#include <signal.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/ucontext.h>
#include <unistd.h>
#include <errno.h>

int test_signal;

void test_handler(int signal, siginfo_t *info, void *context)
{
}

void install_handlers(void)
{
    struct sigaction sa;
    sa.sa_flags = SA_SIGINFO;
    sigemptyset(&sa.sa_mask);
    sa.sa_sigaction = test_handler;
    sigaction(test_signal, &sa, 0);
}

int main(void)
{
    sigset_t sigset;
    test_signal = SIGRTMIN;
    install_handlers();
    sigemptyset(&sigset);
    sigaddset(&sigset, SIGRTMIN);
    sigprocmask(SIG_BLOCK, &sigset, 0);
    {
        int r;
        int count = 0;
        do {
            r = pthread_kill(pthread_self(), test_signal);
            if (r == EAGAIN) {
                printf("pthread_kill returned EAGAIN, errno=%d, count=%d\n",
                       errno, count);
                sleep(2);
                exit(27);
            }
            if (!r)
                count++;
        } while (!r);
    }
}