debug/xtrace.sh

   1 #! @BASH@
   2 # Copyright (C) 1999, 2001-2008, 2009, 2010 Free Software Foundation, Inc.
   3 # This file is part of the GNU C Library.
   4 # Contributed by Ulrich Drepper <drepper@gnu.org>, 1999.
   5
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2.1 of the License, or (at your option) any later version.
  10
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Lesser General Public License for more details.
  15
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with the GNU C Library; if not, write to the Free
  18 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 # 02111-1307 USA.
  20
  21 pcprofileso='@SLIBDIR@/libpcprofile.so'
  22 pcprofiledump='@BINDIR@/pcprofiledump'
  23 TEXTDOMAIN=libc
  24
  25 # Print usage message.
  26 do_usage() {
  27   printf $"Usage: xtrace [OPTION]... PROGRAM [PROGRAMOPTION]...\n"
  28   exit 0
  29 }
  30
  31 # Refer to --help option.
  32 help_info() {
  33   printf >&2 $"Try \`xtrace --help' for more information.\n"
  34   exit 1
  35 }
  36
  37 # Message for missing argument.
  38 do_missing_arg() {
  39   printf >&2 $"xtrace: option \`$1' requires an argument.\n"
  40   help_info
  41 }
  42
  43 # Print help message
  44 do_help() {
  45   printf $"Usage: xtrace [OPTION]... PROGRAM [PROGRAMOPTION]...\n"
  46   printf $"Trace execution of program by printing currently executed function.
  47
  48      --data=FILE          Don't run the program, just print the data from FILE.
  49
  50    -?,--help              Print this help and exit
  51       --usage             Give a short usage message
  52    -V,--version           Print version information and exit
  53
  54 Mandatory arguments to long options are also mandatory for any corresponding
  55 short options.
  56
  57 "
  58   echo $"For bug reporting instructions, please see:
  59 <http://www.gnu.org/software/libc/bugs.html>.
  60 "
  61   exit 0
  62 }
  63
  64 do_version() {
  65   echo 'xtrace (GNU libc) @VERSION@'
  66   printf $"Copyright (C) %s Free Software Foundation, Inc.
  67 This is free software; see the source for copying conditions.  There is NO
  68 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  69 " "2010"
  70   printf $"Written by %s.
  71 " "Ulrich Drepper"
  72   exit 0
  73 }
  74
  75 # Print out function name, file, and line number in a nicely formatted way.
  76 format_line() {
  77   fct=$1
  78   file=${2%%:*}
  79   line=${2##*:}
  80   width=$(expr $COLUMNS - 30)
  81   filelen=$(expr length $file)
  82   if test "$filelen" -gt "$width"; then
  83     rwidth=$(expr $width - 3)
  84     file="...$(expr substr $file $(expr 1 + $filelen - $rwidth) $rwidth)"
  85   fi
  86   printf '%-20s  %-*s  %6s\n' $fct $width $file $line
  87 }
  88
  89
  90 # If the variable COLUMNS is not set do this now.
  91 COLUMNS=${COLUMNS:-80}
  92
  93 # If `TERMINAL_PROG' is not set, set it to `xterm'.
  94 TERMINAL_PROG=${TERMINAL_PROG:-xterm}
  95
  96 # The data file to process, if any.
  97 data=
  98
  99 # Process arguments.  But stop as soon as the program name is found.
 100 while test $# -gt 0; do
 101   case "$1" in
 102   --d | --da | --dat | --data)
 103     if test $# -eq 1; then
 104       do_missing_arg $1
 105     fi
 106     shift
 107     data="$1"
 108     ;;
 109   --d=* | --da=* | --dat=* | --data=*)
 110     data=${1##*=}
 111     ;;
 112   -\? | --h | --he | --hel | --help)
 113     do_help
 114     ;;
 115   -V | --v | --ve | --ver | --vers | --versi | --versio | --version)
 116     do_version
 117     ;;
 118   --u | --us | --usa | --usag | --usage)
 119     do_usage
 120     ;;
 121   --)
 122     # Stop processing arguments.
 123     shift
 124     break
 125     ;;
 126   --*)
 127     printf >&2 $"xtrace: unrecognized option \`$1'\n"
 128     help_info
 129     ;;
 130   *)
 131     # Unknown option.  This means the rest is the program name and parameters.
 132     break
 133     ;;
 134   esac
 135   shift
 136 done
 137
 138 # See whether any arguments are left.
 139 if test $# -eq 0; then
 140   printf >&2 $"No program name given\n"
 141   help_info
 142 fi
 143
 144 # Determine the program name and check whether it exists.
 145 program=$1
 146 shift
 147 if test ! -f "$program"; then
 148   printf >&2 $"executable \`$program' not found\n"
 149   help_info
 150 fi
 151 if test ! -x "$program"; then
 152   printf >&2 $"\`$program' is no executable\n"
 153   help_info
 154 fi
 155
 156 # We have two modes.  If a data file is given simply print the included data.
 157 printf "%-20s  %-*s  %6s\n" Function $(expr $COLUMNS - 30) File Line
 158 for i in $(seq 1 $COLUMNS); do printf -; done; printf '\n'
 159 if test -n "$data"; then
 160   $pcprofiledump "$data" |
 161   sed 's/this = \([^,]*\).*/\1/' |
 162   addr2line -fC -e "$program" |
 163   while read fct; do
 164     read file
 165     if test "$fct" != '??' -a "$file" != '??:0'; then
 166       format_line "$fct" "$file"
 167     fi
 168   done
 169 else
 170   fifo=$(mktemp -ut xtrace.XXXXXX) || exit
 171   trap 'rm -f "$fifo"; exit 1' HUP INT QUIT TERM PIPE
 172   mkfifo -m 0600 $fifo || exit 1
 173
 174   # Now start the program and let it write to the FIFO.
 175   $TERMINAL_PROG -T "xtrace - $program $*" -e /bin/sh -c "LD_PRELOAD=$pcprofileso PCPROFILE_OUTPUT=$fifo $program $*; read < $fifo" &
 176   termpid=$!
 177   $pcprofiledump -u "$fifo" |
 178   while read line; do
 179      echo "$line" |
 180      sed 's/this = \([^,]*\).*/\1/' |
 181      addr2line -fC -e "$program"
 182   done |
 183   while read fct; do
 184     read file
 185     if test "$fct" != '??' -a "$file" != '??:0'; then
 186       format_line "$fct" "$file"
 187     fi
 188   done
 189   read -p "Press return here to close $TERMINAL_PROG($program)."
 190   echo > "$fifo"
 191   rm "$fifo"
 192 fi
 193
 194 exit 0
 195 # Local Variables:
 196 #  mode:ksh
 197 # End: