コード例 #1
0
ファイル: test_compile.py プロジェクト: soIu/rpython
def test_compile_tmp_callback():
    from rpython.jit.backend.llgraph import runner
    from rpython.rtyper.lltypesystem import lltype, llmemory
    from rpython.rtyper.annlowlevel import llhelper
    from rpython.rtyper.llinterp import LLException
    #
    cpu = runner.LLGraphCPU(None)
    FUNC = lltype.FuncType([lltype.Signed] * 4, lltype.Signed)

    def ll_portal_runner(g1, g2, r3, r4):
        assert (g1, g2, r3, r4) == (12, 34, -156, -178)
        if raiseme:
            raise raiseme
        else:
            return 54321

    #
    class FakeJitDriverSD:
        portal_runner_ptr = llhelper(lltype.Ptr(FUNC), ll_portal_runner)
        portal_runner_adr = llmemory.cast_ptr_to_adr(portal_runner_ptr)
        portal_calldescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT, None)
        portal_finishtoken = compile.DoneWithThisFrameDescrInt()
        propagate_exc_descr = compile.PropagateExceptionDescr()
        num_red_args = 2
        result_type = INT

    #
    loop_token = compile_tmp_callback(
        cpu, FakeJitDriverSD(), [ConstInt(12), ConstInt(34)], "ii")
    #
    raiseme = None
    # only two arguments must be passed in
    deadframe = cpu.execute_token(loop_token, -156, -178)
    fail_descr = cpu.get_latest_descr(deadframe)
    assert fail_descr is FakeJitDriverSD().portal_finishtoken
    #
    EXC = lltype.GcStruct('EXC')
    llexc = lltype.malloc(EXC)
    raiseme = LLException("exception class", llexc)
    deadframe = cpu.execute_token(loop_token, -156, -178)
    fail_descr = cpu.get_latest_descr(deadframe)
    assert isinstance(fail_descr, compile.PropagateExceptionDescr)
    got = cpu.grab_exc_value(deadframe)
    assert lltype.cast_opaque_ptr(lltype.Ptr(EXC), got) == llexc

    #
    class FakeMetaInterpSD:
        pass

    FakeMetaInterpSD.cpu = cpu
    deadframe = cpu.execute_token(loop_token, -156, -178)
    fail_descr = cpu.get_latest_descr(deadframe)
    try:
        fail_descr.handle_fail(deadframe, FakeMetaInterpSD(), None)
    except jitexc.ExitFrameWithExceptionRef as e:
        assert lltype.cast_opaque_ptr(lltype.Ptr(EXC), e.value) == llexc
    else:
        assert 0, "should have raised"
コード例 #2
0
ファイル: test_util.py プロジェクト: zcxowwww/pypy
class LLtypeMixin(object):
    node_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    node_vtable.name = rclass.alloc_array_name('node')
    node_vtable2 = lltype.malloc(OBJECT_VTABLE, immortal=True)
    node_vtable2.name = rclass.alloc_array_name('node2')
    node_vtable3 = lltype.malloc(OBJECT_VTABLE, immortal=True)
    node_vtable3.name = rclass.alloc_array_name('node3')
    node_vtable3.subclassrange_min = 3
    node_vtable3.subclassrange_max = 3
    cpu = runner.LLGraphCPU(None)

    NODE = lltype.GcForwardReference()
    S = lltype.GcForwardReference()
    NODE.become(
        lltype.GcStruct('NODE', ('parent', OBJECT), ('value', lltype.Signed),
                        ('floatval', lltype.Float), ('charval', lltype.Char),
                        ('nexttuple', lltype.Ptr(S)),
                        ('next', lltype.Ptr(NODE))))
    S.become(
        lltype.GcStruct('TUPLE', ('a', lltype.Signed), ('abis', lltype.Signed),
                        ('b', lltype.Ptr(NODE))))
    NODE2 = lltype.GcStruct('NODE2', ('parent', NODE),
                            ('other', lltype.Ptr(NODE)))

    NODE3 = lltype.GcForwardReference()
    NODE3.become(
        lltype.GcStruct('NODE3', ('parent', OBJECT), ('value', lltype.Signed),
                        ('next', lltype.Ptr(NODE3)),
                        hints={'immutable': True}))

    big_fields = [('big' + i, lltype.Signed) for i in string.ascii_lowercase]
    BIG = lltype.GcForwardReference()
    BIG.become(lltype.GcStruct('BIG', *big_fields, hints={'immutable': True}))

    for field, _ in big_fields:
        locals()[field + 'descr'] = cpu.fielddescrof(BIG, field)

    node = lltype.malloc(NODE)
    node.value = 5
    node.next = node
    node.parent.typeptr = node_vtable
    nodeaddr = lltype.cast_opaque_ptr(llmemory.GCREF, node)
    #nodebox = InputArgRef(lltype.cast_opaque_ptr(llmemory.GCREF, node))
    node2 = lltype.malloc(NODE2)
    node2.parent.parent.typeptr = node_vtable2
    node2addr = lltype.cast_opaque_ptr(llmemory.GCREF, node2)
    myptr = lltype.cast_opaque_ptr(llmemory.GCREF, node)
    mynodeb = lltype.malloc(NODE)
    myarray = lltype.cast_opaque_ptr(
        llmemory.GCREF,
        lltype.malloc(lltype.GcArray(lltype.Signed), 13, zero=True))
    mynodeb.parent.typeptr = node_vtable
    myptrb = lltype.cast_opaque_ptr(llmemory.GCREF, mynodeb)
    myptr2 = lltype.malloc(NODE2)
    myptr2.parent.parent.typeptr = node_vtable2
    myptr2 = lltype.cast_opaque_ptr(llmemory.GCREF, myptr2)
    nullptr = lltype.nullptr(llmemory.GCREF.TO)

    mynode3 = lltype.malloc(NODE3)
    mynode3.parent.typeptr = node_vtable3
    mynode3.value = 7
    mynode3.next = mynode3
    myptr3 = lltype.cast_opaque_ptr(llmemory.GCREF, mynode3)  # a NODE2
    mynode4 = lltype.malloc(NODE3)
    mynode4.parent.typeptr = node_vtable3
    myptr4 = lltype.cast_opaque_ptr(llmemory.GCREF, mynode4)  # a NODE3

    nodesize = cpu.sizeof(NODE, node_vtable)
    node_tid = nodesize.get_type_id()
    nodesize2 = cpu.sizeof(NODE2, node_vtable2)
    nodesize3 = cpu.sizeof(NODE3, node_vtable3)
    valuedescr = cpu.fielddescrof(NODE, 'value')
    floatdescr = cpu.fielddescrof(NODE, 'floatval')
    chardescr = cpu.fielddescrof(NODE, 'charval')
    nextdescr = cpu.fielddescrof(NODE, 'next')
    nexttupledescr = cpu.fielddescrof(NODE, 'nexttuple')
    otherdescr = cpu.fielddescrof(NODE2, 'other')
    valuedescr3 = cpu.fielddescrof(NODE3, 'value')
    nextdescr3 = cpu.fielddescrof(NODE3, 'next')
    assert valuedescr3.is_always_pure()
    assert nextdescr3.is_always_pure()

    accessor = FieldListAccessor()
    accessor.initialize(None, {'inst_field': IR_QUASIIMMUTABLE})
    QUASI = lltype.GcStruct('QUASIIMMUT', ('inst_field', lltype.Signed),
                            ('mutate_field', rclass.OBJECTPTR),
                            hints={'immutable_fields': accessor})
    quasisize = cpu.sizeof(QUASI, None)
    quasi = lltype.malloc(QUASI, immortal=True)
    quasi.inst_field = -4247
    quasifielddescr = cpu.fielddescrof(QUASI, 'inst_field')
    quasiptr = lltype.cast_opaque_ptr(llmemory.GCREF, quasi)
    quasiimmutdescr = QuasiImmutDescr(cpu, quasiptr, quasifielddescr,
                                      cpu.fielddescrof(QUASI, 'mutate_field'))

    NODEOBJ = lltype.GcStruct('NODEOBJ', ('parent', OBJECT),
                              ('ref', lltype.Ptr(OBJECT)))
    nodeobj = lltype.malloc(NODEOBJ)
    nodeobjvalue = lltype.cast_opaque_ptr(llmemory.GCREF, nodeobj)
    refdescr = cpu.fielddescrof(NODEOBJ, 'ref')

    INTOBJ_NOIMMUT = lltype.GcStruct('INTOBJ_NOIMMUT', ('parent', OBJECT),
                                     ('intval', lltype.Signed))
    INTOBJ_IMMUT = lltype.GcStruct('INTOBJ_IMMUT', ('parent', OBJECT),
                                   ('intval', lltype.Signed),
                                   hints={'immutable': True})
    intobj_noimmut_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    intobj_immut_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    noimmut_intval = cpu.fielddescrof(INTOBJ_NOIMMUT, 'intval')
    immut_intval = cpu.fielddescrof(INTOBJ_IMMUT, 'intval')
    immut = lltype.malloc(INTOBJ_IMMUT, zero=True)
    immutaddr = lltype.cast_opaque_ptr(llmemory.GCREF, immut)
    noimmut_descr = cpu.sizeof(INTOBJ_NOIMMUT, intobj_noimmut_vtable)
    immut_descr = cpu.sizeof(INTOBJ_IMMUT, intobj_immut_vtable)

    PTROBJ_IMMUT = lltype.GcStruct('PTROBJ_IMMUT', ('parent', OBJECT),
                                   ('ptrval', lltype.Ptr(OBJECT)),
                                   hints={'immutable': True})
    ptrobj_immut_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    ptrobj_immut_descr = cpu.sizeof(PTROBJ_IMMUT, ptrobj_immut_vtable)
    immut_ptrval = cpu.fielddescrof(PTROBJ_IMMUT, 'ptrval')

    arraydescr = cpu.arraydescrof(lltype.GcArray(lltype.Signed))
    int32arraydescr = cpu.arraydescrof(lltype.GcArray(rffi.INT))
    int16arraydescr = cpu.arraydescrof(lltype.GcArray(rffi.SHORT))
    float32arraydescr = cpu.arraydescrof(lltype.GcArray(lltype.SingleFloat))
    arraydescr_tid = arraydescr.get_type_id()
    array = lltype.malloc(lltype.GcArray(lltype.Signed), 15, zero=True)
    arrayref = lltype.cast_opaque_ptr(llmemory.GCREF, array)
    array2 = lltype.malloc(lltype.GcArray(lltype.Ptr(S)), 15, zero=True)
    array2ref = lltype.cast_opaque_ptr(llmemory.GCREF, array2)
    gcarraydescr = cpu.arraydescrof(lltype.GcArray(llmemory.GCREF))
    gcarraydescr_tid = gcarraydescr.get_type_id()
    floatarraydescr = cpu.arraydescrof(lltype.GcArray(lltype.Float))

    arrayimmutdescr = cpu.arraydescrof(
        lltype.GcArray(lltype.Signed, hints={"immutable": True}))
    immutarray = lltype.cast_opaque_ptr(
        llmemory.GCREF, lltype.malloc(arrayimmutdescr.A, 13, zero=True))
    gcarrayimmutdescr = cpu.arraydescrof(
        lltype.GcArray(llmemory.GCREF, hints={"immutable": True}))
    floatarrayimmutdescr = cpu.arraydescrof(
        lltype.GcArray(lltype.Float, hints={"immutable": True}))

    # a GcStruct not inheriting from OBJECT
    tpl = lltype.malloc(S, zero=True)
    tupleaddr = lltype.cast_opaque_ptr(llmemory.GCREF, tpl)
    nodefull2 = lltype.malloc(NODE, zero=True)
    nodefull2addr = lltype.cast_opaque_ptr(llmemory.GCREF, nodefull2)
    ssize = cpu.sizeof(S, None)
    adescr = cpu.fielddescrof(S, 'a')
    abisdescr = cpu.fielddescrof(S, 'abis')
    bdescr = cpu.fielddescrof(S, 'b')
    #sbox = BoxPtr(lltype.cast_opaque_ptr(llmemory.GCREF, lltype.malloc(S)))
    arraydescr2 = cpu.arraydescrof(lltype.GcArray(lltype.Ptr(S)))

    T = lltype.GcStruct('TUPLE', ('c', lltype.Signed),
                        ('d', lltype.Ptr(lltype.GcArray(lltype.Ptr(NODE)))))

    W_ROOT = lltype.GcStruct(
        'W_ROOT', ('parent', OBJECT), ('inst_w_seq', llmemory.GCREF),
        ('inst_index', lltype.Signed), ('inst_w_list', llmemory.GCREF),
        ('inst_length', lltype.Signed), ('inst_start', lltype.Signed),
        ('inst_step', lltype.Signed))
    inst_w_seq = cpu.fielddescrof(W_ROOT, 'inst_w_seq')
    inst_index = cpu.fielddescrof(W_ROOT, 'inst_index')
    inst_length = cpu.fielddescrof(W_ROOT, 'inst_length')
    inst_start = cpu.fielddescrof(W_ROOT, 'inst_start')
    inst_step = cpu.fielddescrof(W_ROOT, 'inst_step')
    inst_w_list = cpu.fielddescrof(W_ROOT, 'inst_w_list')
    w_root_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)

    tsize = cpu.sizeof(T, None)
    cdescr = cpu.fielddescrof(T, 'c')
    ddescr = cpu.fielddescrof(T, 'd')
    arraydescr3 = cpu.arraydescrof(lltype.GcArray(lltype.Ptr(NODE3)))

    U = lltype.GcStruct('U', ('parent', OBJECT),
                        ('one', lltype.Ptr(lltype.GcArray(lltype.Ptr(NODE)))))
    u_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    SIMPLE = lltype.GcStruct('simple', ('parent', OBJECT),
                             ('value', lltype.Signed))
    simplevalue = cpu.fielddescrof(SIMPLE, 'value')
    simple_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    simpledescr = cpu.sizeof(SIMPLE, simple_vtable)
    simple = lltype.malloc(SIMPLE, zero=True)
    simpleaddr = lltype.cast_opaque_ptr(llmemory.GCREF, simple)
    #usize = cpu.sizeof(U, ...)
    onedescr = cpu.fielddescrof(U, 'one')

    FUNC = lltype.FuncType([lltype.Signed], lltype.Signed)
    plaincalldescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                     EffectInfo.MOST_GENERAL)
    elidablecalldescr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([valuedescr], [], [], [valuedescr], [], [],
                   EffectInfo.EF_ELIDABLE_CANNOT_RAISE))
    elidable2calldescr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([valuedescr], [], [], [valuedescr], [], [],
                   EffectInfo.EF_ELIDABLE_OR_MEMORYERROR))
    elidable3calldescr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([valuedescr], [], [], [valuedescr], [], [],
                   EffectInfo.EF_ELIDABLE_CAN_RAISE))
    nonwritedescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                    EffectInfo([], [], [], [], [], []))
    writeadescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                  EffectInfo([], [], [], [adescr], [], []))
    writearraydescr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([], [], [], [adescr], [arraydescr], []))
    writevalue3descr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([], [], [], [valuedescr3], [], []))
    readadescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                 EffectInfo([adescr], [], [], [], [], []))
    mayforcevirtdescr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([nextdescr], [], [], [], [], [],
                   EffectInfo.EF_FORCES_VIRTUAL_OR_VIRTUALIZABLE,
                   can_invalidate=True))
    arraycopydescr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([], [arraydescr], [], [], [arraydescr], [],
                   EffectInfo.EF_CANNOT_RAISE,
                   oopspecindex=EffectInfo.OS_ARRAYCOPY))

    raw_malloc_descr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([], [], [], [], [], [],
                   EffectInfo.EF_CAN_RAISE,
                   oopspecindex=EffectInfo.OS_RAW_MALLOC_VARSIZE_CHAR))
    raw_free_descr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([], [], [], [], [], [],
                   EffectInfo.EF_CANNOT_RAISE,
                   oopspecindex=EffectInfo.OS_RAW_FREE))

    chararray = lltype.GcArray(lltype.Char)
    chararraydescr = cpu.arraydescrof(chararray)
    u2array = lltype.GcArray(rffi.USHORT)
    u2arraydescr = cpu.arraydescrof(u2array)

    nodefull = lltype.malloc(NODE2, zero=True)
    nodefull.parent.next = lltype.cast_pointer(lltype.Ptr(NODE), nodefull)
    nodefull.parent.nexttuple = tpl
    nodefulladdr = lltype.cast_opaque_ptr(llmemory.GCREF, nodefull)

    # array of structs (complex data)
    complexarray = lltype.GcArray(
        lltype.Struct(
            "complex",
            ("real", lltype.Float),
            ("imag", lltype.Float),
        ))
    complexarraydescr = cpu.arraydescrof(complexarray)
    complexrealdescr = cpu.interiorfielddescrof(complexarray, "real")
    compleximagdescr = cpu.interiorfielddescrof(complexarray, "imag")
    complexarraycopydescr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([], [complexarraydescr], [], [], [complexarraydescr], [],
                   EffectInfo.EF_CANNOT_RAISE,
                   oopspecindex=EffectInfo.OS_ARRAYCOPY))

    rawarraydescr = cpu.arraydescrof(
        lltype.Array(lltype.Signed, hints={'nolength': True}))
    rawarraydescr_char = cpu.arraydescrof(
        lltype.Array(lltype.Char, hints={'nolength': True}))
    rawarraydescr_float = cpu.arraydescrof(
        lltype.Array(lltype.Float, hints={'nolength': True}))

    fc_array = lltype.GcArray(
        lltype.Struct("floatchar", ("float", lltype.Float),
                      ("char", lltype.Char)))
    fc_array_descr = cpu.arraydescrof(fc_array)
    fc_array_floatdescr = cpu.interiorfielddescrof(fc_array, "float")
    fc_array_chardescr = cpu.interiorfielddescrof(fc_array, "char")

    for _name, _os in [
        ('strconcatdescr', 'OS_STR_CONCAT'),
        ('strslicedescr', 'OS_STR_SLICE'),
        ('strequaldescr', 'OS_STR_EQUAL'),
        ('streq_slice_checknull_descr', 'OS_STREQ_SLICE_CHECKNULL'),
        ('streq_slice_nonnull_descr', 'OS_STREQ_SLICE_NONNULL'),
        ('streq_slice_char_descr', 'OS_STREQ_SLICE_CHAR'),
        ('streq_nonnull_descr', 'OS_STREQ_NONNULL'),
        ('streq_nonnull_char_descr', 'OS_STREQ_NONNULL_CHAR'),
        ('streq_checknull_char_descr', 'OS_STREQ_CHECKNULL_CHAR'),
        ('streq_lengthok_descr', 'OS_STREQ_LENGTHOK'),
    ]:
        if _name in ('strconcatdescr', 'strslicedescr'):
            _extra = EffectInfo.EF_ELIDABLE_OR_MEMORYERROR
        else:
            _extra = EffectInfo.EF_ELIDABLE_CANNOT_RAISE
        _oopspecindex = getattr(EffectInfo, _os)
        locals()[_name] = \
            cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                EffectInfo([], [], [], [], [], [], _extra,
                           oopspecindex=_oopspecindex))
        #
        _oopspecindex = getattr(EffectInfo, _os.replace('STR', 'UNI'))
        locals()[_name.replace('str', 'unicode')] = \
            cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                EffectInfo([], [], [], [], [], [], _extra,
                           oopspecindex=_oopspecindex))

    s2u_descr = cpu.calldescrof(
        FUNC, FUNC.ARGS, FUNC.RESULT,
        EffectInfo([], [], [], [], [], [],
                   EffectInfo.EF_ELIDABLE_CAN_RAISE,
                   oopspecindex=EffectInfo.OS_STR2UNICODE))

    #

    class LoopToken(AbstractDescr):
        pass

    asmdescr = LoopToken()  # it can be whatever, it's not a descr though

    class FakeWarmRunnerDesc:
        pass

    FakeWarmRunnerDesc.cpu = cpu
    vrefinfo = VirtualRefInfo(FakeWarmRunnerDesc)
    virtualtokendescr = vrefinfo.descr_virtual_token
    virtualforceddescr = vrefinfo.descr_forced
    FUNC = lltype.FuncType([], lltype.Void)
    ei = EffectInfo([], [], [], [], [], [],
                    EffectInfo.EF_CANNOT_RAISE,
                    can_invalidate=False,
                    oopspecindex=EffectInfo.OS_JIT_FORCE_VIRTUALIZABLE)
    clear_vable = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT, ei)

    jit_virtual_ref_vtable = vrefinfo.jit_virtual_ref_vtable
    vref_descr = cpu.sizeof(vrefinfo.JIT_VIRTUAL_REF, jit_virtual_ref_vtable)

    FUNC = lltype.FuncType([lltype.Signed, lltype.Signed], lltype.Signed)
    ei = EffectInfo([], [], [], [], [], [],
                    EffectInfo.EF_ELIDABLE_CANNOT_RAISE,
                    can_invalidate=False,
                    oopspecindex=EffectInfo.OS_INT_PY_DIV)
    int_py_div_descr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT, ei)
    ei = EffectInfo([], [], [], [], [], [],
                    EffectInfo.EF_ELIDABLE_CANNOT_RAISE,
                    can_invalidate=False,
                    oopspecindex=EffectInfo.OS_INT_UDIV)
    int_udiv_descr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT, ei)
    ei = EffectInfo([], [], [], [], [], [],
                    EffectInfo.EF_ELIDABLE_CANNOT_RAISE,
                    can_invalidate=False,
                    oopspecindex=EffectInfo.OS_INT_PY_MOD)
    int_py_mod_descr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT, ei)

    FUNC = lltype.FuncType([], llmemory.GCREF)
    ei = EffectInfo([], [], [], [], [], [], EffectInfo.EF_ELIDABLE_CAN_RAISE)
    plain_r_calldescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT, ei)

    namespace = locals()
コード例 #3
0
ファイル: test_util.py プロジェクト: weijiwei/pypy
class LLtypeMixin(object):
    type_system = 'lltype'

    def get_class_of_box(self, box):
        return box.getref(rclass.OBJECTPTR).typeptr

    node_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    node_vtable.name = rclass.alloc_array_name('node')
    node_vtable_adr = llmemory.cast_ptr_to_adr(node_vtable)
    node_vtable2 = lltype.malloc(OBJECT_VTABLE, immortal=True)
    node_vtable2.name = rclass.alloc_array_name('node2')
    node_vtable_adr2 = llmemory.cast_ptr_to_adr(node_vtable2)
    cpu = runner.LLGraphCPU(None)

    NODE = lltype.GcForwardReference()
    NODE.become(lltype.GcStruct('NODE', ('parent', OBJECT),
                                        ('value', lltype.Signed),
                                        ('floatval', lltype.Float),
                                        ('charval', lltype.Char),
                                        ('next', lltype.Ptr(NODE))))
    NODE2 = lltype.GcStruct('NODE2', ('parent', NODE),
                                     ('other', lltype.Ptr(NODE)))
    node = lltype.malloc(NODE)
    node.parent.typeptr = node_vtable
    node2 = lltype.malloc(NODE2)
    node2.parent.parent.typeptr = node_vtable2
    nodebox = BoxPtr(lltype.cast_opaque_ptr(llmemory.GCREF, node))
    myptr = nodebox.value
    myptr2 = lltype.cast_opaque_ptr(llmemory.GCREF, lltype.malloc(NODE))
    nullptr = lltype.nullptr(llmemory.GCREF.TO)
    nodebox2 = BoxPtr(lltype.cast_opaque_ptr(llmemory.GCREF, node2))
    nodesize = cpu.sizeof(NODE)
    nodesize2 = cpu.sizeof(NODE2)
    valuedescr = cpu.fielddescrof(NODE, 'value')
    floatdescr = cpu.fielddescrof(NODE, 'floatval')
    chardescr = cpu.fielddescrof(NODE, 'charval')
    nextdescr = cpu.fielddescrof(NODE, 'next')
    otherdescr = cpu.fielddescrof(NODE2, 'other')

    accessor = FieldListAccessor()
    accessor.initialize(None, {'inst_field': IR_QUASIIMMUTABLE})
    QUASI = lltype.GcStruct('QUASIIMMUT', ('inst_field', lltype.Signed),
                            ('mutate_field', rclass.OBJECTPTR),
                            hints={'immutable_fields': accessor})
    quasisize = cpu.sizeof(QUASI)
    quasi = lltype.malloc(QUASI, immortal=True)
    quasi.inst_field = -4247
    quasifielddescr = cpu.fielddescrof(QUASI, 'inst_field')
    quasibox = BoxPtr(lltype.cast_opaque_ptr(llmemory.GCREF, quasi))
    quasiptr = quasibox.value
    quasiimmutdescr = QuasiImmutDescr(cpu, quasibox,
                                      quasifielddescr,
                                      cpu.fielddescrof(QUASI, 'mutate_field'))

    NODEOBJ = lltype.GcStruct('NODEOBJ', ('parent', OBJECT),
                                         ('ref', lltype.Ptr(OBJECT)))
    nodeobj = lltype.malloc(NODEOBJ)
    nodeobjvalue = lltype.cast_opaque_ptr(llmemory.GCREF, nodeobj)
    refdescr = cpu.fielddescrof(NODEOBJ, 'ref')

    INTOBJ_NOIMMUT = lltype.GcStruct('INTOBJ_NOIMMUT', ('parent', OBJECT),
                                                ('intval', lltype.Signed))
    INTOBJ_IMMUT = lltype.GcStruct('INTOBJ_IMMUT', ('parent', OBJECT),
                                            ('intval', lltype.Signed),
                                            hints={'immutable': True})
    intobj_noimmut_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    intobj_immut_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    noimmut_intval = cpu.fielddescrof(INTOBJ_NOIMMUT, 'intval')
    immut_intval = cpu.fielddescrof(INTOBJ_IMMUT, 'intval')

    PTROBJ_IMMUT = lltype.GcStruct('PTROBJ_IMMUT', ('parent', OBJECT),
                                            ('ptrval', lltype.Ptr(OBJECT)),
                                            hints={'immutable': True})
    ptrobj_immut_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    immut_ptrval = cpu.fielddescrof(PTROBJ_IMMUT, 'ptrval')

    arraydescr = cpu.arraydescrof(lltype.GcArray(lltype.Signed))
    floatarraydescr = cpu.arraydescrof(lltype.GcArray(lltype.Float))

    # a GcStruct not inheriting from OBJECT
    S = lltype.GcStruct('TUPLE', ('a', lltype.Signed), ('b', lltype.Ptr(NODE)))
    ssize = cpu.sizeof(S)
    adescr = cpu.fielddescrof(S, 'a')
    bdescr = cpu.fielddescrof(S, 'b')
    sbox = BoxPtr(lltype.cast_opaque_ptr(llmemory.GCREF, lltype.malloc(S)))
    arraydescr2 = cpu.arraydescrof(lltype.GcArray(lltype.Ptr(S)))

    T = lltype.GcStruct('TUPLE',
                        ('c', lltype.Signed),
                        ('d', lltype.Ptr(lltype.GcArray(lltype.Ptr(NODE)))))
    tsize = cpu.sizeof(T)
    cdescr = cpu.fielddescrof(T, 'c')
    ddescr = cpu.fielddescrof(T, 'd')
    arraydescr3 = cpu.arraydescrof(lltype.GcArray(lltype.Ptr(NODE)))

    U = lltype.GcStruct('U',
                        ('parent', OBJECT),
                        ('one', lltype.Ptr(lltype.GcArray(lltype.Ptr(NODE)))))
    u_vtable = lltype.malloc(OBJECT_VTABLE, immortal=True)
    u_vtable_adr = llmemory.cast_ptr_to_adr(u_vtable)
    usize = cpu.sizeof(U)
    onedescr = cpu.fielddescrof(U, 'one')

    FUNC = lltype.FuncType([lltype.Signed], lltype.Signed)
    plaincalldescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                     EffectInfo.MOST_GENERAL)
    nonwritedescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                    EffectInfo([], [], [], [], [], []))
    writeadescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                  EffectInfo([], [], [], [adescr], [], []))
    writearraydescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                  EffectInfo([], [], [], [adescr], [arraydescr],
                                             []))
    readadescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                                 EffectInfo([adescr], [], [], [], [], []))
    mayforcevirtdescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                 EffectInfo([nextdescr], [], [], [], [], [],
                            EffectInfo.EF_FORCES_VIRTUAL_OR_VIRTUALIZABLE,
                            can_invalidate=True))
    arraycopydescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
             EffectInfo([], [arraydescr], [], [], [arraydescr], [],
                        EffectInfo.EF_CANNOT_RAISE,
                        oopspecindex=EffectInfo.OS_ARRAYCOPY))

    raw_malloc_descr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
             EffectInfo([], [], [], [], [], [],
                        EffectInfo.EF_CAN_RAISE,
                        oopspecindex=EffectInfo.OS_RAW_MALLOC_VARSIZE_CHAR))
    raw_free_descr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
             EffectInfo([], [], [], [], [], [],
                        EffectInfo.EF_CANNOT_RAISE,
                        oopspecindex=EffectInfo.OS_RAW_FREE))

    chararray = lltype.GcArray(lltype.Char)
    chararraydescr = cpu.arraydescrof(chararray)
    u2array = lltype.GcArray(rffi.USHORT)
    u2arraydescr = cpu.arraydescrof(u2array)

    # array of structs (complex data)
    complexarray = lltype.GcArray(
        lltype.Struct("complex",
            ("real", lltype.Float),
            ("imag", lltype.Float),
        )
    )
    complexarraydescr = cpu.arraydescrof(complexarray)
    complexrealdescr = cpu.interiorfielddescrof(complexarray, "real")
    compleximagdescr = cpu.interiorfielddescrof(complexarray, "imag")
    complexarraycopydescr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
            EffectInfo([], [complexarraydescr], [], [], [complexarraydescr], [],
                       EffectInfo.EF_CANNOT_RAISE,
                       oopspecindex=EffectInfo.OS_ARRAYCOPY))

    rawarraydescr = cpu.arraydescrof(lltype.Array(lltype.Signed,
                                                  hints={'nolength': True}))
    rawarraydescr_char = cpu.arraydescrof(lltype.Array(lltype.Char,
                                                       hints={'nolength': True}))
    rawarraydescr_float = cpu.arraydescrof(lltype.Array(lltype.Float,
                                                        hints={'nolength': True}))

    fc_array = lltype.GcArray(
        lltype.Struct(
            "floatchar", ("float", lltype.Float), ("char", lltype.Char)))
    fc_array_descr = cpu.arraydescrof(fc_array)
    fc_array_floatdescr = cpu.interiorfielddescrof(fc_array, "float")
    fc_array_chardescr = cpu.interiorfielddescrof(fc_array, "char")

    for _name, _os in [
        ('strconcatdescr',               'OS_STR_CONCAT'),
        ('strslicedescr',                'OS_STR_SLICE'),
        ('strequaldescr',                'OS_STR_EQUAL'),
        ('streq_slice_checknull_descr',  'OS_STREQ_SLICE_CHECKNULL'),
        ('streq_slice_nonnull_descr',    'OS_STREQ_SLICE_NONNULL'),
        ('streq_slice_char_descr',       'OS_STREQ_SLICE_CHAR'),
        ('streq_nonnull_descr',          'OS_STREQ_NONNULL'),
        ('streq_nonnull_char_descr',     'OS_STREQ_NONNULL_CHAR'),
        ('streq_checknull_char_descr',   'OS_STREQ_CHECKNULL_CHAR'),
        ('streq_lengthok_descr',         'OS_STREQ_LENGTHOK'),
        ]:
        _oopspecindex = getattr(EffectInfo, _os)
        locals()[_name] = \
            cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                EffectInfo([], [], [], [], [], [], EffectInfo.EF_CANNOT_RAISE,
                           oopspecindex=_oopspecindex))
        #
        _oopspecindex = getattr(EffectInfo, _os.replace('STR', 'UNI'))
        locals()[_name.replace('str', 'unicode')] = \
            cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
                EffectInfo([], [], [], [], [], [], EffectInfo.EF_CANNOT_RAISE,
                           oopspecindex=_oopspecindex))

    s2u_descr = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT,
            EffectInfo([], [], [], [], [], [],
                       oopspecindex=EffectInfo.OS_STR2UNICODE))
    #

    class LoopToken(AbstractDescr):
        pass
    asmdescr = LoopToken() # it can be whatever, it's not a descr though

    from rpython.jit.metainterp.virtualref import VirtualRefInfo

    class FakeWarmRunnerDesc:
        pass
    FakeWarmRunnerDesc.cpu = cpu
    vrefinfo = VirtualRefInfo(FakeWarmRunnerDesc)
    virtualtokendescr = vrefinfo.descr_virtual_token
    virtualforceddescr = vrefinfo.descr_forced
    FUNC = lltype.FuncType([], lltype.Void)
    ei = EffectInfo([], [], [], [], [], [], EffectInfo.EF_CANNOT_RAISE,
                    can_invalidate=False,
                    oopspecindex=EffectInfo.OS_JIT_FORCE_VIRTUALIZABLE)
    clear_vable = cpu.calldescrof(FUNC, FUNC.ARGS, FUNC.RESULT, ei)

    jit_virtual_ref_vtable = vrefinfo.jit_virtual_ref_vtable
    jvr_vtable_adr = llmemory.cast_ptr_to_adr(jit_virtual_ref_vtable)

    register_known_gctype(cpu, node_vtable,  NODE)
    register_known_gctype(cpu, node_vtable2, NODE2)
    register_known_gctype(cpu, u_vtable,     U)
    register_known_gctype(cpu, jit_virtual_ref_vtable,vrefinfo.JIT_VIRTUAL_REF)
    register_known_gctype(cpu, intobj_noimmut_vtable, INTOBJ_NOIMMUT)
    register_known_gctype(cpu, intobj_immut_vtable,   INTOBJ_IMMUT)
    register_known_gctype(cpu, ptrobj_immut_vtable,   PTROBJ_IMMUT)

    namespace = locals()