Ubuntu
python-cffi package

test failures on aarch64-linux-gnu

Bug #1271256 reported by Matthias Klose on 2014-01-21

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	python-cffi (Ubuntu)	Fix Released	Undecided	Unassigned

Bug Description

see https://launchpad.net/ubuntu/+source/python-cffi/0.8.1-1/+build/5477901

=================================== FAILURES ===================================
___________________________ TestFFI.test_wchar_cast ____________________________

self = <testing.test_ffi_backend.TestFFI object at 0x580e910>

    def test_wchar_cast(self):
        ffi = FFI(backend=self.Backend())
        self.check_wchar_t(ffi)
        p = ffi.cast("int", ffi.cast("wchar_t", u+'\u1234'))
        assert int(p) == 0x1234
        p = ffi.cast("long long", ffi.cast("wchar_t", -1))
        if SIZE_OF_WCHAR == 2: # 2 bytes, unsigned
            assert int(p) == 0xffff
        else: # 4 bytes, signed
> assert int(p) == -1
E assert 4294967295 == -1
E + where 4294967295 = int(<cdata 'long long' 4294967295>)

testing/backend_tests.py:759: AssertionError
________________ TestBitfield.test_bitfield_anonymous_no_align _________________

self = <testing.test_ffi_backend.TestBitfield instance at 0x76a7368>

    @pytest.mark.skipif("platform.machine().startswith('arm')")
    def test_bitfield_anonymous_no_align(self):
        L = FFI().alignof("long long")
> self.check("char y; int :1;", 0, 1, 2)

testing/test_ffi_backend.py:128:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <testing.test_ffi_backend.TestBitfield instance at 0x76a7368>
source = 'char y; int :1;', expected_ofs_y = 0, expected_align = 1
expected_size = 2

    def check(self, source, expected_ofs_y, expected_align, expected_size):
        # NOTE: 'expected_*' is the numbers expected from GCC.
        # The numbers expected from MSVC are not explicitly written
        # in this file, and will just be taken from the compiler.
        ffi = FFI()
        ffi.cdef("struct s1 { %s };" % source)
        ctype = ffi.typeof("struct s1")
        # verify the information with gcc
        ffi1 = FFI()
        ffi1.cdef("""
                static const int Gofs_y, Galign, Gsize;
                struct s1 *try_with_value(int fieldnum, long long value);
            """)
        fnames = [name for name, cfield in ctype.fields
                       if name and cfield.bitsize > 0]
        setters = ['case %d: s.%s = value; break;' % iname
                   for iname in enumerate(fnames)]
        lib = ffi1.verify("""
                struct s1 { %s };
                struct sa { char a; struct s1 b; };
                #define Gofs_y offsetof(struct s1, y)
                #define Galign offsetof(struct sa, b)
                #define Gsize sizeof(struct s1)
                struct s1 *try_with_value(int fieldnum, long long value)
                {
                    static struct s1 s;
                    memset(&s, 0, sizeof(s));
                    switch (fieldnum) { %s }
                    return &s;
                }
            """ % (source, ' '.join(setters)))
        if sys.platform == 'win32':
            expected_ofs_y = lib.Gofs_y
            expected_align = lib.Galign
            expected_size = lib.Gsize
        else:
> assert (lib.Gofs_y, lib.Galign, lib.Gsize) == (
                expected_ofs_y, expected_align, expected_size)
E assert (0L, 4L, 4L) == (0, 1, 2)
E At index 1 diff: 4L != 1

testing/test_ffi_backend.py:79: AssertionError
_______________________ TestBitfield.test_bitfield_zero ________________________

self = <testing.test_ffi_backend.TestBitfield instance at 0x73095a8>

    @pytest.mark.skipif("platform.machine().startswith('arm')")
    def test_bitfield_zero(self):
        L = FFI().alignof("long long")
> self.check("char y; int :0;", 0, 1, 4)

testing/test_ffi_backend.py:154:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <testing.test_ffi_backend.TestBitfield instance at 0x73095a8>
source = 'char y; int :0;', expected_ofs_y = 0, expected_align = 1
expected_size = 4