malloc/mtrace.pl

   1 #! @PERL@
   2 eval "exec @PERL@ -S $0 $@"
   3     if 0;
   4 # Copyright (C) 1997-2011, 2012 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, see
  21 # <http://www.gnu.org/licenses/>.
  22
  23 $VERSION = "@VERSION@";
  24 $PACKAGE = "libc";
  25 $progname = $0;
  26
  27 sub usage {
  28     print "Usage: mtrace [OPTION]... [Binary] MtraceData\n";
  29     print "  --help       print this help, then exit\n";
  30     print "  --version    print version number, then exit\n";
  31     print "\n";
  32     print "For bug reporting instructions, please see:\n";
  33     print "<http://www.gnu.org/software/libc/bugs.html>.\n";
  34     exit 0;
  35 }
  36
  37 # We expect two arguments:
  38 #   #1: the complete path to the binary
  39 #   #2: the mtrace data filename
  40 # The usual options are also recognized.
  41
  42 arglist: while (@ARGV) {
  43     if ($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) $VERSION\n";
  47         print "Copyright (C) 2012 Free Software Foundation, Inc.\n";
  48         print "This is free software; see the source for copying conditions.  There is NO\n";
  49         print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
  50         print "Written by Ulrich Drepper <drepper\@gnu.org>\n";
  51
  52         exit 0;
  53     } elsif ($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
  72     if ($binary =~ /^.*[\/].*$/) {
  73         $prog = $binary;
  74     } else {
  75         $prog = "./$binary";
  76     }
  77     if (open (LOCS, "env LD_TRACE_LOADED_OBJECTS=1 $prog |")) {
  78         while (<LOCS>) {
  79             chop;
  80             if (/^.*=> (.*) .(0x[0123456789abcdef]*).$/) {
  81                 $locs{$1} = $2;
  82             }
  83         }
  84         close (LOCS);
  85     }
  86 } else {
  87     die "Wrong number of arguments, run $progname --help for help.";
  88 }
  89
  90 sub location {
  91     my $str = pop(@_);
  92     return $str if ($str eq "");
  93     if ($str =~ /.*[[](0x[^]]*)]:(.)*/) {
  94         my $addr = $1;
  95         my $fct = $2;
  96         return $cache{$addr} if (exists $cache{$addr});
  97         if ($binary ne "" && open (ADDR, "addr2line -e $binary $addr|")) {
  98             my $line = <ADDR>;
  99             chomp $line;
 100             close (ADDR);
 101             if ($line ne '??:0') {
 102                 $cache{$addr} = $line;
 103                 return $cache{$addr};
 104             }
 105         }
 106         $cache{$addr} = $str = "$fct @ $addr";
 107     } elsif ($str =~ /^(.*):.*[[](0x[^]]*)]$/) {
 108         my $prog = $1;
 109         my $addr = $2;
 110         my $searchaddr;
 111         return $cache{$addr} if (exists $cache{$addr});
 112         if ($locs{$prog} ne "") {
 113             $searchaddr = sprintf "%#x", $addr - $locs{$prog};
 114         } else {
 115             $searchaddr = $addr;
 116             $prog = $binary;
 117         }
 118         if ($binary ne "" && open (ADDR, "addr2line -e $prog $searchaddr|")) {
 119             my $line = <ADDR>;
 120             chomp $line;
 121             close (ADDR);
 122             if ($line ne '??:0') {
 123                 $cache{$addr} = $line;
 124                 return $cache{$addr};
 125             }
 126         }
 127         $cache{$addr} = $str = $addr;
 128     } elsif ($str =~ /^.*[[](0x[^]]*)]$/) {
 129         my $addr = $1;
 130         return $cache{$addr} if (exists $cache{$addr});
 131         if ($binary ne "" && open (ADDR, "addr2line -e $binary $addr|")) {
 132             my $line = <ADDR>;
 133             chomp $line;
 134             close (ADDR);
 135             if ($line ne '??:0') {
 136                 $cache{$addr} = $line;
 137                 return $cache{$addr};
 138             }
 139         }
 140         $cache{$addr} = $str = $addr;
 141     }
 142     return $str;
 143 }
 144
 145 $nr=0;
 146 open(DATA, "<$data") || die "Cannot open mtrace data file";
 147 while (<DATA>) {
 148     my @cols = split (' ');
 149     my $n, $where;
 150     if ($cols[0] eq "@") {
 151         # We have address and/or function name.
 152         $where=$cols[1];
 153         $n=2;
 154     } else {
 155         $where="";
 156         $n=0;
 157     }
 158
 159     $allocaddr=$cols[$n + 1];
 160     $howmuch=hex($cols[$n + 2]);
 161
 162     ++$nr;
 163     SWITCH: {
 164         if ($cols[$n] eq "+") {
 165             if (defined $allocated{$allocaddr}) {
 166                 printf ("+ %#0@XXX@x Alloc %d duplicate: %s %s\n",
 167                         hex($allocaddr), $nr, &location($addrwas{$allocaddr}),
 168                         $where);
 169             } else {
 170                 $allocated{$allocaddr}=$howmuch;
 171                 $addrwas{$allocaddr}=$where;
 172             }
 173             last SWITCH;
 174         }
 175         if ($cols[$n] eq "-") {
 176             if (defined $allocated{$allocaddr}) {
 177                 undef $allocated{$allocaddr};
 178                 undef $addrwas{$allocaddr};
 179             } else {
 180                 printf ("- %#0@XXX@x Free %d was never alloc'd %s\n",
 181                         hex($allocaddr), $nr, &location($where));
 182             }
 183             last SWITCH;
 184         }
 185         if ($cols[$n] eq "<") {
 186             if (defined $allocated{$allocaddr}) {
 187                 undef $allocated{$allocaddr};
 188                 undef $addrwas{$allocaddr};
 189             } else {
 190                 printf ("- %#0@XXX@x Realloc %d was never alloc'd %s\n",
 191                         hex($allocaddr), $nr, &location($where));
 192             }
 193             last SWITCH;
 194         }
 195         if ($cols[$n] eq ">") {
 196             if (defined $allocated{$allocaddr}) {
 197                 printf ("+ %#0@XXX@x Realloc %d duplicate: %#010x %s %s\n",
 198                         hex($allocaddr), $nr, $allocated{$allocaddr},
 199                         &location($addrwas{$allocaddr}), &location($where));
 200             } else {
 201                 $allocated{$allocaddr}=$howmuch;
 202                 $addrwas{$allocaddr}=$where;
 203             }
 204             last SWITCH;
 205         }
 206         if ($cols[$n] eq "=") {
 207             # Ignore "= Start".
 208             last SWITCH;
 209         }
 210         if ($cols[$n] eq "!") {
 211             # Ignore failed realloc for now.
 212             last SWITCH;
 213         }
 214     }
 215 }
 216 close (DATA);
 217
 218 # Now print all remaining entries.
 219 @addrs= keys %allocated;
 220 $anything=0;
 221 if ($#addrs >= 0) {
 222     foreach $addr (sort @addrs) {
 223         if (defined $allocated{$addr}) {
 224             if ($anything == 0) {
 225                 print "\nMemory not freed:\n-----------------\n";
 226                 print ' ' x (@XXX@ - 7), "Address     Size     Caller\n";
 227                 $anything=1;
 228             }
 229             printf ("%#0@XXX@x %#8x  at %s\n", hex($addr), $allocated{$addr},
 230                     &location($addrwas{$addr}));
 231         }
 232     }
 233 }
 234 print "No memory leaks.\n" if ($anything == 0);
 235
 236 exit $anything != 0;