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https://sourceware.org/git/binutils-gdb.git
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b91f93a02c
Add debuginfod support to core_target::build_file_mappings and locate_exec_from_corefile_build_id to enable the downloading of missing executables and shared libraries referenced in core files. Also add debuginfod support to solib_map_sections so that previously downloaded shared libraries can be retrieved from the local debuginfod cache. When core file shared libraries are found locally, verify that their build-ids match the corresponding build-ids found in the core file. If there is a mismatch, attempt to query debuginfod for the correct build and print a warning if unsuccessful: warning: Build-id of /lib64/libc.so.6 does not match core file. Also disable debuginfod when gcore invokes gdb. Debuginfo is not needed for core file generation so debuginfod queries will slow down gcore unnecessarily.
118 lines
3.5 KiB
Bash
118 lines
3.5 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2003-2022 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 -iex 'set debuginfod enabled off' \
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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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