format(cls.__name__, name)
+        except (AttributeError, ValueError):
+            pass
+
+        # if it was a class method, (decorated with `@classmethod`)
+        # we can get the class name by inspecting the f_locals for the `cls` argument
+        try:
+            if (
+                # the co_varnames start with the frame's positional arguments
+                # and we expect the first to be `cls` if its a class method
+                co_varnames and co_varnames[0] == "cls" and "cls" in frame.f_locals
+            ):
+                for cls in frame.f_locals["cls"].__mro__:
+                    if name in cls.__dict__:
+                        return "{}.{}".format(cls.__name__, name)
+        except (AttributeError, ValueError):
+            pass
+
+        # nothing we can do if it is a staticmethod (decorated with @staticmethod)
+
+        # we've done all we can, time to give up and return what we have
+        return name
+
+
+def frame_id(raw_frame):
+    # type: (FrameType) -> FrameId
+    return (raw_frame.f_code.co_filename, raw_frame.f_lineno, get_frame_name(raw_frame))
+
+
+def extract_frame(fid, raw_frame, cwd):
+    # type: (FrameId, FrameType, str) -> ProcessedFrame
+    abs_path = raw_frame.f_code.co_filename
+
+    try:
+        module = raw_frame.f_globals["__name__"]
+    except Exception:
+        module = None
+
+    # namedtuples can be many times slower when initialing
+    # and accessing attribute so we opt to use a tuple here instead
+    return {
+        # This originally was `os.path.abspath(abs_path)` but that had
+        # a large performance overhead.
+        #
+        # According to docs, this is equivalent to
+        # `os.path.normpath(os.path.join(os.getcwd(), path))`.
+        # The `os.getcwd()` call is slow here, so we precompute it.
+        #
+        # Additionally, since we are using normalized path already,
+        # we skip calling `os.path.normpath` entirely.
+        "abs_path": os.path.join(cwd, abs_path),
+        "module": module,
+        "filename": filename_for_module(module, abs_path) or None,
+        "function": fid[2],
+        "lineno": raw_frame.f_lineno,
+    }
+
+
+def extract_stack(
+    raw_frame,  # type: Optional[FrameType]
+    cache,  # type: LRUCache
+    cwd,  # type: str
+    max_stack_depth=MAX_STACK_DEPTH,  # type: int
+):
+    # type: (...) -> ExtractedStack
+    """
+    Extracts the stack starting the specified frame. The extracted stack
+    assumes the specified frame is the top of the stack, and works back
+    to the bottom of the stack.
+
+    In the event that the stack is more than `MAX_STACK_DEPTH` frames deep,
+    only the first `MAX_STACK_DEPTH` frames will be returned.
+    """
+
+    raw_frames = deque(maxlen=max_stack_depth)  # type: Deque[FrameType]
+
+    while raw_frame is not None:
+        f_back = raw_frame.f_back
+        raw_frames.append(raw_frame)
+        raw_frame = f_back
+
+    frame_ids = tuple(frame_id(raw_frame) for raw_frame in raw_frames)
+    frames = []
+    for i, fid in enumerate(frame_ids):
+        frame = cache.get(fid)
+        if frame is None:
+            frame = extract_frame(fid, raw_frames[i], cwd)
+            cache.set(fid, frame)
+        frames.append(frame)
+
+    # Instead of mapping the stack into frame ids and hashing
+    # that as a tuple, we can directly hash the stack.
+    # This saves us from having to generate yet another list.
+    # Additionally, using the stack as the key directly is
+    # costly because the stack can be large, so we pre-hash
+    # the stack, and use the hash as the key as this will be
+    # needed a few times to improve performance.
+    #
+    # To Reduce the likelihood of hash collisions, we include
+    # the stack depth. This means that only stacks of the same
+    # depth can suffer from hash collisions.
+    stack_id = len(raw_frames), hash(frame_ids)
+
+    return stack_id, frame_ids, frames