#!/usr/bin/env python # # Copyright 2004 Matt Mackall <mpm@selenic.com> # # Inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen # # This software may be used and distributed according to the terms # of the GNU General Public License, incorporated herein by reference. import sys, os def usage(): sys.stderr.write("usage: %s [-t] file1 file2 [-- <readelf options>]\n" % sys.argv[0]) sys.stderr.write("\t-t\tShow time spent on parsing/processing\n") sys.stderr.write("\t--\tPass additional parameters to readelf\n") sys.exit(1) f1, f2 = (None, None) flag_timing, dashes = (False, False) for f in sys.argv[1:]: if f.startswith("-"): if f == "--": # sym_args dashes = True break if f == "-t": # timings flag_timing = True else: if not os.path.exists(f): sys.stderr.write("Error: file '%s' does not exist\n" % f) usage() if f1 is None: f1 = f elif f2 is None: f2 = f else: usage() if flag_timing: import time if f1 is None or f2 is None: usage() sym_args = " ".join(sys.argv[3 + flag_timing + dashes:]) def getsizes(file): sym, alias, lut = {}, {}, {} for l in os.popen("readelf -W -s %s %s" % (sym_args, file)).readlines(): l = l.strip() if not (len(l) and l[0].isdigit() and len(l.split()) == 8): continue num, value, size, typ, bind, vis, ndx, name = l.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, 16) if size.startswith('0x') else int(size) if vis != "DEFAULT" and bind != "GLOBAL": # see if it is an alias alias[(value, size)] = {"name" : name} else: sym[name] = {"addr" : value, "size": size} lut[(value, size)] = 0 for addr, sz in iter(alias.keys()): # If the non-GLOBAL sym has an implementation elsewhere then # it's an alias, disregard it. if not (addr, sz) in lut: # If this non-GLOBAL sym does not have an implementation at # another address, then treat it as a normal symbol. sym[alias[(addr, sz)]["name"]] = {"addr" : addr, "size": sz} for l in os.popen("readelf -W -S " + file).readlines(): x = l.split() 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 if flag_timing: start_t1 = int(time.time() * 1e9) old = getsizes(f1) if flag_timing: end_t1 = int(time.time() * 1e9) start_t2 = int(time.time() * 1e9) new = getsizes(f2) if flag_timing: end_t2 = int(time.time() * 1e9) start_t3 = int(time.time() * 1e9) grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0 delta, common = [], {} for name in iter(old.keys()): if name in new: common[name] = 1 for name in old: if name not in common: remove += 1 sz = old[name]["size"] down += sz delta.append((-sz, name)) for name in new: if name not in common: add += 1 sz = new[name]["size"] up += sz delta.append((sz, name)) for name in common: d = new[name].get("size", 0) - old[name].get("size", 0) if d>0: grow, up = grow+1, up+d elif d<0: shrink, down = shrink+1, down-d else: continue delta.append((d, name)) delta.sort() delta.reverse() if flag_timing: end_t3 = int(time.time() * 1e9) print("%-48s %7s %7s %+7s" % ("function", "old", "new", "delta")) for d, n in delta: 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) print(total % (" "*(80-len(total)))) if flag_timing: print("\n%d/%d; %d Parse origin/new; processing nsecs" % (end_t1-start_t1, end_t2-start_t2, end_t3-start_t3)) print("total nsecs: %d" % (end_t3-start_t1))