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comparison scripts/bloat-o-meter @ 41:a43bdc6f53af

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Add bloat-o-meter, make bloatcheck, and scripts/showasm.
author Rob Landley <rob@landley.net>
date Sun, 26 Nov 2006 18:47:14 -0500
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40:d046f8d1401e 41:a43bdc6f53af
1 #!/usr/bin/python
2 #
3 # Copyright 2004 Matt Mackall <mpm@selenic.com>
4 #
5 # inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
6 #
7 # This software may be used and distributed according to the terms
8 # of the GNU General Public License, incorporated herein by reference.
9
10 import sys, os, re
11
12 if len(sys.argv) != 3:
13 sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
14 sys.exit(-1)
15
16 def getsizes(file):
17 sym = {}
18 for l in os.popen("nm --size-sort " + file).readlines():
19 size, type, name = l[:-1].split()
20 if type in "tTdDbB":
21 if "." in name: name = "static." + name.split(".")[0]
22 sym[name] = sym.get(name, 0) + int(size, 16)
23 for l in os.popen("readelf -S " + file).readlines():
24 x = l.split()
25 if len(x)<6 or x[1] != ".rodata": continue
26 sym[".rodata"] = int(x[5], 16)
27 return sym
28
29 old = getsizes(sys.argv[1])
30 new = getsizes(sys.argv[2])
31 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
32 delta, common = [], {}
33
34 for a in old:
35 if a in new:
36 common[a] = 1
37
38 for name in old:
39 if name not in common:
40 remove += 1
41 down += old[name]
42 delta.append((-old[name], name))
43
44 for name in new:
45 if name not in common:
46 add += 1
47 up += new[name]
48 delta.append((new[name], name))
49
50 for name in common:
51 d = new.get(name, 0) - old.get(name, 0)
52 if d>0: grow, up = grow+1, up+d
53 if d<0: shrink, down = shrink+1, down-d
54 delta.append((d, name))
55
56 delta.sort()
57 delta.reverse()
58
59 print "%-48s %7s %7s %+7s" % ("function", "old", "new", "delta")
60 for d, n in delta:
61 if d: print "%-48s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)
62 print "-"*78
63 total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%sTotal: %s bytes"\
64 % (add, remove, grow, shrink, up, -down, up-down)
65 print total % (" "*(80-len(total)))