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#!/usr/bin/python

#

# Copyright 2004 Matt Mackall <mpm@selenic.com>

#

# inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen

#

# This software may be used and distributed according to the terms

# of the GNU General Public License, incorporated herein by reference.

import sys, os, re

from signal import signal, SIGPIPE, SIG_DFL

signal(SIGPIPE, SIG_DFL)

if len(sys.argv) < 3:

sys.stderr.write("usage: %s [option] file1 file2\n" % sys.argv[0])

sys.stderr.write("The options are:\n")

sys.stderr.write("-c categorize output based on symbol type\n")

sys.stderr.write("-d Show delta of Data Section\n")

sys.stderr.write("-t Show delta of text Section\n")

sys.exit(-1)

re_NUMBER = re.compile(r'\.[0-9]+')

def getsizes(file, format):

sym = {}

with os.popen("nm --size-sort " + file) as f:

for line in f:

size, type, name = line.split()

if type in format:

# strip generated symbols

if name.startswith("__mod_"): continue

if name.startswith("__se_sys"): continue

if name.startswith("__se_compat_sys"): continue

if name.startswith("__addressable_"): continue

if name == "linux_banner": continue

# statics and some other optimizations adds random .NUMBER

name = re_NUMBER.sub('', name)

sym[name] = sym.get(name, 0) + int(size, 16)

return sym

def calc(oldfile, newfile, format):

old = getsizes(oldfile, format)

new = getsizes(newfile, format)

grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0

delta, common = [], {}

otot, ntot = 0, 0

for a in old:

if a in new:

common[a] = 1

for name in old:

otot += old[name]

if name not in common:

remove += 1

down += old[name]

delta.append((-old[name], name))

for name in new:

ntot += new[name]

if name not in common:

add += 1

up += new[name]

delta.append((new[name], name))

for name in common:

d = new.get(name, 0) - old.get(name, 0)

if d>0: grow, up = grow+1, up+d

if d<0: shrink, down = shrink+1, down-d

delta.append((d, name))

delta.sort()

delta.reverse()

return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot

def print_result(symboltype, symbolformat, argc):

grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \

calc(sys.argv[argc - 1], sys.argv[argc], symbolformat)

print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \

(add, remove, grow, shrink, up, -down, up-down))

print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))

for d, n in delta:

if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))

if otot:

percent = (ntot - otot) * 100.0 / otot

else:

percent = 0

print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))

if sys.argv[1] == "-c":

print_result("Function", "tT", 3)

print_result("Data", "dDbB", 3)

print_result("RO Data", "rR", 3)

elif sys.argv[1] == "-d":

print_result("Data", "dDbBrR", 3)

elif sys.argv[1] == "-t":

print_result("Function", "tT", 3)

else:

print_result("Function", "tTdDbBrR", 2)