diff options
Diffstat (limited to 'scripts/bloat-o-meter')
| -rwxr-xr-x | scripts/bloat-o-meter | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter new file mode 100755 index 0000000000..888ce286a3 --- /dev/null +++ b/scripts/bloat-o-meter @@ -0,0 +1,111 @@ +#!/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", "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") |