Function _notify_parent

components/lwp/lwp_pid.c:2085–2116

* @brief Notifies parent process about child process termination * * @param[in,out] lwp The child lightweight process structure * * @note This function sends SIGCHLD signal to parent process with termination details. * It handles both signaled (killed/dumped) and normal exit cases. */

 *       It handles both signaled (killed/dumped) and normal exit cases.
 */
static void _notify_parent(rt_lwp_t lwp)
{
    int si_code;
    int signo_or_exitcode;
    lwp_siginfo_ext_t ext;
    lwp_status_t lwp_status = lwp->lwp_status;
    rt_lwp_t parent = lwp->parent;

    if (WIFSIGNALED(lwp_status))
    {
        si_code = (lwp_status & LWP_COREDUMP_FLAG) ? CLD_DUMPED : CLD_KILLED;
        signo_or_exitcode = WTERMSIG(lwp_status);
    }
    else
    {
        si_code = CLD_EXITED;
        signo_or_exitcode = WEXITSTATUS(lwp->lwp_status);
    }

    lwp_waitpid_kick(parent, lwp);

    ext = rt_malloc(sizeof(struct lwp_siginfo));

    if (ext)
    {
        rt_thread_t cur_thr = rt_thread_self();
        ext->sigchld.status = signo_or_exitcode;
        ext->sigchld.stime = cur_thr->system_time;
        ext->sigchld.utime = cur_thr->user_time;
    }
    lwp_signal_kill(parent, SIGCHLD, si_code, ext);
}

/**
 * @brief Clean up resources when a lightweight process (LWP) terminates