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#!/usr/bin/env python3
# libpulp - User-space Livepatching Library
#
# Copyright (C) 2020-2025 SUSE Software Solutions GmbH
#
# This file is part of libpulp.
#
# libpulp is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# libpulp is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with libpulp. If not, see <http://www.gnu.org/licenses/>.
import re
import testsuite
import subprocess
import os
import signal
# Make sure we can call libc.so.6 and it doesn't crash.
path_libc = subprocess.check_output(
["gcc", "-print-file-name=libc.so.6"]
).strip()
path_libc = subprocess.check_output(
["realpath", path_libc]
).strip()
if not os.path.exists(path_libc):
raise FileNotFoundError(f"{libc_path} not found")
path_libdl = subprocess.check_output(
["gcc", "-print-file-name=libdl.so.2"]
).strip()
path_libdl = subprocess.check_output(
["realpath", path_libdl]
).strip()
if not os.path.exists(path_libdl):
raise FileNotFoundError(f"{libdl_path} not found")
# Older versions of glibc has a bug where calling libc.so.6 with libdl.so.2
# preloaded causes it to crash. Check if we are in such case.
if path_libdl is not None:
env = {'LD_PRELOAD': path_libdl}
proc = subprocess.Popen(path_libc, stderr=subprocess.STDOUT, env=env)
proc.wait()
if proc.returncode == -signal.SIGSEGV:
# Our glibc has this bug. There is nothing we can do.
exit(77)
# Proceed with the test.
env = {'LD_PRELOAD': testsuite.libpulp_path}
output = subprocess.check_output(path_libc, timeout=5, stderr=subprocess.STDOUT, env=env)
gnu = re.search('GNU C Library', output.decode())
if gnu:
exit(0)
# We tested them all and everything failed.
exit(1)
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