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import os
import sys
import tempfile
import subprocess
import utils
from conf import conf
from exceptions import NoSolution
def generate():
"""Collect boolean equations from files: rules, solved and required
And get solution with minisat
Relevant configurations
rules_file
solver_file
required_file
solution_file
"""
# Check if rules_file exist. If it was generated.
if not os.path.isfile(conf.rules_file):
raise Exception("Rules file missing. Run parse_kconfig and check ecistence of " + rules_file)
w_file = tempfile.NamedTemporaryFile(delete=False)
# Join files to one single temporary file
lines = set()
with open(conf.rules_file, 'r') as f:
for lnn in open(conf.rules_file, 'r'):
ln = lnn.rstrip()
if ln not in lines:
lines.add(ln)
if os.path.isfile(conf.solved_file):
for lnn in open(conf.solved_file, 'r'):
ln = lnn.rstrip()
if ln not in lines:
lines.add(ln)
if os.path.isfile(conf.required_file):
for lnn in open(conf.required_file, 'r'):
ln = lnn.rstrip()
if ln not in lines:
lines.add(ln)
with open(conf.symbol_map_file) as f:
for var_num, l in enumerate(f):
pass
var_num += 1
lines_count = len(lines)
first_line = "p cnf " + str(var_num) + " " + str(lines_count)
w_file.write(bytes(first_line + '\n', 'UTF-8'))
for ln in lines:
w_file.write(bytes(ln + ' 0\n', 'UTF-8'))
w_file.close()
# Execute minisat
if conf.minisat_output:
subprocess.call(['minisat', w_file.name, conf.solution_file])
else:
subprocess.call(['minisat', w_file.name, conf.solution_file], stdout=subprocess.DEVNULL)
os.remove(w_file.name)
def apply():
"""Apply generated solution to kernel source.
"""
# Check if solution_file exist
if not os.path.isfile(conf.solution_file):
raise Exception("Solution file is missing. Run sat_solution and check existence of " + conf.solution_file)
utils.build_symbol_map() # Ensure smap existence
# Read solution if satisfiable
with open(conf.solution_file, 'r') as f:
if not f.readline().rstrip() == 'SAT':
raise NoSolution()
solut = f.readline().split()
solut.remove('0') # Remove 0 at the end
# Write negotation solution to solver_file
with open(conf.solved_file, 'a') as f:
for txt in solut:
if txt[0] == '-':
ntx = ""
txt = txt[1:]
else:
ntx = "-"
f.write( ntx + txt + " ")
f.write("\n")
# Write solution to .config file in linux source folder
with open(conf.linux_sources + '/.config', 'w') as f:
with open(conf.dot_config_fragment_file, 'r') as fconf:
for line in fconf:
f.write(line)
for txt in solut:
if txt[0] == '-':
nt = True
txt = txt[1:]
else:
nt = False
if 'NONAMEGEN' in utils.smap[txt]: # ignore generated names
continue
f.write('CONFIG_' + utils.smap[txt] + '=')
if not nt:
f.write('y')
else:
f.write('n')
f.write('\n')
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