def ll_prepare_free_slot(_unused):
"""Free up a slot in the array of MAX entries, ready for storing
a new shadowstackref. Return the memory of the now-unused full
shadowstack.
"""
index = fullstack_cache[0]
if index > 0:
return llmemory.NULL # there is already at least one free slot
#
# make a compact copy in one old entry and return the
# original full-sized memory
index = -index
ll_assert(index > 0, "prepare_free_slot: cache[0] == 0")
compacting = lltype.cast_int_to_ptr(SHADOWSTACKREFPTR,
fullstack_cache[index])
index += 1
if index >= ShadowStackPool.MAX:
index = 1
fullstack_cache[0] = -index # update to the next value in order
#
compacting.detach()
original = compacting.base
size = compacting.top - original
new = llmemory.raw_malloc(size)
if new == llmemory.NULL:
return llmemory.NULL
llmemory.raw_memcopy(original, new, size)
compacting.base = new
compacting.top = new + size
return original
def fn(n):
s = lltype.cast_int_to_ptr(PS, n)
assert lltype.typeOf(s) == PS
assert lltype.cast_ptr_to_int(s) == n
t = lltype.cast_pointer(PT, s)
assert lltype.typeOf(t) == PT
assert lltype.cast_ptr_to_int(t) == n
assert s == lltype.cast_pointer(PS, t)
def test_name_gcref():
from rpython.rtyper.lltypesystem import lltype, llmemory, rclass
from rpython.translator.c import primitive
from rpython.translator.c.database import LowLevelDatabase
x = lltype.cast_int_to_ptr(rclass.OBJECTPTR, 19)
y = lltype.cast_opaque_ptr(llmemory.GCREF, x)
db = LowLevelDatabase()
assert primitive.name_gcref(y, db) == "((void*) 19)"
def fn(n):
s = lltype.cast_int_to_ptr(PS, n)
assert lltype.typeOf(s) == PS
assert lltype.cast_ptr_to_int(s) == n
t = lltype.cast_pointer(PT, s)
assert lltype.typeOf(t) == PT
assert lltype.cast_ptr_to_int(t) == n
assert s == lltype.cast_pointer(PS, t)
def cast_int_to_adr(int):
if isinstance(int, AddressAsInt):
return int.adr
try:
ptr = lltype.cast_int_to_ptr(_NONGCREF, int)
except ValueError:
from rpython.rtyper.lltypesystem import ll2ctypes
ptr = ll2ctypes._int2obj[int]._as_ptr()
return cast_ptr_to_adr(ptr)
def cast_int_to_adr(int):
if isinstance(int, AddressAsInt):
return int.adr
try:
ptr = lltype.cast_int_to_ptr(_NONGCREF, int)
except ValueError:
from rpython.rtyper.lltypesystem import ll2ctypes
ptr = ll2ctypes._int2obj[int]._as_ptr()
return cast_ptr_to_adr(ptr)
def test_name_gcref():
from rpython.rtyper.lltypesystem import lltype, llmemory
from rpython.rtyper import rclass
from rpython.translator.c import primitive
from rpython.translator.c.database import LowLevelDatabase
x = lltype.cast_int_to_ptr(rclass.OBJECTPTR, 19)
y = lltype.cast_opaque_ptr(llmemory.GCREF, x)
db = LowLevelDatabase()
assert primitive.name_gcref(y, db) == "((void*) 19)"
def convert_const(self, value):
if value._identity is _identity_for_ints:
config = self.rtyper.annotator.translator.config
assert config.translation.taggedpointers, "need to enable tagged pointers to use erase_int"
return lltype.cast_int_to_ptr(self.lowleveltype, value._x * 2 + 1)
bk = self.rtyper.annotator.bookkeeper
s_obj = value._identity.get_input_annotation(bk)
r_obj = self.rtyper.getrepr(s_obj)
if r_obj.lowleveltype is lltype.Void:
return lltype.nullptr(self.lowleveltype.TO)
v = r_obj.convert_const(value._x)
return lltype.cast_opaque_ptr(self.lowleveltype, v)
def convert_const(self, value):
if value._identity is _identity_for_ints:
config = self.rtyper.annotator.translator.config
assert config.translation.taggedpointers, "need to enable tagged pointers to use erase_int"
return lltype.cast_int_to_ptr(self.lowleveltype, value._x * 2 + 1)
bk = self.rtyper.annotator.bookkeeper
s_obj = value._identity.get_input_annotation(bk)
r_obj = self.rtyper.getrepr(s_obj)
if r_obj.lowleveltype is lltype.Void:
return lltype.nullptr(self.lowleveltype.TO)
v = r_obj.convert_const(value._x)
return lltype.cast_opaque_ptr(self.lowleveltype, v)
def ll_int_to_unboxed(PTRTYPE, value):
return lltype.cast_int_to_ptr(PTRTYPE, value * 2 + 1)
def op_cast_int_to_ptr(self, RESTYPE, int1):
return lltype.cast_int_to_ptr(RESTYPE, int1)
def op_cast_int_to_ptr(self, RESTYPE, int1):
return lltype.cast_int_to_ptr(RESTYPE, int1)
def fn(n):
t = lltype.cast_int_to_ptr(PT, n)
assert lltype.typeOf(t) == PT
assert lltype.cast_ptr_to_int(t) == n
o = lltype.cast_opaque_ptr(PQ, t)
assert lltype.cast_ptr_to_int(o) == n
def ll_int_to_unboxed(PTRTYPE, value):
return lltype.cast_int_to_ptr(PTRTYPE, value*2+1)
def fn(n):
t = lltype.cast_int_to_ptr(PT, n)
assert lltype.typeOf(t) == PT
assert lltype.cast_ptr_to_int(t) == n
o = lltype.cast_opaque_ptr(PQ, t)
assert lltype.cast_ptr_to_int(o) == n
