malloc/mtrace.pl

   1 #! @PERL@
   2 eval "exec @PERL@ -S $0 $*"
   3     if 0;
   4 # Copyright (C) 1997 Free Software Foundation, Inc.
   5 # This file is part of the GNU C Library.
   6 # Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1997.
   7 # Based on the mtrace.awk script.
   8
   9 # The GNU C Library is free software; you can redistribute it and/or
  10 # modify it under the terms of the GNU Library General Public License as
  11 # published by the Free Software Foundation; either version 2 of the
  12 # License, or (at your option) any later version.
  13
  14 # The GNU C Library is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17 # Library General Public License for more details.
  18
  19 # You should have received a copy of the GNU Library General Public
  20 # License along with the GNU C Library; see the file COPYING.LIB.  If not,
  21 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 # Boston, MA 02111-1307, USA.
  23
  24 $VERSION = "@VERSION@";
  25 $PACKAGE = "libc";
  26 $progname = $0;
  27
  28 sub usage {
  29     print "Usage: mtrace [OPTION]... [Binary] MtraceData\n";
  30     print "  --help       print this help, then exit\n";
  31     print "  --version    print version number, then exit\n";
  32     print "\n";
  33     print "Report bugs using the `glibcbug' script to <bugs@gnu.org>.\n";
  34     exit 0;
  35 }
  36
  37 # We expect two arguments:
  38 #   #1: the complete path to the binary
  39 #   #2: the mtrace data filename
  40 # The usual options are also recognized.
  41
  42 arglist: while (@ARGV) {
  43     if ($ARGV[0] eq "--v" || $ARGV[0] eq "--ve" || $ARGV[0] eq "--ver" ||
  44         $ARGV[0] eq "--vers" || $ARGV[0] eq "--versi" ||
  45         $ARGV[0] eq "--versio" || $ARGV[0] eq "--version") {
  46         print "mtrace (GNU $PACKAGE) $VERSION\n";
  47         print "Copyright (C) 1997, 1998 Free Software Foundation, Inc.\n";
  48         print "This is free software; see the source for copying conditions.  There is NO\n";
  49         print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
  50         print "Written by Ulrich Drepper <drepper\@gnu.org>\n";
  51
  52         exit 0;
  53     } elsif ($ARGV[0] eq "--h" || $ARGV[0] eq "--he" || $ARGV[0] eq "--hel" ||
  54              $ARGV[0] eq "--help") {
  55         &usage;
  56     } elsif ($ARGV[0] =~ /^-/) {
  57         print "$progname: unrecognized option `$ARGV[0]'\n";
  58         print "Try `$progname --help' for more information.\n";
  59         exit 1;
  60     } else {
  61         last arglist;
  62     }
  63 }
  64
  65 if ($#ARGV == 0) {
  66     $binary="";
  67     $data=$ARGV[0];
  68 } elsif ($#ARGV == 1) {
  69     $binary=$ARGV[0];
  70     $data=$ARGV[1];
  71 } else {
  72     die "Wrong number of arguments.";
  73 }
  74
  75 sub location {
  76     my $str = pop(@_);
  77     return $str if ($str eq "");
  78     if ($str =~ /[[](0x[^]]*)]:(.)*/) {
  79         my $addr = $1;
  80         my $fct = $2;
  81         return $cache{$addr} if (exists $cache{$addr});
  82         if ($binary ne "" && open (ADDR, "addr2line -e $binary $addr|")) {
  83             my $line = <ADDR>;
  84             chomp $line;
  85             close (ADDR);
  86             if ($line ne '??:0') {
  87                 $cache{$addr} = $line;
  88                 return $cache{$addr};
  89             }
  90         }
  91         $cache{$addr} = $str = "$fct @ $addr";
  92     } elsif ($str =~ /^[[](0x[^]]*)]$/) {
  93         my $addr = $1;
  94         return $cache{$addr} if (exists $cache{$addr});
  95         if ($binary ne "" && open (ADDR, "addr2line -e $binary $addr|")) {
  96             my $line = <ADDR>;
  97             chomp $line;
  98             close (ADDR);
  99             if ($line ne '??:0') {
 100                 $cache{$addr} = $line;
 101                 return $cache{$addr};
 102             }
 103         }
 104         $cache{$addr} = $str = $addr;
 105     }
 106     return $str;
 107 }
 108
 109 $nr=0;
 110 open(DATA, "<$data") || die "Cannot open mtrace data file";
 111 while (<DATA>) {
 112     my @cols = split (' ');
 113     my $n, $where;
 114     if ($cols[0] eq "@") {
 115         # We have address and/or function name.
 116         $where=$cols[1];
 117         $n=2;
 118     } else {
 119         $where="";
 120         $n=0;
 121     }
 122
 123     $allocaddr=$cols[$n + 1];
 124     $howmuch=hex($cols[$n + 2]);
 125
 126     ++$nr;
 127     SWITCH: {
 128         if ($cols[$n] eq "+") {
 129             if (defined $allocated{$allocaddr}) {
 130                 printf ("+ %#0@XXX@x Alloc %d duplicate: %s %s\n",
 131                         hex($allocaddr), $nr, $wherewas{$allocaddr}, $where);
 132             } else {
 133                 $allocated{$allocaddr}=$howmuch;
 134                 $wherewas{$allocaddr}=&location($where);
 135             }
 136             last SWITCH;
 137         }
 138         if ($cols[$n] eq "-") {
 139             if (defined $allocated{$allocaddr}) {
 140                 undef $allocated{$allocaddr};
 141                 undef $wherewas{$allocaddr};
 142             } else {
 143                 printf ("- %#0@XXX@x Free %d was never alloc'd %s\n",
 144                         hex($allocaddr), $nr, &location($where));
 145             }
 146             last SWITCH;
 147         }
 148         if ($cols[$n] eq "<") {
 149             if (defined $allocated{$allocaddr}) {
 150                 undef $allocated{$allocaddr};
 151                 undef $wherewas{$allocaddr};
 152             } else {
 153                 printf ("- %#0@XXX@x Realloc %d was never alloc'd %s\n",
 154                         hex($allocaddr), $nr, &location($where));
 155             }
 156             last SWITCH;
 157         }
 158         if ($cols[$n] eq ">") {
 159             if (defined $allocated{$allocaddr}) {
 160                 printf ("+ %#0@XXX@x Realloc %d duplicate: %#010x %s %s\n",
 161                         hex($allocaddr), $nr, $allocated{$allocaddr},
 162                         $wherewas{$allocaddr}, &location($where));
 163             } else {
 164                 $allocated{$allocaddr}=$howmuch;
 165                 $wherewas{$allocaddr}=&location($where);
 166             }
 167             last SWITCH;
 168         }
 169         if ($cols[$n] eq "=") {
 170             # Ignore "= Start".
 171             last SWITCH;
 172         }
 173         if ($cols[$n] eq "!") {
 174             # Ignore failed realloc for now.
 175             last SWITCH;
 176         }
 177     }
 178 }
 179 close (DATA);
 180
 181 # Now print all remaining entries.
 182 @addrs= keys %allocated;
 183 $anything=0;
 184 if ($#addrs >= 0) {
 185     foreach $addr (sort @addrs) {
 186         if (defined $allocated{$addr}) {
 187             if ($anything == 0) {
 188                 print "\nMemory not freed:\n-----------------\n";
 189                 print ' ' x (@XXX@ - 7), "Address     Size     Caller\n";
 190                 $anything=1;
 191             }
 192             printf ("%#0@XXX@x %#8x  at %s\n", hex($addr), $allocated{$addr},
 193                     $wherewas{$addr});
 194         }
 195     }
 196 }
 197 print "No memory leaks.\n" if ($anything == 0);
 198
 199 exit 0;