| 1 | #!/usr/bin/env python
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| 2 | #
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| 3 | # Copyright 2004 Matt Mackall <mpm@selenic.com>
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| 4 | #
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| 5 | # Inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
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| 6 | #
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| 7 | # This software may be used and distributed according to the terms
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| 8 | # of the GNU General Public License, incorporated herein by reference.
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| 9 |
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| 10 | import sys, os
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| 11 |
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| 12 | def usage():
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| 13 | sys.stderr.write("usage: %s [-t] file1 file2 [-- <readelf options>]\n"
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| 14 | % sys.argv[0])
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| 15 | sys.stderr.write("\t-t\tShow time spent on parsing/processing\n")
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| 16 | sys.stderr.write("\t--\tPass additional parameters to readelf\n")
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| 17 | sys.exit(1)
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| 18 |
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| 19 | f1, f2 = (None, None)
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| 20 | flag_timing, dashes = (False, False)
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| 21 |
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| 22 | for f in sys.argv[1:]:
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| 23 | if f.startswith("-"):
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| 24 | if f == "--": # sym_args
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| 25 | dashes = True
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| 26 | break
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| 27 | if f == "-t": # timings
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| 28 | flag_timing = True
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| 29 | else:
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| 30 | if not os.path.exists(f):
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| 31 | sys.stderr.write("Error: file '%s' does not exist\n" % f)
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| 32 | usage()
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| 33 | if f1 is None:
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| 34 | f1 = f
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| 35 | elif f2 is None:
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| 36 | f2 = f
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| 37 | else:
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| 38 | usage()
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| 39 | if flag_timing:
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| 40 | import time
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| 41 | if f1 is None or f2 is None:
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| 42 | usage()
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| 43 |
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| 44 | sym_args = " ".join(sys.argv[3 + flag_timing + dashes:])
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| 45 | def getsizes(file):
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| 46 | sym, alias, lut = {}, {}, {}
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| 47 | for l in os.popen("readelf -W -s %s %s" % (sym_args, file)).readlines():
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| 48 | l = l.strip()
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| 49 | if not (len(l) and l[0].isdigit() and len(l.split()) == 8):
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| 50 | continue
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| 51 | num, value, size, typ, bind, vis, ndx, name = l.split()
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| 52 | if ndx == "UND": continue # skip undefined
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| 53 | if typ in ["SECTION", "FILES"]: continue # skip sections and files
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| 54 | if "." in name: name = "static." + name.split(".")[0]
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| 55 | value = int(value, 16)
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| 56 | size = int(size, 16) if size.startswith('0x') else int(size)
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| 57 | if vis != "DEFAULT" and bind != "GLOBAL": # see if it is an alias
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| 58 | alias[(value, size)] = {"name" : name}
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| 59 | else:
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| 60 | sym[name] = {"addr" : value, "size": size}
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| 61 | lut[(value, size)] = 0
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| 62 | for addr, sz in iter(alias.keys()):
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| 63 | # If the non-GLOBAL sym has an implementation elsewhere then
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| 64 | # it's an alias, disregard it.
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| 65 | if not (addr, sz) in lut:
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| 66 | # If this non-GLOBAL sym does not have an implementation at
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| 67 | # another address, then treat it as a normal symbol.
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| 68 | sym[alias[(addr, sz)]["name"]] = {"addr" : addr, "size": sz}
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| 69 | for l in os.popen("readelf -W -S " + file).readlines():
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| 70 | x = l.split()
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| 71 | if len(x)<6: continue
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| 72 | # Should take these into account too!
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| 73 | #if x[1] not in [".text", ".rodata", ".symtab", ".strtab"]: continue
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| 74 | if x[1] not in [".rodata"]: continue
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| 75 | sym[x[1]] = {"addr" : int(x[3], 16), "size" : int(x[5], 16)}
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| 76 | return sym
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| 77 |
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| 78 | if flag_timing:
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| 79 | start_t1 = int(time.time() * 1e9)
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| 80 | old = getsizes(f1)
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| 81 | if flag_timing:
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| 82 | end_t1 = int(time.time() * 1e9)
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| 83 | start_t2 = int(time.time() * 1e9)
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| 84 | new = getsizes(f2)
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| 85 | if flag_timing:
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| 86 | end_t2 = int(time.time() * 1e9)
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| 87 | start_t3 = int(time.time() * 1e9)
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| 88 | grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
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| 89 | delta, common = [], {}
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| 90 |
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| 91 | for name in iter(old.keys()):
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| 92 | if name in new:
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| 93 | common[name] = 1
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| 94 |
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| 95 | for name in old:
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| 96 | if name not in common:
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| 97 | remove += 1
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| 98 | sz = old[name]["size"]
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| 99 | down += sz
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| 100 | delta.append((-sz, name))
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| 101 |
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| 102 | for name in new:
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| 103 | if name not in common:
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| 104 | add += 1
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| 105 | sz = new[name]["size"]
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| 106 | up += sz
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| 107 | delta.append((sz, name))
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| 108 |
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| 109 | for name in common:
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| 110 | d = new[name].get("size", 0) - old[name].get("size", 0)
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| 111 | if d>0: grow, up = grow+1, up+d
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| 112 | elif d<0: shrink, down = shrink+1, down-d
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| 113 | else:
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| 114 | continue
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| 115 | delta.append((d, name))
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| 116 |
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| 117 | delta.sort()
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| 118 | delta.reverse()
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| 119 | if flag_timing:
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| 120 | end_t3 = int(time.time() * 1e9)
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| 121 |
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| 122 | print("%-48s %7s %7s %+7s" % ("function", "old", "new", "delta"))
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| 123 | for d, n in delta:
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| 124 | if d:
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| 125 | old_sz = old.get(n, {}).get("size", "-")
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| 126 | new_sz = new.get(n, {}).get("size", "-")
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| 127 | print("%-48s %7s %7s %+7d" % (n, old_sz, new_sz, d))
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| 128 | print("-"*78)
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| 129 | total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%sTotal: %s bytes"\
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| 130 | % (add, remove, grow, shrink, up, -down, up-down)
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| 131 | print(total % (" "*(80-len(total))))
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| 132 | if flag_timing:
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| 133 | print("\n%d/%d; %d Parse origin/new; processing nsecs" %
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| 134 | (end_t1-start_t1, end_t2-start_t2, end_t3-start_t3))
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| 135 | print("total nsecs: %d" % (end_t3-start_t1))
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