def get_external_function_sandbox_graph(fnobj, db, force_stub=False):
"""Build the graph of a helper trampoline function to be used
in place of real calls to the external function 'fnobj'. The
trampoline marshals its input arguments, dumps them to STDOUT,
and waits for an answer on STDIN.
"""
fnname = fnobj._name
if hasattr(fnobj, 'graph'):
# get the annotation of the input arguments and the result
graph = fnobj.graph
annotator = db.translator.annotator
args_s = [annotator.binding(v) for v in graph.getargs()]
s_result = annotator.binding(graph.getreturnvar())
else:
# pure external function - fall back to the annotations
# corresponding to the ll types
FUNCTYPE = lltype.typeOf(fnobj)
args_s = [annmodel.lltype_to_annotation(ARG) for ARG in FUNCTYPE.ARGS]
s_result = annmodel.lltype_to_annotation(FUNCTYPE.RESULT)
try:
if force_stub: # old case - don't try to support suggested_primitive
raise NotImplementedError("sandboxing for external function '%s'"
% (fnname,))
dump_arguments = rmarshal.get_marshaller(tuple(args_s))
load_result = rmarshal.get_loader(s_result)
except (NotImplementedError,
rmarshal.CannotMarshal,
rmarshal.CannotUnmarshall), e:
msg = 'Not Implemented: %s' % (e,)
log.WARNING(msg)
def execute(*args):
not_implemented_stub(msg)
elif error == 5: raise ZeroDivisionError
elif error == 6: raise MemoryError
elif error == 7: raise KeyError
elif error == 8: raise IndexError
else: raise RuntimeError
def not_implemented_stub(msg):
STDERR = 2
buf = rffi.str2charp(msg + '\n')
writeall_not_sandboxed(STDERR, buf, len(msg) + 1)
rffi.free_charp(buf)
raise RuntimeError(msg) # XXX in RPython, the msg is ignored at the moment
not_implemented_stub._annenforceargs_ = [str]
dump_string = rmarshal.get_marshaller(str)
load_int = rmarshal.get_loader(int)
def get_external_function_sandbox_graph(fnobj, db, force_stub=False):
"""Build the graph of a helper trampoline function to be used
in place of real calls to the external function 'fnobj'. The
trampoline marshals its input arguments, dumps them to STDOUT,
and waits for an answer on STDIN.
"""
fnname = fnobj._name
if hasattr(fnobj, 'graph'):
# get the annotation of the input arguments and the result
graph = fnobj.graph
annotator = db.translator.annotator
args_s = [annotator.binding(v) for v in graph.getargs()]
s_result = annotator.binding(graph.getreturnvar())
else:
