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
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
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 SKIP_IF(htm_is_synthetic());
60
61 for (i = 0; i < MAX_ATTEMPT; i++) {
62 /*
63 * If anything bad happens in ASM and we fail to set ret
64 * because *handwave* TM this will cause failure
65 */
66 long ret = 0xdead;
67 long rc = 0xbeef;
68
69 alarm(0); /* Disable any pending */
70 signaled = 0;
71 alarm(TIMEOUT);
72 FAIL_IF(tcheck_transactional());
73 rc = tm_signal_self(getpid(), SIGUSR1, &ret);
74 if (ret == 0xdead)
75 /*
76 * This basically means the transaction aborted before we
77 * even got to the suspend... this is crazy but it
78 * happens.
79 * Yes this also means we might never make forward
80 * progress... the alarm() will trip eventually...
81 */
82 continue;
83
84 if (rc || ret) {
85 /* Ret is actually an errno */
86 printf("TEXASR 0x%016lx, TFIAR 0x%016lx\n",
87 __builtin_get_texasr(), __builtin_get_tfiar());
88 fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
89 i, fail, rc, ret);
90 FAIL_IF(ret);
91 }
92 while(!signaled && !fail)
93 asm volatile("": : :"memory");
94 if (!signaled) {
95 fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
96 i, fail, rc, ret);
97 FAIL_IF(fail); /* For the line number */
98 }
99 }
100
101 return 0;
102 }
103
104 int main(void)
105 {
106 return test_harness(test_signal_tm, "signal_tm");
107 }
108
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