#!/usr/bin/env python
import os
import stat
import ctypes
import lief
import pytest

from utils import get_sample, has_recent_glibc, is_linux, is_x86_64

SYMBOLS = {
    "myinstance": 0x1159,
    "myinit":     0x1175,
    "mycalc":     0x1199,
    "mydelete":   0x1214,
}

@pytest.mark.skipif(not is_linux() or not is_x86_64(), reason="requires Linux x86-64")
@pytest.mark.skipif(not has_recent_glibc(), reason="needs a recent GLIBC version")
def test_gnu_hash(tmpdir):
    target_path = get_sample('ELF/ELF64_x86-64_binary_empty-gnu-hash.bin')
    output      = os.path.join(tmpdir, "libnoempty.so")

    binary = lief.parse(target_path)
    binary[lief.ELF.DYNAMIC_TAGS.FLAGS_1].remove(lief.ELF.DYNAMIC_FLAGS_1.PIE)

    for name, addr in SYMBOLS.items():
        binary.add_exported_function(addr, name)
    binary.write(output)

    st = os.stat(output)
    os.chmod(output, st.st_mode | stat.S_IEXEC)
    print(output)

    lib = ctypes.cdll.LoadLibrary(output)

    # Raise 'AttributeError' if not exported
    print(lib.myinstance)
    assert lib.myinstance is not None