add monitor_stalled.py script to prevent issues on aarch64 build hosts for riscv64 targets. from time to time ldd stucks on %install stage

Author: Alexander Stefanov

monitor_stalled.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import psutil
+import time
+
+def get_ldd_pid():
+    for proc in psutil.process_iter(['pid', 'name']):
+        if proc.info['name'] == 'ldd':
+            print(proc.info['pid'])
+            return proc.info['pid']
+    return None
+
+def monitor_ldd():
+    ldd_pid = get_ldd_pid()
+    while True:
+        time.sleep(60)
+        new_ldd_pid = get_ldd_pid()
+        if new_ldd_pid == ldd_pid:
+            if ldd_pid is not None:
+                p = psutil.Process(ldd_pid)
+                print("killed: {}".format(ldd_pid))
+                p.kill()
+        else:
+            ldd_pid = new_ldd_pid
+
+if __name__ == '__main__':
+    monitor_ldd()