gdb/gcore.in

   1 #!/bin/sh
   2
   3 #   Copyright (C) 2003-2014 Free Software Foundation, Inc.
   4
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 #
  19 # Script to generate a core file of a running program.
  20 # It starts up gdb, attaches to the given PID and invokes the gcore command.
  21 #
  22
  23 if [ "$#" -eq "0" ]
  24 then
  25     echo "usage:  @GCORE_TRANSFORM_NAME@ [-o filename] pid"
  26     exit 2
  27 fi
  28
  29 # Need to check for -o option, but set default basename to "core".
  30 name=core
  31
  32 if [ "$1" = "-o" ]
  33 then
  34     if [ "$#" -lt "3" ]
  35     then
  36         # Not enough arguments.
  37         echo "usage:  @GCORE_TRANSFORM_NAME@ [-o filename] pid"
  38         exit 2
  39     fi
  40     name=$2
  41
  42     # Shift over to start of pid list
  43     shift; shift
  44 fi
  45
  46 # Attempt to fetch the absolute path to the gcore script that was
  47 # called.
  48 binary_path=`dirname "$0"`
  49
  50 if test "x$binary_path" = x. ; then
  51   # We got "." back as a path.  This means the user executed
  52   # the gcore script locally (i.e. ./gcore) or called the
  53   # script via a shell interpreter (i.e. sh gcore).
  54   binary_basename=`basename "$0"`
  55
  56   # If the gcore script was called like "sh gcore" and the script
  57   # lives in the current directory, "which" will not give us "gcore".
  58   # So first we check if the script is in the current directory
  59   # before using the output of "which".
  60   if test -f "$binary_basename" ; then
  61     # We have a local gcore script in ".".  This covers the case of
  62     # doing "./gcore" or "sh gcore".
  63     binary_path="."
  64   else
  65     # The gcore script was not found in ".", which means the script
  66     # was called from somewhere else in $PATH by "sh gcore".
  67     # Extract the correct path now.
  68     binary_path_from_env=`which "$0"`
  69     binary_path=`dirname "$binary_path_from_env"`
  70   fi
  71 fi
  72
  73 # Check if the GDB binary is in the expected path.  If not, just
  74 # quit with a message.
  75 if [ ! -f "$binary_path"/@GDB_TRANSFORM_NAME@ ]; then
  76   echo "gcore: GDB binary (${binary_path}/@GDB_TRANSFORM_NAME@) not found"
  77   exit 1
  78 fi
  79
  80 # Initialise return code.
  81 rc=0
  82
  83 # Loop through pids
  84 for pid in $*
  85 do
  86         # `</dev/null' to avoid touching interactive terminal if it is
  87         # available but not accessible as GDB would get stopped on SIGTTIN.
  88         $binary_path/@GDB_TRANSFORM_NAME@ </dev/null --nx --batch \
  89             -ex "set pagination off" -ex "set height 0" -ex "set width 0" \
  90             -ex "attach $pid" -ex "gcore $name.$pid" -ex detach -ex quit
  91
  92         if [ -r $name.$pid ] ; then
  93             rc=0
  94         else
  95             echo "@GCORE_TRANSFORM_NAME@: failed to create $name.$pid"
  96             rc=1
  97             break
  98         fi
  99
 100
 101 done
 102
 103 exit $rc