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
20void	handler(int);
21
22__noinline void
23handler(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
45ATF_TC_WITHOUT_HEAD(test_backtrace_sigtramp);
46ATF_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
67ATF_TP_ADD_TCS(tp)
68{
69
70	ATF_TP_ADD_TC(tp, test_backtrace_sigtramp);
71
72	return (atf_no_error());
73}
74