t_ptrace_syscall_wait.h revision 1.4
1 /* $NetBSD: t_ptrace_syscall_wait.h,v 1.4 2025/05/02 02:24:32 riastradh 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 int test_syscall_caught; 30 31 static void 32 syscall_sighand(int arg) 33 { 34 35 DPRINTF("Caught a signal %d in process %d\n", arg, getpid()); 36 37 FORKEE_ASSERT_EQ(arg, SIGINFO); 38 39 ++test_syscall_caught; 40 41 FORKEE_ASSERT_EQ(test_syscall_caught, 1); 42 } 43 44 static void 45 syscall_body(const char *op) 46 { 47 const int exitval = 5; 48 const int sigval = SIGSTOP; 49 pid_t child, wpid; 50 #if defined(TWAIT_HAVE_STATUS) 51 int status; 52 #endif 53 struct ptrace_siginfo info; 54 55 memset(&info, 0, sizeof(info)); 56 57 if (strstr(op, "signal") != NULL) { 58 #if defined(TWAIT_HAVE_STATUS) 59 atf_tc_expect_fail("XXX: behavior under investigation"); 60 #else 61 atf_tc_skip("PR lib/55087"); 62 #endif 63 } 64 65 DPRINTF("Before forking process PID=%d\n", getpid()); 66 SYSCALL_REQUIRE((child = fork()) != -1); 67 if (child == 0) { 68 DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid()); 69 FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1); 70 71 signal(SIGINFO, syscall_sighand); 72 73 DPRINTF("Before raising %s from child\n", strsignal(sigval)); 74 FORKEE_ASSERT(raise(sigval) == 0); 75 76 syscall(SYS_getpid); 77 78 if (strstr(op, "signal") != NULL) { 79 FORKEE_ASSERT_EQ(test_syscall_caught, 1); 80 } 81 82 DPRINTF("Before exiting of the child process\n"); 83 _exit(exitval); 84 } 85 DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child); 86 87 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 88 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); 89 90 validate_status_stopped(status, sigval); 91 92 DPRINTF("Before resuming the child process where it left off and " 93 "without signal to be sent\n"); 94 SYSCALL_REQUIRE(ptrace(PT_SYSCALL, child, (void *)1, 0) != -1); 95 96 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 97 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); 98 99 validate_status_stopped(status, SIGTRAP); 100 101 DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for child\n"); 102 SYSCALL_REQUIRE(ptrace(PT_GET_SIGINFO, child, &info, sizeof(info)) != -1); 103 104 DPRINTF("Before checking siginfo_t and lwpid\n"); 105 ATF_REQUIRE(info.psi_lwpid > 0); 106 ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, SIGTRAP); 107 ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_SCE); 108 109 if (strstr(op, "killed") != NULL) { 110 SYSCALL_REQUIRE(ptrace(PT_KILL, child, NULL, 0) != -1); 111 112 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 113 TWAIT_REQUIRE_SUCCESS( 114 wpid = TWAIT_GENERIC(child, &status, 0), child); 115 116 validate_status_signaled(status, SIGKILL, 0); 117 } else { 118 if (strstr(op, "signal") != NULL) { 119 DPRINTF("Before resuming the child %d and sending a " 120 "signal SIGINFO\n", child); 121 SYSCALL_REQUIRE( 122 ptrace(PT_CONTINUE, child, (void *)1, SIGINFO) 123 != -1); 124 } else if (strstr(op, "detach") != NULL) { 125 DPRINTF("Before detaching the child %d\n", child); 126 SYSCALL_REQUIRE( 127 ptrace(PT_DETACH, child, (void *)1, 0) != -1); 128 } else { 129 DPRINTF("Before resuming the child process where it " 130 "left off and without signal to be sent\n"); 131 SYSCALL_REQUIRE( 132 ptrace(PT_SYSCALL, child, (void *)1, 0) != -1); 133 134 DPRINTF("Before calling %s() for the child\n", 135 TWAIT_FNAME); 136 TWAIT_REQUIRE_SUCCESS( 137 wpid = TWAIT_GENERIC(child, &status, 0), child); 138 139 validate_status_stopped(status, SIGTRAP); 140 141 DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO " 142 "for child\n"); 143 SYSCALL_REQUIRE( 144 ptrace(PT_GET_SIGINFO, child, &info, sizeof(info)) 145 != -1); 146 147 DPRINTF("Before checking siginfo_t and lwpid\n"); 148 ATF_REQUIRE(info.psi_lwpid > 0); 149 ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, SIGTRAP); 150 ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_SCX); 151 152 DPRINTF("Before resuming the child process where it " 153 "left off and without signal to be sent\n"); 154 SYSCALL_REQUIRE( 155 ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); 156 } 157 158 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 159 TWAIT_REQUIRE_SUCCESS( 160 wpid = TWAIT_GENERIC(child, &status, 0), child); 161 162 validate_status_exited(status, exitval); 163 } 164 165 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 166 TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0)); 167 } 168 169 #define SYSCALL_TEST(name,op) \ 170 ATF_TC(name); \ 171 ATF_TC_HEAD(name, tc) \ 172 { \ 173 atf_tc_set_md_var(tc, "timeout", "15"); \ 174 atf_tc_set_md_var(tc, "descr", \ 175 "Verify that getpid(2) can be traced with PT_SYSCALL %s", \ 176 #op ); \ 177 } \ 178 \ 179 ATF_TC_BODY(name, tc) \ 180 { \ 181 \ 182 syscall_body(op); \ 183 } 184 185 SYSCALL_TEST(syscall, "") 186 SYSCALL_TEST(syscall_killed_on_sce, "and killed") 187 SYSCALL_TEST(syscall_signal_on_sce, "and signaled") 188 SYSCALL_TEST(syscall_detach_on_sce, "and detached") 189 190 /// ---------------------------------------------------------------------------- 191 192 ATF_TC(syscallemu1); 193 ATF_TC_HEAD(syscallemu1, tc) 194 { 195 atf_tc_set_md_var(tc, "descr", 196 "Verify that exit(2) can be intercepted with PT_SYSCALLEMU"); 197 } 198 199 ATF_TC_BODY(syscallemu1, tc) 200 { 201 const int exitval = 5; 202 const int sigval = SIGSTOP; 203 pid_t child, wpid; 204 #if defined(TWAIT_HAVE_STATUS) 205 int status; 206 #endif 207 208 DPRINTF("Before forking process PID=%d\n", getpid()); 209 SYSCALL_REQUIRE((child = fork()) != -1); 210 if (child == 0) { 211 DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid()); 212 FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1); 213 214 DPRINTF("Before raising %s from child\n", strsignal(sigval)); 215 FORKEE_ASSERT(raise(sigval) == 0); 216 217 syscall(SYS_exit, 100); 218 219 DPRINTF("Before exiting of the child process\n"); 220 _exit(exitval); 221 } 222 DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child); 223 224 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 225 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); 226 227 validate_status_stopped(status, sigval); 228 229 DPRINTF("Before resuming the child process where it left off and " 230 "without signal to be sent\n"); 231 SYSCALL_REQUIRE(ptrace(PT_SYSCALL, child, (void *)1, 0) != -1); 232 233 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 234 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); 235 236 validate_status_stopped(status, SIGTRAP); 237 238 DPRINTF("Set SYSCALLEMU for intercepted syscall\n"); 239 SYSCALL_REQUIRE(ptrace(PT_SYSCALLEMU, child, (void *)1, 0) != -1); 240 241 DPRINTF("Before resuming the child process where it left off and " 242 "without signal to be sent\n"); 243 SYSCALL_REQUIRE(ptrace(PT_SYSCALL, child, (void *)1, 0) != -1); 244 245 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 246 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); 247 248 validate_status_stopped(status, SIGTRAP); 249 250 DPRINTF("Before resuming the child process where it left off and " 251 "without signal to be sent\n"); 252 SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); 253 254 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 255 TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); 256 257 validate_status_exited(status, exitval); 258 259 DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); 260 TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0)); 261 } 262 263 #define ATF_TP_ADD_TCS_PTRACE_WAIT_SYSCALL() \ 264 ATF_TP_ADD_TC(tp, syscall); \ 265 ATF_TP_ADD_TC(tp, syscall_killed_on_sce); \ 266 ATF_TP_ADD_TC(tp, syscall_signal_on_sce); \ 267 ATF_TP_ADD_TC(tp, syscall_detach_on_sce); \ 268 ATF_TP_ADD_TC(tp, syscallemu1); 269
Indexes created Fri Oct 03 02:09:57 GMT 2025