3 # Usage: unwcheck.py FILE
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.
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.
17 if len(sys.argv) != 2:
18 print "Usage: %s FILE" % sys.argv[0]
21 readelf = os.getenv("READELF", "readelf")
23 start_pattern = re.compile("<([^>]*)>: \[0x([0-9a-f]+)-0x([0-9a-f]+)\]")
24 rlen_pattern = re.compile(".*rlen=([0-9]+)")
26 def check_func (func, slots, rlen_sum):
30 if not func: func = "[%#x-%#x]" % (start, end)
31 print "ERROR: %s: %lu slots, total region length = %lu" % (func, slots, rlen_sum)
39 for line in os.popen("%s -u %s" % (readelf, sys.argv[1])):
40 m = start_pattern.match(line)
42 check_func(func, slots, rlen_sum)
45 start = long(m.group(2), 16)
46 end = long(m.group(3), 16)
47 slots = 3 * (end - start) / 16
51 m = rlen_pattern.match(line)
53 rlen_sum += long(m.group(1))
54 check_func(func, slots, rlen_sum)
57 print "No errors detected in %u functions." % num_funcs
63 print "%u %s detected in %u functions." % (num_errors, err, num_funcs)