malloc/mtrace.pl

   1 #! @PERL@
   2 eval "exec @PERL@ -S $0 $@"
   3     if 0;
   4 # Copyright (C) 1997-2008, 2009 Free Software Foundation, Inc.
   5 # This file is part of the GNU C Library.
   6 # Contributed by Ulrich Drepper <drepper@gnu.org>, 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 Lesser General Public
  11 # License as published by the Free Software Foundation; either
  12 # version 2.1 of the 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 # Lesser General Public License for more details.
  18
  19 # You should have received a copy of the GNU Lesser General Public
  20 # License along with the GNU C Library; if not, write to the Free
  21 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  22 # 02111-1307 USA.
  23
  24 $VERSION = "@VERSION@";
  25 $PACKAGE = "libc";
  26 $progname = $0;
  27
  28 sub usage {
  29     print "Usage: mtrace [OPTION]... [Binary] MtraceData\n";
  30     print "  --help       print this help, then exit\n";
  31     print "  --version    print version number, then exit\n";
  32     print "\n";
  33     print "For bug reporting instructions, please see:\n";
  34     print "<http://www.gnu.org/software/libc/bugs.html>.\n";
  35     exit 0;
  36 }
  37
  38 # We expect two arguments:
  39 #   #1: the complete path to the binary
  40 #   #2: the mtrace data filename
  41 # The usual options are also recognized.
  42
  43 arglist: while (@ARGV) {
  44     if ($ARGV[0] eq "--v" || $ARGV[0] eq "--ve" || $ARGV[0] eq "--ver" ||
  45         $ARGV[0] eq "--vers" || $ARGV[0] eq "--versi" ||
  46         $ARGV[0] eq "--versio" || $ARGV[0] eq "--version") {
  47         print "mtrace (GNU $PACKAGE) $VERSION\n";
  48         print "Copyright (C) 2009 Free Software Foundation, Inc.\n";
  49         print "This is free software; see the source for copying conditions.  There is NO\n";
  50         print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
  51         print "Written by Ulrich Drepper <drepper\@gnu.org>\n";
  52
  53         exit 0;
  54     } elsif ($ARGV[0] eq "--h" || $ARGV[0] eq "--he" || $ARGV[0] eq "--hel" ||
  55              $ARGV[0] eq "--help") {
  56         &usage;
  57     } elsif ($ARGV[0] =~ /^-/) {
  58         print "$progname: unrecognized option `$ARGV[0]'\n";
  59         print "Try `$progname --help' for more information.\n";
  60         exit 1;
  61     } else {
  62         last arglist;
  63     }
  64 }
  65
  66 if ($#ARGV == 0) {
  67     $binary="";
  68     $data=$ARGV[0];
  69 } elsif ($#ARGV == 1) {
  70     $binary=$ARGV[0];
  71     $data=$ARGV[1];
  72
  73     if ($binary =~ /^.*[\/].*$/) {
  74         $prog = $binary;
  75     } else {
  76         $prog = "./$binary";
  77     }
  78     if (open (LOCS, "env LD_TRACE_LOADED_OBJECTS=1 $prog |")) {
  79         while (<LOCS>) {
  80             chop;
  81             if (/^.*=> (.*) .(0x[0123456789abcdef]*).$/) {
  82                 $locs{$1} = $2;
  83             }
  84         }
  85         close (LOCS);
  86     }
  87 } else {
  88     die "Wrong number of arguments, run $progname --help for help.";
  89 }
  90
  91 sub location {
  92     my $str = pop(@_);
  93     return $str if ($str eq "");
  94     if ($str =~ /.*[[](0x[^]]*)]:(.)*/) {
  95         my $addr = $1;
  96         my $fct = $2;
  97         return $cache{$addr} if (exists $cache{$addr});
  98         if ($binary ne "" && open (ADDR, "addr2line -e $binary $addr|")) {
  99             my $line = <ADDR>;
 100             chomp $line;
 101             close (ADDR);
 102             if ($line ne '??:0') {
 103                 $cache{$addr} = $line;
 104                 return $cache{$addr};
 105             }
 106         }
 107         $cache{$addr} = $str = "$fct @ $addr";
 108     } elsif ($str =~ /^(.*):.*[[](0x[^]]*)]$/) {
 109         my $prog = $1;
 110         my $addr = $2;
 111         my $searchaddr;
 112         return $cache{$addr} if (exists $cache{$addr});
 113         if ($locs{$prog} ne "") {
 114             $searchaddr = sprintf "%#x", $addr - $locs{$prog};
 115         } else {
 116             $searchaddr = $addr;
 117             $prog = $binary;
 118         }
 119         if ($binary ne "" && open (ADDR, "addr2line -e $prog $searchaddr|")) {
 120             my $line = <ADDR>;
 121             chomp $line;
 122             close (ADDR);
 123             if ($line ne '??:0') {
 124                 $cache{$addr} = $line;
 125                 return $cache{$addr};
 126             }
 127         }
 128         $cache{$addr} = $str = $addr;
 129     } elsif ($str =~ /^.*[[](0x[^]]*)]$/) {
 130         my $addr = $1;
 131         return $cache{$addr} if (exists $cache{$addr});
 132         if ($binary ne "" && open (ADDR, "addr2line -e $binary $addr|")) {
 133             my $line = <ADDR>;
 134             chomp $line;
 135             close (ADDR);
 136             if ($line ne '??:0') {
 137                 $cache{$addr} = $line;
 138                 return $cache{$addr};
 139             }
 140         }
 141         $cache{$addr} = $str = $addr;
 142     }
 143     return $str;
 144 }
 145
 146 $nr=0;
 147 open(DATA, "<$data") || die "Cannot open mtrace data file";
 148 while (<DATA>) {
 149     my @cols = split (' ');
 150     my $n, $where;
 151     if ($cols[0] eq "@") {
 152         # We have address and/or function name.
 153         $where=$cols[1];
 154         $n=2;
 155     } else {
 156         $where="";
 157         $n=0;
 158     }
 159
 160     $allocaddr=$cols[$n + 1];
 161     $howmuch=hex($cols[$n + 2]);
 162
 163     ++$nr;
 164     SWITCH: {
 165         if ($cols[$n] eq "+") {
 166             if (defined $allocated{$allocaddr}) {
 167                 printf ("+ %#0@XXX@x Alloc %d duplicate: %s %s\n",
 168                         hex($allocaddr), $nr, &location($addrwas{$allocaddr}),
 169                         $where);
 170             } else {
 171                 $allocated{$allocaddr}=$howmuch;
 172                 $addrwas{$allocaddr}=$where;
 173             }
 174             last SWITCH;
 175         }
 176         if ($cols[$n] eq "-") {
 177             if (defined $allocated{$allocaddr}) {
 178                 undef $allocated{$allocaddr};
 179                 undef $addrwas{$allocaddr};
 180             } else {
 181                 printf ("- %#0@XXX@x Free %d was never alloc'd %s\n",
 182                         hex($allocaddr), $nr, &location($where));
 183             }
 184             last SWITCH;
 185         }
 186         if ($cols[$n] eq "<") {
 187             if (defined $allocated{$allocaddr}) {
 188                 undef $allocated{$allocaddr};
 189                 undef $addrwas{$allocaddr};
 190             } else {
 191                 printf ("- %#0@XXX@x Realloc %d was never alloc'd %s\n",
 192                         hex($allocaddr), $nr, &location($where));
 193             }
 194             last SWITCH;
 195         }
 196         if ($cols[$n] eq ">") {
 197             if (defined $allocated{$allocaddr}) {
 198                 printf ("+ %#0@XXX@x Realloc %d duplicate: %#010x %s %s\n",
 199                         hex($allocaddr), $nr, $allocated{$allocaddr},
 200                         &location($addrwas{$allocaddr}), &location($where));
 201             } else {
 202                 $allocated{$allocaddr}=$howmuch;
 203                 $addrwas{$allocaddr}=$where;
 204             }
 205             last SWITCH;
 206         }
 207         if ($cols[$n] eq "=") {
 208             # Ignore "= Start".
 209             last SWITCH;
 210         }
 211         if ($cols[$n] eq "!") {
 212             # Ignore failed realloc for now.
 213             last SWITCH;
 214         }
 215     }
 216 }
 217 close (DATA);
 218
 219 # Now print all remaining entries.
 220 @addrs= keys %allocated;
 221 $anything=0;
 222 if ($#addrs >= 0) {
 223     foreach $addr (sort @addrs) {
 224         if (defined $allocated{$addr}) {
 225             if ($anything == 0) {
 226                 print "\nMemory not freed:\n-----------------\n";
 227                 print ' ' x (@XXX@ - 7), "Address     Size     Caller\n";
 228                 $anything=1;
 229             }
 230             printf ("%#0@XXX@x %#8x  at %s\n", hex($addr), $allocated{$addr},
 231                     &location($addrwas{$addr}));
 232         }
 233     }
 234 }
 235 print "No memory leaks.\n" if ($anything == 0);
 236
 237 exit $anything != 0;