c27849889e193f4d3a8479b5e5db470cccc2493d
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
)