NAME
SYSCALL_DEFINE3 - send signal to one specific thread
SYNOPSIS
SYSCALL_DEFINE3(tgkill, int, tgid, int, pid, int, sig);
ARGUMENTS
tgkill
-- undescribed --
int
-- undescribed --
tgid
the thread group ID of the thread
int
-- undescribed --
pid
the PID of the thread
int
-- undescribed --
sig
signal to be sent
DESCRIPTION
This syscall also checks the tgid and returns -ESRCH even if the PID exists but it´s not belonging to the target process anymore. This method solves the problem of threads exiting and PIDs getting reused.