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44343769f8
Summary: We want to rename away from "mercurial". Rather than rename the "mercurial" Python package, we opted to just collapse it into the parent "edenscm" package. This is also a step towards further organizing we want to do around the new project name. To ease the transition wrt hotfixes, we now replace "edenscm.mercurial" with "mercurial" to fix imports within base64-python extensions. Reviewed By: sggutier Differential Revision: D38943169 fbshipit-source-id: 03fa18079c51e2f7fac05d65b127095da3ab7c99
95 lines
2.4 KiB
Python
95 lines
2.4 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2.
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# perftrace.py - Module for tracing performance
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import inspect
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import threading
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from contextlib import contextmanager
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from bindings import tracing
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from . import util
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# Native tracing utilities
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tracer = util.tracer
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threadlocal = threading.local()
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def editspan(
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meta,
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_edit=tracer.edit,
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_currentframe=inspect.currentframe,
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_wrapfunc=tracing.wrapfunc,
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_spanid=tracing.wrapfunc.spanid,
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):
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"""Edit the current native span. meta: [(key, value)]"""
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stack = threadlocal.__dict__.get("stack", [])
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if not stack:
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return
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spanid = stack[-1]
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_edit(spanid, meta)
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# PerfTrace wrappers
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@contextmanager
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def trace(name):
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spanid = tracer.span([("name", name), ("cat", "perftrace")])
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threadlocal.__dict__.setdefault("stack", []).append(spanid)
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tracer.enter(spanid)
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try:
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yield
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finally:
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tracer.exit(spanid)
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threadlocal.stack.pop()
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def traceflag(flagname):
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"""Records the given flag name as being associated with the latest trace
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point."""
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# XXX: No multi-flag support for now.
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editspan([("%s" % flagname, "true")])
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def tracevalue(name, value):
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"""Records the given name=value as being associated with the latest trace
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point. This will overwrite any previous value with that name."""
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editspan([(name, str(value))])
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def tracebytes(name, value):
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"""Records the given name=value as being associated with the latest trace
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point. The value is treated as bytes and will be added to any previous value
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set to the same name."""
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# XXX: Rust tracing does not do an addition - But there do not seem to be
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# any users relying on the behavior.
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editspan([(name, str(value))])
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def tracefunc(name):
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"""Decorator that indicates this entire function should be wrapped in a
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trace."""
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def wrapper(func):
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func.meta = [("name", name), ("cat", "perftrace")]
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if util.istest():
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func.meta.append(("line", "_"))
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func.isperftrace = True
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def pushspan(spanid):
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threadlocal.__dict__.setdefault("stack", []).append(spanid)
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def popspan():
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threadlocal.__dict__.setdefault("stack", []).pop()
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return tracing.wrapfunc(func, push_callback=pushspan, pop_callback=popspan)
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return wrapper
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