// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2016, Cyril Bur, IBM Corp.
 *
 * Sending one self a signal should always get delivered.
 */

#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>

#include <altivec.h>

#include "utils.h"
#include "../tm/tm.h"

#define MAX_ATTEMPT 500000
#define TIMEOUT 10

extern long tm_signal_self(pid_t pid, int sig, long *ret);

static sig_atomic_t signaled;
static sig_atomic_t fail;

static void signal_handler(int sig)
{
        if (tcheck_active()) {
                fail = 2;
                return;
        }

        if (sig == SIGUSR1)
                signaled = 1;
        else
                fail = 1;
}

static int test_signal_tm()
{
        int i;
        struct sigaction act;

        act.sa_handler = signal_handler;
        act.sa_flags = 0;
        sigemptyset(&act.sa_mask);
        if (sigaction(SIGUSR1, &act, NULL) < 0) {
                perror("sigaction SIGUSR1");
                exit(1);
        }
        if (sigaction(SIGALRM, &act, NULL) < 0) {
                perror("sigaction SIGALRM");
                exit(1);
        }

        SKIP_IF(!have_htm());
        SKIP_IF(htm_is_synthetic());

        for (i = 0; i < MAX_ATTEMPT; i++) {
                /*
                 * If anything bad happens in ASM and we fail to set ret
                 * because *handwave* TM this will cause failure
                 */
                long ret = 0xdead;
                long rc = 0xbeef;

                alarm(0); /* Disable any pending */
                signaled = 0;
                alarm(TIMEOUT);
                FAIL_IF(tcheck_transactional());
                rc = tm_signal_self(getpid(), SIGUSR1, &ret);
                if (ret == 0xdead)
                        /*
                         * This basically means the transaction aborted before we
                         * even got to the suspend... this is crazy but it
                         * happens.
                         * Yes this also means we might never make forward
                         * progress... the alarm() will trip eventually...
                         */
                        continue;

                if (rc || ret) {
                        /* Ret is actually an errno */
                        printf("TEXASR 0x%016lx, TFIAR 0x%016lx\n",
                                        __builtin_get_texasr(), __builtin_get_tfiar());
                        fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
                                        i, fail, rc, ret);
                        FAIL_IF(ret);
                }
                while(!signaled && !fail)
                        asm volatile("": : :"memory");
                if (!signaled) {
                        fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
                                        i, fail, rc, ret);
                        FAIL_IF(fail); /* For the line number */
                }
        }

        return 0;
}

int main(void)
{
        return test_harness(test_signal_tm, "signal_tm");
}