scripts/core-collector: Add coredump_filter map to .json

This is done to make clear what data is included with the core dump.

Signed-off-by: Michal Berger <michal.berger@intel.com>
Change-Id: I67f7da7f342354df4688147eaf56283b33ba2863
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15996
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>

scripts/core-collector.sh

@@ -18,7 +18,8 @@ core_meta() {
 		    "PID": $core_pid,
 		    "signal": "$core_sig ($core_sig_name)",
 		    "path": "$exe_path",
-		    "statm": "$statm"
+		    "statm": "$statm",
+		    "filter": "$(coredump_filter)"
 		  }
 		}
 	CORE
@@ -31,6 +32,30 @@ stderr() {
 	set -x
 }
 
+coredump_filter() {
+	local bitmap bit
+	local _filter filter
+
+	bitmap[0]=anon-priv-mappings
+	bitmap[1]=anon-shared-mappings
+	bitmap[2]=file-priv-mappings
+	bitmap[3]=file-shared-mappings
+	bitmap[4]=elf-headers
+	bitmap[5]=priv-hp
+	bitmap[6]=shared-hp
+	bitmap[7]=priv-DAX
+	bitmap[8]=shared-DAX
+
+	_filter=0x$(< "/proc/$core_pid/coredump_filter")
+
+	for bit in "${!bitmap[@]}"; do
+		((_filter & 1 << bit)) || continue
+		filter=${filter:+$filter,}${bitmap[bit]}
+	done
+
+	echo "$filter"
+}
+
 args+=(core_pid)
 args+=(core_sig)
 args+=(core_ts)