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#!/usr/bin/env 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
def usage():
sys.stderr.write("usage: %s [-t] file1 file2 [-- <readelf options>]\n"
% sys.argv[0])
sys.stderr.write("\t-t\tShow time spent on parsing/processing\n")
sys.stderr.write("\t--\tPass additional parameters to readelf\n")
sys.exit(1)
f1, f2 = (None, None)
flag_timing, dashes = (False, False)
for f in sys.argv[1:]:
if f.startswith("-"):
if f == "--": # sym_args
dashes = True
break
if f == "-t": # timings
flag_timing = True
else:
if not os.path.exists(f):
sys.stderr.write("Error: file '%s' does not exist\n" % f)
usage()
if f1 is None:
f1 = f
elif f2 is None:
f2 = f
else:
usage()
if flag_timing:
import time
if f1 is None or f2 is None:
usage()
sym_args = " ".join(sys.argv[3 + flag_timing + dashes:])
def getsizes(file):
sym, alias, lut = {}, {}, {}
for l in os.popen("readelf -W -s %s %s" % (sym_args, file)).readlines():
l = l.strip()
if not (len(l) and l[0].isdigit() and len(l.split()) == 8):
continue
num, value, size, typ, bind, vis, ndx, name = l.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, 16) if size.startswith('0x') else int(size)
if vis != "DEFAULT" and bind != "GLOBAL": # see if it is an alias
alias[(value, size)] = {"name" : name}
else:
sym[name] = {"addr" : value, "size": size}
lut[(value, size)] = 0
for addr, sz in iter(alias.keys()):
# If the non-GLOBAL sym has an implementation elsewhere then
# it's an alias, disregard it.
if not (addr, sz) in lut:
# If this non-GLOBAL sym does not have an implementation at
# another address, then treat it as a normal symbol.
sym[alias[(addr, sz)]["name"]] = {"addr" : addr, "size": sz}
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
if flag_timing:
start_t1 = int(time.time() * 1e9)
old = getsizes(f1)
if flag_timing:
end_t1 = int(time.time() * 1e9)
start_t2 = int(time.time() * 1e9)
new = getsizes(f2)
if flag_timing:
end_t2 = int(time.time() * 1e9)
start_t3 = int(time.time() * 1e9)
grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
delta, common = [], {}
for name in iter(old.keys()):
if name in new:
common[name] = 1
for name in old:
if name not in common:
remove += 1
sz = old[name]["size"]
down += sz
delta.append((-sz, name))
for name in new:
if name not in common:
add += 1
sz = new[name]["size"]
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()
if flag_timing:
end_t3 = int(time.time() * 1e9)
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))))
if flag_timing:
print("\n%d/%d; %d Parse origin/new; processing nsecs" %
(end_t1-start_t1, end_t2-start_t2, end_t3-start_t3))
print("total nsecs: %d" % (end_t3-start_t1))
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