/pypy/jit/backend/x86/test/test_symbolic_x86.py
Python | 81 lines | 67 code | 10 blank | 4 comment | 0 complexity | bfc22ba7812e6ca15faff8999797f244 MD5 | raw file
- import py
- from pypy.jit.backend.llsupport.symbolic import *
- from pypy.rpython.lltypesystem import lltype, rffi
- # This test file is here and not in llsupport/test/ because it checks
- # that we get correct numbers for a 32-bit machine.
- class FakeStats(object):
- pass
- S = lltype.GcStruct('S', ('x', lltype.Signed),
- ('y', lltype.Signed),
- ('z', lltype.Signed))
- def test_field_token():
- ofs_x, size_x = get_field_token(S, 'x', False)
- ofs_y, size_y = get_field_token(S, 'y', False)
- ofs_z, size_z = get_field_token(S, 'z', False)
- # ofs_x might be 0 or not, depending on how we count the headers
- # but the rest should be as expected for a 386 machine
- assert size_x == size_y == size_z == 4
- assert ofs_x >= 0
- assert ofs_y == ofs_x + 4
- assert ofs_z == ofs_x + 8
- def test_struct_size():
- ofs_z, size_z = get_field_token(S, 'z', False)
- totalsize = get_size(S, False)
- assert totalsize == ofs_z + 4
- def test_primitive_size():
- assert get_size(lltype.Signed, False) == 4
- assert get_size(lltype.Char, False) == 1
- assert get_size(lltype.Ptr(S), False) == 4
- def test_array_token():
- A = lltype.GcArray(lltype.Char)
- basesize, itemsize, ofs_length = get_array_token(A, False)
- assert basesize >= 4 # at least the 'length', maybe some gc headers
- assert itemsize == 1
- assert ofs_length == basesize - 4
- A = lltype.GcArray(lltype.Signed)
- basesize, itemsize, ofs_length = get_array_token(A, False)
- assert basesize >= 4 # at least the 'length', maybe some gc headers
- assert itemsize == 4
- assert ofs_length == basesize - 4
- def test_varsized_struct_size():
- S1 = lltype.GcStruct('S1', ('parent', S),
- ('extra', lltype.Signed),
- ('chars', lltype.Array(lltype.Char)))
- size_parent = get_size(S, False)
- ofs_extra, size_extra = get_field_token(S1, 'extra', False)
- basesize, itemsize, ofs_length = get_array_token(S1, False)
- assert size_parent == ofs_extra
- assert size_extra == 4
- assert ofs_length == ofs_extra + 4
- assert basesize == ofs_length + 4
- assert itemsize == 1
- def test_string():
- STR = lltype.GcStruct('String', ('hash', lltype.Signed),
- ('chars', lltype.Array(lltype.Char)))
- basesize, itemsize, ofs_length = get_array_token(STR, False)
- assert itemsize == 1
- s1 = lltype.malloc(STR, 4)
- s1.chars[0] = 's'
- s1.chars[1] = 'p'
- s1.chars[2] = 'a'
- s1.chars[3] = 'm'
- x = ll2ctypes.lltype2ctypes(s1)
- rawbytes = ctypes.cast(x, ctypes.POINTER(ctypes.c_char))
- assert rawbytes[basesize+0] == 's'
- assert rawbytes[basesize+1] == 'p'
- assert rawbytes[basesize+2] == 'a'
- assert rawbytes[basesize+3] == 'm'
- assert rawbytes[ofs_length+0] == chr(4)
- assert rawbytes[ofs_length+1] == chr(0)
- assert rawbytes[ofs_length+2] == chr(0)
- assert rawbytes[ofs_length+3] == chr(0)