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import py, sys
from rpython.rtyper.lltypesystem.llmemory import *
from rpython.translator.c.test.test_genc import compile
from rpython.rlib.objectmodel import free_non_gc_object
def test_null():
def f():
return NULL - NULL
fc = compile(f, [])
def test_convert_to_bool():
def f(x):
if x:
return bool(NULL)
else:
return bool(NULL + 1)
fc = compile(f, [int])
res = fc(1)
assert isinstance(res, bool) and not res
res = fc(0)
assert isinstance(res, bool) and res
def test_memory_access():
def f(value):
addr = raw_malloc(16)
addr.signed[0] = value
result = addr.signed[0]
raw_free(addr)
return result
fc = compile(f, [int])
res = fc(42)
assert res == 42
res = fc(1)
assert res == 1
def test_memory_access_zero():
def f():
blocks = []
for i in range(1000):
addr = raw_malloc(16, zero=False)
addr.signed[1] = 10000 + i
blocks.append(addr)
for addr in blocks:
raw_free(addr)
result = 0
blocks = []
for i in range(1000):
addr = raw_malloc(16, zero=True)
result |= addr.signed[1]
blocks.append(addr)
for addr in blocks:
raw_free(addr)
return result
fc = compile(f, [])
res = fc()
assert res == 0
def test_memory_float():
S = lltype.GcStruct("S", ("x", lltype.Float), ("y", lltype.Float))
offset = FieldOffset(S, 'x')
offsety = FieldOffset(S, 'y')
def f(value):
s = lltype.malloc(S)
s.x = 123.2
a = cast_ptr_to_adr(s)
b = a + offset
assert b.float[0] == 123.2
b.float[0] = 234.1
(a + offsety).float[0] = value
assert s.x == 234.1
return s.x + value
fc = compile(f, [float])
res = fc(42.42)
assert res == f(42.42)
def test_offset_inside_fixed_array():
S = lltype.FixedSizeArray(lltype.Signed, 10)
offset = FieldOffset(S, 'item4')
def f(value):
s = lltype.malloc(S, flavor='raw')
s[4] = value
res = (cast_ptr_to_adr(s) + offset).signed[0]
lltype.free(s, flavor='raw')
return res
fc = compile(f, [int])
res = fc(42)
assert res == 42
def test_pointer_arithmetic():
def f(offset, char):
char = chr(char)
addr = raw_malloc(10000)
same_offset = (addr + 2 * offset - offset) - addr
addr.char[offset] = char
result = (addr + same_offset).char[0]
raw_free(addr)
return result
fc = compile(f, [int, int])
res = fc(10, ord("c"))
assert res == "c"
res = fc(12, ord("x"))
assert res == "x"
def test_pointer_arithmetic_inplace():
def f(offset, char):
char = chr(char)
addr = raw_malloc(10000)
addr += offset
addr.char[-offset] = char
addr -= offset
result = addr.char[0]
raw_free(addr)
return result
fc = compile(f, [int, int])
res = fc(10, ord("c"))
assert res == "c"
def test_raw_memcopy():
def f():
addr = raw_malloc(100)
addr.signed[0] = 12
(addr + 10).signed[0] = 42
(addr + 20).char[0] = "a"
addr1 = raw_malloc(100)
raw_memcopy(addr, addr1, 100)
result = addr1.signed[0] == 12
result = result and (addr1 + 10).signed[0] == 42
result = result and (addr1 + 20).char[0] == "a"
raw_free(addr)
raw_free(addr1)
return result
fc = compile(f, [])
res = fc()
assert res
def test_raw_memmove():
def f():
addr = raw_malloc(100)
addr.signed[0] = 12
(addr + 10).signed[0] = 42
raw_memmove(addr, addr + 4, 96)
result = (addr + 4).signed[0] + (addr + 14).signed[0]
raw_free(addr)
return result
fc = compile(f, [])
res = fc()
assert res
def test_pointer_comparison():
def f():
result = 0
addresses = [raw_malloc(1), NULL]
for addr1 in addresses:
addr2 = addr1 + 1
result = result * 2 + int(addr1 == addr2)
result = result * 2 + int(addr1 != addr2)
result = result * 2 + int(addr1 < addr2)
result = result * 2 + int(addr1 <= addr2)
result = result * 2 + int(addr1 > addr2)
result = result * 2 + int(addr1 >= addr2)
raw_free(addresses[0])
return result
fc = compile(f, [])
res = fc()
assert res == int('011100' * 2, 2)
def test_flavored_malloc_raw():
class A(object):
_alloc_flavor_ = "raw"
def __init__(self, val):
self.val = val
def f(x):
a = A(x + 1)
result = a.val
free_non_gc_object(a)
return result
fn = compile(f, [int])
assert fn(1) == 2
def test_gcref():
if sys.platform == 'darwin':
py.test.skip("'boehm' may crash")
S = lltype.GcStruct("S", ("x", lltype.Signed))
s = lltype.malloc(S)
s.x = 123
g1 = lltype.cast_opaque_ptr(GCREF, s)
g2 = lltype.cast_opaque_ptr(GCREF, lltype.nullptr(S))
def f2(x):
if x > 0:
return g1
else:
return g2
def f(x):
gref = f2(x)
g = lltype.cast_opaque_ptr(lltype.Ptr(S), gref)
if g:
return g.x
else:
return -42
fn = compile(f, [int], gcpolicy='boehm')
assert fn(3) == 123
assert fn(-3) == -42
def test_cast_adr_to_int():
S = lltype.Struct("S", ("x", lltype.Signed))
s = lltype.malloc(S, immortal=True)
adr = cast_ptr_to_adr(s)
def f(n):
i = cast_adr_to_int(adr)
if n > 10:
adr2 = adr
else:
adr2 = NULL
print "hello world" # prevent constant-folding
j = cast_adr_to_int(adr2)
return i - j
fc = compile(f, [int])
res = fc(42)
assert res == 0
def test_cast_int_to_adr():
S = lltype.Struct("S", ("x", lltype.Signed))
s = lltype.malloc(S, immortal=True)
s.x = 42
integer = cast_adr_to_int(cast_ptr_to_adr(s), mode="symbolic")
def f(n):
if n > 1:
i = integer
else:
i = 123 # nonsense, but never used
print "hello world" # prevent constant-folding
adr = cast_int_to_adr(i)
s = cast_adr_to_ptr(adr, lltype.Ptr(S))
return s.x
fc = compile(f, [int])
res = fc(5)
assert res == 42
def test_dict_of_addresses():
TP = lltype.Struct('x')
a = lltype.malloc(TP, flavor='raw', immortal=True)
b = lltype.malloc(TP, flavor='raw', immortal=True)
def f(i):
d = {}
d[cast_ptr_to_adr(a)] = 123
d[cast_ptr_to_adr(b)] = 456
if i > 5:
key = cast_ptr_to_adr(a)
else:
key = cast_ptr_to_adr(b)
return d[key]
fc = compile(f, [int])
res = fc(-77)
assert res == 456
res = fc(77)
assert res == 123
def test_gcarray_length():
A = lltype.GcArray(lltype.Char)
def f():
a = lltype.malloc(A, 117)
p = lltype.cast_opaque_ptr(GCREF, a)
return lltype.length_of_simple_gcarray_from_opaque(p)
fc = compile(f, [])
res = fc()
assert res == 117
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