utils/analysis/bloat-o-meter.py

   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 def usage():
  13     sys.stderr.write("Usage: %s file1 file2\n" % sys.argv[0])
  14     sys.exit(-1)
  15
  16 if len(sys.argv) < 3:
  17     usage()
  18
  19 for f in sys.argv[1], sys.argv[2]:
  20     if not os.path.exists(f):
  21         sys.stderr.write("Error: file '%s' does not exist\n" % f)
  22         usage()
  23
  24 nm_args = " ".join([x for x in sys.argv[3:]])
  25 def getsizes(file):
  26     sym = {}
  27     for l in os.popen("nm --size-sort %s %s" % (nm_args, file)).readlines():
  28         l = l.strip()
  29         # Skip empty lines
  30         if not len(l): continue
  31         # Skip archive members
  32         if len(l.split()) == 1 and l.endswith(':'):
  33           continue
  34         size, type, name = l.split()
  35         if type in "tTdDbBrR":
  36             if "." in name: name = "static." + name.split(".")[0]
  37             sym[name] = sym.get(name, 0) + int(size, 16)
  38     for l in os.popen("readelf -S " + file).readlines():
  39         x = l.split()
  40         if len(x)<6 or x[1] != ".rodata": continue
  41         sym[".rodata"] = int(x[5], 16)
  42     return sym
  43
  44 old = getsizes(sys.argv[1])
  45 new = getsizes(sys.argv[2])
  46 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
  47 delta, common = [], {}
  48
  49 for a in old:
  50     if a in new:
  51         common[a] = 1
  52
  53 for name in old:
  54     if name not in common:
  55         remove += 1
  56         down += old[name]
  57         delta.append((-old[name], name))
  58
  59 for name in new:
  60     if name not in common:
  61         add += 1
  62         up += new[name]
  63         delta.append((new[name], name))
  64
  65 for name in common:
  66         d = new.get(name, 0) - old.get(name, 0)
  67         if d>0: grow, up = grow+1, up+d
  68         if d<0: shrink, down = shrink+1, down-d
  69         delta.append((d, name))
  70
  71 delta.sort()
  72 delta.reverse()
  73
  74 print "%-48s %7s %7s %+7s" % ("function", "old", "new", "delta")
  75 for d, n in delta:
  76     if d: print "%-48s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)
  77 print "-"*78
  78 total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%s\nTotal: %s bytes"\
  79     % (add, remove, grow, shrink, up, -down, up-down)
  80 print total % (" "*(80-len(total)))