diff options
Diffstat (limited to 'scripts/bloat-o-meter')
| -rwxr-xr-x | scripts/bloat-o-meter | 72 |
1 files changed, 46 insertions, 26 deletions
diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter index eb6fb87..aa12696 100755 --- a/scripts/bloat-o-meter +++ b/scripts/bloat-o-meter @@ -21,51 +21,68 @@ for f in sys.argv[1:3]: sys.stderr.write("Error: file '%s' does not exist\n" % f) usage() -nm_args = " ".join(sys.argv[3:]) +sym_args = " ".join(sys.argv[3:]) def getsizes(file): - sym = {} - for l in os.popen("nm --size-sort %s %s" % (nm_args, file)).readlines(): - l = l.strip() - # Skip empty lines - if not len(l): continue - # Skip archive members - if len(l.split()) == 1 and l.endswith(':'): - continue - size, type, name = l.split() - if type in "tTdDbBrR": - if "." in name: name = "static." + name.split(".")[0] - sym[name] = sym.get(name, 0) + int(size, 16) - for l in os.popen("readelf -S " + file).readlines(): + sym, alias = {}, {} + dynsym_filter = re.compile("^\s+\d+:\s+[\dA-Fa-f]+\s+\d+\s+\w+\s+\w+\s+\w+\s+\w+\s+\w+\n$") + for l in os.popen("readelf -W -s %s %s" % (sym_args, file)).readlines(): + if not dynsym_filter.match(l): continue + num, value, size, typ, bind, vis, ndx, name = l.strip().split() + if ndx == "UND": continue # skip undefined + if typ in ["SECTION", "FILES"]: continue # skip sections and files + if "." in name: name = "static." + name.split(".")[0] + value = int(value, 16) + size = int(size) + if bind != "GLOBAL": # see if it is an alias + alias[name] = {"addr" : value, "size": size} + else: + sym[name] = {"addr" : value, "size": size} + for a_nam, a_dat in alias.iteritems(): + impl = [k for k, v in sym.iteritems() if v.get("addr") == a_dat["addr"]] + # If the non-GLOBAL sym has an implementation elsewhere then + # it's an alias, disregard it. + if not impl: + # If this non-GLOBAL sym does not have an implementation at + # another address, then treat it as a normal symbol. + sym[a_nam] = a_dat + for l in os.popen("readelf -W -S " + file).readlines(): x = l.split() - if len(x)<6 or x[1] != ".rodata": continue - sym[".rodata"] = int(x[5], 16) + if len(x)<6: continue + # Should take these into account too! + #if x[1] not in [".text", ".rodata", ".symtab", ".strtab"]: continue + if x[1] not in [".rodata"]: continue + sym[x[1]] = {"addr" : int(x[3], 16), "size" : int(x[5], 16)} return sym old = getsizes(sys.argv[1]) new = getsizes(sys.argv[2]) grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0 -delta, common = [], {} +delta, common = [], [] -for a in old: +for a in old.iterkeys(): if a in new: - common[a] = 1 + common.append(a) for name in old: if name not in common: remove += 1 - down += old[name] - delta.append((-old[name], name)) + sz = old[name].get("size", 0) + down += sz + delta.append((-sz, name)) for name in new: if name not in common: add += 1 - up += new[name] - delta.append((new[name], name)) + sz = new[name].get("size", 0) + up += sz + delta.append((sz, name)) for name in common: - d = new.get(name, 0) - old.get(name, 0) + d = new[name].get("size", 0) - old[name].get("size", 0) if d>0: grow, up = grow+1, up+d - if d<0: shrink, down = shrink+1, down-d + elif d<0: shrink, down = shrink+1, down-d + else: + continue delta.append((d, name)) delta.sort() @@ -73,7 +90,10 @@ delta.reverse() print "%-48s %7s %7s %+7s" % ("function", "old", "new", "delta") for d, n in delta: - if d: print "%-48s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d) + if d: + old_sz = old.get(n, {}).get("size", "-") + new_sz = new.get(n, {}).get("size", "-") + print "%-48s %7s %7s %+7d" % (n, old_sz, new_sz, d) print "-"*78 total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%sTotal: %s bytes"\ % (add, remove, grow, shrink, up, -down, up-down) |