|
| 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 [-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 [-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 "$binary_path"/gdb ]; then |
| 76 | + echo "gcore: GDB binary (${binary_path}/gdb) 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 </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: failed to create $name.$pid" |
| 96 | + rc=1 |
| 97 | + break |
| 98 | + fi |
| 99 | + |
| 100 | + |
| 101 | +done |
| 102 | + |
| 103 | +exit $rc |
0 commit comments