t_ptrace_sigchld.c revision 1.2.2.2
1 1.2.2.2 martin /* $NetBSD: t_ptrace_sigchld.c,v 1.2.2.2 2020/04/08 14:09:09 martin Exp $ */ 2 1.2.2.2 martin 3 1.2.2.2 martin /*- 4 1.2.2.2 martin * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 1.2.2.2 martin * All rights reserved. 6 1.2.2.2 martin * 7 1.2.2.2 martin * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 martin * modification, are permitted provided that the following conditions 9 1.2.2.2 martin * are met: 10 1.2.2.2 martin * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 martin * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 martin * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 martin * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 martin * documentation and/or other materials provided with the distribution. 15 1.2.2.2 martin * 16 1.2.2.2 martin * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.2.2.2 martin * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.2.2.2 martin * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.2.2.2 martin * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.2.2.2 martin * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.2.2.2 martin * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.2.2.2 martin * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.2.2.2 martin * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.2.2.2 martin * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.2.2.2 martin * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.2.2.2 martin * POSSIBILITY OF SUCH DAMAGE. 27 1.2.2.2 martin */ 28 1.2.2.2 martin 29 1.2.2.2 martin #include <sys/cdefs.h> 30 1.2.2.2 martin __RCSID("$NetBSD: t_ptrace_sigchld.c,v 1.2.2.2 2020/04/08 14:09:09 martin Exp $"); 31 1.2.2.2 martin 32 1.2.2.2 martin #include <sys/param.h> 33 1.2.2.2 martin #include <sys/types.h> 34 1.2.2.2 martin #include <sys/exec_elf.h> 35 1.2.2.2 martin #include <sys/mman.h> 36 1.2.2.2 martin #include <sys/ptrace.h> 37 1.2.2.2 martin #include <sys/resource.h> 38 1.2.2.2 martin #include <sys/stat.h> 39 1.2.2.2 martin #include <sys/syscall.h> 40 1.2.2.2 martin #include <sys/sysctl.h> 41 1.2.2.2 martin #include <sys/uio.h> 42 1.2.2.2 martin #include <sys/wait.h> 43 1.2.2.2 martin #include <machine/reg.h> 44 1.2.2.2 martin #include <assert.h> 45 1.2.2.2 martin #include <elf.h> 46 1.2.2.2 martin #include <err.h> 47 1.2.2.2 martin #include <errno.h> 48 1.2.2.2 martin #include <fcntl.h> 49 1.2.2.2 martin #include <lwp.h> 50 1.2.2.2 martin #include <pthread.h> 51 1.2.2.2 martin #include <sched.h> 52 1.2.2.2 martin #include <signal.h> 53 1.2.2.2 martin #include <spawn.h> 54 1.2.2.2 martin #include <stdint.h> 55 1.2.2.2 martin #include <stdio.h> 56 1.2.2.2 martin #include <stdlib.h> 57 1.2.2.2 martin #include <strings.h> 58 1.2.2.2 martin #include <time.h> 59 1.2.2.2 martin #include <unistd.h> 60 1.2.2.2 martin 61 1.2.2.2 martin #include <atf-c.h> 62 1.2.2.2 martin 63 1.2.2.2 martin #include "h_macros.h" 64 1.2.2.2 martin #include "msg.h" 65 1.2.2.2 martin 66 1.2.2.2 martin #include "t_ptrace_wait.h" 67 1.2.2.2 martin 68 1.2.2.2 martin #define SYSCALL_REQUIRE(expr) ATF_REQUIRE_MSG(expr, "%s: %s", # expr, \ 69 1.2.2.2 martin strerror(errno)) 70 1.2.2.2 martin #define SYSCALL_REQUIRE_ERRNO(res, exp) ATF_REQUIRE_MSG(res == exp, \ 71 1.2.2.2 martin "%d(%s) != %d", res, strerror(res), exp) 72 1.2.2.2 martin 73 1.2.2.2 martin static int debug = 0; 74 1.2.2.2 martin 75 1.2.2.2 martin #define DPRINTF(a, ...) do \ 76 1.2.2.2 martin if (debug) \ 77 1.2.2.2 martin printf("%s() %d.%d %s:%d " a, \ 78 1.2.2.2 martin __func__, getpid(), _lwp_self(), __FILE__, __LINE__, ##__VA_ARGS__); \ 79 1.2.2.2 martin while (/*CONSTCOND*/0) 80 1.2.2.2 martin 81 1.2.2.2 martin /// ---------------------------------------------------------------------------- 82 1.2.2.2 martin 83 1.2.2.2 martin static int expected_signo; 84 1.2.2.2 martin static int expected_code; 85 1.2.2.2 martin static int expected_status; 86 1.2.2.2 martin static pid_t expected_pid; 87 1.2.2.2 martin 88 1.2.2.2 martin static void 89 1.2.2.2 martin sigchld_action(int sig, siginfo_t *info, void *ctx) 90 1.2.2.2 martin { 91 1.2.2.2 martin 92 1.2.2.2 martin FORKEE_ASSERT_EQ(info->si_signo, expected_signo); 93 1.2.2.2 martin FORKEE_ASSERT_EQ(info->si_code, expected_code); 94 1.2.2.2 martin FORKEE_ASSERT_EQ(info->si_uid, getuid()); 95 1.2.2.2 martin FORKEE_ASSERT_EQ(info->si_pid, expected_pid); 96 1.2.2.2 martin 97 1.2.2.2 martin if (WIFEXITED(info->si_status)) 98 1.2.2.2 martin ATF_REQUIRE_EQ(WEXITSTATUS(info->si_status), expected_status); 99 1.2.2.2 martin else if (WIFSTOPPED(info->si_status)) 100 1.2.2.2 martin ATF_REQUIRE_EQ(WSTOPSIG(info->si_status), expected_status); 101 1.2.2.2 martin else if (WIFSIGNALED(info->si_status)) 102 1.2.2.2 martin ATF_REQUIRE_EQ(WTERMSIG(info->si_status), expected_status); 103 1.2.2.2 martin /* 104 1.2.2.2 martin else if (WIFCONTINUED(info->si_status)) 105 1.2.2.2 martin ; 106 1.2.2.2 martin */ 107 1.2.2.2 martin } 108 1.2.2.2 martin 109 1.2.2.2 martin static void 110 1.2.2.2 martin traceme_raise(int sigval) 111 1.2.2.2 martin { 112 1.2.2.2 martin const int exitval = 5; 113 1.2.2.2 martin struct sigaction sa; 114 1.2.2.2 martin pid_t child; 115 1.2.2.2 martin struct msg_fds parent_child; 116 1.2.2.2 martin uint8_t msg = 0xde; /* dummy message for IPC based on pipe(2) */ 117 1.2.2.2 martin 118 1.2.2.2 martin struct ptrace_siginfo info; 119 1.2.2.2 martin memset(&info, 0, sizeof(info)); 120 1.2.2.2 martin 121 1.2.2.2 martin memset(&sa, 0, sizeof(sa)); 122 1.2.2.2 martin sa.sa_sigaction = sigchld_action; 123 1.2.2.2 martin sa.sa_flags = SA_SIGINFO | SA_NOCLDWAIT; 124 1.2.2.2 martin sigemptyset(&sa.sa_mask); 125 1.2.2.2 martin 126 1.2.2.2 martin atf_tc_fail("XXX: zombie is not collected before tracer's death"); 127 1.2.2.2 martin 128 1.2.2.2 martin SYSCALL_REQUIRE(sigaction(SIGCHLD, &sa, NULL) == 0); 129 1.2.2.2 martin 130 1.2.2.2 martin SYSCALL_REQUIRE(msg_open(&parent_child) == 0); 131 1.2.2.2 martin 132 1.2.2.2 martin DPRINTF("Before forking process PID=%d\n", getpid()); 133 1.2.2.2 martin SYSCALL_REQUIRE((child = fork()) != -1); 134 1.2.2.2 martin if (child == 0) { 135 1.2.2.2 martin DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid()); 136 1.2.2.2 martin FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1); 137 1.2.2.2 martin 138 1.2.2.2 martin CHILD_FROM_PARENT("raise1 child", parent_child, msg); 139 1.2.2.2 martin 140 1.2.2.2 martin raise(sigval); 141 1.2.2.2 martin 142 1.2.2.2 martin CHILD_TO_PARENT("raise2 child", parent_child, msg); 143 1.2.2.2 martin 144 1.2.2.2 martin switch (sigval) { 145 1.2.2.2 martin case SIGKILL: 146 1.2.2.2 martin /* NOTREACHED */ 147 1.2.2.2 martin FORKEE_ASSERTX(0 && "This shall not be reached"); 148 1.2.2.2 martin __unreachable(); 149 1.2.2.2 martin default: 150 1.2.2.2 martin DPRINTF("Before exiting of the child process\n"); 151 1.2.2.2 martin _exit(exitval); 152 1.2.2.2 martin } 153 1.2.2.2 martin } 154 1.2.2.2 martin DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child); 155 1.2.2.2 martin 156 1.2.2.2 martin expected_signo = SIGCHLD; 157 1.2.2.2 martin expected_pid = child; 158 1.2.2.2 martin switch (sigval) { 159 1.2.2.2 martin case SIGKILL: 160 1.2.2.2 martin expected_code = CLD_KILLED; 161 1.2.2.2 martin expected_status = SIGKILL; 162 1.2.2.2 martin break; 163 1.2.2.2 martin case SIGSTOP: 164 1.2.2.2 martin expected_code = CLD_STOPPED; 165 1.2.2.2 martin expected_status = SIGSTOP; 166 1.2.2.2 martin break; 167 1.2.2.2 martin default: 168 1.2.2.2 martin break; 169 1.2.2.2 martin } 170 1.2.2.2 martin 171 1.2.2.2 martin PARENT_TO_CHILD("raise1 child", parent_child, msg); 172 1.2.2.2 martin 173 1.2.2.2 martin switch (sigval) { 174 1.2.2.2 martin case SIGKILL: 175 1.2.2.2 martin break; 176 1.2.2.2 martin default: 177 1.2.2.2 martin PARENT_FROM_CHILD("raise2 child", parent_child, msg); 178 1.2.2.2 martin 179 1.2.2.2 martin DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for " 180 1.2.2.2 martin "child\n"); 181 1.2.2.2 martin SYSCALL_REQUIRE(ptrace(PT_GET_SIGINFO, child, &info, 182 1.2.2.2 martin sizeof(info)) != -1); 183 1.2.2.2 martin 184 1.2.2.2 martin DPRINTF("Signal traced to lwpid=%d\n", info.psi_lwpid); 185 1.2.2.2 martin DPRINTF("Signal properties: si_signo=%#x si_code=%#x " 186 1.2.2.2 martin "si_errno=%#x\n", 187 1.2.2.2 martin info.psi_siginfo.si_signo, info.psi_siginfo.si_code, 188 1.2.2.2 martin info.psi_siginfo.si_errno); 189 1.2.2.2 martin 190 1.2.2.2 martin ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, sigval); 191 1.2.2.2 martin ATF_REQUIRE_EQ(info.psi_siginfo.si_code, SI_LWP); 192 1.2.2.2 martin 193 1.2.2.2 martin expected_code = CLD_EXITED; 194 1.2.2.2 martin expected_status = exitval; 195 1.2.2.2 martin 196 1.2.2.2 martin SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0)); 197 1.2.2.2 martin 198 1.2.2.2 martin break; 199 1.2.2.2 martin } 200 1.2.2.2 martin 201 1.2.2.2 martin await_collected(child); /* XXX: Process is never collected */ 202 1.2.2.2 martin } 203 1.2.2.2 martin 204 1.2.2.2 martin #define TRACEME_RAISE(test, sig) \ 205 1.2.2.2 martin ATF_TC(test); \ 206 1.2.2.2 martin ATF_TC_HEAD(test, tc) \ 207 1.2.2.2 martin { \ 208 1.2.2.2 martin atf_tc_set_md_var(tc, "descr", \ 209 1.2.2.2 martin "Verify " #sig " followed by _exit(2) in a child"); \ 210 1.2.2.2 martin atf_tc_set_md_var(tc, "timeout", "10"); \ 211 1.2.2.2 martin } \ 212 1.2.2.2 martin \ 213 1.2.2.2 martin ATF_TC_BODY(test, tc) \ 214 1.2.2.2 martin { \ 215 1.2.2.2 martin \ 216 1.2.2.2 martin traceme_raise(sig); \ 217 1.2.2.2 martin } 218 1.2.2.2 martin 219 1.2.2.2 martin TRACEME_RAISE(traceme_raise1, SIGKILL) /* non-maskable */ 220 1.2.2.2 martin #if notyet 221 1.2.2.2 martin TRACEME_RAISE(traceme_raise2, SIGSTOP) /* non-maskable */ 222 1.2.2.2 martin TRACEME_RAISE(traceme_raise3, SIGABRT) /* regular abort trap */ 223 1.2.2.2 martin TRACEME_RAISE(traceme_raise4, SIGHUP) /* hangup */ 224 1.2.2.2 martin TRACEME_RAISE(traceme_raise5, SIGCONT) /* continued? */ 225 1.2.2.2 martin TRACEME_RAISE(traceme_raise6, SIGTRAP) /* crash signal */ 226 1.2.2.2 martin TRACEME_RAISE(traceme_raise7, SIGBUS) /* crash signal */ 227 1.2.2.2 martin TRACEME_RAISE(traceme_raise8, SIGILL) /* crash signal */ 228 1.2.2.2 martin TRACEME_RAISE(traceme_raise9, SIGFPE) /* crash signal */ 229 1.2.2.2 martin TRACEME_RAISE(traceme_raise10, SIGSEGV) /* crash signal */ 230 1.2.2.2 martin #endif 231 1.2.2.2 martin 232 1.2.2.2 martin ATF_TP_ADD_TCS(tp) 233 1.2.2.2 martin { 234 1.2.2.2 martin setvbuf(stdout, NULL, _IONBF, 0); 235 1.2.2.2 martin setvbuf(stderr, NULL, _IONBF, 0); 236 1.2.2.2 martin 237 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise1); 238 1.2.2.2 martin #if notyet 239 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise2); 240 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise3); 241 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise4); 242 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise5); 243 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise6); 244 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise7); 245 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise8); 246 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise9); 247 1.2.2.2 martin ATF_TP_ADD_TC(tp, traceme_raise10); 248 1.2.2.2 martin #endif 249 1.2.2.2 martin 250 1.2.2.2 martin return atf_no_error(); 251 1.2.2.2 martin } 252
Indexes created Sun Oct 12 09:09:55 GMT 2025