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commit cd93789b89f55355d3eeda6c31ed7bd0ed318acd
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Author: Sergio Lopez <slp@redhat.com>
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Date: Mon Dec 4 09:17:14 2017 +0100
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Implement "-a" command line option for gcore
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With the new "-a" command line option, the user may request gcore to
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actually dump all present memory mappings. The actual effect of this
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argument is OS dependent.
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On GNU/Linux, it will disable use-coredump-filter and enable
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dump-excluded-mappings.
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gdb/ChangeLog:
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2017-11-29 Sergio Lopez <slp@redhat.com>
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* gcore.in: Add "-a" command line option for instructing gdb to
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dump all memory mappings (OS dependent).
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Index: gdb-7.6.1/gdb/gcore.in
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===================================================================
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--- gdb-7.6.1.orig/gdb/gcore.in 2017-12-06 20:57:13.444335680 +0100
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+++ gdb-7.6.1/gdb/gcore.in 2017-12-06 20:57:20.437380926 +0100
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@@ -20,27 +20,39 @@
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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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-if [ "$#" -eq "0" ]
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-then
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- echo "usage: @GCORE_TRANSFORM_NAME@ [-o filename] pid"
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- exit 2
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-fi
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-
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# Need to check for -o option, but set default basename to "core".
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name=core
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-if [ "$1" = "-o" ]
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-then
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- if [ "$#" -lt "3" ]
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- then
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- # Not enough arguments.
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- echo "usage: @GCORE_TRANSFORM_NAME@ [-o filename] pid"
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- exit 2
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- fi
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- name=$2
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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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+
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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 $OSTYPE in
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+ linux*)
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+ dump_all_cmds=("-ex" "set use-coredump-filter off")
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+ dump_all_cmds+=("-ex" "set dump-excluded-mappings on")
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+ ;;
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+ esac
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+ ;;
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+ o)
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+ name=$OPTARG
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+ ;;
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+ *)
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+ echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o filename] pid"
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+ exit 2
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+ ;;
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+ esac
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+done
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+
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+shift $((OPTIND-1))
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- # Shift over to start of pid list
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- shift; shift
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+if [ "$#" -eq "0" ]
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+then
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+ echo "usage: @GCORE_TRANSFORM_NAME@ [-a] [-o filename] pid"
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+ exit 2
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fi
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# Initialise return code.
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@@ -53,6 +65,7 @@
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# available but not accessible as GDB would get stopped on SIGTTIN.
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@GDB_TRANSFORM_NAME@
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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 $name.$pid" -ex detach -ex quit
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if [ -r $name.$pid ] ; then
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