# Disassembler import sys import string def dis(): tb = sys.last_traceback while tb.tb_next: tb = tb.tb_next distb(tb) def distb(tb): disassemble(tb.tb_frame.f_code, tb.tb_lasti) def disco(co): disassemble(co, -1) def disassemble(co, lasti): code = co.co_code labels = findlabels(code) n = len(code) i = 0 while i < n: c = code[i] op = ord(c) if op == SET_LINENO and i > 0: print # Extra blank line if i == lasti: print '-->', else: print ' ', if i in labels: print '>>', else: print ' ', print string.rjust(`i`, 4), print string.ljust(opname[op], 15), i = i+1 if op >= HAVE_ARGUMENT: oparg = ord(code[i]) + ord(code[i+1])*256 i = i+2 print string.rjust(`oparg`, 5), if op in hasconst: print '(' + `co.co_consts[oparg]` + ')', elif op in hasname: print '(' + co.co_names[oparg] + ')', elif op in hasjrel: print '(to ' + `i + oparg` + ')', elif op in haslocal: print '(' + co.co_varnames[oparg] + ')', elif op in hascompare: print '(' + cmp_op[oparg] + ')', print def findlabels(code): labels = [] n = len(code) i = 0 while i < n: c = code[i] op = ord(c) i = i+1 if op >= HAVE_ARGUMENT: oparg = ord(code[i]) + ord(code[i+1])*256 i = i+2 label = -1 if op in hasjrel: label = i+oparg elif op in hasjabs: label = oparg if label >= 0: if label not in labels: labels.append(label) return labels cmp_op = ('<', '<=', '==', '!=', '>', '>=', 'in', 'not in', 'is', 'is not', 'exception match', 'BAD') hasconst = [] hasname = [] hasjrel = [] hasjabs = [] haslocal = [] hascompare = [] opname = [''] * 256 for op in range(256): opname[op] = '<' + `op` + '>' def def_op(name, op): opname[op] = name def name_op(name, op): opname[op] = name hasname.append(op) def jrel_op(name, op): opname[op] = name hasjrel.append(op) def jabs_op(name, op): opname[op] = name hasjabs.append(op) # Instruction opcodes for compiled code def_op('STOP_CODE', 0) def_op('POP_TOP', 1) def_op('ROT_TWO', 2) def_op('ROT_THREE', 3) def_op('DUP_TOP', 4) def_op('UNARY_POSITIVE', 10) def_op('UNARY_NEGATIVE', 11) def_op('UNARY_NOT', 12) def_op('UNARY_CONVERT', 13) def_op('UNARY_CALL', 14) def_op('UNARY_INVERT', 15) def_op('BINARY_POWER', 19) def_op('BINARY_MULTIPLY', 20) def_op('BINARY_DIVIDE', 21) def_op('BINARY_MODULO', 22) def_op('BINARY_ADD', 23) def_op('BINARY_SUBTRACT', 24) def_op('BINARY_SUBSCR', 25) def_op('BINARY_CALL', 26) def_op('SLICE+0', 30) def_op('SLICE+1', 31) def_op('SLICE+2', 32) def_op('SLICE+3', 33) def_op('STORE_SLICE+0', 40) def_op('STORE_SLICE+1', 41) def_op('STORE_SLICE+2', 42) def_op('STORE_SLICE+3', 43) def_op('DELETE_SLICE+0', 50) def_op('DELETE_SLICE+1', 51) def_op('DELETE_SLICE+2', 52) def_op('DELETE_SLICE+3', 53) def_op('STORE_SUBSCR', 60) def_op('DELETE_SUBSCR', 61) def_op('BINARY_LSHIFT', 62) def_op('BINARY_RSHIFT', 63) def_op('BINARY_AND', 64) def_op('BINARY_XOR', 65) def_op('BINARY_OR', 66) def_op('PRINT_EXPR', 70) def_op('PRINT_ITEM', 71) def_op('PRINT_NEWLINE', 72) def_op('BREAK_LOOP', 80) def_op('RAISE_EXCEPTION', 81) def_op('LOAD_LOCALS', 82) def_op('RETURN_VALUE', 83) def_op('EXEC_STMT', 85) def_op('BUILD_FUNCTION', 86) def_op('POP_BLOCK', 87) def_op('END_FINALLY', 88) def_op('BUILD_CLASS', 89) HAVE_ARGUMENT = 90 # Opcodes from here have an argument: name_op('STORE_NAME', 90) # Index in name list name_op('DELETE_NAME', 91) # "" def_op('UNPACK_TUPLE', 92) # Number of tuple items def_op('UNPACK_LIST', 93) # Number of list items def_op('UNPACK_ARG', 94) # Number of arguments expected name_op('STORE_ATTR', 95) # Index in name list name_op('DELETE_ATTR', 96) # "" name_op('STORE_GLOBAL', 97) # "" name_op('DELETE_GLOBAL', 98) # "" name_op('UNPACK_VARARG', 99) # Minimal number of arguments def_op('LOAD_CONST', 100) # Index in const list hasconst.append(100) name_op('LOAD_NAME', 101) # Index in name list hascompare.append(106) def_op('BUILD_TUPLE', 102) # Number of tuple items def_op('BUILD_LIST', 103) # Number of list items def_op('BUILD_MAP', 104) # Always zero for now name_op('LOAD_ATTR', 105) # Index in name list def_op('COMPARE_OP', 106) # Comparison operator name_op('IMPORT_NAME', 107) # Index in name list name_op('IMPORT_FROM', 108) # Index in name list jrel_op('JUMP_FORWARD', 110) # Number of bytes to skip jrel_op('JUMP_IF_FALSE', 111) # "" jrel_op('JUMP_IF_TRUE', 112) # "" jabs_op('JUMP_ABSOLUTE', 113) # Target byte offset from beginning of code jrel_op('FOR_LOOP', 114) # Number of bytes to skip name_op('LOAD_LOCAL', 115) # Index in name list name_op('LOAD_GLOBAL', 116) # Index in name list def_op('SET_FUNC_ARGS', 117) # Argcount jrel_op('SETUP_LOOP', 120) # Distance to target address jrel_op('SETUP_EXCEPT', 121) # "" jrel_op('SETUP_FINALLY', 122) # "" def_op('LOAD_FAST', 124) # Local variable number haslocal.append(124) def_op('STORE_FAST', 125) # Local variable number haslocal.append(125) def_op('DELETE_FAST', 126) # Local variable number haslocal.append(126) def_op('SET_LINENO', 127) # Current line number SET_LINENO = 127 def_op('RAISE_VARARGS', 130) def_op('CALL_FUNCTION', 131) def_op('MAKE_FUNCTION', 132) def_op('BUILD_SLICE', 133)