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#!/usr/bin/env python3
# Copyright (c) 2020 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
'''
Test script for symbol-check.py
'''
import subprocess
import unittest
def call_symbol_check(cc, source, executable, options):
subprocess.run([cc,source,'-o',executable] + options, check=True)
p = subprocess.run(['./contrib/devtools/symbol-check.py',executable], stdout=subprocess.PIPE, universal_newlines=True)
return (p.returncode, p.stdout.rstrip())
def get_machine(cc):
p = subprocess.run([cc,'-dumpmachine'], stdout=subprocess.PIPE, universal_newlines=True)
return p.stdout.rstrip()
class TestSymbolChecks(unittest.TestCase):
def test_ELF(self):
source = 'test1.c'
executable = 'test1'
cc = 'gcc'
# there's no way to do this test for RISC-V at the moment; bionic's libc is 2.27
# and we allow all symbols from 2.27.
if 'riscv' in get_machine(cc):
self.skipTest("test not available for RISC-V")
# memfd_create was introduced in GLIBC 2.27, so is newer than the upper limit of
# all but RISC-V but still available on bionic
with open(source, 'w', encoding="utf8") as f:
f.write('''
#define _GNU_SOURCE
#include <sys/mman.h>
int memfd_create(const char *name, unsigned int flags);
int main()
{
memfd_create("test", 0);
return 0;
}
''')
self.assertEqual(call_symbol_check(cc, source, executable, []),
(1, executable + ': symbol memfd_create from unsupported version GLIBC_2.27\n' +
executable + ': failed IMPORTED_SYMBOLS'))
# -lutil is part of the libc6 package so a safe bet that it's installed
# it's also out of context enough that it's unlikely to ever become a real dependency
source = 'test2.c'
executable = 'test2'
with open(source, 'w', encoding="utf8") as f:
f.write('''
#include <utmp.h>
int main()
{
login(0);
return 0;
}
''')
self.assertEqual(call_symbol_check(cc, source, executable, ['-lutil']),
(1, executable + ': NEEDED library libutil.so.1 is not allowed\n' +
executable + ': failed LIBRARY_DEPENDENCIES'))
# finally, check a conforming file that simply uses a math function
source = 'test3.c'
executable = 'test3'
with open(source, 'w', encoding="utf8") as f:
f.write('''
#include <math.h>
int main()
{
return (int)pow(2.0, 4.0);
}
''')
self.assertEqual(call_symbol_check(cc, source, executable, ['-lm']),
(0, ''))
if __name__ == '__main__':
unittest.main()
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