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dnsmasq 2.71

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