bloat-o-meter: fix quadric behavior in alias resolution
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Bernhard Reutner-Fischer
parent
343dfd7abe
commit
f16d7c4bdf
@ -7,44 +7,69 @@
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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import sys, os, re
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import sys, os#, re
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def usage():
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sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
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sys.stderr.write("usage: %s [-t] file1 file2\n" % sys.argv[0])
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sys.exit(-1)
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if len(sys.argv) < 3:
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usage()
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f1, f2 = (None, None)
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flag_timing, dashes = (False, False)
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for f in sys.argv[1:3]:
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for f in sys.argv[1:]:
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if f.startswith("-"):
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if f == "--": # sym_args
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dashes = True
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break
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if f == "-t": # timings
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flag_timing = True
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else:
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if not os.path.exists(f):
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sys.stderr.write("Error: file '%s' does not exist\n" % f)
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usage()
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if f1 is None:
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f1 = f
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elif f2 is None:
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f2 = f
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if flag_timing:
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import time
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if f1 is None or f2 is None:
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usage()
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sym_args = " ".join(sys.argv[3:])
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sym_args = " ".join(sys.argv[3 + flag_timing + dashes:])
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def getsizes(file):
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sym, alias = {}, {}
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dynsym_filter = re.compile("^\s+\d+:\s+[\dA-Fa-f]+\s+\d+\s+\w+\s+\w+\s+\w+\s+\w+\s+\w+\n$")
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sym, alias, lut = {}, {}, {}
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#dynsym_filter = re.compile("^\d+:\s+[\dA-Fa-f]+\s+\d+\s+\w+\s+\w+\s+\w+\s+\w+\s+\w+$")
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for l in os.popen("readelf -W -s %s %s" % (sym_args, file)).readlines():
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if not dynsym_filter.match(l): continue
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num, value, size, typ, bind, vis, ndx, name = l.strip().split()
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if True:
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l = l.strip()
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if not (len(l) and l[0].isdigit() and len(l.split()) == 8):
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continue
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num, value, size, typ, bind, vis, ndx, name = l.split()
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if ndx == "UND": continue # skip undefined
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if typ in ["SECTION", "FILES"]: continue # skip sections and files
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#else:
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# l = l.strip()
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# match = dynsym_filter.match(l)
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# if not match: continue
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# x, value, size, typ, bind, x, ndx, name = l.split()
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# if ndx == "UND": continue # skip undefined
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# if typ in ["SECTION", "FILES"]: continue # skip sections and files
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if "." in name: name = "static." + name.split(".")[0]
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value = int(value, 16)
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size = int(size)
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if bind != "GLOBAL": # see if it is an alias
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alias[name] = {"addr" : value, "size": size}
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if vis != "DEFAULT" and bind != "GLOBAL": # see if it is an alias
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alias[(value, size)] = {"name" : name}
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else:
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sym[name] = {"addr" : value, "size": size}
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for a_nam, a_dat in alias.iteritems():
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impl = [k for k, v in sym.iteritems() if v.get("addr") == a_dat["addr"]]
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lut[(value, size)] = 0
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for addr, sz in alias.iterkeys():
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# If the non-GLOBAL sym has an implementation elsewhere then
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# it's an alias, disregard it.
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if not impl:
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if not (addr, sz) in lut:
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# If this non-GLOBAL sym does not have an implementation at
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# another address, then treat it as a normal symbol.
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sym[a_nam] = a_dat
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sym[alias[(addr, sz)]["name"]] = {"addr" : addr, "size": sz}
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for l in os.popen("readelf -W -S " + file).readlines():
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x = l.split()
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if len(x)<6: continue
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@ -54,26 +79,34 @@ def getsizes(file):
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sym[x[1]] = {"addr" : int(x[3], 16), "size" : int(x[5], 16)}
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return sym
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old = getsizes(sys.argv[1])
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new = getsizes(sys.argv[2])
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if flag_timing:
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start_t1 = int(time.time() * 1e9)
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old = getsizes(f1)
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if flag_timing:
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end_t1 = int(time.time() * 1e9)
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start_t2 = int(time.time() * 1e9)
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new = getsizes(f2)
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if flag_timing:
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end_t2 = int(time.time() * 1e9)
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start_t3 = int(time.time() * 1e9)
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grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
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delta, common = [], []
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delta, common = [], {}
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for a in old.iterkeys():
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if a in new:
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common.append(a)
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for name in old.iterkeys():
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if name in new:
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common[name] = 1
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for name in old:
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if name not in common:
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remove += 1
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sz = old[name].get("size", 0)
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sz = old[name]["size"]
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down += sz
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delta.append((-sz, name))
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for name in new:
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if name not in common:
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add += 1
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sz = new[name].get("size", 0)
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sz = new[name]["size"]
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up += sz
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delta.append((sz, name))
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@ -87,6 +120,8 @@ for name in common:
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delta.sort()
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delta.reverse()
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if flag_timing:
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end_t3 = int(time.time() * 1e9)
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print "%-48s %7s %7s %+7s" % ("function", "old", "new", "delta")
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for d, n in delta:
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@ -98,3 +133,7 @@ print "-"*78
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total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%sTotal: %s bytes"\
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% (add, remove, grow, shrink, up, -down, up-down)
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print total % (" "*(80-len(total)))
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if flag_timing:
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print("\n%d/%d; %d Parse origin/new; processing nsecs" %
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(end_t1-start_t1, end_t2-start_t2, end_t3-start_t3))
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print("total nsecs: %d" % (end_t3-start_t1))
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