mirror of https://github.com/pybind/pybind11.git
68 lines
2.8 KiB
Python
68 lines
2.8 KiB
Python
# This is not really a unit test, but probing environment/toolchain/platform-specific
|
|
# behavior under the exact same conditions as normal tests.
|
|
# The results are useful to understanding the effects of, e.g., removing
|
|
# `-fvisibility=hidden` or `__attribute__((visibility("hidden")))`, or linking
|
|
# extensions statically with the core Python interpreter.
|
|
|
|
# NOTE
|
|
# ====
|
|
# The "exc_" in "test_exc_namespace_visibility.py" is a workaround, to avoid a
|
|
# test_cross_module_exception_translator (test_exceptions.py) failure. This
|
|
# test has to be imported (by pytest) before test_exceptions.py; pytest sorts
|
|
# lexically. See https://github.com/pybind/pybind11/pull/4054 for more information.
|
|
|
|
import itertools
|
|
|
|
import namespace_visibility_1
|
|
import namespace_visibility_2
|
|
import pytest
|
|
|
|
# Please take a quick look at namespace_visibility.h first, to see what is being probed.
|
|
#
|
|
# EXPECTED is for -fvisibility=hidden or equivalent, as recommended in the docs.
|
|
EXPECTED_ALL_UNIQUE_POINTERS_OBSERVED = "AAC:AAc:AaC:Aac:aAC:aAc:aaC:aac"
|
|
# ^^^
|
|
# namespace_visibility_1 pointer|||
|
|
# namespace_visibility_1.submodule pointer|| (identical letters means same pointer)
|
|
# namespace_visibility_2 pointer|
|
|
# Upper-case: namespace visibility unspecified
|
|
# Lower-case: namespace visibility hidden
|
|
# This test probes all 2**3 combinations of u/h ** number-of-sub/modules.
|
|
#
|
|
# Also observed:
|
|
# AAA:AAc:AaC:Aac:aAC:aAc:aaC:aac -fvisibility=default Linux
|
|
# AAA:AAc:AaA:Aac:aAC:aAc:aaC:aac -fvisibility=default macOS
|
|
# AAA:AAa:AaA:Aaa:aAA:aAa:aaA:aaa everything linked statically
|
|
|
|
|
|
def test_namespace_visibility():
|
|
modules = (
|
|
namespace_visibility_1,
|
|
namespace_visibility_1.submodule,
|
|
namespace_visibility_2,
|
|
)
|
|
unique_pointer_labels = "ABC"
|
|
unique_pointers_observed = []
|
|
# u = visibility unspecified
|
|
# h = visibility hidden
|
|
for visibility in itertools.product(*([("u", "h")] * len(modules))):
|
|
# See functions in namespace_visibility_*.cpp
|
|
func = "ns_vis_" + "".join(visibility) + "_func"
|
|
ptrs = []
|
|
uq_ptrs_obs = ""
|
|
for vis, m in zip(visibility, modules):
|
|
ptr = getattr(m, func)()
|
|
ptrs.append(ptr)
|
|
lbl = unique_pointer_labels[ptrs.index(ptr)]
|
|
if vis == "h":
|
|
# Encode u/h info as upper/lower case to make the final result
|
|
# as compact as possible.
|
|
lbl = lbl.lower()
|
|
uq_ptrs_obs += lbl
|
|
unique_pointers_observed.append(uq_ptrs_obs)
|
|
all_unique_pointers_observed = ":".join(unique_pointers_observed)
|
|
if all_unique_pointers_observed != EXPECTED_ALL_UNIQUE_POINTERS_OBSERVED:
|
|
pytest.skip(
|
|
f"UNUSUAL all_unique_pointers_observed: {all_unique_pointers_observed}"
|
|
)
|