Commit | Line | Data |
---|---|---|
94a47083 | 1 | #!/usr/bin/python |
1da177e4 LT |
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) |