aboutsummaryrefslogtreecommitdiff
path: root/gdb/gcore.in
blob: 0c40e5a54cd4708e2bddd23c4e60b4e128bfb1da (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
#!/usr/bin/env bash

#   Copyright (C) 2003-2024 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=()

data_directory_opt=()

while getopts :ao:d: 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=$OPTARG
            ;;
        d)
            data_directory_opt=("--data-directory" "$OPTARG")
            ;;
        *)
            echo "usage:  @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] [-d data-directory] pid1 [pid2...pidN]"
            exit 2
            ;;
    esac
done

shift $((OPTIND-1))

if [ "$#" -eq "0" ]
then
    echo "usage:  @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] [-d data-directory] 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 \
            "${data_directory_opt[@]}" \
	    --nx --batch --readnever -iex 'set debuginfod enabled off' \
	    -ex "set pagination off" -ex "set height 0" -ex "set width 0" \
	    "${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