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bloat-o-meter 4.4 KB

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  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. import sys, os
  10. def usage():
  11. sys.stderr.write("usage: %s [-t] file1 file2 [-- <readelf options>]\n"
  12. % sys.argv[0])
  13. sys.stderr.write("\t-t\tShow time spent on parsing/processing\n")
  14. sys.stderr.write("\t--\tPass additional parameters to readelf\n")
  15. sys.exit(1)
  16. f1, f2 = (None, None)
  17. flag_timing, dashes = (False, False)
  18. for f in sys.argv[1:]:
  19. if f.startswith("-"):
  20. if f == "--": # sym_args
  21. dashes = True
  22. break
  23. if f == "-t": # timings
  24. flag_timing = True
  25. else:
  26. if not os.path.exists(f):
  27. sys.stderr.write("Error: file '%s' does not exist\n" % f)
  28. usage()
  29. if f1 is None:
  30. f1 = f
  31. elif f2 is None:
  32. f2 = f
  33. else:
  34. usage()
  35. if flag_timing:
  36. import time
  37. if f1 is None or f2 is None:
  38. usage()
  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. if flag_timing:
  73. start_t1 = int(time.time() * 1e9)
  74. old = getsizes(f1)
  75. if flag_timing:
  76. end_t1 = int(time.time() * 1e9)
  77. start_t2 = int(time.time() * 1e9)
  78. new = getsizes(f2)
  79. if flag_timing:
  80. end_t2 = int(time.time() * 1e9)
  81. start_t3 = int(time.time() * 1e9)
  82. grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
  83. delta, common = [], {}
  84. for name in iter(old.keys()):
  85. if name in new:
  86. common[name] = 1
  87. for name in old:
  88. if name not in common:
  89. remove += 1
  90. sz = old[name]["size"]
  91. down += sz
  92. delta.append((-sz, name))
  93. for name in new:
  94. if name not in common:
  95. add += 1
  96. sz = new[name]["size"]
  97. up += sz
  98. delta.append((sz, name))
  99. for name in common:
  100. d = new[name].get("size", 0) - old[name].get("size", 0)
  101. if d>0: grow, up = grow+1, up+d
  102. elif d<0: shrink, down = shrink+1, down-d
  103. else:
  104. continue
  105. delta.append((d, name))
  106. delta.sort()
  107. delta.reverse()
  108. if flag_timing:
  109. end_t3 = int(time.time() * 1e9)
  110. print("%-48s %7s %7s %+7s" % ("function", "old", "new", "delta"))
  111. for d, n in delta:
  112. if d:
  113. old_sz = old.get(n, {}).get("size", "-")
  114. new_sz = new.get(n, {}).get("size", "-")
  115. print("%-48s %7s %7s %+7d" % (n, old_sz, new_sz, d))
  116. print("-"*78)
  117. total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%sTotal: %s bytes"\
  118. % (add, remove, grow, shrink, up, -down, up-down)
  119. print(total % (" "*(80-len(total))))
  120. if flag_timing:
  121. print("\n%d/%d; %d Parse origin/new; processing nsecs" %
  122. (end_t1-start_t1, end_t2-start_t2, end_t3-start_t3))
  123. print("total nsecs: %d" % (end_t3-start_t1))