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69 lines
3.0 KiB
Python
Executable File
69 lines
3.0 KiB
Python
Executable File
# Copyright (c) 2016 by Rocky Bernstein
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"""
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Python 2.4 bytecode scanner/deparser
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This overlaps Python's 2.4's dis module, but it can be run from
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Python 3 and other versions of Python. Also, we save token
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information for later use in deparsing.
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"""
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import uncompyle6.scanners.scanner25 as scan
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import uncompyle6.scanners.scanner2 as scan2
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# bytecode verification, verify(), uses JUMP_OPs from here
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from xdis.opcodes import opcode_24
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JUMP_OPs = opcode_24.JUMP_OPs
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# We base this off of 2.6 instead of the other way around
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# because we cleaned things up this way.
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# The history is that 2.7 support is the cleanest,
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# then from that we got 2.6 and so on.
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class Scanner24(scan.Scanner25):
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def __init__(self, show_asm):
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scan2.Scanner2.__init__(self, 2.4, show_asm)
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self.stmt_opcodes = frozenset([
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self.opc.SETUP_LOOP, self.opc.BREAK_LOOP,
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self.opc.SETUP_FINALLY, self.opc.END_FINALLY,
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self.opc.SETUP_EXCEPT, self.opc.POP_BLOCK,
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self.opc.STORE_FAST, self.opc.DELETE_FAST,
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self.opc.STORE_DEREF, self.opc.STORE_GLOBAL,
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self.opc.DELETE_GLOBAL, self.opc.STORE_NAME,
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self.opc.DELETE_NAME, self.opc.STORE_ATTR,
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self.opc.DELETE_ATTR, self.opc.STORE_SUBSCR,
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self.opc.DELETE_SUBSCR, self.opc.RETURN_VALUE,
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self.opc.RAISE_VARARGS, self.opc.POP_TOP,
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self.opc.PRINT_EXPR, self.opc.PRINT_ITEM,
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self.opc.PRINT_NEWLINE, self.opc.PRINT_ITEM_TO,
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self.opc.PRINT_NEWLINE_TO, self.opc.CONTINUE_LOOP,
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self.opc.JUMP_ABSOLUTE, self.opc.EXEC_STMT,
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])
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# "setup" opcodes
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self.setup_ops = frozenset([
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self.opc.SETUP_EXCEPT, self.opc.SETUP_FINALLY,
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])
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# opcodes with expect a variable number pushed values whose
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# count is in the opcode. For parsing we generally change the
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# opcode name to include that number.
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self.varargs_ops = frozenset([
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self.opc.BUILD_LIST, self.opc.BUILD_TUPLE,
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self.opc.BUILD_SLICE, self.opc.UNPACK_SEQUENCE,
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self.opc.MAKE_FUNCTION, self.opc.CALL_FUNCTION,
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self.opc.MAKE_CLOSURE, self.opc.CALL_FUNCTION_VAR,
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self.opc.CALL_FUNCTION_KW, self.opc.CALL_FUNCTION_VAR_KW,
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self.opc.DUP_TOPX, self.opc.RAISE_VARARGS])
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# opcodes that store values into a variable
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self.designator_ops = frozenset([
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self.opc.STORE_FAST, self.opc.STORE_NAME,
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self.opc.STORE_GLOBAL, self.opc.STORE_DEREF, self.opc.STORE_ATTR,
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self.opc.STORE_SLICE_0, self.opc.STORE_SLICE_1, self.opc.STORE_SLICE_2,
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self.opc.STORE_SLICE_3, self.opc.STORE_SUBSCR, self.opc.UNPACK_SEQUENCE,
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self.opc.JA
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])
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# Python 2.7 has POP_JUMP_IF_{TRUE,FALSE}_OR_POP but < 2.7 doesn't
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# Add an empty set make processing more uniform.
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self.pop_jump_if_or_pop = frozenset([])
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return
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