112 lines
2.3 KiB
C
Executable file
112 lines
2.3 KiB
C
Executable file
/*
|
|
* Copyright 2016, Cyril Bur, IBM Corp.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* Sending one self a signal should always get delivered.
|
|
*/
|
|
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
|
|
#include <altivec.h>
|
|
|
|
#include "utils.h"
|
|
|
|
#define MAX_ATTEMPT 500000
|
|
#define TIMEOUT 5
|
|
|
|
extern long signal_self(pid_t pid, int sig);
|
|
|
|
static sig_atomic_t signaled;
|
|
static sig_atomic_t fail;
|
|
|
|
static void signal_handler(int sig)
|
|
{
|
|
if (sig == SIGUSR1)
|
|
signaled = 1;
|
|
else
|
|
fail = 1;
|
|
}
|
|
|
|
static int test_signal()
|
|
{
|
|
int i;
|
|
struct sigaction act;
|
|
pid_t ppid = getpid();
|
|
pid_t pid;
|
|
|
|
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);
|
|
}
|
|
|
|
/* Don't do this for MAX_ATTEMPT, its simply too long */
|
|
for(i = 0; i < 1000; i++) {
|
|
pid = fork();
|
|
if (pid == -1) {
|
|
perror("fork");
|
|
exit(1);
|
|
}
|
|
if (pid == 0) {
|
|
signal_self(ppid, SIGUSR1);
|
|
exit(1);
|
|
} else {
|
|
alarm(0); /* Disable any pending */
|
|
alarm(2);
|
|
while (!signaled && !fail)
|
|
asm volatile("": : :"memory");
|
|
if (!signaled) {
|
|
fprintf(stderr, "Didn't get signal from child\n");
|
|
FAIL_IF(1); /* For the line number */
|
|
}
|
|
/* Otherwise we'll loop too fast and fork() will eventually fail */
|
|
waitpid(pid, NULL, 0);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < MAX_ATTEMPT; i++) {
|
|
long rc;
|
|
|
|
alarm(0); /* Disable any pending */
|
|
signaled = 0;
|
|
alarm(TIMEOUT);
|
|
rc = signal_self(ppid, SIGUSR1);
|
|
if (rc) {
|
|
fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
|
|
i, fail, rc);
|
|
FAIL_IF(1); /* For the line number */
|
|
}
|
|
while (!signaled && !fail)
|
|
asm volatile("": : :"memory");
|
|
if (!signaled) {
|
|
fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
|
|
i, fail, rc);
|
|
FAIL_IF(1); /* For the line number */
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
test_harness_set_timeout(300);
|
|
return test_harness(test_signal, "signal");
|
|
}
|