def test_exceeding_unpacker_read_size():
dumpf = compat.BytesIO()
packer = msgpack.Packer()
NUMBER_OF_STRINGS = 6
read_size = 16
# 5 ok for read_size=16, while 6 glibc detected *** python: double free or corruption (fasttop):
# 20 ok for read_size=256, while 25 segfaults / glibc detected *** python: double free or corruption (!prev)
# 40 ok for read_size=1024, while 50 introduces errors
# 7000 ok for read_size=1024*1024, while 8000 leads to glibc detected *** python: double free or corruption (!prev):
for idx in range(NUMBER_OF_STRINGS):
data = gen_binary_data(idx)
dumpf.write(packer.pack(data))
f = compat.BytesIO(dumpf.getvalue())
dumpf.close()
unpacker = msgpack.Unpacker(f, read_size=read_size, use_list=1)
read_count = 0
for idx, o in enumerate(unpacker):
assert type(o) == bytes
assert o == gen_binary_data(idx)
read_count += 1
assert read_count == NUMBER_OF_STRINGS
def p(s):
packer = msgpack.Packer()
packer.pack_ext_type(0x42, s)
return packer.bytes()