| 1 | """Disassembler of Python byte code into mnemonics."""
|
|---|
| 2 |
|
|---|
| 3 | import sys
|
|---|
| 4 | import types
|
|---|
| 5 |
|
|---|
| 6 | from opcode import *
|
|---|
| 7 | from opcode import __all__ as _opcodes_all
|
|---|
| 8 |
|
|---|
| 9 | __all__ = ["dis","disassemble","distb","disco"] + _opcodes_all
|
|---|
| 10 | del _opcodes_all
|
|---|
| 11 |
|
|---|
| 12 | def dis(x=None):
|
|---|
| 13 | """Disassemble classes, methods, functions, or code.
|
|---|
| 14 |
|
|---|
| 15 | With no argument, disassemble the last traceback.
|
|---|
| 16 |
|
|---|
| 17 | """
|
|---|
| 18 | if x is None:
|
|---|
| 19 | distb()
|
|---|
| 20 | return
|
|---|
| 21 | if type(x) is types.InstanceType:
|
|---|
| 22 | x = x.__class__
|
|---|
| 23 | if hasattr(x, 'im_func'):
|
|---|
| 24 | x = x.im_func
|
|---|
| 25 | if hasattr(x, 'func_code'):
|
|---|
| 26 | x = x.func_code
|
|---|
| 27 | if hasattr(x, '__dict__'):
|
|---|
| 28 | items = x.__dict__.items()
|
|---|
| 29 | items.sort()
|
|---|
| 30 | for name, x1 in items:
|
|---|
| 31 | if type(x1) in (types.MethodType,
|
|---|
| 32 | types.FunctionType,
|
|---|
| 33 | types.CodeType,
|
|---|
| 34 | types.ClassType):
|
|---|
| 35 | print "Disassembly of %s:" % name
|
|---|
| 36 | try:
|
|---|
| 37 | dis(x1)
|
|---|
| 38 | except TypeError, msg:
|
|---|
| 39 | print "Sorry:", msg
|
|---|
| 40 | print
|
|---|
| 41 | elif hasattr(x, 'co_code'):
|
|---|
| 42 | disassemble(x)
|
|---|
| 43 | elif isinstance(x, str):
|
|---|
| 44 | disassemble_string(x)
|
|---|
| 45 | else:
|
|---|
| 46 | raise TypeError, \
|
|---|
| 47 | "don't know how to disassemble %s objects" % \
|
|---|
| 48 | type(x).__name__
|
|---|
| 49 |
|
|---|
| 50 | def distb(tb=None):
|
|---|
| 51 | """Disassemble a traceback (default: last traceback)."""
|
|---|
| 52 | if tb is None:
|
|---|
| 53 | try:
|
|---|
| 54 | tb = sys.last_traceback
|
|---|
| 55 | except AttributeError:
|
|---|
| 56 | raise RuntimeError, "no last traceback to disassemble"
|
|---|
| 57 | while tb.tb_next: tb = tb.tb_next
|
|---|
| 58 | disassemble(tb.tb_frame.f_code, tb.tb_lasti)
|
|---|
| 59 |
|
|---|
| 60 | def disassemble(co, lasti=-1):
|
|---|
| 61 | """Disassemble a code object."""
|
|---|
| 62 | code = co.co_code
|
|---|
| 63 | labels = findlabels(code)
|
|---|
| 64 | linestarts = dict(findlinestarts(co))
|
|---|
| 65 | n = len(code)
|
|---|
| 66 | i = 0
|
|---|
| 67 | extended_arg = 0
|
|---|
| 68 | free = None
|
|---|
| 69 | while i < n:
|
|---|
| 70 | c = code[i]
|
|---|
| 71 | op = ord(c)
|
|---|
| 72 | if i in linestarts:
|
|---|
| 73 | if i > 0:
|
|---|
| 74 | print
|
|---|
| 75 | print "%3d" % linestarts[i],
|
|---|
| 76 | else:
|
|---|
| 77 | print ' ',
|
|---|
| 78 |
|
|---|
| 79 | if i == lasti: print '-->',
|
|---|
| 80 | else: print ' ',
|
|---|
| 81 | if i in labels: print '>>',
|
|---|
| 82 | else: print ' ',
|
|---|
| 83 | print repr(i).rjust(4),
|
|---|
| 84 | print opname[op].ljust(20),
|
|---|
| 85 | i = i+1
|
|---|
| 86 | if op >= HAVE_ARGUMENT:
|
|---|
| 87 | oparg = ord(code[i]) + ord(code[i+1])*256 + extended_arg
|
|---|
| 88 | extended_arg = 0
|
|---|
| 89 | i = i+2
|
|---|
| 90 | if op == EXTENDED_ARG:
|
|---|
| 91 | extended_arg = oparg*65536L
|
|---|
| 92 | print repr(oparg).rjust(5),
|
|---|
| 93 | if op in hasconst:
|
|---|
| 94 | print '(' + repr(co.co_consts[oparg]) + ')',
|
|---|
| 95 | elif op in hasname:
|
|---|
| 96 | print '(' + co.co_names[oparg] + ')',
|
|---|
| 97 | elif op in hasjrel:
|
|---|
| 98 | print '(to ' + repr(i + oparg) + ')',
|
|---|
| 99 | elif op in haslocal:
|
|---|
| 100 | print '(' + co.co_varnames[oparg] + ')',
|
|---|
| 101 | elif op in hascompare:
|
|---|
| 102 | print '(' + cmp_op[oparg] + ')',
|
|---|
| 103 | elif op in hasfree:
|
|---|
| 104 | if free is None:
|
|---|
| 105 | free = co.co_cellvars + co.co_freevars
|
|---|
| 106 | print '(' + free[oparg] + ')',
|
|---|
| 107 | print
|
|---|
| 108 |
|
|---|
| 109 | def disassemble_string(code, lasti=-1, varnames=None, names=None,
|
|---|
| 110 | constants=None):
|
|---|
| 111 | labels = findlabels(code)
|
|---|
| 112 | n = len(code)
|
|---|
| 113 | i = 0
|
|---|
| 114 | while i < n:
|
|---|
| 115 | c = code[i]
|
|---|
| 116 | op = ord(c)
|
|---|
| 117 | if i == lasti: print '-->',
|
|---|
| 118 | else: print ' ',
|
|---|
| 119 | if i in labels: print '>>',
|
|---|
| 120 | else: print ' ',
|
|---|
| 121 | print repr(i).rjust(4),
|
|---|
| 122 | print opname[op].ljust(15),
|
|---|
| 123 | i = i+1
|
|---|
|
|---|
