How to collect a coredump of a running process without killing the process or without restarting an application?

Issue

• How to obtain a core file without restarting an application?
• How an application core can be generated when a process is not crashing?
• I want to collect a coredump of a running process without killing the process

• I use gcore to collect the coredump but buildids and libraries are not available through executing eu-unstrip command

  # gcore <pid>
  [...]
  Saved corefile core.<pid>
  
  # eu-unstrip -n --core=core.<pid> | grep -c "/lib64/"
  0