arch/ia64/scripts/unwcheck.py

   1 #!/usr/bin/env python
   2 #
   3 # Usage: unwcheck.py FILE
   4 #
   5 # This script checks the unwind info of each function in file FILE
   6 # and verifies that the sum of the region-lengths matches the total
   7 # length of the function.
   8 #
   9 # Based on a shell/awk script originally written by Harish Patil,
  10 # which was converted to Perl by Matthew Chapman, which was converted
  11 # to Python by David Mosberger.
  12 #
  13 import os
  14 import re
  15 import sys
  16
  17 if len(sys.argv) != 2:
  18     print "Usage: %s FILE" % sys.argv[0]
  19     sys.exit(2)
  20
  21 readelf = os.getenv("READELF", "readelf")
  22
  23 start_pattern = re.compile("<([^>]*)>: \[0x([0-9a-f]+)-0x([0-9a-f]+)\]")
  24 rlen_pattern  = re.compile(".*rlen=([0-9]+)")
  25
  26 def check_func (func, slots, rlen_sum):
  27     if slots != rlen_sum:
  28         global num_errors
  29         num_errors += 1
  30         if not func: func = "[%#x-%#x]" % (start, end)
  31         print "ERROR: %s: %lu slots, total region length = %lu" % (func, slots, rlen_sum)
  32     return
  33
  34 num_funcs = 0
  35 num_errors = 0
  36 func = False
  37 slots = 0
  38 rlen_sum = 0
  39 for line in os.popen("%s -u %s" % (readelf, sys.argv[1])):
  40     m = start_pattern.match(line)
  41     if m:
  42         check_func(func, slots, rlen_sum)
  43
  44         func  = m.group(1)
  45         start = long(m.group(2), 16)
  46         end   = long(m.group(3), 16)
  47         slots = 3 * (end - start) / 16
  48         rlen_sum = 0L
  49         num_funcs += 1
  50     else:
  51         m = rlen_pattern.match(line)
  52         if m:
  53             rlen_sum += long(m.group(1))
  54 check_func(func, slots, rlen_sum)
  55
  56 if num_errors == 0:
  57     print "No errors detected in %u functions." % num_funcs
  58 else:
  59     if num_errors > 1:
  60         err="errors"
  61     else:
  62         err="error"
  63     print "%u %s detected in %u functions." % (num_errors, err, num_funcs)
  64     sys.exit(1)