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Copy pathparsexbug.py
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245 lines (183 loc) · 7.28 KB
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#!/usr/bin/python
import sys
import os
import pprint
import struct
# Change path so we find Xlib
sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
def dummy_buffer(str, x, y = sys.maxint):
return str[x:y]
__builtins__.buffer = dummy_buffer
from Xlib.protocol import display, request, rq, event
from Xlib import error
# We don't want any fancy dictwrapper, just plain mappings
rq.DictWrapper = lambda x: x
class BugFile(object):
def __init__(self, file):
self.file = file
self.cbuf = self.sbuf = ''
def read_client(self, bytes):
while len(self.cbuf) < bytes and self.file:
self.read_next()
d = self.cbuf[:bytes]
self.cbuf = self.cbuf[bytes:]
return d
def read_server(self, bytes):
while len(self.sbuf) < bytes and self.file:
self.read_next()
d = self.sbuf[:bytes]
self.sbuf = self.sbuf[bytes:]
return d
def read_next(self):
line = self.file.readline()
if line == '':
self.file = None
return
src = line[0]
length = int(line[1:-1])
data = self.file.read(length)
if src == 'C':
self.cbuf = self.cbuf + data
elif src == 'S':
self.sbuf = self.sbuf + data
else:
raise ValueError('Bad control line: %s' % line)
class ParseString(object):
def __init__(self, datafunc):
self.get_data = datafunc
self.data = ''
def __getitem__(self, key):
if not isinstance(key, slice):
if key < 0:
raise ValueError('bad string index: {0}'.format(key))
if len(self.data) <= key:
if not self.get_data:
raise RuntimeError('attempt to allocate more data after returning a new ParseString')
self.data = self.data + self.get_data(key - len(self.data) + 1)
return self.data[key]
else:
# replacement of __getslice__
i = key.start
j = key.stop
if j == sys.maxint:
if self.get_data:
ps = ParseString(self.get_data)
self.get_data = None
return ps
else:
raise RuntimeError('attempt to allocate another ParseString')
if i < 0 or j < 0 or i > j:
raise ValueError('bad slice indices: [%d:%d]' % (i, j))
if len(self.data) < j:
if not self.get_data:
raise RuntimeError('attempt to allocate more data after returning a new ParseString')
self.data = self.data + self.get_data(j - len(self.data))
return self.data[i:j]
class DummyDisplay(object):
def get_resource_class(self, name):
return None
class ParseXbug(object):
def __init__(self, infile = sys.stdin, outfile = sys.stdout):
bf = BugFile(infile)
self.cdata = ParseString(bf.read_client)
sdata = ParseString(bf.read_server)
self.outfile = outfile
self.xpprint = pprint.PrettyPrinter(indent = 2, stream = outfile)
self.disp = DummyDisplay()
# Parse client setup request
r, self.cdata = display.ConnectionSetupRequest._request.parse_binary(self.cdata, self.disp)
self.print_xbug('request', 'ConnectionSetup', r)
# Parse server reply
r, sdata = display.ConnectionSetupRequest._reply.parse_binary(sdata, self.disp)
extra = r['additional_length'] * 4
del r['additional_length']
extradata = sdata[:extra]
sdata = sdata[extra:]
if r['status'] == 0:
r['reason'] = extradata[:r['reason_length']]
del r['status']
del r['reason_length']
self.print_xbug('error', 'ConnectionSetup', r)
return
elif r['status'] == 1:
r2, d = display.ConnectionSetupRequest._success_reply.parse_binary(extradata, self.disp)
del r['status']
del r['reason_length']
r.update(r2)
del r2
self.print_xbug('reply', 'ConnectionSetup', r)
else:
raise ValueError('bad connection setup reply status: %d' % r['status'])
self.last_serial = 0
self.last_request = None
while 1:
# Get next server item, always at least 32 bytes
d = sdata[:32]
if len(d) != 32:
# Print out remaining requests
try:
self.get_requests(sys.maxint)
except ValueError:
pass
return
sdata = sdata[32:]
# Check type
t = ord(d[0])
# Error
if t == 0:
# Code is second byte
code = ord(d[1])
# Fetch error class
estruct = error.xerror_class.get(code, error.XError)
r, d = estruct._fields.parse_binary(d, self.disp)
del r['type']
self.get_requests(r['sequence_number'])
self.print_xbug('error', estruct.__name__, r)
# Reply
elif t == 1:
# Get sequence number, and read corresponding request
sno = struct.unpack('=H', d[2:4])[0]
self.get_requests(sno)
# Get entire reply length
rlen = int(struct.unpack('=L', d[4:8])[0]) * 4
d = d + sdata[:rlen]
sdata = sdata[rlen:]
if self.last_request:
r, d = self.last_request._reply.parse_binary(d, self.disp)
self.print_xbug('reply', self.last_request.__name__, r)
else:
self.print_xbug('reply', 'Unknown',
{ 'sequence_number': sno })
# Some event
else:
estruct = event.event_class.get(t, event.AnyEvent)
r, d = estruct._fields.parse_binary(d, self.disp)
self.get_requests(r['sequence_number'])
self.print_xbug('event', estruct.__name__, r)
def get_requests(self, serial):
# Get request length
while self.last_serial < serial:
d = self.cdata[2:4]
if len(d) != 2:
raise ValueError('client request missing')
rlen = struct.unpack('=H', d)[0] * 4
d = self.cdata[:rlen]
if len(d) != rlen:
raise ValueError('client request missing')
self.cdata = self.cdata[rlen:]
opcode = ord(d[0])
self.last_request = request.major_codes.get(opcode)
self.last_serial = self.last_serial + 1
if self.last_request:
r, d = self.last_request._request.parse_binary(d, self.disp)
r['sequence_number'] = self.last_serial
self.print_xbug('request', self.last_request.__name__, r)
else:
self.print_xbug('request', 'Unknown (%d)' % opcode,
{ 'sequence_number': self.last_serial })
def print_xbug(self, rtype, name, data):
self.outfile.write('%-8s %s\n' % (rtype + ':', name))
self.xpprint.pprint(data)
self.outfile.write('\n')
if __name__ == '__main__':
ParseXbug()