Home/ Questions/Q 6931711
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-27T11:36:47+00:00

I am currently debugging an application which uses pthreads. When I attach GDB it

  • 0

I am currently debugging an application which uses pthreads. When I attach GDB
it continuously prints messages of this form:

[New Thread a_hex_number (LWP a_dec_number)]

I assume that a_hex_number is an address, but whose address it is?
I assume a_dec_number is a unique identifier for created thread, is it?

Are my assumptions right?
Can anyone give me more detail about the numbers and their meaning?
I already read this document but I am still having trouble to get the full picture.
Probably an info about the Linux systags would help me a lot.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I assume that a_hex_number is an address, but whose address it is?

    It’s the address of a thread descriptor (on Linux also the result of pthread_self() call).

    I assume a_dec_number is a unique identifier for created thread, is it?

    No, it’s the thread-id assigned by the kernel to this thread. It’s the same thing as visible in ps output (on Linux, clone(2) threads and processes have very few differences at the kernel level).

    • 0