scripts/bloat-o-meter

   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 from signal import signal, SIGPIPE, SIG_DFL
  12
  13 signal(SIGPIPE, SIG_DFL)
  14
  15 if len(sys.argv) < 3:
  16     sys.stderr.write("usage: %s [option] file1 file2\n" % sys.argv[0])
  17     sys.stderr.write("The options are:\n")
  18     sys.stderr.write("-c        categorize output based on symbol type\n")
  19     sys.stderr.write("-d        Show delta of Data Section\n")
  20     sys.stderr.write("-t        Show delta of text Section\n")
  21     sys.exit(-1)
  22
  23 re_NUMBER = re.compile(r'\.[0-9]+')
  24
  25 def getsizes(file, format):
  26     sym = {}
  27     with os.popen("nm --size-sort " + file) as f:
  28         for line in f:
  29             size, type, name = line.split()
  30             if type in format:
  31                 # strip generated symbols
  32                 if name.startswith("__mod_"): continue
  33                 if name.startswith("SyS_"): continue
  34                 if name.startswith("compat_SyS_"): continue
  35                 if name == "linux_banner": continue
  36                 # statics and some other optimizations adds random .NUMBER
  37                 name = re_NUMBER.sub('', name)
  38                 sym[name] = sym.get(name, 0) + int(size, 16)
  39     return sym
  40
  41 def calc(oldfile, newfile, format):
  42     old = getsizes(oldfile, format)
  43     new = getsizes(newfile, format)
  44     grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
  45     delta, common = [], {}
  46     otot, ntot = 0, 0
  47
  48     for a in old:
  49         if a in new:
  50             common[a] = 1
  51
  52     for name in old:
  53         otot += old[name]
  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         ntot += new[name]
  61         if name not in common:
  62             add += 1
  63             up += new[name]
  64             delta.append((new[name], name))
  65
  66     for name in common:
  67         d = new.get(name, 0) - old.get(name, 0)
  68         if d>0: grow, up = grow+1, up+d
  69         if d<0: shrink, down = shrink+1, down-d
  70         delta.append((d, name))
  71
  72     delta.sort()
  73     delta.reverse()
  74     return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
  75
  76 def print_result(symboltype, symbolformat, argc):
  77     grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
  78     calc(sys.argv[argc - 1], sys.argv[argc], symbolformat)
  79
  80     print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
  81           (add, remove, grow, shrink, up, -down, up-down))
  82     print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
  83     for d, n in delta:
  84         if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
  85
  86     if otot:
  87         percent = (ntot - otot) * 100.0 / otot
  88     else:
  89         percent = 0
  90     print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
  91
  92 if sys.argv[1] == "-c":
  93     print_result("Function", "tT", 3)
  94     print_result("Data", "dDbB", 3)
  95     print_result("RO Data", "rR", 3)
  96 elif sys.argv[1] == "-d":
  97     print_result("Data", "dDbBrR", 3)
  98 elif sys.argv[1] == "-t":
  99     print_result("Function", "tT", 3)
 100 else:
 101     print_result("Function", "tTdDbBrR", 2)