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main.py
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# Copyright (C) 2018 Rocky Bernstein <rocky@gnu.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from __future__ import print_function
import datetime, os, subprocess, sys, tempfile
from uncompyle6 import verify, IS_PYPY, PYTHON_VERSION
from xdis.code import iscode
from xdis.magics import sysinfo2float
from uncompyle6.disas import check_object_path
from uncompyle6.semantics import pysource
from uncompyle6.parser import ParserError
from uncompyle6.version import VERSION
# from uncompyle6.linenumbers import line_number_mapping
from uncompyle6.semantics.pysource import code_deparse
from uncompyle6.semantics.fragments import code_deparse as code_deparse_fragments
from uncompyle6.semantics.linemap import deparse_code_with_map
from xdis.load import load_module
def _get_outstream(outfile):
dir = os.path.dirname(outfile)
failed_file = outfile + '_failed'
if os.path.exists(failed_file):
os.remove(failed_file)
try:
os.makedirs(dir)
except OSError:
pass
if PYTHON_VERSION < 3.0:
return open(outfile, mode='wb')
else:
return open(outfile, mode='w', encoding='utf-8')
def decompile(
bytecode_version, co, out=None, showasm=None, showast=False,
timestamp=None, showgrammar=False, code_objects={},
source_size=None, is_pypy=None, magic_int=None,
mapstream=None, do_fragments=False):
"""
ingests and deparses a given code block 'co'
if `bytecode_version` is None, use the current Python intepreter
version.
Caller is responsible for closing `out` and `mapstream`
"""
if bytecode_version is None:
bytecode_version = sysinfo2float()
# store final output stream for case of error
real_out = out or sys.stdout
def write(s):
s += '\n'
real_out.write(s)
assert iscode(co)
co_pypy_str = 'PyPy ' if is_pypy else ''
run_pypy_str = 'PyPy ' if IS_PYPY else ''
sys_version_lines = sys.version.split('\n')
write('# uncompyle6 version %s\n'
'# %sPython bytecode %s%s\n# Decompiled from: %sPython %s' %
(VERSION, co_pypy_str, bytecode_version,
" (%s)" % str(magic_int) if magic_int else "",
run_pypy_str, '\n# '.join(sys_version_lines)))
if co.co_filename:
write('# Embedded file name: %s' % co.co_filename,)
if timestamp:
write('# Compiled at: %s' % datetime.datetime.fromtimestamp(timestamp))
if source_size:
write('# Size of source mod 2**32: %d bytes' % source_size)
debug_opts = {
'asm': showasm,
'ast': showast,
'grammar': showgrammar
}
try:
if mapstream:
if isinstance(mapstream, str):
mapstream = _get_outstream(mapstream)
deparsed = deparse_code_with_map(bytecode_version, co, out, showasm, showast,
showgrammar,
code_objects = code_objects,
is_pypy = is_pypy,
)
header_count = 3+len(sys_version_lines)
linemap = [(line_no, deparsed.source_linemap[line_no]+header_count)
for line_no in
sorted(deparsed.source_linemap.keys())]
mapstream.write("\n\n# %s\n" % linemap)
else:
if do_fragments:
deparse_fn = code_deparse_fragments
else:
deparse_fn = code_deparse
deparsed = deparse_fn(co, out, bytecode_version,
debug_opts = debug_opts,
is_pypy=is_pypy)
pass
return deparsed
except pysource.SourceWalkerError as e:
# deparsing failed
raise pysource.SourceWalkerError(str(e))
def decompile_file(filename, outstream=None, showasm=None, showast=False,
showgrammar=False, mapstream=None, do_fragments=False):
"""
decompile Python byte-code file (.pyc). Return objects to
all of the deparsed objects found in `filename`.
"""
filename = check_object_path(filename)
code_objects = {}
(version, timestamp, magic_int, co, is_pypy,
source_size) = load_module(filename, code_objects)
if isinstance(co, list):
deparsed = []
for con in co:
deparsed.append(
decompile(version, con, outstream, showasm, showast,
timestamp, showgrammar, code_objects=code_objects,
is_pypy=is_pypy, magic_int=magic_int),
mapstream=mapstream)
else:
deparsed = [decompile(version, co, outstream, showasm, showast,
timestamp, showgrammar,
code_objects=code_objects, source_size=source_size,
is_pypy=is_pypy, magic_int=magic_int,
mapstream=mapstream, do_fragments=do_fragments)]
co = None
return deparsed
# FIXME: combine into an options parameter
def main(in_base, out_base, files, codes, outfile=None,
showasm=None, showast=False, do_verify=False,
showgrammar=False, raise_on_error=False,
do_linemaps=False, do_fragments=False):
"""
in_base base directory for input files
out_base base directory for output files (ignored when
files list of filenames to be uncompyled (relative to in_base)
outfile write output to this filename (overwrites out_base)
Note: `codes` is not use. Historical compatability?
For redirecting output to
- <filename> outfile=<filename> (out_base is ignored)
- files below out_base out_base=...
- stdout out_base=None, outfile=None
"""
tot_files = okay_files = failed_files = verify_failed_files = 0
current_outfile = outfile
linemap_stream = None
for filename in files:
infile = os.path.join(in_base, filename)
# print("XXX", infile)
if not os.path.exists(infile):
sys.stderr.write("File '%s' doesn't exist. Skipped\n"
% infile)
continue
if do_linemaps:
linemap_stream = infile + '.pymap'
pass
# print (infile, file=sys.stderr)
if outfile: # outfile was given as parameter
outstream = _get_outstream(outfile)
elif out_base is None:
outstream = sys.stdout
if do_linemaps:
linemap_stream = sys.stdout
if do_verify:
prefix = os.path.basename(filename) + '-'
if prefix.endswith('.py'):
prefix = prefix[:-len('.py')]
# Unbuffer output if possible
buffering = -1 if sys.stdout.isatty() else 0
if PYTHON_VERSION >= 3.5:
t = tempfile.NamedTemporaryFile(mode='w+b',
buffering=buffering,
suffix='.py',
prefix=prefix)
else:
t = tempfile.NamedTemporaryFile(mode='w+b',
suffix='.py',
prefix=prefix)
current_outfile = t.name
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', buffering)
tee = subprocess.Popen(["tee", current_outfile],
stdin=subprocess.PIPE)
os.dup2(tee.stdin.fileno(), sys.stdout.fileno())
os.dup2(tee.stdin.fileno(), sys.stderr.fileno())
else:
if filename.endswith('.pyc'):
current_outfile = os.path.join(out_base, filename[0:-1])
else:
current_outfile = os.path.join(out_base, filename) + '_dis'
pass
pass
outstream = _get_outstream(current_outfile)
# print(current_outfile, file=sys.stderr)
# Try to uncompile the input file
try:
deparsed = decompile_file(infile, outstream, showasm, showast, showgrammar,
linemap_stream, do_fragments)
if do_fragments:
for d in deparsed:
last_mod = None
offsets = d.offsets
for e in sorted([k for k in offsets.keys() if isinstance(k[1], int)]):
if e[0] != last_mod:
line = '=' * len(e[0])
outstream.write("%s\n%s\n%s\n" % (line, e[0], line))
last_mod = e[0]
info = offsets[e]
extractInfo = d.extract_node_info(info)
outstream.write("%s" % info.node.format().strip() + "\n")
outstream.write(extractInfo.selectedLine + "\n")
outstream.write(extractInfo.markerLine + "\n\n")
pass
pass
tot_files += 1
except (ValueError, SyntaxError, ParserError, pysource.SourceWalkerError) as e:
sys.stdout.write("\n")
sys.stderr.write("\n# file %s\n# %s\n" % (infile, e))
failed_files += 1
tot_files += 1
except KeyboardInterrupt:
if outfile:
outstream.close()
os.remove(outfile)
sys.stdout.write("\n")
sys.stderr.write("\nLast file: %s " % (infile))
raise
# except:
# failed_files += 1
# if current_outfile:
# outstream.close()
# os.rename(current_outfile, current_outfile + '_failed')
# else:
# sys.stderr.write("\n# %s" % sys.exc_info()[1])
# sys.stderr.write("\n# Can't uncompile %s\n" % infile)
else: # uncompile successful
if current_outfile:
outstream.close()
if do_verify:
try:
msg = verify.compare_code_with_srcfile(infile,
current_outfile,
do_verify)
if not current_outfile:
if not msg:
print('\n# okay decompiling %s' % infile)
okay_files += 1
else:
verify_failed_files += 1
print('\n# %s\n\t%s', infile, msg)
pass
else:
okay_files += 1
pass
except verify.VerifyCmpError as e:
print(e)
verify_failed_files += 1
os.rename(current_outfile, current_outfile + '_unverified')
sys.stderr.write("### Error Verifying %s\n" % filename)
sys.stderr.write(str(e) + "\n")
if not outfile:
if raise_on_error:
raise
pass
pass
pass
else:
okay_files += 1
pass
elif do_verify:
sys.stderr.write("\n### uncompile successful, but no file to compare against\n")
pass
else:
okay_files += 1
if not current_outfile:
mess = '\n# okay decompiling'
# mem_usage = __memUsage()
print(mess, infile)
if current_outfile:
sys.stdout.write("%s\r" %
status_msg(do_verify, tot_files, okay_files, failed_files,
verify_failed_files, do_verify))
try:
# FIXME: Something is weird with Pypy here
sys.stdout.flush()
except:
pass
if current_outfile:
sys.stdout.write("\n")
try:
# FIXME: Something is weird with Pypy here
sys.stdout.flush()
except:
pass
pass
return (tot_files, okay_files, failed_files, verify_failed_files)
# ---- main ----
if sys.platform.startswith('linux') and os.uname()[2][:2] in ['2.', '3.', '4.']:
def __memUsage():
mi = open('/proc/self/stat', 'r')
mu = mi.readline().split()[22]
mi.close()
return int(mu) / 1000000
else:
def __memUsage():
return ''
def status_msg(do_verify, tot_files, okay_files, failed_files,
verify_failed_files, weak_verify):
if weak_verify == 'weak':
verification_type = 'weak '
elif weak_verify == 'verify-run':
verification_type = 'run '
else:
verification_type = ''
if tot_files == 1:
if failed_files:
return "\n# decompile failed"
elif verify_failed_files:
return "\n# decompile %sverification failed" % verification_type
else:
return "\n# Successfully decompiled file"
pass
pass
mess = "decompiled %i files: %i okay, %i failed" % (tot_files, okay_files, failed_files)
if do_verify:
mess += (", %i %sverification failed" % (verify_failed_files, verification_type))
return mess