diff options
Diffstat (limited to 'utils/analysis/objdiff.py')
-rwxr-xr-x | utils/analysis/objdiff.py | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/utils/analysis/objdiff.py b/utils/analysis/objdiff.py new file mode 100755 index 0000000000..dc51441bfa --- /dev/null +++ b/utils/analysis/objdiff.py | |||
@@ -0,0 +1,54 @@ | |||
1 | #!/usr/bin/python | ||
2 | import sys | ||
3 | from subprocess import Popen, PIPE | ||
4 | |||
5 | if len(sys.argv) != 3: | ||
6 | print """%s usage: | ||
7 | %s obj1 obj2 | ||
8 | Calculate per-symbol and total size differences between obj1 and obj2, | ||
9 | which may be any files that nm can read""" % ((sys.argv[0],)*2) | ||
10 | sys.exit(2) | ||
11 | |||
12 | obj1 = sys.argv[1] | ||
13 | obj2 = sys.argv[2] | ||
14 | |||
15 | def getsyms(obj): | ||
16 | proc = Popen(args=['nm', '-S', '-t', 'd', obj], stdout=PIPE, stderr=PIPE) | ||
17 | out, err = proc.communicate() | ||
18 | if err: | ||
19 | print "nm reported an error:\n" | ||
20 | print err | ||
21 | sys.exit(1) | ||
22 | d = {} | ||
23 | for l in out.splitlines(): | ||
24 | l = l.strip().split() | ||
25 | if len(l) == 4: | ||
26 | d[l[3]] = int(l[1]) | ||
27 | return d | ||
28 | |||
29 | diff = 0 | ||
30 | |||
31 | d1 = getsyms(obj1) | ||
32 | d2 = getsyms(obj2) | ||
33 | l = [(k,v) for k,v in sorted(d1.items()) if k not in d2] | ||
34 | if l: | ||
35 | print "only in %s" % obj1 | ||
36 | print ''.join(" %6d %s\n" % (v,k) for k,v in l) | ||
37 | diff -= sum(v for k,v in l) | ||
38 | |||
39 | l = [(k,v) for k,v in sorted(d2.items()) if k not in d1] | ||
40 | if l: | ||
41 | print "only in %s" % obj2 | ||
42 | print ''.join("%6d %s\n" % (v,k) for k,v in l) | ||
43 | diff += sum(v for k,v in l) | ||
44 | |||
45 | l = [(k,v,d2[k]) for k,v in sorted(d1.items()) if k in d2 and d2[k] != v] | ||
46 | if l: | ||
47 | print "different sizes in %s and %s:" %(obj1, obj2) | ||
48 | print ''.join(" %6d %6d %s\n" % (v1,v2,k) for k,v1,v2 in l) | ||
49 | diff += sum(v2-v1 for k,v1,v2 in l) | ||
50 | |||
51 | if diff: | ||
52 | print "total size difference: %+d" % diff | ||
53 | else: | ||
54 | print "total size difference: 0" | ||