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Annotation of embedaddon/dnsmasq/bld/bloat-o-meter, revision 1.1

1.1     ! misho       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))