mirror of
https://gitlab.freedesktop.org/xorg/xserver.git
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9ad275a8f1
This is the easiest way to notify users that it just won't run as-is. Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2213>
339 lines
11 KiB
Python
339 lines
11 KiB
Python
# SPDX-License-Identifier: MIT
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#
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# pytest configuration and fixtures for X server testing.
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import os
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import shutil
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import pytest
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from pathlib import Path
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from xserver import ExternalXServer, XServerProcess
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from xclient import RawX11Connection, X11ConnectionError, XlibConnection
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def pytest_addoption(parser):
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parser.addoption(
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"--valgrind",
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action="store_true",
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default=False,
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help="Run X server under valgrind memcheck",
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)
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parser.addoption(
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"--valgrind-suppressions",
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default=None,
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help="Path to valgrind suppressions file",
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)
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parser.addoption(
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"--server-type",
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action="append",
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default=[],
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help="Server types to test (xvfb, xwayland, xorg). "
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"Can be specified multiple times. Default: xvfb",
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)
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parser.addoption(
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"--server-path", default=None, help="Explicit path to the X server binary"
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)
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parser.addoption(
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"--display",
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default=None,
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help="Connect to an existing X server instead of starting one. "
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"Value is a display number or :N string (e.g. '42' or ':42'). "
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"Optionally combine with --server-type to declare the server type "
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"for marker-based test filtering.",
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)
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def pytest_configure(config):
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config.addinivalue_line(
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"markers", "valgrind: mark test as requiring valgrind to detect the issue"
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)
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config.addinivalue_line(
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"markers",
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"asan: mark test as requiring AddressSanitizer to detect the issue",
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)
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config.addinivalue_line(
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"markers", "xwayland_only: mark test as only applicable to Xwayland"
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)
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config.addinivalue_line(
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"markers", "xorg_only: mark test as only applicable to Xorg"
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)
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config.addinivalue_line(
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"markers", "swapped_client: mark test as requiring a byte-swapped client"
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)
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# Validate --display against conflicting options
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display = config.getoption("--display", default=None)
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if display is not None:
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if config.getoption("--valgrind"):
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raise pytest.UsageError("--display and --valgrind are mutually exclusive")
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if config.getoption("--server-path"):
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raise pytest.UsageError(
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"--display and --server-path are mutually exclusive"
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)
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def _parse_display(value):
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"""Parse a display string like ':42' or '42' into an integer."""
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value = value.strip().lstrip(":")
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try:
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return int(value)
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except ValueError:
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raise pytest.UsageError(f"Invalid display value: {value!r}")
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def get_server_types(config) -> list[str]:
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"""Get the list of server types to test.
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With ``--display``, defaults to ``["external"]`` if no explicit
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``--server-type`` is given. Otherwise defaults to ``["xvfb"]``.
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"""
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types = config.getoption("--server-type") or []
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if config.getoption("--display", default=None) is not None:
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return types or ["external"]
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return types or ["xvfb"]
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def get_valgrind_suppressions(config) -> Path | None:
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"""Find the valgrind suppressions file."""
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explicit = config.getoption("--valgrind-suppressions")
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if explicit:
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return Path(explicit)
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env = os.environ.get("VALGRIND_SUPPRESSIONS")
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if env:
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f = Path(env)
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if f.is_file():
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return f
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# Try next to this file (test/pyxtest/valgrind.suppressions)
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default = Path(__file__).resolve().parent / "valgrind.suppressions"
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if default.is_file():
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return default
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return None
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def is_valgrind_available() -> bool:
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"""Check if valgrind is available on the system."""
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return shutil.which("valgrind") is not None
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def is_asan_build() -> bool:
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"""Check if the X server binary was built with AddressSanitizer.
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This is determined by the ``XSERVER_ASAN`` environment variable
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which is set by meson when ``-Db_sanitize=address`` is used.
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It can also be set manually when running pytest directly.
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"""
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return os.environ.get("XSERVER_ASAN") == "1"
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def pytest_collection_modifyitems(config, items):
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"""Skip tests based on markers and configuration."""
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server_types = get_server_types(config)
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asan = is_asan_build()
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for item in items:
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if item.get_closest_marker("xwayland_only") and "xwayland" not in server_types:
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item.add_marker(pytest.mark.skip(reason="Test only applies to Xwayland"))
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if item.get_closest_marker("xorg_only") and "xorg" not in server_types:
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item.add_marker(pytest.mark.skip(reason="Test only applies to Xorg"))
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if item.get_closest_marker("asan") and not asan:
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item.add_marker(
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pytest.mark.skip(
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reason="Test requires ASAN build (XSERVER_ASAN=1 not set)"
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)
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)
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if item.get_closest_marker("valgrind") and asan:
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item.add_marker(
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pytest.mark.skip(
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reason="Test requires valgrind, incompatible with ASAN build"
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)
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)
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def pytest_generate_tests(metafunc):
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"""Parametrize tests that use the xserver fixture over all configured
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server types so each test runs once per type."""
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if "xserver" in metafunc.fixturenames:
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server_types = get_server_types(metafunc.config)
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metafunc.parametrize("xserver", server_types, indirect=True)
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def _start_server(request, server_type, log_file=None):
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"""Start an X server of the given type for a test.
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Shared implementation for the xvfb, xwayland, xorg, and generic
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xserver fixtures. Valgrind is enabled if the test is marked with
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``@pytest.mark.valgrind`` or if ``--valgrind`` is passed on the
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command line. ASAN is enabled automatically when ``XSERVER_ASAN=1``
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is set in the environment (typically by meson when the server is
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built with ``-Db_sanitize=address``).
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"""
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if server_type == "xorg" and os.geteuid() != 0:
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pytest.skip("Xorg requires root to access /dev/tty0 and GPU devices")
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use_valgrind = (
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request.config.getoption("--valgrind")
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or request.node.get_closest_marker("valgrind") is not None
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)
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if use_valgrind and not is_valgrind_available():
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pytest.skip("valgrind not available")
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use_asan = is_asan_build()
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server_path = request.config.getoption("--server-path")
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suppressions = get_valgrind_suppressions(request.config)
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server = XServerProcess(
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server_type=server_type,
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valgrind=use_valgrind,
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valgrind_suppressions=suppressions,
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asan=use_asan,
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server_path=server_path,
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log_file=log_file,
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)
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try:
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server.start(timeout=60 if use_valgrind else 15)
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except (FileNotFoundError, RuntimeError) as e:
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msg = f"Failed to start {server_type} server: {e}"
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if server.log_file:
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msg += f"\nLog file: {server.log_file}"
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pytest.fail(msg)
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yield server
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# Check if the server was killed by ASAN before we stop it
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asan_errors = []
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if use_asan and not server.is_alive:
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asan_errors = server.get_asan_errors()
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valgrind_errors = server.stop()
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if use_asan and asan_errors:
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msg = f"AddressSanitizer found {len(asan_errors)} error(s):\n\n"
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msg += "\n\n".join(str(e) for e in asan_errors)
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pytest.fail(msg)
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if use_valgrind and valgrind_errors:
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serious = [
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e
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for e in valgrind_errors
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if e.kind
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not in (
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"Leak_DefinitelyLost",
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"Leak_PossiblyLost",
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"Leak_StillReachable",
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"Leak_IndirectlyLost",
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"SyscallParam",
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)
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]
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if serious:
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msg = f"Valgrind found {len(serious)} memory error(s):\n\n"
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msg += "\n\n".join(str(e) for e in serious)
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pytest.fail(msg)
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@pytest.fixture
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def xserver(request, tmp_path):
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"""
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Start an X server for this test.
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Automatically parametrized via ``pytest_generate_tests`` so every
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test that uses this fixture runs once per configured --server-type.
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A fresh server per test, killed afterward. With --valgrind,
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valgrind memory errors cause test failure during teardown.
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When ``--display`` is given, no server is started; an
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:class:`ExternalXServer` proxy is yielded instead.
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For a fixture that targets a specific server type use the xvfb,
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xwayland, or xorg fixtures instead.
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"""
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server_type = request.param
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# Skip server-specific markers
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if request.node.get_closest_marker("xwayland_only") and server_type != "xwayland":
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pytest.skip("Test only applies to Xwayland")
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if request.node.get_closest_marker("xorg_only") and server_type != "xorg":
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pytest.skip("Test only applies to Xorg")
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# External server mode: no server lifecycle management
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display = request.config.getoption("--display")
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if display is not None:
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display_num = _parse_display(display)
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yield ExternalXServer(display_num, server_type=server_type)
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return
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kwargs = {}
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if server_type == "xorg":
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kwargs["log_file"] = tmp_path / f"{server_type}.log"
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yield from _start_server(request, server_type, **kwargs)
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@pytest.fixture
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def xvfb(request, tmp_path):
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"""Start an Xvfb server for this test."""
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display = request.config.getoption("--display")
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if display is not None:
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yield ExternalXServer(_parse_display(display), server_type="xvfb")
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return
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if "xvfb" not in get_server_types(request.config):
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pytest.skip("Xvfb not in --server-type list")
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yield from _start_server(request, "xvfb")
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@pytest.fixture
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def xwayland(request, tmp_path):
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"""Start an Xwayland server for this test."""
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display = request.config.getoption("--display")
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if display is not None:
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yield ExternalXServer(_parse_display(display), server_type="xwayland")
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return
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if "xwayland" not in get_server_types(request.config):
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pytest.skip("Xwayland not in --server-type list")
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yield from _start_server(request, "xwayland")
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@pytest.fixture
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def xorg(request, tmp_path):
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"""Start an Xorg server for this test."""
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display = request.config.getoption("--display")
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if display is not None:
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yield ExternalXServer(_parse_display(display), server_type="xorg")
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return
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if "xorg" not in get_server_types(request.config):
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pytest.skip("Xorg not in --server-type list")
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yield from _start_server(request, "xorg", log_file=tmp_path / "xorg.log")
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@pytest.fixture
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def xclient(xserver):
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"""Create a raw X11 connection to the test server."""
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conn = RawX11Connection(xserver.display_num)
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yield conn
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conn.close()
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@pytest.fixture
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def xclient_swapped(xserver):
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"""Create a big-endian (byte-swapped) X11 connection."""
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try:
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conn = RawX11Connection(xserver.display_num, swapped=True)
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except X11ConnectionError as e:
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if "endian" in str(e).lower():
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pytest.skip("Server does not accept big-endian clients")
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raise
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yield conn
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conn.close()
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@pytest.fixture
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def xlib_client(xserver):
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"""Create a python-xlib connection for higher-level X operations."""
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conn = XlibConnection(xserver.display_num)
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yield conn
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conn.close()
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