libjava/addr2name.awk

   1 #!/bin/awk -f
   2
   3 # Copyright (C) 2000  Free Software Foundation
   4
   5 #    This file is part of libgcj.
   6
   7 # This software is copyrighted work licensed under the terms of the
   8 # Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 # details.
  10
  11 # This script emulates a little of the functionality of addr2line for
  12 # those systems that don't have it.  The only command line argument is
  13 # an executable name.  The script reads hexadecimal addresses from
  14 # stdin and prints the corresponding symbol names to stdout.  The
  15 # addresses must begin with "0x" and be fully zero filled or this
  16 # won't work.
  17
  18 BEGIN {
  19   object = ARGV[1];
  20   ARGV[1] = "";
  21
  22   while ("nm " object "| sort" | getline) {
  23     if ($2 == "t" || $2 == "T") {
  24       address[i] = "0x" $1; name[i] = $3;
  25       i++;
  26     }
  27   }
  28   syms = i;
  29 }
  30
  31 {
  32   lo = 0;
  33   hi = syms - 1;
  34
  35   while ((hi-1) > lo)
  36     {
  37       try = int ((hi + lo) / 2);
  38       if ($0 < address[try])
  39         hi = try;
  40       else if ($0 >= address[try])
  41         lo = try;
  42     }
  43   print name[lo] "\n"; fflush();
  44 }
  45
  46