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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114#!/usr/bin/env python3## 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, argparsefrom signal import signal, SIGPIPE, SIG_DFL
signal(SIGPIPE, SIG_DFL)
parser = argparse.ArgumentParser(description="Simple script used to compare the symbol sizes of 2 object files")group = parser.add_mutually_exclusive_group()group.add_argument('-c', help='categorize output based on symbol type', action='store_true')group.add_argument('-d', help='Show delta of Data Section', action='store_true')group.add_argument('-t', help='Show delta of text Section', action='store_true')parser.add_argument('-p', dest='prefix', help='Arch prefix for the tool being used. Useful in cross build scenarios')parser.add_argument('file_old', help='First file to compare')parser.add_argument('file_new', help='Second file to compare')
args = parser.parse_args()
re_NUMBER = re.compile(r'\.[0-9]+')
def getsizes(file, format): sym = {} nm = "nm" if args.prefix: nm = "{}nm".format(args.prefix)
with os.popen("{} --size-sort {}".format(nm, file)) as f: for line in f: if line.startswith("\n") or ":" in line: continue 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.startswith("__noinstr_text_start"): continue if name.startswith("_sdata"): continue if name == "linux_banner": continue if name == "vermagic": 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(reverse=True) return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
def print_result(symboltype, symbolformat): grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \ calc(args.file_old, args.file_new, 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 args.c: print_result("Function", "tTwW") print_result("Data", "dDbBvV") print_result("RO Data", "rR")elif args.d: print_result("Data", "dDbBrRvV")elif args.t: print_result("Function", "tTwW")else: print_result("Function", "tTdDbBrRvVwW")