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Asked: 2026-05-10T19:47:37+00:00

i’m working with a multi-threaded program (using pthreads) that currently create a background thread

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i’m working with a multi-threaded program (using pthreads) that currently create a background thread (PTHREAD_DETACHED) and then invokes pthread_exit(0). My problem is that the process is then listed as ‘defunct’ and curiously do not seems to ‘really exists’ in /proc (which defeats my debugging strategies)

I would like the following requirements to be met:

  • the program should run function A in a loop and function B once
  • given the PID of the program /proc/$pid/exe, /proc/$pid/maps and /proc/$pid/fd must be accessible (when the process is defunct, they are all empty or invalid links)
  • it must be possible to suspend/interrupt the program with CTRL+C and CTRL+Z as usual

edit: I hesitate changing the program’s interface for having A in the ‘main’ thread and B in a spawned thread (they are currently in the other way). Would it solve the problem ?

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1 Answer

  1. You can either suspend the execution of the main process waiting for a signal, or don’t detach the thread (using the default PHTREAD_CRATE_JOINABLE) waiting for its termination with a pthread_join().

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