bloat-o-meter (3493B)
1#!/usr/bin/env python3 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 10import sys, os, re 11from signal import signal, SIGPIPE, SIG_DFL 12 13signal(SIGPIPE, SIG_DFL) 14 15if 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 23re_NUMBER = re.compile(r'\.[0-9]+') 24 25def getsizes(file, format): 26 sym = {} 27 with os.popen("nm --size-sort " + file) as f: 28 for line in f: 29 if line.startswith("\n") or ":" in line: 30 continue 31 size, type, name = line.split() 32 if type in format: 33 # strip generated symbols 34 if name.startswith("__mod_"): continue 35 if name.startswith("__se_sys"): continue 36 if name.startswith("__se_compat_sys"): continue 37 if name.startswith("__addressable_"): continue 38 if name == "linux_banner": continue 39 if name == "vermagic": continue 40 # statics and some other optimizations adds random .NUMBER 41 name = re_NUMBER.sub('', name) 42 sym[name] = sym.get(name, 0) + int(size, 16) 43 return sym 44 45def calc(oldfile, newfile, format): 46 old = getsizes(oldfile, format) 47 new = getsizes(newfile, format) 48 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0 49 delta, common = [], {} 50 otot, ntot = 0, 0 51 52 for a in old: 53 if a in new: 54 common[a] = 1 55 56 for name in old: 57 otot += old[name] 58 if name not in common: 59 remove += 1 60 down += old[name] 61 delta.append((-old[name], name)) 62 63 for name in new: 64 ntot += new[name] 65 if name not in common: 66 add += 1 67 up += new[name] 68 delta.append((new[name], name)) 69 70 for name in common: 71 d = new.get(name, 0) - old.get(name, 0) 72 if d>0: grow, up = grow+1, up+d 73 if d<0: shrink, down = shrink+1, down-d 74 delta.append((d, name)) 75 76 delta.sort() 77 delta.reverse() 78 return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot 79 80def print_result(symboltype, symbolformat, argc): 81 grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \ 82 calc(sys.argv[argc - 1], sys.argv[argc], symbolformat) 83 84 print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \ 85 (add, remove, grow, shrink, up, -down, up-down)) 86 print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta")) 87 for d, n in delta: 88 if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)) 89 90 if otot: 91 percent = (ntot - otot) * 100.0 / otot 92 else: 93 percent = 0 94 print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent)) 95 96if sys.argv[1] == "-c": 97 print_result("Function", "tT", 3) 98 print_result("Data", "dDbB", 3) 99 print_result("RO Data", "rR", 3) 100elif sys.argv[1] == "-d": 101 print_result("Data", "dDbBrR", 3) 102elif sys.argv[1] == "-t": 103 print_result("Function", "tT", 3) 104else: 105 print_result("Function", "tTdDbBrR", 2)