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1 #!/usr/bin/env python
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2 # This script is used to bisect skip and count arguments for --debug-counter.
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3 # It is similar to bisect, except it understands how to increase skip and decrease count
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4 import os
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5 import sys
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6 import argparse
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7 # This is for timeout support. Use the recommended way of import.
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8 # We do timeouts because when doing, execution testing, we have a habit
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9 # of finding variants that infinite loop
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10 if os.name == 'posix' and sys.version_info[0] < 3:
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11 import subprocess32 as subprocess
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12 else:
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13 import subprocess
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14 parser = argparse.ArgumentParser()
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15
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16 parser.add_argument('--skipstart', type=int, default=0)
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17 parser.add_argument('--skipend', type=int, default=(1 << 32))
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18 parser.add_argument('--countstart', type=int, default=0)
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19 parser.add_argument('--countend', type=int, default=(1 << 32))
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20 parser.add_argument('--timeout', type=int, default=None)
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21 # Use shell support if you need to use complex shell expressions in your command
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22 parser.add_argument('--shell', type=bool, default=False)
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23 parser.add_argument('command', nargs='+')
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24
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25 args = parser.parse_args()
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26
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27 start = args.skipstart
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28 end = args.skipend
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29
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30 print("Bisect of Skip starting!")
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31 print("Start: %d" % start)
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32 print("End: %d" % end)
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33
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34 last = None
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35 while start != end and start != end-1:
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36 count = start + (end - start)/2
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37 print("Visiting Skip: %d with (Start, End) = (%d,%d)" % (count, start, end))
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38 cmd = [x % {'skip':count, 'count':-1} for x in args.command]
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39 print cmd
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40 try:
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41 result = subprocess.call(cmd, shell=args.shell, timeout=args.timeout)
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42 if result == 0:
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43 print(" PASSES! Setting end to count")
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44 end = count
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45 else:
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46 print(" FAILS! Setting start to count")
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47 start = count
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48 except:
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49 print(" TIMEOUT, setting end to count")
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50 end = count
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51 firstcount = start
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52 print("Last good skip: %d" % start)
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53 start = args.countstart
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54 end = args.countend
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55 print("Bisect of Count starting!")
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56 print("Start: %d" % start)
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57 print("End: %d" % end)
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58 while start != end and start != end-1:
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59 count = start + (end - start)/2
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60 print("Visiting Count: %d with (Start, End) = (%d,%d)" % (count, start, end))
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61 cmd = [x % {'count':count, 'skip':firstcount } for x in args.command]
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62 print cmd
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63 try:
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64 result = subprocess.call(cmd, shell=args.shell, timeout=args.timeout)
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65 if result == 0:
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66 print(" PASSES! Setting start to count")
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67 start = count
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68 else:
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69 print(" FAILS! Setting end to count")
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70 end = count
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71 except:
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72 print(" TIMEOUT, setting start to count")
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73 start = count
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74
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75 print("Last good count: %d" % start)
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