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42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
#!/usr/bin/env python
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# coding: utf-8
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import io
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import msgpack
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binarydata = bytes(bytearray(range(256)))
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def gen_binary_data(idx):
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return binarydata[: idx % 300]
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def test_exceeding_unpacker_read_size():
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dumpf = io.BytesIO()
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packer = msgpack.Packer()
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NUMBER_OF_STRINGS = 6
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read_size = 16
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# 5 ok for read_size=16, while 6 glibc detected *** python: double free or corruption (fasttop):
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# 20 ok for read_size=256, while 25 segfaults / glibc detected *** python: double free or corruption (!prev)
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# 40 ok for read_size=1024, while 50 introduces errors
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# 7000 ok for read_size=1024*1024, while 8000 leads to glibc detected *** python: double free or corruption (!prev):
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for idx in range(NUMBER_OF_STRINGS):
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data = gen_binary_data(idx)
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dumpf.write(packer.pack(data))
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f = io.BytesIO(dumpf.getvalue())
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dumpf.close()
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unpacker = msgpack.Unpacker(f, read_size=read_size, use_list=1)
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read_count = 0
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for idx, o in enumerate(unpacker):
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assert type(o) == bytes
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assert o == gen_binary_data(idx)
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read_count += 1
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assert read_count == NUMBER_OF_STRINGS
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