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https://sourceware.org/git/binutils-gdb.git
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118 lines
3.5 KiB
Bash
118 lines
3.5 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2003-2020 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Script to generate a core file of a running program.
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# It starts up gdb, attaches to the given PID and invokes the gcore command.
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#
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# Need to check for -o option, but set default basename to "core".
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prefix=core
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# When the -a option is present, this may hold additional commands
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# to ensure gdb dumps all mappings (OS dependent).
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dump_all_cmds=()
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while getopts :ao: opt; do
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case "$opt" in
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a)
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case "$OSTYPE" in
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linux*)
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dump_all_cmds=("-ex" "set use-coredump-filter off")
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dump_all_cmds+=("-ex" "set dump-excluded-mappings on")
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;;
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esac
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;;
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o)
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prefix=$OPTARG
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;;
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*)
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echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] pid1 [pid2...pidN]"
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exit 2
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;;
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esac
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done
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shift $((OPTIND-1))
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if [ "$#" -eq "0" ]
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then
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echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] pid1 [pid2...pidN]"
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exit 2
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fi
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# Attempt to fetch the absolute path to the gcore script that was
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# called.
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binary_path=`dirname "$0"`
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if test "x$binary_path" = x. ; then
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# We got "." back as a path. This means the user executed
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# the gcore script locally (i.e. ./gcore) or called the
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# script via a shell interpreter (i.e. sh gcore).
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binary_basename=`basename "$0"`
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# If the gcore script was called like "sh gcore" and the script
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# lives in the current directory, "which" will not give us "gcore".
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# So first we check if the script is in the current directory
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# before using the output of "which".
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if test -f "$binary_basename" ; then
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# We have a local gcore script in ".". This covers the case of
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# doing "./gcore" or "sh gcore".
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binary_path="."
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else
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# The gcore script was not found in ".", which means the script
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# was called from somewhere else in $PATH by "sh gcore".
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# Extract the correct path now.
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binary_path_from_env=`which "$0"`
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binary_path=`dirname "$binary_path_from_env"`
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fi
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fi
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# Check if the GDB binary is in the expected path. If not, just
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# quit with a message.
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if [ ! -f "$binary_path/@GDB_TRANSFORM_NAME@" ]; then
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echo "gcore: GDB binary (${binary_path}/@GDB_TRANSFORM_NAME@) not found"
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exit 1
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fi
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# Initialise return code.
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rc=0
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# Loop through pids
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for pid in "$@"
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do
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# `</dev/null' to avoid touching interactive terminal if it is
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# available but not accessible as GDB would get stopped on SIGTTIN.
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"$binary_path/@GDB_TRANSFORM_NAME@" </dev/null \
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--nx --batch --readnever \
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-ex "set pagination off" -ex "set height 0" -ex "set width 0" \
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"${dump_all_cmds[@]}" \
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-ex "attach $pid" -ex "gcore $prefix.$pid" -ex detach -ex quit
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if [ -r "$prefix.$pid" ] ; then
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rc=0
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else
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echo "@GCORE_TRANSFORM_NAME@: failed to create $prefix.$pid"
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rc=1
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break
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fi
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done
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exit $rc
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