#!/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, argparse from 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('file1', help='First file to compare') parser.add_argument('file2', 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 == "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.file1, args.file2, 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", "tT") print_result("Data", "dDbB") print_result("RO Data", "rR") elif args.d: print_result("Data", "dDbBrR") elif args.t: print_result("Function", "tT") else: print_result("Function", "tTdDbBrR")