112 lines
3.8 KiB
Plaintext
112 lines
3.8 KiB
Plaintext
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#!/usr/bin/env python3
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#
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# Copyright 2004 Matt Mackall <mpm@selenic.com>
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#
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# inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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import sys, os, re, argparse
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from signal import signal, SIGPIPE, SIG_DFL
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signal(SIGPIPE, SIG_DFL)
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parser = argparse.ArgumentParser(description="Simple script used to compare the symbol sizes of 2 object files")
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group = parser.add_mutually_exclusive_group()
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group.add_argument('-c', help='categorize output based on symbol type', action='store_true')
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group.add_argument('-d', help='Show delta of Data Section', action='store_true')
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group.add_argument('-t', help='Show delta of text Section', action='store_true')
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parser.add_argument('-p', dest='prefix', help='Arch prefix for the tool being used. Useful in cross build scenarios')
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parser.add_argument('file1', help='First file to compare')
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parser.add_argument('file2', help='Second file to compare')
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args = parser.parse_args()
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re_NUMBER = re.compile(r'\.[0-9]+')
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def getsizes(file, format):
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sym = {}
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nm = "nm"
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if args.prefix:
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nm = "{}nm".format(args.prefix)
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with os.popen("{} --size-sort {}".format(nm, file)) as f:
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for line in f:
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if line.startswith("\n") or ":" in line:
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continue
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size, type, name = line.split()
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if type in format:
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# strip generated symbols
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if name.startswith("__mod_"): continue
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if name.startswith("__se_sys"): continue
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if name.startswith("__se_compat_sys"): continue
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if name.startswith("__addressable_"): continue
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if name == "linux_banner": continue
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if name == "vermagic": continue
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# statics and some other optimizations adds random .NUMBER
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name = re_NUMBER.sub('', name)
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sym[name] = sym.get(name, 0) + int(size, 16)
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return sym
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def calc(oldfile, newfile, format):
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old = getsizes(oldfile, format)
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new = getsizes(newfile, format)
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grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
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delta, common = [], {}
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otot, ntot = 0, 0
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for a in old:
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if a in new:
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common[a] = 1
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for name in old:
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otot += old[name]
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if name not in common:
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remove += 1
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down += old[name]
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delta.append((-old[name], name))
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for name in new:
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ntot += new[name]
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if name not in common:
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add += 1
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up += new[name]
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delta.append((new[name], name))
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for name in common:
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d = new.get(name, 0) - old.get(name, 0)
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if d>0: grow, up = grow+1, up+d
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if d<0: shrink, down = shrink+1, down-d
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delta.append((d, name))
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delta.sort(reverse=True)
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return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
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def print_result(symboltype, symbolformat):
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grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
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calc(args.file1, args.file2, symbolformat)
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print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
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(add, remove, grow, shrink, up, -down, up-down))
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print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
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for d, n in delta:
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if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
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if otot:
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percent = (ntot - otot) * 100.0 / otot
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else:
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percent = 0
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print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
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if args.c:
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print_result("Function", "tT")
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print_result("Data", "dDbB")
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print_result("RO Data", "rR")
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elif args.d:
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print_result("Data", "dDbBrR")
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elif args.t:
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print_result("Function", "tT")
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else:
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print_result("Function", "tTdDbBrR")
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