1 /*-
2 * Copyright (c) 2023 Dmitry Chagin <dchagin@FreeBSD.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7 #include <sys/param.h>
8 #include <sys/wait.h>
9
10 #include <execinfo.h>
11 #include <signal.h>
12 #include <stdio.h>
13 #include <string.h>
14 #include <unistd.h>
15
16 #include <atf-c.h>
17
18 #define BT_FUNCTIONS 10
19
20 void handler(int);
21
22 __noinline void
handler(int signum __unused)23 handler(int signum __unused)
24 {
25 void *addresses[BT_FUNCTIONS];
26 char **symbols;
27 size_t n, i, match;
28
29 n = backtrace(addresses, nitems(addresses));
30 ATF_REQUIRE(n > 1);
31 symbols = backtrace_symbols(addresses, n);
32 ATF_REQUIRE(symbols != NULL);
33
34 match = -1;
35 for (i = 0; i < n; i++) {
36 printf("%zu: %p, %s\n", i, addresses[i], symbols[i]);
37 if (strstr(symbols[i], "<main+") != NULL)
38 match = i;
39 }
40 ATF_REQUIRE(match > 0);
41 printf("match at %zu, symbols %zu\n", match, n);
42
43 }
44
45 ATF_TC_WITHOUT_HEAD(test_backtrace_sigtramp);
ATF_TC_BODY(test_backtrace_sigtramp,tc)46 ATF_TC_BODY(test_backtrace_sigtramp, tc)
47 {
48 struct sigaction act;
49 pid_t child;
50 int status;
51
52 memset(&act, 0, sizeof(act));
53 act.sa_handler = handler;
54 sigemptyset(&act.sa_mask);
55 sigaction(SIGUSR1, &act, NULL);
56
57 child = fork();
58 ATF_REQUIRE(child != -1);
59
60 if (child == 0) {
61 kill(getppid(), SIGUSR1);
62 _exit(0);
63 } else
64 wait(&status);
65 }
66
ATF_TP_ADD_TCS(tp)67 ATF_TP_ADD_TCS(tp)
68 {
69
70 ATF_TP_ADD_TC(tp, test_backtrace_sigtramp);
71
72 return (atf_no_error());
73 }
74