| 1 | #!/usr/bin/env bash |
| 2 | |
| 3 | # Copyright (C) 2003-2019 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 | # Need to check for -o option, but set default basename to "core". |
| 24 | prefix=core |
| 25 | |
| 26 | # When the -a option is present, this may hold additional commands |
| 27 | # to ensure gdb dumps all mappings (OS dependent). |
| 28 | dump_all_cmds=() |
| 29 | |
| 30 | while getopts :ao: opt; do |
| 31 | case "$opt" in |
| 32 | a) |
| 33 | case "$OSTYPE" in |
| 34 | linux*) |
| 35 | dump_all_cmds=("-ex" "set use-coredump-filter off") |
| 36 | dump_all_cmds+=("-ex" "set dump-excluded-mappings on") |
| 37 | ;; |
| 38 | esac |
| 39 | ;; |
| 40 | o) |
| 41 | prefix=$OPTARG |
| 42 | ;; |
| 43 | *) |
| 44 | echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] pid1 [pid2...pidN]" |
| 45 | exit 2 |
| 46 | ;; |
| 47 | esac |
| 48 | done |
| 49 | |
| 50 | shift $((OPTIND-1)) |
| 51 | |
| 52 | if [ "$#" -eq "0" ] |
| 53 | then |
| 54 | echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] pid1 [pid2...pidN]" |
| 55 | exit 2 |
| 56 | fi |
| 57 | |
| 58 | # Attempt to fetch the absolute path to the gcore script that was |
| 59 | # called. |
| 60 | binary_path=`dirname "$0"` |
| 61 | |
| 62 | if test "x$binary_path" = x. ; then |
| 63 | # We got "." back as a path. This means the user executed |
| 64 | # the gcore script locally (i.e. ./gcore) or called the |
| 65 | # script via a shell interpreter (i.e. sh gcore). |
| 66 | binary_basename=`basename "$0"` |
| 67 | |
| 68 | # If the gcore script was called like "sh gcore" and the script |
| 69 | # lives in the current directory, "which" will not give us "gcore". |
| 70 | # So first we check if the script is in the current directory |
| 71 | # before using the output of "which". |
| 72 | if test -f "$binary_basename" ; then |
| 73 | # We have a local gcore script in ".". This covers the case of |
| 74 | # doing "./gcore" or "sh gcore". |
| 75 | binary_path="." |
| 76 | else |
| 77 | # The gcore script was not found in ".", which means the script |
| 78 | # was called from somewhere else in $PATH by "sh gcore". |
| 79 | # Extract the correct path now. |
| 80 | binary_path_from_env=`which "$0"` |
| 81 | binary_path=`dirname "$binary_path_from_env"` |
| 82 | fi |
| 83 | fi |
| 84 | |
| 85 | # Check if the GDB binary is in the expected path. If not, just |
| 86 | # quit with a message. |
| 87 | if [ ! -f "$binary_path/@GDB_TRANSFORM_NAME@" ]; then |
| 88 | echo "gcore: GDB binary (${binary_path}/@GDB_TRANSFORM_NAME@) not found" |
| 89 | exit 1 |
| 90 | fi |
| 91 | |
| 92 | # Initialise return code. |
| 93 | rc=0 |
| 94 | |
| 95 | # Loop through pids |
| 96 | for pid in "$@" |
| 97 | do |
| 98 | # `</dev/null' to avoid touching interactive terminal if it is |
| 99 | # available but not accessible as GDB would get stopped on SIGTTIN. |
| 100 | "$binary_path/@GDB_TRANSFORM_NAME@" </dev/null \ |
| 101 | --nx --batch --readnever \ |
| 102 | -ex "set pagination off" -ex "set height 0" -ex "set width 0" \ |
| 103 | "${dump_all_cmds[@]}" \ |
| 104 | -ex "attach $pid" -ex "gcore $prefix.$pid" -ex detach -ex quit |
| 105 | |
| 106 | if [ -r "$prefix.$pid" ] ; then |
| 107 | rc=0 |
| 108 | else |
| 109 | echo "@GCORE_TRANSFORM_NAME@: failed to create $prefix.$pid" |
| 110 | rc=1 |
| 111 | break |
| 112 | fi |
| 113 | |
| 114 | |
| 115 | done |
| 116 | |
| 117 | exit $rc |