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
10 import sys, os, re, argparse
11 from signal import signal, SIGPIPE, SIG_DFL
12
13 signal(SIGPIPE, SIG_DFL)
14
15 parser = argparse.ArgumentParser(description="Simple script used to compare the symbol sizes of 2 object files")
16 group = parser.add_mutually_exclusive_group()
17 group.add_argument('-c', help='categorize output based on symbol type', action='store_true')
18 group.add_argument('-d', help='Show delta of Data Section', action='store_true')
19 group.add_argument('-t', help='Show delta of text Section', action='store_true')
20 parser.add_argument('-p', dest='prefix', help='Arch prefix for the tool being used. Useful in cross build scenarios')
21 parser.add_argument('file1', help='First file to compare')
22 parser.add_argument('file2', help='Second file to compare')
23
24 args = parser.parse_args()
25
26 re_NUMBER = re.compile(r'\.[0-9]+')
27
28 def getsizes(file, format):
29 sym = {}
30 nm = "nm"
31 if args.prefix:
32 nm = "{}nm".format(args.prefix)
33
34 with os.popen("{} --size-sort {}".format(nm, file)) as f:
35 for line in f:
36 if line.startswith("\n") or ":" in line:
37 continue
38 size, type, name = line.split()
39 if type in format:
40 # strip generated symbols
41 if name.startswith("__mod_"): continue
42 if name.startswith("__se_sys"): continue
43 if name.startswith("__se_compat_sys"): continue
44 if name.startswith("__addressable_"): continue
45 if name == "linux_banner": continue
46 if name == "vermagic": continue
47 # statics and some other optimizations adds random .NUMBER
48 name = re_NUMBER.sub('', name)
49 sym[name] = sym.get(name, 0) + int(size, 16)
50 return sym
51
52 def calc(oldfile, newfile, format):
53 old = getsizes(oldfile, format)
54 new = getsizes(newfile, format)
55 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
56 delta, common = [], {}
57 otot, ntot = 0, 0
58
59 for a in old:
60 if a in new:
61 common[a] = 1
62
63 for name in old:
64 otot += old[name]
65 if name not in common:
66 remove += 1
67 down += old[name]
68 delta.append((-old[name], name))
69
70 for name in new:
71 ntot += new[name]
72 if name not in common:
73 add += 1
74 up += new[name]
75 delta.append((new[name], name))
76
77 for name in common:
78 d = new.get(name, 0) - old.get(name, 0)
79 if d>0: grow, up = grow+1, up+d
80 if d<0: shrink, down = shrink+1, down-d
81 delta.append((d, name))
82
83 delta.sort(reverse=True)
84 return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
85
86 def print_result(symboltype, symbolformat):
87 grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
88 calc(args.file1, args.file2, symbolformat)
89
90 print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
91 (add, remove, grow, shrink, up, -down, up-down))
92 print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
93 for d, n in delta:
94 if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
95
96 if otot:
97 percent = (ntot - otot) * 100.0 / otot
98 else:
99 percent = 0
100 print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
101
102 if args.c:
103 print_result("Function", "tTwW")
104 print_result("Data", "dDbBvV")
105 print_result("RO Data", "rR")
106 elif args.d:
107 print_result("Data", "dDbBrRvV")
108 elif args.t:
109 print_result("Function", "tTwW")
110 else:
111 print_result("Function", "tTdDbBrRvVwW")
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