t_siginfo.c revision 1.4
1 /* $NetBSD */ 2 3 /*- 4 * Copyright (c) 2010 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 #include <atf-c.h> 30 31 #include <sys/inttypes.h> 32 #include <sys/resource.h> 33 #include <sys/time.h> 34 #include <sys/ucontext.h> 35 #include <sys/wait.h> 36 37 #include <assert.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <unistd.h> 42 43 #ifndef __vax__ 44 #include <ieeefp.h> 45 #endif 46 47 /* for sigchild */ 48 pid_t child; 49 int code; 50 int status; 51 52 /* for sigfpe */ 53 sig_atomic_t fltdiv_signalled = 0; 54 sig_atomic_t intdiv_signalled = 0; 55 56 static void 57 sig_debug(int signo, siginfo_t *info, ucontext_t *ctx) 58 { 59 unsigned int i; 60 61 printf("%d %p %p\n", signo, info, ctx); 62 if (info != NULL) { 63 printf("si_signo=%d\n", info->si_signo); 64 printf("si_errno=%d\n", info->si_errno); 65 printf("si_code=%d\n", info->si_code); 66 printf("si_value.sival_int=%d\n", info->si_value.sival_int); 67 } 68 if (ctx != NULL) { 69 printf("uc_flags 0x%x\n", ctx->uc_flags); 70 printf("uc_link %p\n", ctx->uc_link); 71 for (i = 0; i < __arraycount(ctx->uc_sigmask.__bits); i++) 72 printf("uc_sigmask[%d] 0x%x\n", i, 73 ctx->uc_sigmask.__bits[i]); 74 printf("uc_stack %p %lu 0x%x\n", ctx->uc_stack.ss_sp, 75 (unsigned long)ctx->uc_stack.ss_size, 76 ctx->uc_stack.ss_flags); 77 for (i = 0; i < __arraycount(ctx->uc_mcontext.__gregs); i++) 78 printf("uc_mcontext.greg[%d] 0x%lx\n", i, 79 (long)ctx->uc_mcontext.__gregs[i]); 80 } 81 } 82 83 static void 84 sigalrm_action(int signo, siginfo_t *info, void *ptr) 85 { 86 87 sig_debug(signo, info, (ucontext_t *)ptr); 88 89 ATF_REQUIRE_EQ(info->si_signo, SIGALRM); 90 ATF_REQUIRE_EQ(info->si_code, SI_TIMER); 91 ATF_REQUIRE_EQ(info->si_value.sival_int, ITIMER_REAL); 92 93 atf_tc_pass(); 94 /* NOTREACHED */ 95 } 96 97 ATF_TC(sigalarm); 98 99 ATF_TC_HEAD(sigalarm, tc) 100 { 101 102 atf_tc_set_md_var(tc, "descr", 103 "Checks that signal trampoline correctly calls SIGALRM handler"); 104 } 105 106 ATF_TC_BODY(sigalarm, tc) 107 { 108 struct sigaction sa; 109 sa.sa_flags = SA_SIGINFO; 110 sa.sa_sigaction = sigalrm_action; 111 sigemptyset(&sa.sa_mask); 112 sigaction(SIGALRM, &sa, NULL); 113 for (;;) { 114 alarm(1); 115 sleep(1); 116 } 117 atf_tc_fail("SIGALRM handler wasn't called"); 118 } 119 120 static void 121 sigchild_action(int signo, siginfo_t *info, void *ptr) 122 { 123 if (info != NULL) { 124 printf("info=%p\n", info); 125 printf("ptr=%p\n", ptr); 126 printf("si_signo=%d\n", info->si_signo); 127 printf("si_errno=%d\n", info->si_errno); 128 printf("si_code=%d\n", info->si_code); 129 printf("si_uid=%d\n", info->si_uid); 130 printf("si_pid=%d\n", info->si_pid); 131 printf("si_status=%d\n", info->si_status); 132 printf("si_utime=%lu\n", (unsigned long int)info->si_utime); 133 printf("si_stime=%lu\n", (unsigned long int)info->si_stime); 134 } 135 ATF_REQUIRE_EQ(info->si_code, code); 136 ATF_REQUIRE_EQ(info->si_signo, SIGCHLD); 137 ATF_REQUIRE_EQ(info->si_uid, getuid()); 138 ATF_REQUIRE_EQ(info->si_pid, child); 139 if (WIFEXITED(info->si_status)) 140 ATF_REQUIRE_EQ(WEXITSTATUS(info->si_status), status); 141 else if (WIFSTOPPED(info->si_status)) 142 ATF_REQUIRE_EQ(WSTOPSIG(info->si_status), status); 143 else if (WIFSIGNALED(info->si_status)) 144 ATF_REQUIRE_EQ(WTERMSIG(info->si_status), status); 145 } 146 147 static void 148 setchildhandler(void (*action)(int, siginfo_t *, void *)) 149 { 150 struct sigaction sa; 151 sa.sa_flags = SA_SIGINFO; 152 sa.sa_sigaction = action; 153 sigemptyset(&sa.sa_mask); 154 sigaction(SIGCHLD, &sa, NULL); 155 } 156 157 static void 158 sigchild_setup(void) 159 { 160 sigset_t set; 161 struct rlimit rlim; 162 163 (void)getrlimit(RLIMIT_CORE, &rlim); 164 rlim.rlim_cur = rlim.rlim_max; 165 (void)setrlimit(RLIMIT_CORE, &rlim); 166 167 setchildhandler(sigchild_action); 168 sigemptyset(&set); 169 sigaddset(&set, SIGCHLD); 170 sigprocmask(SIG_BLOCK, &set, NULL); 171 } 172 173 ATF_TC(sigchild_normal); 174 ATF_TC_HEAD(sigchild_normal, tc) 175 { 176 177 atf_tc_set_md_var(tc, "descr", 178 "Checks that signal trampoline correctly calls SIGCHLD handler " 179 "when child exits normally"); 180 } 181 182 ATF_TC_BODY(sigchild_normal, tc) 183 { 184 sigset_t set; 185 186 sigchild_setup(); 187 188 status = 25; 189 code = CLD_EXITED; 190 191 switch ((child = fork())) { 192 case 0: 193 sleep(1); 194 exit(status); 195 case -1: 196 atf_tc_fail("fork failed"); 197 default: 198 sigemptyset(&set); 199 sigsuspend(&set); 200 } 201 } 202 203 ATF_TC(sigchild_dump); 204 ATF_TC_HEAD(sigchild_dump, tc) 205 { 206 207 atf_tc_set_md_var(tc, "descr", 208 "Checks that signal trampoline correctly calls SIGCHLD handler " 209 "when child segfaults"); 210 } 211 212 ATF_TC_BODY(sigchild_dump, tc) 213 { 214 sigset_t set; 215 216 sigchild_setup(); 217 218 status = SIGSEGV; 219 code = CLD_DUMPED; 220 221 switch ((child = fork())) { 222 case 0: 223 sleep(1); 224 *(long *)0 = 0; 225 atf_tc_fail("Child did not segfault"); 226 /* NOTREACHED */ 227 case -1: 228 atf_tc_fail("fork failed"); 229 default: 230 sigemptyset(&set); 231 sigsuspend(&set); 232 } 233 } 234 235 ATF_TC(sigchild_kill); 236 ATF_TC_HEAD(sigchild_kill, tc) 237 { 238 239 atf_tc_set_md_var(tc, "descr", 240 "Checks that signal trampoline correctly calls SIGCHLD handler " 241 "when child is killed"); 242 } 243 244 ATF_TC_BODY(sigchild_kill, tc) 245 { 246 sigset_t set; 247 248 sigchild_setup(); 249 250 status = SIGPIPE; 251 code = CLD_KILLED; 252 253 switch ((child = fork())) { 254 case 0: 255 sigemptyset(&set); 256 sigsuspend(&set); 257 break; 258 case -1: 259 atf_tc_fail("fork failed"); 260 default: 261 kill(child, SIGPIPE); 262 sigemptyset(&set); 263 sigsuspend(&set); 264 } 265 } 266 267 static void 268 sigfpe_flt_action(int signo, siginfo_t *info, void *ptr) 269 { 270 271 sig_debug(signo, info, (ucontext_t *)ptr); 272 273 if (fltdiv_signalled++ != 0) 274 atf_tc_fail("FPE handler called more than once"); 275 276 ATF_REQUIRE_EQ(info->si_signo, SIGFPE); 277 ATF_REQUIRE_EQ(info->si_code, FPE_FLTDIV); 278 ATF_REQUIRE_EQ(info->si_errno, 0); 279 } 280 281 ATF_TC(sigfpe_flt); 282 ATF_TC_HEAD(sigfpe_flt, tc) 283 { 284 285 atf_tc_set_md_var(tc, "descr", 286 "Checks that signal trampoline correctly calls SIGFPE handler " 287 "for floating div-by-zero"); 288 } 289 290 ATF_TC_BODY(sigfpe_flt, tc) 291 { 292 struct sigaction sa; 293 double d = strtod("0", NULL); 294 295 sa.sa_flags = SA_SIGINFO; 296 sa.sa_sigaction = sigfpe_flt_action; 297 sigemptyset(&sa.sa_mask); 298 sigaction(SIGFPE, &sa, NULL); 299 #ifndef __vax__ 300 fpsetmask(FP_X_INV|FP_X_DZ|FP_X_OFL|FP_X_UFL|FP_X_IMP); 301 #endif 302 printf("%g\n", 1 / d); 303 if (fltdiv_signalled == 0) 304 atf_tc_fail("FPE signal handler was not invoked"); 305 } 306 307 static void 308 sigfpe_int_action(int signo, siginfo_t *info, void *ptr) 309 { 310 311 sig_debug(signo, info, (ucontext_t *)ptr); 312 313 if (intdiv_signalled++ != 0) 314 atf_tc_fail("INTDIV handler called more than once"); 315 316 ATF_REQUIRE_EQ(info->si_signo, SIGFPE); 317 if (info->si_code == FPE_FLTDIV) 318 atf_tc_expect_fail("PR port-i386/43655 : integer div-by-zero " 319 "reports FPE_FLTDIV instead of FPE_INTDIV"); 320 ATF_REQUIRE_EQ(info->si_code, FPE_INTDIV); 321 ATF_REQUIRE_EQ(info->si_errno, 0); 322 } 323 324 ATF_TC(sigfpe_int); 325 ATF_TC_HEAD(sigfpe_int, tc) 326 { 327 328 atf_tc_set_md_var(tc, "descr", 329 "Checks that signal trampoline correctly calls SIGFPE handler " 330 "for integer div-by-zero"); 331 } 332 333 ATF_TC_BODY(sigfpe_int, tc) 334 { 335 struct sigaction sa; 336 long l = strtol("0", NULL, 10); 337 338 sa.sa_flags = SA_SIGINFO; 339 sa.sa_sigaction = sigfpe_int_action; 340 sigemptyset(&sa.sa_mask); 341 sigaction(SIGFPE, &sa, NULL); 342 #ifndef __vax__ 343 fpsetmask(FP_X_INV|FP_X_DZ|FP_X_OFL|FP_X_UFL|FP_X_IMP); 344 #endif 345 printf("%ld\n", 1 / l); 346 if (intdiv_signalled == 0) 347 atf_tc_fail("FPE signal handler was not invoked"); 348 } 349 350 static void 351 sigsegv_action(int signo, siginfo_t *info, void *ptr) 352 { 353 354 sig_debug(signo, info, (ucontext_t *)ptr); 355 356 ATF_REQUIRE_EQ(info->si_signo, SIGSEGV); 357 ATF_REQUIRE_EQ(info->si_errno, 0); 358 ATF_REQUIRE_EQ(info->si_code, SEGV_MAPERR); 359 ATF_REQUIRE_EQ(info->si_addr, (void *)0); 360 361 atf_tc_pass(); 362 /* NOTREACHED */ 363 } 364 365 ATF_TC(sigsegv); 366 ATF_TC_HEAD(sigsegv, tc) 367 { 368 369 atf_tc_set_md_var(tc, "descr", 370 "Checks that signal trampoline correctly calls SIGSEGV handler"); 371 } 372 373 ATF_TC_BODY(sigsegv, tc) 374 { 375 struct sigaction sa; 376 377 sa.sa_flags = SA_SIGINFO; 378 sa.sa_sigaction = sigsegv_action; 379 sigemptyset(&sa.sa_mask); 380 sigaction(SIGSEGV, &sa, NULL); 381 382 *(long *)0 = 0; 383 atf_tc_fail("Test did not fault as expected"); 384 } 385 386 ATF_TP_ADD_TCS(tp) 387 { 388 389 ATF_TP_ADD_TC(tp, sigalarm); 390 ATF_TP_ADD_TC(tp, sigchild_normal); 391 ATF_TP_ADD_TC(tp, sigchild_dump); 392 ATF_TP_ADD_TC(tp, sigchild_kill); 393 ATF_TP_ADD_TC(tp, sigfpe_flt); 394 ATF_TP_ADD_TC(tp, sigfpe_int); 395 ATF_TP_ADD_TC(tp, sigsegv); 396 397 return atf_no_error(); 398 } 399
Indexes created Thu Oct 02 14:10:14 GMT 2025