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#!/usr/bin/python
#
# 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
def usage():
sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
sys.exit(-1)
if len(sys.argv) < 3:
usage()
for f in sys.argv[1:3]:
if not os.path.exists(f):
sys.stderr.write("Error: file '%s' does not exist\n" % f)
usage()
sym_args = " ".join(sys.argv[3:])
def getsizes(file):
sym, alias = {}, {}
dynsym_filter = re.compile("^\s+\d+:\s+[\dA-Fa-f]+\s+\d+\s+\w+\s+\w+\s+\w+\s+\w+\s+\w+\n$")
for l in os.popen("readelf -W -s %s %s" % (sym_args, file)).readlines():
if not dynsym_filter.match(l): continue
num, value, size, typ, bind, vis, ndx, name = l.strip().split()
if ndx == "UND": continue # skip undefined
if typ in ["SECTION", "FILES"]: continue # skip sections and files
if "." in name: name = "static." + name.split(".")[0]
value = int(value, 16)
size = int(size)
if bind != "GLOBAL": # see if it is an alias
alias[name] = {"addr" : value, "size": size}
else:
sym[name] = {"addr" : value, "size": size}
for a_nam, a_dat in alias.iteritems():
impl = [k for k, v in sym.iteritems() if v.get("addr") == a_dat["addr"]]
# If the non-GLOBAL sym has an implementation elsewhere then
# it's an alias, disregard it.
if not impl:
# If this non-GLOBAL sym does not have an implementation at
# another address, then treat it as a normal symbol.
sym[a_nam] = a_dat
for l in os.popen("readelf -W -S " + file).readlines():
x = l.split()
if len(x)<6: continue
# Should take these into account too!
#if x[1] not in [".text", ".rodata", ".symtab", ".strtab"]: continue
if x[1] not in [".rodata"]: continue
sym[x[1]] = {"addr" : int(x[3], 16), "size" : int(x[5], 16)}
return sym
old = getsizes(sys.argv[1])
new = getsizes(sys.argv[2])
grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
delta, common = [], []
for a in old.iterkeys():
if a in new:
common.append(a)
for name in old:
if name not in common:
remove += 1
sz = old[name].get("size", 0)
down += sz
delta.append((-sz, name))
for name in new:
if name not in common:
add += 1
sz = new[name].get("size", 0)
up += sz
delta.append((sz, name))
for name in common:
d = new[name].get("size", 0) - old[name].get("size", 0)
if d>0: grow, up = grow+1, up+d
elif d<0: shrink, down = shrink+1, down-d
else:
continue
delta.append((d, name))
delta.sort()
delta.reverse()
print "%-48s %7s %7s %+7s" % ("function", "old", "new", "delta")
for d, n in delta:
if d:
old_sz = old.get(n, {}).get("size", "-")
new_sz = new.get(n, {}).get("size", "-")
print "%-48s %7s %7s %+7d" % (n, old_sz, new_sz, d)
print "-"*78
total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%sTotal: %s bytes"\
% (add, remove, grow, shrink, up, -down, up-down)
print total % (" "*(80-len(total)))
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