#!/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")