1 /* $NetBSD: t_backtrace_sandbox.c,v 1.3 2025/01/30 16:13:51 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2025 Kyle Evans <kevans@FreeBSD.org>
5 *
6 * SPDX-License-Identifier: BSD-2-Clause
7 */
8 #include <sys/cdefs.h>
9 __RCSID("$NetBSD: t_backtrace_sandbox.c,v 1.3 2025/01/30 16:13:51 christos Exp $");
10
11 #include <sys/param.h>
12 #include <sys/wait.h>
13 #ifdef __FreeBSD__
14 #include <sys/capsicum.h>
15 #define __arraycount(a) nitems(a)
16 #endif
17
18 #include <execinfo.h>
19 #include <signal.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <stdlib.h>
23 #include <unistd.h>
24
25 #include <atf-c.h>
26
27 #define BT_FUNCTIONS 10
28
29 ATF_TC(backtrace_sandbox);
ATF_TC_HEAD(backtrace_sandbox,tc)30 ATF_TC_HEAD(backtrace_sandbox, tc)
31 {
32 atf_tc_set_md_var(tc, "descr",
33 "Test backtrace_sandbox_init(3) in sandbox");
34 #ifndef __FreeBSD__
35 atf_tc_set_md_var(tc, "require.user", "root");
36 #endif
37 }
38
ATF_TC_BODY(backtrace_sandbox,tc)39 ATF_TC_BODY(backtrace_sandbox, tc)
40 {
41 void *addr[BT_FUNCTIONS];
42 char **syms;
43 size_t frames;
44 pid_t pid;
45 int status;
46
47 frames = backtrace(addr, __arraycount(addr));
48 ATF_REQUIRE(frames > 0);
49
50 syms = backtrace_symbols_fmt(addr, frames, "%n");
51 ATF_REQUIRE(strcmp(syms[0], "atfu_backtrace_sandbox_body") == 0);
52
53 pid = fork();
54 ATF_REQUIRE(pid >= 0);
55
56 if (pid == 0) {
57
58 backtrace_sandbox_init();
59 #ifdef __FreeBSD__
60 cap_enter();
61 #else
62 if (chroot("/tmp") != 0)
63 _exit(EXIT_FAILURE);
64 #endif
65
66 syms = backtrace_symbols_fmt(addr, frames, "%n");
67 if (strcmp(syms[0], "atfu_backtrace_sandbox_body") != 0)
68 _exit(EXIT_FAILURE);
69
70 backtrace_sandbox_fini();
71
72 _exit(EXIT_SUCCESS);
73 }
74
75 (void)wait(&status);
76
77 if (!WIFEXITED(status) || WEXITSTATUS(status) != EXIT_SUCCESS)
78 atf_tc_fail("resolving symbols in chroot failed");
79
80 }
81
ATF_TP_ADD_TCS(tp)82 ATF_TP_ADD_TCS(tp)
83 {
84
85 ATF_TP_ADD_TC(tp, backtrace_sandbox);
86
87 return atf_no_error();
88 }
89