blob: 2bfd941ff7c7cdb5a96622875e5d7507125623b3 [file] [log] [blame]
Don Zickus94a47082010-01-26 22:20:41 +00001#!/usr/bin/python
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#
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#
13import os
14import re
15import sys
16
17if len(sys.argv) != 2:
18 print "Usage: %s FILE" % sys.argv[0]
19 sys.exit(2)
20
21readelf = os.getenv("READELF", "readelf")
22
23start_pattern = re.compile("<([^>]*)>: \[0x([0-9a-f]+)-0x([0-9a-f]+)\]")
24rlen_pattern = re.compile(".*rlen=([0-9]+)")
25
26def 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
34num_funcs = 0
35num_errors = 0
36func = False
37slots = 0
38rlen_sum = 0
39for 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))
54check_func(func, slots, rlen_sum)
55
56if num_errors == 0:
57 print "No errors detected in %u functions." % num_funcs
58else:
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)