Memory dumper to debug memory leak

The entry script is just a wrapper to find the pid
The script with the actual implementation does not load lib/lib.sh
because it has to be run as root and we want to run as little code
as possible as root

Author: ChillerDragon

lib/_dump_memory.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+server_pid="$1"
+
+if [ "$server_pid" = "" ]
+then
+	err "missing argument pid"
+	exit 1
+fi
+if ! ps -p "$server_pid" > /dev/null
+then
+	err "Server process not found. Is the server running?"
+	exit 1
+fi
+
+dump_dir=logs/dump_memory
+rm -rf "$dump_dir"
+mkdir -p "$dump_dir"
+
+# https://serverfault.com/a/408929
+grep rw-p /proc/${server_pid}/maps \
+	| sed -n 's/^\([0-9a-f]*\)-\([0-9a-f]*\) .*$/\1 \2/p' \
+	| while read start stop; do \
+	gdb --batch --pid "${server_pid}" -ex \
+	"dump memory ${dump_dir}/${server_pid}-$start-$stop.dump 0x$start 0x$stop"; \
+done
+
+echo "[*] dumped server memory to $dump_dir .. OK"

lib/dump_memory.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+if [ ! -f lib/lib.sh ]
+then
+    echo "Error: lib/lib.sh not found!"
+    echo "make sure you are in the root of the server repo"
+    exit 1
+fi
+
+source lib/lib.sh
+
+server_pid="$(pgrep -f "$SERVER_UUID")"
+
+if [ "$server_pid" = "" ]
+then
+	err "Server process not found. Is the server running?"
+	exit 1
+fi
+
+log "run the following command as root:"
+echo ""
+echo "  ./lib/_dump_memory.sh $server_pid"
+echo ""