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