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path: root/utils/analysis/objdiff.py
blob: dc51441bfa59c5b3a9812f078c315a3b7b9ced4a (plain)
 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 ``` ``````#!/usr/bin/python import sys from subprocess import Popen, PIPE if len(sys.argv) != 3: print """%s usage: %s obj1 obj2 Calculate per-symbol and total size differences between obj1 and obj2, which may be any files that nm can read""" % ((sys.argv[0],)*2) sys.exit(2) obj1 = sys.argv[1] obj2 = sys.argv[2] def getsyms(obj): proc = Popen(args=['nm', '-S', '-t', 'd', obj], stdout=PIPE, stderr=PIPE) out, err = proc.communicate() if err: print "nm reported an error:\n" print err sys.exit(1) d = {} for l in out.splitlines(): l = l.strip().split() if len(l) == 4: d[l[3]] = int(l[1]) return d diff = 0 d1 = getsyms(obj1) d2 = getsyms(obj2) l = [(k,v) for k,v in sorted(d1.items()) if k not in d2] if l: print "only in %s" % obj1 print ''.join(" %6d %s\n" % (v,k) for k,v in l) diff -= sum(v for k,v in l) l = [(k,v) for k,v in sorted(d2.items()) if k not in d1] if l: print "only in %s" % obj2 print ''.join("%6d %s\n" % (v,k) for k,v in l) diff += sum(v for k,v in l) l = [(k,v,d2[k]) for k,v in sorted(d1.items()) if k in d2 and d2[k] != v] if l: print "different sizes in %s and %s:" %(obj1, obj2) print ''.join(" %6d %6d %s\n" % (v1,v2,k) for k,v1,v2 in l) diff += sum(v2-v1 for k,v1,v2 in l) if diff: print "total size difference: %+d" % diff else: print "total size difference: 0" ``````