1 /*
2 * Test the lowest and the highest real-time signals.
3 *
4 * SPDX-License-Identifier: GPL-2.0-or-later
5 */
6 #include <assert.h>
7 #include <signal.h>
8 #include <stdbool.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <unistd.h>
13
14 /* For hexagon and microblaze. */
15 #ifndef __SIGRTMIN
16 #define __SIGRTMIN 32
17 #endif
18
19 extern char **environ;
20
21 static bool seen_sigrtmin, seen_sigrtmax;
22
handle_signal(int sig)23 static void handle_signal(int sig)
24 {
25 if (sig == SIGRTMIN) {
26 seen_sigrtmin = true;
27 } else if (sig == SIGRTMAX) {
28 seen_sigrtmax = true;
29 } else {
30 _exit(1);
31 }
32 }
33
main(int argc,char ** argv)34 int main(int argc, char **argv)
35 {
36 char *qemu = getenv("QEMU");
37 struct sigaction act;
38
39 assert(qemu);
40
41 if (!getenv("QEMU_RTSIG_MAP")) {
42 char **new_argv = malloc((argc + 2) + sizeof(char *));
43 int tsig1, hsig1, count1, tsig2, hsig2, count2;
44 char rt_sigmap[64];
45
46 /* Re-exec with a mapping that includes SIGRTMIN and SIGRTMAX. */
47 new_argv[0] = qemu;
48 memcpy(&new_argv[1], argv, (argc + 1) * sizeof(char *));
49 tsig1 = __SIGRTMIN;
50 /* The host must have a few signals starting from this one. */
51 hsig1 = 36;
52 count1 = SIGRTMIN - __SIGRTMIN + 1;
53 tsig2 = SIGRTMAX;
54 hsig2 = hsig1 + count1;
55 count2 = 1;
56 snprintf(rt_sigmap, sizeof(rt_sigmap), "%d %d %d,%d %d %d",
57 tsig1, hsig1, count1, tsig2, hsig2, count2);
58 setenv("QEMU_RTSIG_MAP", rt_sigmap, 0);
59 assert(execve(new_argv[0], new_argv, environ) == 0);
60 return EXIT_FAILURE;
61 }
62
63 memset(&act, 0, sizeof(act));
64 act.sa_handler = handle_signal;
65 assert(sigaction(SIGRTMIN, &act, NULL) == 0);
66 assert(sigaction(SIGRTMAX, &act, NULL) == 0);
67
68 assert(kill(getpid(), SIGRTMIN) == 0);
69 assert(seen_sigrtmin);
70 assert(kill(getpid(), SIGRTMAX) == 0);
71 assert(seen_sigrtmax);
72
73 return EXIT_SUCCESS;
74 }
75