scripts/configurations.py

   1 import os
   2 import sys
   3 import tempfile
   4 import shutil
   5 import subprocess
   6 import time
   7 import hashlib
   8
   9 import utils
  10 from conf import conf
  11 from conf import sf
  12 import exceptions
  13 import database
  14
  15 def __buildtempcnf__(variable_count, files, strlines):
  16         """ Builds temporally file for cnf formulas
  17           variable_count - number of variables in formulas
  18           files          - list of files with formulas
  19           strlines       - list of string lines with formulas"""
  20         lines = set()
  21         # Copy strlines
  22         for ln in strlines:
  23                 lines.add(ln)
  24         # Files
  25         for file in files:
  26                 with open(file, 'r') as f:
  27                         for ln in f:
  28                                 lines.add(ln.rstrip())
  29
  30         first_line = "p cnf " + str(variable_count) + " " + str(len(lines))
  31
  32         wfile = tempfile.NamedTemporaryFile(delete=False)
  33         wfile.write(bytes(first_line + '\n', 'UTF-8'))
  34         for ln in lines:
  35                 wfile.write(bytes(ln + ' 0\n', 'UTF-8'))
  36         wfile.close()
  37         return wfile.name
  38
  39 def __exec_sat__(file, args):
  40         """Executes SAT solver and returns configuration."""
  41         picosat_cmd = [sf(conf.picosat), file]
  42         picosat_cmd += conf.picosat_args
  43         stdout = utils.callsubprocess('picosat', picosat_cmd, conf.picosat_output,
  44                         True, allow_all_exit_codes = True)
  45
  46         rtn = []
  47         solut = []
  48         for line in stdout:
  49                 if line[0] == 's':
  50                         try:
  51                                 solut.remove(0)
  52                                 rtn.append(solut)
  53                         except ValueError:
  54                                 pass
  55                         solut = []
  56                         if not line.rstrip() == 's SATISFIABLE':
  57                                 raise exceptions.NoSolution()
  58                 elif line[0] == 'v':
  59                         for sl in line[2:].split():
  60                                 solut.append(int(sl))
  61         try:
  62                 solut.remove(0)
  63                 rtn.append(solut)
  64         except ValueError:
  65                 pass
  66         return rtn
  67
  68 def __txt_config__(con, conf_num):
  69         # Ensure smap existence
  70         utils.build_symbol_map()
  71         # Write temporally file
  72         txt = ''
  73         for s in con:
  74                 if s < 0:
  75                         nt = True
  76                         s *= -1
  77                 else:
  78                         nt = False
  79                 if s > int(conf_num):
  80                         break;
  81                 if 'NONAMEGEN' in utils.smap[s]: # ignore generated names
  82                         continue
  83                 txt += 'CONFIG_' + utils.smap[s] + '='
  84                 if not nt:
  85                         txt += 'y'
  86                 else:
  87                         txt += 'n'
  88                 txt += '\n'
  89         return txt
  90
  91 def __write_temp_config_file__(con, conf_num):
  92         wfile = tempfile.NamedTemporaryFile(delete=False)
  93         txt = __txt_config__(con, conf_num)
  94         wfile.write(bytes(txt, sys.getdefaultencoding()))
  95         wfile.close()
  96         return wfile.name
  97
  98 def __load_config_text__(txt):
  99         rtn = dict()
 100         for ln in txt:
 101                 if ln[0] == '#' or not '=' in ln:
 102                         continue
 103                 indx = ln.index('=')
 104                 if (ln[indx + 1] == 'y'):
 105                         rtn[ln[7:indx]] = True
 106                 else:
 107                         rtn[ln[7:indx]] = False
 108         return rtn
 109
 110
 111 def __load_config_file__(file):
 112         f = open(file, 'r')
 113         rtn = __load_config_text__(f)
 114         f.close()
 115         return rtn
 116
 117 def __calchash__(con):
 118         dt = database.database()
 119         csort = dt.get_configsort()
 120
 121         cstr = ""
 122         for c in csort:
 123                 try:
 124                         if con[c]:
 125                                 cstr += c
 126                 except ValueError:
 127                         pass
 128
 129         # Add missing
 130         for key, val in con.items():
 131                 try:
 132                         csort.index(key)
 133                 except ValueError:
 134                         indx = len(csort)
 135                         csort.append(key)
 136                         dt.add_configsort(key)
 137                         if val:
 138                                 cstr += key
 139
 140         hsh = hashlib.md5(bytes(cstr, 'UTF-8'))
 141         return hsh.hexdigest()
 142
 143
 144 def __calchash_file__(file):
 145         """Calculates hash from configuration file"""
 146         con = __load_config_file__(file)
 147         return __calchash__(con)
 148
 149 def __register_conf__(con, conf_num, generator):
 150         dtb = database.database()
 151         # Solution to configuration
 152         txtconfig = __txt_config__(con, conf_num)
 153         hsh = __calchash__(con)
 154         cconf = dtb.get_configration(hsh)
 155         for cc in cconf:
 156                 print('hash: ' + hsh)
 157                 if compare_text(cc, txtconfig):
 158                         print("I: Generated existing configuration.")
 159                         return False
 160                 else:
 161                         print("W: Generated configuration with collision hash.")
 162                         # TODO this might have to be tweaked
 163                         raise Exception()
 164         dtb.add_configuration(hsh, txtconfig, generator)
 165         return True
 166
 167 def __generate_single__(var_num, conf_num):
 168         measure_list = set()
 169         if not os.path.isfile(sf(conf.single_generated_file)):
 170                 with open(sf(conf.measure_file), 'r') as fi:
 171                         for ln in fi:
 172                                 measure_list.add(int(ln))
 173         else:
 174                 with open(sf(conf.single_generated_file), 'r') as f:
 175                         for ln in f:
 176                                 measure_list.add(int(ln))
 177         if not measure_list:
 178                 return False
 179         tfile = __buildtempcnf__(var_num, (sf(conf.rules_file),
 180                 sf(conf.fixed_file)), [str(measure_list.pop())])
 181         with open(sf(conf.single_generated_file), 'w') as fo:
 182                 for ln in measure_list:
 183                         fo.write(str(ln) + '\n')
 184         try:
 185                 confs = __exec_sat__(tfile, ['-i', '0'])
 186                 for con in confs:
 187                         __register_conf__(con, conf_num, 'single-sat')
 188         except exceptions.NoSolution:
 189                 return __generate_single__(var_num, conf_num)
 190         finally:
 191                 os.remove(tfile)
 192         return True
 193
 194 def __generate_random__(var_num, conf_num):
 195         tfile = __buildtempcnf__(var_num, (sf(conf.rules_file), sf(conf.fixed_file)), set())
 196         try:
 197                 confs = __exec_sat__(tfile, ['-i', '3'])
 198                 for con in confs:
 199                         if not __register_conf__(con, conf_num, 'random-sat'):
 200                                 __generate_random__(var_num, conf_num)
 201         finally:
 202                 os.remove(tfile)
 203         return True
 204
 205 def generate():
 206         """Collect boolean equations from files rules and required
 207         And get solution with picosat
 208         """
 209         # Check if rules_file exist. If it was generated.
 210         if not os.path.isfile(sf(conf.rules_file)):
 211                 raise exceptions.MissingFile(conf.rules_file,"Run parse_kconfig.")
 212         if not os.path.isfile(sf(conf.fixed_file)):
 213                 raise exceptions.MissingFile(conf.required_file,"Run allconfig and initialization process.")
 214
 215         # Load variable count
 216         with open(sf(conf.variable_count_file)) as f:
 217                 var_num = f.readline().rstrip()
 218                 conf_num = f.readline().rstrip()
 219
 220         if __generate_single__(var_num, conf_num):
 221                 return
 222         elif __generate_random__(var_num, conf_num):
 223                 return
 224
 225         raise exceptions.NoNewConfiguration()
 226
 227 def compare(conf1, conf2):
 228         # This is not exactly best comparison method
 229         for key, val in conf1.items():
 230                 try:
 231                         if conf2[key] != val:
 232                                 return False
 233                 except ValueError:
 234                         return False
 235         for key, val in conf2.items():
 236                 try:
 237                         if conf1[key] != val:
 238                                 return False
 239                 except ValueError:
 240                         return False
 241         return True
 242
 243 def compare_text(text1, text2):
 244         conf1 = __load_config_text__(text1)
 245         conf2 = __load_config_text__(text2)
 246         return compare_file(conf1, conf2)
 247
 248 def compare_file(file1, file2):
 249         """Compared two configuration"""
 250         conf1 = __load_config_file__(file1)
 251         conf2 = __load_config_file__(file2)
 252         return compare_file(conf1, conf2)