Add a script to faciliate debugging for init (#8988)

diagnostics/dump-init.sh

@@ -0,0 +1,37 @@
+#! /bin/bash
+
+set -ue
+
+if [ $(whoami) != "root" ]; then
+  echo "This script must be run as root in the system distro (via wsl.exe -u root --system)"
+  exit 1
+fi
+
+ts=$(date +%F_%H-%M-%S)
+target="/mnt/c/wsl-init-dump-$ts"
+
+mkdir -p "$target"
+
+tdnf install -y gdb
+
+bash -c "cd $target && gcore -a \$(pgrep init)"
+
+stack_log="$target/stacks.txt"
+fd_log="$target/fd.txt"
+for pid in $(pgrep init); do
+  echo -e "\nProcess: $pid" >> "$stack_log"
+  echo -e "\nProcess: $pid" >> "$fd_log"
+  for tid in $(ls "/proc/$pid/task" || true); do
+    echo "tid: $tid" >> "$stack_log"
+    cat "/proc/$pid/task/$tid/stack" >> "$stack_log" || true
+  done
+
+  ls -la "/proc/$pid/fd" >> "$fd_log" || true
+done
+
+
+ss -lap --vsock > "/$target/sockets.txt"
+dmesg > "/$target/dmesg.txt"
+cat /proc/meminfo > "/$target/meminfo.txt"
+
+echo "Logs and dumps written in $target"