| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Usage:
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| 4 | # ./pickle.sh <function name>
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| 5 |
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| 6 | set -o nounset
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| 7 | set -o pipefail
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| 8 | set -o errexit
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| 9 |
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| 10 | #
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| 11 | # Protocol TWO
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| 12 | #
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| 13 |
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| 14 | # Opcodes for pure data. BIN is for"binary"
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| 15 |
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| 16 | # PROTO 2 # Say what protocol we're using
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| 17 |
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| 18 | # EMPTY_DICT
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| 19 | # EMPTY_LIST
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| 20 | # NEWTRUE
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| 21 | # BIN FLOAT
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| 22 | # BIN INT1
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| 23 | # BIN UNICODE -- don't like this, but OK
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| 24 |
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| 25 | # SET ITEMS # Dict
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| 26 | # APPENDS # List
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| 27 |
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| 28 | # MARK
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| 29 | # BIN PUT index
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| 30 | # BIN GET index
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| 31 |
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| 32 | # STOP
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| 33 |
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| 34 |
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| 35 | # Other:
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| 36 |
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| 37 | # GLOBAL -- push self.find_class(mod_name, class_name)
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| 38 | # NEWOBJ # build object by applying cls.__new__ to argtuple
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| 39 | # # OK this still relies on __new__ fundamentally, not sure I want
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| 40 | # it.
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| 41 | # BINPUT # store stack top in memo; index is string arg
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| 42 | # BINGET # push item from memo on stack; index is string arg
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| 43 | # BININT2 -- 10043
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| 44 | # SETITEM -- calls __dict__.update() or __setstate__()
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| 45 | # BUILD
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| 46 |
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| 47 |
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| 48 | # NOTE: There is no INST bytecode.
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| 49 | run() {
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| 50 | local kind=$1
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| 51 |
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| 52 | local p=_tmp/$kind.pickle
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| 53 |
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| 54 | for version in 0 1 2 3 4; do
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| 55 | demo/cpython/pickle_instance.py $kind $version $p
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| 56 |
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| 57 | python3 -m pickletools $p
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| 58 |
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| 59 | # Protocol 0 is viewable as plain text, but protocol 2 isn't
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| 60 | echo
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| 61 | echo "--- $p with PICKLE version $version ---"
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| 62 | echo
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| 63 |
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| 64 | od -c $p
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| 65 | ls -l $p
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| 66 |
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| 67 | echo
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| 68 | echo ---
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| 69 | echo
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| 70 |
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| 71 | done
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| 72 | }
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| 73 |
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| 74 | instance() {
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| 75 | run instance
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| 76 | }
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| 77 |
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| 78 | pure-data() {
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| 79 | run pure-data
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| 80 | }
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| 81 |
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| 82 | #
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| 83 | # Protocol ZERO
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| 84 | #
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| 85 |
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| 86 | # The pickle VM has a stack and a memo dictionary.
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| 87 | #
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| 88 | # Oh and it also uses copy_reg and _reconstructor
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| 89 | # OK so what I'm missing is __new__! I didn't know about that.
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| 90 | # It creates an object without initializing fields. OK.
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| 91 | # Not sure I want that in OVM2.
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| 92 |
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| 93 | # def _reconstructor(cls, base, state):
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| 94 | # if base is object:
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| 95 | # obj = object.__new__(cls)
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| 96 | # else:
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| 97 | # obj = base.__new__(cls, state)
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| 98 | # if base.__init__ != object.__init__:
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| 99 | # base.__init__(obj, state)
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| 100 | # return obj
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| 101 |
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| 102 |
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| 103 | # opcodes used:
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| 104 | # GLOBAL
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| 105 | # PUT # store stack top in memo
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| 106 | # MARK # set a mark
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| 107 | # REDUCE # apply a callable
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| 108 | # SETITEM # add key-value pair to dict
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| 109 | # BUILD # call __dict__.update() (or __setstate__)
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| 110 |
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| 111 | # TUPLE
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| 112 | # DICT
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| 113 | # INT
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| 114 | # NONE
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| 115 | # STRING
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| 116 |
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| 117 |
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| 118 | "$@"
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