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from rpython.conftest import option
from rpython.translator.translator import TranslationContext, graphof
from rpython.translator.backendopt.all import backend_optimizations
from rpython.translator.transform import insert_ll_stackcheck
from rpython.memory.gctransform import shadowstack
def _follow_path_naive(block, cur_path, accum):
cur_path = (cur_path, block)
if not block.exits:
ops = []
while cur_path:
block = cur_path[1]
ops.extend(reversed(block.operations))
cur_path = cur_path[0]
accum.append(list(reversed(ops)))
return
for link in block.exits:
_follow_path_naive(link.target, cur_path, accum)
# explodes on loops!
def paths_naive(g):
accum = []
_follow_path_naive(g.startblock, None, accum)
return accum
def direct_target(spaceop):
return spaceop.args[0].value._obj.graph.name
def direct_calls(p):
names = []
for spaceop in p:
if spaceop.opname == 'direct_call':
names.append(direct_target(spaceop))
return names
def check(g, funcname, ignore=None):
paths = paths_naive(g)
relevant = []
for p in paths:
funcs_called = direct_calls(p)
if funcname in funcs_called and ignore not in funcs_called:
assert 'stack_check___' in funcs_called
assert (funcs_called.index(funcname) >
funcs_called.index('stack_check___'))
relevant.append(p)
return relevant
class A(object):
def __init__(self, n):
self.n = n
def f(a):
x = A(a.n+1)
if x.n == 10:
return
f(x)
def g(n):
f(A(n))
return 0
def test_simple():
t = TranslationContext()
a = t.buildannotator()
a.build_types(g, [int])
a.simplify()
t.buildrtyper().specialize()
backend_optimizations(t)
t.checkgraphs()
n = insert_ll_stackcheck(t)
t.checkgraphs()
assert n == 1
if option.view:
t.view()
check(graphof(t, f), 'f')
def test_gctransformed():
t = TranslationContext()
a = t.buildannotator()
a.build_types(g, [int])
a.simplify()
t.buildrtyper().specialize()
backend_optimizations(t)
t.checkgraphs()
n = insert_ll_stackcheck(t)
t.checkgraphs()
assert n == 1
exctransf = t.getexceptiontransformer()
f_graph = graphof(t, f)
exctransf.create_exception_handling(f_graph)
if option.view:
f_graph.show()
check(f_graph, 'f')
class GCTransform(shadowstack.ShadowStackFrameworkGCTransformer):
from rpython.memory.gc.generation import GenerationGC as \
GCClass
GC_PARAMS = {}
gctransf = GCTransform(t)
gctransf.transform_graph(f_graph)
if option.view:
f_graph.show()
relevant = check(f_graph, 'f')
for p in relevant:
in_between = False
reload = 0
for spaceop in p:
if spaceop.opname == 'direct_call':
target = direct_target(spaceop)
if target == 'f':
in_between = False
elif target == 'stack_check___':
in_between = True
if in_between and spaceop.opname == 'gc_reload_possibly_moved':
reload += 1
assert reload == 0
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