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# This script is called by test_xpickle as a subprocess to load and dump
# pickles in a different Python version.
import os
import pickle
import struct
import sys
# This allows the xpickle worker to import picklecommon.py, which it needs
# since some of the pickle objects hold references to picklecommon.py.
test_mod_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
'picklecommon.py'))
if sys.version_info >= (3, 5):
import importlib.util
spec = importlib.util.spec_from_file_location('test.picklecommon', test_mod_path)
sys.modules['test'] = type(sys)('test')
test_module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(test_module)
sys.modules['test.picklecommon'] = test_module
else:
test_module = type(sys)('test.picklecommon')
sys.modules['test.picklecommon'] = test_module
sys.modules['test'] = type(sys)('test')
with open(test_mod_path, 'rb') as f:
sources = f.read()
exec(sources, vars(test_module))
def read_exact(f, n):
buf = b''
while len(buf) < n:
chunk = f.read(n - len(buf))
if not chunk:
raise EOFError
buf += chunk
return buf
in_stream = getattr(sys.stdin, 'buffer', sys.stdin)
out_stream = getattr(sys.stdout, 'buffer', sys.stdout)
try:
while True:
size, = struct.unpack('!i', read_exact(in_stream, 4))
if not size:
break
data = read_exact(in_stream, size)
protocol, = struct.unpack('!i', data[:4])
obj = pickle.loads(data[4:])
data = pickle.dumps(obj, protocol)
out_stream.write(struct.pack('!i', len(data)) + data)
out_stream.flush()
except Exception as exc:
# dump the exception to stdout and write to stderr, then exit
try:
data = pickle.dumps(exc)
out_stream.write(struct.pack('!i', -len(data)) + data)
out_stream.flush()
except Exception:
out_stream.write(struct.pack('!i', 0))
out_stream.flush()
sys.stderr.write(repr(exc))
sys.stderr.flush()
sys.exit(1)
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