96 lines
3.2 KiB
Python
Executable File
96 lines
3.2 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# This script is used to bisect skip and count arguments for --debug-counter.
|
|
# It is similar to bisect, except it understands how to increase skip and decrease count
|
|
#
|
|
# Typical usage:
|
|
#
|
|
# bisect-skip-count bisect-command.sh "%(skip)d" "%(count)d" 2>&1 | tee bisect.out
|
|
#
|
|
# bisect-command.sh is something like this:
|
|
# #! /bin/bash
|
|
#
|
|
# skip=$1
|
|
# count=$2
|
|
#
|
|
# opt -debug-counter=my-counter-skip=${skip},my-counter-count=${count}
|
|
# ... Test output of opt and exit zero for pass, non-zero for fail
|
|
#
|
|
# Examine bisect.out to look for "Last good skip" and "Last good
|
|
# count" to find the values of the counter that produce a passing
|
|
# result. Incrementing the last good count by one or decrementing the
|
|
# last good skip by one should produce a failure.
|
|
#
|
|
from __future__ import print_function
|
|
import os
|
|
import sys
|
|
import argparse
|
|
# This is for timeout support. Use the recommended way of import.
|
|
# We do timeouts because when doing, execution testing, we have a habit
|
|
# of finding variants that infinite loop
|
|
if os.name == 'posix' and sys.version_info[0] < 3:
|
|
import subprocess32 as subprocess
|
|
else:
|
|
import subprocess
|
|
parser = argparse.ArgumentParser()
|
|
|
|
parser.add_argument('--skipstart', type=int, default=0)
|
|
parser.add_argument('--skipend', type=int, default=(1 << 32))
|
|
parser.add_argument('--countstart', type=int, default=0)
|
|
parser.add_argument('--countend', type=int, default=(1 << 32))
|
|
parser.add_argument('--timeout', type=int, default=None)
|
|
# Use shell support if you need to use complex shell expressions in your command
|
|
parser.add_argument('--shell', type=bool, default=False)
|
|
parser.add_argument('command', nargs='+')
|
|
|
|
args = parser.parse_args()
|
|
|
|
start = args.skipstart
|
|
end = args.skipend
|
|
|
|
print("Bisect of Skip starting!")
|
|
print("Start: %d" % start)
|
|
print("End: %d" % end)
|
|
|
|
last = None
|
|
while start != end and start != end-1:
|
|
count = start + (end - start)//2
|
|
print("Visiting Skip: %d with (Start, End) = (%d,%d)" % (count, start, end))
|
|
cmd = [x % {'skip':count, 'count':-1} for x in args.command]
|
|
print(cmd)
|
|
try:
|
|
result = subprocess.call(cmd, shell=args.shell, timeout=args.timeout)
|
|
if result == 0:
|
|
print(" PASSES! Setting end to count")
|
|
end = count
|
|
else:
|
|
print(" FAILS! Setting start to count")
|
|
start = count
|
|
except:
|
|
print(" TIMEOUT, setting end to count")
|
|
end = count
|
|
firstcount = start
|
|
print("Last good skip: %d" % start)
|
|
start = args.countstart
|
|
end = args.countend
|
|
print("Bisect of Count starting!")
|
|
print("Start: %d" % start)
|
|
print("End: %d" % end)
|
|
while start != end and start != end-1:
|
|
count = start + (end - start)//2
|
|
print("Visiting Count: %d with (Start, End) = (%d,%d)" % (count, start, end))
|
|
cmd = [x % {'count':count, 'skip':firstcount } for x in args.command]
|
|
print(cmd)
|
|
try:
|
|
result = subprocess.call(cmd, shell=args.shell, timeout=args.timeout)
|
|
if result == 0:
|
|
print(" PASSES! Setting start to count")
|
|
start = count
|
|
else:
|
|
print(" FAILS! Setting end to count")
|
|
end = count
|
|
except:
|
|
print(" TIMEOUT, setting start to count")
|
|
start = count
|
|
|
|
print("Last good count: %d" % start)
|