1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright 2016, Cyril Bur, IBM Corp.
4 *
5 * Sending one self a signal should always get delivered.
6 */
7
8 #include <errno.h>
9 #include <stdlib.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <unistd.h>
14
15 #include <altivec.h>
16
17 #include "utils.h"
18 #include "../tm/tm.h"
19
20 #define MAX_ATTEMPT 500000
21 #define TIMEOUT 10
22
23 extern long tm_signal_self(pid_t pid, int sig, long *ret);
24
25 static sig_atomic_t signaled;
26 static sig_atomic_t fail;
27
signal_handler(int sig)28 static void signal_handler(int sig)
29 {
30 if (tcheck_active()) {
31 fail = 2;
32 return;
33 }
34
35 if (sig == SIGUSR1)
36 signaled = 1;
37 else
38 fail = 1;
39 }
40
test_signal_tm()41 static int test_signal_tm()
42 {
43 int i;
44 struct sigaction act;
45
46 act.sa_handler = signal_handler;
47 act.sa_flags = 0;
48 sigemptyset(&act.sa_mask);
49 if (sigaction(SIGUSR1, &act, NULL) < 0) {
50 perror("sigaction SIGUSR1");
51 exit(1);
52 }
53 if (sigaction(SIGALRM, &act, NULL) < 0) {
54 perror("sigaction SIGALRM");
55 exit(1);
56 }
57
58 SKIP_IF(!have_htm());
59
60 for (i = 0; i < MAX_ATTEMPT; i++) {
61 /*
62 * If anything bad happens in ASM and we fail to set ret
63 * because *handwave* TM this will cause failure
64 */
65 long ret = 0xdead;
66 long rc = 0xbeef;
67
68 alarm(0); /* Disable any pending */
69 signaled = 0;
70 alarm(TIMEOUT);
71 FAIL_IF(tcheck_transactional());
72 rc = tm_signal_self(getpid(), SIGUSR1, &ret);
73 if (ret == 0xdead)
74 /*
75 * This basically means the transaction aborted before we
76 * even got to the suspend... this is crazy but it
77 * happens.
78 * Yes this also means we might never make forward
79 * progress... the alarm() will trip eventually...
80 */
81 continue;
82
83 if (rc || ret) {
84 /* Ret is actually an errno */
85 printf("TEXASR 0x%016lx, TFIAR 0x%016lx\n",
86 __builtin_get_texasr(), __builtin_get_tfiar());
87 fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
88 i, fail, rc, ret);
89 FAIL_IF(ret);
90 }
91 while(!signaled && !fail)
92 asm volatile("": : :"memory");
93 if (!signaled) {
94 fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
95 i, fail, rc, ret);
96 FAIL_IF(fail); /* For the line number */
97 }
98 }
99
100 return 0;
101 }
102
main(void)103 int main(void)
104 {
105 return test_harness(test_signal_tm, "signal_tm");
106 }
107