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Annotation of embedaddon/dnsmasq/bld/bloat-o-meter, revision 1.1.1.1

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))