simple script for counting relocs

1 files changed, 78 insertions, 0 deletions

diff --git a/extra/scripts/relinfo.pl b/extra/scripts/relinfo.pl
new file mode 100755
index 000000000..ec4a5df13
--- /dev/null
+++ b/extra/scripts/relinfo.pl
@@ -0,0 +1,78 @@
+#! /usr/bin/perl
+eval "exec /usr/bin/perl -S $0 $*"
+    if 0;
+# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Red Hat, Inc.
+# Written by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+for ($cnt = 0; $cnt <= $#ARGV; ++$cnt) {
+  $relent = 0;
+  $relsz = 0;
+  $relcount = 0;
+  $pltrelsz = 0;
+  $extplt = 0;
+  $users = 0;
+
+  open (READLINK, "readlink -f $ARGV[$cnt] |") || die "cannot open readlink";
+  while (<READLINK>) {
+        chop;
+        $fullpath = $_;
+  }
+  close (READLINK);
+
+  open (READELF, "eu-readelf -d $ARGV[$cnt] |") || die "cannot open $ARGV[$cnt]";
+  while (<READELF>) {
+    chop;
+    if (/.* RELA?ENT *([0-9]*).*/) {
+      $relent = $1 + 0;
+    } elsif (/.* RELA?SZ *([0-9]*).*/) {
+      $relsz = $1 + 0;
+    } elsif (/.* RELA?COUNT *([0-9]*).*/) {
+      $relcount = $1 + 0;
+    } elsif (/.* PLTRELSZ *([0-9]*).*/) {
+      $pltrelsz = $1 + 0;
+    }
+  }
+  close (READELF);
+
+  open (READELF, "eu-readelf -r $ARGV[$cnt] | sed '/'.gnu.conflict'/,/^\$/d' |") || die "cannot open $ARGV[$cnt]";
+  while (<READELF>) {
+    chop;
+    if (/.*JU?MP_SLOT *0+ .*/) {
+      ++$extplt;
+    }
+  }
+  close (READELF);
+
+  if (open (PRELINK, "/usr/sbin/prelink -p 2>/dev/null | fgrep \"$fullpath\" |")) {
+    while (<PRELINK>) {
+      ++$users;
+    }
+    close(PRELINK);
+  } else {
+    $users = -1;
+  }
+
+  printf ("%s: %d relocations, %d relative (%d%%), %d PLT entries, %d for local syms (%d%%)",
+	  $ARGV[$cnt], $relent == 0 ? 0 : $relsz / $relent, $relcount,
+	  $relent == 0 ? 0 : ($relcount * 100) / ($relsz / $relent),
+	  $relent == 0 ? 0 : $pltrelsz / $relent,
+	  $relent == 0 ? 0 : $pltrelsz / $relent - $extplt,
+	  $relent == 0 ? 0 : (($pltrelsz / $relent - $extplt) * 100) / ($pltrelsz / $relent));
+  if ($users >= 0) {
+    printf(", %d users", $users);
+  }
+  printf("\n");
+}