1 #!/usr/bin/env python 2 3 import os 4 import sys 5 import argparse 6 import subprocess 7 8 parser = argparse.ArgumentParser() 9 10 parser.add_argument('--start', type=int, default=0) 11 parser.add_argument('--end', type=int, default=(1 << 32)) 12 parser.add_argument('command', nargs='+') 13 14 args = parser.parse_args() 15 16 start = args.start 17 end = args.end 18 19 print("Bisect Starting!") 20 print("Start: %d" % start) 21 print("End: %d" % end) 22 23 last = None 24 while start != end and start != end-1: 25 count = start + (end - start)/2 26 print("Visiting Count: %d with (Start, End) = (%d,%d)" % (count, start, end)) 27 cmd = [x % {'count':count} for x in args.command] 28 print cmd 29 result = subprocess.call(cmd) 30 if result == 0: 31 print(" PASSES! Setting start to count") 32 start = count 33 else: 34 print(" FAILS! Setting end to count") 35 end = count 36 37 print("Last good count: %d" % start) 38
