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- #!/usr/bin/env bash
- # Copyright (C) 2003-2022 Free Software Foundation, Inc.
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation; either version 3 of the License, or
- # (at your option) any later version.
- #
- # 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, see <http://www.gnu.org/licenses/>.
- #
- # Script to generate a core file of a running program.
- # It starts up gdb, attaches to the given PID and invokes the gcore command.
- #
- # Need to check for -o option, but set default basename to "core".
- prefix=core
- # When the -a option is present, this may hold additional commands
- # to ensure gdb dumps all mappings (OS dependent).
- dump_all_cmds=()
- while getopts :ao: opt; do
- case "$opt" in
- a)
- case "$OSTYPE" in
- linux*)
- dump_all_cmds=("-ex" "set use-coredump-filter off")
- dump_all_cmds+=("-ex" "set dump-excluded-mappings on")
- ;;
- esac
- ;;
- o)
- prefix=$OPTARG
- ;;
- *)
- echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] pid1 [pid2...pidN]"
- exit 2
- ;;
- esac
- done
- shift $((OPTIND-1))
- if [ "$#" -eq "0" ]
- then
- echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] pid1 [pid2...pidN]"
- exit 2
- fi
- # Attempt to fetch the absolute path to the gcore script that was
- # called.
- binary_path=`dirname "$0"`
- if test "x$binary_path" = x. ; then
- # We got "." back as a path. This means the user executed
- # the gcore script locally (i.e. ./gcore) or called the
- # script via a shell interpreter (i.e. sh gcore).
- binary_basename=`basename "$0"`
- # If the gcore script was called like "sh gcore" and the script
- # lives in the current directory, "which" will not give us "gcore".
- # So first we check if the script is in the current directory
- # before using the output of "which".
- if test -f "$binary_basename" ; then
- # We have a local gcore script in ".". This covers the case of
- # doing "./gcore" or "sh gcore".
- binary_path="."
- else
- # The gcore script was not found in ".", which means the script
- # was called from somewhere else in $PATH by "sh gcore".
- # Extract the correct path now.
- binary_path_from_env=`which "$0"`
- binary_path=`dirname "$binary_path_from_env"`
- fi
- fi
- # Check if the GDB binary is in the expected path. If not, just
- # quit with a message.
- if [ ! -f "$binary_path/@GDB_TRANSFORM_NAME@" ]; then
- echo "gcore: GDB binary (${binary_path}/@GDB_TRANSFORM_NAME@) not found"
- exit 1
- fi
- # Initialise return code.
- rc=0
- # Loop through pids
- for pid in "$@"
- do
- # `</dev/null' to avoid touching interactive terminal if it is
- # available but not accessible as GDB would get stopped on SIGTTIN.
- "$binary_path/@GDB_TRANSFORM_NAME@" </dev/null \
- --nx --batch --readnever -iex 'set debuginfod enabled off' \
- -ex "set pagination off" -ex "set height 0" -ex "set width 0" \
- "${dump_all_cmds[@]}" \
- -ex "attach $pid" -ex "gcore $prefix.$pid" -ex detach -ex quit
- if [ -r "$prefix.$pid" ] ; then
- rc=0
- else
- echo "@GCORE_TRANSFORM_NAME@: failed to create $prefix.$pid"
- rc=1
- break
- fi
- done
- exit $rc
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