1 /* $NetBSD: t_ptrace_misc_wait.h,v 1.1 2020/05/05 02:06:08 kamil Exp $ */
2
3 /*-
4 * Copyright (c) 2016, 2017, 2018, 2019, 2020 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 static void
user_va0_disable(int operation)30 user_va0_disable(int operation)
31 {
32 pid_t child, wpid;
33 #if defined(TWAIT_HAVE_STATUS)
34 int status;
35 #endif
36 const int sigval = SIGSTOP;
37 int rv;
38
39 struct ptrace_siginfo info;
40
41 if (get_user_va0_disable() == 0)
42 atf_tc_skip("vm.user_va0_disable is set to 0");
43
44 memset(&info, 0, sizeof(info));
45
46 DPRINTF("Before forking process PID=%d\n", getpid());
47 SYSCALL_REQUIRE((child = fork()) != -1);
48 if (child == 0) {
49 DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
50 FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
51
52 DPRINTF("Before raising %s from child\n", strsignal(sigval));
53 FORKEE_ASSERT(raise(sigval) == 0);
54
55 /* NOTREACHED */
56 FORKEE_ASSERTX(0 && "This shall not be reached");
57 __unreachable();
58 }
59 DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
60
61 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
62 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
63
64 validate_status_stopped(status, sigval);
65
66 DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for "
67 "child\n");
68 SYSCALL_REQUIRE(ptrace(PT_GET_SIGINFO, child, &info,
69 sizeof(info)) != -1);
70
71 DPRINTF("Signal traced to lwpid=%d\n", info.psi_lwpid);
72 DPRINTF("Signal properties: si_signo=%#x si_code=%#x "
73 "si_errno=%#x\n",
74 info.psi_siginfo.si_signo, info.psi_siginfo.si_code,
75 info.psi_siginfo.si_errno);
76
77 ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, sigval);
78 ATF_REQUIRE_EQ(info.psi_siginfo.si_code, SI_LWP);
79
80 DPRINTF("Before resuming the child process in PC=0x0 "
81 "and without signal to be sent\n");
82 errno = 0;
83 rv = ptrace(operation, child, (void *)0, 0);
84 ATF_REQUIRE_EQ(errno, EINVAL);
85 ATF_REQUIRE_EQ(rv, -1);
86
87 SYSCALL_REQUIRE(ptrace(PT_KILL, child, NULL, 0) != -1);
88
89 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
90 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
91 validate_status_signaled(status, SIGKILL, 0);
92
93 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
94 TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
95 }
96
97 #define USER_VA0_DISABLE(test, operation) \
98 ATF_TC(test); \
99 ATF_TC_HEAD(test, tc) \
100 { \
101 atf_tc_set_md_var(tc, "descr", \
102 "Verify behavior of " #operation " with PC set to 0x0"); \
103 } \
104 \
105 ATF_TC_BODY(test, tc) \
106 { \
107 \
108 user_va0_disable(operation); \
109 }
110
111 USER_VA0_DISABLE(user_va0_disable_pt_continue, PT_CONTINUE)
112 USER_VA0_DISABLE(user_va0_disable_pt_syscall, PT_SYSCALL)
113 USER_VA0_DISABLE(user_va0_disable_pt_detach, PT_DETACH)
114
115 #define ATF_TP_ADD_TCS_PTRACE_WAIT_MISC() \
116 ATF_TP_ADD_TC(tp, user_va0_disable_pt_continue); \
117 ATF_TP_ADD_TC(tp, user_va0_disable_pt_syscall); \
118 ATF_TP_ADD_TC(tp, user_va0_disable_pt_detach);
119